| Evolution of surface hardness of concrete under sulfate attack | |
Ouyang WY; Chen JK ; Jiang MQ(蒋敏强); Chen, JK (reprint author), Ningbo Univ, Fac Mech Engn & Mech, Ningbo 315211, Zhejiang, Peoples R China.
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| 发表期刊 | Construction and Building Materials
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| 2014-02-28 | |
| 卷号 | 53页码:419-424 |
| ISSN | 0950-0618 |
| 摘要 | Under sulfate attack, the erosion damage is not uniformly distributed in concrete, but firstly takes place at the surface since the sulfate radical ions diffuse from surface to inner of the material. In order to investigate the damage degree, the variation of surface hardness of concrete was investigated in this study. The corrosion experiments continued about 330 days, and the evolution of surface hardness of concrete samples was detected by rebound method. Meanwhile, SEM observation and XRD test for concrete samples were also carried out. It was found that exist a competition mechanism of enhancement effect and weakening effect, because the surface hardness of concrete monotone increases at the initial stage. SEM observation and XRD test indicated that both enhancement and weakening effect are all caused by delayed ettringite and gypsum. The enhancement mechanism is produced by the filling effect of delayed ettringite and gypsum, and the weakening mechanism is induced by damage evolution due to their expansion force. Based on the experimental results, a new method was suggested to express the damage degree. The analysis results indicated that the water-to-cement ratio of concrete and the concentration of sulfate solution strongly affect the attenuation of the surface hardness. (C) 2013 Elsevier Ltd. All rights reserved. |
| 关键词 | Dielectrophoresis Electroosmosis Joule Heating Microfluidics Reservoir |
| 学科领域 | Construction & Building Technology ; Engineering ; Materials Science |
| URL | 查看原文 |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000333506700044 |
| 项目资助者 | The authors would like to acknowledge the financial support by the National Natural Science Foundation of China (NSFC # 10932001, #51079069), the Key Research Program of Society Development of Ningbo (2013C51007), the Key Research Program of Ministry of Education of China (No. 20103305110001), and K.C. Wong Magna Fund in Ningbo University. |
| 课题组名称 | LNM冲击动力学与新型材料力学性能 |
| 论文分区 | 一类 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/48775 |
| 专题 | 非线性力学国家重点实验室 |
| 通讯作者 | Chen, JK (reprint author), Ningbo Univ, Fac Mech Engn & Mech, Ningbo 315211, Zhejiang, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Ouyang WY,Chen JK,Jiang MQ,et al. Evolution of surface hardness of concrete under sulfate attack[J]. Construction and Building Materials,2014,53:419-424. |
| APA | Ouyang WY,Chen JK,Jiang MQ,&Chen, JK .(2014).Evolution of surface hardness of concrete under sulfate attack.Construction and Building Materials,53,419-424. |
| MLA | Ouyang WY,et al."Evolution of surface hardness of concrete under sulfate attack".Construction and Building Materials 53(2014):419-424. |
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