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沥青混凝土路面的冻融破坏是寒区路面早期破坏的主要形式之一。本文以冻融劈裂试验为基础,研究了沥青混合料劈裂抗拉强度随冻融循环次数的变化情况。结果表明,在最初的冻融循环中,沥青混合料的劈裂抗拉强度随着冻融次数增加而明显减小,当达到7次冻融循环之后,混合料的强度趋于稳定。
Freeze-thaw damage of asphalt pavement is one of the main forms of early destruction of pavement in cold regions. Based on the freeze-thaw splitting test, the change of splitting tensile strength of asphalt mixture with the number of freeze-thaw cycles was studied. The results show that in the initial freeze-thaw cycles, the splitting tensile strength of asphalt mixture decreases obviously with the increase of the number of freeze-thaw cycles. After 7 freeze-thaw cycles, the strength of the mixture tends to be stable.