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<p>The cracking resistance of road asphalt mixtures under the environmental influence of complex service factors is currently one of the research hot spots and difficulties. Based on the design method of Superpave asphalt mixture, the loading method of three-point bending for asphalt mixtures performance with the Sup-13 on the top layer of highway pavements and the Sup-20 asphalt mixtures on the middle layer were conducted by adding different volume content of basalt fibers (0%, 0.15%, 0.30%, and 0.45%) and temperatures (−&#xa0;10&#xa0;°C, −&#xa0;5&#xa0;°C, 5&#xa0;°C, and 15&#xa0;°C). Based on experimental and theoretical analysis, stress–strain curves and variation patterns of bending and tension are provided. The experimental results show that when the temperatures are constant, with the volume increase in the basalt fiber content, the bending and tensile strength and its maximum strain of Sup-13 and Sup-20 asphalt mixtures increase, but the bending stiffness modulus gradually decreases. When the volume content of basalt fibers is constant, the bending and tensile strength and its modulus of the two kinds of asphalt mixtures gradually decrease and the maximum strain gradually increase with the increase in temperatures. Based on the theoretical analysis of the test data, the damage model of the bending and tensile properties of asphalt mixtures was established, and the test curves conformed well to the theoretical model.</p>

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Research on the Cracking Resistance and its Damage Model of Asphalt Mixtures with Basalt Fibers Under Different Temperatures

  • 期刊论文

  • 发表日期：

    2025年4月22日

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  • Zhenjun He,
  • Jinpeng Yang,
  • Yuyan Wang,
  • Jianlong Zhang

摘要

The cracking resistance of road asphalt mixtures under the environmental influence of complex service factors is currently one of the research hot spots and difficulties. Based on the design method of Superpave asphalt mixture, the loading method of three-point bending for asphalt mixtures performance with the Sup-13 on the top layer of highway pavements and the Sup-20 asphalt mixtures on the middle layer were conducted by adding different volume content of basalt fibers (0%, 0.15%, 0.30%, and 0.45%) and temperatures (− 10 °C, − 5 °C, 5 °C, and 15 °C). Based on experimental and theoretical analysis, stress–strain curves and variation patterns of bending and tension are provided. The experimental results show that when the temperatures are constant, with the volume increase in the basalt fiber content, the bending and tensile strength and its maximum strain of Sup-13 and Sup-20 asphalt mixtures increase, but the bending stiffness modulus gradually decreases. When the volume content of basalt fibers is constant, the bending and tensile strength and its modulus of the two kinds of asphalt mixtures gradually decrease and the maximum strain gradually increase with the increase in temperatures. Based on the theoretical analysis of the test data, the damage model of the bending and tensile properties of asphalt mixtures was established, and the test curves conformed well to the theoretical model.