UNITED STATES DEPARTMENT OF AGRICULTURE 



BULLETIN No. 407 



Contribution from the Office of Public Roads and 

 Rural &igineering 



LOGAN WALLER PAGE, Director 



Washington, D. C 



PROFESSIONAL PAPER 



November 10, 1916 



PROGRESS REPORTS OF EXPERIMENTS IN DUST 

 PREVENTION AND ROAD PRESERVATION, 1915. 



CONTENTS. 



Page. 



New experiments 1 



Mount Vemon Avenue Road, Alexandria County, Va. (bituminous macadam; penetration and 



mixing methods; bituminous gravel concrete) 2 



Falls Road, Montgomery County, Md. (bituminous surface treatment) 24 



Bradley Lane, Montgomery County, Md. (penetration macadam) 30 



Washington, D. C. (bituminous concrete) 32 



Buena Vista, Fla. (oU-asphalt-coralline rock) 35 



Jupiter, Palm Beach County, Fla. (oil-asphalt-sand) 38 



West Palm Beach, Fla. (bituminous-sand, mixing methods) 40 



Ocala, Fla. (sand-asphalt) 41 



Supplementary reports on experiments previously reported : . . . 45 



Lemon City, Fla., 1914 (oUs, tar preparation, calcium chloride-coralline rock) 45 



West Pahn Beach, Fla., 1914 (oU, tar, oil-asphalt-coralline rock) 46 



Miami, Fla., 1913 (oil-coralline rock) 47 



RockviUe Pike, Montgomery County, Md., 1913 (bituminous surface treatment) 48 



Washington, D. C, 1912 (tar preparation and oil-surface treatment) 55 



Chevy Chase, Montgomery County, Md., 1912 (bituminous concrete, cement concrete, oil-cement 



concrete, vitrified brick, bituminous surface treatment on concrete) 57 



Chevy Chase, Montgomery County, Md., 1911 (bitmninous construction and surface treatment). . 60 



Jamaica, N. Y., 1911 (oil-cement concrete, oil asphalt, tar and fluxed native asphalt) 65 



Ames, Iowa, 1910 (oil-asphalt-gravel) 67 



KnoxviUe, Tenn., 1910 (tar and oil preparations) 67 



Youngstown, Ohio, 1910 (slag, lime, waste sulphite liquor and tar) 68 



Dodge City, Garden City, Bucklin, and Ford, Kans., 1908 (sand-clay). . . , 69 



Bowling Green, Ky., 1907 (Kentucky rock asphalt) 71 



NEW EXPERIMENTS. 



The experiments begun by the Office of Public Roads and Rural 

 Engineering during the year 1915 are all concerned with the use of 

 bituminous materials in road construction, and include the construc- 

 tion of roads surfaced with bitumen and coralline rock, bitumen and 

 sand, bituminous macadam by the penetration and mixing methods,* 



' In the future publications of this ofUce " bituminous macadam by the penetration method " will be 

 called simply Mtuminous macadam, and "bituminous macadam by the mixing method " wiU be 

 called bituminous oncrete. 



52086°— Bull. 407—16 1 



