USE OF CATALYST FOR HYDRATION OF CEMENT, METHOD Russian patent published in 2000 - IPC

FIELD: building industry and building materials, more particularly compositions of cement containing concrete mixes with organic additives. SUBSTANCE: use of sodium salts of naphthalene polysulfonic acids makes it possible to reduce at least by two times duration of isothermal maintenance period during manufacture of concrete products. The same strength of concrete in the presence of said catalyst is achieved in much milder conditions and at considerably smaller amount of energy vehicle. Catalyst is added to cement-containing mixture with mixing water or in dry form directly to cement during grinding of clinker or additional grinding of cement. EFFECT: intensified effect of accelerating hardening of concrete in early periods. 4 cl, 4 tbl