Abstract
The fractal dimensions of the surface crack of the three concrete beams with different gradations coarse aggregate crumb rubber in damaging state are calculated. The research indicates that the damage evolution process of the test beams is a process of the fractal dimension increasing. The research result reveals the relationship between damage variables and fractal dimension of the test beams. The small particle size of coarse aggregate gradation has the best mechanical characteristics with the increasing load. It provides a new method for studying the mechanical properties of crumb rubber concrete beams.
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