摘要
针对我国机场水泥混凝土道面盐冻破坏现象,采用混凝土单面浸入冻融循环试验,对混凝土在不同浓度醋酸钾除冰液下的剥落量进行统计,得出在中低浓度醋酸钾溶液中混凝土发生的盐冻破坏最严重。通过对醋酸钾溶液结冰特性和混凝土吸入溶液量测定得出,醋酸钾溶液浓度越高,混凝土吸入的溶液量越大,吸入速率越快,但同时也降低了溶液的结冰体积膨胀率,增加了冰冻所需要的时间。混凝土溶液吸入量、吸入速率和溶液结冰体积膨胀率这几个因素共同导致中低浓度的溶液发生最严重的盐冻破坏。
Aiming at the salt freezing damage this paper carried out the statistical analysis phenomenon of the airport cement concrete road surface in China, of the concrete scaling mass of different concentrations potassium acetate deicing fluid by the one side immersion freeze-thaw cycle test. Results showed that the salt freezing damage of concrete in low concentration of potassium acetate solution was potassium acetate solution freezing behavior and concrete solution absorption, the most serious. By exploring of it determined that the higher con- centration of potassium acetate, the larger solution of concrete inhaling and the faster the suction rate. It also proved that the lower freezing and expansion rate made the freezing time longer. The most severe salt freezing damage occurred in the low concentration solution due to the concrete solution suction, suction rate and solution freezing expansion rate.
出处
《华东交通大学学报》
2016年第5期1-6,共6页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(51278364)
民航局重大专项课题(MHRD20130109)
关键词
机场道面混凝土
盐冻破坏
醋酸钾除冰液
剥落量
机理分析
airport pavement concrete
salt freezing damage
potassium acetate deicing fluid
scaled mass
mechanism analysis
