内掺氯盐对粉煤灰系硬化水泥水化行为的影响  

Effect of chloride salt on the hydration behavior of fly ash-hardened cement

作　　者：马奥博 张世义 方志胜 齐文杰 MA Aobo;ZHANG Shiyi;FANG Zhisheng;QI Wenjie(School of Civil Engineering and Geomatics,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学建筑工程与空间信息学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2024年第5期19-24,共6页Journal of Shandong University of Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51908342)。

摘　　要：为分析水泥浆中氯离子对水泥水化过程的影响,研究了不同氯离子浓度条件下水泥试件微观形貌和孔隙结构的变化规律,探讨了水泥水化过程中氯离子与水化产物的结合机理。结果显示:氯离子与水泥反应生成Friedel’s盐,可促进水泥的水化速率和进程;增加氯盐浓度可以促进水化;氯离子参与水化后C-S-H凝胶数量增加,AFt数量减少,1.3%氯离子浓度水泥较未掺氯盐C-S-H凝胶生成量增加18.62%,AFt生成量减少32.67%;掺加氯盐后水化产物之间联系密切,可减小水泥试件的孔隙率,细化孔径,增加微观结构的致密性。In order to analyze the influence of chloride ions in cement slurry during the cement hydration process,the changes of micromorphology and pore structure of cement specimens under different chloride ion concentrations were studied.The bonding mechanism between chloride ions and hydration products during cement hydration was discussed.The results showed that the chloride ions reacted with cement to form Friedel's salt,which could promote the hydration rate and the process.Increasing the concentration of chloride salt could promote hydration.The number of C-S-H gels increased after chloride ions participated in hydration and the number of AFt decreased.The generation of C-S-H gel increased by 18.62%and AFt decreased by 32.67%in 1.3%chloride concentration cement compared with that in unadulterated cement.The close relationship between hydration products after adding chloride salt can reduce the porosity of cement specimens,refine the pore size and increase the compactness of the microstructure.

关 键 词：水泥基材料 氯离子结合 水泥水化 海砂 

分 类 号：TB532.1[理学—物理] TB553[理学—声学]