磁铁矿粉/活性炭粉复合沥青胶浆路用性能试验研

关键字：道路工程,沥青胶浆,磁铁矿粉,活性炭粉,路用性能

    摘要：制备不同复合比例磁铁矿粉/活性碳粉复合沥青胶浆，测试了沥青胶浆的低温性能、高温性能、抗剪强度和感温性能，并分析磁铁矿粉/活性炭粉对沥青胶浆性能的改善效果。结果表明：随着磁铁矿粉/活性碳粉掺和比例减小，沥青的高温性能显著提高，但其低温性能有一定程度降低，建议磁铁矿粉/活性炭粉复合比例宜大于60∶40；沥青胶浆锥入度敏感系数与黏温指数呈一致性变化规律；活性炭粉的掺入显著降低了沥青胶浆的温度敏感性。
    关键词：道路工程；沥青胶浆；磁铁矿粉；活性炭粉；路用性能
    中图分类号：TU528.42        文献标识码：A        文章编号：1001-702X（2017）06-0031-04

Investigation on road performance of asphalt mortar composited with magnetite powder/activated carbon powder
WANG Xiaowen1，WANG Xiaolei1，LIU Ziming1，SUN Shiwei1，XIONG Rui1，CHEN Huaxin1，
ZHANG Sandong2，CAI Yuan1
（1.School of Materials Science and Engineering，Chang'an University，Xi'an 710061，China；2.Zhangye Geo-mine Survey Instisute of Non-ferrous Metal Geological Exploration Bureau of Gansu Province，Zhangye 734000，China）

    Abstract：The asphalt mortar composited with different proportion of magnetite/activated carbon was prepared，low temperature performance，high temperature performance，shear strength and temperature susceptibility were tested. And magnetite powder/activated carbon powder for the effects of improving the performance of asphalt mortar was analyzed. The results show that high temperature performance of asphalt mortar was significantly improved with decrease of the magnetite powder/activated carbon composite ratio，however，its low temperature performance was reduced to a certain extent，thus it was suggested composite ratio larger than 60∶40. Cone penetration of asphalt mortar sensitive coefficient and viscosity temperature index showed a consistent change rules. The incorporation of activated carbon powder significantly reduced the temperature sensitivity of asphalt mortar.
    Key words：road engineering，asphalt mortar，magnetite，active carbon powder，road properties