Deterioration of Bonding Performance of OPC-SAC Binary System Pavement Repair Materials under Extreme High Temperatures

DOI: https://doi.org/10.62517/jcte.202506413

Author(s)

Mingjia Xu, Shuang Yao*, Yuxin Yang, Jianan Liang, Guifeng Li, Hongwu Shan

Affiliation(s)

School of Civil Engineering and Architecture, Yangtze Normal University, Chongqing, China *Corresponding Author

Abstract

In recent years, amid intensified global climate change, extreme high temperatures severely damage cement pavements in China. Studying how OPC-SAC affects the bonding performance of pavement repair materials under such conditions is crucial for improving road quality, durability, and adaptability to extreme climates. To promote polymer cement-based materials in building repair and renovation, this study focuses on extreme high temperatures’ impact on the OPC-SAC binary system—SAC has fast early strength development and excellent mechanical properties, while OPC develops strength steadily, with good late-stage strength and wear resistance; their blended system, distinct from traditional ones, is a cement-based repair material with excellent and stable early performance. The study tested different proportions of this system, compared different temperatures and heat treatment durations, and explored their influence on the material’s physical and bonding properties; results show that after 3 days of heat treatment, the sample’s flexural strength is around 2.0 MPa at room temperature, peaks at approximately 3.8 MPa at 60 °C (with the strongest cement mortar bonding), and all samples’ bonding strength weakens at 80 °C.

Keywords

Ordinary Portland Cement-Sulphoaluminate Cement (OPC-SAC); Extreme High Temperature; Material Performance Deterioration

References

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