Synthesis of ferronickel slag-based geopolymers |
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| Authors: | Ioannis Maragkos Ioanna P Giannopoulou Dimitrios Panias |
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| Affiliation: | 1. Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD 4350, Australia;2. College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China;3. School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China;4. Key Laboratory for Ecology and Pollution Control of Coastal Wetlands, Yancheng Institute of Technology, Yancheng 224051, China;1. School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, China;2. College of Hydraulic and Civil Engineering, Shandong Agricultural University, Tai’an, Shandong 271018, China;1. High-Tech Construction Materials Center, Korea Conformity Laboratories, Seoul, South Korea;2. Department of Civil and Environmental Engineering, Chung-Ang University, 84 Heukseokro, Dongjakgu, Seoul 156-756, South Korea;1. Faculty of Materials Science and Engineering, Nanjing University of Technology, Nanjing, Jiangsu 210009, China;2. Faculty of Engineering and Surveying, University of Southern Queensland, Toowoomba, QLD 4350, Australia;1. School of Materials Science and Engineering, Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China;2. Centre for Future Materials, University of Southern Queensland, Toowoomba, QLD 4350, Australia;3. Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, College of Civil Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | This paper deals with the synthesis of geopolymers utilizing ferronickel slag as raw material. The utilized slag is produced in the Greek plant LARCO during the pyrometallurgical treatment of laterites for the production of ferronickel, specifically at the step of the reductive smelting in electric arc furnaces. The performed work includes the optimization of the slag-based geopolymeric system through the study of the effect of the synthesis parameters on the mechanical properties of the produced materials. The structure of geopolymers was determined with X-ray diffractometry (XRD), Fourier-transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The obtained results showed that the ferronickel slag is an excellent raw material for the production of inorganic polymers using the geopolymerization technology. The materials produced under the optimum synthesis conditions were compact and rigid and presented high compressive strength (118 MPa), as well as extremely low water absorption (0.7–0.8%). |
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