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Simulation of the Influence of Intrinsic C-S-H Aging on Time-Dependent Relaxation of Hydrating Cement Paste

Published

Author(s)

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

Abstract

A numerical model has been developed that combines finite element methods with microstructure development algorithms to quantitatively predict the stress relaxation of cement paste due to intrinsic calcium silicate hydrate (C- S-H) viscoelasticity/viscoplasticity and cement grain dissolution associated with the hydration process. The material model for the C-S-H incorporates intrinsic aging with respect to the mechanical constitutive behavior. The simulation results of virtual stress relaxation experiments suggest that when considering intrinsic C-S-H aging together with C- S-H viscoelasticity, the time-dependent mechanical properties of C-S-H phases are capable of generating the aging effect of cement paste, and can become a significant mechanism leading to the overall relaxation of cement paste, especially at later ages.
Citation
Construction and Building Materials
Volume
157

Keywords

viscoelastic, finite element analysis, dissolution, microstructure, cement paste, aging

Citation

Li, X. , Grasley, Z. , Garboczi, E. and Bullard, J. (2017), Simulation of the Influence of Intrinsic C-S-H Aging on Time-Dependent Relaxation of Hydrating Cement Paste, Construction and Building Materials, [online], https://doi.org/10.1016/j.conbuildmat.2017.09.178 (Accessed May 24, 2024)

Issues

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Created December 29, 2017, Updated October 12, 2021