Simulation of the diffusivity of cement paste subjected to uni-axial tensile load by a 3D lattice approach

Author(s): Lin Liu, Wei Sun, Huisu Chen, Guang Ye
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 1054 - 1062
Total Pages: 8
Language: English

On the basis of the microstructural change of cement paste during a virtual uni-axial tensile test, the diffusivity of cement paste is predicted by use of a 3D lattice approach in this study. Based on an original microstructure of cement paste generated by the HYMOSTRUC3D model, the fracturing process of cement paste during a virtual uni axial tensile test is simulated and the creation of micro-cracks are captured by use of 3D lattice fracturing model. A 3D diffusive lattice network is generated from the cracked cement paste where the diffusion coefficient of crack phase is assumed to equal to that of pore phase. By simulation of a virtual steady-state chloride diffusion test on the diffusive lattice network, the diffusion coefficient of cement paste subjected to tensile load can be predicted. Simulations have shown that a sharp increase of diffusivity takes place after the maximum load is reached in the uni-axial tensile test.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00

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