Abstract
This paper deals with shrinkages of several kinds of concrete walls. Three types of coarse aggregate were used in this study; normal coarse aggregate, recycled concrete coarse aggregate as grade 1 and grade 3. Elastic modulus, drying shrinkage strains and creep strains of concrete specimens and shrinkage strains of the walls were measured. Based on the mechanical properties of concrete, the shrinkage strains of walls were simulated by a step-by-step method. Following conclusions were obtained. Shrinkage strains of concrete walls varied with the type of coarse aggregate. A relationship between tensile strain capacities and days at cracking in concrete walls was similar to previous data using cracking frame of JIS "Testing method on cracking of concrete due to restrained drying shrinkage". Good agreements were obtained between the measured strains and computed values in concrete walls.
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