Parks and park engineering . of thetandem roller with the high compression given by the three-wheeled roller. 7. Impregnating Earth Roads with Crude Oils. Thismethod originated in California, where a high-grade asphalticoil is plentiful. The process consists in loosening the soilfor a depth of 6 inches. Heated oil is then applied andthoroughly kneaded into the soil by means of a rollingtamper. The work can be done only in warm dry soils are better adapted to this treatment than heavyones. Three hundred barrels per mile to be applied onceeach year are sufficient for a 12-foot roa
Parks and park engineering . of thetandem roller with the high compression given by the three-wheeled roller. 7. Impregnating Earth Roads with Crude Oils. Thismethod originated in California, where a high-grade asphalticoil is plentiful. The process consists in loosening the soilfor a depth of 6 inches. Heated oil is then applied andthoroughly kneaded into the soil by means of a rollingtamper. The work can be done only in warm dry soils are better adapted to this treatment than heavyones. Three hundred barrels per mile to be applied onceeach year are sufficient for a 12-foot roadway. 8. Impregnating New Macadam Pavements with Bitumi-nous Materials by the Penetration Method. There are severalmethods employed, for which see Highway Engineering,by Blanchard and Drowne, to which work the author isindebted for much of the information here presented onpavements. One of the best is as follows: The upper course is built of crusher run from lj-inch to^-inch size. On this without further filling of the voids. Courtesy Austin-Western Road Machinery Co. FIG. 37.—Pressure Distributor.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishere, booksubjectparks
