Balea Ana, Fuente Elena, Monte M Concepcion, Blanco Angeles, Negro Carlos
Department of Chemical Engineering and Materials, Universidad Complutense de Madrid, Av. Complutense s/n, 28040 Madrid, Spain.
Materials (Basel). 2021 May 5;14(9):2408. doi: 10.3390/ma14092408.
Reinforcing fibers have been widely used to improve physical and mechanical properties of cement-based materials. Most fiber reinforced composites (FRC) involve the use of a single type of fiber to improve cement properties, such as strength or ductility. To additionally improve other parameters, hybridization is required. Another key challenge, in the construction industry, is the implementation of green and sustainable strategies based on reducing raw materials consumption, designing novel structures with enhanced properties and low weight, and developing low environmental impact processes. Different recycled fibers have been used as raw materials to promote circular economy processes and new business opportunities in the cement-based sector. The valuable use of recycled fibers in hybrid FRC has already been proven and they improve both product quality and sustainability, but the generated knowledge is fragmented. This is the first review analyzing the use of recycled fibers in hybrid FRC and the hybridization effect on mechanical properties and workability of FRC. The paper compiles the best results and the optimal combinations of recycled fibers for hybrid FRC to identify key insights and gaps that may define future research to open new application fields for recycled hybrid FRC.
增强纤维已被广泛用于改善水泥基材料的物理和力学性能。大多数纤维增强复合材料（FRC）使用单一类型的纤维来改善水泥性能，如强度或延展性。为了进一步改善其他参数，则需要进行混杂。在建筑行业，另一个关键挑战是实施绿色和可持续发展战略，包括减少原材料消耗、设计具有增强性能和低重量的新型结构，以及开发对环境影响较小的工艺。不同的回收纤维已被用作原材料，以促进循环经济进程，并在水泥基领域创造新的商业机会。回收纤维在混杂纤维增强复合材料中的宝贵用途已得到证实，它们既能提高产品质量，又能增强可持续性，但所产生的知识是零散的。这是第一篇分析回收纤维在混杂纤维增强复合材料中的应用以及混杂对纤维增强复合材料力学性能和工作性能影响的综述。本文汇总了混杂纤维增强复合材料中回收纤维的最佳结果和最佳组合，以确定关键见解和差距，这些见解和差距可能为未来的研究指明方向，从而为回收混杂纤维增强复合材料开拓新的应用领域。
