地铁隧道管片蒸养混凝土耐久性试验研究  

Study on the durability properties of steam-cured concrete for subway tunnel segment

作　　者：张勇[1,2] 周华新[1,2] 崔巩[1,2] 刘建忠[1,2] 

机构地区：[1]江苏省建筑科学研究院,江苏南京210008 [2]江苏博特新材料有限公司,江苏南京210008

出　　处：《混凝土》2010年第7期119-121,共3页Concrete

摘　　要：采用最紧密堆积理论进行地铁隧道管片混凝土配合比设计,并对地铁隧道管片混凝土抗冻性能、抗氯离子腐蚀及抗碳化性能等耐久性能进行了试验研究。试验结果表明:蒸汽养护过程虽然能加速混凝土的硬化,但是会降低混凝土的抗碳化性能、抗冻性能及抗氯离子腐蚀能力;掺入矿物掺合料对蒸养混凝土的抗氧离子侵蚀性能具有明显的改善作用,矿碴与粉煤灰双掺时效果更为明显。In this paper,the theory of the most compact has been applied to design the mix proportion of the Steam-cured concrete,and the durability（freezing-thawing,chloride ion diffusion,carbonation,etc） of Subway Tunnel Concrete Segment was systematic studied.The results show that early application of steam curing can accelerate the formation of ettringite and the rate of strength development,but it tends to reduce the freeze thawing resistance and carbonation resistance and chloride ion diffusion resistance.Mineral admixtures can improve the chloride permeability resistance,the chloride permeability resistance of concrete can be improved greatly through adding fly ash and fine slag dust with reasonable proportion.

关 键 词：隧道管片 蒸汽养护 混凝土 矿物掺合料 耐久性 

分 类 号：TU528.064[建筑科学—建筑技术科学]