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• W3202676875 endingPage "102858" @default.
• W3202676875 startingPage "102858" @default.
• W3202676875 abstract "The interfacial transition zone (ITZ) around aggregates is known as the weakest zone in mortar and concrete, which highly influences the mechanical properties. In this study, the influence of ITZ on mechanical properties such as Young’s modulus and Poisson’s ratio of cementitious materials is evaluated using a multi-scale model (developed in five hierarchical levels: nano-scale cement hydrates∼ scale of concrete). In the proposed model, the microstructure of mortar/ concrete is considered as a three-phase material: fine/ coarse aggregates, ITZ of aggregates and bulk paste/ mortar. The primary input is the microstructure of cement paste and ITZ, which are predicted as the function of curing time using coupled cement hydration-thermodynamic model. The ITZ volume fraction is analytically computed based on aggregate particle size distribution. Multi-level homogenization methods (based on three-phase sphere model for two-phase composite material) are finally implemented to predict the effective properties of mortar and concrete. Here, the equivalent matrix consisted of fine/ coarse aggregate, bulk paste/ mortar and ITZ are obtained with the first and second levels homogenization procedures for mortar/ concrete. To validate the predictability of the models for mortar and concrete, predicted values are compared with independent experimental data sets. The results show a reasonable agreement with experimental results of Poisson’s ratio and Youngs modulus (in the error range of 5 GPa). The influences of ITZ on properties of mortar and concrete are also discussed based on the outcomes." @default.
• W3202676875 created "2021-10-11" @default.
• W3202676875 creator A5039160973 @default.
• W3202676875 creator A5076023437 @default.
• W3202676875 creator A5080633757 @default.
• W3202676875 date "2021-12-01" @default.
• W3202676875 modified "2023-10-14" @default.
• W3202676875 title "Proposing a three-phase model for predicting the mechanical properties of mortar and concrete" @default.
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• W3202676875 doi "https://doi.org/10.1016/j.mtcomm.2021.102858" @default.
• W3202676875 hasPublicationYear "2021" @default.
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