Role of Sulphur in Sea Pavements.
McBee WC; Romans PA; Sullivan TA; Uhde RR
Pres At Sulphur-81 Internat Conf Calgary Alberta Canada 1981 May; :8 pages
As part of the Bureau of Mines sulfur utilization program, paving materials were developed in which sulfur replaced up to 35 pct of the asphalt binder volume. These sulfur-extended asphalt (sea) materials, along with those developed by private concerns, have been used to construct experimental highways in 20 states. Very little information has been obtained on the behavior of the materials during in-service aging. The sulfur microstructural features of core samples obtained from highways constructed using all existing sea technologies are described. In addition, the activation energy for diffusion and solubility limits of sulfur in asphalt were determined for a typical paving asphalt. A mechanism for nucleation and growth of crystalline sulfur in the pavement is presented and related to the structure developed in the material.
Pres. At Sulphur-81 Internat. Conf., Calgary, Alberta, Canada, May 25, 1981