Incorporating elastic and creep deformations in modelling the three-dimensional autogenous shrinkage of cement paste

Journal article (2022)

Authors

Peng Gao Hefei University of Technology, South China University of Technology

Haoliang Huang Guangdong Low Carbon Technologies Engineering Centre for Building Materials, South China University of Technology

Zhiwei Qian FEMRIS

E. Schlangen Materials and Environment -

Jiangxiong Wei South China University of Technology, Guangdong Low Carbon Technologies Engineering Centre for Building Materials

Qijun Yu South China University of Technology, Hefei University of Technology

Research Group

Materials and Environment () (TU Delft)

DOI: https://doi.org/10.1016/j.cemconres.2022.106907

Lattice fracture model Autogenous shrinkage Effective stress Effective modulus Three-dimensional

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Published Date

2022

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

A structure-based modelling framework was established to simulate the three-dimensional autogenous shrinkage of cement paste. A cement hydration model, HYMOSTRUC3D-E, was used to obtain the microstructures and ionic concentrations of the cement paste. A lattice fracture model based on the effective stress and effective modulus was used to consider the elastic and creep parts of autogenous shrinkage. For Portland cement pastes with water-to-cement ratios of 0.3 and 0.4 (where the time zero of autogenous shrinkage was set as the time of the drop in internal relative humidity), the simulated linear elastic autogenous shrinkage was respectively −188 and −79 μm/m at 160 h. The obtained linear total autogenous shrinkage including elastic and creep deformations was respectively −501 and −236 μm/m at 160 h. These values of the elastic autogenous shrinkage and total autogenous shrinkage are close to the predications of poromechanical models and experimental data obtained using a corrugated tube.

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