無機聚合樹脂應用於混凝土試體包覆FRP補強之耐高溫研究

On the Heat Resistance of Concrete Cylinders Confined by FRP using Geopolymer

楊欽雄(Chin-Shyong Yang)

指導教授 ： 吳傳威

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00463

摘要

應用環氧樹脂黏貼纖維複合材料之補強工法目前甚為普遍，環氧樹脂黏結性頗佳，在常溫下之補強效果甚受肯定，但在高溫狀態時，由於黏著性逐漸失效造成補強效果降低，甚至會因孔隙封閉而在承受較高溫度時發生構件爆裂現象。前期研究應用一種新開發之「無機聚合樹脂」黏結材料取代環氧樹脂，用以黏貼纖維包覆混凝土試體，初步結果顯示確可發揮圍束補強效果，且其高溫方面之性能則明顯優於環氧樹脂。
本研究以無機聚合樹脂製作包覆FRP補強之混凝土圓柱試體，進行耐高溫試驗，觀察在不同溫度下圍束補強之效果變化，同時探討尺寸效應，規劃試驗參數包括混凝土試體強度、試體尺寸、包覆層數、纖維種類、高溫溫度等。結果顯示應用無機聚合樹脂黏貼包覆之試體，除在高溫時仍能提供相當的圍束效果之外，更由於其多孔隙性質而能將試體內部因受熱產生之蒸氣壓力釋放，而不至產生爆裂。

關鍵字

無機聚合樹脂 ； 環氧樹脂 ； 圍束補強

並列摘要

In the techniques of structural retrofitting, FRP jacket using epoxy as the cohesive material is quite popular. Epoxy has good cohesive property, and displays pretty good strengthening effect under room temperature. However, its cohesion may gradually reduce while the temperature arising, and sequentially lose the strengthening effect. Furthermore, the structural elements even may burst during high temperature state due to the surface is sealed. In the preceding researches, a newly developed material, namely geopolymer, was used to replace epoxy as the cohesive material. Preliminary result indicated that the effect of confinement indeed exists, and the property of temperature resistance is better than that of using epoxy. In the present research that the FRP confined concrete cylinders are prepared to investigate the confined effect under different temperature, as well as the size effect. In this study, the experimental parameters includes strength of concrete, specimen, covered layers, fiber used and heat temperature. The results indicate that the effectiveness of confinement is considerably retained under high temperature. Moreover, since geopolymer is a porous material so that the vapor pressure from the moisture of the specimens produced by high temperature may be released, and then reduce the possibility of bursting.

並列關鍵字

geopolymer ； epoxy ； confined strengthening

參考文獻

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