单盐侵蚀与冻融循环作用下混凝土耐久性能试验研究  

EXPERIMENTAL STUDY OF CONCRETE DURABILITY UNDER THE ACTION OF SINGLE SALT CORROSION AND FREEZING-THAWING CYCLES

作　　者：宿晓萍[1] 张利[1] 郭金辉[1] 

机构地区：[1]长春工程学院土木工程学院,长春130012

出　　处：《工业建筑》2014年第9期110-113,6,共5页Industrial Construction

基　　金：国家自然科学基金项目(406721780;40911120044);吉林省教育厅"十二五"科技研究项目(120130042);吉林省抗震减灾重点实验室资助项目

摘　　要：吉林省大安市是东北典型的季冻土分布区,也是土壤盐渍化最严重的地区之一,其境内的土壤中易溶盐组分以HCO3-(CO2-3)、Na+含量较多,Cl-、SO2-4次之,还有少量的Mg2+、Ca2+、K+等。为了探究不同类型的易溶盐在冻融循环作用下对混凝土耐久性能的影响,在复合盐侵蚀与冻融循环双重因素作用下混凝土耐久性试验研究的基础上,进行混凝土的单盐-冻融循环对比试验,总结出在冻融交替作用下,硫酸盐、氯盐与碳酸氢盐对混凝土材料腐蚀破坏的特点、规律,并进一步对混凝土的盐冻破坏机理进行分析。Da’an city in Jilin province is not only frost soil region in the north-east, but also is one of the most serious region where has salinization soil .In the soil the dissolved salt component HCO 3 -（ CO2-3 ） and Na ＋content is the most, followed by Cl -and SO2-4 , and there are small amounts of Mg 2＋, Ca2＋, K＋, etc.In order to study the influence on the durability of concrete by the different soluble salts after the action of freezing -thawing cycles , separate salt and freezing-thawing cycle comparing tests of the concrete were conducted on the basis of the previous experimental study on the durability of concrete affected by double factors of the composite salts and freezing -thawing cycles.The characteristics and laws of the damage to concrete by corrosion due to sulfate , chloride and bicarbonate under the action of freezing-thawing alternation were summarized , and the mechanism of failure was analyzed further .

关 键 词：混凝土 盐冻 冻融循环 

分 类 号：TU528[建筑科学—建筑技术科学]