AN EXTENSION OF ASPHALT RESEARCH AS REPORTED IN 1937 PROCEEDINGS

WITH AN IMPROVEMENT IN TESTING EQUIPMENT, THIS REPORT COVERS THE RESULTS OF TESTS ON ASPHALT CEMENTS, AND ON BEAMS PREPARED FROM LABORATORY MIXTURES, AND ON BEAMS OF FINE AND COARSE GRAINED CONCRETES CUT FROM SECTIONS OF OLD PAVEMENTS AND FROM FRESHLY LAID MIXTURES. THE FOLLOWING CONCLUSIONS ARE DRAWN: (1) AS SOFT AN ASPHALT AS IS CONSISTENT WITH STABILITY SHOULD BE USED IN EVERY CASE, AS ASPHALTS EXTRACTED FROM CRACKED PAVEMENTS ALL SHOW LESS THAN 30 PENETRATION., (2) MIXING TEMPERATURES SHOULD BE KEPT BELOW 325 DEGREES F., (3) PAVEMENTS SHOULD BE DESIGNED TO PROVIDE THE MOST DENSE PAVEMENT POSSIBLE AS LONG AS SUFFICIENT ASPHALT IS USED TO PROVIDE THE NECESSARY FLEXIBILITY, (4) A SUGGESTED IDEAL BITUMINOUS PAVEMENT AS TESTED FOLLOWING THE METHOD OUTLINED IN THIS REPORT SHOULD SHOW A MODULUS OF RUPTURE OF 1,200 AND A MODULUS OF ELASTICITY OF 40,000.

• Supplemental Notes:
  • Vol 9, P 200
• Authors:
  • Raschig, F L
  • Doyle, P C
• Conference:
  • Assoc Asphalt Paving Technol Proc
• Publication Date: 1937-12

Subject/Index Terms

• TRT Terms: Asphalt cement; Asphalt tests; Beams; Bituminous pavements; Concrete; Concrete tests; Density; Mixing; Modulus of elasticity; Modulus of rupture; Pavement cracking; Pendulum tests; Research; Softening point; Temperature; Testing equipment
• Uncontrolled Terms: Concrete beams
• Old TRIS Terms: Mixing temperature
• Subject Areas: Highways; Materials; Research;

Filing Info

• Accession Number: 00210938
• Record Type: Publication
• Source Agency: Highway Research Board Bibliography
• Files: TRIS
• Created Date: Jun 10 1994 12:00AM