Manufacturing and performance of environment-friendly lightweight aggregates with core-shell structure
文献类型：期刊论文
| 作者 | Shang, Xiao-yu2; Li, Jiang-shan1 |
| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2020-12-10 |
| 卷号 | 276期号:-页码:11 |
| 关键词 | Artificial LWAs Fly ash Sodium alginate Encapsulation parameters Properties |
| ISSN号 | 0959-6526 |
| DOI | 10.1016/j.jclepro.2020.123157 |
| 英文摘要 | The production of lightweight aggregates (LWAs) involves much energy consumption and emission of pollution during the sintering process. The increasing worldwide demand for functional concrete for use in modern construction has promoted this negative trend to a more serious level. This study reports an artificial lightweight capsule aggregates (CAs) based on an encapsulation technology from the viewpoint of green manufacturing. The novel CAs are composed of a fly ash-cement inorganic shell and sodium alginate organic core. A series of experiments were conducted to study the influences of the rotation rate, duration time, curing conditions and surface conditions for sodium alginate beads (SAB) on the physical and mechanical characteristics of the CAs. The results indicate that CAs with a wet density of 1340 kg/m(3) and corresponding crush strength of 2.46 MPa can be achieved. The CAs density can be further decreased by a third via sodium alginate dehydration. CAs with optimized performance can be synthesized by using a rotation rate of 150 rpm, duration time of 30 s and C/A ratio of 2.0. A low rotation rate and high duration time have a negative effect on the CAs characteristics. A saturated surface dry (SSD) condition process for the SAB was found to greatly contribute to the optimization of CAs density. Findings from this study can provide a novel and viable way to reuse industrial wastes and biomass resources to manufacture core-shell structured LWAs with stable and adjustable performance. These artificial LWAs have great application potential in the preparation of the advanced lightweight concrete. (C) 2020 Elsevier Ltd. All rights reserved. |
| 资助项目 | National Natural Science Foundation of China[51708091] |
| WOS研究方向 | Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000579500800053 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25035]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Northeast Elect Power Univ, Sch Civil Engn & Architecture, Jilin 132012, Jilin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shang, Xiao-yu,Li, Jiang-shan. Manufacturing and performance of environment-friendly lightweight aggregates with core-shell structure[J]. JOURNAL OF CLEANER PRODUCTION,2020,276(-):11. |
| APA | Shang, Xiao-yu,&Li, Jiang-shan.(2020).Manufacturing and performance of environment-friendly lightweight aggregates with core-shell structure.JOURNAL OF CLEANER PRODUCTION,276(-),11. |
| MLA | Shang, Xiao-yu,et al."Manufacturing and performance of environment-friendly lightweight aggregates with core-shell structure".JOURNAL OF CLEANER PRODUCTION 276.-(2020):11. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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