CEMENT ADMIXTURE, PROCESS FOR PRODUCING SAME, AND CEMENT COMPOSITION, MORTAR, AND CONCRETE EACH CONTAINING THE ADMIXTURE

摘要

Disclosed is a cement admixture comprising granules which are obtained by adding a cement as a binder material for granulation and water to a material for self-recovery from cracking and kneading the mixture and which contain the material for self-recovery from cracking as a main component. The material for self-recovery from cracking comprises at least one substance selected from a group consisting of phyllosilicate minerals (aluminosilicates, magnesium silicates), crystalline and noncrystalline silicate minerals (aluminosilicates), calcium phosphate, compounds and minerals having a carbonic acid group, compounds and minerals containing lithium, compounds and minerals containing magnesium, compounds containing fluorine, materials having pozzolanic reactivity, materials having latent hydraulicity, materials containing an expanding material or unburned expanding material, materials containing calcium oxide, and cements, the selected substances having been mixed together in any proportion.