摘要
水泥基材料的氯离子结合能力主要取决于水化硅酸钙(C-S-H)凝胶和Friedel’s盐的含量及其稳定性,两者的含量越高、稳定性越好,水泥基材料的氯离子结合能力越强。对水泥基材料氯离子结合能力的分析需考虑多种因素的影响,如水泥种类、矿物掺合料种类、温度、氯离子浓度、阳离子类型、硫酸盐侵蚀和碳化等因素,它们会通过直接影响C-S-H凝胶和Friedel’s盐的生成量,或间接影响孔隙液pH值和离子浓度改变C-S-H凝胶和Friedel’s盐的稳定性,进而影响其物理吸附能力与化学结合能力,促使氯离子重新结合或释放,导致氯离子结合能力变化显著。本文综述了上述影响因素下,水泥基材料中C-S-H凝胶和Friedel’s盐含量、稳定性的变化,及其对氯离子结合能力的影响,并为今后的研究方向提出了建议。
The chloride ion binding ability of cement-based materials mainly depends on the content and stability of hydrate calcium silicate(C-S-H)gel and Friedel’s salt,and the high content and the great stability of both are benefit to improve the chloride ion binding ability.The influences of various factors,such as cement type,mineral admixture type,temperature,chloride ion concentration,cation type,sulfate erosion and carbonization should be considered in the analysis of the chloride ion binding ability of cement-based materials.They will directly affect the production of C-S-H gel and Friedel’s salt,or indirectly affect the pH value and ion concentration of pore fluid to change the stability of C-S-H gel and Friedel’s salt,thus affecting their physical adsorption ability and chemical binding ability,and promoting the recombination and release of chloride ions,eventually,causing significant change in chloride ions binding ability.In this paper,the changes of C-S-H gel and Friedel’s salt content and stability in cement-based materials under the above factors,as well as their influences on chloride ion binding ability were reviewed,and some suggestions for future research were put forward.
作者
耿圆洁
孙丛涛
孙明
张余果
段继周
GENG Yuanjie;SUN Congtao;SUN Ming;ZHANG Yuguo;DUAN Jizhou(School of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China;Open Studio for Marine Corrosion and Protection,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China;Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Nantong Research and Development Center of Marine Science and Technology,Institute of Oceanology,Chinese Academy of Sciences,Nantong 226004,China;School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China)
出处
《硅酸盐通报》
CAS
北大核心
2022年第8期2604-2617,共14页
Bulletin of the Chinese Ceramic Society
基金
山东省自然科学基金(ZR2020KE046)
国家重大科研仪器研制项目(41827805)
南通市科技项目(JC2020125)。
