硅酸盐学报2008，Vol.36Issue(10)：1411-1416,6.
低温硫酸盐侵蚀环境中水泥石腐蚀产物
EROSION SUBSTANCE OF CEMENT-BASED MATERIAL IN SULFATE ATTACK ENVIRONMENT AT LOW TEMPERATURE
摘要
Abstract
Cement-based material made at a water-binder ratio of 0.45, with 35% cement replacement ratio by limestone powder were cured under standard conditions for 28d and then immersed in three kinds of sulfate solutions (Na2SO4, MgSO4, Al2(SO4)318H2O) with 3.38% mass fraction of SO2-4 for 15 weeks at (5±2)℃. Exterior attack and ratio of compressive strength loss were studied, and ero-sion substances of cement-based material were investigated by means of Fourier transform infrared spectroscopy, X-ray diffraction,scanning electron microscopy, and energy dispersive spectrum as well as Raman spectra. The results show that the ratio of compres-sive strength loss in MgSO4 solution is the greatest, and that in Al2(SO4)318H2O solution is the lowest among these three kinds of sulfate solutions. In Na2SO4 and Al2(SO4)3?18H2O sulfate solutions, the main erosion substances are ettringite and gypsum. And in MgSO4 sulfate solution the main erosion substances are ettringite, gypsum, thaumasite and brucite.关键词
硫酸盐侵蚀/水泥基材料/侵蚀物相/碳硫硅酸钙Key words
sulfate attack/cement-based material/erosion substance/thaumasite分类
建筑与水利引用本文复制引用
张风臣,马保国,尹耿,吴媛媛,朱艳超..低温硫酸盐侵蚀环境中水泥石腐蚀产物[J].硅酸盐学报,2008,36(10):1411-1416,6.基金项目
国家自然科学基金(50378075) （50378075）
国家"十一五"科技支撑计划(2006BAF02A24)资助项目. （2006BAF02A24）
