UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 704 



Contribntion from the Bureau of Public Roads 

 LOGAN WALLER PAGE, Director 



Washington, D. C. 



PROFESSIONAL PAPER 



August 30, 1918 



TYPICAL SPECIFICATIONS FOR NON- 

 BITUMINOUS ROAD MATERIALS 



By 



PREVOST HUBBARD, Chemical Engineer, and 

 FRANK H. JACKSON, Jr., Assistant Testing Engineer 



CONTENTS 



Introduction 1 



Specifications . . 4 



Methods of Testing 2i 



Methods of Selecting and Shipping 



Samples 35 



Detailed Table of Contents 39 



Index of Materials and Use 40 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1918 



