Public works . sisting of one part ofPortland cement to three parts of sandwas mixed without the addition ofwater and was then slightly moistenedand spread to a depth not to exceedone inch over the concrete, after whichthe pavers laid the blocks, standing inthe grade the same as when a sandcushion is used. The paving gang usu-ally consisted of fourteen or fifteenpavers and seven rammer men besidesthe men on the dry mortar cushion andthe stone chuckers putting the blocks inthe grade. After the blocks had been paved, rammed and back-rammed, hot asphalt was drawn from large heatingkettles or tank
Public works . sisting of one part ofPortland cement to three parts of sandwas mixed without the addition ofwater and was then slightly moistenedand spread to a depth not to exceedone inch over the concrete, after whichthe pavers laid the blocks, standing inthe grade the same as when a sandcushion is used. The paving gang usu-ally consisted of fourteen or fifteenpavers and seven rammer men besidesthe men on the dry mortar cushion andthe stone chuckers putting the blocks inthe grade. After the blocks had been paved, rammed and back-rammed, hot asphalt was drawn from large heatingkettles or tanks on the street, by means of a hand pump,into a mechanical mastic mixer, consisting of a smallmachine having an inverted conical shaped tank withpaddles set at an angle on a shaft revolving inside thetank. This shaft is operated by gears at the bottomwhich in turn are connected with a ten-horse-power gas-oline engine. This machine and engine were placed nearthe large tank in which the asphalt was heated and the. The photographs onthis page were alltaken from the pointA in the plan onpage 128. In eachcase the photograph-er waited for a brealiin the traffic, whichis normally heavierthan shown. The first photographshoAvs condiions at 1P. il., August before the oldblocks were second was tak-en at 11 P. M., Aug- step was the loosening of the old paving blocks and theloading and carting of them away. In loosening, onerow of blocks out of every 8 or 9 was removed by barsand the others pried loose; traffic continuing to use thepavement more or less until all the blocks were actuallyremoved. Motor trucks were used for hauling away theold blocks and the dirt removed in grading. The men who loaded the blocks onto the trucks werethen placed on the grade and removed the earth to sub-grade and shaped the subgrade to a surface parallel tothe finished pavement. Usually there were from thirtyto thirty-five men on this portion of thework. The next step was the mixing andpla
Size: 2239px × 1116px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectmunicip, bookyear1896
