寒区沥青混合料抗压强度影响因素  

Influencing Factors of Compression Strength of Asphalt Mixture in Cold Region

作　　者：韦佑坡[1,2] 马骉[2] 司伟[2] 

机构地区：[1]河南省交通科学技术研究院有限公司,河南郑州450006 [2]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《公路交通科技》2012年第4期19-22,33,共5页Journal of Highway and Transportation Research and Development

基　　金：交通运输部西部交通建设科技项目(200931800009);中交寒区道路工程重点实验室开放基金项目(HSKF2007-04)

摘　　要：针对寒区低温特点,对沥青混合料进行室内单轴压缩试验,分析温度、油石比、沥青种类和级配对混合料抗压强度的影响。结果表明,混合料抗压强度随温度的升高而降低;对比不同最大公称粒径的沥青混合料的抗压强度可知,SBR改性AC-16混合料的抗压强度高于AC-13;存在对应于抗压强度达到最大值时的最佳油石比,约在6.0%～7.0%之间;SBR改性沥青混合料的低温抗压性能明显优于130#道路石油沥青混合料。混合料抗压强度值的对数与温度及油石比的关系符合二元一次函数关系。用SPSS相关分析方法分析各影响因素对混合料抗压特性的影响程度可知,温度和沥青种类对抗压强度影响较大。Aimed at the climate feature of low temperature in cold region, the influence of temperature, asphalt-aggregate ratio, asphalt types and aggregate gradation on the compression strength of asphalt mixture was analysed by indoor uniaxial compression test. The results show that （ 1 ） the compressive strength become lower with the increase of temperature; （2） based on comparing strengths of asphalt mixture in different nominal maximum sizes of aggregate, the compression strength of SBR modified AC-16 asphalt mixture is better than that of AC-13 ; （3） corresponds to maximum compressive strength of asphalt mixture, there exists the optimum asphalt-aggregate ratio between 6. 0% -7.0% ; （4） the compressive properties of SBR modified asphalt mixture is superior to that of paving asphalt mixture No. 100 under low temperature; （5） the relation of the logarithm of the compression strength with temperature and asphalt-aggregate ratio approximately obeys two-variable linear function. The results also revealed that temperature and asphalt types have greatly affect on compression strength of asphalt mixture among influencing factors based on correspondence analysis of SPSS.

关 键 词：道路工程 沥青混合料 寒区 抗压强度 温度 

分 类 号：U414.75[交通运输工程—道路与铁道工程]