文章摘要
微纳米砖砼垃圾改性沥青及其混合料的路用性能研究
Study on Road Performance of Micro-nano Brick and Concrete Garbage Modified Asphalt and Its Mixture
投稿时间：2019-07-16  修订日期：2019-11-01
DOI：
中文关键词: 道路工程,改性沥青,微纳米材料,砖砼垃圾,路用性能
英文关键词: Road  engineering, Modified  asphalt, Micro-nano  material, Brick  and concrete  trash,Road  performance
基金项目:国家自然科学(No.51578076) 中央高校基本科研业务费专项资金(300102219207)
作者单位邮编
张琛 长安大学公路学院 710064
韩森* 长安大学公路学院 710064
尚为公 陕西交通建设养护工程有限公司 
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中文摘要:
      针对逐年提高的路面质量要求和大量的废旧建筑垃圾材料浪费的现象，本研究提出将建筑垃圾中的砖、砼类细料部分进行碾压、研磨并加工成微纳米级别，并将其作为改性剂加入到基质沥青中，利用纳米材料的特殊性能达到改善沥青并减少沥青用量的作用。本研究采用针入度，延度、软化点、粘度和动态剪切流变等试验测试并验证改性沥青的高、低温性能；采用车辙实验、低温弯曲蠕变实验、冻融劈裂实验以及浸水马歇尔实验分别验证改性沥青混合料的高、低温性能和水稳定性。所得实验结果表明：改性沥青中，微纳米砖砼垃圾材料能够改善其高温性能，且在10%掺配比时效果最佳；混合料中，微纳米砖砼垃圾材料能显著提高其高温稳定性和水稳定性，其中动稳定度提高达60.2%、残留稳定度与劈裂强度比分别提高达13.8%和24%。由此可见，微纳米砖砼垃圾能够有效提高沥青及其混合料的路用性能。
英文摘要:
      In order to improve the pavement quality requirements and the waste of waste asphalt materials year by year, this study proposes to crush, grind and process the fine parts of bricks and mixes in construction waste into micro-nanoscale, and add it as a modifier to the matrix asphalt.Utilizing the special functions of nanomaterials to improve asphalt performance and reduce the amount of asphalt.This study used penetration, ductility, softening point and DSR test to test and verify the high and low temperature properties of modified asphalt.The rutting test, low temperature bending creep test, freeze-thaw splitting test and water-immersed Marshall test were used to verify the high temperature performance, low temperature performance and water stability of the modified asphalt mixture.The experimental results show that the micro-nano bricks and concrete waste materials can effectively improve its high temperature performance and have the best effect at 10% blending ratio. In the mixture, the micro-nano bricks and concrete waste materials can significantly improve its high temperature stability and water stability, and the dynamic stability is improved by 60.2%, and the residual stability and splitting strength ratio are increased by 13.8% and 24%, respectively. It can be seen that micro-nano bricks and concrete waste can effectively improve the road performance of asphalt and its mixture.
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