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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。
Dynamic modulus is the main parameter to describe the dynamic performance of asphalt mixture. It is known that pavement load is a typical impact dynamic load. The parameters used in our country are static elastic modulus, so it is necessary to introduce dynamic modulus in the pavement design. The dynamic modulus can be determined experimentally. In this paper, we introduce the methods to calculate using the predictive model. The prediction models such as Witczak, Hirsch, New Witczak and Lee of South Korea are introduced. With these models, the predictive value of dynamic modulus is calculated. After comparing and evaluating these estimations with the experimental values, we conclude that the Hirsch model is superior to other models, and finally analyze the causes and put forward the research proposals.