脱硫建筑石膏改性及养护制度的研究  

Research on Modification and Maintenance System of Calcined Gypsum From Flue Gas Desulfurization

作　　者：周飞[1] 杨久俊[1,2] 王芳[3] 

机构地区：[1]郑州大学材料科学与工程学院,450052 [2]天津城市建设学院,300382 [3]内蒙古科技大学材料与冶金学院,014010

出　　处：《混凝土与水泥制品》2012年第7期49-53,共5页China Concrete and Cement Products

基　　金：国家自然科学基金项目(50972099);国家科技支撑计划项目(2012BAJ20B01)

摘　　要：利用燃煤电厂烟气脱硫所产的脱硫石膏制备的β型脱硫建筑石膏,在组分复合改性提高强度和耐水性的基础上,探讨了不同养护制度对脱硫建筑石膏复合改性砌块抗压强度的影响。结果表明:当β型脱硫建筑石膏、生石灰、水泥、粉煤灰在58%:14%:12%:16%的配合比下,可以使复合改性脱硫石膏基胶凝材料的抗压强度和软化系数明显提高,分别达到18.7MPa和0.7;在湿热养护条件下,养护温度为75℃、养护湿度为95、养护时间为12h的条件下,脱硫石膏复合改性砌块性能表现良好,14d抗压强度达到19.8MPa,可以基本满足建筑墙体材料的要求。Using the β-desulfurization building gypsum prepared from calcined gypsum from flue gas desulfurization （FGD）, based on the components compound modification to improve the strength and water resistance of blocks, the influences of the different maintenance systems on the compressive strength of the desulfurization building gypsum compound modification blocks are investigated. The results show that the compressive strength and softening coefficient of the cementitious material with compound modification calcined gypsum from FGD have greatly improved by mixing with fly ash, lime, and cement. When the mix ratio ofβ-desulfurization building gypsum, lime, cement, fly ash is 58%： 14%： 12%： 16%, the compressive strength and softening coefficient can reach to 18.7MPa and 0.7 respectively. In the hot and humid maintenance condition, with the maintenance temperature 75℃, humidity 95 and maintenance time 12 h, the performance of the desulfurization gypsum compound modification blocks is good, and the 14d compressive strength gets to 19.8MPa, which can basically meet the requirement of building wall materials.

关 键 词：脱硫建筑石膏 复合改性 养护制度 湿热养护 

分 类 号：TU522[建筑科学—建筑技术科学]