EFFECT OF SILICA FUME AND NANO-SILICA ADDITIVES ON THE MECHANICAL PROPERTIES OF POLYMER COMPOSITES EXPOSED TO HIGH TEMPRETURE
Keywords:
Polymer composites , high temperature , silica fume , nano-silica , compressive strengthAbstract
Polymer composites are very useful in structural applications due to their mechanical properties, friction resistance, long life and wear performance. However, high temperatures cause a significant decrease in compressive strength. Therefore, this study was carried out to increase the post-heating compressive strength as an example of the mechanical properties in polymer composites by using waste and nano silica-based fillers. Therefore, a total of nine groups were cast and waste silica fume was replaced with 2.5-5.0-7.5-10% and nano-SiO2 with 0.5-1.0-1.5-2.0% by weight of the polymer matrix, respectively. The resistance to deformation were studied in terms of mass loss and compressive strength after exposed to temperatures of 25°C, 100°C, 200°C and 300°C. The results showed that waste and nano silica-based fillers significantly improved the overall compression performance after high temperatures, and groups containing minimum dosage of silica and nano silica (2.5% silica fume and 0.5% nano-SiO2) showed the lowest compressive strength loss values.
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