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首页> 外文会议>Fourth European Symposium on Performance of Bituminous and Hydraulic Materials in Pavements, Apr 11-12, 2002, Nottingham, United Kingdom >Linear and non-linear rheological properties of asphalt mixtures
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Linear and non-linear rheological properties of asphalt mixtures

机译：沥青混合料的线性和非线性流变特性

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摘要

The paper describes the use of a purpose built hydraulic tension-compression apparatus to investigate the linearity limits and linear viscoelastic (LVE) rheological characteristics of a range of unmodified and modified (polymer and process) asphalt mixtures. The asphalt mixtures consist of dense bitumen macadam (DBM), hot rolled asphalt (HRA) and HRA mortar mixtures with conventional 50 pen bitumen, radial and linear SBS PMBs, EVA PMB and multigrade bitumen. Cylindrical specimens of the mixtures were subjected to sinusoidal loading conditions at temperatures between 10 and 40℃, firstly, under stress sweep conditions and, secondly, under frequency sweep conditions. The results indicate that the linearity limits of behaviour for the asphalt mixtures were strain dependant and found to be between 20 and 100 microstrain for the DBM and HRA mixtures and between 50 and 150 microstrain for the HRA mortars. In general, the LVE rheological characteristics of the asphalt mixtures were similar with differences in complex modulus and phase angle only being found at intermediate temperatures and frequencies and attributed to the unique rheological characteristics of the binders.
机译：本文介绍了使用专用液压拉伸压缩装置研究一系列未改性和改性（聚合物和加工）沥青混合物的线性极限和线性粘弹性（LVE）流变特性。沥青混合物由致密沥青碎石（DBM），热轧沥青（HRA）和HRA灰浆混合物以及常规的50笔沥青，径向和线性SBS PMB，EVA PMB和多级沥青组成。混合物的圆柱试样首先在应力扫描条件下，然后在频率扫描条件下，在10至40℃的温度下经受正弦加载条件。结果表明，沥青混合料的线性行为极限与应变有关，DBM和HRA混合料的线性极限在20到100微应变之间，HRA砂浆的线性极限在50到150微应变之间。通常，沥青混合料的LVE流变特性是相似的，只是在中间温度和频率下才发现复数模量和相角不同，这归因于粘合剂的独特流变特性。

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