ORIGINAL RESEARCH article
Front. Mater.
Sec. Polymeric and Composite Materials
Volume 12 - 2025 | doi: 10.3389/fmats.2025.1634717
Study on fatigue characteristics of anti-stripping sandstone asphalt mixture after water immersion
Provisionally accepted
- 1GuiTong Engineering Management Group Co., Ltd., Nanning Guangxi, China
- 2Changsha University of Science and Technology, Changsha, China
- 3Beitou Low-altitude Economy Investment Co., Ltd., Nanning Guangxi, China
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The insufficient adhesion between sandstone aggregates and asphalt binders makes the mixture susceptible to fatigue cracking under moisture conditions, limiting the widespread application of sandstone aggregates. Thus, two non-amine anti-stripping agents, XT-1 (XT) and PM-JL-06A (PM), were selected to enhance the adhesion properties of sandstone asphalt mixtures. First, the type and optimal dosage of anti-stripping agents were determined through three indicators and the boiled method test. Then, four point bending strength tests with different loading rates were carried out on the immersion and non-immersion sandstone asphalt mixture, and on this basis, four point bending fatigue test and fatigue residual strength test were carried out. The results show that compared to the XT antistripping agent, the PM agent more effectively enhances the adhesion of sandstone-asphalt mixtures, raising the adhesion grade from level 3 to above level 4 at an optimal dosage of 0.4%. Compared with conventional SBS-modified sandstone asphalt mixtures, PM-modified mixtures showed a 5.3% average increase in dynamic load strength under dry conditions and an 8.4% improvement under water immersion conditions. Furthermore, the addition of PM anti-stripping agent increased the fatigue life by 33.8% under dry conditions and 38.9% under water immersion conditions. Notably, PM modification significantly reduced the damage factor and damage sensitivity of the mixture under cyclic loading while substantially decreasing the fatigue strength decay rate.
Keywords: sandstone asphalt mixture, Anti-stripping agent, Adhesion, Fatigue residual strength, Fatigue damage evolution model
Received: 25 May 2025; Accepted: 10 Jul 2025.
Copyright: © 2025 Zhang, Zhang, Huang, Huang, Zhou and Huang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Tuo Huang, Changsha University of Science and Technology, Changsha, China
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