| abstract |
【Task】 Cement that does not adversely affect the fresh properties of slumps, etc., and maintains the crack healing ability of concrete for a long period of time by maintaining the self-healing performance of cracks until the crack occurs in concrete, improving the long-term durability of concrete. Provided are an admixture and a production method thereof, and a cement composition, mortar and concrete containing the admixture. [Solution] Cement admixture is a granulated product that contains cement and water as a binder material for granulation treatment and is kneaded into a cracked self-healing material and contains as a main component of the cracked self-healing material. Silicate mineral (aluminosilicate, magnesium silicate), crystalline and amorphous silicate mineral (aluminosilicate), calcium phosphate, carbonate-containing compounds and minerals, lithium-containing compounds and minerals, magnesium Compound and mineral, fluorine-containing compound, pozzolanic material, latent hydraulic material, expansion material or non-fired expansion material component-containing material, calcium oxide-containing material, at least one from the group of cement The above is selected and mixed at an arbitrary mixing ratio. [Selection figure] None |