盐湖环境下混凝土表面氯离子浓度的时变性研究  

Experimental analysis on time-dependent law of surface chloride ion concentration of concrete

作　　者：李长成[1] 张立明[1] 沈艳东[1] 

机构地区：[1]吉林交通职业技术学院,吉林长春130012

出　　处：《混凝土》2014年第10期41-43,共3页Concrete

基　　金：国家重点基础研究发展计划("973"计划)项目(2009CB623203);国家自然科学基金项目(51178221);浙江省自然科学基金项目(LY12E08003)

摘　　要：采用盐湖卤水浸泡试验,定期检测了混凝土不同深度的自由氯离子含量,并对数据进行了拟合分析,研究了混凝土表面氯离子浓度随时间的变化规律,分析了水灰比和粉煤灰掺量对表面氯离子浓度大小影响。结果表明,表面氯离子浓度随时间的增加逐渐增长并最终达到稳定状态。随着水灰比的增大而增大;随着粉煤灰掺量的增大先降低后增加。通过对现有模型的比较,提出了更适合是盐湖环境的表面氯离子浓度的模型。Immersion in salt lake brine was adopted to periodically test chloride ion concent at different depths of concrete and regression analysis was completed.Variation law of surface chloride ion concrete with time was investigated.Effect of water to cement ratio and fly ash content on size of surface chlorideion concent ration were also analyzed.Test result showed that surface chloride ion concentration gradually grew with the increase of time and reaches a steady state lastly.With the increase of water to cement ratio meant greater surface chloride ion concentration.Surface chloride ion concentration first increased and then decreased with the increase of fly ash content.An adapted model was proposed by comparison and correction of current models.

关 键 词：盐湖卤水 混凝土 表面氯离子浓度 时变性 

分 类 号：TU528.01[建筑科学—建筑技术科学]