摘要
制备了普通混凝土柱和掺加20%复合超细粉高性能混凝土柱10根。基于相似理论,设计了针对沿海混凝土结构所处不同环境区域(水下区、水位变动区和大气区)的人工气候腐蚀试验方案。通过静载试验,研究了海水腐蚀柱的破坏形态和承载力。结果表明:海水腐蚀柱破坏过程与普通混凝土柱没有明显的差异;当以海洋环境下裂缝宽度为耐久性控制指标时,钢筋锈蚀引起的混凝土损伤对竖向构件承载力的影响可以忽略不计;掺加矿物掺合料可以提高混凝土抵抗海水侵蚀的能力,但对构件承载力影响不大,同时采取一定的技术措施防止早龄期混凝土结构氯离子污染是必须的。
The ten columns of ordinary concrete and HPC concrete are made.Based on similar theory,the accelerated corrosion test of artificial climate simulation in various environments（submersion zone,water level changing zone,and atmosphere zone） of marine structure is designed.The failure pattern and bearing capacity of corroded column were researched by static load test.The test results show that the failure period of marine corroded column has no obviously differentiation with ordinary concrete column.The influence of bearing capacity caused by concrete damage can be negligible if the crack width in marine environment is taken as control index of durability.Adding mineral admixtures is very effective to improve concrete structure marine corrosion resistance but to the capacity is not very remarkable.It is advisable to avoid early age concrete structure contaminated by chloride through some technological measures.
出处
《混凝土》
CAS
CSCD
北大核心
2010年第7期19-21,共3页
Concrete
基金
国家"973"计划课题(2009CB623203)
国家自然科学基金资助项目(50378045)
教育部博士点基金(20070429001)
