Fabrication of Ceramic Moulds Using Recycled Shell Powder and Sand with Geopolymer Technology in Investment Casting
Source abstract
Abstract
Lost-wax casting, also called precision casting, is the process of casting a duplicate metal sculpture cast an original sculpture. The ceramic shell mould used in lost-wax casting usually consists of several layers formed with fine zircon and granular mullite particles using silica gel as a binder. However, it is a complicated and time-consuming process. Large amounts of waste moulds that need to be disposed and recycled become an environmental concern. In this study, waste shell sand from the recycled mould and calcium carbonate/metakaolin were used as raw materials to prepare geopolymer slurry and coating. The influence of mixing ratio and the SiO2/K2O modulus of the alkali solution on the setting time and green/fired strength were evaluated. Ceramic shells with one to four layers of geopolymer slurry and waste sand sprinkling were fabricated and tested for their permeability and green/fired strength. It was found that geopolymer shells had higher green/fired strength and better permeability than the original zircon/mullite shell. For foundry practice, metal casts were fabricated using recycled ceramic shell moulds with one to four layers of geopolymer coating. All cast results have their dimensions all within tolerance limitation and up to 13 h can be saved for the preparation of shell moulds.
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Research context
OpenAlex topics: Concrete and Cement Materials Research · Innovations in Concrete and Construction Materials · Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Mineral Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
References (32)
Show source-provided references
1. Development of techniques for predicting ceramic shell properties for investment casting10.1179/096797802225003316 ↗
2. Study on recycled waste foundry sand as raw materials of cement additives
3. The geopolymerisation of alumino-silicate minerals10.1016/S0301-7516(99)00074-5 ↗
4. Davisovits, J. (2011). Geopolymer Chemistry and Applications, Institute Géopolymère, Geopolymer Institute. [3rd ed.].
5. Synthesis of geopolymer composites from blends of CFBC fly and bottom ashes10.1016/j.fuel.2012.02.059 ↗
6. Influence of binding rates on strength properties of moulding sands with the geopol binder10.2478/afe-2014-0009 ↗
7. Harmfulness assessment of moulding sands with a geopolymer binder and a new hardener, in an aspect of the emission of substances from the BTEX group10.1515/amm-2015-0056 ↗
8. Influence of the reclaim addition on properties of moulding sands with the geopol binder10.1515/afe-2015-0025 ↗
9. Easy knock-out moulding and core sands-The future for metal casting
10. GEOPOL®. The innovated environment friendly inorganic binder system10.24425/afe.2019.127103 ↗
11. High strength metahalloysite based geopolymer10.1016/j.compositesb.2013.09.034 ↗
12. Chemical and Physical Characterization of Boiler Ash from Palm Oil Industry Waste for Geopolymer Composite
13. Processing and properties of polymer filled geopolymer ceramics fabricated via powder metallurgy method: A review
14. New Investigation Method of the Permeability of Ceramic Moulds Applied in the Investment Casting Technology10.2478/afe-2013-0047 ↗
15. Effect of water-to-geopolymer binder ratio on the production of fly ash based geopolymer concrete
16. The effect of particle size distribution on the antithixotropic and shear thickening properties of coal–water dispersions10.1122/1.550246 ↗
17. Experimental study of the viscosity of suspensions: Effect of solid fraction, particle size and suspending liquid10.1016/j.powtec.2014.05.044 ↗
18. Modeling of viscosity for power plant ash slurry at higher concentrations: Effect of solids volume fraction, particle size and hydrodynamic interactions10.1016/j.powtec.2009.07.005 ↗
19. Effects SiO2/Na2O molar ratio on mechanical properties and the microstructure of nano-SiO2 metakaolin-based geopolymers10.1016/j.conbuildmat.2013.12.003 ↗
20. Geopolymer technology: The current state of the art10.1007/s10853-006-0637-z ↗
21. Alkaline activation of metakaolin10.1023/A:1010176321136 ↗
22. Geopolymer formation processes at room temperature studied by 29Si and 27Al MASNMR10.1016/j.msea.2005.02.002 ↗
23. Alkaline Activation of Metakaolin: Effect of Calcium Hydroxide in the Products of Reaction10.1111/j.1151-2916.2002.tb00070.x ↗
24. Granizo, M.L., Blanco, M.T., Puertas, F., and Palomo, A. (1997, January 2–6). Alkaline activation of metacaolin: Influence of synthesis parameters. Proceedings of the Tenth International Congress on Chemistry of Cement, Goteborg, Sweden.
25. (Micro)-structural comparison between geopolymers, alkali-activated slag cement and Portland cement10.1016/j.jeurceramsoc.2005.12.021 ↗
26. Thermal activation of albite for the synthesis of one-part mix geopolymers10.1111/j.1551-2916.2011.04925.x ↗
27. Lightweight geopolymer made of highly porous siliceous materials with various Na2O/Al2O3 and SiO2/Al2O3 ratios10.1016/j.msea.2011.04.044 ↗
28. Formation of Ceramics from Metakaolin-Based Geopolymers: Part I—Cs-Based Geopolymer10.1111/j.1551-2916.2008.02790.x ↗
29. Jonghe, L.C.D., and Rahaman, M.N. (2013). Sintering of Ceramics. Handbook of Advanced Ceramics, Elsevier Inc.
30. Chang, K.T. (2009). A Study of Carbonate Mineral Powders Additives on the Collapsibility of Ceramic Shell Mould for Investment Casting. [Master’s Thesis, National Taipei University of Technology].
31. Formation of Ceramics from Metakaolin-Based Geopolymers. Part II: K-Based Geopolymer10.1111/j.1551-2916.2008.02922.x ↗
32. Kinetic study of the thermal decomposition of calcium carbonate by isothermal methods of analysis