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ANALYTICAL STUDY ON INFLUENCE OF MORTAR-AGGREGATE INTERFACE CHARACTER ON CONCRETE STRENGTH BY RBSM

Concrete is a heterogeneity material consisting of mortar and aggregate in meso scale. Evaluation of fracture process in this scale is useful to clarify the material characteristics of concrete. However, analytical approach in this scale has not been carried out enough yet. And in meso scale, mortar-aggregate interface is the weakest part in concrete so that it is considered that its material property affect the strength of concrete. In this study, influence of interface characteristic on concrete strength is simulated by 3D Rigid Body Spring Analysis. The reduction of strength of model due to the deterioration of interface character can be simulated qualitatively.