Bio-based fibres for use in cement composite materials

Abstract

Concrete is one of the most widely utilized construction material due to its versatility and is employed in various applications in the construction sector. It has several beneficial characteristics including high compressive strength, fire resistance and durability. However, concrete also has its drawbacks such as poor tensile strength, brittleness and weak crack resistance. Thus, fibre reinforcements are introduced in cement-based materials to improve its toughness and ductility and to control cracks [1]. The invasive Agave plant has been rapidly spreading in the Maltese islands, displacing native species and potentially harming local structures and biodiversity. Extensive removal efforts have been undertaken, but the disposal of these alien species through incineration poses a significant environmental challenge [2]. To mitigate this issue, it is crucial to utilize this by product in an innovative and sustainable way that contributes to a more circular and sustainable economy. This study investigates the potential use of Agave Sisalana fibres in self-compacting concrete (SCC) and their impact on its fresh properties, early age characteristics and hardened properties of concrete. The influence of different fibre lengths, specifically 15mm, 25mm and 35mm, with various fibre volume percentages of 0.25%, 0.50% and 1%, were considered as indicated in Table 1. To evaluate the performance of the concrete specimens, experimental tests were conducted to assess the compressive, flexural, tensile and shrinkage behaviour.