北方低温环境影响混凝土寿命的因素研究  

Research on factors that affect the durability of concrete under Northern low temperature environment

作　　者：姜蔚[1] 王幼清[2] 闫波[3] 

机构地区：[1]哈尔滨理工大学建筑设计研究院,哈尔滨150080 [2]哈尔滨工业大学土木工程学院,哈尔滨150090 [3]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《黑龙江大学自然科学学报》2009年第3期371-374,401,共5页Journal of Natural Science of Heilongjiang University

基　　金：黑龙江省自然科学基金资助项目(E0302)

摘　　要：为探讨低温下环境因素对混凝土寿命的影响,弄清低温下酸、碱、盐和CO2对混凝土耐久性的作用,分别对这几种污染因子与混凝土的反应进行了试验,对其作用机制进行了研究。结果表明:CO2引起的碳化、酸碱类引起的腐蚀和盐类引起的盐胀是促使混凝土破坏的重要原因之一,它们基本上是化学过程;而冻融循环则加重了这种破坏,它基本上是一个物理过程。因此混凝土使用耐久性或者破坏过程往往是这些因素综合作用的结果。In order to investigate the impact of environmental factors under low temperature to concrete and make clear the effects of acid, alkali, salt and carbon dioxide to durability of concrete, experiments for the reactions of these pollution factors with concrete were done to research the function mechanism between them. Studies have shown that carbonation caused by carbon dioxide, acid and alkaline corrosion and salt- induced expansion, which generally speaking are chemical processes, are essential reasons of concrete damage. And the damage is aggravated by freeze -thaw cycles, which are physical processes. Therefore, the durability or the destroying process of concrete is always the result of all these factors.

关 键 词：低温环境 混凝土寿命 碳化 酸碱腐蚀 盐胀 冻融循环 

分 类 号：X503.5[环境科学与工程—环境工程]