不同来源粉煤灰品质对混凝土性能的影响  

Influence of quality of fly ash from different sources on concrete performance

作　　者：范英富 朱雨磊 李骏航 龚俊 王利强 FAN Yingfu;ZHU Yulei;LI Junhang;GONG Jun;WANG Liqiang(Hangzhou Qianxin-Huawei Building Materials Co.,Ltd.,Hangzhou 310000;Zhejiang Huawei Ready-mixed concrete Co.,Ltd.,Hangzhou 311228;Zhejiang Huawei-Dongyi Building Materials Co.,Ltd.,Hangzhou 311215)

机构地区：[1]杭州钱新华威建材有限公司,浙江杭州310000 [2]浙江华威混凝土有限公司,浙江杭州311228 [3]浙江华威东翼建材有限公司,浙江杭州311215

出　　处：《中国建材科技》2021年第6期43-46,共4页China Building Materials Science & Technology

基　　金：2020年度浙江省建设科研项目(2020K188/2020K189/2020K041);2020年度杭州市城建科研项目(2020074/2020075)。

摘　　要：针对生产过程中掺粉煤灰混凝土浮灰问题,选取不同来源的9种粉煤灰,对比研究其基本性质、理化特性(包括XRF、XRD和SEM)及对混凝土基本性能的影响。结果发现,粉煤灰中玻璃体的含量及其粒度分布是判断品质优劣的重要依据。粉煤灰中是否含有较多大颗粒且粒度分配合理直接影响混凝土的工作性。粉煤灰的28d活性指数(66%~79%)对混凝土强度无直接影响。结合试验数据,评判了9种粉煤灰的优劣,并给出是否可用的建议。Aiming at the problem of floating ash in the production process of concrete mixed with fly ash,nine kinds of fly ash from different sources are selected,and their basic properties,physical and chemical properties(including XRF,XRD and SEM)and their effects on the basic properties of concrete are compared and studied.The results show that the content of vitreous in fly ash and its particle size distribution are the important basis to judge the quality.The workability of concrete is directly affected by whether there are many large particles in fly ash and the particle size distribution is reasonable.The 28d activity index of fly ash(66%~79%)has no direct effect on the strength of concrete.Combined with the test data,the advantages and disadvantages of nine kinds of fly ash are evaluated,and the suggestions on whether they can be used are given.

关 键 词：粉煤灰 化学组成 物相成分 颗粒形貌 玻璃体 

分 类 号：TU528[建筑科学—建筑技术科学]