Micromechanical Damage Constitutive Model of Leached Concrete

Abstract:

This paper deal with concrete behavior under chemical and mechanical degradation. Experimental investigations were described where the effects of the calcium leaching process of concrete on its mechanical properties were highlight. The compressive strength and the stress-strain relationship of leached concrete with different leaching degradations were investigated experimental. As leaching grew, a loss of stiffness and of strength were observed and an obviously decrease of peak strain was noted. Then the micromechanical damage constitutive model of the leached concrete was proposed. The proposed model was applied to simulate typical laboratory tests. And it was shown that the proposed model was able to describe the main features of mechanical behavior of concrete in sound and leaching degraded states. And the parameters in the proposed model can be got by testing the pH value of pore solution, which it is easier to measure from the existing concrete.

• Periodical: Key Engineering Materials (Volumes 629-630)
• Pages: 572-578
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.629-630.572
• Online since: October 2014
• Authors: Chun Xiang Qian, Bei Huang, Zhi Hai He*
• Keywords: Concrete, Constitutive Model, Leaching, Mechanical, Stress-Strain Relation

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