混凝土早期性能与后期耐久性相关性研究  

Study on Relation Between Early-age Performance of Concrete and Its Durability

作　　者：陈璨[1] 赵羽习[1] 金伟良[1] 

机构地区：[1]浙江大学结构工程研究所,浙江杭州310058

出　　处：《施工技术》2013年第10期39-41,共3页Construction Technology

基　　金：中央高校基本科研业务专项资金资助项目(2012FZA4018);教育部"新世纪优秀人才支持计划"项目(NCET-12-0493)

摘　　要：对4种不同振捣、养护工况下混凝土试件的早期性能和后期耐久性能进行试验测试,并对混凝土早期性能和后期耐久性能的相关性进行研究。试验研究发现:振捣、养护不当不但会降低混凝土立方体抗压强度,且严重影响混凝土抗渗性;不良施工条件还会大幅度增大氯离子扩散系数,加速混凝土内钢筋锈蚀速率;振捣条件对混凝土结构耐久性的影响很大。研究结果表明:混凝土结构工程质量验收仅考虑混凝土强度指标是不够的,验收过程中同时应考虑混凝土耐久性指标的测试,如混凝土透气性,以保证混凝土结构长期使用性能符合设计与规范要求。The material properties in construction age and long-time durability of concrete in four kinds of construction conditions were tested.Based on these tested data,the correlations between early-age material properties and long-time durability were analyzed.The tested results show that the improper vibrating and pouring methods not only damage the strength of concrete,but also influence the permeability of concrete.The improper construction condition could increase the values of chloride ion diffusion index and accelerated the reinforcement corrosion speed.The influence of vibrating condition on the durability of concrete is very large.It is necessary to introduce the concrete durability as a control index,such as concrete permeability to guarantee the quality of concrete structures to meet the requirements of relative codes and standards except the strength.

关 键 词：混凝土 早期性能 耐久性 质量验收 

分 类 号：TU528[建筑科学—建筑技术科学]