Cl-对掺石灰石粉水泥基材料TSA的影响
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国家重点基础研究发展计划(973计划)项目(2009CB623106)


Influences of Chloride Ions on Thaumasite Form of Sulfate Attack inCement Based Materials with Limestone Powder Added
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    摘要:

    将掺石灰石粉水泥基材料试件分别浸泡于(5±2)℃不同配比(质量比)的NaCl/Na2SO4复合溶液中,记录侵蚀过程中试件外观变化,测试试件强度,并对侵蚀后的腐蚀产物进行红外光谱分析和X射线衍射分析.结果表明:在纯Na2SO4溶液中浸泡的试件发生碳硫硅钙石型硫酸盐侵蚀(TSA)破坏,试件由表及里剥落,失去黏凝性.在NaCl/Na2SO4复合溶液中浸泡试件的TSA破坏程度随着Cl-浓度(质量浓度)的提高逐渐降低.Cl-降低碳硫硅钙石形成速度,进而减缓TSA破坏进程,Cl-浓度越高减缓效果越明显.Cl-对掺石灰石粉水泥基材料TSA的影响过程可分为3个阶段,即抑制阶段、衰退阶段及失效阶段.

    Abstract:

    A research of low temperature sulfate/chloride attack was carried out to investigate the effect of chloride ion on thaumasite form of sulfate attack(TSA). The samples of cement based materials with limestone powder added were immersed in NaCl/Na2SO4 mixed solution with different mix proportions(by mass) at (5±2)℃. The appearance of sample was observed, its strength was tested. Besides, the corrosion products were analyzed by infrared spectrometry(IR) and X ray diffraction(XRD). The results show that the TSA in the sample immersed in pure Na2SO4 solution takes place, spalling of the sample from external to internal occurs, and the gelling property of the sample is lost. However, TSA erosion degree of the sample immersed in NaCl/Na2SO4 mixed solution gradually reduces with increasing chloride ion mass concentration. Chloride ion can slow down TSA process by reducing thaumasite formation rate. The effect of chloride ion on TSA can be divided into three stages:inhibition stage, decline stage and failure stage.

    参考文献
    [1]LEE S T,PARK D W,ANN K Y.Mitigating effect of chloride ions on sulfate attack of cement mortars with or without silica fume[J].Canadian Journal of Civil Engineering,2008,35(11):1210 1220.
    [2]Al AMOUDI O S B,RASHEEDUZZAFAR,MASLEHUDDIN M,et al.Influence of chloride ions on sulphate deterioration in plain and blended cements[J].Magazine of Concrete Research,1994,46(167):113 123.
    [3]金祖权,孙伟,张云升,等.氯盐对混凝土硫酸盐损伤的影响研究[J].武汉理工大学学报,2006,28(3):43 46.
    JIN Zuquan,SUN Wei,ZHANG Yunsheng,et al.Effect of chloride on damage of concrete attacked by sulfate[J].Journal of Wuhan University of Technology,2006,28(3):43 46.(in Chinese)
    [4]JUSTNES H,RODUM E.Case studies of thaumasite formation[J].ACI Special Publications,2006,234:521 538.
    [5]SIBBIVK T,FENN D,CRAMMOND N.The occurrence of thaumasite as a product of seawater attack[J].Cem Concr Compos,2003,25(8):1059 1066.
    [6]SOTIRIADIS K,NIKOLOPOULOU E,TSIVILIS S.The effect of chloride on the thaumasite form of sulfate attack in lime stone cement concrete[J].Mater Sci Forum,2010,636 637:1349 1354.
    [7]李长成,姚燕,王玲.氯离子对碳硫硅钙石形成的影响[J].硅酸盐学报,2011,39(1):25 29.
    LI Changcheng,YAO Yan,WANG Ling.Effect of chloride ions on thaumasite formation[J].J Chin Ceram Soc,2011,39(1):25 29.(in Chinese)
    [8]ROMER M,HOLZER L,PFIFFNER M.Swiss tunnel structures:Concrete damage by formation of thaumasite[J].Cem Concr Compos,2003,25(8):1111 1117.
    [9]MAR S B, MOHAMMED M,YASER A B.Role of chloride ions on expansion and strength reduction in plain and blended cements in sulfate environments[J].Constr Build Mater,1995,9(1):25 33.
    [10]金祖权,孙伟,张云升,等.混凝土在硫酸盐、氯盐溶液中的损伤过程[J].硅酸盐学报,2006,34(5):630 635.
    JIN Zuquan,SUN Wei,ZHANG Yunsheng,et al.Damage of concrete in sulfate and chloride solution[J].J Chin Ceram Soc,2006,34(5):630 635.(in Chinese)
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李长成,李寿冬,白玉贵. Cl-对掺石灰石粉水泥基材料TSA的影响[J].建筑材料学报,2014,17(3):501-506

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  • 收稿日期:2012-12-21
  • 最后修改日期:2013-01-06
  • 在线发布日期: 2014-06-25
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