Southern good roads . es of bituminous macad-am, we have the bituminous concretes in which a denseaggregate is prepared by mixing sand with crushedstone or gravel of various gradings, and then mixedwhile hot with a proper proportion of hot bituminousmaterial. The hot mixture is spread to a uniform depthover the foundation, thoroughly compressed by rolling,and finished with a vei-y thin seal coat and clean chipsor pea gravel. The seal coat is sometimes omittedwhen the density of the mixture warrants it. While not a method of bituminous construc-tion, it is not uncommon practice to con
Southern good roads . es of bituminous macad-am, we have the bituminous concretes in which a denseaggregate is prepared by mixing sand with crushedstone or gravel of various gradings, and then mixedwhile hot with a proper proportion of hot bituminousmaterial. The hot mixture is spread to a uniform depthover the foundation, thoroughly compressed by rolling,and finished with a vei-y thin seal coat and clean chipsor pea gravel. The seal coat is sometimes omittedwhen the density of the mixture warrants it. While not a method of bituminous construc-tion, it is not uncommon practice to consider surfacetreatment as such for purposes of discussion and com-parison when by suifaee treatment we mean the forma-tion of a relatively thin wearing carpet of bituminousmaterial and coarse mineral matter as distinguishedfrom the palliative effect accomplished by the applica-tion of thin Huid bitumens for the purpose of tempor-arilv laving the dust. Surface Ireatment as above de- ;\[arch, 1915 SOUTHERN noon ROADS II. A Convict Koad Gang at Work in Buncombe County, North Carolina fined is nsnally looked ttpoii as a form of )iit wliii-r it is planned and figured as a part of new(?oustrtieti.)U, it must in the long rtni, justify its itse liyfavorable comparison with the cost of maintaining oth-er types iif cimstruetioit under similar conditions. The above brief deseriiitions cover the most gener-ally accepted methods for the applicati- lie stated in passing, however,that interesting and helpful experiments iuive beenconducted along these sjieeial lines with resultant im-provement in the methods of utilizing the nuiterials in-volved. Now with these well defined methods iif
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Keywords: ., bookauthorvarnerhe, bookcentury1900, bookdecade1910, bookyear1910
