알칼리 환경에 대한 GFRP복합재료의 충진제에 따른 내구성 향상에 관한 연구

Abstract

The effect of alkaline environmental condition on durability of GFRP composites according to additives has been investigated. Additives used were polyvinyl alcohol(PVA), kaolin and alumina powder. Weight gains increased with immersion time in all GFRP composites at 80℃. But weight gain of specimen added PVA did not differ through the whole immersion time in both tap water and alkaline solution at 20 and 80℃. Tensile strength decreased with immersion time in all environment conditions. Tensile strength of GFRP composites regardless of additives decreased rapidly up to 5days of immersion and then decreased slowly up to 30days in alkaline solution environment at 80℃. The weight gains were not much difference in both tap water and alkaline solution at 20℃. But the ones of GFRP composites added PVA was smaller than the composites without additive in all aqueous at 20℃. Test strength of GFRP composites added polyvinyl alcohol has improved through the whole immersion time in both tap water and alkaline solution environment at 20℃. The tensile strength of GFRP composites in both tap water and alkaline solution at 20℃ was much bigger than the one in alkaline solution at 80℃.