化学外加剂对水泥砂浆抗TSA性能的影响.pdf

30 4 武 汉 理 工 大 学 学 报 Vol. 30 No. 4 2008 4 JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY Apr. 2008 TSA 1 1 1 2 1 罗忠涛 , 马保国 , 李相国 , 高小建 , 王 凯 ( 1. , 430070; 2. , 150006) : 研究了掺加不同功能化学外加剂( 减缩剂早强剂及结晶抑制剂) 及30% 石灰石粉的普硅水泥砂 试件在 (5? 1) e 下,质量分数 5%的MgSO 溶液中的外观变化强度发展及其化学成分分析结果表明: 经侵蚀 360 d 后, 掺 4 加不同功能化学外加剂的各砂 试件均出现了碳硫硅酸钙晶体, 说明实验所用化学外加剂不能从根本上解决TSA 问 题, 但在侵蚀早期(210 d) 除结晶抑制剂外均可有效延缓水泥砂 TSA 的发展 : 水泥砂 ; 硫酸盐侵蚀; 碳硫硅酸钙; 化学外加剂 : TU 528.01 : A : 1671-4431(2008)04-0023-03 Influence of Chemical Admix ures on An i-TSA Performance of Cemen Mor ars 1 1 1 2 1 L UO Zhong-tao , MA Bao-g uo , L I X iang-g uo , GA O X iao-j i an , WA N G K ai ( 1. ey Laboratory for Silicate Materials ScienceEngineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China; 2. School of Materials Science Engineering, Harbin Institute of Technology, Harbin 150006, China) Abs rac : In ( 5? 1) e , 5% in mass MgSO corrosion solution, the visual appearance, strength and composition analysis of 4 cement mortars added with different functional chemical admixtures (shrinkage-reducing agent, hardening accelerator, crystal resistance agent) and limestone powder wereresearched at different storage times. The results indicated that after corroded for 360 days, the thaumasite crystal appeared in all cement mortars added with different functional chemical admixtures. It showed