Evaluation on High Temperature Performance of Asphalt Mixture by Triaxial Dynamic Compression Test

Abstract

This paper aims to explore the reasonability of an evaluation method on high temperature performance of asphalt mixture through a series of experiements. The first step of these experiements is to formulate specimens of different high-temperature performances by Gyratory Testing Machine which simulates the on-road pavement to the most extent , and then adopt triaxial dynamic compression test to compare and analyze high-temperature performances of these specimens. By introducing concepts and indicators such as validity, reliability, discrimination, this paper evaluates comprehensively the discrimination results of various compression test parameters on high-temperature performance of asphalt mixture. It concludes that the evaluation effect of compression stiffness modulus is best, followed by the slope of logarithmic creep curve and accumulated strain area, and the evaluation effect of final compression strain is comparatively poor. That provides an objective evaluation method on high temperature performances of asphalt mixtures.

A study on the influences of a hygrothermal environment on the compressive strength and failure criteria of asphalt mixtures based on true triaxial tests

“…Yang et al [37] proposed that the intermediate principal stress can be used as an important assessment factor of the strength of asphalt concrete under low temperature. Wu [38] evaluated the influence of various parameters on the performance of asphalt mixtures under high temperature through triaxial tests and found that intermediate principal stress should be considered when the mechanical properties of asphalt mixtures were studied.…”