Poromechanical behaviour of hardened cement paste under isotropic loading

被引：109
|
作者：
Ghabezloo, Siavash [1 ]
Sulem, Jean [1 ]
Guedon, Sylvine [2 ]
Martineau, Francois [2 ]
Saint-Marc, Jeremie [3 ]
机构：
[1] Univ Paris Est, Ecole Natl Ponts & Chaussees, CERMES, UR Navier, F-77455 Champs Sur Marne 2, Marne La Vallee, France
[2] Univ Paris Est, LCPC, MSRGI, Paris, France
[3] TOTAL, Management Residual Gases Project, Pau, France
来源：
CEMENT AND CONCRETE RESEARCH | 2008年 / 38卷 / 12期
关键词：
Hardened cement paste; Poromechanics; Effective stress; Degradation; Triaxial testing;
D O I：
10.1016/j.cemconres.2008.06.007
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The poromechanical behaviour of hardened cement paste under isotropic loading is studied on the basis of an experimental testing program of drained, undrained and unjacketed compression tests. The macroscopic behaviour of the material is described in the framework of the mechanics of porous media. The poroelastic parameters of the material are determined and the effect of stress and pore pressure on them is evaluated. Appropriate effective stress laws which control the evolution of total volume, pore volume, solid volume, porosity and drained bulk modulus are discussed. A phenomenon of degradation of elastic properties is observed in the test results. The microscopic observations showed that this degradation is caused by the microcracking of the material under isotropic loading. The good compatibility and the consistency of the obtained poromechanical parameters demonstrate that the behaviour of the hardened cement paste can be indeed described within the framework of the theory of porous media. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1424 / 1437
页数：14
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