[1]金伟良,吴航通,许晨.纳米氧化铝在混凝土中的电迁移效果[J].东南大学学报(自然科学版),2018,48(3):537-542.[doi:10.3969/j.issn.1001-0505.2018.03.023]
 Jin Weiliang,Wu Hangtong,Xu Chen.Electro-migration of nanoalumina in concrete[J].Journal of Southeast University (Natural Science Edition),2018,48(3):537-542.[doi:10.3969/j.issn.1001-0505.2018.03.023]
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纳米氧化铝在混凝土中的电迁移效果()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
48
期数:
2018年第3期
页码:
537-542
栏目:
土木工程
出版日期:
2018-05-20

文章信息/Info

Title:
Electro-migration of nanoalumina in concrete
作者:
金伟良吴航通许晨
浙江大学结构工程研究所, 杭州 310058
Author(s):
Jin Weiliang Wu Hangtong Xu Chen
Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China
关键词:
电迁移 混凝土 纳米氧化铝 扫描电镜 压汞 黏结强度
Keywords:
electro-migration concrete nanoalumina scanning electron microscopy(SEM) intrusion porosimetry(MIP) bond strength
分类号:
TU375
DOI:
10.3969/j.issn.1001-0505.2018.03.023
摘要:
为了探究纳米氧化铝在外加电场作用下迁移进入混凝土的效果,选用纳米氧化铝分散液作为阳极电解液,对混凝土试件进行通电处理.电迁移完成后采用扫描电镜、能谱分析、压汞法以及拉拔试验,分析了混凝土材料的微观结构和力学性能.结果表明,电迁移处理后混凝土内部铝元素含量增加,电镜扫描能够观察到纳米氧化铝颗粒.混凝土孔隙率减少,孔隙分布明显改善,钢筋混凝土之间的黏结强度得到加强.纳米氧化铝能够有效迁移至混凝土内部,改善混凝土耐久性能,迁移效果随电流密度和通电时间的增大而提升.
Abstract:
To investigate the effect of nanoalumina(NA)transportation into concrete under the external electric field, an external electric current was applied in reinforced concrete by using NA suspension as the anolyte. The microstructure and the mechanical property of concrete were researched by scanning electron microscopy(SEM), spectrum analysis, mercury intrusion porosimetry(MIP)and pull-out tests after electro-migration treatment. The results show that the content of aluminum in concrete increases and nanoparticles can be observed by electron microscopy after electro-migration. The concrete porosity decreases, and the pore distribution is optimized. The bond strength of reinforced concrete is improved. Nanoalumina can be effectively migrated into concrete to improve the durability performance of concrete. The migrating effect increases with the increases of the current density and the electric time.

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备注/Memo

备注/Memo:
收稿日期: 2017-10-20.
作者简介: 金伟良(1961—),男,教授,博士生导师,jinwl@zju.edu.cn.
基金项目: 国家自然科学基金资助项目(51578490)、浙江省自然科学基金资助项目(LQ14E080010)、浙江省质量技术监督系统科研计划资助项目(20130243,20140229,20160137)、杭州市重大科技创新专项资助项目(20142011A41).
引用本文: 金伟良,吴航通,许晨.纳米氧化铝在混凝土中的电迁移效果[J].东南大学学报(自然科学版),2018,48(3):537-542. DOI:10.3969/j.issn.1001-0505.2018.03.023.
更新日期/Last Update: 2018-05-20