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Preparation of one-part geopolymeric precursors using vanadium tailing by thermal activation |
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| Authors: | Yongpeng Luo Shenxu Bao Yimin Zhang |
| Affiliation: | 1. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan, PR China
School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, PR China;2. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan, PR China;3. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan, PR China School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, PR China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan, PR China Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources, Wuhan University of Science and Technology, Wuhan, PR China |
| Abstract: | The main purpose of this study is to develop a user-friendly one-part geopolymer using vanadium tailing (VT). Geopolymeric precursor consists of activated VT and metakaolin that can react directly with water to form geopolymers. The roasting temperature plays an important role in the VT activation, which affects the compressive strength of the final geopolymer. The geopolymer with accepted compressive strength, that is 29.0 MPa after 7 days curing in ambient condition, can be prepared using VT after thermal activation at appropriate temperature (400-600°C). As the roasting temperature is increased to 700°C, the VT is molten and sintered and the ability of providing alkaline and Si4+ is drastically weakened, which results in a poor compressive strength geopolymer. |
| Keywords: | akali activation geopolymers mechanical properties thermal analysis |