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Improvement of the Low-Temperature Cracking and Shear Resistance of Semi-Flexible Mixture Modified by Polymers

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DOI: 10.23977/jmpd.2023.070210 | Downloads: 13 | Views: 523

Author(s)

Guobao Luo 1, Shengliang Li 2, Mingzhi Sun 1, Zhihong Huang 2

Affiliation(s)

1 Research Institute of Highway Ministry of Transport, Beijing, China
2 School of Civil Engineering, Chongqing Jiaotong University, Chongqing, China

Corresponding Author

Mingzhi Sun

ABSTRACT

Semi-flexible mixture, as a rigid and flexible pavement material, has good rutting resistance and water stability, but its low-temperature cracking and shear resistance are poor. This paper studies and characterizes the low-temperature cracking resistance and shear resistance of semi-flexible mixtures modified by redispersible emulsion powder and epoxy resin. The performance of matrix asphalt mixture and cement grouting material with different polymer contents were investigated. The flexural and shear performance of polymer-modified semi-flexible mixtures were measured based on low-temperature bending test and direct shear test. The results indicate that the addition of polymers, especially epoxy resin, can significantly improve the failure strain, flexural strength, stiffness modulus and shear strength of semi-flexible mixture, thus enhancing its low-temperature cracking and shear resistance.

KEYWORDS

Semi-flexible mixture, polymer, cracking resistance, shear resistance, cement grouting material

CITE THIS PAPER

Guobao Luo, Shengliang Li, Mingzhi Sun, Zhihong Huang, Improvement of the Low-Temperature Cracking and Shear Resistance of Semi-Flexible Mixture Modified by Polymers. Journal of Materials, Processing and Design (2023) Vol. 7: 70-78. DOI: http://dx.doi.org/10.23977/jmpd.2023.070210.

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