通过海砂混凝土中游离氯离子含量的测定,研究了海砂混凝土氯离子吸附和结合特征.利用X射线衍射、扫描电镜和热分析等测试方法对海砂混凝土的微结构和Friedel盐进行了表征.结果表明:海砂混凝土游离氯离子浓度与溶液的萃取温度密切相关,温度越高,游离氯离子浓度越大,萃取温度为65℃时的游离氯离子浓度约为15℃时游离氯离子浓度的2倍;同时粉煤灰砂浆中结合的物理固化离子在较低温度下溶出率低.TG/DTA曲线上没有出现海砂混凝土的Friedel盐吸热峰,而XRD与SEM图中显示海砂混凝土中存在Friedel盐,可能是因为Friedel盐含量较少,导致生成的Friedel盐不稳定.
参考文献
| [1] | Seung-Woo Pack;Min-Sun Jung;Ha-Won Song .Prediction of time dependent chloride transport in concrete structures exposed to a marine environment[J].Cement and Concrete Research,2010(2):302-312. |
| [2] | 施锦杰,孙伟.混凝土中钢筋锈蚀研究现状与热点问题分析[J].硅酸盐学报,2010(09):1753-1764. |
| [3] | Qiang Yuan;Caijun Shi;Geert De Schutter;Katrien Audenaert;Dehua Deng .Chloride Binding Of Cement-based Materials Subjected To External Chloride Environment - A Review[J].Construction and Building Materials,2009(1):1-13. |
| [4] | Investigation of steel corrosion in cracked concrete: Evaluation of macrocell and microcell rates using Tafel polarization response[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2010(8):P.2725. |
| [5] | 金祖权,孙伟,赵铁军,李秋义.在不同溶液中混凝土对氯离子的固化程度[J].硅酸盐学报,2009(07):1068-1072,1078. |
| [6] | Abd El HaleemS M;Abd El Wanees S .Environmental factors affecting the corrosion behavior of reinforcing steel.Ⅳ.Variation in the pitting corrosion current in relation to the concentration of the aggressive and the inhibitive anions[J].Corrosion Science,2010,52(05):1675. |
| [7] | Liu Junzhe;Ba Mingfang;He Zhimin .Microstructure and performance of sludge-ceramisite concrete[J].CONSTRUCTION AND BUILDING MATERIALS,2013,39:82. |
| [8] | 马红岩 .海砂对水泥基材料水化行为及护筋性能的影响研究[D].深圳:深圳大学,2008. |
| [9] | 柳俊哲,邢锋,贺智敏,丁铸.钢筋混凝土中亚硝酸根与氯离子的临界摩尔比[J].硅酸盐学报,2010(04):615-620. |
| [10] | Abate C.;Scheetz BE. .AQUEOUS PHASE EQUILIBRIA IN THE SYSTEM CAO-AL2O3-CACL2-H2O - THE SIGNIFICANCE AND STABILITY OF FRIEDELS SALT[J].Journal of the American Ceramic Society,1995(4):939-944. |
| [11] | Birmin-Yauri U A;Glasser F P .Friedel' s salt,Ca2Al(OH)6 (Cl,OH)2H2O:Its solid solutions and their role in chloride binding[J].Cement and Concrete Research,1998,28(12):1713. |
| [12] | On the penetration of corrosion products from reinforcing steel into concrete due to chloride-induced corrosion[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2010(7):2469. |
| [13] | Abd El Haleem S M;Abd El Wanees S .Environmental factors affecting the corrosion behavior of reinforcing steel Ⅱ.Role of some anions in the initiation and inhibition of pitting corrosion of steel in Ca(OH)2 solutions[J].Corrosion Science,2010,52(02):292. |
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