In this research work, designing and fabrication of hybrid epoxy polymer composite materials had been carried out. It consists of basalt fiber (constant fraction) and marble dust particulates (0–10 wt% @ step of 2.5%) ensuing five compositions namely, MBE-0, MBE-2.5, MBE-5, MBE-7.5, and MBE-10. The specimen’s undergone physical, mechanical, and thermo-mechanical characterizations followed by three-body abrasive wear performance evaluation. Parametric optimizations of the wear have been evaluated with the Taguchi technique. The performance data are used to rank the compositions using a hybrid AHP-VIKOR selection making tool. It has been observed that voids content improves with reinforcement up to 5 wt% marble dust reinforcement, thereafter, it deteriorates sharply. The mechanical properties with 5 wt% marble dust reinforcement found to be highest. The thermo-mechanical characteristics like modulus and damping improve with marble dust reinforcement and temperature. The Cole-Cole plots reveal the heterogeneity present in the composites. The Taguchi’s analysis reveals the order of operating factors influencing specific wear rate as abrading distance > normal load > reinforcement composition > abrasive size. The steady state-specific wear rate of the composites reveals decremented rate across the abrading distance range irrespective of reinforcement proportions and at any specific abrading distance the order it followed as MBE-5 < MBE-7.5 < MBE-2.5 < MBE-10 < MBE-0. The ranking analysis using hybrid AHP-VIKOR technique predicts the ranking sequence as MBE-5 > MBE-7.5 > MBE-2.5 > MBE-10 > MBE-0, which are in-line with subjective analysis.

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In this research article, we investigate the physical and mechanical properties of composites comprised of unsaturated polyester resin (UPR) and recycled polyethylene terephthalate (PET) with 10% to 40% volume of bamboo fibre (BF). Chemical evaluation of BF revealed that BF has a cellulose content of 49.86%, hemicellulose content of 25.17%, and lignin content of 7.14%. As the UPR’s different connections, FTIR identified an interconnecting framework between the styrene monomer (ST) and the unsaturated polyester (UP). It was found by TGA-DTG that there were two breakdown phases. UPR’s physical and mechanical properties were found to be affected by increasing the amount of fibre in the material, with the water absorption rising from 0.7% to 2.81% and the density (1214.38 to 1168.83 kg/m), flexural strength (51.81 to 28.92 MPa), flexural modulus (2.78 to 2.83 GPa), and tensile strength (9.71 to 3.86 MPa) all decreasing at the same time. On the other hand, the hardness increased from 82.4 Shore D to 67.9 Shore D. Fibre distribution flaws in the UPR were found, affecting the composites' mechanical characteristics. By repurposing two waste products, this study helps create new materials that are better for the surroundings.

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