Influence of Hybrid Short Fibres on the Mechanical Performance of Textile Reinforced Concrete Composites
摘要
Textile reinforced concrete composites, an innovative material comprising non-corrosive, high-performance continuous textiles (grids) embedded in a cement-based matrix, have garnered significant attention for their versatility in diverse design and manufacturing applications. TRC composites, despite their high load-bearing capacity, pseudo-ductile behavior, and sustainability, tend to develop wide cracks under ultimate load conditions. This paper aims to optimize crack development and enhance the mechanical performance of TRC composites by investigating the influence of adding short fibres. Specifically, the study explores the role of single and hybrid short fibres—alkali-resistant glass (ARG), polyvinyl alcohol (PVA), and polypropylene (PP)—at a constant volume fraction of 2.0% in the flexural performance of TRC plates. The addition of short fibres significantly improves the flexural performance of TRC plates, with both ARG and PVA fibres consistently enhancing cracking strength and ultimate flexural strength, albeit resulting in slightly lower ultimate flexural strain compared to plates reinforced with short PP fibres. Moreover, hybridizing the short fibres, particularly by combining high Young’s modulus with low modulus fibres, achieves a balanced enhancement of strength and strain capacity while effectively managing costs and reducing emissions.