1980-06-30 Special Called Meeting

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• • Material Produced for rlaintenance Requisition. T!ie limestone rock asphalt aggregate grading and flux content o£ the mi:{ture • shall be within the limits specified. The designar_ed ~;radin~ and flux content shall be selected from the first shipment for material on each shiprent or partial shipment wlierc requested by the City, and the mixture produced shall conforrz to this cJesi;;nated f;radin~; and flux content throughout each shipr;et:t or parti~il shipment, respectively, A~1t111I1 the tolerances specified above. Water Content. If the rock asphalt mi::tt:re is prep<<red at sot::e central point a;id shipped to the ~.rork, welter may l:e added to prevent sitting-up in transit. If water is added, the total water so added shall not exceed 4 percent by Freight and shall be administered to the mixture through an approved-spray bar. If the rock asphalt ;,lixture is prepared on or adjacent to the project, the addition of water will not be permitted unless authorized by the City. The amou.~it of water that may be added shall be as designated by t'.ie City but shall not exceed 4 percent by weight. In order to insure uniformity of the rock asphalt mixture as suitable measuring device, subject to approval of the City, shall be used to accurately measure the amount of water to be imcorporated into each batch. All ~•~ater in the mixture in excess of 4 percent by weight at the ti~~e of weighing the mixture on the payment. The method of determining, flee tonnage of mixture for payment. Tlie method of determining the water content of the mixture shall be in accordance with Test Method Tex-21?-F. The water content shall be measured on representative samples, each representing; approximately 200 tons. Not less than one sample shall he taken on eacl-i day's run. • Physical Properties of the ilixture. The materials may be mixgd on the job or at some central mixing plant and shipped ready to use. "i::tures treat do not remain caor}cable ~~ sufficient period of tine of permit unloading by normal means , proper spr. eacling; , bladinf~ anu rolling will not be acceptable. • (?.6)