土木与环境工程学报（中英文）2024，Vol.46Issue(4)：186-192,7.DOI:10.11835/j.issn.2096-6717.2022.042
强电场作用下早龄期混凝土的氯离子迁移特征
Characteristics of chloride ion migration in early-age concrete under strong electric field
摘要
Abstract
Electrochemical chloride extraction can effectively eliminate harmful chloride ions of concrete structures and reduce the failure risk of concrete structures.The electrochemical dechlorination of concrete structure was carried out by means of strong electric field,and the strong electric field action of 40 min,80 min and 120 min was involved in different early ages.The change and distribution characteristics of internal chloride content were tested,and the springback strength test was carried out on the specimens cured for 28 days after electrification.The results show that the chlorine removal efficiency can be significantly improved by the intervention of strong electric field at an early age,and the working time is about 1/300 of the traditional electrochemical methods when reaching the same chlorine removal effect.The distribution characteristics of chloride ions show that the distribution of free chloride ions is more uniform than that of traditional electrochemical parameters,and the bound chloride ions still have the phenomenon of accumulation in the middle of the protective layer.The standard curing is carried out after the action of strong electric field,and the rebound test results show that the strong electric field has no obvious effect on the macroscopic strength of the concrete protective layer.关键词
混凝土结构/电化学除氯/养护期/强电场/结构耐久性Key words
concrete structure/electrochemical chloride extraction/maintenance period/strong electric field/durability of structures分类
建筑与水利引用本文复制引用
金立兵,王培胜,毛江鸿,樊玮洁,何建明..强电场作用下早龄期混凝土的氯离子迁移特征[J].土木与环境工程学报（中英文）,2024,46(4):186-192,7.基金项目
国家自然科学基金(51878610、51638013、51509084) （51878610、51638013、51509084）
宁波市科技重大专项(2020Z056) （2020Z056）
河南省科技攻关计划(212102110191) National Natural Science Foundation of China(Nos.51878610,51638013,51509084) （212102110191）
Ningbo Science and Technology Major Project(No.2020Z056) （No.2020Z056）
Henan Science and Technology Research Program(No.212102110191) （No.212102110191）
