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HomeMy WebLinkAboutResolution No. 1190A RESOLUT IONNO . / 90 A RESOLUTION OF. THE CITY, COUNCIL OF THE CITY OF AZUSA ADOPTING SPECIFICATIONS NO. 3 (NEW SERIES) FOR THE CONSTRUCTION OF CEMENT CON- CRETE CURB, CEMENT CONCRETE SIDEWALK AND CEMENT CONCRETE DRIVEWAYS, WITHIN SAID CITY. - - - - - - - 0 - - - - - - - BE IT RESOLVED, by the City council of the City of Azusa, that the following specifications, to be known as Specifications No. 3 (New Series), for the construction of cement concrete curb, cement concrete sidewalk, and cement.concrete driveways, in the City of Azusa, be, and the same are, hereby adopted. WORK TO BE DONE Under these specifications the Contractor will be required: 1. To excavate or fill in to such an extent and in such a manner as may be required by.the plans, profiles and cross-sections, and these specifications, the area upon which the improvements hereinafter provided for are to be constructed; 2. To furnish all materials as hereinafter provided for and required for the construction and completion of the improvements in accordance with the plans and specifications, and all labor, tools and equipment necessary for.the performance of said work; 3. To grade and construct cement concrete curb, cement con- crete sidewalk and cement concrete driveways, as hereinafter specified. CiRAD 1.N. Grading s:_.11 include all filling, the re,novo.l of all Ccr til, said, stolle or all Othcr lateric,l of ',rh .tcvor nature it ,ray be that may be cngou_htered in preparing the road or street, and ghich also includes �,_ll trismir_� <:nd shaping required to bring tac surface of the road or street to Ear -.dc and cross section. filen mud or other soft material is encountered, it shell be taken out and the space filled r:ith good ee.rtz, send or gravel, waich, if it is earti: or gra,vel,sball be rolled until the surface of the foundation ceases to creep in front of the roller. The Contractor , iioPeveT, will not be required in such cases to •excavate nlud or other soft nla.terial to a depth greater than two (2) feet below the subgrado. All fillin,L sh,,.11 be done 7ita rood, sound cc.rth, grr.vel or send.eneveT fill is to be nl..do of e"rth or gr:vol,tho embankment si_11 be brouE'ht up in lz:yers not oxccoding twelve (12) inc:^-es in dcpih, and each laver thoroughly da_zpened and rolled with a. roller weigi.ing not lass VIM tyro '-hundred (200) pounds per lineal inch of tire uYntil it is finny co;;;pacted, or t'.ho fill, if made of eerth may be brougllt up in layers not to exceed two (2) feet in trickness, c_ch layer being diked and filled with ^.ator to settle and compcct the sure, this method to be repeated with ec.ch layer until brought to grede. The final layer, -,.fter drying out but 7r:iilo still in dF-:ip condition, sa�1,11 be, rolled with a roller as herein provided, until fil;lly compacted. iffhon the fill is :l..ce with sand, it shall be brought up to gTade and compacted by thoroughly getting the fill. No ;tat Crial Of a perishable, spongy or othCTS?isc im— proper nature stall be used in filling. The space over N-rhich fills are to be ;rade sh:.11 first be cleared of all brush, timber, needs, trash or other debris unfitted for foundation, end then thoroughly plo^,ed and broken up to allow net^ -nd old materi^.1 to unite and bond together. During t?le process of grading, t:le ro_.d or street shall be maintained in a reasonably good condition for traffic, care being taken to remove the surplus Material as evenly as possible over the entire surface of the road or street. Any street intersecting the street in rdiich the Bork is being done May be closed at =.lhy time, provided that the closed streets are not next to each other, and tat each alternate street crossing is kept open. When constructing emban"ments, the teams or trucks shall be made to travel as evenly as possible over the whole surface of each layer, both coming and 6oino. The formation of well defined ruts is specially prohibited. Clods or hard luanps of earth larger than six (6) inches in greatest dimension shall be broken up before being placed in embankment. The embankment shall be caxried to such height above grade, and to such increased width as may be necessary to provide for shrinkage and cc:apression, and they must be maintained by the Contractor at the proper height, dimension and slope until the work is finally accept -ed. The width of the road or street to he graded shall confor;n to tc.e plans, profiles and cross seotions. � - M sifter a section of rot.d or street has been gTaded as herein specified, the surface shell be thoroughly drenched with water, end when sufficiently dry shall be cultivated and rolled wit'i e, roller weighing not less than fca:• hundred (400) pounds to the lineal inch width of tire, until the surface is unyielding. Depressions made by roiling, shall be leveled up with food earth and again rolled. Such portions of the road or street that cannot be reached by the roller and all places excavated below, subg,rade end refilled, and all pipe trenches and other places that cannot be properly compacted by the roller shall be hand-te:ped until solid and unyielding. In c;.ses of Tvet weather, or soft or ;ruddy 6Tound aakin use of te.e roller unsafe or impracticable, the rollinr_ sli�,ll not be underttaon until the ground has becoae sufficiently dry. If the sub�rfade consists of sand, it shall be coi2pc_cted by wetting down thoroughly and smoothed to conform, to cross section. The Contractor snz_ll notify the EnL;ineer he.s been brou€ht to subgrade -.vhen the latter will elevations of the same, ^nd if the 'aor'r. is found t ance ?pita the specifications and gr^ales given, the shall proceed as '_iereinafter ::aentioncd. A w:en a section chec'_c t. e o ire in accord - Contractor I CENRn r r* All cement shall be Portland Cement, and must conform to the follo­7in� requirements and be subject to the follol*ing tests, 1.rhich will be open to the Contractor and will be made by the methods and under the conditions orescribed in Specifications 0-9-17, adopted by the American Society for Testing Vatfrials in 1916. (a) COD?SISTENCY: All cement for set tests, test pats, and neat briquettes mill be mixed with sufficient water to reduce the cement to normal consistency, as prescribed by the Specifications of the American Society for Testing ;,materials, hereinbefore re- ferred to. Neat briquettes will be compacted by light tamping, Yortar briquettes shall be mixed to a state of plasticity corre- sponding as nearly as possible to normal consistency in neat briquettes. (b) FINENESS: The cement must be evenly ground, and when tested with the followin6 standard sieves, must pass at least the following percentages by weight: No. 100 Sieve, having 100 meshes per lineal inch - 92 per cent. No. 200 Sieve, having 200 meshes per lineal inch - 75 per cent. (c) TIME OF SETTING: It shall develop initial set in not ^° less than one hour, nor more than ten hours. (d) TENSILE STRENGTH.: Neat briquettes one inch square in section shall attain a minimum strength;r«a follows: u:. At 24 hours in racist air - 17�s. pounds. At 7 days (1 day in moist air ant six in pater) -500 600 poundsAt 28 days (1 day in moist air and 27 days in :eater) Briquettes one inch square in section, made of one part of cement, three parts of. standard testing; sand., shall. attain -a minimum strength as follows: At 7 days (1 day in moist air and 6 days in mater) 200 pounds. At 28 days (1 day in moist air and 27 daps in *rater) 275 pounds. The sand test must in all cases shote an increase in strength at 28 days over the 7 -day tests. (e) SOUNDNESS: Pets of neat cement about three inches in diameter, one-half inch thick at the cor_ter, and tapering; to a thin edge, will be kept in moist air for a period of 24 hours. A pat will then be kept in air at normal temperature and observed at intervals for at least 28 days. Another pat will, after having been. 'sept 24 hours in moist air, be placed in -anter at norinal temperature and maintained for three hours. These puts, to satisfactorily pass tine requirements, rust remain firm and hard, and must not shorn any si.4nc Of ''7.EtOrtiOn, checking, cracking, blotching or disinte_rating. t (f) PROTECTION: All cement stored must be protected from the -Cather and be delivered to the mork in the original package of the manufacturer. No cement shall be used iihich has been mixed in any sway with another brand or quality of cement or which has baen tampered with in any way after being placed in the original. package of the nanufecturer, nor shall my cement be used fro. -,i packs:,es containing lumpy cement or 1--hich has been reground. S DEFINITION OF SAND. SAND 1 4 The fine, granular :material naturally or artificially produced by the disintegration or erosion of rock. SPECIFICATIONS AND TESTS FOR SAPID TO BE USED FOR CLASSES °A«, "Brr AND OCU CEMENT CONCRETE, 1. OIL. Sand shall be free from oil. 2. ORGANIC ','ATTER. Sand, when tested in accordance with Method of Test hereinafter described, shall not show a solution color darker than the standard color solution. 3. STRENGTH. Sand, when tested in accordance with Method of Test hereinafter described, shall not show compressive strength at the aSe of seven (7) days, less than that of Ottawa Standard Sand, similarly tested. 4. WASHING. Sand shall be thoroughly and uniformly washed. After washinc-, sand, when tested in accordance with Method of Test hereinafter described, shall not contain more than three (3) per cent, by weight, of silt, loam, clay, etc. 5. SIEVE ANALYSIS. Sand, when tested in accordance with Method of Test hereinafter described, shall conform to the follow- ing sieve analysis, by weight: (a) Not more than five (5) per cent minus the per cent of silt, loam, clay, etc., determined above (Paragraph 4, "Washing") shall pass a No. 100 sieve. (b) Not less than twenty (20) per cent and not more than fifty (50) per cent shall pass a No. 30 sieve. (c) Not less than ninety-five (95) per cent shall pass a No. 4 sieve. (d) All shall pass a 3/8 inch sieve. h.Ji[ 17�_•'.'. SPECIFICATIONS FOR SAND TO BE USED IN CEMENT MORTAR FINISH AND CEMENT MORTAR. 1. OIL. Sand shall be free from oil. 2. ORGANIC MATTER. Sand, when tested in accordance with Method of Test hereinafter described, shall not show a solution color darker than the Standard color solution. 3. STRENGTH. Sand, when tested in accordance with iRethod of Test hereinafter described, shall not show compressive strength at the age of seven (7) days less than that of Ottawa Standard Sand.. similarly tested. 4. TRASHING. Sand shall be thoroughly and uniformly washed. After washing, sand, when tested in accordance with Method of Test, hereinafter described, shall not contain more than three (3) per cent, by weight, of silt, loam, clay, etc. 5. SIEVE ANALYSIS. Sand arisen tested in accordance with Method of Test ereinaf er described, shall conform to the follow- ing analysis, by weight; A. Not more than six (c) per cent minus the per cent of silt. loam, clay, etc. determined above (Par. 4, "Washingtt) shall pass a. No. 100 sieve. B. Not less than seventeen (17) per cent and not more than forty-two (42) per cent shall pass a No. 30 sieve. C. All shall pass a No. 4 sieve. METHODS OF TESTS OF SAND FOR ALL CLASSES OF CEMENT CONCRETE AND FOR CrMENT MORTAR FINISH A. METHOD OF TEST FOR ORGANIC IMPURITIES. 1. (a) A representative test sample of sand of about 1 lb. shall be obtained by quartering or by the use of a sampler. (b) A 12 oz, graduated glass prescription bottle shall be filled to the 4 1/2 oz, mark with the sand to be tested. (c) A three (3) per cent solution of sodium hydroxide (NaOH) in water shall be added until the volur.e of sand and liquid, after shaking, gives a total value of seven (7) liquid ounces. (d) The bottle shall be stoppered and shaken thoroughly and then allowed to stand for 24 hours. (e) A standard color solution shall be prepared by adding 2.5 cc. of a 2 per cent solution of tannic acid in 10 per cent'alcohol to 22.5 cc. of a 3 pAr cent sodium hydroxide solution. This shall be placed in a. 12 oz. prescription bottle, stoppered and allowed to stand for 24 hours, then 25 cc. of water added. (f) The color of the clear liquid above the sand shall be compared with, the standard color solution prepared as in paragraph (e) or with_ a glass of color similar to the Standard solution. 2. Solutions darker in color than the standard color have a "Color Value" higher than 250 parts per million in terms of tannic acid. B. METHOD OF TEST FOR STRENGTH Both concrete sand and Ottawa. Standard Sand (the latter as hereinbelow described and defined) shall be made into mortar composed of one (1) part, by weight, of Portland Cement, and two (2) parts by weight of sand. The consistency of the mortar made with concrete sand shall be the same as that of the mortar made with Ottawa Standard Sand. All raortax test specimens shall be made, stored and tested as hereinbelow described. 7 MIXING CEMENT MORTAR. 1. The quantity of dry material to be mixed at one time shall not exceed 1000 g. nor be less than 500 g. The proportions of cement, or cement and sand, shall be stated, by weight in grams of the dry materials; the quantity of water shall be expressed in cubic centimeters (1 cc. of water - one g.?. The dry materials shall be weighed, placed upon a non-absorbent surface, thoroughly :nixed dry if sand is used, and a crater formed in the center, into which the proper percentage of clean wa'Uer shall be poured; the material on the oster ede shall be turned into the crater by the aid of a trowel. After an interval of 1%2 minute for the absorption of the water, the operation shall be completed by continuous, vigorous mixing, squeezing and kneading with the hands for at least one minute. During the operation of mixing, the hands should be protected by rubber gloves. Ir_ order to secure uniformity in the results of tests for compression strength, the manner of mixing above described should be carefully followed. At least one minute is necessary to obtain the desired plasticity which is not appreciably affected by continuing the mixing for several minutes. The exact time necessary is dependent upon the personal equation of the operator. The error in mixing should be on the side of over -mixing. 2. The temperature of the room and the mixing water small be maintained, as nearly as practicable, at 210 c.(706F). 09 OunrDIslency of mortal. Fourteen per cent (14°x) of 1Fater shall be used with Ottawa Standard Sand. To obtain the same consistencir with the concrete sand, a metal truncated cone four inches (411) ,in greatest di6m..eter, two inches (21,) in smallest diameter, and six inches (6+,) high, shall be used. The consistency of the concrete so.nd mortar and that of the Ottawa Sta=ndard Sand mortar shall be considered t:ne same when their respective slumps, made as above, are equal. Compression Tests. 1. A cylindrical test piece 2 in. in diameter and 4 in. in length is recommended for use in makin, compression tests of standard ,nortars. The ,olds shall ,a lL e of non-corrodin4 metal. A satisfactory form of ,mold is shown in 'iL-,. 1, Page 134, of A.S.T.t,. 1924 book of Tentetive Standards. The ends of the mold shall be p-rallel. The tubing used in the molds shall be of sufficient thickness to prevent appreciable distortion. The molds shall be oiled before using. During the molding'of the piece, the mold shall rest on a clean, plane surface (preferable a. piece of plate glass which is allowed to remain in n_lece until the mold is removed) . 2.: The sand to be used shall be natural sand from Ottawa, Ill., scree d to pass a No. 20 sieve and retained on a No. 30 sieve. Thi sand may be obtained from the Ottawa Gilicia Co., at a cost of three cents per pound, f,o.b. cars, Ottawa, Ill. 3. The send, having passed the �,,To. 20 sieve, shall.be considered standard when not more than 5 g. passes the No. 30 sieve after one minute continuous sieving of a 500-g sa=mple. tions; 4. The sieves shall conform to the following specifics - The No. 20 sieve shall have between 19.5 and 20.5 wires per whole inch of the warp wires, and between 19 and 21 wires per whole inch of the shoot wires. The diameter of the wire should be 0.0165 in. and the average diameter shall not be outside the limits of 0.0160 and 0.0170 in. The No. 30 sieve shall have between 29.5 and 30.5 wires per whole inch of the toarp wires and between. 28.5 and 31.5 wires per whole inch of the shoot wires, The -diameter of the wire should be 0.011 in. and the average diameter shell not be outside the limits 0.0105 to 0.0115 in. 5. The mortar shall be placed in the mold in layers about 1 in. in thickness, each layer being tamped by means of the steel tamper shoum in Fid,. 2, page 134, of A.S.T.6. 1924 rook of Tentative standards. The weight of tamper shall be approximately 3/4 lb. In finishing the test piece, the mortar shall be heaped above the mold and smoothed off with a trowel. As soon as the test pieces from one sa;rnle are molded, the top of each test piece shall be covered with a. piece of glass ,nhich is brought to a firm bearing on the fresh m=ortar. The cover glasses shall remain in plane until molds are removed. S. Tests of standard mortar cylinders sh^.11 be -jade in any testing machine „-hich is r;dapted to meet the specified. re- quirements. The test pieces shall be tested ^s soon is removed. X rom the *mater. The ends of tie test cylinders shall be smooth plane surfaced. The metal beerin& plates of the testing machine shall be ~laced in direct contact with the ands of the test piece. Durinc the test a spherical bearin&,, bloc:K shall be used on top of the cylinder. in order to secure a uniform distribution of the load over the test cylinder the spherical bearing block must be accurately centered. The diameter of the spherical bearing block should be only a little greater than that of the test piece. Tire test piece shall oe loaded continuously to failure. The moving need of the testing machine shall travel at the rate of not less than 0.05 or -Er:ore than 0.10 in. per minute. 7. Testing machines fishould be frequently calibrated in order to determine their accuracy. 3. Cylinders that are manifestly faulty, or which give strengths differi,U more than 15 per cent from the average value of all test pieces tested at the sane oeriod and rude from the same sample, shall not be considered in determining the compressive strength. StoraKe of Test ?iecen 1. The moist closet may consist of a soapstone, elate or concrete box, or a wooden box lined. frith metal.. Tf a wooden box is used, the interior should be cohered with felt or broad trickering kept wet. The bottin of the moist closet should be covered with water. The interior of the closet should be provided Frith non-absorbent shelves on which to place the test pieces, the shelves being, so arranged th.t they maY be withdrawn readily. 2. Al! test pieces, immediately after molding, shall be placed in the moist closet for from �"0 to 24 hours. 3. The briquettes shall be kept in molds on glass plates in the moist closet for at least 20 hours. After from,, 20 to 24 hours in moist air the briquettes shall be immersed in clean eater in storage tanks of nen-corroding material. 4. The pir and water shall be x,sir,ta.ined as nearly as practicable at a temperature of 2100. (70o .). C. Method of Test for DecantEtion. 1. This method of test covers the determ-in-:tion of the total quantity of silt, iot.m, clay, etc., in sand and other fine aggregates. 2. The pan or vessel to be used in the determin_tion shall be approximately 9 in. (230 mm.) in diameter and not less than 4 in. (102 mm.) in depth. 3. The sample must contain sufficient moisture to pre- vent seeregation and shall be thoroughly :nixed. A representative portion of the ea.rple sufficient to yield approximately 500 g. of dried material shall then be dried to a. constent weight at a temperature not exceeding 100 C.° (2300F). 4. The dried mater ial''shall be placed in the pan ,end sufficient water added to cover the sample (about 225 cc.). The contents of the pan shall be agitated vigorously for 15 seconds, and then be allowed to settle for 15 sacc_nds, Ffter 1rhich the mater shall be poured off, care being taken not to pour off any sand. This operation shall be repeated until the wash water is clear. As a precaution, the -ash !Rater shall be. poured through a_ 200-mosh sieve and any material retained thereon returned to the n-ashed sample. Tile .-asked sand shall be dried to a constant weight at a temperature not exceeding 100°C. (2300F.) and weighed. /O 5. The results shall be calculated from the formula: Percentage of silt, clay, locar;!, etc., Ori�,inal dry =vei�__ht after •-ashing v 100 Original dry weie,ht S. "Then check determinE:tio.is ere desired, the mash rater shall be evaporated to dryness, the residue neighed, and the percentage calculated from the formula: "reight of residue x 100 Percentage of silt, loam, clay, etc. - Original dry weight D. Method of Test for Sieve Analysis. 1. A representative test sample of the aggregate shall be selected by quartering or by use of a sa:rpler, which after drying �^ill give not less than the following: b�Fine aggregate, 500 g. CoErse aggregate or a m - fixture of fine and coarse aggregates, weight in granas, 3000 timos size of largest sieve required, measured in inches. .AKE 2. 2. The. sa:ple shall be dried at not over 110OF (2300F) to constant =weight. 3. (a.) V,e sieves shall be of square -mesh wire -cloth end shall be moun'ed on substvntial frames constructed in a manner th-t -rill prevent lo.s of material during sifting. (b) The size of wire and sieve openings shall be as given in Table 2. 4• (a) The sample shall be seDarated into a series of sires by means of the sieves specified in par•.graph 3 above. Sifting shall be continued. until not more then one (1) per cent by Teight of the sample passes any sieve during one (1) minute. (b) Each size shall be =vei�,hed. on a ba.lence or scale which is sensitive to 1,/3.000 of the r•eitht of the test sample. (c) The percenta.Le by -eight of the total sample which is finer than each of the sieves shall be comwted. 5. (a) The percentages in sieve analysis shall be reported to the nearest -hole number. Sieve Openin;�, Tire. _ism. Tolerance per cent. mire Maxi - No. or Avg. Dian. m'am Size in Inches opng. Und. Over open - No.�0 mr,l. mm. —� 49��05 r :r.. .102 in:____ 4� 0 _ __ 15 �ing 35 40 No. 30 0.59 0.0232 0.33 0.0130 5 15 30 25 No. 4 4.76 0.187 1.27 0.050 3 15 30 10 No. 3 6.680 0.263 1.78 0.070 3 15 30 10 3/8 in. _ 9.5 0.375 2.33 0.092 3 10 10 10 2. The. sa:ple shall be dried at not over 110OF (2300F) to constant =weight. 3. (a.) V,e sieves shall be of square -mesh wire -cloth end shall be moun'ed on substvntial frames constructed in a manner th-t -rill prevent lo.s of material during sifting. (b) The size of wire and sieve openings shall be as given in Table 2. 4• (a) The sample shall be seDarated into a series of sires by means of the sieves specified in par•.graph 3 above. Sifting shall be continued. until not more then one (1) per cent by Teight of the sample passes any sieve during one (1) minute. (b) Each size shall be =vei�,hed. on a ba.lence or scale which is sensitive to 1,/3.000 of the r•eitht of the test sample. (c) The percenta.Le by -eight of the total sample which is finer than each of the sieves shall be comwted. 5. (a) The percentages in sieve analysis shall be reported to the nearest -hole number. PEA GRAY -L FOR CLASSES "A,°B" & "C" CE'ENT CONCRETE. Pea gravel shall be sound, washed gravel, of clean, hard, tough, durable n;aterial and free from veE;ete.ble or other dele- terious substances. It shall be free from dirt, mud or stone dust. Pea gravel, as furnished, shall be uniformly graded from the largest to the smallest screen or sieve sizes given below. GRADING. itt en analyzed by laboratory screens and sieves, pea gravel for use in Classes ITA" , "B" and 110" cement concrete work sha]Ll conform to grading requirements, as follows: (a) All shall pass a screen having 1/2 inch square openings. (b) Not less than 95 per cent, by weight, shall pass a screen having 3/81, square openings. (c) Yet less than 40 per cent and not r,ore titan. sixty (60) per cent, by weight, shall be retained on a. 4 -mesh sieve having square openings. (d) Piot more than ten (10) per cent, by weight, shall pass a 14-rocsh sieve with square openings. COARSE AGGREGATE FOR CLASS "A" ODKENT CONCRET'. Coarse aggregate shall be sound crushed rock, broken stone or washed gravel, or a combination of both. The particles of coarse aggregate shall be of clean, hard, tough, durable ma- terial and free from vegetable or other deleterious substances. It shall be free from dirt, mud or stone dust. Coarse aggregate, as furnished, shall be uniformly graded from the largest to the sn.allest screen sizes given belo�r. GRADING. Then analyzed by laboratory screens and sieves, coarse aggregate for use in Class "A" cement concretd work shall conform to grading requirements, as follows: (a) All shall pass a screen having two (2) inch square openings. (b) Not less than ninety-five (95) per cent, by weight, shall pass a screen having 11/2« scuc:re op6nJags. thirty-five (c) Not less than IOIX` (35) per cent, and not more than sixty (60) per; cent, by weight, shall be retained on a screen having 3/41, square openings. (d) Not more than five (5) per cent, by weight, shall pass a screen having 3/81, square openings. (e) All shall be retained on a 4 -mesh sieve. COARSE AGGREGATE FOR CLASSES "B" & "C" CEMITT CONCRETE. Coarse aggregate shall be sound, crushed rock, broken stone or washed gravel, or a combination of both. The particles of coarse aggregate shall be of cleen, hard, tough, durable material and free from vegetable or other deleterious substances. It shall be free from dirt, mud or stone dust. Coarse aggregate, as furnished, shall be uniformly graded from the largest to the smallest screen sizes given billow. 1.2 GRADING. When analyzed by laboratory screens and sieves, coarse aggregate for use in Classes Ii Bs and "C" cement concrete work shall conform to grading requirements, as follows: (a) All shall pass a screen having 1" square openings. (b) Not less than sixty (60) per cent, by weight, shall pass a screen having 3/41, square openings. (c) Not more than ten (10) per cent, by weight, shall pass a screen having 3/8+1 squa-e op3n ngs. (d) All shall be retained on a 4—mesh sieve. VATER FOR CLA°SFS 1'A" , "B" AND "C" CZHENT CONCRETE Outer shall be clean, free from oil, acid, alkali or vegetable matter. /3 EXPANSION JOINT FILLER MATERIALS Expansion joint filler shall consist of premoulded strips composed of a durable elastic compound of mineral or vegetable matter or a stable mixture of these elements. The surface of the strips shall be encased with saturated felt or coated with a suitable material to prevent the strips from adhering to each other. The strips shall be of such character that they will not be deformed by ordinary handling after having been exposed for twelve (12) hours at a temperature of one hundred twenty (120) degrees Fahrenheit. Expansion joint filler shall conform to the following requirements: A sample of the joint filler without encasement, four inches by five inches (4+1 x 511) in size, shall be compressed at the rate of one-tenth inch (0.1t') per niinute to one-half its original thickness, the coLnpression being repeated five (5) times at intervals of from one to two hours. When released from Compression, the sample shall return to ninety per cent (90%) of its original thickness within one hour. The total pressure necessary for compression shall not exceed one thousand (1;000) pounds per square inch. A sample four inches by five inches (411 x 511) cut from the finished strip and confined on the two long sides and at one end by a suitable mould shall, when compressed as above, show an extension of not to exceed one-quarter inch (1/411). A sample of the same material two inches by five inches (20 x 511) in size, when clamped between two blocks so that the strip of joint material cantilevers three and one-half inches (3 1/211) and placed in an oven at a temperature of one hundred twenty-five degrees (1250) Fahrenheit for a period of thirty (30) minutes, shall not deflect from the horizontal in excess of one inch (111)_ /'�Z Ak • CEMENT CONCRETE OUSS "A" CEONT CONCRETE Class "A" cement concrete shall be composed of the following materials and be in the following proportions, to -wit: One sack of Portland Cement weighing 94 lbs. nOt to &40 lbs. of mixed aggregate, by weight, except as herein other- ri:: e.pecified and not less than 5 3/4 and not more than 6 gallons cf water, which includes water or moisture contained in the aggregate. The mixed aggregate shall be composed of a combination of 270 lbs. of gravel or broken stone and 270 lbs. of sand and pea gravel, except as herein otherwise specified. CLASS "B" CEMENT CONCRETE Class "B" Cement concrete shall be composed of the following materials and be in the following proportions, to -wit: One sack of Portland Cement weighing 94 lbs. net to 540 lbs. of mixed aggregate, by weight, except as herein otherwise specified, and not less than 5 7/8 and not more than 6 1/4 gallons of water, which includes water or moisture contained in the aggregate. The mixed aggregate shall be composed of a combination of 243 lbs, of gravel or broken stone and 297 lbs. of send and pea graven, except as herein otherwise specified. CLASS "C" CEMENT CONCRETE Class "C" Cement concrete -shall be composed of the following materials and be in the following proportions, to -wit: One sack of Portland Cement weighing 94 lbs. net to 490 lbs. of mixed aggregate, by weight, except as herein otherwise specified, and not less than 5 3/4 and not more than 6 gallons of water, which includes water or moisture contained in the aggregate. The mixed aggregate shall be composed of a combination of 196 lbs. of gravel or broken stone and 294 lbs. of sand and pea gravel, except as herein otherwise specified. The percentage, by weight, of sand and pea gravel for all of the various classes of cement concrete shall be determined by the following formulas: C 100 (A - 3.60) A - B D = 100 - C Where A is the fineness modulus of the pea gravel B is the fineness modulus of the sand C is the percentage of sand, by weight D is the percentage of pea gravel, by weight. The fineness modulus of the sand and the pea gravel shall be deter -mined by a sieve analysis; usin• the folloring sizes of Standard Sieves with square openings: 100 -mesh, 50 -mesh, 30 -mesh, 14 -mesh, 6 -mesh, 4 -mesh, 3/8" -mesh, 3/4" -mesh. The sum of the percentages of material, by weight, of the semple coarser than each of the respective sizes of Standard Sieves hereinbefore mentioned divided by 100 is the fineness modulus of the material. /s t. - The weights herein specified are for dry sand, pea gravel and gravel or broken stone. Provided any gsoisture is contained ?n said materials, the weight thereof must be deducted in order to cbtain the weights above specified for dry materials. The weights above specified for sand, pea gravel and @Tavel or broken stone are based upon a minimum specific gravity of 3.67 and a maximum of 2.69. To determine the weights of aggregate for the concrete mix when the specific gravity of the aggregate is different than the values mentioned, multiply the weights of aggregate above specified by the value 'IF" given in the following Table opposite the specific gravity of the aggregate: Specific Gravity of Aggregate 2.59 2.61 2.63 2.65 2.67 2.69 2.71 2.73 WEIGHING MATERIALS. value of F to 2.61 0.970 to 2.63 0.978 to 2.65 0.985 to 2.67 0.992 to 2.69 1.00 to 2.71 1.008 to 2.73 1.015 to 2.75 1.023 The sand, pea gravel and the gravel or broken stone shall be kept in separate bins, compartments or piles, and all of said materials shall be carefully weighed in the proportions specified by means of multiple beam or dial scales. The scales shall be set so that the gradings as actually obtained shall not be below the minimum nor above the maximum percentages herein specified. Cement in sacks as above specified shall be dumped directly into the skip of the mixer. The water necessary for every batch shall be accurately measured with an apparatus which will prevent the use of more water than herein specified. No mixer shall be used which is not provided with an accurate water meas- uring device or apparatus. DEPOSITING CONCRETE MATERIALS. For the construction of cement concrete pavement under these specifications, the Contractor will not be permitted to deposit or store any sand, pea gravel, gravel or broken stone directly on the subgrade, but the concrete materials, after being weighed, must be discharged directly into a truck or wagon and from there discharged directly into the skip of the concrete mixer. For the construction of cement concrete gutters, cement concrete sidewalk, cement concrete curb, reinforced concrete culverts, etc., the Contractor will be permitted to deposit or store concrete materials upon planks placed upon the subgrade provided that the planks are laid in such a manner that they are tight and will not permit the material of which the subgrade is composed to work up and become mixed with the concrete materials. When so stored, however, the various materials must be kept in separate piles as hereinbefore specified. MIXING CONCRETE. All mixing of Classes "A" , "B" and I•C" -lenient concrete shall be done in a batch mixer, equipped with a batch meter. The mixer shall be charged with cement and sufficient sand, pea gravel and gravel or broken stone to conform to the proportions hereinbefore stated. Sufficient water, not in excess of the quantity above specified shall be added to produce a plastic or quaking concrete which can be handled -without causing a separation of the coarse aggregate from the mortar. The mixer drum shall have a speed of not less than thirteen (13) revolutions per minute, and every batch of concrete shall be mixed in the drum of the mixer not less than sixty (60) seconds before any portion of th-- batch is discharged from the said drum. At least seventy-five (75) seconds must elapse between the placing of successive batches in the mixer. CONSISTENCY OF CONCRETE The concrete, after being mixed as hereinbefore specified, shall, when subjected to the following test, have a slump of not less than eight (8) per cent, nor more than twenty (20) per cent. The slump test shall be made in the following manner: The test tube to be used in making the slump test shall have an inside diameter of eight (8) inches at the base and an inside diameter of four (4) inches at the top, and a perpendicular height of twelve (12) inches. Immediately after the concrete has been mixed and deposited on the subgrade, a sufficient quantity thereof shall be placed in four layers in the tapered test tube until the con- crete is flush with the top of the tube, each layer shall be thor- oughly settled by working with a pointed iron rod. Then the test tube shall be lifted, allowing the concrete to settle or slump. After the pile of concrete has set one (1) minute, its height shall be measured and subtracted from the original height of twelve (12) inches, which difference in height is the amount of the slump in inches from which the percentage of slump shall be determined. TESTS OF CONCRETE The concrete composed of the materials, proportions, consistency, mixing etc., provided for in these specifications must be of such quality and character of workmanship that it will have an ultimate compressive strength of not less than 3,000 pounds per square inch, or an ultimate modulus of rupture of not less than 600 pounds per square inch, at the age of twenty-eight (28) days. The test specimen for determining compressive strenth shall consist of a cylinder of the concrete to be tested six inches in diameter, and twelve (12) inches in height. The test specimen for determining modulus of rupture shall consist of a beam of the concrete to be tested, six (6) inches in width, six (6) inches in thickness and thirty-six (36) inches in length. Samples of the concrete to be tested shall be taken immediately after the concrete has left the mixer and deposited on the subgrade and molded into the test specimens above mentioned. The concrete shall be thoroughly rodded and care taken to remove air pockets. The freshly made test specimen shall be struck off and troweled level with the top of the mold. The test specim-en, after molding, shall be covered to protect same from injury, and buried in damp sand, and at the end of forty-eight (46) hours the mold shall be removed and the test specimen covored with sand or earth and maintained in a continuous damp condition at a mean temperature of seventy (70) degrees Fahrenheit, for a period of twenty-eight (28) days, and then tested. The volume of cement for each cubic yard of Class "A" —i Class °B" Cement concrete in place, wiac_i proportioned as --beve specified, shall not be less than 5.90 cubic feet nor more Man 6.10 cubic feet. Ths volzne of ccErent for each cubic yard of Class"011 Cament concrete in place, when proportioned as above ;pccifi.ed, shall not be less than 6.40 cubic feet nor more Then b 60 cubic feet. A cubic foot of cement shall be considered as navins a weight of 94 pounds. RE -M, I`,TITG OF MO CRETE No concrete shall be used that shows evidence of having set, or that has beco;ae unfit for good work from: standing too long, or from. any other cause, and no re -nixing of concrete will be permitted. HAULING MIXED CONCRETE. No mixed concrete of any class shall be hauled for more than fifty (50) feet before being placed in the fo=is, or upon the subgrade. /Y. OEHENT 'MORTAR Cement mortar shall be composed of a mixture of one (1) part, by weight, of cement, and two (2) parts, by weight, of cement finish sand, as herein specified. The mortar shall be thoroughly mixed, either in a power mixer or bir hand, to a consistency which can be easily spread into position. The mortar shall be placed immediately after mixing, and in no case shall more than thirty (30) minutes elapse between the time the mortar is mixed and the time it is used in the cork. As soon as tide mortar has hardened it shall be covered with damp earth or burlap and kept wet continuously for seven (7) days, or until the structure in which it is used is backfilled. i9 CEMENT CONCRETE CURB. Cement concrete curb shall be constructed along such portion of the work and of the size and shape shown upon the plane .rd shall be placed upon a thoroughly dampened subgrade prepared ac herein described under the heading "SubgradeN. The concrete shall be composed of Class °B° concrete, ;s herein specified. Planks used for forms shall be of a width equal to the (Lcpth of the curb and shall be two (2) inches in thickness. Warped planks and planks not having a smooth, straight upper edge shall not be used: The curb planks shall be rigidly held in -)lace by the use of not,less than eight (8) pairs of iron stakes o each twenty-one (21) foot section of curb. All curb forms must be carefully set to proper alignment and grade. All forms shall be thoroughly cleaned each day and coated with a light oil as often as necessary to prevent the concrete from adhering to them. Both back and front forms for curb returns shall be of rigid construction. The concrete shall be thoroughly spaded a-.vay from the forms with a spade or similar tamping tool until there are no rock pockets at either form. The front form shall not be removed in less than two (2) hours or more than six (E) hours. Immediately after stripping the forms, the curb shall be troweled. Grouting composed of one (1) part of cement to one (1) part of finish mortar sand shall then be applied to the top and face of the curb by means of a brush. The curb shall then be troweled smooth, edged on top and jointed at not less than three (3) foot, nor more than four (4) foot intervals. The front and back edges of the top of the curb shall be rounded to a radius of approximately one-half (1/2) inch. EXPANSION JOINTS. The curb s: all be divided into sections not less than eighteen (18) nor more than twenty (20) feet in length. These sections shall be separated completely by a joint not less than three-eighths (3/8) inch, nor more than one-half (1/2) inch in width. The joint shall extend to the full depth and width of the curb. Expansion joints shall be placed at the ends of all returns and where curbs join old curbs or other structures. The joints shall be filled with sections of expansion joint filler as herein specified. The sections of filler shall be cut to a cross section two (2) inches wider than the cross section of the curb and equal to the height of the curb. PROTECTION. The curb shall be completely covered with earth or sand as soon as the concrete has set sufficiently to permit this to be done without injuring or marring the surface, and shall ren;ai:: covered and be kept wet continuously for ten (10) days. ZD CEMENT CONCRETE SIDEIRIAIZ Cement concrete sidewalk shall be constructed along such portions of the work and of the size and shape shown upon the plans. It shall be placed upon a thoroughly dampened subgrade, prepared as hereinbefore described under the heading "Subgrade". The concrete sidewalk shall be composed of Class "C" cement concrete, as herein specified. The thickness of the sidewalk, after completion, shall be three and one-half (3 1/2) inches, unless otherwise shown upon the plans. After the concrete has been placed between the forms, it shall be struck off with a steel shod straight edge. It shall then bU tamped with a heavy tamper until at least one-half (1/2) inch of mortar has been brought to the surface. The concrete shall then be tamped or struck off in such a manner that no irregularities will be left in the mortar surface. The surface of the walk shall be well floated and thmroughly and smoothly troweled, after which it shall be smoothly polished. The finished work shall show an even and true surface, free from sas, humps, pits or other defects. When a straight edge five (5� feet in length is laid upon the surface at any point except at glade chap es, the surface shall at no point vary more than one-fourth (1/4) of an inch from the true edge of the straight edge. The application of neat cement to the surface in order to hasten hardening is prohibited. Both edges of the sidewalk shall be rounded with an edging tool having a radius of one-half (1/2) of an inch. whenever the sidewalk is laid on a grade of five (5) per cent, or more, it shall be finished with a wood float finish. Whenever the sidewalk constructed under these specifica- tions does not cover the entire sidewalk space, such uncovered portion shall be brought to grade and left in a finished condition, CONTRACTOR'S NAME STAMP. The Contractor shall stamp his name on all work done by him at intervals of not more than one hundred (100) feet, on continuous work, and not less than once on each job of less than one hundred (100) feet in length. The letters shall not be smaller than three-fourths (3/4) of an inch in height, and of proportional width. They must be sunken and of a depth of not less than one- fourth (1/4) of an inch. FORMS . Forms shall be true and straight, free from warp, and of sufficient strength to resist springing out of shape. All mortar and dirt shall be removed fro: -,i forms that have been previously used. The forms small be well staked o.- (;tiherwise held to the established line and grade, and their upper SuT:`ace shall ccnforr; with the finished surface of the concrete sidewalk. All forms shall be thoroughly w;'t, before any material is deposited against them. Strips used as forms at the sides of the walk shall be not less than one and three-fourths (1 3/4) inches in width, nor less than three and one-half (3 1/2) inches in.depth. LARKING AND EXPANSION JOINTS. The surface of the sidewalk shall be divided into sections not less than three (3) feet nor more than four (4) feet in length, measured along the sidewalk parallel to the street lines. These sections shall be marked with a jointer, at least one-quarter (11:4) inch in depth, along lines at right angles to the sidewalk. At not less than every fifteen (15) feet, nor more than every twenty (20) feet in length, or at every fifth (5th) section, the section of sidewalk shall be completely separated from the adjacent section by a joint one-half (1/2) of an inch in width. These joints shall be formed with a rigid template of a size equal to the full width and depth of the sidewalk and set at right angles to the edges of the sidewalk. The edges of the joint shall be rounded with an edging tool having a radius of one-half (1/2) of an inch. At all radius returns the sidewalk shall be completely separated from the curb, from the beginning of the curve to the end of the curve, by an expansion joint one-half (1/2) of an inch in width. After the troweling and polishing of the top surface of the sidewalk has been completed, the above mentioned joints shall be filled with strips of expansion joint filler as herein specified. The width of these strips of filler shall be one-half (1/2) inch less than the thickness of the sidewalk. PROTECTION. When completed, the sidewalk shall be covered with earth or sand to a depth of not less than one (1) inch, and kept covered and wet continuously for a period of not less than ten (10) days. ate.. CEMENT CONCRETE DRIVEWAYS Cement concrete driveways shall -be constructed Olong such portion of the work and of the dimensions shown upon the plans, profiles and cross sections hereinbefore referred to. The said cement concfete driveways shall be placed upon a thoroughly dampened subgrade prepared as hereinbefore described under the heading "Subgrade" . d. 1 The concrete for the construction of cement concrete l�shall be of Class "Au, cement concrete, as herein specified. FORMS. Forms for driveways, if of wood, shall not be less than one and three-fourths (1 3/4) inches in thickness, and shall extend to the full depth of the driveway. They shall be true and straight, free from warp, and shall be well staked or otherwise held to the established line and grade, and their upper surface shall conform to the finished surface of the cement concrete driveway. All mortar and dirt shall be removed from forms that have been previously used, and they shall be thoroughly wet before any material is deposited against them. PLACING AND FINISHING CONCRETE. Concrete shall be spread and struck off in such a manner that when tamped and finished the thickness shall in no place be less than specified. The concrete shall be tamped until its surface is covered with sufficient mortar to.permit finishing. The driveway shall be brought to a true. and even grade and a smooth surface. The.outside.edge of the driveway shall be rounded with an edging tool having a radius of one (1) inch. PROTECTION AND CURING. when completed, the driveway shall, as soon as the concrete has set, be covered with not less than two (2) inches of earth or sand and kept moist continuously for at least ten (10) days after completion,'and it must be protected from traffic for 4t least fourteen (14) days. GENERAL REQUIREMENTS WORK The Contractor shall, for the price bid, furnish all -che iaterials to execute the work in every respect in a thorou;;il and workmanlike manner, in accordance with -c1-.e plans and specifi-- �ations, and to the satisfactiion of the Superintendent of Streets, MTEF IALS AISD S -PLES All .nate ials must be of specified que.lity and fully equal to the samples, when samples are required. Ti=e Contractor shall furnish to the en;jneer for test, 7menever called for and free of charge, samples of all materials proposed. to be used in the work, and he shall notify the engineer as to the source of supply of all such Materials proposed to be used not later than ten (10) days before comyr•.oncing the 7or1:. Rejected material iust be i= ediately removed from the cork by the Contractor. LABOR Any overseer, superintendent, laborer or other person employed by the Contractor on the work, who shall perform work in a manner contrary to these specifications, shall be discharged Li,mediately and such person shall not again be employed on the work. EXAMINATION OF GROUND Bidders must examine and judge for themselves as to the location of tho proposed work, and the nature of the excavation to be made and the work to be done. SETTING STAKES. The Contractor shall give 24 hours notice in writing when he will require the services of the Engineer for laying out any portion of the work_. He shall dig all stake holes necessary to give lines and levels. The Contractor shall preserve all stakes set for the lines, levels or :,:easurements of the work in their proper places until authorized to remove them by the Engineer, and any expense incurred in replacing said stakes which the Contractor or his subordinates may have failed to preserve shall be borne by the Contractor. PLANS AND SPECIFICATIONS. The Contractor stall keep upon the work a copy of the plans and specifications, and access thereto shall at all times be accorded the Engineer or Inspector. INSPECTORS. The Contractor shall prosecute work only in the presence of the Engineer or Superintendent of Streets and any work done in the absence of said Engineer or Superintendent will be subject to reflection. The Contractor shall furnish the Engineer and Superin- tendent reasonable facilities for obtrining, such information as may be necessary to give them full informEtion at all times respecting the progress and manner of the work and the character of the materials. PRESERVATION OF MOMMENTS. The Contractor shoal not disturb any monuments or stakes found on the line of improvements, until ordered by the 'En.incer, and he shall bear the expense of re-settinE any m,�)n tents or st-:— which may be disturbed without orders. .�2V REYOTiING OBSTRUCTIONS. The Contractor shall remove all trees, stones, debris ,nn other obstructions that may be encountered in making said -.:movements. OBSERVING CITY ORDI14ANCES . The Contractor shall observe all the Ordinances of the City in relation to the obstruction of streets, keeping open passageways and protectine, the seme where they are exposed or dangerous to travel. BARRIERS, LIGHTS, ETC. The 0on%TVCtOr shall take all necessary measures to protect the work and prevent accidents durinE construction. 'He shall maintain and provide all necessary barriers, guards, temporary bridges, wetphmen and lights. PUBDC U'�II,TT�IE'S . In case it should be necessary to xove the property of any owner of a public utility or franchise, such owner will, upon proper application by the Contractor, be notified by the Superintendent of Tork to move such property within a specified reasonable time, and the Contractor shall not interfere with said property until after the expiration of the time specified. The right is reserved to the owners of public utilities and franchises to enter upon the street for the purpose of making repairs or changes of their property that may be made necessary by the work. The City shall also have the privilege of entering upon the street for the purpose of repairing culverts or storm drains. LOSS OR DAMAGE. All loss or dema6e arising from any unforseen obstruction or difficulties, either natural or artificial, which may be en- countered in the prosecution of the work, or from any action of the elements, or from any act or omission not authorized by these specifications, on the part of the Contractor, or any agent or person employed by him, shell be sustained by the Contractor. DEFECTIVE WORK. No work which may be defective in its construction or deficient in any of the requirements of these specifications will be considered as accepted in consequence of the failure of any officer of the City, Engineer or Superintendent connected with the work, to point out said defect or deficiency durinb construction, and the Contractor shall correct any imperfect work, whenever dis- covered, before the final acceptance of the .work. PROTECTION OF 'CORK AND CLEANING UP The Contractor shall care for all work until final completion and acceptance. He shell remove ell surplus material and rubbish from the work after its completion, end before he makes application for the acceptance of the work. FINAL INSPECTION Streets The Contractor shall notify the Superintendent of when he desires a final inspection of the work, when tl:e latter *ill, as soon as possible, :.sake the necessary es^ in tion, ..r., i the work is found. in compliance mith these specifications, the Superintendent -ill furnish the Contractor with e certific^tc to that effect. �f AL:,OWABLE VARIATION When in these specificatim-is a maximum or mini-zLm, in size, percentage or thickness, or relating to qualit c c':aructer, or other matter, is allowed or preocribed, the Mcrk chal l be accepted as in compliance therewith if within such nax_r.um or minimum so alloyed hereby. DEFINITIONS whenever the word "City" is used in these specifications it refers to the City of Azusa, California. 7lIhenever the word "Contractorlt is used in these specifications, it refers to the party or parties of the second part in the agreement for the construction of the work herein specified. isr .henever the words ('Superintendent of Streets" or "Engineer" are used in these specifications, they refer respec- tively to the "Superintendent of Streets" or "City Engineer's of the City of Azusa, and their authorized agents or inspectors. The City.Clerk shall certify to the passage of this Resolution and shall cause the same to be entered in the Book of Resolutions and a minute of the passage thereof in the Records of the City Council of the meeting at which said Resolution was passed. passed and approved this day of December, 1929. Mayor ATTEST: lel City Cle STATE OF CALIFORNIA ) COUNTY OF LOS ANGELES ) ss. CITY OF AZUSA I) I, City Clerk of the City of Azusa, do here certify that the foregoing Resolution, being Resolution No. IZ.?o , was adopted by the City Council of said City, signed by.the Mayor of said City and attested,by the City Clerk all at a regularreting thereof held on.the .day of �✓�� , 1929, and that the same was passed by the following vote, to—wit: ) AYES, Councilmen,ti�! NOES, Councilmen', ABSENT, Councilmen; City Clerk of the Cit of Azusa.