室外自然变负温下混凝土早期抗冻性及耐久性试验研究  

EXPERIMENTAL STUDY OF EARLY FROST RESISTANCE AND DURABILITY OF CONCRETE AT OUTDOOR NATURAL NEGATIVE TEMPERATURE

作　　者：张美香[1] 包文忠[2] 殷会玲 张茂亮 崔寅亮 杨久俊[1] 罗忠涛[1] ZHANG Meixiang;BAO Wenzhong;YIN Huiling;ZHANG Maoliang;CUI Yinliang;YANG Jiujun;LUO Zhongtao(School of Materials Science and Engi., Zhengzhou Univ., Zhengzhou 450001, China;Xinjiang Tianshan Cement Co., Ltd., Wulumuqi 830013, China;Henan Building Materials Research and Design Institute Co., Ltd., Zhengzhou 450002, China)

机构地区：[1]郑州大学材料科学与工程学院,郑州450001 [2]新疆天山水泥股份有限公司,乌鲁木齐830013 [3]河南建筑材料研究设计院有限责任公司,郑州450002

出　　处：《低温建筑技术》2018年第12期1-3,7,共4页Low Temperature Architecture Technology

基　　金：新疆自治区高层次人才引进工程;长江科学院开放研究基金项目资助(CKWV2018483/KY)

摘　　要：研究了不同养护工艺对新疆地区冬季室外自然变负温下混凝土早期抗冻性及耐久性的影响。结果表明,室外自然变负温下(平均气温达到-15℃),添加复合抗冻剂的混凝土强度可保持稳定增长,同龄期下强度远高于未加复合抗冻剂的空白试件,并且随着龄期延长此优势更加明显,强度保留率明显提高。受冻前覆膜养护对提高早期抗冻性效果良好,覆膜养护有利于局部环境的温度及湿度保持恒定。The effects of different curing techniques on the early frost resistance and durability of concrete in winter in Xinjiang were studied. The results show that the strength of concrete with composite anti-freezing agent can keep stable growth under outdoor natural negative temperature (average temperature -15℃), and the strength of concrete with composite anti-freezing agent at the same age is much higher than that of blank specimens without composite anti-freezing agent, and with the extension of age, this advantage is more obvious, and the strength retention rate is obviously improved. Film curing has a good effect on improving the early frost resistance, film mulching maintenance is beneficial to keep the temperature and humidity of the local environment constant.

关 键 词：自然变负温 混凝土 抗冻性 耐久性 

分 类 号：TU528.1[建筑科学—建筑技术科学]