Journal
CEMENT & CONCRETE COMPOSITES
Volume 32, Issue 3, Pages 241-252Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2009.12.005
Keywords
Sulfate attack; Cracking; Degradation; Durability; Numerical modeling
Ask authors/readers for more resources
A numerical methodology is proposed in this paper to Simulate the degradation of cementitious Materials under external Sulfate attack. The methodology includes diffusion of ions in and out of the structure, chemical reactions which lead to dissolution and precipitation of solids, and mechanical damage accumulation using a continuum damage mechanics approach. Diffusion of ions is assumed to occur under a concentration gradient as well as under a chemical activity gradient. Chemical reactions are assumed to Occur under a local equilibrium condition which is considered to be valid for diffusion controlled reaction mechanisms. A macro-scale representation of mechanical damage is used in this model which reflects the cracking state of the Structure. The mechanical and diffusion properties are modified at each time step based oil the accumulated damage. The model is calibrated and validated using experimental results obtained from the literature. The usefulness of the model in evaluating the mineralogical evolution and mechanical deterioration of the structure is demonstrated. (C) 2009 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available