粉煤灰与外加剂的适应性试验研究  

Experimental study on compatibility between concrete admixtures and fly ash

作　　者：王述银[1,2] 郭文康[1,2] 覃理利[1,2] 

机构地区：[1]长江水利委员会长江科学院,湖北武汉430010 [2]水利部水工程安全与病害防治技术研究中心,湖北武汉430010

出　　处：《混凝土》2012年第6期68-73,共6页Concrete

基　　金：水利部公益性行业科研专项经费项目(200901066)

摘　　要：试验选择了4个外加剂厂家2种类型共8种缓凝高效减水剂和4种引气剂进行性能检验,并验证其与多家电厂I级粉煤灰的适应性,以优选出适用于工程需要且性能优良的缓凝高效减水剂和引气剂,解决某水利工程现有外加剂缓凝时间短、引气效果差,不能满足大坝碾压混凝土施工技术要求的问题。从外加剂组合对掺不同品种粉煤灰的碾压混凝土的拌和性能、力学性能以及抗冻性能的影响出发,探讨了外加剂与粉煤灰的适应性问题。The test selected eight kinds of retarding super-plasticizer and four kinds of air-entraining agent,which come from four different additives manufacturers,and tested their performance.In order to optimize the types of retarding super-plasticizer and air entraining agent,which need for engineering and has excellent performance,verified the compatibility with a number of power plant＇s grad I fly ash.So that,the types of retarding super-plasticizer and air entraining agent could solve the problems of a hydraulic existing admixtures can＇t meet technical requirements of roller compacted concrete （RCC）dam construction, such as, the admixture＇s retardation time is too short and the effect of air-entraining is poor. In addition, started from the influence of admixtures combination on mixing,mechanical and anti-freeze-thaw performance of RCC with different types of grad I fly ash,discussed the compatibility between concrete admixtures and fly ash.

关 键 词：粉煤灰 外加剂 适应性 碾压混凝土 

分 类 号：TU528.04[建筑科学—建筑技术科学]