Chemo-Mechanical Effects in Mortar Beams Subjected to Water Hydrolysis
Chemo-Mechanical Effects in Mortar Beams Subjected to Water Hydrolysis
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DOI：
10.1061/(asce)0733-9399(2000)126:3(266
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发表时间：
2000-03
期刊：
影响因子：
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通讯作者：
C. L. Bellégo;B. Gérard;G. Pijaudier-Cabot
中科院分区：
文献类型：
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作者：
C. L. Bellégo;B. Gérard;G. Pijaudier-Cabot
对混凝土结构长期行为的可靠预测既需要准确了解影响结构在其使用寿命期间的各种退化机制，也需要使用模拟工具。腐蚀性水造成的浸出可能会导致混凝土结构的机械性能和稳定性损失。本文重点研究了混凝土结构在侵蚀性水诱导钙浸出过程中的化学-机械耦合效应。详细介绍了砂浆弯曲梁的实验研究及其分析。从这些测试中推断出浸出砂浆梁的响应。研究发现，随着化学侵蚀的进行，砂浆的刚度和强度都会降低。通过实验研究了几何形状相似的弯曲梁在不同退化阶段的尺寸效应。由于浸出，结构的脆性增加，断裂能降低。
Reliable predictions of the long-term behavior of concrete structures require both an accurate knowledge of the various degradation mechanisms that affect the structures over their lifetime and the use of simulation tools. Leaching due to aggressive water can be responsible for a loss of mechanical properties and stability of concrete structures. This paper focuses on coupled chemo-mechanical effects on concrete structures subjected to aggressive water inducing calcium leaching. Experimental investigations on mortar bending beams and their analysis are detailed. The response of leached mortar beams is deduced from these tests. It is found that the stiffness of mortar decreases, along with its strength, as the chemical attack progresses. The size effect on geometrically similar bending beams at various stages of degradation is studied experimentally. Due to leaching, the brittleness of the structures is increased and the fracture energy decreases.