摘要: |
A number of factors and variables influence the chemical composition and, ultimately, the engineering properties of a binder used in pavement applications. It is important that the users most closely working with binders have a strong working knowledge of the relationship between binder chemistry and engineering properties. In addition, the relationship among standard process control actions and final chemical composition needs to be understood so that correlation to physical performance can be made. This synthesis can provide the chemical composition knowledge to help departments of transportation (DOTs) and practicing engineers make more informed choices with regard to selection of binders and post-production additives and modifiers and avoid potentially expensive mistakes. Also, researchers might develop more informed methods to design binder modifiers and additives that will result in low-cost and high-performance binders for specific applications. The information in this synthesis was gathered by a thorough review of the available U.S. and international literature. A comprehensive literature search was performed using the TRID database, Sci-Finder, Bing, and Google. In addition, a survey of U.S. state DOTs and Canadian ministries of transportation was conducted to determine the current status of asphalt chemical analysis. The U.S. state and District of Columbia response rate to the survey was 88.2% (45 of 51). Only eight of the 14 Canadian. |