An Internal Expansive Stress Model of Concrete under Sulfate Attack
Concrete experiences expansive deformation during sulfate attack due to internal expansive stress. Sulfate ions enter concrete pores, react with the pore solution, and produce ettringite. The production of ettringite explains the internal expansive stress that reduces the durability of concrete. In this study, the model of internal expansive stress was achieved through the Eshelby’s theory, as well as the experimental results for concrete erosion. Numerical simulation indicated that internal expansive stress is not only determined by the water-to-cement ratio of concrete and the concentration of sulfate solution, but also affected by the relaxation time of concrete.
Key Wordsconcrete viscous internal stress model erosion micromechanics
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- 2.Mehta, P.K., Concrete in the Marine Environment. Elsevier Applied Science, London and New York, 1991.Google Scholar
- 10.Stephens, J.B. and Carrasquilo, R.L., Evaluating performance based test and specifications for sulfate resistance in concrete. Research report 1706-3, The University of Texas at Austin, December 2000.Google Scholar
- 23.Chang, L.H. and Chen, J.K., Experimental study on constitutive relation of cement mortar. Journal of Hydraulic Engineering, 2007, 38: 217–220 (in Chinese).Google Scholar