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The friction and wear performance of pure LDPE and 10%, 30%, 50% and 70% basalt filled (by wt) LDPE composite were comparatively evaluated under dry sliding conditions. Wear tests were carried out at room temperature under 5, 10 and 20N loads and at 0.5, 1.0 and 1.5 m/s sliding speeds. The coefficients of friction of the composites were significantly influenced with increase in basalt content. Friction coefficient of the LDPE was getting decreased from 0.51 to 0.13 with increase in basalt content, depending on applied loads and sliding speeds. The results show that the wear rates for pure LDPE and basalt filled composites increase with increasing loads and sliding speeds. The wear rates of the basalt filled composites were significantly affected from the basalt content. Wear rates of the LDPE was decreased from 2.596×10 −3 to 6.8×10 −5 mm 3 /m with increase in basalt content, depending on applied loads and sliding speeds.

In recent years, the use of filler materials, such as red mud, in composites has increased. In this study, the use of industrial waste red mud as a filler material in an isotactic polypropylene (iPP) polymer–matrix composite (PMC) was investigated. A variety of mechanical tests were performed on the unreinforced polymer and on composites with 10, 20, 30, 40 and 50 wt.% red mud. Tensile strength, three-point flexural strength and hardness tests have been carried out, and the relationships between the red-mud content and properties were examined. Scanning electron microscopy (SEM) was applied to the fractured surfaces after three-point flexural tests. The results showed that, while the values of tensile and flexural strength were decreased, the hardness was increased with increasing red-mud content.

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