The Construction and Ceramics Industry Waste Gypsum Valorization Possibilities
The construction work and ceramic materials industry debris is an important source of waste that ends up unused and disposed on municipal solid waste landfills. Besides concrete and clay based materials, gypsum waste is one of the larger contributors to the building and industry byproducts production chain. The possibilities of waste gypsum revitalization and reutilization in the ceramic industry and civil engineering are investigated in this paper. The gypsum in its dihydrate form is used for moulds in the production of ceramic cast materials. The interest in recovering gypsum waste is increasing as the demand for sustainable production grows. Before secondary gypsum is reapplied, its properties and the recycling process have to be technically and environmentally evaluated. By recycling gypsum waste, natural gypsum deposits are being preserved. Furthermore, large percentage of this byproduct achieves its reutilization potential. In this context, this paper investigates physical properties, the chemical composition and the thermal behavior of the waste gypsum. The goal is to assess the feasibility of using waste gypsum and to evaluate the viability of the recycling process. The results indicate that the reutilization of gypsum waste might provide a viable substitute for clay in the ceramics industry. Reapplication of the revitalized secondary gypsum is approved from both economical and environmental aspect.
KeywordsConstruction materials Physical and mechanical properties Recycling Eco-friendly ceramics
This investigation was supported by Serbian Ministry of Education, Science and Technological Development and it was conducted under following projects: TR 34006, OI 172057, III 45008 and TR 34013.
- 3.Directive 2002/91/EC of the European Parliament and of the Council of 16 December 2002 on the energy performance of buildingsGoogle Scholar
- 27.G.A. Lager, Th Armbruster, F.J. Rotella, J.D. Jorgensen, D.G. Hinks, A crystallographic study of the low-temperature dehydration products of gypsum, CaSO4·2H2O, hemihydrate CaS04·0.5H20, and γ-CaSO4. Am. Mineral. 69, 910–918 (1984)Google Scholar
- 29.M.C. Ball, L.S. Norwood, Studies in the system calcium sulphate—water. Part I. Kinetics of the dehydration of calcium sulphate dehydrate. J. Chem. Soc. A. 1633–1637 (1969)Google Scholar
- 32.L. Andrić, A. Terzić, M. Petrov, S. Stojanović, M. Kostović, Energy conversion in phosphate ore grain mixture activated via ultra-centrifugal mill. Int. J. Miner. Process. 143, 1–11 (2015)Google Scholar
- 35.L. Andrić, A. Terzić, Z. Aćimović-Pavlović, L. Pavlović, M. Petrov, Comparative kinetic study of mechanical activation process of mica and talc for industrial application. Compos. B Eng. 59, 181–190 (2014)Google Scholar