东南大学学报（英文版）Issue(3)：294-299,6.DOI:10.3969/j.issn.1003-7985.2013.03.012
基于改进型 overlay tester沥青混合料的断裂试验
Development of overlay tester for fracture test of asphalt mixture
摘要
Abstract
To determine the fracture characteristics of asphalt mixture a novel fracture test with modified loading modes loading fixtures and the control system of the conventional overlay tester is implemented by the asphalt material performance tester AMPT .In order to evaluate the validity of the proposed fracture test four different loading rates including 1 2 3 and 4 mm/min are examined in the AMPT. The results indicate that the fracture behavior is similar to creep at a low loading rate and does not show significant marginal tail extension at a high loading rate.It clearly shows the phase of crack initiation crack propagation and fracture at a loading rate of 3 mm/min. Besides eight fracture parameters such as fracture energy tensile strength and tensile modulus are applied to evaluate the fracture characteristics of asphalt mixture.Development of the overlay tester for the fracture test of asphalt mixture can be considered as a new fracture test of asphalt mixture.关键词
沥青混合料/断裂试验/overlay tester/沥青混合料性能试验机/断裂参数Key words
asphalt mixture/fracture test/overlay tester/asphalt material performance tester(AMPT)/fracture parame-ter分类
交通工程引用本文复制引用
李兴海,黄卫,钱振东..基于改进型 overlay tester沥青混合料的断裂试验[J].东南大学学报（英文版）,2013,(3):294-299,6.基金项目
The National Natural Science Foundation of China(No．51178114) the Chinese Western Transportation Construction Technology Project of Transportation Ministry (No．2009318000086)． （No．51178114）
