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冰川冻土  2013 

氯盐对沥青混凝土冻融劈裂抗拉强度影响的试验与分析

DOI: 10.7522/j.issn.1000-0240.2013.0135, PP. 1202-1208

Keywords: 沥青混凝土,冻融劈裂,氯盐,腐蚀因子

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Abstract:

由于昼夜温度交替变化,盐渍土地区的沥青混凝土路面易发生冻融破坏,影响沥青路面的使用性能.采用冻融劈裂试验,以冻融劈裂抗拉强度和冻融腐蚀因子评价沥青混凝土在氯盐侵蚀下强度的变化规律.结果表明经过氯盐侵蚀冻融循环后,沥青混凝土的冻融劈裂抗拉强度明显下降;而且随着冻融次数的增加,其冻融劈裂抗拉强度下降的幅度增大.冻融腐蚀因子也呈现同样的变化规律,氯盐浓度越高,对沥青混凝土冻融劈裂抗拉强度和冻融腐蚀因子影响也越大.试验研究结果为盐分地区沥青路面结构设计提供科学依据.

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