The improvement is considered of the adhesive properties of bitumen by using cationic adhesion agents; comparative studies have been performed on their activating effect. Five methods of determining adhesion were employed and the studies revealed that improved adhesion has a favorable effect on the resistance of both the bituminous body and the tarred road surfaces to absorption and expulsion of water. Research, aimed at explaining the effect of the physico-mechanical characteristics of the gravel on the load-bearing capacity of the roadway, was performed in connection with the drawing up of specifications for the use of gravel as subgrade material. Factors such as elasticity and resistance to cracking and abrasion, grading particle size, and the coefficient of elasticity were also examined.

  • Supplemental Notes:
    • Presented at the XIVth World Road Congress, Prague, Czechoslovakia, 1971.
  • Corporate Authors:

    Permanent International Assoc of Road Congresses

    43 Avenue du President Wilson
    Paris 16eme,   France 
  • Authors:
    • Momtcheva, L
    • Boidev, V
    • Daskalova, L
  • Publication Date: 1971

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 35 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00265685
  • Record Type: Publication
  • Report/Paper Numbers: Book II-4
  • Files: TRIS
  • Created Date: Feb 27 1975 12:00AM