水泥浆体中氯盐阳离子种类对游离氯离子浓度的影响  

The influence of chloride cation type on the concentration of free chloride ion in cement paste

作　　者：林楠[1] 江乐鑫 杨梦娜 柳俊哲[1] LIN Nan;JIANG Lexin;YANG Mengna;LIU Junzhe(School of Civil and Environmental Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学土木与环境工程学院,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2020年第4期77-81,共5页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(51778302).

摘　　要：研究了不同阳离子氯盐作用下,水泥净浆中游离氯离子浓度和结合氯离子浓度的变化,并通过X射线衍射技术和电镜扫描分析技术观察其微观状态.结果表明:掺氯化钠的试件中游离氯离子浓度更高,钙离子对氯离子的结合能力更强;氯化钙比氯化钠更易与水泥熟料发生反应,生成水化产物Friendel复盐和C-S-H凝胶;掺氯化钙的试块表面晶体更为细密且结构多样.The change of the concentration of free chloride ion and combined chloride ion in cement paste is investigated under the reaction of different cationic chloride salts.The results suggest that the concentration of free chloride ions reads higher in the sample mixed with sodium chloride,and the binding force of calcium ions to chloride ions turns out to be stronger.Calcium chloride reacts with cement clinker more easily than sodium chloride to produce Friendel compound salt and C-S-H gel.The crystals on the surface of the test piece doped with calcium chloride are more compact and possess various structures.

关 键 词：水泥基材料 阳离子类型 游离氯离子浓度 钙矾石 氯盐掺量 

分 类 号：TU528.0[建筑科学—建筑技术科学]