Micromechanics-based analysis for predicting asphalt concrete modulus  

作　　者：Xing-yi ZHU Zhi-yi HUANG Zhong-xuan YANG Wei-qiu CHEN 

机构地区：[1]Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China [2]Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2010年第6期415-424,共10页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：supported by the National Natural Science Foundation of China (Nos. 10725210 and 50808159);the National Basic Re-search Program (973) of China (No. 2009CB623204)

摘　　要：The elastic modulus of asphalt concrete(AC) is an important material parameter for pavement design.The prediction and determination of elastic modulus,however,largely depends on laboratory tests which cannot reflect explicitly the influence of the microstructure of AC.To this end,a micromechanical model based on stepping scheme is adopted.Consideration is given to the influence of interfacial debonding and interlocking effect between the aggregates and asphalt mastic using the concept of effective bonding.Tests on asphalt mixture with various microstructures are conducted to verify the proposed approach.It is shown that the prediction is generally in agreement with experimental results.Parameters affecting the elastic modulus of AC are also discussed in light of the proposed method.The elastic modulus of asphalt concrete （AC） is an important material parameter for pavement design. The prediction and determination of elastic modulus, however, largely depends on laboratory tests which cannot reflect explicitly the influence of the microstructure of AC. To this end, a micromechanical model based on stepping scheme is adopted. Consideration is given to the influence of interracial debonding and interlocking effect between the aggregates and asphalt mastic using the concept of effective bonding. Tests on asphalt mixture with various microstructures are conducted to verify the proposed approach. It is shown that the prediction is generally in agreement with experimental results. Parameters affecting the elastic modulus of AC are also discussed in light of the proposed method.

关 键 词：Asphalt concrete(AC) MICROMECHANICS Microstructure Effective bonding Optimum design Elastic modulus 

分 类 号：TU528.37[建筑科学—建筑技术科学]