Abstract
This work presents the feasibility of reusing a glass fiber resulting from the thermolysis and gasification of waste composites to obtain glass-ceramic tiles. Polyester fiberglass (PFG) waste was treated at 550℃ for 3 h in a 9.6 dm3 thermolytic reactor. This process yielded an oil (≈24 wt%), a gas (≈8 wt%) and a solid residue (≈68 wt%). After the polymer has been removed, the solid residue is heated in air to oxidize residual char and remove surface contamination. The cleaning fibers were converted into glass-ceramic tile. A mixture consisting of 95 wt% of this solid residue and 5% Na2O was melted at 1450℃ to obtain a glass frit. Powder glass samples (<63 μm) was then sintered and crystallized at 1013℃, leading to the formation of wollastonite-plagioclase glass-ceramic materials for architectural applications. Thermal stability and crystallization mechanism have been studied by Differential Thermal Analysis. Mineralogy analyses of the glass-ceramic materials were carried out using X-ray Diffraction.
Highlights
The sustainable elimination of composites still remains as a challenge nowadays
This paper evaluates the valorisation of waste composites by a thermolysis and gasification process and the suitability of the glass fiber as alternative raw materials in the manufacture of wollastonite-plagioclase glassceramic material for architectural applications
742 Recycling of Glass Fibers from Fiberglass Polyester Waste Composite for the Manufacture of Glass-Ceramic Materials where Yt is the yield of the solid residue obtained during thermolysis, Yg is the mass loss during gasification and WGF is the glass fiber content of the initial PGF waste
Summary
Global production of composites materials increases every year, and it is expected to reach 10.3 Mt in 2015 Of all these composites, about 90% corresponds to thermostable composites with glass fibers (fiberglass reinforced plastics (FGRP)). Recycling of Glass Fibers from Fiberglass Polyester Waste Composite for the Manufacture of Glass-Ceramic Materials 741 suffer the degradation of their physical properties, limiting their reuse [5,14]. The residual glass fiber was used in the manufacture of new composites with no important decline in the mechanical properties of the final product [16,17]. This paper evaluates the valorisation of waste composites by a thermolysis and gasification process and the suitability of the glass fiber as alternative raw materials in the manufacture of wollastonite-plagioclase glassceramic material for architectural applications. The fibers are recovered for reuse via glass-ceramic material
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