Process for the preparation of initialcompression improving agent for hydraulic cement

摘要

The present invention relates to a method for manufacturing an initial strength improver for hydraulic cement using fly ash collected from a circulating fluidized bed boiler, wherein the initial strength improver for hydraulic cement is fly ash collected from a circulating fluidized bed boiler of a power plant and flue gas desulfurization gypsum or phosphoric acid. It is produced by calcining and grinding neutralized gypsum in an electric furnace. The initial strength improver for hydraulic cement according to the present invention solves the side effects of adversely affecting the durability of hydraulic cement by components such as free CaO and reactive CaO in hydraulic cement containing fly ash of a circulating fluidized bed boiler, which is an initial strength of 3 years old. It shows the effect of stably expressing the compressive strength of days and 7 days of age.