摘要
在实际服役过程中,混凝土常常处于复杂的环境中。杂散电流广泛存在于采用直流牵引供电的轨道交通系统中,因此这类工程中的混凝土、砂浆等水泥基材料往往处于杂散电流与环境因素的共同腐蚀作用下。总结了国内外关于杂散电流与软水、氯离子、硫酸根离子和冻融循环等环境因素耦合作用下水泥基材料耐久性的研究进展,以及如何提高水泥基材料的抗杂散电流性能的研究成果。在此基础上,对杂散电流与环境因素耦合作用下的水泥基材料耐久性研究前景进行了展望。
In the actual service process,concrete usually exposed to the complex environments.Stray current widely existed in the rail transit systems powered by DC traction.Therefore,cement-based materials such as concrete and mortar in the engineering usually exposed to the coupling corrosion actions of stray current and environmental factors.In this paper,the achievements of durability of cement-based materials were summarized,when the cement-based materials suffered from different corrosion environments,such as stray current with soft water,chloride ions,sulfates and freezing and thawing cycle.On this basis,prospects of durability of cement-based materials under the coupling conditions of stray current and environmental factors were also presented.
作者
王宝民
李高年
韩俊南
刘方
WANG Baomin;LI Gaonian;HAN Junnan;LIU Fang(School of Civil Engineering Dalian University of Technology,Dalian 116024,China;School of Civil Engineering,Xijing University,Xi′an 710123,China)
出处
《混凝土》
CAS
北大核心
2019年第1期8-12,共5页
Concrete
基金
国家自然科学基金(51578108
51878116)
中央高校基本科研业务费(DUT18ZD219)
关键词
杂散电流
环境因素
腐蚀作用
水泥基材料耐久性
stray current
environmental factors
corrosion action
durability of cement-based materials
