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Effect of electrolytic manganese residue at different calcination temperatures on hydration characteristics and microstructure of cement mortar

文献类型：期刊论文

作者Fu, Yong2; Qiao, Hongxia2,3; Feng, Qiong2,3; Chen, Kefan1; Li, Yanqi2; Jia, Zhenyu2; Xue, Cuizhen2,3; Hakuzweyezu, Theogene4
刊名MATERIALS TODAY COMMUNICATIONS
出版日期2024-08-01
卷号40页码:14
关键词High-temperature calcination Electrolytic manganese residue Pore structure Reaction kinetics Volcanic ash activity
DOI10.1016/j.mtcomm.2024.110196
英文摘要This study investigates the hydration mechanism and microstructure of electrolytic manganese residue (EMR) cement mortar at different calcination temperatures. The results indicate that EMR cement mortar, when calcined at low temperatures (200 and 400 degrees C), demonstrates improved mechanical properties in the early stages. However, higher sulfate content results in poor setting time and reduced volume stability. Concurrently, there is a notable reduction in the number of gel pores and a considerable increase in capillary pores, leading to diminished mechanical properties in the later stages. Although EMR cement mortar calcined at 600 degrees C exhibits superior mechanical properties, its hydration kinetics are poor. The primary reason for this is that the finer particles of EMR primarily serve a filling role, with no hydration reaction occurring. However, when calcined at 800 degrees C and 1000 degrees C, the high-temperature decomposition of dihydrate gypsum forms activated calcium oxide, thereby enhancing pozzolanic activity. Simultaneously, the smaller EMR particles contribute to filling and nucleation, refining the pore structure and enhancing the mechanical properties. Additionally, the incorporation of EMR in cement mortar effectively mitigates heavy metals and achieves the goal of harmlessness.
资助项目National Natural Science Foundation of China[52178216] ; Key Projects of Chongqing Science and Technology Bureau[cstc2021jscx-jbgs0029] ; Gansu Provincial Science and Technology Programme Grant[23JRRA799] ; Gansu Provincial Science and Technology Programme Grant[23JRRA813]
WOS研究方向Materials Science
语种英语
WOS记录号WOS:001316484200001
出版者ELSEVIER
源URL[http://119.78.100.198/handle/2S6PX9GI/42636]  
专题中科院武汉岩土力学所
通讯作者Qiao, Hongxia
作者单位1.Chongqing Zonjo Reclaimed Resources Dev Co Ltd, Chongqing 401122, Peoples R China
2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R China
3.Gansu Adv Civil Engn Mat Engn Res Ctr, Lanzhou 730050, Peoples R China
4.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China
推荐引用方式
GB/T 7714		 Fu, Yong,Qiao, Hongxia,Feng, Qiong,et al. Effect of electrolytic manganese residue at different calcination temperatures on hydration characteristics and microstructure of cement mortar[J]. MATERIALS TODAY COMMUNICATIONS,2024,40:14.
APA Fu, Yong.,Qiao, Hongxia.,Feng, Qiong.,Chen, Kefan.,Li, Yanqi.,...&Hakuzweyezu, Theogene.(2024).Effect of electrolytic manganese residue at different calcination temperatures on hydration characteristics and microstructure of cement mortar.MATERIALS TODAY COMMUNICATIONS,40,14.
MLA Fu, Yong,et al."Effect of electrolytic manganese residue at different calcination temperatures on hydration characteristics and microstructure of cement mortar".MATERIALS TODAY COMMUNICATIONS 40(2024):14.

入库方式： OAI收割

来源：武汉岩土力学研究所

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