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首页> 外文会议>International Conference on Structural Integrity and Fracture, SIF 2002, Sep 25-27, 2002, Perth, Australia >The relation between porosity, chemical degradation and fracture characteristics in mortar structures
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The relation between porosity, chemical degradation and fracture characteristics in mortar structures

机译：砂浆结构的孔隙率，化学降解与断裂特性之间的关系

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摘要

The purpose of this paper is to quantify the influence of microstructural degradations, namely a variation of porosity, on the mechanical properties of heterogeneous quasi-brittle materials in civil engineering field (mortar, concrete). The study deals with this problem on a model mortar material (mortar + polystyrene beads). Experimental investigations on this material in compression, bending, emission acoustic measurements and their analysis are detailed. The experiments show that the elastic modulus, compressive strength and the maximal strength decrease with the mass density. The brittleness of the structures as well as the fracture energy (obtained by applying Bazant's size effect law) are decreased too. Comparison with leached mortar beams obtained by Le Bellego (2001) are also discussed.
机译：本文的目的是量化土木工程领域（砂浆，混凝土）中微观结构退化（即孔隙率变化）对异类准脆性材料的力学性能的影响。该研究在模型砂浆材料（砂浆+聚苯乙烯珠）上解决了这个问题。详细介绍了该材料在压缩，弯曲，发射声学测量中的实验研究及其分析。实验表明，弹性模量，抗压强度和最大强度随质量密度而降低。结构的脆性以及断裂能（通过应用Bazant的尺寸效应定律获得）也降低了。还讨论了与Le Bellego（2001）获得的浸出砂浆梁的比较。

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