Effect of Air Entrainment on the Mechanical Properties, Chloride Migration, and Microstructure of Ordinary Concrete and Fly Ash Concrete
文献类型：期刊论文
| 作者 | Zhang, Peng1 ; Li, Dan1; Qiao, Yun1; Zhang, Sulei1; Sun, Congtao2; Zhao, Tiejun1
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| 刊名 | JOURNAL OF MATERIALS IN CIVIL ENGINEERING
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 30期号:10页码:9 |
| 关键词 | Air entrainment Fly ash concrete Compressive strength Chloride migration Pore structure |
| ISSN号 | 0899-1561 |
| DOI | 10.1061/(ASCE)MT.1943-5533.0002456 |
| 通讯作者 | Zhang, Peng(peng.zhang@qut.edu.cn) |
| 英文摘要 | Air-entrained concrete has been extensively used in bridges and water conservancy projects in cold regions. The objective of this study was to investigate the effect of air entrainment on the mechanical properties, chloride migration, and microstructure of ordinary concrete and fly ash concrete. Twelve concrete mixtures were prepared with two water-to-binder ratios (0.53 and 0.35), three levels of air content (no air entrainment; moderate air entrainment, with 4-5% air content; and high air entrainment, with 7-10% air content), and two levels of fly ash (no fly ash and 30% replacement of cement). The results indicated that, compared with ordinary concrete, the addition of an air-entraining agent (AEA) to fly ash concrete resulted in a greater decrease in compressive strength. Care must be taken when introducing artificial air bubbles into fly ash concrete because the bubbles will affect the mechanical properties. With proper air entrainment (air content of 4-5%), stable, closed, and well-distributed air bubbles are introduced into concrete so that the connectivity of the pore system is interrupted and chloride migration is consequently minimized. However, if the concrete contains a large amount of entrained air, a substantial amount of large and detrimental pores is introduced, causing air bubbles to overlap and merge, as well as causing additional chloride migration. This effect is more prominent in fly ash concrete. |
| 资助项目 | National Natural Science Foundation of China[51420105015] ; National Natural Science Foundation of China[U1706222] ; National Natural Science Foundation of China[51778309] ; 973 Program[2015CB655100] ; Natural Science Foundation of Shandong Province[ZR2018JL018] ; Natural Science Foundation of Shandong Province[ZR2017ZC073] ; 111 Project |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000440377200028 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/159725]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Zhang, Peng |
| 作者单位 | 1.Qingdao Univ Technol, Dept Civil Engn, Fushun Rd 11, Qingdao 266033, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Peng,Li, Dan,Qiao, Yun,et al. Effect of Air Entrainment on the Mechanical Properties, Chloride Migration, and Microstructure of Ordinary Concrete and Fly Ash Concrete[J]. JOURNAL OF MATERIALS IN CIVIL ENGINEERING,2018,30(10):9. |
| APA | Zhang, Peng,Li, Dan,Qiao, Yun,Zhang, Sulei,Sun, Congtao,&Zhao, Tiejun.(2018).Effect of Air Entrainment on the Mechanical Properties, Chloride Migration, and Microstructure of Ordinary Concrete and Fly Ash Concrete.JOURNAL OF MATERIALS IN CIVIL ENGINEERING,30(10),9. |
| MLA | Zhang, Peng,et al."Effect of Air Entrainment on the Mechanical Properties, Chloride Migration, and Microstructure of Ordinary Concrete and Fly Ash Concrete".JOURNAL OF MATERIALS IN CIVIL ENGINEERING 30.10(2018):9. |
入库方式： OAI收割
来源：海洋研究所
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