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High-strength gypsum retarder and preparation method thereof
The invention relates to a high-strength gypsum retarder and a preparation method thereof. The gypsum retarder is obtained by mixing barium carbonate and/or dibarium silicate, wherein dibarium silicate is obtained by mixing and calcining barium carbonate and silicon dioxide. According to the mechanism that the Ba<2+> and calcium sulfate in the gypsum are reacted to generate water insoluble barium sulfate, and barium sulfate is wrapped on the surface of the gypsum granule and the solution rate of the gypsum is reduced, so that the retarder has the functions of inhibiting the gypsum hydration and prolonging the gypsum setting time. The retarding effect of dibarium silicate is better than that of barium carbonate under the same adulterate amount and the strength descent of the gypsum caused by a common retarder is simultaneously reduced.
High-strength gypsum retarder and preparation method thereof
The invention relates to a high-strength gypsum retarder and a preparation method thereof. The gypsum retarder is obtained by mixing barium carbonate and/or dibarium silicate, wherein dibarium silicate is obtained by mixing and calcining barium carbonate and silicon dioxide. According to the mechanism that the Ba<2+> and calcium sulfate in the gypsum are reacted to generate water insoluble barium sulfate, and barium sulfate is wrapped on the surface of the gypsum granule and the solution rate of the gypsum is reduced, so that the retarder has the functions of inhibiting the gypsum hydration and prolonging the gypsum setting time. The retarding effect of dibarium silicate is better than that of barium carbonate under the same adulterate amount and the strength descent of the gypsum caused by a common retarder is simultaneously reduced.
High-strength gypsum retarder and preparation method thereof
GAO JIANMING (author) / WANG CHUYAN (author) / TANG YONGBO (author)
2015-06-24
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
Retarder for lightweight gypsum and preparation method thereof
| European Patent Office | 2022