Development of control method about micro crack localization for restrained volume change which occurred by simultaneous movement of moisture and heat in RC structure

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In consideration of the moisture evaporation and thermal diffusion in dryness of concrete, this research examined the crack pattern which the volume change accompanying those environment does from simultaneous movement of water and heat. Moreover, the micro crack localization mechanism to fracture process zone under a restricted state was examined from the tensile creep test and the tensile stress relaxation test. Furthermore, the control method in consideration of accumulation of the micro crack was examined to shrinkage crack width important for the improvement in durability of RC structure. As a result, the analysis method has been built by relating of tensile creep strain and accumulation of micro crack, about crack pattern, micro crack localization mechanism, and shrinkage crack width.