- 學位論文
發泡無機聚合物披覆FRP補強混凝土之耐高溫研究
On the Heat Resistance of FRP Jaketing Concrete Cylinders Covered by Geopolymer Foam
摘要
目前在貼片補強工法中常用之黏結材仍以環氧樹脂為主，其黏結能力雖佳，且在常溫下之補強效果確實顯著，但在高溫下包覆補強之效果則明顯降低。前期研究曾以無機聚合膠脂替代環氧樹脂包覆FRP貼片補強，展現了耐高溫之優點。此外前期研究亦曾以「發泡無機聚合物膠脂」批覆在使用無機聚合物膠脂黏貼包覆FRP補強之混凝土圓柱試體，顯示相當之耐火隔熱效果。 本研究仍採用輕質發泡無機聚合物但披覆於使用環氧樹脂膠結FRP圍束之試體，以測試不同披覆厚度之效果。另為進一步減輕披覆之重量，同時嘗試在發泡無機聚合物內添加防火棉。實驗結果顯示兩種不同型式之披覆在高溫試驗下皆展現確實具有隔熱耐高溫之效能。若以阻隔溫度之表現而言，發泡無機聚合物之披覆效果約為200℃，而添加防火棉之批覆效果則約在150℃左右。
並列摘要
Currently, the bond material mainly used in the jacketing strengthened of RC members is still epoxy-based adhesive material. Its bonding capacity was determined, and the effect of strengthening at room temperature is indeed significant. However, it won’t last in high temperature. Previous studies have used geopolymer to replace epoxy as the bond material for FRP jacket strengthening, the advantage of heat resistance was revealed. Further studies using a kind of porous “geopolymer foam” as the fire resistant coating to cover the concrete cylinders jacket strengthened by FRP using geopolymer, the effect of fire-resistant insulation was considerably shown. The present study used again the light weight “geopolymer foam” as the fire resistant coating to cover the concrete cylinders jacket strengthened by FRP , but this time using epoxy as the bond material. The major parameter was the thickness of coating. To further reduce the weight of coating, fire resistant cotton was added into the geopolymer foam. The results revealed that both types of coating showed quite well performance in heat resistance. As for the effect of heat insulation, the geopolymer foam stands a temperature difference of 200 ℃, while the geopolymer foam plus fire resistant cotton is around 150 ℃.