• Fiúza, A.
• Ferreira, Aj
• Ribeiro, Mc

Abstract

The need for cost-effective end-use applications for fibre reinforced polymer (FRP) wastes has led to a relative great amount of research work on recycling techniques and related potential added value applications. Mechanical recycling, with size reduction to fibrous and/or powdered products, has been considered the most cost-effective recycling technique, at least for relative low cost and clean thermoset FRP materials, but more feasible markets outlets for the recyclates should be identified. The most extensive research work in this field has been carried out on Portland cement and polymer concretes in which grinded FRP scrap has been incorporated either as reinforcement, aggregate or filler replacement. As function of specific concrete mix design formulation and sorting techniques of recyclates, reported added values comprise sometimes slight increase on mechanical properties, decrease of permeability, a less drying shrinkage and wear loss, and a global cost reduction of raw materials. Potential applications of FRP recyclates in concrete include precast paving slabs, roof tiles, railroad sleepers, wall panels, paving blocks and architectural cladding materials. However, these products have not been yet successfully reflected in the industry market. This paper is aimed at enclosing and summarizing an updated review regarding all these issues with special emphasis on glass FRP (GFRP) wastes: recycling techniques, mix design formulations of GFRP recyclates modified concrete materials, end-use applications and market outlook.

Topics

• impedance spectroscopy
• glass
• glass
• laser emission spectroscopy
• cement
• permeability
• thermoset
• drying