Meso-scale model for simulations of concrete subjected to cryogenic temperatures
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© 2015, RILEM. This paper includes computational analysis of the behavior of concrete subjected to cryogenic temperatures. The analysis is performed by developing a computationally implemented meso-scale model of concrete as a 3-phase composite that consists of mortar matrix, aggregate, and interfacial transition zone. The modeling results provide insight on the effects of concrete mixture design and properties on resistance to damage during cooling to cryogenic temperatures. The results show that the most important factor that affects damage is the difference in the coefficient of thermal expansion between the mortar and aggregates. Models in which the mortar and aggregate had close values of positive coefficients are predicted to experience less damage. The modeled material with irregular shape particles is predicted to experience more localized damage than the modeled material with circular shape particles. In addition, the model predicts a reduction in damage when air entrainment is present. The damage results predicted by the model for air entrained and non-air entrained concrete are in general agreement with experimental data from the literature.
author list (cited authors)
Masad, N., Zollinger, D., Kim, S., & Grasley, Z.