回转窑旁路放风灰作早强剂及其机理研究  

By—pass Kiln Dust as Early,Strength Agent and Its Mechanism Study

作　　者：刘来宝[1,2] 唐凯靖[1,2] 张礼华[1] 

机构地区：[1]四川省非金属复合与功能材料重点实验室一省部共建国家重点实验室培育基地,西南科技大学,绵阳621010 [2]绵阳昌绪新材料科技有限公司,621010

出　　处：《混凝土与水泥制品》2013年第6期5-9,共5页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51004066);四川省教育厅科研重点项目(11ZD1002)

摘　　要：测试分析了窑灰的物理和化学性能,讨论了其用作混凝土早强剂的性能。结果表明,适量窑灰的掺入具有显著的早强作用,明显增大了水泥诱导期和加速期的水化放热速率,但水化产物未出现明显变化。离子浓度增大导致水泥颗粒溶解和水化产物析出加速是窑灰早强作用的主要原因。The physical and chemical properties of the kiln dust and its performance used as early strength agent are analyzed. The results show that the appropriate amount of kiln dust has significant early strength and can increase the rate of hydration heat of cement in induction phase and accelerated phase, but the hydration products do not appear significant changes. The main reason of accelerating the early strength for the kiln dust is that the increase of ion concentration lead- ing to the cement particles dissolution and hydration oroducts of cement accelerated Drecioitation.

关 键 词：电石渣 窑灰 早强剂 水化热 

分 类 号：TQ172.7[化学工程—水泥工业]