饱和度对碱矿渣砂浆抗碳化性能的影响  

Influence of Saturation Degree on Carbonization Resistance of Alkali-Activated Slag Mortar

作　　者：廖子墨 肖泽荣 郑祥增 江璇 季韬[1] LIAO Zimo;XIAO Zerong;ZHENG Xiangzeng;JIANG Xuan;JI Tao(College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;Fuzhou Planning&Design Research Institute Group Co.,Ltd.,Fuzhou 350108,China;Transportation and Construction Bureau of Pingtan Comprehensive Experimental Zone,Pingtan 305400,China)

机构地区：[1]福州大学土木工程学院,福建福州350108 [2]福州市规划设计研究院集团有限公司,福建福州350108 [3]福建省平潭综合实验区交通与建设局,福建平潭305400

出　　处：《建筑材料学报》2024年第11期1054-1059,1070,共7页Journal of Building Materials

基　　金：国家自然科学基金资助项目(52278248)。

摘　　要：采用X射线衍射、热重分析、核磁共振和压汞法,研究了饱和度对以水玻璃为激发剂的碱矿渣砂浆(ASm)抗碳化性能的影响.结果表明,随着饱和度的降低,水化硅(铝)酸钙(C-(A)-S-H)凝胶脱钙更严重,ASm总孔隙率增大,最可几孔径增加,碳化生成的亚稳态文石和球霰石增多,ASm抗碳化性能变差,抗压强度保留率降幅和碳化深度增幅降低.The influence of saturation degree on the carbonation resistance of alkali-activated slag mortar(ASm)with water glass as activator was studied by X-ray diffraction,thermogravimetric analysis,nuclear magnetic resonance,and mercury intrusion porosimetry.The results show that with the decreases of saturation degree,the decalcification of calcium alumino silicate hydrate(C-(A)-S-H)gel becomes more severe,the total porosity and the most probable pore size of ASm increase.The unstable aragonite and vaterite generated by carbonation increase with the decreases of the saturation degree,resulting in the deterioration of the carbonation resistance of ASm.With the decreases of saturation degree,the reduction in compressive strength retention rate and the increase in carbonation depth of ASm are decreased.

关 键 词：碱矿渣砂浆 饱和度 C-(A)-S-H凝胶 抗碳化性能 

分 类 号：TU526[建筑科学—建筑技术科学]