Prediction of Elastic Properties of Cementitious Materials Based on Multiphase and Multiscale Micromechanics Theory
Publication: Journal of Engineering Mechanics
Volume 145, Issue 10
Abstract
Prediction of the elastic properties of cementitious materials has been the aim of many researchers. This study developed a new multiscale and multiphase model based on the Mori-Tanaka method for predicting effective elastic properties of hardened cement paste, such as modulus of elasticity. The model considered the microstructural variation in and nonspherical morphology of the hydration products in hardened cement paste. In order to improve prediction accuracy, the model included the effect of ettringite on the elastic properties in addition to the other major hydration products. Instead of considering cement clinker as an isotropic and homogeneous material, this study simulated the clinker as a four-phase composite. In addition, the model used a matrix-inclusion configuration that can include the clinker and ultra-high-density calcium silicate hydrate. Another improvement is that a weakened matrix-inclusion interface was introduced using the modified Eshelby tensor. The prediction results of the model were compared with the experimental data, and good agreement was obtained.
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Acknowledgments
The authors wish to acknowledge the partial support of the US Department of Energy (DOE DE-NE0000659) to University of Colorado at Boulder. Opinions expressed in this paper are those of the authors and do not necessarily reflect those of the sponsor.
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©2019 American Society of Civil Engineers.
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Received: Sep 11, 2018
Accepted: Feb 11, 2019
Published online: Jul 24, 2019
Published in print: Oct 1, 2019
Discussion open until: Dec 24, 2019
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