Knowledge Management System Of Institute of Oceanology, Chinese Academy of Sciences
| Effect of Air Entrainment on the Mechanical Properties, Chloride Migration, and Microstructure of Ordinary Concrete and Fly Ash Concrete | |
Zhang, Peng1 ; Li, Dan1; Qiao, Yun1; Zhang, Sulei1; Sun, Congtao2; Zhao, Tiejun1
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| 2018-10-01 | |
| Source Publication | JOURNAL OF MATERIALS IN CIVIL ENGINEERING
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| ISSN | 0899-1561 |
| Volume | 30Issue:10Pages:9 |
| Corresponding Author | Zhang, Peng(peng.zhang@qut.edu.cn) |
| Abstract | 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. |
| Keyword | Air entrainment Fly ash concrete Compressive strength Chloride migration Pore structure |
| DOI | 10.1061/(ASCE)MT.1943-5533.0002456 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Construction & Building Technology ; Engineering ; Materials Science |
| WOS Subject | Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000440377200028 |
| Publisher | ASCE-AMER SOC CIVIL ENGINEERS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/159726 |
| Collection | 中国科学院海洋研究所 |
| Corresponding Author | Zhang, Peng |
| Affiliation | 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 |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Effect of Air Entrai（3995KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | Application Full Text | |
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