MICROWAVE HEATING PREPARATION OF A THERMAL INSULATION MATERIAL FOR BUILDING CONSTRUCTION USING GLASS WASTE AND COAL ASH
The paper presents results of the manufacturing process of a porous high-strength glass-ceramic foam using colorless glass waste (between 35.5-50.0%) and coal fly ash (between 24.6-35.5%) as raw materials, sodium borate (between 25.0-28.0%) as a fluxing agent and calcium carbonate (between 0.4-1.0%) as a foaming agent. The heating technique was based on the conversion of microwave energy into heat, the sintering/foaming temperature varying between 802-815 ºC. The characteristics of the glass-ceramic foam samples were: apparent density between 0.38-0.45 g/cm3, porosity between 78.6-81.9%, thermal conductivity in the range 0.049-0.064 W/m·K, compressive strength between 2.5-6.0 MPa and pore size below 0.60 mm. The specific energy consumption had very low values (0.72-0.82 kWh/kg) confirming the high energy efficiency of the predominantly direct microwave heating technique.
2. Wang, S., Zhang, C., Chan, J., Utilization of coal fly ash for the production of glass-ceramics with unique performances. A brief review, Journal of Materials Science & Technology, Vol. 30, No. 12, pp. 1208-1212, (2015).
3. Zierold, K.M., Odoh, C., A review on fly ash from coal-fired power plants: chemical composition, regulations, and health evidence, Reviews on Environmental Health, Vol. 35, No. 4, pp. 401-418, (2020).
4. User guidelines for waste and byproduct materials in pavement construction, Report of Federal Highway Administration Research and Technology, US Department of Transportation, (1997).
5. Yao, Z.T., Ji, X.S., Hi, Y.Q., A comprehensive review on the applications of coal fly ash, Earth-Science Reviews, February (2015).
6. Wu, J.P., Rawlings, R.D., Lee, P.D., Kershaw, M.J., Boccaccini, A.R., Glass-ceramic foams from coal ash and waste glass: production and characterization, Advances in Applied Ceramics, Vol. 105, No. 1, pp. 32-39, (2006).
7. Fernandes, H.R., Tulyaganov, D.U., Ferreiro, J., Production and characterization of glass-ceramic foams from recycled materials, Advances in Applied Ceramics, Vol. 108, No. 1, pp. 9-13, (2009).
8. Mustaffar, M.I., Mahmud, M.H., Processing of highly porous glass ceramic from glass and fly ash wastes, AIP Conference Proceedings of the 3rdInternational Sciences, Technology & Engineering Conference (ISTEC)-Material Chemistry, Vol. 2031, No. 1, Penang, Malaysia, April 17-18, (2018).
9. Bai, J., Yang, X., Xu, S., Tang, J., Preparation of foam glass from waste glass and fly ash, Materials Letters, Vol. 136, pp. 52-54, (2014).
10. Mi, H., Yang, J., Su, Z., Wang, T., Li, Z., Huo, W., Advances in Applied Ceramics. Structural, Functional and Bioceramics, Vol. 116, No. 7, pp. 400-408, (2017).
11. Fernandes, H. R., Tulyaganov, D. U., Ferreira, J., Preparation and characterization of foams sheet glass and fly ash using carbonates as foaming agents, Ceramics International, Vol. 35, No. 1, pp. 229-235, (2009).
12. Chakartnarodom, P., Ineure, P., Foam glass development using glass cullet and fly ash or rice husk ash as the raw materials, Key Engineering Materials, Vol. 608, pp. 73-78, (2014).
13. Zhu, M., Ji, R., Li, Z., Zhang, Z., Preparation of glass ceramic foams for thermal insulation applications from coal fly ash and waste glass, Construction and Building Materials, Vol. 112, No. 1, pp. 398-405, (2016).
14. Paunescu, L., Dragoescu, M.F., Axinte, S.M., Comparative analysis of the own experimental techniques of producing the foamed glass-ceramic, Journal of Engineering Studies and Research, Vol. 22, No. 2, pp. 55-64, (2016).
15. Dragoescu, M.F., Paunescu, L., Axinte, S.M., Nonconventional heating method used to obtain glass foam from clear flat glass waste, Nonconventional Technologies Review, Vol. 22, no. 2, pp. 36-40, (2018).
16. Paunescu, L., Axinte, S.M., Dragoescu, M.F., Cosmulescu, F., Experimental use of microwave in the high temperature foaming process of glass waste to manufacture heat insulating materials in building construction, Journal La Multiapp, Vol. 1, No. 3, pp. 17-26, (2020).
17. Scarinci, G., Brusatin, G., Bernardo, E., Cellular Ceramics: Structure, Manufacturing, Properties and Applications, Wiley-VCH GmbH & KGaA, Weinheim, Germany, Scheffler, M., Colombo,P. eds., pp. 158-176, (2005).
18. Karunadasa, K.S.P., Manoratne, C.H., Pitawala, H.M.T.G.A., Rajapakse, R.M.G., Thermal decomposition of calcium carbonate (calcite polymorph) as examined by in-situ high-temperature X-ray powder diffraction, Journal of Physics and Chemistry of Solids, Vol. 134, pp. 21-28, (2019).
19. Jones, D.A., Lelyveld, T.P., Mavrofidis, S.D., Kingman, S.W., Miles, N.J., Microwave heating applications in environmental engineering – a review, Resources, Conservation and Recycling, Vol. 34, No. 2, pp. 75-90, (2002).
20. Paunescu, L., Axinte, S.M., Grigoras, B.T., Dragoescu, M.F., Fiti, A., Testing the use of microwave energy to produce foam glass, European Journal of Engineering and Technology, Vol. 5, No. 4, pp. 8-17, (2017).
21. Bray, C., Dictionary of glass, in Materials and Techniques, Second edition, A & C Black, London and Pennsylvania Press, Philadelphia, (2001).
22. Manual of weighing applications, Part 1-Density, (1999).
23. Anovitz, L.M., Cole, D.R., Characterization and analysis of porosity and pore structures, Reviews in Mineralogy and Geochemistry, Vol. 80, pp. 61-164, (2005).
24. Miller, H.F., Borax, borates and other boron-carring compounds. Agronomy notes, University of Kentucky, US, p. 157, (1964).
25. Paunescu, L., Dragoescu, M.F., Axinte, S.M., Paunescu, B.V., Dense glass foam produced in microwave field, Journal of Engineering Studies and Research, Vol. 24, No. 1, pp. 30-36, (2018).
26. Kharissova, O., Kharissov, B.I., Ruiz Valdés, J.J., Review: The use of microwave irradiation in the processing of glasses and their composites, Industrial & Engineering Chemistry Research, Vol. 49, No. 4, pp. 1457-1466, (2010).
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