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Tuesday, 28 January 2020
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Raw materials & technologies, Applications

Prediction of autogenous shrinkage of cement pastes

Friday, 13 December 2019

A new paper presents predictions of autogenous shrinkage for three cement pastes of different compositions.

Precise and robust predictions of autogenous shrinkage of high performance concrete are essential to limit self-induced stresses and cracking in modern concrete structures. Source: markspirit – stock.adobe.com.
Precise and robust predictions of autogenous shrinkage of high performance concrete are essential to limit self-induced stresses and cracking in mo...

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.

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