Korniejenko Kinga, Figiela Beata, Miernik Krzysztof, Ziejewska Celina, Marczyk Joanna, Hebda Marek, Cheng An, Lin Wei-Ting
Faculty of Materials Engineering and Physics, Cracow University of Technology, al. Jana Pawła II 37, 31-864 Kraków, Poland.
Department of Civil Engineering, National Ilan University, No. 1, Sec. 1, Shennong Rd., Yilan City 26041, Taiwan.
Materials (Basel). 2021 Sep 9;14(18):5183. doi: 10.3390/ma14185183.
The aim of the article is to analyze the structure and mechanical properties in terms of the cracking mechanics of geopolymer composites based on fly ash and river sand, as well as metakaolin and river sand with three types of reinforcement material: glass fiber, carbon fiber, and aramid fiber, in terms of their use in additive manufacturing. Geopolymer composites were reinforced with fibers in a volume ratio of 0.5%, 1.0%, and 2.0%. Subsequently, these samples were subjected to bending strength tests in accordance with the European standard EN 12390-3. The addition of fibers significantly improved the bending strength of all composites made of metakaolin and sand. The reinforcement with aramid fiber in the amount of 2.0% resulted in more than a 3-fold increase in strength compared to the reinforcement-free composites. An analysis of the morphology of the fibers was carried out on the basis of photos taken from an electron microscope. The correct addition of fibers changes the nature of the fracture from brittle to more ductile and reduces the number of cracks in the material.
本文旨在从地聚合物复合材料的开裂力学角度分析基于粉煤灰和河砂以及偏高岭土和河砂，并添加三种增强材料（玻璃纤维、碳纤维和芳纶纤维）的地聚合物复合材料在增材制造中的结构和力学性能。地聚合物复合材料中纤维的体积比分别为0.5%、1.0%和2.0%。随后，根据欧洲标准EN 12390-3对这些样品进行抗弯强度测试。添加纤维显著提高了所有由偏高岭土和砂制成的复合材料的抗弯强度。与未增强的复合材料相比，添加2.0%的芳纶纤维增强后强度提高了3倍多。基于电子显微镜拍摄的照片对纤维形态进行了分析。正确添加纤维会使材料的断裂性质从脆性变为更具韧性，并减少材料中的裂纹数量。
