Developing an aging model to evaluate engineering properties of asphalt paving binders

J. S. Chen, L. S. Huang

研究成果: Article同行評審

37 引文 斯高帕斯(Scopus)

摘要

Oxidative aging of asphalt is a primary cause of binder hardening in pavements, thus contributing to various forms of pavement failures. An essential element of predicting long-term pavement performance is to understand binder oxidative aging and its effect on engineering properties. Five asphalt binders were evaluated relative to their changes in engineering and chemical properties in pavement service. Laboratory rolling thin-film oven test (RTFOT) and pressure aging vessel (PAV) test were conducted to simulate the in-situ pavement aging. In addition, a test road was constructed for this study to investigate the real aging process in the field. Comparable data were shown between field binders and laboratory binders aged at temperature 60°C under pressure 20 kg/cm2. The aging time of asphalts in PAV depended on how long pavements were used in the field. This paper was to determine the temperature and pressure used for PAV to simulate aging condition in the field. A good correlation between field-service and laboratory aging during test road project was found. An aging model was proposed to predict the changes in paving binder's properties during field age hardening. Results were shown to give a close fit with experimental data from both laboratory and field aging tests. This model allowed highway engineers to quantify two essential characteristics of binder aging: the aging rate and the ultimate degree of changes in binder properties due to aging.

原文English
頁(從 - 到)559-565
頁數7
期刊Materials and Structures/Materiaux et Constructions
33
發行號9
出版狀態Published - 2000 十一月

All Science Journal Classification (ASJC) codes

  • 土木與結構工程
  • 建築與營造
  • 材料科學(全部)
  • 材料力學

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