Effect of Lime on Asphalt Concrete Pavement Performance

by M. Stroup-Gardiner, Univ of Nevada, United States,
Jon A. Epps, Univ of Nevada, United States,



Document Type: Proceeding Paper

Part of: Serviceability and Durability of Construction Materials

Abstract:

In the early to mid 1980's, the Federal Highway Administration constructed 15 experimental field test sections in four states designed to investigate mitigating moisture damage of asphalt concrete by adding lime to asphalt concrete mixtures. In 1987, these test sections were used in a second FHWA program to investigate both pavement performance as related to moisture sensitivity and the ability of various laboratory testing procedures to estimate the observed performance. This paper uses the data developed in the experiments to: investigate the impact of various methods of adding lime on mixture stiffness; compare mixture stiffness of cores to freshly prepared laboratory samples; and compare laboratory estimates of moisture sensitivity of cores to corresponding laboratory-prepared samples for two levels of vacuum saturation. Variables included in testing were: level of saturation, and number of freeze/thaw cycles.

Subject Headings: Asphalt concrete | Asphalt pavements | Moisture | Lime | Mixtures | Concrete pavements | Stiffening

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