脱硫石膏-粉煤灰-矿粉复合胶结材改性研究  

Modification of composite cementitious material produced by FGD gypsum-fly ash-GGBS

作　　者：位建强[1] 刘巧玲[2] 曹明莉[1] 

机构地区：[1]大连理工大学土木工程学院,辽宁大连116024 [2]山东建筑大学土木工程学院,山东济南250101

出　　处：《新型建筑材料》2010年第4期9-12,共4页New Building Materials

基　　金："十一五"国家科技支撑计划项目(2006BAJ04A04)

摘　　要：脱硫石膏作为烟气脱硫工艺的副产品,不仅价格低,来源广,而且具有与天然石膏相近的性质和优点。研究了不同矿物掺合料(粉煤灰和矿粉)、不同外加剂掺量以及不同配比对脱硫石膏基材料性能的影响。结果表明,将硅酸钠作为早强剂,体系的早期抗折、抗压强度与空白样相比分别提高150%和30.6%;生石灰和水泥双激发可使体系的强度提高100%以上;粉煤灰与矿粉复掺时,强度和经济效益都得到保证。综合考虑,FGD体系的配比为:m(脱硫石膏)∶m(粉煤灰)∶m(矿粉)=40∶20∶40。As the by-product of flue gas desulfufization process,FGD gypsum is not only cheap and has wide sources,but also has similar nature and advantages with natural gypsum. In this paper, the effects of different mineral admixture （fly ash, GGBS）, different quantity of admixture and different mixture ratio on the performance of the FGD gypsum-based composite cementitious material were studied. The experiment results show that compared with empty sample,when choosing potassium sulfate as early- strength agent,the initial breaking strength and compressive strength of the composite can be improved by 150% and 30.6% re- spectively. The strength can be improved by more than 100% with the alkali activation of quicklime and cement,while the use of fly ash and GGBS can ensure the strength and economic benefit. Through comprehensive consideration,the optimum mix of composite cementitious material is that：rn（FGD gypsum） ：m （fly ash） ：m （GGBS） =40：20：40.

关 键 词：脱硫石膏 粉煤灰 矿粉 外加剂 

分 类 号：TQ177.375[化学工程—硅酸盐工业]