憎水剂对脱硫石膏耐水性能的影响  

Effect of Hydrophobic Agent on Water Resistance of Desulfurized Gypsum

作　　者：朱效甲 陈永杰 朱芸馨 朱倩倩 朱效兵 朱效涛 Zhu Xiaojia;Chen Yongjie;Zhu Yunxin

机构地区：[1]济南杰美菱镁建材研究所,山东济南250031 [2]山东泰安源圣,钰建材有限公司,山东泰安271000

出　　处：《江苏建材》2021年第4期30-33,共4页Jiangsu Building Materials

摘　　要：通过添加不同形态的有机硅憎水剂来提高脱硫石膏的耐水性,研究有机硅乳液(A液)和有机硅粉末(G粉)对脱硫石膏浆体密度、力学强度、耐水性能的影响,并通过微观分析手段(SEM)分析了憎水剂对脱硫石膏晶体形貌的影响。结果表明,A液和G粉具有引气和稳泡功能,能够降低脱硫石膏的浆体密度。随掺量的增加,A液使脱硫石膏硬化体的强度逐渐降低,而G粉使脱硫石膏的抗折、抗压强度呈先提高后降低趋势。A液、G粉皆能大幅度提高脱硫石膏的耐水性、降低质量吸水率。有机硅憎水剂能够改变脱硫石膏硬化体的晶体形貌,尤其G粉能够提高晶体的结晶度,使硬化结晶体相互搭接、交织和穿插,并呈无定向排序,结构更加致密。The effects of promoting the water resistance of desulfurized gypsum by adding different forms of silicone hydrophobic agent were studied.Specifically,the influence of silicone emulsion A and silicone powder G on the density,mechanical strength and water resistance of desulfurized gypsum slurry were studied,and the crystal morphology of desulfurized gypsum was analyzed with SEM technology.The results show that emulsion A and powder G have the functions of air-entraining and foam-stabilizing,which can reduce the density of the desulfurized gypsum slurry.With the increase in the content,emulsion A reduces the strength of the gypsum hardened body,while powder G makes the flexural and compressive strength of the gypsum show a tendency to increase first and then decrease.Both emulsion A and powder G can greatly improve the water resistance of desulfurized gypsum,reduce the quality water absorption,change the crystal morphology of the hardened body.Especially,powder G can increase the crystallinity of the crystal,make the hardened crystals overlap,interweave and intersect,and benefit for non-directional order,dense structure.

关 键 词：烟气脱硫石膏 有机硅憎水剂 浆体密度 力学强度 耐水性能 微观形貌 

分 类 号：TQ177.32[化学工程—硅酸盐工业]