混凝土复合掺合料火山灰活性快速评定方法研究  

Research on Rapid Assessment Method of Pozzolanic Activity of Concrete with Compound Admixture

作　　者：佟银子[1,2] 王元纲 黄凯健[1] 张高勤[1] 胡亚风[1] 

机构地区：[1]南京林业大学土木工程学院,210037 [2]江苏省海门市交通运输局,226100

出　　处：《混凝土与水泥制品》2017年第12期79-84,共6页China Concrete and Cement Products

基　　金：住房和城乡建设部科学技术项目计划研究开发项目(2014-K4-033);江苏高校优势学科建设工程项目(PAPD)

摘　　要：采用三种二元复合掺合料,研究了硅铝含量测定法和电导率法快速评定复合掺合料火山灰活性的可行性。结果表明,活性硅铝百分含量、电导率变化率均与28d活性指数之间存在相关性,能反映复合掺合料的火山灰活性。通过建立活性硅铝百分含量(或电导率变化率)与28d活性指数的拟合方程,可以对复合掺合料的火山灰活性实现快速评定。Three kinds of binary compound admixtures were used to study on the feasibility of methods which used to rapidly assessing the pozzolanic activity of compound admixtures by the determination of silicon and aluminum content or the electrical conductivity. The results show that the percentage of active SiO2 and Al2O3, or the rate of electrical conductivity change are correlated with the 28d activity index, which can reflect pozzolanic activity of compound admixtures. By establishing the fitting equation between the percentage of active SiO2 and Al2O3 （or the rate of electrical conductivity change） and the 28d active index, the rapid assessment of the pozzolanic activity of compound admixtures can be achieved.

关 键 词：复合掺合料 火山灰活性 快速评定方法 活性硅铝百分含量 电导率 

分 类 号：TU528[建筑科学—建筑技术科学]