Evaluation of High-Temperature Performance of Asphalt Mixtures Based on Climatic Conditions

Yan Mu,Jian Liu,Wenhao Dong,Chen Li,Jiasheng Dai,Zhen Fu

doi:10.3390/coatings10060535

Abstract

The dynamic stability of a rutting test does not optimally reflect the high-temperature stability of asphalt mixtures. In this study, a rutting test was performed over a long duration (4 h) at different temperatures (40, 50, 60, 70 °C) for three asphalt mixtures, namely, matrix AC-16, SMA-16, and modified AC-16 asphalt mixtures. Subsequently, the temperature rutting rate was obtained after considering the annual temperature conditions of Guangdong and Beijing in China. Because the conditions of the rutting test were different from that of the actual pavement, the rut depth was calculated using a modified temperature rutting rate. This modification considered four factors: wheel trace distribution, temperature, pavement thickness, and loading rate. The calculation of the temperature rutting rate considered the climatic conditions and utilized the rutting deformation data from hour 1–4 of the rutting tests, during which the asphalt mixture was in a stable creep period. Thus, the high-temperature stability of the asphalt mixture was reflected more scientifically by the temperature rutting rate than the dynamic stability. The high-temperature rut-resistance of the asphalt mixture was found to improve significantly after the introduction of two additives (anti-rutting agent and lignin fiber). The modified formula for rut depth can realistically predict the annual rutting depth for three asphalt mixtures in a one-way driving pavement.

Highlights

Rutting damage, occurring at high temperatures, has become the main form of pavement damage [1]
The temperature rutting rate represents a correction of the rutting rate, after rutting ratefor
A rutting test was performed for a long duration (4 h) on three typical asphalt mixtures, namely, matrix AC-16, SMA-16, and modified AC-16 asphalt mixtures, at four temperatures

Summary

Introduction

Rutting damage, occurring at high temperatures, has become the main form of pavement damage [1]. Several tests are used globally in order to evaluate the high-temperature performance of asphalt mixtures, including the Marshall test, creep test, and rutting test. The rutting test is most widely used because it can reasonably simulate the actual state of the pavement caused by driving. Several indexes characterizing the high-temperature performance of asphalt mixtures are obtained based on the rutting test. Several researchers have investigated the selection of a high-temperature performance index for asphalt mixtures. Anderson [2] found that the high-temperature performance of asphalt mixtures can be studied by investigating their rotary compaction performance; Zheng et al, [3] adopted the dynamic stability of whole process (DSWP) to evaluate the anti-rut performance of the asphalt mixture

Methods

Results

Conclusion