摘要
沥青的临界开裂温度是AASHTO Mp1a规范提出的沥青低温评价指标,是根据弯曲梁流变仪和直接拉伸仪的结果经过数据回归计算得到的。按照沥青临界开裂温度的计算过程进行了试验,并对结果进行了分析;对沥青的劲度模量主曲线的拟合模型进行了研究,分析了降温速率和收缩系数对沥青临界开裂温度的影响,结果表明计算临界开裂温度的方法需要进一步改善。
The critical cracking temperature of asphalt is the low temperature evaluation index of AASHTO Mpla criterion, which is calculated based on the results of bending beam rheometer and the direct tension test. In this paper, the method calculating the critical cracking temperature is analyzed, which comprises the fitting model to stiffness modulus master curve of asphalt, and the effects of cooling rate and contraction coefficient on the result of the critical cracking temperature. The results show that the method of the critical cracking temperature is needed to be improved further.
出处
《公路》
北大核心
2007年第3期125-128,共4页
Highway
关键词
低温性能
临界开裂温度
劲度模量
降温速率
收缩系数
low temperature performance
critical cracking temperature
stiffness modulus
cooling rate
contraction coefficient
