混凝土结构耐久性浅谈

混凝土结构耐久性浅谈摘要通过多年的工程施工及工程监理工作经验，作者阐述了现阶段施工中混凝土结构存有的耐久性难题，给出了影响混凝土结构耐久性的影响因素，阐述了施工中比较常见的混凝土结构耐久性对策，融合目前在我国具体情况，阐述了目前国内设计方案施工中存有的些在我国是发展过程中大国，从业大规模基建项目。伴随着现代主义建筑持续向高层住宅化大跨距化及地底化方面发展，混凝土耐久性应变成建筑界关注的焦点难题。关键词：混凝土：耐久性：影响因素；措施Discussion on durability of concrete structureAbstractThrough many years of experience in engineering construction and engineering supervision,the author expounds the durability problems existing in the concrete structure in the current stageof construction,gives the influencing factors that endanger the durability of the concretestructure,expounds the relatively common concrete structure durability countermeasures in theconstruction,combines the current specific situation in China,and expounds that some of theproblems existing in the current domestic design scheme construction are large countries in thedevelopment process in China,Engaged in large-scale infrastructure projects.With thecontinuous development of modernist architecture towards high-rise residential,large-span andunderground,the durability of concrete should become the focus of the building community.Key words:Concrete;Durability;Influencing factors;measures.目录1.绪论1.1.混凝土耐久性问题的提出.1.2.混凝土耐久性的概念.…2.混凝土结构耐久性问题的分析…..22.1.混凝土冻融破坏…22.1.1.破坏机理….22.1.2.影响因素….32.2.混凝土渗透破坏…32.2.1.破坏原因.32.2.2.影响因素….42.3.碱骨料反应…2.4.混凝土的碳化...42.4.1.破坏原因..42.4.2.影响因素2.5.钢筋锈蚀。2.5.1.破坏原因.52.5.2.影响因素..63.提高混凝土耐久性的措施3.1.合理选择混凝土结构的组成材料.73.1.1.混凝土各组成材料及钢筋的选用.73.1.2.抗硫酸盐腐蚀.73.1.3.掺入高效减水剂3.1.4.抗碳化…83.2.控制施工质量….83.2.1.控制施工质量.…..83.2.2.抗磨损..83.3.改进结构设计…93.4.采用高强混凝土以提高结构物的耐久性93.5.消除混凝土自身的结构破坏因素….93.6.其他.94.案例分析….104.1.工程概况….104.2.裂缝分布情况及特征..104.3.裂缝产生的原因分析…105.结论与展望.12参考文献.13致谢.….14