Preparing method for Cement composition and cement admixture using byproduct phosphogypsum: Fid-Bau Portal

Preparing method for Cement composition and cement admixture using byproduct phosphogypsum

PARK JONG RYUL

The present invention relates to a method of preparing an admixture for blast furnace slag cement and a cement composition, configured to use byproduct phosphogypsum, which is an industrial waste, as a stimulant for slag cement and hydraulic cement. The cement composition is prepared in a way that an admixture is prepared by adding 3-4 parts by weight of slaked lime to 100 parts by weight of dehydrated gypsum, semi-hydrated gypsum, or III-type anhydrous gypsum produced by using byproduct phosphogypsum, and the admixture is added to blast furnace slag. In the present invention, various types of gypsum such as dehydrated gypsum, semi-hydrated gypsum, and III-type anhydrous gypsum to replace II-type anhydrous gypsum prepared by using byproduct phosphogypsum can be used as an admixture. Accordingly, in addition to the preparation of II-type anhydrous gypsum, the present invention is effective in saving energy, and thus, utilization of byproduct phosphogypsum which is an industrial waste can be increased.

본 발명은 산업폐기물인 인산부산석고를 이용하여 슬래그시멘트 및 수경성시멘트의 자극제로 사용하기 위한 고로 슬래그 시멘트용 혼화재 및 시멘트 조성물의 제조방법에 관한 것이며, 인산부산석고로부터 제조한 이수석고, 반수석고 또는 Ⅲ형-무수석고 100중량부에 대하여 소석회 3 ~ 4중량부를 첨가하여 혼화재를 제조하며, 이를 고로 슬래그 시멘트에 첨가하여 시멘트 조성물를 제조하는 것으로 이루어진다. 본 발명은 인산부산석고로부터 제조되는 Ⅱ형-무수석고를 대체하여 이수석고, 반수석고, Ⅲ-무수석고 등 다양한 형태의 석고를 혼화재로 이용할 수 있으므로 함으로써 Ⅱ형-무수석고의 제조에 다른에너지 절감의 효과가 있어 산업폐기물인 인산부산석고의 활용도를 높이는 특징이 있다.

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