The results highlight the importance of sieving and sorting operations during and after recycling of process FRP wastes. Relevant properties of the recyclates that will affect the performance of final composite are dictated by these key operations. In the research
studies carried out by Rikards et al. [55] and Palmer et al., which constitute some of the few thorough investigations that take into consideration fibre and filler fractions, with various combinations of recyclate grades and replacement percentages, this feature is also stressed. With a well-designed combination of powder and fibre fractions, better properties on the final composites can be achieved due better packing of overall aggregate system,without compromising both workability and wettability of
the mixture.