Analyses for finding better test property for estimating serviceability characteristics of asphalt mixtures

Wonbae Kim; Yeongsam Kim; Sungjin Lee; Kwang W. Kim

doi:10.22702/jkai.2024.14.2.20

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2024 Vol.14, Issue 2 Preview Page Next Page

Scientific Paper

Analyses for finding better test property for estimating serviceability characteristics of asphalt mixtures 아스팔트 혼합물의 공용특성과 상관성이 높은 시험특성 분석

31 December 2024. pp. 213-225

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Abstract

The rut and crack are two most-typical damage patterns in asphalt pavement, and they are induced due to the change of binder stiffness under loading at different temperature. Two test properties used for evaluating rutting resistance at 60°C in this study are wheel tracking (WT) rut depth and strength against deformation (S_D). The test property used for evaluating crack resistance is indirect tensile strength (ITS) at 25°C. In addition, Marshall stability (MS) was used as another high-temperature property. Regression analyses were performed to evaluate correlation between two properties each other among the four using various asphalt mixtures. The rut resistance represented by rut depth of WT showed a good correlation with S_D with R² ≒ 0.90 on average. The regressions between ITS and S_D, and ITS and WT showed R² ≒ 0.61 and 0.69 on average, respectively. The reason why one property showed good correlation with another among the three is that those properties are related with binder stiffness. It is well known fact that the mixture with higher stiffness binder showed higher rut resistance and good tensile property. On the other hands, all three regressions between MS and WT, MS and S_D, and MS and ITS showed poor correlations with R² ≒ 0.2 on average. Therefore, it was found that the MS is not the property showing good relation with any performance of asphalt mixture. It was concluded that the WT results could be reliably estimated by S_D. Although S_D showed somewhat noticeable correlation with ITS, it should be studied further for practical application for estimation of tensile property by SD. However, it is better not to use Marshall stability as a serviceability index of asphalt mixture.

Keywords

Correlation

Deformation strength

Wheel tracking

Indirect tensile strength

Marshall stability

References

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Information

Publisher :KOREAN ASPHALT INSTITUTE
Publisher(Ko) :한국아스팔트학회
Journal Title :Journal of the Korean Asphalt Institute
Journal Title(Ko) :한국아스팔트학회지
Volume : 14
No :2
Pages :213-225
Received Date : 2024-12-15
Revised Date : 2024-12-24
Accepted Date : 2024-12-31
DOI :https://doi.org/10.22702/jkai.2024.14.2.20

Journal of the Korean Asphalt Institute ISSN:2234-0785(Print) 2635-9553(Online) 한국아스팔트학회지

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