Synergistic effects of waste coral powder and metakaolin in cement pastes: Hydration, pore structure, rheology, and strength
文献类型：期刊论文
| 作者 | Qin, Qinglong2,3; Meng, Qingshan1; Gan, Manguang1; Zhang, Jiwang4; Yi, Panpan1 |
| 刊名 | JOURNAL OF BUILDING ENGINEERING
 |
| 出版日期 | 2024-11-15 |
| 卷号 | 97页码:15 |
| 关键词 | Coral powder Metakaolin Hydration Rheology Mechanical properties |
| DOI | 10.1016/j.jobe.2024.111001 |
| 英文摘要 | Coral reefs are abundant in waste coral powder, and how to utilize coral powder efficiently to construct far-sea projects has become a major focus of research and engineering field, which is conducive to the development of green economy. However, existing research lacks a comprehensive and systematic investigation of the cement-coral powder-metakaolin ternary system. In this study, the hydration and rheological behavior, micromechanical and mechanical properties, and pore structure evolution of the ternary system are systematically investigated to uncover the synergistic mechanism between metakaolin and coral powder. The results indicated that, based on hydration, rheology, and mechanical properties, the recommended proportions of cement, coral powder, and metakaolin are 75 %, 10 %, and 15 %, respectively. The combination of coral powder and metakaolin effectively promotes hydration. Furthermore, it accelerates the aluminate reaction, resulting in a stronger aluminate exothermic peak immediately. In addition, metakaolin reacts with coral powder to form carboaluminate, activating the activity of the coral powder, which in turn improves the mechanical properties and pore structure of the ternary system. Moreover, metakaolin undergoes a pozzolanic reaction with calcium hydroxide, which contributes to optimizing the pore structure of the ternary system and enhancing its mechanical properties. Additionally, coral powder promotes the conversion of monosulfate to carboaluminate while inhibiting the transformation of ettringite into monosulfate. The Herschel-Bulkley model accurately simulates the dynamic rheological behavior of the ternary system. This study is highly significant and practically valuable for transforming waste coral powder into a supplementary cementitious material for the construction of the far-sea projects, providing a scientific basis for future related studies. |
| 资助项目 | National Natural Science Foundation of China[41877267] ; Priority Research Program of the Chinese Academy of Science[XDA13010201] |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001355628800001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/43116]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Meng, Qingshan |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Hong Kong Polytech Univ, Res Ctr Resources Engn Carbon Neutral, Hong Kong 999077, Peoples R China 3.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong 999077, Peoples R China 4.Guilin Univ Technol, Sch Civil Engn, Guilin 541004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qin, Qinglong,Meng, Qingshan,Gan, Manguang,et al. Synergistic effects of waste coral powder and metakaolin in cement pastes: Hydration, pore structure, rheology, and strength[J]. JOURNAL OF BUILDING ENGINEERING,2024,97:15. |
| APA | Qin, Qinglong,Meng, Qingshan,Gan, Manguang,Zhang, Jiwang,&Yi, Panpan.(2024).Synergistic effects of waste coral powder and metakaolin in cement pastes: Hydration, pore structure, rheology, and strength.JOURNAL OF BUILDING ENGINEERING,97,15. |
| MLA | Qin, Qinglong,et al."Synergistic effects of waste coral powder and metakaolin in cement pastes: Hydration, pore structure, rheology, and strength".JOURNAL OF BUILDING ENGINEERING 97(2024):15. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。