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我国公路基层采用半刚性的水泥稳定碎石,此类材料的温缩开裂会通过荷载反射到面层形成反射裂缝,为了延缓和抵抗反射裂缝的产生和发展,本文综合了国内2大类8个小类的材料选取或夹层处理方法,通过对比国外先进的抗裂试验研究,选取了往返轮载试验作为评价试验,并为了结合工程实际和统一初始状态,采用了MMLS3小型加速加载设备对试样进行20000次的加载预处理。结果显示,混合料抗裂性能排序为:加入聚酯纤维的改性沥青混合料>ARAC13级配的橡胶沥青>SBS改性沥青混合料>AC13中级配的橡胶沥青混合料;应力吸收夹层的抗裂性能排序为:抗裂贴>橡胶沥青AC10>STRATA>聚酯玻纤布。
China’s road base with semi-rigid cement stabilized macadam, such materials, thermal cracking will be reflected by the load reflected to the surface to form reflective cracks, in order to delay and resist the generation and development of reflective cracks, this paper combines two major categories of 8 Small class of material selection or sandwich processing method by comparing the advanced anti-cracking test research, select the round-trip test as the evaluation test, and in order to integrate the actual state and the initial state, the use of MMLS3 small accelerated loading equipment sample 20000 load preprocessing. The results show that the anti-cracking performance of the composites is ranked as follows: Modified asphalt mixture with polyester fiber> Rubber asphalt with ARAC13 grade> SBS modified asphalt mixture> Rubber asphalt mixture with intermediate grade AC13; Cracking performance order: anti-cracking paste> rubber asphalt AC10> STRATA> polyester fiberglass cloth.