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Modeling the apparent and intrinsic viscoelastic relaxation of hydrating cement paste

Published

Author(s)

Xiaodan Li, Zachary Grasley, Edward Garboczi, Jeffrey W. Bullard

Abstract

Finite element procedures combined with microstructure development modeling are integrated to quantitatively predict the viscoelastic/viscoplastic relaxation of cement paste due to intrinsic calcium silicate hydrate viscoelasticity and microstructure evolution associated with the hydration process. The combined models are implemented in a computational routine to predict time-dependent stress and strain fields in cement paste. The model simulations suggest that inherent viscoelastic deformation caused by calcium silicate hydrate is not necessarily the primary mechanism leading to the overall early-age viscoelastic/viscoplastic behavior of cement paste. The effect of time-dependent dissolution of cement grains occurring during the hydration process is substantial and should be considered as a significant mechanism for the apparent viscoelasticity/viscoplasticity of cement paste.
Citation
Cement and Concrete Composites
Volume
55

Keywords

C-S-H, Viscoelastic, FEM, Dissolution, THAMES, microstructure

Citation

Li, X. , Grasley, Z. , Garboczi, E. and Bullard, J. (2015), Modeling the apparent and intrinsic viscoelastic relaxation of hydrating cement paste, Cement and Concrete Composites, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=913904 (Accessed April 19, 2024)
Created January 30, 2015, Updated October 12, 2021