高掺量免煅烧脱硫石膏-矿渣复合胶凝材料的制备  

Preparation of composite cementitious materials with uncalcined desulfurization gypsum and slag

作　　者：焦宝龙[1,2] 焦宝祥[2] 黄芳[1] 吉飞[3] 李玉寿[2] 郭伟[2] 

机构地区：[1]贵州大学材料科学与冶金工程学院,贵州贵阳550025 [2]盐城工学院材料工程学院,江苏盐城224051 [3]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《新型建筑材料》2013年第11期1-4,共4页New Building Materials

基　　金：江苏省基础研究重点项目(BK2010036);江苏省新型环保重点实验室面上项目(AE201011)

摘　　要：通过在原状脱硫石膏中添加少量矿渣和激发剂制备免煅烧石膏基胶凝材料,研究了4种激发剂掺量对脱硫石膏-矿渣复合胶凝体系凝结时间和强度的影响。研究结果表明:硅酸盐水泥、氢氧化钠、复合激发剂CSN对胶凝体系有促凝的效果,而硫酸钠对胶结料起缓凝作用。4种激发剂对试样的强度均有增强效果,按作用大小的顺序为:CSN>硅酸盐水泥>氢氧化钠>硫酸钠。当70%原状脱硫石膏和30%矿渣中,添加4%的CSN复合激发剂时,试样的28 d抗折和抗压强度分别达到6.2 MPa和46.5 MPa。The uncalcined gypsum-based binder was prepared by the original desulfurization gypsum as raw materials,as well as a little slag and some activators.The influence of four different activators on the setting time and strength of the desulfurization gypsum-slag system was discussed.The results show that the addition of the Portland cement,sodium hydroxide and complex stimulator CSN have accelerating setting effects,while sodium sulfate has retardation on binder.All of the four activators can increase the strength of the samples.The order of the effect is that CSN〉cement〉sodium hydroxide〉sodium sulfate.When the amount of original desulfurization gypsum,slag and activator CSN were 70%,30%and 4% severally,the value of flexural strength and compressive strength of the cementitious materials cured 28 days is 6.2MPa and 46.5MPa respectively.

关 键 词：免煅烧脱硫石膏 矿渣 胶凝材料 

分 类 号：TU528[建筑科学—建筑技术科学]