碳化作用下不同氯盐掺量水泥浆体的微结构研究
PDF下载 (383)仉明明,林 楠,王建民,柳俊哲.碳化作用下不同氯盐掺量水泥浆体的微结构研究[J].宁波大学学报(理工版),2022,35(6):41-46.DOI:
ZHANG Mingming,LIN Nan,WANG Jianmin,LIU Junzhe.Microstructure study of cement paste with different chloride contentsunder carbonation[J].Journal of Ningbo University(Natural Science & Engineering Edition),2022,35(6):41-46.DOI:
| Title: | Microstructure study of cement paste with different chloride contentsunder carbonation |
| 作者: | 仉明明, 林 楠, 王建民, 柳俊哲 |
| Author(s): | ZHANG Mingming, LIN Nan, WANG Jianmin, LIU Junzhe |
| 关键词: | 水泥基材料; 碳化; 氯盐; 孔结构; 碳化深度 |
| Keywords: | cement-based materials; carbonation; chloride salt; pore structure; carbonation depth |
| 分类号: | TU528 |
| 文献标识码: | A |
| 摘要: | 通过加速碳化试验方法, 研究了碳化与氯盐复合作用下水泥浆体的微观结构, 分析了氯盐掺量对水泥基材料的抗碳化性能的影响. 同时, 利用X射线衍射分析了碳化前后样品的物相组成、水化产物类型和微观结构特征. 结果表明, 碳化养护更有利于浆体裂缝的愈合, 但碳化后大孔占比增加; 碳化作用下掺加氯盐会减缓水泥浆碳化速度; 碳化后产生单硫型水化硫铝酸钙和碳酸盐类物质, 钙矾石消失, 浆体的孔隙总体积减少, 孔隙结构得到了细化. |
| Abstract: | The microstructure of cement paste under the compound effect of carbonation and chloride salt was studied by accelerated carbonation test method, and the effect of chloride salt dosing on the anti-carbonation performance of cementitious materials was analyzed. Meanwhile, the physical phase composition, hydration product types and microstructure characteristics of the samples before and after carbonation were analyzed by X-ray diffraction. The results show that carbonation maintenance is more favorable to the healing of slurry cracks, but the percentage of macropores increases after carbonation. The addition of chlorine salts under carbonation slows down the carbonation of cement paste. Monosulfoaluminate hydrate and carbonates are produced after carbonation, and calcium alumina disappears. The total pore volume of the paste is reduced and the pore structure is refined as well. |
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| 备注/Memo: | 收稿日期:2022-03-03.宁波大学学报（理工版）网址:http://journallg.nbu.edu.cn/ 基金项目:国家自然科学基金（51778302）. 第一作者:仉明明（1999－）,女,山东潍坊人,在读硕士研究生,主要研究方向:混凝土结构耐久性.E-mail:17861502032@163.com *通信作者:柳俊哲（1964－）,男,黑龙江五常人,教授,主要研究方向:混凝土结构耐久性.E-mail:junzheliu@163.com 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
