玄武岩纤维对老化沥青混合料路用性能的影响

发布时间：2018-06-01 17:03

本文选题：道路工程 + 玄武岩纤维　；参考：《材料导报》2016年02期

【摘要】：为研究玄武岩纤维对老化沥青混合料路用性能的影响,通过车辙试验、低温弯曲小梁试验、浸水马歇尔试验和冻融劈裂试验研究了玄武岩纤维对沥青混合料抗老化性能的作用。试验结果表明:虽然玄武岩纤维沥青混合料的动稳定度随老化时间增加,但相对于普通沥青混合料而言,其增加的幅度减缓,提出采用相对变形率作为老化性能评价指标;玄武岩纤维延缓了沥青混合料老化性能的衰变,使得老化后的混合料低温抗裂性改善;经短期老化和长期老化后玄武岩纤维沥青混合料水稳定性能均优于普通沥青混合料,且玄武岩纤维显著降低了长期老化试件的未冻融劈裂强度,因此在应用中应适当增加碾压次数。
[Abstract]:In order to study the effect of basalt fiber on the pavement performance of asphalt mixture, the effects of basalt fiber on the aging resistance of asphalt mixture were studied by rutting test, low temperature bending trabecular test, immersion Marshall test and freeze-thaw splitting test. The test results show that although the dynamic stability of basalt fiber asphalt mixture increases with aging time, the increase range of basalt fiber asphalt mixture is slower than that of ordinary asphalt mixture. Basalt fiber delayed the decay of asphalt mixture aging performance and improved the low temperature crack resistance of asphalt mixture after aging. The water stability of basalt fiber asphalt mixture was better than that of ordinary asphalt mixture after short-term aging and long-term aging. The basalt fiber obviously reduces the unfreezing and thawing splitting strength of the long-term aging specimen, so the rolling times should be increased properly in the application.
【作者单位】：长安大学材料科学与工程学院;长安大学公路学院;
【基金】：国家自然科学基金(51108038;51108039) 中央高校基本科研业务费专项资助项目(310821152004) 陕西省国际科技合作重点项目(2013KW24;2013kjxx-94)
【分类号】：U414

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