滨海环境下既有混凝土结构耐久性分析与评定
Durability analysis and assessment of existing concrete structures in coastal environment
闵红光 1胡俊杰 1姚志东 1闫贵海 1赵木子1
作者信息
- 1. 中冶建筑研究总院(深圳)有限公司,广东深圳 518055
- 折叠
摘要
通过对珠海市体育中心4个场馆的混凝土微观结构、孔径分布和氯离子含量分布进行分析,研究了滨海环境下既有混凝土结构的耐久性能并对其耐久性等级进行了评定.结果表明:滨海环境下既有混凝土结构均存在不同程度的硫酸盐和氯盐侵蚀问题,处于室外迎风面和潮湿环境的混凝土构件遭受硫酸盐和氯盐侵蚀问题较为严重,混凝土中大孔所占的比例较小;而处于室外背风面和室内环境的混凝土构件所面临的侵蚀问题则较轻,混凝土中大孔所占的比例则较大.基于滨海环境下既有混凝土结构耐久性能分析结果,评定珠海市体育中心4个场馆的混凝土结构耐久性不满足要求并给出耐久性处理措施.
Abstract
By analyzing the microstructures,pore size distributions,and chloride profiles of concrete in four venues of Zhuhai Sports Center,the durability performance of existing concrete structures in coastal environments was studied and their durability levels were assessed.The results indicate that existing concrete structures in coastal environments have varying degrees of sulfate attack and chloride erosion problems.Concrete members located on outdoor windward and humid environments are more severely affected by sulfate attack and chloride erosion,and the proportion of large pores in concrete is relatively small;The corrosion problems faced by concrete members located on the outdoor leeward and indoor environments are relatively light,and the proportion of large pores in concrete is relatively large.Based on the durability analysis results of existing concrete structures in coastal environments,it is assessed that the durability of the concrete structures of the four venues in Zhuhai Sports Center does not meet the requirements and the durability treatment measures are provided.
关键词
滨海环境/既有混凝土结构/微观结构/氯盐侵蚀/耐久性评定Key words
coastal environment/existing concrete structure/microstructure/chloride erosion/durability assessment引用本文复制引用
基金项目
广东省重点领域研发计划项目(2019B111107002)
出版年
2024
NETL
NSTL
万方数据