氯离子侵蚀下钢筋混凝土结构耐久性寿命预测——经典模型对比与分析  

Durability life prediction of reinforced concrete structures under chloride ingress:a review of classic models

作　　者：丁娅 秦晓川 周莹 刘加平 石亮[1,2] 穆松 DING Ya;QIN Xiaochuan;ZHOU Ying;LIU Jiaping;SHI Liang;MU Song(State Key Laboratory of High Performance Civil Engineering Materials,Jiangsu Research Institute of Building Science,Nanjing 210008,China;Jiangsu Sobute New Materials Co.,Ltd.,Nanjing 211103,China;School of Materials Science and Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]高性能土木工程材料国家重点完验室江苏省建筑科学研究院,江苏南京210008 [2]江苏苏博特新材料股份有限公司,江苏南京211103 [3]东南大学材料科学与工程学院,江苏南京211189

出　　处：《混凝土》2020年第12期15-20,共6页Concrete

摘　　要：介绍了钢筋混凝土结构在氯离子环境下的耐久性和服役寿命预测模型。过去几十年,众多学者提出了大量氯离子环境下混凝土结构使用寿命的计算模型。对一些常用的混凝土抗氯离子侵蚀权威模型进行了详细的评述。根据海洋环境现场暴露10年的数据,对DuraCrete模型和Life365模型进行了验证。通过对比现场暴露数据与模型理论值,可以发现,DuraCrete模型易高估早期氯离子侵入混凝土的行为,但随着时间延长,DuraCrete模型将低估氯离子侵入混凝土的行为。相对地,Life365模型预测的氯离子浓度更准确。此外,对存在的有关问题进行了讨论,提出了需要改进的建议和深入研究的方向。The durability and service life prediction models of reinforced concrete structures under chloride ion environment are introduced in this work.A number of models for service life of concrete structures under chloride environment have been suggested in the past decades.In this work,some often-used authoritative models for concrete resistance to chloride ingress were reviewed in detail.Two models including the DuraCrete and the Life365 for chloride profile prediction were validated using the in-situ data over 10 years marine environment exposure.By comparing the exposure data with the theoretical values of the models,it can be found that DuraCrete model overestimates the behavior of chloride ion diffusion into concrete at early stage,but over time,DuraCrete model will underestimate the behavior of chloride ion diffusion into concrete.Oppositely,the Life365 model gives better chloride profiles.In addition,the existing problems are discussed,and some research topics deserved further studies are proposed.

关 键 词：混凝土 耐久性 服役寿命 模型 验证 

分 类 号：TU528.571[建筑科学—建筑技术科学]