Experimental research on preparation of gypsum with sulfuric acid solution
WU Di
GAO Jianming
TANG Yongbo
Abstract：Dihydration gypsum is prepared with sulfuric acid solution and calcium carbonate,the influence law of crystal habit modifier and sulfuric acid with different concentration on the morphology,particle size,and free water content was investigated. The results show that:when citric acid concentration is 0.01 to 0.12 mol/L and sulfuric acid solution concentration is 50 to 200 g/L,the obtained dihydration gypsum morphology is of diamond plate,the mean diameter distribute is 24 to 36 μm,and the free water content changes from 18.9% to 28.0%. And the 2 h compressive strength and 2 h flexural strength of the building gypsum produced with this dehydration gypsum can reach 5.0 can and 2.5 MPa respectively.
Keywords：dihydration gypsumbuilding gypsummorphologyparticle sizefree water contentstrength
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 52-55 )