甲酸钾除冰液作用下机场道面混凝土单面冻融试验研究  

Experimental Study on Single-side Freeze-thaw of Airport Pavement Concrete Under the Action of Potassium Formate Deicing Liquid

作　　者：卿汶松 李玉香[1] 邓浩 郑召 李琛 QING Wen-song;LI Yu-xiang;DENG Hao;ZHENG Zhao;LI Chen(Southwest University of Science and Technology,Material Science and Engineering School,Mianyang 621010,China;Southwest University of Science and Technology,School of Civil Engineering and Architecture,Mianyang 621010,China)

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《混凝土与水泥制品》2023年第3期1-5,9,共6页China Concrete and Cement Products

摘　　要：采用单面冻融法,研究了不同甲酸钾除冰液浓度作用下机场道面混凝土冻融前后的性能,并对机场道面混凝土表面剥落物质量、介质吸入率、超声波相对动弹性模量和孔结构进行了测定。结果表明:在除冰液作用下,混凝土的孔隙水饱和度显著提升,使混凝土冻融后的破坏程度加剧;在除冰液浓度作用下,混凝土冻融时的表面剥落物质量和介质吸入率与冻融介质的性质及混凝土孔隙水饱和度有关,大小顺序皆为:6%>12%>24%>0,超声波相对动弹性模量与混凝土内部结构复杂程度有关,除冰液浓度对超声波相对动弹性模量下降影响大小顺序为:24%>6%>12%>0;随除冰液浓度(6%、12%、24%)增加,单面冻融后混凝土的平均孔径呈先增大后减小的趋势。The performance of airport pavement concrete before and after freeze-thaw under different concentration of potassium formate deicing liquid was studied by single-side freeze-thaw method.The results show that under the action of deicing liquid,the pore water saturation of concrete is significantly increased,which aggravates the damage of concrete after freeze-thaw.Under the action of each deicing liquid concentration,the surface peeling mass and medium suction rate of concrete during freeze-thaw are related to the properties of freeze-thaw medium and the saturation of concrete pore water.The order of magnitude is:6%>12%>24%>0.The relative dynamic elastic modulus of ultrasonic wave is related to the complexity of concrete internal structure.The order of influence of deicing liquid concentration on the decline of ultrasonic relative dynamic elastic modulus is:24%>6%>12%>0.With the increase of deicing liquid concentration(6%,12%,24%),the average pore diameter of concrete after single-side freeze-thaw first increases and then decreases.

关 键 词：机场道面混凝土 甲酸钾除冰液 单面冻融 冻融破坏 孔结构 

分 类 号：TU528.042[建筑科学—建筑技术科学]