摘要
引气剂能够明显提高混凝土的抗冻性能,可以有效解决高原地区温差大导致的混凝土冻融破坏严重及抗冻性差的问题。然而与平原环境相比,由于高原海拔高气压低的特点,常规引气剂的性能明显受到影响。以在高原地区使用的引气剂为研究对象,综合分析了引气剂的作用机理及其在高原环境下的作用效果和应用技术。基于现有研究结果和规律,提出了引气剂在高原混凝土中的应用技术,目前研究存在的问题和可以开展研究的方向,为引气剂在高原混凝土中的推广利用提供参考。
The environment with large temperature difference in plateau area leads to serious freeze-thaw damage and poor frost resistance of concrete.The addition of air entraining agent(AEA)can improve the frost resistance of concrete,which can partially solve the above issues.However,compared with the plain environment,the performance of conventional AEA is significantly affected due to the low plateau pressure.The aim is therefore to investigate the performance of AEA in plateau concrete by comprehensively analyzing its effect,mechanism and application technology in plateau condition.Through the comprehensive analysis,the method to improve the use of AEA in plateau area,the existing problems and the direction of research was proposed to widen the application of AEA in plateau concrete.
作者
任骏
李豪
毛江鸿
张吉
刘毕润轩
薛韵秋
闫硕
REN Jun;LI Hao;MAO Jianghong;ZHANG Ji;LIU-BI Runxuan;XUE Yunqiu;YAN Shuo(College of Architecture and Planning,Yunnan University,Kunming 650500,China;College of Architecture and Environment,Sichuan University,Chengdu 610000,China)
出处
《混凝土》
CAS
北大核心
2024年第8期172-178,共7页
Concrete
基金
国家自然科学基金地区项目(52168038)
国家自然科学基金青年项目(51908526)
四川省科学技术厅区域创新合作项目(2022YFQ0048)
云南省大学生创新创业训练重点项目(202210673087,202210673019)。
关键词
引气剂
低气压
高原环境
混凝土
抗冻性
含气量
air entraining agent
low pressure
plateau environment
concrete
frost resistance
air content
