紫外线下纳米TiO2改性涂层混凝土抗碳化性能研究
Study on Carbonation Resistance of Nano-Modified TiO2 Coated Concrete Under Ultraviolet Radiation
王建有 1石鹏超 2袁群 3王大辉 3王姗姗 4曹宏亮3
作者信息
- 1. 郑州大学 水利与交通学院,河南 郑州 450001
- 2. 郑州大学 水利与交通学院,河南 郑州 450001;河南省水利科技应用中心,河南 郑州 450003
- 3. 河南省水利科技应用中心,河南 郑州 450003
- 4. 河南水利勘测设计研究有限公司,河南 郑州 450016
- 折叠
摘要
为提升涂层混凝土在紫外线照射下的抗碳化性能,通过引入不同掺量金红石型纳米TiO2对水泥基结晶涂层和聚氨酯涂层进行改性.结果表明:紫外线照射一定程度上会削弱涂层混凝土的抗碳化性能;使用纳米TiO2改性后,两种涂层混凝土在紫外线照射下的抗碳化性能均得到了不同程度的提升,随着纳米TiO2 掺量的增加,两种涂层混凝土抗碳化性能均呈现先提升后降低的趋势,其中水泥基结晶涂层中纳米TiO2最优掺量为 2%,聚氨酯涂层中纳米TiO2最优掺量为 1%～2%,紫外线照射下纳米TiO2对聚氨酯涂层混凝土抗碳化性能的提升最为明显.
Abstract
In order to improve the carbonation resistance of coated concrete under ultraviolet irradiation,the cement-based crystalline coating and polyurethane coating were modified by introducing different amounts of rutile nano-TiO2.The rapid carbonation test results show that ul-traviolet radiation will weaken the carbonation resistance of the coated concrete to a certain extent.With the increase of nano-TiO2 content,the anti-carbonation performance of the two coated concretes under ultraviolet radiation has been improved to varying degrees,and with the increase of nano-TiO2 content,the anti-carbonation performance shows a trend of first improving and then decreasing,among which the opti-mal content of nano-TiO2 in cement-based crystalline coating is 2%,the optimal content of nano-TiO2 in polyurethane coating is 1%-2%,and the anti-carbonation performance of polyurethane coating is most obvious under ultraviolet light.The results of this paper can provide en-gineering guidance for the improvement of concrete coatings in service under ultraviolet environment.
关键词
混凝土碳化/紫外线/涂层/纳米TiO2Key words
carbonation of concrete/ultraviolet rays/coating/nano-TiO2引用本文复制引用
基金项目
河南省水利科技攻关计划(2021)(2021-72)
出版年
2024
国家科技期刊平台
NSTL
万方数据