1963 825 Ordinance - Laserfiche WebLink

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form this intermediate transverse joint shall not be used. Before any reinforcing fabric.. is placed the concrete shall be struc'_, off so -Chat its surface Drill conform to a surface parallel vaitll and 2 inches bclorr the finisl~led surface of the pavement. On this surface the y~telded ~Jra_re fabric reinforcement shall be placed and se securel;T held that it shall remain to a uniform depth o:f 2 inches belol.r the finished surface during the placing of tho subsequent concrete. Ilnmedia.tely after the placing of the ~,~elded trrire a'pric reinforcement the top 2 inches of concrete shall be placed; and in no event sh~,:~~~_ more tl~~an I~5 minutes elapse bet,rTeen the placing of the contr. e~te belo~^r the rea_n• force~nent a.ncl that above the reinforcement. Sufficient concrete shall be usec'. so i.;hat after being thoroughly consolidated by ta?nning, rw:~~r_i?:g, machine or haT d finishing, as hereinafter specified, the concrete sha±_l have a deL~th of a.t 7_ea~~t the thickness sho~~~n on the plans o~° pro~r~osal. (1) 1'.~a!1CHr~?E l~INISF?IidG: Unless other~~rise specif'~_ed or l~ermitt~od, grid ir2~~edi~ttel~r after the concrete is placed, the surface of tl~e cor_c_~ete s4l<<ll be 'arougY_t to ~~he proper ~;ra.de and croti~n a.nd tl~orougl~l~ co?:~pacted by a rlechar.~ical, self-prOJn11ec1 finishing machine of the type approved by the Engineer a.r`xd .nesting therequir~o- ments of Section CL-9 of the Constr. u::ti on a.nd 'i'~.l«te_'y~.~ S~ec-~:~ _catioizs o~' the Ghi o Department o.f I-Iigl-i.~ra.;rs, a co;;~ of .~~rha.ch i.s on file in the Gff i ce of the Engineer. T'a'le finishing m2.C.':lTle ~,h.al.l be operated over esch sec+4~i on of the p~:ve..l~_.izt tl'r0 Or more tltneS ~.'.nCi u,t SL1C11 lnterva~.S a.S are regL7.l.-C('.d 'i:0 r)r OduCG the S;~eCl:~'1.E'.Ci results. During t'•ze operation of tri'ring off the col?crete surface, a unifox_~n ridge of concrete ~3ppro;~imately 3 inches in de;oth sh~^.11 be l:~aintained ahead of the stri!~c:-off' for a_ts entire ~~~ridth. The finishin machins shall not be operatd beyond the point ,~r].zere the 3 inch clel:rth of the surplus concrete can be ntain- tained except -crhere necessary .in maka_ng joi-rts. .After the first operation of tl:e f'in~isl~ing macl-lane, r,.dditional concrete shall be added as required, porous spots sh.a11 be rsdrassod, a.nd the surface re- struck by the finishing inacl-line. Porous spots shall not be eliminated 'oy tamping, or grouting . The elevation and arrangement of the strike-off and. screa.ds shall be such that a finished. ~?~tvement having; the spec~.fi~~d cro~s?n anti thiclness T~?ill be se- cure c1. The concrete adjacent to transverse joints sl~a.l1 Yee thoroughly co~r_pactec. by means of an approved irterna.l vibrator. The vibrators ?iced for this purpcr~ shall be of the pneumatic, ~;as-driven, or electric -t;-pe and shall be o~~er~te~t ~_ a frequency of not less than 3200 pulsations per rril.:ute. r'.t the tans the con- crete is placed and spread, it shall be thorou~,hl._y s adt:d and vibrated a.t the forms, curls, bul?cheacls, center. joints and elset~rhere unless otherwise spec_ifiecl or permitted. The surface of the concrete shall be tested before the final belta_n~;, using an approved stand,:ird straight-edge, 10 f..eet in length, and a. ~.;empla-te cut to the proper section. Irregularities exceeding; 1./?~ inch shall be corrected before the initial set ha.s clevelopeci in t'rle concrete. After the comp~~ctasg of tho concrete and tirhen th.e surface ha.s been brought to the proper grade, cross-section and smoothness, it shall be finished by the use of a canvas or rubber belt, or a thin ~:~ooden board nGt less than 8 inches in width anti approximately one foot shorter than th.e ~•ri:,'.th o:C +„he pavement slab. The fi.nish:t.ng belt ma,,r be either hand or rnechanic~~lly opora~tecl. The fin- ishing belt o.r board. shall be i~ro.rlced 1^rith cross~r~ise and. 1on~;i-tud.inzl motion until all surface irreg ularii~ies a.re eliminated and all s~~rplus crater removed. Care sYlall be observed in the use of tl?c finishing belt or board not to perritit the edges to dig into the surface of tl~le concrete or to l^rorl--: the crown out of the cP 5