增强剂对粉煤灰-矿渣-水泥系统强度影响的研究  

Effect of reinforcing agent to the strength of fly ash-slag-portland cement system

作　　者：廖玉云[1] 吴笑梅[1,2] 樊粤明[1,2] 黄强伟 

机构地区：[1]华南理工大学材料学院,广东广州510640 [2]华南理工大学特种功能材料及制备技术教育部重点实验室,广东广州510640 [3]广东省塔牌集团股份有限公司技术中心,广东梅州514000

出　　处：《混凝土》2009年第9期95-98,101,共5页Concrete

摘　　要：研究了增强剂A、C及两者复合组成的A＋C对粉煤灰-矿渣-水泥系统强度的影响。结果表明：在粉煤灰和矿渣总掺量为50％、30％、10％的水泥系统中，A、C及A＋C对3、28、60d胶砂强度均有明显提高，其中A对胶砂强度的提高幅度随着粉煤灰和矿渣总量的增大而增大，C对胶砂强度的增幅随着两者总量的减少而增大。同时A、C及A＋C对C25混凝土3、7d和28d抗压强度均有7％～19％的提高作用。化学结合水分析结果表明：A、C、A＋C使粉煤灰-矿渣-水泥系统各龄期水化速率增加，生成更多的水化产物。DTA—TG结果表明：增强剂促进了粉煤灰和矿渣对系统中Ca（OH）2的吸收。Effect of different reinforcing agent A, C and A＋C to the strength of fly ash-slag-portland cement system were investigated.The results showed that when total amount of fly ash and slag was 50%, 30% and 10%,A, C and A＋C can significantly improve the system strength at 3,28,60 d ages,while range of A increased with the total amount of fly ash and slag increased, range of C increased with the total amount of fly ash and slag decreased;while A, C and A＋C can improve the C25 concrete compressive strength by 7%-19% at 3,7 d and 28 d.Through a bound water determination, we found A, C and A＋C accelerated the fly ash-slag-portland cement system hydration rate at different ages, generated more hydration products; DTA-TG analysis showed that reinforcing agent accelerated the absorption rate of slag and/lay ash to Ca （OH）2.

关 键 词：增强剂 矿渣 粉煤灰 水泥 强度 

分 类 号：TU528.043[建筑科学—建筑技术科学]