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A platform for research: civil engineering, architecture and urbanism
Numerical simulation of sulfate diffusivity in concrete under combination of mechanical loading and sulfate environments
This paper presents a two-dimensional model for sulfate diffusivity in concrete subjected to the combination of mechanical loading and sulfate environments, in which the time-dependent diffusion coefficients associated with concrete microstructure, external stress, and ionic concentration in pore solution are considered. Taking the concrete column in Na2SO4 solution subjected to white-noise excitations as an example, the variations of the sulfate ion concentration and the sulfate diffusivity with time in the concrete column section are numerically analyzed. The results show that, with the increase of time, the sulfate ion concentration in the concrete column section gradually increased to reach a plateau, in which the diffusion and reaction are in dynamical equilibrium. Under the random excitations, the sulfate ion concentration increases with the excitation amplitudes, and the ion diffusion coefficient in concrete changes randomly with the excitations and increases with its amplitudes.
Numerical simulation of sulfate diffusivity in concrete under combination of mechanical loading and sulfate environments
This paper presents a two-dimensional model for sulfate diffusivity in concrete subjected to the combination of mechanical loading and sulfate environments, in which the time-dependent diffusion coefficients associated with concrete microstructure, external stress, and ionic concentration in pore solution are considered. Taking the concrete column in Na2SO4 solution subjected to white-noise excitations as an example, the variations of the sulfate ion concentration and the sulfate diffusivity with time in the concrete column section are numerically analyzed. The results show that, with the increase of time, the sulfate ion concentration in the concrete column section gradually increased to reach a plateau, in which the diffusion and reaction are in dynamical equilibrium. Under the random excitations, the sulfate ion concentration increases with the excitation amplitudes, and the ion diffusion coefficient in concrete changes randomly with the excitations and increases with its amplitudes.
Numerical simulation of sulfate diffusivity in concrete under combination of mechanical loading and sulfate environments
Sun, Wei (author) / Zuo, Xiao-Bao (author)
Journal of Sustainable Cement-Based Materials ; 1 ; 46-55
2012-06-01
10 pages
Article (Journal)
Electronic Resource
English
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