1925 (#1403-1607) - Laserfiche WebLink

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length that they c~nnot reach ~ll of the material in the bot- tom of the mixer. SECTION 5. TRANSWORTATION OF ~IWTURE. The asphaltic concrete wearing surface shall be trans- ported from the paving plant to the work in tight vehicles, previously cleaned of aT1 foreign material and shall be covered with canws or other suitable material, of sufficient size to protect it from weather conditions. No loads shall be sent out so late in the day as to interfere with spreedIn~ and compact- ing the mixture during the daylight. Each load on reaching its destination, sh,ll have ~ temperature of not less than two hun~ ared fifty (250') degrees Fahrenheit. S~C~ION ~. ~A¥ING. (a) Prior to the arrival of the surface course mix- the work the prepared base shall be cleaned of all ture on loose and foreign materials. The mixture shall be pIaced only upon a base which is dry or at least free from standing water ~nd only when weather conditlone are suitable. Upon arrival on the work, it shall be dumped either inside or outside of the area on which it is to be spread. Every portion of the load shall be turned with hot shovels. It sb~ll be evenly ra~ed to correct de~th with.hot rakes, the teeth of the r~kes extending through the total depth of wearing surface misture. V~enever the workmen step on the mixture, after epresdlng the foot prints e~ll be loosened to their full depth with the rakes. (b) Contract surfaces of curbs, gutters, manholes, etc., shall be painted with a thin uniform coating of hot asphalt cement or asphalt cement dissolved in naphtha, Just before the surface misture is p~aced a~afnst them. SECTION ~. ROLLING. Immediately ,fret the wearing surface mlsture has been spread and raked, initial compression shall be m~talned by the use of a power driven tamdem roller weighing not less than eight (8) tons. ~ile the wearing surface is still hot and plastic, it shall be rolled with a twelve (12) ton three whell power roller, having a weight of not less than four hundred (400) pounds per linear inch of tire width, until the surface is un¥ieldtn~ ,nd true t~ ~rade and cmoss section. Rolling shall start longitudlna~ly at the sides and proceed toward the center of the pa.vment, overlapping on successive tripe by at least one-ball (~) the tire width of the roller. The pavement sh. ll the~ be subjected to diagonal ro]linm in two directions, tbs second diagonal rolling crossing the lines of the first. If the width of the pavement permits, it shall, in sdditlon be rolled ~t right angles to the can-