摘要
数值试验中无法准确实现温度对沥青混合料性能的影响,这对数值试验的推广带来了较大阻碍。为研究试验温度对沥青混合料的影响,选用沥青混合料的单轴贯入数值试验,研究了温度的变化对单轴贯入数值试验模型参数的影响,主要包括平行粘结强度和刚度等微力学参数;此外,研究了数值试验与室内试验的相关性,并分析了不同温度对力学参数的影响。研究表明:温度对平行粘结强度、沥青砂浆刚度和粘结层平行粘结刚度具有显著影响,温度的升高会降低平行粘结强度和沥青砂浆刚度,但对粘结层平行粘结刚度有提升作用。室内试验表明数值试验具有较好的可靠性,误差小于5%。
The influence of temperature on the performance of asphalt mixtures cannot be accurately realized in numerical tests, which poses a major obstacle to the extension of numerical tests. In order to study the effect of test temperature on asphalt mixture, the uniaxial penetration numerical test of asphalt mixture was selected to investigate the effect of temperature variation on the model parameters of uniaxial penetration numerical test, mainly including micromechanical parameters such as parallel bond strength and stiffness;in addition, the correlation between numerical test and indoor test was studied and the effect of different temperatures on mechanical parameters was analyzed. The study shows that temperature has significant effects on parallel bond strength, asphalt mortar stiffness and parallel bond stiffness of the bond layer, and the increase of temperature decreases parallel bond strength and asphalt mortar stiffness, but enhances parallel bond stiffness of the bond layer. The indoor tests showed that the numerical tests had good reliability with an error of less than 5%.
作者
何岩
苏洪建
蒋应军
He Yan;Su Hongjian;Jiang Yingjun(Xuchang Highway Business Development Center,Xuchang 461670,China;School of Highway,Chang'an University,Xi'an 710064,China)
出处
《科学技术创新》
2022年第13期153-156,共4页
Scientific and Technological Innovation
关键词
道路工程
沥青混合料
温度
数值试验
单轴贯入试验
模型参数
Road engineering
Asphalt mixture
Temperature
Numerical test
Uniaxial penetration test
Model parameters
