A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design and Use of Superior Asphalt Binders (Revised)
The study is a continuation of Study 1155 whose major objective was to use supercritical fractionation of asphalt to study the effect of asphalt composition changes on properties and to use this knowledge to reblend fractions to make superior asphalts. In the study both supercritical cyclohexane and supercritical pentane have been used to fractionate three reduced crudes and the corresponding AC-20 asphalts into a range of fractions. Because it is not possible to evaluate an asphalt without its long-term road aging characteristics, and because no satisfactory roadaging simulation existed, a major effort in the study became the development of a satisfactory aging procedure. It is shown that no aging test run at a single elevated temperature can predict performance at road temperature. Methods are given for predicting low temperature aging from values measured at several higher temperatures. It is shown that the aging characteristics of asphalt can be broken into two parts: the rate of oxidation as measured by carbonyl formation and the susceptibility of the viscosity to increase due to this carbonyl formation. Data indicate that the latter may be primarily a function of compatibility. The relation between viscosity change and carbonyl growth is highly correlated for each asphalt.
Design and Use of Superior Asphalt Binders (Revised)
The study is a continuation of Study 1155 whose major objective was to use supercritical fractionation of asphalt to study the effect of asphalt composition changes on properties and to use this knowledge to reblend fractions to make superior asphalts. In the study both supercritical cyclohexane and supercritical pentane have been used to fractionate three reduced crudes and the corresponding AC-20 asphalts into a range of fractions. Because it is not possible to evaluate an asphalt without its long-term road aging characteristics, and because no satisfactory roadaging simulation existed, a major effort in the study became the development of a satisfactory aging procedure. It is shown that no aging test run at a single elevated temperature can predict performance at road temperature. Methods are given for predicting low temperature aging from values measured at several higher temperatures. It is shown that the aging characteristics of asphalt can be broken into two parts: the rate of oxidation as measured by carbonyl formation and the susceptibility of the viscosity to increase due to this carbonyl formation. Data indicate that the latter may be primarily a function of compatibility. The relation between viscosity change and carbonyl growth is highly correlated for each asphalt.
Design and Use of Superior Asphalt Binders (Revised)
R. R. Davison (author) / J. A. Bullin (author) / C. J. Glover (author) / H. B. Jemison (author) / C. K. Lau (author)
1992
212 pages
Report
No indication
English
| Springer Verlag | 2017
NTIS | 2000
| European Patent Office | 2018
| European Patent Office | 2017