Prediction of autogenous shrinkage of cement pastes
A new paper presents predictions of autogenous shrinkage for three cement pastes of different compositions.
First only the poro-elastic deformation is considered and then including also the poro-visco-elastic response. The study used experimentally-determined parameters for the material properties of both the elastic and the visco-elastic components, which ensured the reliability of the calculations.
Prediction of the poro-visco-elastic response
The prediction of the poro-visco-elastic response of the material to the internal stress was performed using a generalised Kelvin-Voigt model that also considered aging. It is found that, while the poro-elastic calculations systematically underestimates the measured shrinkage, predictions with the inclusion of the viscous response overestimates the shrinkage.
The study is published in: Cement and Concrete Research Volume 126, December 2019, 105917.
