Simulation of the Autogenous Shrinkage of Slag Cement Paste in Microscale

Author(s): Peng Gao, Guang Ye, Jiangxiong Wei, Qijun Yu
Paper category: Proceedings
Book title: 3rd International RILEM Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): Changwen Miao, Wei Sun, Jiaping Liu, Huisu Chen, Guang Ye and Klaas van Breugel
Print-ISBN: 978-2-35158-188-9
e-ISBN: 978-2-35158-189-6
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 141-148
Total Pages : 8
Language : English

Abstract: Slag (blast furnace slag) cement-based materials are widely used in concrete structures due to their low CO2 emission and high durability. The blending of slag changes the properties of cementitious system, such as autogenous shrinkage. The simulation of the autogenous shrinkage of cement-based materials is increasing concerned. The current autogenous shrinkage models didn’t illustrate the local deformation of the microstructure. Moreover, few numerical models concerned the autogenous shrinkage of slag cement-based materials.
This paper propose a numerical model to simulate the autogenous shrinkage of slag cement paste. The hydration and microstructure of slag cement paste are simulated based on numerical cement hydration model, HYMOSTRUC3D. The self-desiccation process in the cement paste is simulated by a pore-morphology based method. The local deformation due to the imposing of the driving force of autogenous shrinkage is simulated by a lattice finite element analysis method. The pure Portland cement paste with water to cement ratio of 0.30 and slag cement paste with water to cement ratio of 0.31 and slag content of 28% are used to validate the proposed model. The autogenous shrinkages of cement pastes obtained by experiment are in a good agreement with that obtained by simulation.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00

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