沥青混合料永久变形评价指标

通过比较分析沥青混合料永久变形各种试验方法和评价指标的优缺点,指出目前用动稳定度评价指标的不足之处。基于压实理论分析,提出一种全新的评价指标———综合稳定指数,利用现有的车辙试验设备,给出了综合稳定指数的具体计算公式。该指标综合考虑了压实过渡期和压实稳定期的变形,能更好地评价沥青混合料的高温稳定性。通过分析综合稳定指数与力学指标劲度模量之间的相关性,建立了两者之间的关系模型,验证了综合稳定指数的合理性。

Permanent Deformation Evaluation Index of Asphalt Mixture

Through analyzing merit and shortcoming of different permanent deformation test method and evaluation index of asphalt mixture,it was found that dynamic stability evaluation index was not fit to evaluate permanent deformation of asphalt mixture.Based on the compaction theoretical analysis,authors put forward a new evaluation index-complex stability index to evaluate high-temperature stability of asphalt mixture comprehensively considering compaction period of transition and compaction stability period and gave the calculation formulas of complex stability index using present rutting test equipment.Authors built the correlation model between complex stability index and stiffness modulus,and proved the rationality of complex stability index.