施工技术 2016年2月上 34 CONSTRUCTION TECHNOLOGY 第45卷第3期 D0I:10.7672/sgjs2016030034 稻壳灰与不同减水剂适应性研究* 吕燕霞，戴俊辉 (浙江工业职业技术学院，浙江绍兴312000) [摘要]研究稻壳灰在与不同减水剂的复合作用过程中流动性、流动性经时损失、强度等方面的变化规律，分析稻 壳灰与减水剂的适应性，探索利用外加剂调控水泥稻壳灰复合胶凝材料的可行性，完善稻壳灰与其他原材料的匹 配关系.结果表明：稻壳灰对高分散聚羧酸减水剂的应用性能影响最大，严重加剧流动性经时损失；保坍型外加剂 能够有效改善稻壳灰浆体流动性经时损失严重的问题，但是会严重减缓水泥水化进程；稻壳灰对萘系减水剂的作 用规律影响不大，与纯水泥体系相近. [关键词]混凝土；稻壳灰；减水剂：流动性；经时损失；水化进程 [中图分类号]TU528 [文献标识码]A[文章编号]1002-8498(2016)03-0034-05 Study on the Adaptability of Rice Husk Ash in Different Water Reducers Lu Yanxia Dai Junhui Zhejiang Industry Polytechnic College Shaoxing Zhejiang 312000 China) Abstract:The influence of rice husk ash RHA)on flowability flowability loss with time and strength were studied in the posite with different water reducers.The adaptability of rice husk ash and water reducers are analyzed to explore the matching relationships of rice husk ash with other raw materials.The results showed that the rice husk ash had the biggest impact on application performance of polycarboxylic acid admixture with high dispersing and aggravated by the flowability loss;polycarboxylic acid admixture with low slump can effectively improve the rice husk ash produced by loss during severe liquidity problems but can seriously slow cement hydration process.Effect of the rice husk ash on naphthalene based water reducers was relatively stable which is closed to the pure cement system. Key words:concrete;rice husk ash;water reducers;flowability;loss with time;hydration 0引言 稻壳灰与萘系减水剂、高分散性聚羧酸...
稻壳灰与不同减水剂适应性研究.pdf
