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在0℃条件下,对不同浓度氯盐浸蚀的沥青混凝土进行弯曲试验,试验结果表明氯盐的浸蚀对沥青混凝土的低温抗裂性能有一定的影响,而且整体趋势随着浸泡浓度的增大逐渐降低并趋于缓和。通过对试验数据分析可知,如果单独使用弯拉强度、弯拉应变作为评价沥青混凝土的低温抗裂性能指标,有时会出现评价结论不一致,所以采用弯曲破坏能临界值作为评价沥青混凝土的低温抗裂性能指标,更接近于试验结果。
The bending test of asphalt concrete with different concentration of chloride salt at 0 ℃ showed that the corrosion of chloride salt affected the low temperature cracking resistance of asphalt concrete to a certain extent, and the overall trend increased with the increase of immersion concentration Large gradually reduce and tend to ease. Through the analysis of the experimental data, we can see that if the bending strength and bending strain alone are used as indexes to evaluate the anti-cracking performance of asphalt concrete at low temperature, there are some inconsistencies in the evaluation results. Therefore, the critical value of bending damage can be used as a criterion to evaluate the cracking resistance of asphalt concrete at low temperature Performance indicators, closer to the test results.