1957 566 Ordinance - Laserfiche WebLink

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i4linimum cement, bags per 1 cu.. ord. of concrete 6-1/2 P;aximum water, gallons per bag of cement 51/2 ;Iinimu_m compressive strength, lb. per s~. in. at, ?_8 days 3,500 Proportion bar volume, cement . to total a.ggre~;ate 1 to 5-1/~. The ;nrei~;hts in pounds of dry a~;~;regates per sack (9~ lbs.) of Air-En- -i:r. a_~.n ~_~1~r ?ortland Cement sha11 be as follol^rs Fine AgL;regate Coarse Aggregate Total Limestone lE0 lbs . 300 1bs . x.80 lbs . 57_ag 195 lbs . 2t~~ lbs . ).~G.O lbs . `the ti^rei~hts used in the above table of a~~;ro~~:ltes are t~a.sed en specific grava_ties of 2.65 for sand and limestone a.nd of 2.30 f'or .sla.b, ",".he slump range :gin inches, stlall be not lF~ss ~tiz.nn 2 inches nor more t.}~^.n 3 inches r~rheYl 17_Yll3lied b~,r o:cdinary- ;nethocs and sh~"~..11 be not le 7s ~,har. 1 i ~~cl~. r. or moxa ~_..::,.:~_ 1-1% incY 35 Vfllell fin~S'rled by t1Se O:f a Z1'ib~ a~~lil>> 111-+ ,'_rtl~l° • Slr~.rc..l) Sila.7.7. ~be ile~erm.:L'ae~7. ~.1 Fz.'.(:OrCl.A.nce ~~Jit11 Stc111d<:>.T'Ci 1":e-thoc OT. ~cl717i17.i) ~`.a.$t f~r1' ~Or'_° S-~stPT1Cy ~n :k'c?:'t7.ana. lieAle-P.t COriOrete, 1"11:(;riCan ::O^.let~J' :for `!"eSti'_1{; Z~~a'~~e~~ 1aiE PesiGna+,ion C lid." . (e) COi`1CRE^1E. "i.ES`l~' Si'~~;Cii~.-i~:e~S: T'~i~~ test cylinc?ers, F~ in.ches ir. ~lia~aeter and 12 inches nigh shall be m<~.d.e frorE each 2000 square y<;rds of p=~~~re*r:~n:: or :f r.^.ct~_on ' •theieof, p13CP,d e8Ci1 (-~~'~ frOn1 CO?.CY'ete t~$iCh Z. t~e'1_n 1nCOr~~Cr~lte;i, l`1 t~:1F j~!iC•'"•<, i~' so ordered by the Enginee-^. These cylinders s11~.i7.:L be m~~de 4nd te•:tecl by a reputahl.e laborator~T selecte:~. by tre i~~n~:~necr, sl1 X1.1 be rna.de 7_n acc o:r~~a.ni~a ~ ~~ ch Stand3rcl Iethod cf l:aking and Storin Compression Test Sneoin?e^s (~:~ '~'(.11aT'~'i-.e ir_ the Field; A.c,T.P.'. Desination C 3?., ^rld tilell tested in ~.ccord~~n~o ~~J:~:t•1z . Starclard 1:?etllod of 'l`est :for L'om?:~ressive S~F~r~~rlgtYl of i~.:ol~:3ed Cor!cre~L'e Cy-y~_zider;: A. S.T.1:~. JJeSlj~;na.tiOn C 39. The ?:'1lli1nilli! C(~1'~l?~T'P,SS7ve Strel1~t11 Of C01'?CY'e'L-e ct'i: tvrenty-eight (2~) da~~s s'ilrtll be 3, X00 sounds ne?' scl?aa.:ti•e inch. Contractors sha.J.:~ pay all costs for such tests. (f) T'E'L Ol, COidC1LJa'Tl~: Gnly ready-mixed. concre ~e _^r.'! 11 be usod ^nd al7_ovrod. in. the concrete ;~avrrnent. Ln this operation the cement, sand and liriestono or s7 a~~ sha11 be loaded and mixed ~~rith ~~r~.ter added.. :'~11 ccnc~°ete shall be thor•eL:;l=~ly mixed in a batch type mixer of approved type for a.t least one and one-h~~ (1--1/?_) minut(~s. Only enough water shall be u5ec1 to secure hydra~~a_or~ ar.:l. *~!'.o b^tch shall be the stiffest ~~:i.x possible to secure ~~rorkability. The Concre;o 1'rl7.en placed. shcr.'ll be of uniform a.na ~nrortcable col~.sistency and in no case ;..z-x.17. the slump be less than 2 inches nor more than 3 inches except ~;ahe'z vbr,?~irg machines are used in ;rrhi ch c~'lse the slu°ap sha.11 be not 7_ess th.^.n 1 inch r_:;' mo~~^ than 1--1/2 inch. The concrete mixture shal7~ be transported to the site of '.""^.rorlc in p~r~~ a~~le type mixers mounted on motor trucks. The maxim, device shall be operated so u.. to revolve at the rate of i'rom 12 to 2)Y revolutions Ter aninute. There sha.J_i ba no segregation of the mixed concrete 1FJhen it, is delivered or. the site of 1~oi•k. Concrete shall be mixed not to exceed one (1} hov-r before placin, unless otherTrJise perlnittecl by -the Y.'ngineer. Tf ordered by Engineer, Contractor must provide plar~cing over Z~rhich tre concrete mixer trucks can bacl: over the prep~lred sub~,r~ade. pxly rutting of the sub~;rade must be repaired by reshaping surface, Filling any depressions with fine granulated sly:.g or slag screenings and then thoroughly rolling to firm conlpaetion. C~~-3