無機聚合物耐火性能研究及其在結構補強之應用

On the Fire Resistance of Geopolymer and Its Applications to Structural Strengthening

方禎璋(Chen -Chang Fang)

指導教授 ： 吳傳威 ； 鄭大佑

國立臺北科技大學/工程學院/工程科技研究所/博士(2009年)

摘要

基於對環氧樹脂膠合FRP補強RC結構物耐火性能之疑慮，本研究先進行了一系列相關實驗。證實環氧樹脂受熱≧60℃即發生軟化，≧100℃開始熔融，在250℃∼350℃左右因混凝土孔隙水氣無法排除，曾發生全面FRP圍束試體發生爆裂之狀況。此外，當溫度≧450℃環氧樹脂將逐漸揮發，如達火害溫度（≧600℃）則會燃燒產生有毒氣體，此等現象潛藏相當程度的危險因子。因此，本研究致力於以近年新開發之矽鋁鍵結材料無機聚合物取代環氧樹脂。首先以選定的配比進行基本物理性能及阻絕高溫實驗，初步得到相當成果。其後再應用於膠合FRP補強RC試體及耐火延燒試驗。結果顯示，除在常溫下確有補強效能之外，在≧600℃持溫延時60分鐘，仍保有相當的膠合效果。另為突破無機聚合物在防火性能的表現，本研究亦嘗試開發發泡、及添加蛭石、珍珠岩等輕質材料。由實驗得知，試體前端10cm以1000±30℃噴燒120分鐘，其背面溫度僅約100℃，可為絕佳之防火披覆。且無機聚合物的配比材料在製造過程及膠體硬化時皆不會產生高溫及環境污染，屬於符合環保的耐火、補強材料。最後，本研究另對於無機聚合物應用在古蹟補強或其他不同惡劣環境下的建築材料基材方面，提出建議。

關鍵字

環氧樹脂 ； 火害 ； 無機聚合物 ； 防火披覆 ； 污染

並列摘要

Due to the apprehension on heat resistance of FRP strengthened RC members by epoxy, a series of experiments were conducted previously. It was found that epoxy resin became soft at 60C, and began to melt while exceeded 100C. When the temperature reached 250C ~ 350C, since the water vapor in concrete porous were sealed, some complete FRP confined specimen even explored. Other than that, the epoxy gradually evaporated at 450C, and during the fire hazard heat (600C), certain poisonous gas may release. This phenomenon possesses a considerable degree of risk. The present study thus devoted to replace epoxy with a newly developed material, namely “geopolymer”. At first, experiments to a chosen formula for testing the basic physical and heat isolation properties were conducted, and some preliminary results were obtained. Then, the proposed material was applied to stick FRP on RC specimen for testing the effectiveness of strengthening as well as the property of fire resistance. The results showed that the effect of strengthening was not only good for normal temperature, but remained adhesive under 600C for 60 min. In addition, the present research also developed some porous or light weight material as fireproof coating. The outcomes showed that while the temperature in front of the test specimen 10cm by 1000±30℃ to spurt the fever 120 minutes, but in behind was only around 100C. The manufacturing process for formula components of geopolymer and its setting would not create high heat or pollution. It is no doubt an environment friendly fire resistance material. Finally, other applications such as on strengthening of ancient remains, or as a building material used in various adverse environments are suggested.

並列關鍵字

epoxy ； fire hazard ； geopolymer ； fire resistance materia ； pollution

參考文獻

[65] 楊欽雄、方禎璋、吳傳威 「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」 中華民國第九屆結構工程研討會 Paper no：A-001 高雄 2008.08。

[67] 吳思緯、方禎璋、吳傳威 無機聚合樹脂應用於RC梁FRP貼片撓曲補強之耐高溫研究 中華民國第九屆結構工程研討會 高雄 2008.08。

[74] 戴詩潔 高嶺石鋁矽酸鹽聚合材料之研究 碩士論文 國立台北科技大學材料及資源系 台北 2005。

[76] 陳建任 RC梁應用環氧樹脂貼覆CFRP剪力補強之耐高溫研究 碩士論文 國立台北科技大學土木與防災研究所 台北 2009.07 第32、51頁。

[6] M .S . Abrams , ' ' Concrete Strength of Concrete at temperatures to 16000F , ACI SP-25 , ( 1968 )。