电气石改性沥青混合料路用性能

发布时间：2018-01-05 08:23

本文关键词：电气石改性沥青混合料路用性能　出处：《长安大学学报(自然科学版)》2014年02期 　论文类型：期刊论文

【摘要】：为深入研究电气石类型、掺量对改性沥青混合料路用性能的影响,将经过表面改性的电气石加入到基础沥青中,采用高速剪切法制备电气石改性沥青,借助扫描电镜试验(SEM)分析电气石与沥青的相容性;将电气石改性沥青应用到GAC沥青混合料中,通过高温车辙试验、低温小梁弯曲试验、浸水马歇尔试验、冻融劈裂试验以及疲劳试验等,系统研究电气石类型与掺量对沥青混合料高温性、低温抗裂性、水稳定性以及抗疲劳性等路用性能的影响规律,并应用疲劳方程对疲劳试验结果进行回归分析。研究结果表明:电气石与沥青相容性良好;电气石能改善沥青混合料的高温、低温、水稳定性及抗疲劳性等路用性能;对于不同类型电气石,325目电气石改性沥青混合料的高温性能和水稳定性能优于5 000ions(5 000离子)电气石负离子粉改性沥青混合料,而5 000ions电气石负离子粉改性沥青混合料的低温性能和抗疲劳性能较好。
[Abstract]:In order to study the type of tourmaline and the effect of the amount of tourmaline on the pavement performance of modified asphalt mixture, the surface modified tourmaline was added to the base asphalt, and the tourmaline modified asphalt was prepared by high-speed shear method. The compatibility of tourmaline and asphalt was analyzed by SEM. Tourmaline modified asphalt was applied to GAC asphalt mixture through high temperature rutting test, low temperature trabecular bending test, immersion Marshall test, freeze-thaw splitting test and fatigue test. The effects of tourmaline type and content on asphalt mixture performance such as high temperature, low temperature crack resistance, water stability and fatigue resistance were studied systematically. The fatigue test results are analyzed by using fatigue equation. The results show that tourmaline has good compatibility with asphalt. Tourmaline can improve the performance of asphalt mixture such as high temperature, low temperature, water stability and fatigue resistance. For different types of tourmaline modified asphalt mixture, the high temperature performance and water stability of tourmaline modified asphalt mixture are better than that of 5 000 ionized ion) tourmaline negative ion powder modified asphalt mixture. The low temperature performance and fatigue resistance of 5 000 ions tourmaline negative ion powder modified asphalt mixture are better.
【作者单位】：长安大学道路结构与材料交通行业重点实验室;石家庄市交通运输局;
【基金】：国家自然科学基金项目(51208045) 高等学校博士学科点专项科研基金项目(20110205120007) 交通运输部建设科技项目(201331849A270)
【分类号】：U414.75
【正文快照】： 0引言近年来,无机微粉改性沥青混合料越来越受到道路研究者的青睐。以硅藻土、蒙脱土、碳黑、玻璃纤维、石棉以及木质纤维等为代表的无机类改性沥青路面材料在国内外已有一定研究[1-3]。无机材料改性剂不仅可以改善沥青与矿料的界面作用,满足沥青路用性能的要求,同时具有生产

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