脱硫建筑石膏胶凝材料的改性研究  

Investigation on the modification of desulfurization calcined gypsum cementitious materials

作　　者：韩菊[1] 刘志刚[1] 杨立荣[1] 姚少威[1] 白瑞英[1] 封孝信[1] 

机构地区：[1]河北联合大学材料科学与工程学院,河北省无机非金属材料重点实验室,河北唐山063009

出　　处：《新型建筑材料》2014年第3期6-8,34,共4页New Building Materials

基　　金：河北省建设厅科技计划项目(20122106)

摘　　要：利用硫铝酸盐水泥熟料(SAC)单掺和SAC与磨细高炉矿渣粉(BFS)复掺对脱硫建筑石膏(DCG)进行改性,提高其强度和耐水性。实验结果表明,SAC单掺和SAC与BFS复掺均可以显著改善DCG材料的强度和耐水性。DCG中内掺15%SAC,可以使7 d抗折、抗压强度和软化系数分别提高了64%、86%和50%;在内掺15%SAC的DCG-SAC复合胶凝材料中,加入15%的BFS取代DCG,可以使DCG-SAC复合胶凝材料7 d抗折、抗压强度和软化系数分别增大28%、50%和15%。Desulfurization calcined gypsum（DCG） was modified to improve its strength and water resistance by doping sulfur aluminate cement clinker（SAC） or co-doping SAC and ground blast furnace slag （BFS）.Experimental results show that the strength and water resistance of DCG can be significantly improved by doping SAC or co-doping SAC and BFS in DCG.When the doping concentration of SAC was 15％,flexural strength,compressive strength and softening coefficient of the samples cured for 7 days increased by 64％,86％ and 50％ respectively.Flexural strength,compressive strength and softening coefficient of DCG-SAC composite cementitious material hydrated for 7 days increased by 28％,50％ and 15％ respectively,while 15％ BFS was induced to replace DCG into the DCG-SAC cementitious material,which contained 15％ SAC.

关 键 词：脱硫建筑石膏 硫铝酸盐水泥熟料 磨细高炉矿渣粉 强度 软化系数 

分 类 号：TU526[建筑科学—建筑技术科学] TQ177.377[化学工程—硅酸盐工业]