Micromechanics analysis of thermal expansion and thermal pressurization of a hardened cement paste

Details Micromechanics analysis of thermal expansion and thermal pressurization of a hardened cement paste Micromechanics analysis of thermal expansion and thermal pressurization of a hardened cement paste

2011-02-07

arxiv.org/abs/1102.1281v1

Cement and Concrete Research (2011)

Physics

Classical Physics

Scientific paper

10.1016/j.cemconres.2011.01.023

The results of a macro-scale experimental study of the effect of heating on a fluid-saturated hardened cement paste are analysed using a multi-scale homogenization model. The analysis of the experimental results revealed that the thermal expansion coefficient of the cement paste pore fluid is anomalously higher than the one of pure bulk water. The micromechanics model is calibrated using the results of drained and undrained heating tests and permits the extrapolation of the experimentally evaluated thermal expansion and thermal pressurization parameters to cement pastes with different water-to-cement ratios. It permits also to calculate the pore volume thermal expansion coefficient f a which is difficult to evaluate experimentally. The anomalous pore fluid thermal expansion is also analysed using the micromechanics model.

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