粉煤灰综合利用 2012NO.2 FLY ASH COMPREHENSIVE UTILIZATION 验与用 粉煤灰对不同胶凝体系干缩影响 Influence of Fly Ash on Shrinkage Performance of Different Cementitious System 姜保晓，徐衍昌，左俊卿2，陈逸群2 (1.中交一航局第一工程有限公司，天津300456； 2.同济大学先进土木工程材料教育部重点实验室，上海201804) 摘要：采用干燥收缩试验法研究了粉煤灰对再生微粉和水泥复合胶凝体系、碱矿渣胶凝体系收缩性能的影响. 试验结果表明：粉煤灰能明显降低再生微粉和水泥复合胶凝体系、碱矿渣胶凝体系干燥收缩性能；分析了粉煤灰降低不 同胶凝体系收缩的机理. 关键词：粉煤灰；胶凝体系；收缩 中图分类号：TU528.0 文献标识码：A 文章编号：1005-8249(2012)02-0018-04 Jiang Bao-xiao' Xu Yan-chang' Zuo Jun-qing? Chen Yi-qun (NO.1 Engineering Conpany Lid of CCCC First Harbor Engineering Company Lid Tianjin 300456 2.Key Laboratory of Advanced Civil Engineering Materials (Tongji University) Ministry of Education Shanghai 201804) Abstract:In this paper drying shrinkage test was used to study the influence of fly ash on shrinkage performance of cement-reproduction powder pound cementitious system and alkali-activated slag cementitious system.Results show that fly ash can significantly reduce the shrinkage performance of cement-reproduction powder pound cementitious system and alkali-activated slag cementitious system.The mechanism of reducing the shrinkage perfomance of different cementitious system by fly ash was analysed. Key words:Fly ash;Cementitious system;Shrinkage 粉煤灰中的SiO2和Al2O3是决定其活性的主要 1粉煤灰对水泥和再生微粉复合胶凝体系干缩影响 成分.粉煤灰的矿物组成主要是铝硅玻璃体，呈实心 或者空心微细球形颗粒（实心微珠或空心微珠）.这 1.1试验原材料及方法 种微珠具有颗粒细、表面光滑等特点，其含量多少是决 试验原材料包括：海螺P.0.42.5普通硅酸盐水 定粉煤灰需水量高低、活性强弱的关键因素.国内 泥.磨细粉煤灰(FA) 以及由南京友西科技有限责任 外学者关于粉煤灰对胶凝材料工作性、强度、耐久性等 公司开发研制的UC系列优质微粉I 微粉Ⅱ（其颗粒 方面做了大量研究工作.掺粉煤...
粉煤灰对不同胶凝体系干缩影响.pdf
