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论文类型：期刊论文

发表时间：2017-09-01

发表刊物：CONSTRUCTION AND BUILDING MATERIALS

收录刊物：SCIE、EI、Scopus

卷号：148

页面范围：723-733

ISSN号：0950-0618

关键字：Asphalt concrete; Random aggregate; Dynamic moduli; Statistic formula

摘要：Finite element models generating the random aggregate have been used to predict the dynamic moduli of the asphalt concrete materials. The asphalt concrete is modeled as a triphasic medium composed of granular inclusions with linear elastic properties, interfacial transition zone (ITZ) with linear elastic properties, and a porous matrix of bituminous mastics exhibiting linear viscoelastic behavior at small strain level. The predicted complex moduli of asphalt mixes from numerical approach are found close to that from the dynamic modulus tests, resulting in a good agreement. Meanwhile, the size effort of dynamic modulus for asphalt concrete material is investigated through nearly 30,000 times numerical examples, and a theoretical statistic formula for describing the size effort of dynamic modulus is proposed. The simulation results reveal that the theoretical statistic formula provides a suitable description for the size effort of dynamic modulus for asphalt concrete. (C) 2017 Elsevier Ltd. All rights reserved.