鹼激發膠結材料（Alkali-Activated Binders, AAB）因製程無須高溫煅燒，且可大量去化工業副產物，具備極佳之綠色營建材料發展潛力。其中，還原碴與廢玻璃粉所製成鹼激發膠結材雖具有良好之抗壓強度，但其微觀結構類似陶瓷材料，具有極高脆性與離散性，造成抗彎與抗拉強度不足。當材料承受極限載重作用或衝擊外力時，極易發生無預警之瞬間脆性破壞，此一力學特性大幅限制其於實際結構工程中之應用潛力與安全性。
為克服上述缺陷，本研究結合「廢棄物再利用」與「高性能複合材料」之理念，導入具低成本及低碳足跡優勢之再生碳纖維（Recycled Carbon Fibers, RCF）作為加勁材，期望藉由纖維橋接效應改善基材高脆性之問題，並提升力學性能。試驗規劃固定鹼活化劑之水膠比為 0.3、鹼模數為 1、鹼當量為 9% 。探討廢玻璃粉取代率（20%、30%、40%）、再生碳纖維添加量（0%至 1.5%）及纖維長度（6mm 與 12mm）三項試驗變數，對複合材料物理與力學性質之綜合影響。
試驗結果顯示，再生碳纖維之引入能有效發揮微裂縫阻滯與巨觀裂縫橋接機制，有效提升試體抗彎強度與韌性。於 20% 玻璃粉取代率、搭配 12mm 長纖維及 1.5% 添加量之條件下，試體之抗彎強度最高可達 11.503 MPa，較未添加纖維之基準組大幅提升 138.552%。同時，搭配 6mm 纖維於 1.5% 添加量下，最高抗彎韌性達 1881.26 N-mm，增幅達 477.37%。然而，過高添加量易導致纖維結團並引入孔隙缺陷，抗彎強度之最佳添加量落於重量百分比 1.0% 至 1.5% 之間。

Alkali-activated binders (AAB) possess excellent potential as green construction materials due to their ability to consume large amounts of industrial by-products without high-temperature calcination. Among them, AAB made from reducing slag and waste glass powder exhibits good compressive strength. However, its ceramic-like microstructure results in extreme brittleness and high variability, leading to insufficient flexural and tensile strengths, which significantly limits its application and safety in practical structural engineering. To overcome these drawbacks, this study integrates the concepts of "waste reuse" and "high-performance composite materials" by introducing recycled carbon fibers (RCF) as reinforcement. RCF offers the advantages of low cost and a low carbon footprint, and is expected to ameliorate the matrix's high brittleness and enhance mechanical properties through fiber bridging effects. The experiments were conducted with a fixed water-binder ratio of 0.3, an alkali modulus of 1, and an alkali equivalent content of 9%. Three experimental variables were investigated to evaluate their comprehensive effects on the mechanical properties of the composites: waste glass powder replacement ratio (20%, 30%, and 40%), RCF addition amount (0% to 1.5%), and fiber length (6 mm and 12 mm). The results indicate that the introduction of RCF effectively exerts micro-crack arrest and macroscopic crack bridging mechanisms, significantly improving the flexural strength and toughness of the specimens. Under the optimal condition of a 20% glass powder replacement ratio, combined with 12 mm long fibers and a 1.5% addition amount, the flexural strength reached a maximum of 11.503 MPa, a 138.552% increase compared to the unreinforced reference group. Simultaneously, with 6 mm fibers at a 1.5% addition amount, the maximum flexural toughness reached 1881.26 N-mm, showing an increase of 477.37%. However, excessive fiber addition easily led to agglomeration and pore defects. Therefore, the optimal addition amount for maximizing flexural strength was found to be between 1.0% and 1.5% by weight.

[1] 經濟部產業技術司, “全球鋼鐵業碳排現況與低碳化發展動向,” 2023.
[2] 蔡文博, 鄭大偉 且 黃兆龍, “鋼鐵爐碴之循環應用—電弧爐煉鋼還原碴再利用,” 土木水利, 第 冊第四十六卷, 編號 第五期, 2019.
[3] 電弧爐還原碴安定化技術手冊, 經濟部工業局, 2017.
[4] A. S. Brand and E. O. Fanijo, "A Review of the Influence of Steel Furnace Slag Type on the Properties of Cementitious Composites," applied sciences, 2020.
[5] N. Ouffa, M. Benzaazoua, R. Trauchessec, T. Belem, Y. Taha and C. Diliberto, "Potential Reuse of Ladle Furnace Slag as Cementitious Material: A Literature Review of Generation, Characterization, and Processing Methods," minerals, 2024.
[6] 廢玻璃再生粒料應用於級配粒料基底層之使用手冊, 行政院環境保護署 , 2022.
[7] H. Kuhl, Slag cement and process of making the same., 1908.
[8] R.Feret, "Slags for the manufacture of cement," Rev. Mater. Constr. Tr. Publ, vol. 1, 1939.
[9] A. Purdon, “The action of alkalis on blast-furnace slag,” J. Soc. Chem. Ind, 第 冊59, 1940.
[10] M. Trief, "THE TRIEF CEMENT PROCESS: CORROSION‐RESISTING CONCRETE IN U.K.," Corrosion Technology, 1955.
[11] V. Glukhovsky, “Soil silicates. Gosstroyizdat,” Kiev, 1959.
[12] S. C. J. Davidovits, "Synthesis of new high temperature geo-polymers for reinforced plastics/composites," Spe Pactec, 1979.
[13] A. Palomo, M. Grutzeck and M. Blanco, "Alkali-activated fly ashes A cement for the future," Pergamon, 1999.
[14] M. Nasir, A. H. Mahmood and A. A. Bahraq, "History, recent progress, and future challenges of alkali-activated binders – An overview," Construction and Building Materials, no. 426, 2024.
[15] 林凱隆, 許皓翔, 羅康維, 黃兆龍 且 鄭大偉, “不同矽鈉比於TFT-LCD廢玻璃無機聚合物之特性研究,” 於 兩岸環境與能源研討會暨第一屆全球華人環境與能源研討會, 2012.
[16] 趙駿穎, 廢玻璃鹼激發膠結材之研究, 國立成功大學, 2008.
[17] 林偉量, 運用鹼活化技術製作全爐碴混凝土可行性研究, 國立中央大學 土木工程學系, 2014.
[18] 柯文弼, 高溫高壓製程之鹼激發還原碴營建材料, 國立成功大學, 2022.
[19] 王柏華, 高壓廠製鹼激發還原碴地磚之物理性質研究, 國立成功大學, 2025.
[20]“纖維混凝土耐久性研究,” 內政部建築研究所協同研究報告, 2022.
[21] C. Zhao, Z. Wang, Z. Zhu, Q. Guo, X. Wu and R. Zhao, "Research on different types of fiber reinforced concrete in recent years: An overview," Construction and Building Materials, no. 365, 2023.
[22] V. Afroughsabet, L. Biolzi and T. Ozbakkaloglu, "High-performance fiber-reinforced concrete: a review," J Mater Sci, 2016.
[23] A. H. S and K. Kothandapani, "Impact performance and probabilistic reliability of natural fiber-reinforced standard and high-strength concrete," Scientific Reports, 2026.
[24] Y.-F. Li, G. K. Ramanathan, J.-Y. Syu, C.-H. Huang and Y.-K. Tsai, "Mechanical behavior of different fiber lengths mix-proportions carbon fiber reinforced concrete subjected to static, impact, and blast loading," International Journal of Protective Structures, 2024.
[25] J. A. Butenegro, M. Bahrami, J. Abenojar and M. Á. Martínez, "Recent Progress in Carbon Fiber Reinforced Polymers Recycling: A Review of Recycling Methods and Reuse of Carbon Fibers," materials, 2021.
[26] M. Ali, “Carbon fibre reinforcement of cement,” Cement and Concrete Research, 1972.
[27] T. E.-K. R. K. H.A. Toutanji, "Strength and reliability of carbon-fiber-reinforced cement composites," Cem. Concr. Compos, 1994.
[28] P. Aduwenye, B. W. Chong, P. Gujar and X. Shi, "Mechanical properties and durability of carbon fiber reinforced cementitious composites: A review," Construction and Building Materials, no. 452, 2024.
[29] B. Manan and I.-W. Nam, "A Critical Review on the Application of Recycled Carbon Fiber to Concrete and Cement Composites," recycling, 2024.
[30] Y.-F. Li, K.-F. Lee, G. K. Ramanathan, T.-W. Cheng, C.-H. Huang and Y.-K. Tsai, "Static and Dynamic Performances of Chopped Carbon-Fiber-Reinforced Mortar and Concrete Incorporated with Disparate Lengths," materials, 2021.
[31] J. Gao, Z. Wang, T. Zhang and L. Zhou, "Dispersion of carbon fibers in cement-based composites with different mixing methods," Construction and Building Materials, no. 134.