DEVELOPMENT AND APPLICATION OF NON DRYING-SHRINKAGE TYPE CONCRETE USING HYBRID ADMIXTURE AND EXPANSIVE ADDITIVE

A new type admixture was developed for a non drying-shrinkage type concrete. The properties of hardened concrete using this admixture and expansive additive were studied by laboratory test and mock-up test. Drying-shrinkage of the non drying-shrinkage type concrete using this admixture was more than 40% less than ordinary concrete. Properties of this hardened concrete, such as compressive strength were determined by this experimental tests. Effect of restraining cracks by using this admixture and expansive additive was verified by test on drying shrinkage cracking of restrained concrete, and mock-up wall test with opening. Furthermore, this concrete was applied to five buildings.