“混凝土硫酸盐结晶破坏”微观分析(Ⅱ)-混凝土  

Micro-Analysis of "Sulfate Salt Weathering Distress on Concrete":Ⅱ.Concrete

作　　者：刘赞群[1] 邓德华[1] Geert De Schutter 刘运华 

机构地区：[1]中南大学土木工程学院,中国长沙410075 [2]Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University, Ghent 9052, Belgium [3]郴州市建设工程质量安全管理监督站,中国湖南郴州423000

出　　处：《硅酸盐学报》2012年第5期631-637,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50378092);中南大学自由探索计划(2011-QNZT110)资助

摘　　要：运用环境扫描电镜、能谱仪和X射线衍射等微观分析手段研究了稳定环境中,半浸泡混凝土试件在硫酸钠和硫酸镁溶液中的劣化破坏特征,以及混凝土碳化对"混凝土硫酸盐结晶破坏"的影响。结果表明:粗骨料界面过渡区生成的大量钙矾石和石膏等晶体是引起混凝土试件劣化的原因;在碳化混凝土内发现了硫酸钠结晶破坏现象。The deterioration behavior of concrete specimens partially exposed to Na2SO4 and MgSO4 solutions was analyzed by using environmental scanning electron microscopy,energy dispersive spectrometer and X-ray diffraction as well.The effect of concrete carbonation on the ＂sulfate salt weathering on concrete＂ was investigated.The results show that the ettringite and gyp-sum crystals formed in the interfacial transition zone cause the concrete damage.Na2SO4 crystals could be identified in the carbonate concrete.

关 键 词：硫酸盐侵蚀 盐结晶 微观分析 混凝土 

分 类 号：O482.3[理学—固体物理]