【摘要】：采用硫酸溶液和碳酸鈣制備了二水石膏,研究了不同濃度的轉(zhuǎn)晶劑和硫酸對(duì)生成的二水石膏形貌、顆粒大小和游離水含量的影響規(guī)律。結(jié)果表明,轉(zhuǎn)晶劑檸檬酸濃度為0.01~0.12 mol/L,硫酸濃度為50~200 g/L時(shí),制得的二水石膏形貌呈菱形薄板狀,中位徑為24~36μm,石膏游離水含量為18.9%~28.0%。采用此二水石膏制備的建筑石膏其2 h抗壓強(qiáng)度可達(dá)到5.0 MPa,2 h抗折強(qiáng)度達(dá)到2.5 MPa。
[Abstract]:Gypsum dihydrate was prepared from sulfuric acid solution and calcium carbonate. The effects of different concentrations of transgranular agent and sulfuric acid on the morphology, particle size and free water content of gypsum dihydrate were studied. The results show that when the concentration of citric acid is 0.01 ~ 0.12 mol / L, and the concentration of sulfuric acid is 50 ~ 200 g / L, the shape of gypsum dihydrate is rhomboid, the median diameter is 24 ~ 36 渭 m, and the free water content of gypsum is 18.9% ~ 28.0%. The 2 h compressive strength of the building gypsum prepared with this gypsum can reach 5.0 MPA / 2 h and the flexural strength can reach 2.5 MPA.
【作者單位】： 東南大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：江蘇省新型墻體材料專項(xiàng)基金項(xiàng)目([2016]93)
【分類號(hào)】：TQ177.372

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1 馬宗明;快速、連續(xù)性檢測(cè)石膏板游離水含量的探討[J];吉林建材;1998年02期

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