摘要
为解决西北地区输变电工程对于混凝土材料耐久性和导电性的特殊需求,以硅酸钠和膨润土作为囊芯、乙基纤维素作为囊壁,物理法合成微胶囊。外掺氧化后石墨烯充当导电介质,制备混凝土复合材料标准试件。随后对试样进行硫酸盐浸泡和干湿循环试验,分析了硫酸盐侵蚀后混凝土的表观特征、质量损失率和力学性能。结果表明:微胶囊的加入显著提高了抗硫酸盐性和自愈性,含有乙基纤维素包封的胶囊混凝土表现出良好的抗硫酸盐性和自愈性。
In order to solve the special needs for the durability and resistance of concrete materials in power transmission projects in Northwest China.Using sodium silicate and bentonite as capsule core and ethyl cellulose as capsule wall,microcapsules were synthesized by physical method.Standard specimens of cement-based materials were prepared by adding graphene oxide as conductive medium.Samples were subjected to sulfate immersion and dry-wet cycle tests.After sulfate attack,the apparent characteristics,mass loss rate and mechanical properties of concrete were analyzed.The test results show that the addition of microcapsules significantly improves sulfate resistance and self-healing properties.Capsule concrete containing ethyl cellulose encapsulation shows good sulfate resistance and self-healing performance.
作者
鄂天龙
张四江
景明明
王生贵
张子堂
王泉
张富平
程志和
王名远
E Tian-long;ZHANG Si-jiang;JING Ming-ming;WANG Sheng-gui;ZHANG Zi-tang;WANG Quan;ZHANG Fu-ping;CHENG Zhi-he;WANG Ming-yuan(State Grid Gansu Electric Power Company Construction Branch,Lanzhou 730000,China;Chongqing Research Institute of HIT,Chongqing 401120,China)
出处
《科学技术与工程》
北大核心
2023年第36期15580-15587,共8页
Science Technology and Engineering
基金
国家自然科学基金(42101125)。
关键词
自修复混凝土
微胶囊
硫酸盐侵蚀
质量损伤率
力学性能
self-healing concrete
microcapsule
sulfate attack
mass loss rate
mechanical performance
