Simulation of the Influence of Intrinsic C-S-H Aging on Time-Dependent Relaxation of Hydrating Cement Paste
Xiaodan Li, Zachary Grasley, Edward Garboczi, Jeffrey W. Bullard
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.
, Grasley, Z.
, Garboczi, E.
and Bullard, J.
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 November 29, 2023)