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为深入探讨玄武岩短切纤维在增强沥青混合料路用性能方面的适用性,通过马歇尔试验、浸水马歇尔试验、高温车辙试验、低温弯曲试验等室内试验,评价了AC-13C型玄武岩短切纤维沥青混凝土的路用性能。通过比较玄武岩短切纤维不同掺量和不同纤维长度的沥青混凝土性能指标,提出了短切纤维的最佳掺量和最佳适用长度,并探讨了玄武岩短切纤维改善沥青混凝土路用性能的基本原理。研究发现:AC-13C型玄武岩短切纤维沥青混凝土的高温、低温及水稳定性均优于不加纤维的沥青混凝土;玄武岩短切纤维的最佳掺量为3‰,最佳适用长度为6 mm,可作为提高沥青混凝土综合性能的添加材料用于道路工程中。
In order to further investigate the applicability of basalt chopped fiber in improving the road performance of asphalt mixture, the AC-13C basalt chopped fiber asphalt was evaluated through laboratory tests such as Marshall test, water immersion Marshall test, high temperature rutting test and low temperature bending test. Road performance of concrete. By comparing the performance index of asphalt concrete with different content of basalt chopped fiber and different fiber length, the optimal dosage of chopped fiber and the optimal applicable length are put forward, and the basalt basic properties of asphalt pavement are discussed principle. The results show that AC-13C basalt chopped fiber asphalt concrete is better than fiber-free asphalt concrete in high temperature, low temperature and water stability. The best dosage of basalt chopped fiber is 3 ‰ and the best applicable length is 6 mm, can be used as an additive material to improve the overall performance of asphalt concrete for road engineering.