Preparation and properties of alkali-activated red mud-based artificial lightweight aggregates
文献类型：期刊论文
| 作者 | Yang, Jing1; Wang, Zhaoshan1; Luo, Hui1,2; Wang, Huiteng1; Chen, Limin1; Liu, Meng1; Tang, Ming1; He, Bao-Jie3,4 |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2024-10-25 |
| 卷号 | 449页码:12 |
| 关键词 | Artificial lightweight aggregates Red mud Solid waste Soda residue Steam curing Microstructure Mechanism |
| ISSN号 | 0950-0618 |
| DOI | 10.1016/j.conbuildmat.2024.138304 |
| 通讯作者 | Luo, Hui(water@njfu.edu.cn) ; He, Bao-Jie(baojie.he@cqu.edu.cn) |
| 英文摘要 | Red mud (RM) is a highly alkaline waste of industrial processes, and its prolonged storage has resulted in substantial safety and environmental challenges. Therefore, the comprehensive utilization and harmless treatment of RM have become an urgent global challenge. This research prepared red mud-based artificial lightweight aggregate (RM-LWA) by combining RM with multiple solid wastes (red brick, soda residue, and mineral powder). Various techniques (XRD, SEM, EDS, and FTIR) were employed to analyze the microstructure and mineral composition of both raw materials and RM-LWA. Additionally, the impact of various curing conditions and mixing water on the physical characteristics, freeze-thaw resistance, and heavy metal leaching characteristics of RM-LWA were examined. The findings revealed that RM-LWA achieved its highest cylinder crush strength, softening coefficient, apparent density, and bulk density (9.5 MPa, 0.96, 1022 kg/m(3), and 673 kg/m(3), respectively) when prepared with a sodium silicate solution (silica modulus of 1.0, SS 1.0) and cured at 90 degrees C (steam temperature) for 24 h. The water absorption rate after 1 h was 11.5 %, and the void ratio was 34.4 %. Microstructural analysis revealed that the RM-LWA hydration products mainly comprised calcite and C-S-H, forming a dense, cohesive gel structure that effectively covered the particle surfaces and improved binding effect. Under standard curing conditions, RM-LWA produced with SS 1.0 demonstrated superior freeze-thaw resistance with a complete mass loss of 100 % after 20 freeze-thaw cycles. Heavy metal leaching characteristic tests demonstrated that the Cr, As, Pb, Ni, and Cu leaching concentrations in the six groups of RM-LWA all complied with the prescribed limits for the release of non-hazardous substances into the environment according to the standards. |
| WOS关键词 | RICE HUSK ; MICROSTRUCTURE ; WASTE ; ASH |
| 资助项目 | National Natural Science Foundation of China[52108322] ; Xinjiang Biomass Solid Waste Resources Technology and Engineering Center of China[KSUGCZX2022] ; Lianyungang Key Research and Development Plan (Social Development) project of China[SF2130] ; Lianyungang Key Research and Development Plan (Industrial Outlook and Key Technology Core) project of China[CG2207] ; Postgraduate Research & Practice Innovation Program of Jiangsu Province[SJCX23_1814] ; Postgraduate Research & Practice Innovation Program of Jiangsu Province[SJCX23_1816] ; Natural Science Foundation of the Jiangsu Higher Education Institutions of China[22KJB560001] |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001317077700001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/199010]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Luo, Hui; He, Bao-Jie |
| 作者单位 | 1.Jiangsu Ocean Univ, Sch Civil & Ocean Engn, Lianyungang 222005, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.Univ New South Wales, Fac Built Environm, Sydney, NSW 2052, Australia 4.Chongqing Univ, Ctr Climate Resilient & Low Carbon Cities, Sch Architecture & Urban Planning, Chongqing 400045, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Jing,Wang, Zhaoshan,Luo, Hui,et al. Preparation and properties of alkali-activated red mud-based artificial lightweight aggregates[J]. CONSTRUCTION AND BUILDING MATERIALS,2024,449:12. |
| APA | Yang, Jing.,Wang, Zhaoshan.,Luo, Hui.,Wang, Huiteng.,Chen, Limin.,...&He, Bao-Jie.(2024).Preparation and properties of alkali-activated red mud-based artificial lightweight aggregates.CONSTRUCTION AND BUILDING MATERIALS,449,12. |
| MLA | Yang, Jing,et al."Preparation and properties of alkali-activated red mud-based artificial lightweight aggregates".CONSTRUCTION AND BUILDING MATERIALS 449(2024):12. |
入库方式： OAI收割
来源：海洋研究所
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