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<br />^hall be discarded.. Under no circumstances shall concrete be used that has pr.
<br />iaJ_lr set and the re-mixing of such _:laterials is 1?rohibited. The concrete s1-!a7.1
<br />be deposited bet~rreen bulkheads of a uri:f'orrn tl~!ic'.~cness and to the fu7_l depth. a.nd
<br />~7:~idth of the vral'.~c, irregular or sloping; surfaces shall be avoided . The concrete
<br />after. be:~n~; placed shall be thoroughly co~npa cted and 'orough.t to 'tlle proper pitc'_n
<br />and. grade ~"rith a templet or stra~.ght edge.
<br />Ir~~unedia.tely prior to the finishing of the surface, the ~Prx7'~ shal_1_ be cut
<br />into slabs not longe'F• than six feet on <Zr_y one side. The joints shall be cut
<br />through the full thickness of the rra7.k anal the opening so rna.de s?1x17. be f i l.lcd
<br />~rTi.th c1e~n, dry sand well rammed into p7-c,.ce. The joints s1~a11 be formed by a
<br />cutting tool or other tt!eans satisfac'tcr~~ to the Eng;:i.neer. The markings in the
<br />surface of the ti•r;llr at trese joints sh4.11 not be more than one-fourth inch deep.
<br />A17_ edges shall be rcuncted za; tri arA approved ectgin~; 'tool to a ra.d_i.us of one-
<br />fourth inch.
<br />7. S7JRF.PCL FIiJISH: The finish7:n~; of the r}rall~ shall i?nmediately follo~r the placing
<br />and conpa.cting of the concrete. Tinless ot'rer~^rise ordered by the Engineer, a
<br />finish -oroduced by rubbing ;~rith y~rood flo~.ts T~ri7.1 be requi~^ed. Th.e surface shall
<br />be free from depressions or inectu^.lities . 'i'he application of dry cement to
<br />hasten drying; of the surface is pz°chibited.
<br />B~ CiTJ'7.IP1G At`•ID PRO'?'LCTIJVTC3: Tn ~^ainy ~rreather, ±he concrete shall be protected ~~.s soon
<br />as it is finished. In hot or dry ti~reather, the Contrs.ctor shall 1<_eep the concrete
<br />vret. Si~rinl~l7_n~; shall be begun as soon G.s the concrete; is set suf.i iciently to
<br />prevent pitting, a-r..d s?14111 be continued at such intervals a.s the ~ureatllcr condi-
<br />tions ma.y require, or. the E1i~;ineer may direct.
<br />;. EXl'.l-il\iSIOi:T JOli`IS: -Preparec.~ strilas of bitunen and fiber or miner~~.l aggregate,
<br />shall be placed i?~ concreto 1rra1'~s at intervals of a.t least t;~~renty feet, also at
<br />ends vrhere the ~~:~a.7.]:c ::.buts Ci'.rb:i.n, or otiler lateral ~:~,~al'~,, ~~.n~a aloe;; the building
<br />line ~~rhere the r-alk is laid full ~~~,*i dth ~"rom ti?e curb to t're oui:Ldi!1~ or other
<br />s.truct;ures. Sir:!ilar joints sha11 be placed ^round ,rater-meter covers, gas boxes,
<br />hydrants, l~~mp standards a,° o-~l~.er fired objects projecting through the ,~ra7rc. All
<br />strips stall be one-fourth inch ~.n i~hiclrness, except for transverse joints ~nrhen
<br />the temperature is belot-r 70° !'r?hrenl!cit, in ~;~rhi_ch event t'i1e str~.ps sha.l7_ be or{e-
<br />half inch in thickness. `1"iie top of t'_ne strip shall 'os cut o.f'f flush. ~°tit'.~ the top
<br />of the concrete.
<br />10. "rORK IN F1_~,E?sTi~TG '-~~.4T1-l~.rt: Unless other_T~;-ise specif ~_ed., concrete ;^rhen dri~ositec<
<br />Shall have a te;_~:;~er. ai.urc of not 7_ess t'^an ~0 de~re~:S Fc-]hrenhPlt, nor more than
<br />11~ ciegrees F?.hrenhe_t. :Cn ~:reezin~; ~^reather, suitable means sh^.11 be provided
<br />for maintaiz-~.inL the concrete ut ~,. temperature of ~5 def;rec=.s I'ahrenl!eit for a
<br />period of not lsss tha:a seven (7j days.
<br />Constr.~_zction must stop i f tho temperature fa7.J.s to ~6 derees Fahrenheit.
<br />ido frozen r~tc:rials shall be ~?sed. in the concrete nor s1_.~.7.1 concrete be laid on
<br />.f'rczen. ;;round. :'.ny toner^tp ~~.~'r~:i_ch '-'?a~ be d.a;nagect 'oy Frost action shall be re-
<br />placed by the Contractor a.t %1is c:~n1 e:cl~ense.
<br />11. COiVCI~~'E TEST SP'=~,CL ~E; ~,S : T~rro t~s-t c}rl.ir :J.ers, ~5 inches in di ameter a.nd 7.2 inches
<br />111;11 Si1al1 be YIl•^.C~e i'~7C'_ !:l ',y 'Y';~?-.1 C~,r:^_•~-t;~ ~,,;rll!_Cl2 15 }J2inE~; :~n(:^.~r_~orclted ~T]. tl'].E' i~'forl{,
<br />if so ordered b~T the; E!1C;i~!eer. These c~Tlinders si_; li be ~'iacie and. te.,tea by a
<br />reputable labor-~tor~~~ s~•1 ~~~ted by 'the Ln~ireer, sh~7.1 ,,,P r:.~ .7.' in a ccordailce ~rrith
<br />Standard l~:iethod of i+:~:;.'.t_~.n ; a1d Stori?1~; Compression `~' ~,S-v •i.n,~.L'•1ci1,G. of COncret.°. In
<br />the Field, A. S. T. ~'. Les:; ~a:~~.ti.oil C 31, a.nd then tes ,~c : i:1 ~~ ^c,~r. dance ~~rith S't^:1c«zrd
<br />P:'etllod of Test for Conr~_ressive Strength of %~olcted (,o_1cr~tc G°linde_rs, A.S,~!'.1',
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