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�u <br />It shall contain not less than 99f bi�umen soluble in cold carbon <br />disulphide, <br />It shall be insoluble in �vater, dtLlute acids and alkali. <br />53•--DOWEL PINS: <br />Steel Dowel Pins ti��ill be placed in the footing course of the <br />slabs. They tvill be 3/4 inch steel, nine (9) inches long. two (2) <br />atag�ered rows. twenty-four (24) inche� bete�een pins., tcrelve inches <br />between ro�as. <br />rQhey shall be placed before the concrete is set, �n that they <br />will extend three (3) inches into the top course of salba. <br />54.--iS��i?"v1IJE WA TER-PROOFING: <br />After the bottom cour3e of concrete slabs has been cured for ten <br />(10) days. it shall be tlioroughly clea.zed off by water slushing witki <br />steel brushes or in whatever manner satisfactory to the tVater Superin- <br />�endent. and shall then be allowed to air dry for at leas� five days. <br />After the expanaion joints have been fil2ed �vith asphalt as above <br />specified, a three ply ;�r_mbrane t7aterproofing shall be applied to the <br />whole surface of the conc:rete lining, It shall be "Genaeco Il�embrane <br />1Paterproofing" or equivalent, 3acisfactory to the Water Superintendent, <br />and shall be applied as per following specific•.�ions for "Genasco �lem- <br />brane �Yaterproofing." <br />55•--SPDCIFICATIONS FOR �:iTE�I_�LS A�ID APPLICAlIOid OF G7'NASCO hfHBfiAPiE: <br />WATERPROOI'ING : <br />i,4ATr:iI,aLS : <br />TH� PRIME?i shall be GE�T,4SC0 COidCRE^ir^, PRIi:1?�'R: <br />THE t7ATERPR00FING FACTOR shall be G�JASCO Z"JATERPROOFING dSPHALT <br />THE REINFORCING L'ACTOR shall be G:iASCO AI,L-RAG STAIDARD I'�,S,T: <br />�veighing approxiniately 15 pounds ner 100 sq, ft. — <br />APrLSCA'T_ ION: <br />G�IASCO Td�7��RANE �VA?`EF.PR�OFING shall be laid in the follo�ning man- <br />ner, uain� the above ;.iaterials: <br />PI?tSl OPER�1`iTON: Prime the surfacr to be �vaterproofed with G�1ASC0 <br />COi1C�TT� PF.r.."ER, ueing approxinv�tely 10 pounds per square. <br />ST�'�OPTD OPERATION: Over the surface thus prime�, mop do��n aporoxi- <br />mately 30 pounds of aSPHAI,T PET.? SQUare� into �vhich, while hot, appl�� <br />��vo layers of Genasco STA��DATtD F�LT• lapping each sheet 1�° and mop- <br />pia�g the full midth of ��hP lap, usin� ap�oroxirrately 30 pounds of <br />ASPHALT per square. <br />' '- <br />