Simple Three-Step Analytical Scheme for Prediction of Elastic Moduli of Hardened Cement Paste
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 11
Abstract
Owing to their importance to the structural analysis and evaluation of cement-based materials, it is essential to determine the mechanical properties of cement paste. This paper presents a simple three-step analytical scheme for predicting the elastic moduli of hardened cement paste. In this scheme, hardened cement paste is modeled as a multiphase composite material, composed of unhydrated cement, C-S-H, CH, and capillary pores and further represented by five two-phase composite spheres. The elastic moduli of hardened cement paste are obtained in terms of the volume fractions and elastic moduli of unhydrated cement, C-S-H, CH, and capillary pores by the three-step scheme. Finally, the validity of the three-step scheme is verified with three independent sets of experimental data. The paper concludes that, when the water-cement ratio is in the range of 0.4–0.6, the simple three-step analytical scheme presented in the paper can predict the elastic moduli of hardened cement paste with an average relative error smaller than 8%.
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Acknowledgments
The financial support from the National Basic Research Program (973 Program) with Grant No. UNSPECIFIED2009CB623200 and the National Natural Science Foundation with Grant Nos. NNSFC50878196 and NNSFC50838008 of the People’s Republic of China is greatly acknowledged. All reviewers’ constructive comments and suggestions are gratefully appreciated.
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Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 11 • November 2010
Pages: 1191 - 1194
Copyright
© 2010 ASCE.
History
Received: Feb 15, 2009
Accepted: Mar 17, 2010
Published online: Mar 22, 2010
Published in print: Nov 2010
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