外加剂对超高掺量粉煤灰混凝土性能影响研究
Effect of Additives on the Performance of Super High Volume Fly Ash Concrete
龚静 1李志鹏 2吴建林 2陈吉讯2
作者信息
- 1. 武汉轻工大学土木工程与建筑学院,武汉 430023;武汉大学土木建筑工程学院,武汉 430072
- 2. 武汉轻工大学土木工程与建筑学院,武汉 430023
- 折叠
摘要
分别以氢氧化钠、碳酸钠、硫酸钠、磷酸钠和氯化钙五种常见化学试剂作为超高掺量粉煤灰混凝土外加剂,测试了其7 d,14 d,28 d,56 d的抗压强度,并分析对比了各外加剂对超高掺量粉煤灰混凝土强度及水化反应的影响.实验结果表明:在0.5 mol/L浓度下,氯化钙和氢氧化钠组合溶液对粉煤灰混凝土早中后期强度均有明显的提升;而氢氧化钠、碳酸钠、硫酸钠和磷酸钠对其早中期强度有一定的提高,但对后期强度影响不大.
Abstract
Five common chemical reagents which is NaOH, Na2CO3, Na2SO4, Na3PO4 and CaCl2 respectively, were used as additives for the super high volume fly ash concrete.And then the compressive strength of 7 d, 14 d, 28 d and 54 d respectively was tested, and analyzed the difference on the fly ash concretes with different additives.The result shows that the CaCl2 combine with NaOH were the best additives which improved the compressive strength obvious in early, middle and last strength, NaOH, Na2CO3, Na2SO4 and Na3PO4 were effective on the early and middle strength but show little effect on last strength.
关键词
外加剂/超高掺量/粉煤灰/混凝土/抗压强度Key words
additives/high volume/fly ash/concrete/compressive strength引用本文复制引用
基金项目
湖北省交通运输厅项目(2013-731-1-7)
出版年
2017
NETL
NSTL
维普
万方数据