高强度脱硫石膏复合材料制备与力学性能  

Study on the Mechanical Properties and Preparation of High-strength Desulfurized Gypsum Composites

作　　者：曲烈[1] 赵素宁[1] 李剑[1] 刘洪丽[1] 李素[1] 

机构地区：[1]天津城市建设学院材料科学与工程系,天津300384

出　　处：《粉煤灰综合利用》2012年第3期3-5,8,共4页Fly Ash Comprehensive Utilization

基　　金：国家自然科学基金(50772071;50972099);天津市高等教育科技发展基金计划项目(20110910)资助

摘　　要：研究了材料参数和工艺参数对β型半水脱硫石膏-水泥复合材料力学性能及结构特征的影响。结果表明,β型半水脱硫石膏-水泥复合材料的28d抗折、抗压强度分别是9.38MPa和48.84MPa;掺磨细矿物β型半水脱硫石膏-水泥复合材料的28d抗折、抗压强度分别为10.88MPa和67.67MPa;其软化系数分别为0.93和0.81。结构分析表明,掺磨细矿物β型半水脱硫石膏-水泥复合材料水化产物中,除二水硫酸钙外,还出现C-S-H凝胶和AFt晶体,这些胶体与晶体互相交织,降低孔隙率,提高了密实性和强度。The effects of material and process paramelers on the mechanical properties and siructural characteristics of 13 semi-hydrate desul- furized gypsum-cement composite was studied. The testing results showed that, of β semi-hydrate desulfurized gypsum-cement composite, 28-day flexural and compressive strength were 9.38MPa and 48.84Mpa respectively ; meanwhile, mixed with finer grinded minerals, 28d flexural and com- pressive strength of β semi-hydrate desulfurized gypsum-cement composites were 10.88MPa and 67.67MPa; their softening coefficients are respectively 0.93 and 0.81. Structural analysis indicated that, mixed with finer grinded minerals, the hydration products nf β semi-hydrate desulfurized gypsum-cement composites, except di-hydrate ccium sulfate, appeared CSH gel and AFt crystal, and these colloids and crystals interlaced with one another to reduce porosity, enhanced density and improve strength.

关 键 词：脱硫石膏 水泥 磨细矿物 力学性能 结构特征 

分 类 号：TQ177.375[化学工程—硅酸盐工业]