1963 825 Ordinance - Laserfiche WebLink

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• Passing 3/8" Square sieve from 35/ ~to 65 Passing IIo. ~. sieve from Ui to 15i 3. T:i~: Concrete sidevrall{ shall be cast of Ready I~ix Concrete consisting of a mi~;ture of .'fir-Entraining Portland Cement, limestone coarse a.~;greoa.te, sand and ~va.ter, proportioned in accordance with the requirements of •this specification. Cer~lent shall be measured by w4~ight and sha11 be Z~Je~.ghe 1 on a. balm?c~ or scale separate from those used to weigh the other ingredier_•cs, AggrPg?tes sha11 be mea.sared by rrc:ight. Batch vtreights sha11 be based on suria.ce ciriad. m~~te.ria.ls and sha.11 be corrected to tape into account the ~~Jeit;ht of sure ice ~tJa.•ter con- tained. in -Li?e a.ggrega.tes. 'r4'ater sh^.11 be me<~.:.su.red b;~• voltn.a Gr ~r,ei.&ht. Total or maximu:•n Vrater shall be considered a.s that including adcad ~^aater a.zi:i absorbed (surface) ~-rater in a.gsregates. Concrete shall be Class "C" - Oh.;_o State i-iigl~~j„ay Speci fica.tions and sha11 be proport:i,oned as f_ollo~rrs .Iinimum cement, bags per 1 cu. ;yd. of concrete 6.3 r Pta~,:unum vrater, gallo.?s 'oer ba.g or certent 6,2ti i~.2inirnum compressive strength, 1'0. per sr. in. at 28 days 3,500 The UJei~hts in pounds of d.ry aggree.^tes per sack (9~. lbs .) of Air-Entrained Portland Cement sha11 be as folloti~~s Fine Agr:regate Coarse ~.ggregate Total Limestone 190 1'os . 295 lbs . ~.~5 lbs . The ~~~ei,hts usr:d in the above table o_~: aggregates are teased on specific gravities o.f 2_.65 fox' sand and limestone. ~. I:7IkIPJG lu'~D TR.«PISPCRTING: In this operation the cement, sand and limestone shall be loaded and mixed Frith vrater added. All concrete shall be •thoroughly mixed in a batch type mi_Yer of approved t~rpe for at lcas-t one anc. ono-•ha.1f {1=1/2} minutes. Only enough ~-~rater shall be used to secure lZrdration end the batch shall be the stiffest mix possible to secure ~r~ror'.~ability. The concrete z~rher? placed shall be .of uniform and vrork~ble consistency and in nc case sha.il. the slunip be less than 2 inches nor mo_~e than 5 inches. Slump shall be. determined in accord- ance v~4~ith Standarci i:eti?od of S]_u~np Test for Consistency in 1 ortland Cement Con- crete, American Society for Testing; I~;~a_terials, Designation C-1!~3. The concrete mi;Yture shall be transported to the site in portable type mixers mounted on :?rotor truct_cs. The r~,ixing device ,^,??a.ll be so operated so as to revolve at the rate ~of from tvrelve (12) to ~;~~ren-ty-four (21+) -revolutions leer minute. There shall be no segregation of the :^li~ecl. concrete z~rhen it is delivered on the site. 5. FC.l~,%:IS: Concrete sha.l.l be deposited in clean steel foz_ns adequately braced to prevent distortion from the specified dimensions. Steel forms shall be used on all straight sections of sidevJalk with the exception of sinr;le five foot sec- tions where V~road forms grill k?e permitted. j~Iooc'. forms mu~.y a1.so be used oiz spacial curved sections. All forms shall be subject to the a~~proval of the Engineer and sh,~~11 be of a. size sufficient to produce a. ~;rall;: of a mini~iiwn •thick- ness or depth o:E' four inches. , 6. PL".CING COT~IC~'FTE: `i'he concrete sha]_l be ti?orour;hly tar°~ped a~?d consolidated so that none of the stone ;:~~pea.rs on the surface. Th.e for:;~s ?rust be lce;?t clean and shall be coated v~iith a. suitable oil before fi13..in~ 1F:~ith cone?°~te. Foundation beds shall be sprinkled itn:ne:diately prior to depositing tl?e concrete. Concrete ~~~rhen mixed shall be rapidly de~:~ositeca in tl~e forms and any con- crete not in final position. ~~rithin thirty minutes :~1'.ter co:ripletion of the mixing S?~;-2