1957 566 Ordinance - Laserfiche WebLink

Home Browse Search

pavement. The finished surface of the concrete shall not var~r?~ore than 1/!~ inch from the specified contour.. In rainy tveatller the concrete shall be pro- tected as soon as it is finished ~rrith canvas .supported above the surface of tl-1e p;IVement. As 50017 as the concre'r,e has hardened sux"ficiently the edges of the 1oni- trdinal, construction and ecpansion joints shall be carefully finished vrith an ~Cl`7.ng t001 h8'Ving a ra.rlius o.f 1/~. inch except as ot,her?;,Tisc directed. !?u; B1ZOO;.I )i lF~?ISH: After edging the joints has Ueen_ completed and before concrste 1~.~.s had its initial set, the surface of the p^vement shall be given a broom finish. The broom sha11 be of an approved type,'no~t less than 18 inches in v;idth of fiber or flat v~~ire not mor. e t.la.an. 5 ?_n.ches in leng+.,h. The strokes shall be from center to edge of slab, one stroke per vridth of broom, v,~i.th adjacent stz~okas slightly overlapped. The broom shall be operated so as not to tear t';e ce•~ZCrete as to produce regular carruvation not over 1/v inches in depth. The surface of the concrete, ~:~fter completion of the brooming, shall be uniform in zppearanee a.ncl shall be to t,Yle spee_i..fied grade,- elevation and ec::^~-,our~ 7_~ sha11 bef.rsn from surrlus tiF,rater, rouL;h or porous shots, irre~ul^rit.ies c cte~ressior~s aI:•a any objection4.Ule features resulting; from the operatics of 'l:he bro om . (n) SUI%FACE GAUGE: Tl~e top surface of concrete pa.vernent must conform -~v~.th a template having the c~::inber shoN.m on cross section plan for improvemer_t; the template must be set rri.th reference to forms o~~ cur.~os and be supported upon them ?.mile in use. Tl~e setting of subgrade a.nd suri's.ca tem.~;lates must Ue chncrcec~ Icy ~t~{.111~?' gutters, center of pavement and intermedir-ate poir_ts every 2 feet for concrete depth, using cua~b or form for grade and placing sta'.~es to indicate fell thi.clcness of concrete. The finisY~ed surface of the concr~:te pa.ver:,ent shall not vary ~:?o-re than 1/~ inch :from the specified contour nor rno-re than 1/~;, inch vrhen tested ~~ra.th a. ~texz foot str?ight edge laid a~•?rallel to t:~~o center line of pavement. T_°re~ular. ities e~:ePed7.n~ 1/?~ inch shall be immediately corrected. All depressions or pro- jec`~ions discovered shah be corrected before initial set has developed in the concrete. (o) IinN~ FIAI:iSHTNG: '.':!hen specifical7_y permitted by the Engineer, the concrete p~zTement may be finished and brou~l-~t to the proper cro?;^.-~ ar~cl ~r~.de bT the us of a strike-board or template. Zm_mediately after the concrete is pl<~ced i•t sl-~.~.1 be thoro;zghly consolidated by ramming, using iron faced. tarnpors of a,pl~ro.~^a':,al~T 36 square inches in surface area and ti~eiglling not less thtin ~r0 ~~ouvlds. 1'lxc :~c~•- crete sha.11 then be finished a.ncl :;o;zcrete thoreu~hl~, corlp~:cted. U~~ ta.n?tin; ?°:i-~h a heavy, steel-shod tirloaden terapla.te and the entire surface shall be ?;corked ever until a. uniform consolidation is obtained. after the eor~pr:~eting of the conc_~et^-. has been completed, the strilL~ing template shall Ue ope?^^ ted ~'or?°ra;rd ?~•ith c-z com- bined longitudinal and transverse motion, ?~~ritllout rais~_ng ei~i,her end o:°f the side forms, produci-ng an even surface true to line a.ncl ;trade. The surface shall then be finished as specified <:•.bove under (m) Broom Y~'inish. (p) CUE?iVG: ?~Jitl~iin one hour a~'ter concrete has Ueen tamped and gua~;ed for cross section and longitudinall~j the Contr~:ctor shall cover surface Frith heavy burlap or canvas and keep such protective covering in ~~lace and yell moistened for at least ?~ hours. The concrete surface sl:.all be kept damp by spraying ,^ritiz z+rater after ~ :00 r.l.i. each da~r for one TrJeelc after 'the concrete has been laid. I`ornoon spraying ~^rill be ordered for the f9.rst three (3) days if. it is hot and dry. No traffic shall be permitted uncn surface of concrete pa.ve~nent for seven (7) days after base has been laid. The Contractor must :na.intain s?zitable and adequate CP-G