碳纤维布加固混凝土柱耐久性研究  

RESEARCH ON DURABILITY OF CONCRETE COLUMNS STRENGTHENED WITH CERP

作　　者：喻林[1] 王凤霞[1] 蒋林华[1] 

机构地区：[1]河海大学材料科学与工程学院,南京210098

出　　处：《低温建筑技术》2009年第10期5-7,共3页Low Temperature Architecture Technology

基　　金：江苏省建筑工程管理局项目(JS200438)

摘　　要：为了研究碳纤维布加固混凝土柱的耐久性能,将加固后的混凝土柱放置在自然环境、水环境、酸环境、碱环境、碳化环境中14d及56d。通过测量混凝土柱的抗压强度及破坏形式来评价侵蚀介质对碳纤维加固混凝土柱耐久性能的影响。研究表明在本试验中,酸环境对碳纤维加固混凝土柱的抗压强度影响较大,浸泡14d后抗压强度仅为自然条件下的80.9%,其次为碱环境、水环境、碳化环境。56d后各种环境对碳纤维加固混凝土柱抗压强度的影响规律和14d的一致。在各种环境中碳纤维加固混凝土柱的受压破坏形式基本相同。破坏形式均为混凝土被压碎、碳纤维布断开,断开的部位在混凝土柱的下端三分之一处附近。In order to study on durability of concrete columns strengthened with CFRP, concrete columns strengthened was placed in the natural environment, water environment, acid environment, alkaline environment, carbonation environment for 14d and 56d. Effect of erosion medium on durability of concrete columns strengthened with CFRP was evaluated By measuring the compressive strength of concrete columns and the form of destruction. In this experiment the results showed that the compressive strength of concrete columns strengthened with CFRP was reduced due to acid environment. The compressive strength of concrete columns after immersion in acid solution for 14d was 80.9% of that under natural conditions, followed by alkaline environment, water environment, carbonation environment. Effect the environments on the compressive strength of concrete columns strengthened with CFRP after 56d was identified with that ofter 14d. Destruction forms of all concrete columns in a variety of environment was same. Concrete was crushed, CFRP was disconnect and disconnected parts of CFRP was near by one-third of the concrete columns bottom.

关 键 词：碳纤维 加固 混凝土 耐久性 

分 类 号：TU528.582[建筑科学—建筑技术科学]