Furtos Gabriel, Prodan Doina, Sarosi Codruta, Moldovan Marioara, Korniejenko Kinga, Miller Leonard, Fiala Lukáš, Iveta Nováková
Raluca Ripan Institute of Research in Chemistry, Babes-Bolyai University, 400294 Cluj-Napoca, Romania.
Faculty of Materials Engineering and Physics, Cracow University of Technology, 31-864 Cracow, Poland.
Materials (Basel). 2024 Jan 2;17(1):248. doi: 10.3390/ma17010248.
Fly ash-based geopolymers represent a new material, which can be considered an alternative to ordinary Portland cement. MiniBars™ are basalt fiber composites, and they were used to reinforce the geopolymer matrix for the creation of unidirectional MiniBars™ reinforced geopolymer composites (MiniBars™ FRBCs). New materials were obtained by incorporating variable amount of MiniBars™ (0, 12.5, 25, 50, 75 vol.% MiniBars™) in the geopolymer matrix. Geopolymers were prepared by mixing fly ash powder with NaSiO and NaOH as alkaline activators. MiniBars™ FRBCs were cured at 70 °C for 48 h and tested for different mechanical properties. Optical microscopy and SEM were employed to investigate the fillers and MiniBars™ FRBC. MiniBars™ FRBC showed increasing mechanical properties by an increased addition of MiniBars™. The mechanical properties of MiniBars™ FRBC increased more than the geopolymer wtihout MiniBars™: the flexural strength > 11.59-25.97 times, the flexural modulus > 3.33-5.92 times, the tensile strength > 3.50-8.03 times, the tensile modulus > 1.12-1.30 times, and the force load at upper yield tensile strength > 4.18-7.27 times. SEM and optical microscopy analyses were performed on the fractured surface and section of MiniBars™ FRBC and confirmed a good geopolymer network around MiniBars™. Based on our results, MiniBars™ FRBC could be a very promising green material for buildings.
基于粉煤灰的地质聚合物代表了一种新型材料，可被视为普通硅酸盐水泥的替代品。MiniBars™是玄武岩纤维复合材料，被用于增强地质聚合物基体，以制备单向MiniBars™增强地质聚合物复合材料（MiniBars™ FRBCs）。通过在地质聚合物基体中加入不同含量的MiniBars™（0、12.5、25、50、75体积%的MiniBars™）获得了新材料。地质聚合物通过将粉煤灰粉末与作为碱性活化剂的硅酸钠和氢氧化钠混合制备而成。MiniBars™ FRBCs在70°C下养护48小时，并测试其不同的力学性能。采用光学显微镜和扫描电子显微镜研究填料和MiniBars™ FRBC。随着MiniBars™添加量的增加，MiniBars™ FRBC的力学性能有所提高。MiniBars™ FRBC的力学性能比未添加MiniBars™的地质聚合物提高得更多：抗弯强度提高了>11.59 - 25.97倍，抗弯模量提高了>3.33 - 5.92倍，抗拉强度提高了>3.50 - 8.03倍，拉伸模量提高了>1.12 - 1.30倍，上屈服抗拉强度下的力载荷提高了>4.18 - 7.27倍。对MiniBars™ FRBC的断裂表面和截面进行了扫描电子显微镜和光学显微镜分析，证实了MiniBars™周围存在良好的地质聚合物网络。基于我们的研究结果，MiniBars™ FRBC可能是一种非常有前景的建筑绿色材料。
