沥青混合料动态模量预估模型研究

动态模量是描述沥青混合料动态性能的主要参数,众所周知路面荷载是典型的冲击动态荷载。而我国现在采用的参数是静态弹性模量,因此在路面设计时有必要引入动态模量。动态模量可以通过试验测定,本文介绍了利用预估模型进行计算的方法,介绍了Witczak、Hirsch、New Witczak、韩国Lee等预估模型,用这些模型计算出动态模量的预估值,并把这些预估值和试验值进行了比较、评价,认为Hirsch模型优于其他模型,最后做了原因分析,并提出研究建议。

Research on Dynamic Modulus Predictive Models of Bituminous Mixture

Dynamic modulus is the key parameters that describe bituminous mixture dynamic characters.It is well known that the road load is concussion load.The parameter used in China is E,so it is necessary to introduce the dynamic modulus in the road design.The modulus can be got from experiments and through predictive models.The predictive models appeared in recently year are introduced,the predictive values of dynamic modulus are calculated using these models and compared with the values of dynamic modulus got from the dynamic modulus tests.The results show that the Hirsch model is the best of all,the reasons of the conclusion are analyzed and the several trends on the research are presented.