Improved understanding of grouted mixture fatigue behavior under indirect tensile test configuration
Improved understanding of grouted mixture fatigue behavior under indirect tensile test configuration
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DOI：
10.1016/j.conbuildmat.2017.08.048
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发表时间：
2017-11
影响因子：
7.4
通讯作者：
A. Corradini;G. Cerni;A. D’Alessandro;F. Ubertini
中科院分区：
文献类型：
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作者：
A. Corradini;G. Cerni;A. D’Alessandro;F. Ubertini
本文重点研究灌浆混合料的长期性能，灌浆混合料是一种相对较新的路面材料，它由一种空隙用水泥砂浆填充的开级配沥青混凝土组成。其特有的特性，取决于配合比设计和填充水平，诱导其力学行为的可变性。本文的目的是了解这种变异性如何影响材料的疲劳性能，在间接拉伸试验配置。试验结果表明，刚度特性对疲劳寿命有显著影响。根据这一观察结果，灌浆混合物的疲劳行为描述通过一个新的分析模型，它明确地介绍了对刚度模量的疲劳寿命的依赖。对比分析表明，所提出的分析模型显着优于传统的疲劳模型的特殊类型的复合路面系统的调查。
This paper focuses on the long-term performance of a grouted mixture, a relatively new pavement material which consists of an open grade asphalt concrete whose voids are filled with cement mortar. Its peculiar characteristics, depending on mix design and level of filling, induce a variability of its mechanical behavior. The purpose of this paper is understanding how such variability affects the fatigue properties of the material, under indirect tensile test configuration. Experimental results have revealed a remarkable influence of stiffness properties on fatigue life. Following this observation, the fatigue behavior of grouted mixture is described through a new analytical model, which explicitly introduces the dependence of the fatigue life on the stiffness modulus. Comparative analysis demonstrates that the proposed analytical model significantly outperforms traditional fatigue modeling for the peculiar type of investigated composite pavement system.