Temperature Related Visco-Elastoplastic Properties of Asphalt Mixtures
Publication: Journal of Transportation Engineering
Volume 126, Issue 1
Abstract
Parameter characterization of asphalt mixtures at various test temperatures is a crux to the performance evaluation of flexible pavements using the visco-elastoplastic method. But the difficulty of determining the relevant parameters experimentally is that deformations of time independent components and viscous components occur simultaneously in the tested sample. To solve this problem, a measuring system of two loggers was introduced to record the transient and time dependent deformations in creep and recovery tests. Based on the deformation separation, parameters of visco-elastoplastic models of asphalt mixtures proposed by Sides et al. are evaluated. Experiments conducted under four temperatures show that all parameters obtained in this way can be related to the temperature approximately either by a linear function or by a power function. Test results and parametric studies show that viscous response of asphalt mixtures to the stress is particularly strong at high temperatures. It is postulated that the process of transition from initial creep to the secondary or final stage of creep will be accelerated for the asphalt mixtures at high temperatures.
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 126 • Issue 1 • January 2000
Pages: 58 - 65
History
Received: Dec 8, 1997
Published online: Jan 1, 2000
Published in print: Jan 2000
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