Abstract
Geopolymers are inorganic aluminosilicate polymers which have been synthesized from pure sources and more recently, from industrial byproducts. In this study, the industrial by-products, coal gangue, fly ash and red mud were used to synthesize geopolymers at low and elevated temperatures. NaOH, which is often used to raise the pH of the mixture, has been partly replaced using red mud. The strength characteristics of geopolymers synthesized using binary mixtures of coal gangue and red mud as well as ternary mixtures of coal gangue, fly ash and red mud were examined. The compressive strength of the end products was determined using unconfined compression tests. The textural and morphological properties of the end products were also studied. The results reveal the influences of temperature and Si/Al and Na/Al ratios of the raw materials in the geopolymerization reactions and the subsequent development of strength, textural and morphological characteristics. The binary mixtures of coal gangue and red mud showed an increase in strength with curing temperature while the ternary mixtures of coal gangue, fly ash and red mud developed higher strength at lower curing temperatures.
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References
Provis JL, Lukey GC, Van Deventer JSJ (2005) Do geopolymers actually contain nanocrystalline zeolites? a reexamination of existing results. Chem Mater 17(12):3075–3085
Selmani S, Sdiri A, Bouaziz S, Joussein E, Rossignol S (2017) Effects of metakaolin addition on geopolymer prepared from natural kaolinitic clay. Appl Clay Sci 146:457–467
Xu H, Van Deventer JSJ (2000) The geopolymerisation of alumino-silicate minerals. Int J Miner Process 59(3):247–266
Badanoiu AI, Al Saadi THA, Stoleriu S, Voicu G (2015) Preparation and characterization of foamed geopolymers from waste glass and red mud. Constr Build Mater 84:284–293
Bashar II, Alengaram UJ, Jumaat MZ, Islam A (2016) Development of sustainable geopolymer mortar using industrial waste materials. Mater Today: Proc 3(2):125–129
Zhang M, Zhao M, Zhang G, Mann D, Lumsden K, Tao M (2016) Durability of red mud-fly ash based geopolymer and leaching behavior of heavy metals in sulfuric acid solutions and deionized water. Constr Build Mater 124:373–382
Toniolo N, Boccaccini AR (2017) Fly ash-based geopolymers containing added silicate waste. A review. Ceram Int 43:14545–14551
Koshy N, Singh DN (2016) Textural alterations in coal fly ash due to alkali activation. J Mater Civ Eng 28(11):04016126
Jabłońska B, Kityk AV, Busch M, Huber P (2017) The structural and surface properties of natural and modified coal gangue. J Environ Manag 190:80–90
Wu H, Wen Q, Hu L, Gong M, Tang Z (2017) Feasibility study on the application of coal gangue as landfill liner material. Waste Manag 63:161–171
Geng J, Zhou M, Zhang T, Wang W, Wang T, Zhou X, Wang X, Hou H (2017) Preparation of blended geopolymer from red mud and coal gangue with mechanical co-grinding preactivation. Mater Struct 50(2):109
Zhang M, El-Korchi T, Zhang G, Liang J, Tao M (2014) Synthesis factors affecting mechanical properties, microstructure, and chemical composition of red mud-fly ash based geopolymers. Fuel 134:315–325
Geng JJ, Zhou M, Li Y, Chen Y, Han Y, Wan S, Zhou X, Hou H (2017) Comparison of red mud and coal gangue blended geopolymers synthesized through thermal activation and mechanical grinding preactivation. Constr Build Mater 153:185–192
Zhang N, Liu X, Sun H, Li L (2011) Pozzolanic behaviour of compound-activated red mud-coal gangue mixture. Cem Concr Res 41(3):270–278
Ye N, Yang J, Ke X, Zhu J, Li Y, Xiang C, Wang H, Li L, Xiao B (2014) Synthesis and characterization of geopolymer from bayer red mud with thermal pretreatment. J Am Ceram Soc 97(5):1652–1660
Hu W, Nie Q, Huang B, Shu X, He Q (2018) Mechanical and microstructural characterization of geopolymers derived from red mud and fly ashes. J Clean Prod 186:799–806
Acknowledgements
The financial support from the National Natural Science Foundation of China (Project No. 41372352, 51579132), and Tsinghua University (Project No. 2015THZ02-2, 2015THZ01) are gratefully acknowledged. The support for the testing facility from State Key Laboratory of Hydro Science and Engineering (SKLHSE-2016-D-03) is also acknowledged.
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Dondrob, K., Koshy, N., Wen, Q., Hu, L. (2019). Synthesis and Characterization of Geopolymers from Coal Gangue, Fly Ash and Red Mud. In: Zhan, L., Chen, Y., Bouazza, A. (eds) Proceedings of the 8th International Congress on Environmental Geotechnics Volume 1. ICEG 2018. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-2221-1_44
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DOI: https://doi.org/10.1007/978-981-13-2221-1_44
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