高强薄壁U型渡槽混凝土长龄期服役表面碳化性状分析  

Analysis of Long-ge Service Surface Carbonation Behavior of High-rength Thin-walled U-shaped Aqueduct Concrete

作　　者：蔡灿旭 蔡杰龙 王梓鑫 CAI Canxu;CAI Jielong;WANG Zixin(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China;Guangdong New Material and Structural Engineering Technology Research Center,Guangzhou 510635,China;Guangdong Provincial Key Scientific Research Base,Guangzhou 510635,China)

机构地区：[1]广东省水利水电科学研究院,广州510635 [2]广东省水利新材料与结构工程技术研究中心,广州510635 [3]广东省水利重点科研基地,广州510635

出　　处：《广东水利水电》2024年第9期75-79,共5页Guangdong Water Resources and Hydropower

摘　　要：以国内某大型供水工程高强薄壁U型渡槽结构混凝土为实例,通过对宏观性能与微观组成结构分析,研究经10 a以上长龄期服役运行后,混凝土外表面碳化性状的变化。宏观性能测试结果表明,高强、薄壁、U型渡槽槽身混凝土抗压强度保持良好,表面碳化程度较低,钢筋未见明显锈蚀,其抵抗自然环境CO_(2)等酸性气体侵蚀的能力较强,而微观组成与结构的研究结果较好得印证了混凝土的宏观性能表现。In this paper,taking the high-strength thin-walled U-shaped aqueduct concrete of a large water supply project in China as an example,through the analysis of macro-performance and micro-structure,the change of carbonation behavior of concrete outer surface after more than 10 years of service is studied.The macroscopic performance test results show that the high-strength,thin-walled and U-shaped aqueduct body concrete has good compressive strength,low surface carbonation,no obvious corrosion of steel bar,and strong resistance to acid gas such as CO_(2) in the natural environment.The research results of micro-composition and structure well confirm the macroscopic performance of concrete.

关 键 词：渡槽 薄壁混凝土 碳化性状 微观组成与结构 

分 类 号：TV672.3[水利工程—水利水电工程] TU528[建筑科学—建筑技术科学]