| abstract |
An object of the present invention is to improve the water stoppage by repairing even a large crack such as a through crack without using an organic material even in a concrete in a region other than a low water powder ratio. Concrete is blended so as to include water, powder containing cement, an expansion material, and an inorganic cement crystal growth material, fine aggregate, coarse aggregate, and the like. At this time, the weight ratio of water to the powder containing the cement, the expansion material, and the inorganic cement crystal growth material (water powder ratio) is 60% or less. Moreover, it mix | blends so that the weight of an expandable material may be 10-80 kg / m < 3 >. Moreover, it mix | blends so that the weight of an inorganic cement crystal growth material may be set to 0.1-10 kg / m < 3 >. [Selection figure] None |