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Epoxy is toughened with polymethylmethacrylate (PMMA) and different percent weights of granite powder and fly ash are added to this matrix. The tensile and flexural strengths of these composites are determined. The variation of tensile and flexural strengths with granite powder and fly ash content is studied. For comparison, epoxy is also used as the matrix. The tensile and flexural strengths increased with PMMA content up to 4% (w/w) in the composites. The granite powder composites showed better properties than fly ash composites.

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Composites are prepared using unsaturated polyester as the matrix and granite powder and fly ash as fillers. The tensile and flexural strengths of these composites are determined. The variation of tensile and flexural properties with weight fraction of the fillers is studied. The properties of granite powder composites are found to be better than those of fly ash composites.