有机添加剂对电化学除盐效率的影响研究
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摘要
为了研究有机添加剂在电化学脱盐过程中对除盐效率的影响规律,在电解质溶液中加入了阴、阳离子表面活性剂,定期检测其排出的氯离子量,并对经脱盐后砂浆试块粉末进行X射线衍射分析(XRD),结果表明:两种类型的有机添加剂均能够有效地增强脱盐效率,脱盐效率提高约1倍,其中阴离子表面活性对除盐效率的提高大于阳离子表面活性剂;当水灰比减小时,两种有机添加剂脱盐效率的提高进一步增强;同时,氯离子含量减小时,两种有机添加剂对脱盐效率的提高愈发显著。XRD分析显示,加入有机添加剂,经脱盐处理后的试块中Friedel’s盐含量减少。
For studying the influence of organic additives on the efficiency of chloride extraction,cationic and anionic surfactants were applied in electrolytic solution.The content of chloride ion in the electrolytic solution is periodically measured.Besides,the chemical phases of mortarspecimen were analyzed by X-ray diffraction(XRD).The results show that the organic additives can increase the efficiency of chloride extraction.The value of increasing is double and cation surface active agent increase the efficiency of chloride extraction greater than anionic surfactants.In the cement mortar with low W/C ratio,the increasing effect of organic additive on chloride extraction efficiency are more notable.When the chloride content is decreased,the increasing effect of two organic additives on the efficiency of chloride extraction is increased.XRD analysis showed that the Friedel'ssalt in the mortar after the treatment of chloride extraction is reduced after adding organic additives.
For studying the influence of organic additives on the efficiency of chloride extraction,cationic and anionic surfactants were applied in electrolytic solution.The content of chloride ion in the electrolytic solution is periodically measured.Besides,the chemical phases of mortarspecimen were analyzed by X-ray diffraction(XRD).The results show that the organic additives can increase the efficiency of chloride extraction.The value of increasing is double and cation surface active agent increase the efficiency of chloride extraction greater than anionic surfactants.In the cement mortar with low W/C ratio,the increasing effect of organic additive on chloride extraction efficiency are more notable.When the chloride content is decreased,the increasing effect of two organic additives on the efficiency of chloride extraction is increased.XRD analysis showed that the Friedel'ssalt in the mortar after the treatment of chloride extraction is reduced after adding organic additives.
引文
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[2]VELIVASAKIS E E,HENRIKSEN S K,WHITMORE D W.Halting corrosion by chloride extraction and realkalization[J].Concrete International,1997,19(12):39-45.
[3]彭宝利,郑靓,王新祥,等.电化学除盐方法对钢筋-混凝土界面黏结的影响[J].混凝土,2007(7):26-28.
[4]徐建芝,丁铸,邢峰.钢筋混凝土电化学脱盐修复技术研究现状[J].混凝土,2008(9):22-24.
[5]魏宝明,储炜.混凝土中钢筋的腐蚀与防护[J].腐蚀与防护,1999,20(2):56-58.
[6]张羽,张俊喜,王昆,等.电化学修复技术在钢筋混凝土结构中的研究及应用[J].材料保护,2009(8):51-55.
[7]程霞,何积铨,朱志勇.电化学方法在砂浆样除氯方面的应用研究[J].化工技术与开发,2012(1):4-7.
[8]郭育霞,贡金鑫.钢筋混凝土电化学除氯的试验研究[J].太原理工大学学报,2011(6):588-592.
[9]丁铸,邢锋,李伟华.钢筋混凝土电化学脱盐影响因素的研究[J].武汉理工大学学报,2009(7):19-21+34.
[10]范庆新,余其俊,成立,等.电化学脱盐技术及其效果初探[J].混凝土,2005(12):101-104.
[11]沈尔卜,方达经,王亚平,等.钢筋混凝土结构电化学脱盐效率的影响因素研究[J].全面腐蚀控制,2013(3):40-44+57.
[12]尤慧艳.电渗及其在色谱中的应用[M].北京:科学出版社,2010.
[13]周传检,黄柳云,李秋芳,等.常用表面活性剂的性能分析比较[J].中国洗涤用品工业,2013(12):77-79.
[14]近藤精一.吸附科学[M].北京:化学工业出版社,2006.
[15]王雪亮.几种表面活性剂的去污性能比较[J].中国洗涤用品工业,2007(3):62-65.
[16]侯五爱,郭毓琪,刘伟.常用洗衣粉中表面活性剂含量及去污能力的测定[J].山西大同大学学报(自然科学版),2011(5):41-42+57.