Brugaletta Francesca, Becher Anton Frederik, Rostagno Danilo Laurent, Kim JeongHye, Fresneda Medina José Ignacio, Ziejewska Celina, Marczyk Joanna, Korniejenko Kinga
Faculty of Chemical Engineering for Industrial Sustainability, Department of Civil Engineering and Architecture, Università degli Studi di Catania (University of Catania), Piazza Università, 2, 95124 Catania, Italy.
Institut für Maschinenkunde und Fertigungstechnik, Technische Universität Bergakademie Freiberg, Gustav-Zeuner-Straße 7, 09599 Freiberg, Germany.
Materials (Basel). 2024 May 29;17(11):2633. doi: 10.3390/ma17112633.
The main motivation for this research was to improve the properties of geopolymers by reinforcement using synthetic and natural fibers, and to gain new knowledge regarding how the nature and/or the quantity of reinforcement fibers influences the properties of the final geopolymers. The main objective was to investigate the effects of different types of reinforcement fibers on the properties of the geopolymers. These reinforcement fibers were mainly environmentally friendly materials that can be used as alternatives to ordinary Portland cement. The authors used fly ash and river sand as the raw materials for the matrix, and added carbon fibers (CF), flax fibers (FF), or a hybrid of both (CFM) as reinforcements. The samples were prepared by mixing, casting, and curing, and then subjected to various tests. The main research methods used were compressive strength (CS), flexural strength (FS), water absorption (WA), abrasion resistance (Böhme's disk method), microstructure analysis (SEM), chemical composition (XRF), and crystal structure analysis (XRD). The results showed that the addition of fibers partially improved the mechanical properties of the geopolymers, as well as reducing microcracks. The CF-reinforced geopolymers exhibited the highest compressive strength, while the FF-reinforced geopolymers showed the lowest water absorption. The authors, based on previous research, also discussed the factors that influence fiber-matrix adhesion, and the optimal fiber content for geopolymers.
本研究的主要动机是通过使用合成纤维和天然纤维增强来改善地质聚合物的性能，并获取有关增强纤维的性质和/或数量如何影响最终地质聚合物性能的新知识。主要目标是研究不同类型的增强纤维对地质聚合物性能的影响。这些增强纤维主要是环保材料，可作为普通硅酸盐水泥的替代品。作者使用粉煤灰和河砂作为基体的原材料，并添加碳纤维（CF）、亚麻纤维（FF）或两者的混合物（CFM）作为增强材料。通过混合、浇筑和养护制备样品，然后进行各种测试。使用的主要研究方法包括抗压强度（CS）、抗折强度（FS）、吸水率（WA）、耐磨性（博姆盘法）、微观结构分析（SEM）、化学成分分析（XRF）和晶体结构分析（XRD）。结果表明，纤维的添加部分改善了地质聚合物的力学性能，并减少了微裂纹。CF增强的地质聚合物表现出最高的抗压强度，而FF增强的地质聚合物吸水率最低。作者还基于先前的研究讨论了影响纤维与基体粘结的因素以及地质聚合物的最佳纤维含量。
