Abstract

In recent years, a new type of natural fibre known as fish tail palm fibre (FTPF) has been discovered, and several studies have been conducted to investigate the fibres physiochemical properties, strength attributes and therapeutic capabilities. Because the utilisation of these fibres in the concrete industry is limited, this research aims to employ varying volume fractions of fibres with different fibre length as micro reinforcement in concrete to improve the pre-cracking behaviour and post-peak strength of high-strength concrete composites. Fibre dosage of 0.1% and 0.2% have only minor impact on the slump when compared to 0.3% fibre dosage. The compressive strength of control specimen was 50 MPa (M50). The maximum compressive strength, split tensile strength and flexural strength of FTPF reinforced concrete specimens are 56 MPa, 5.11 MPa and 6.12 MPa, respectively, which was recorded for specimen with 0.2 Volume Fraction (VF) and 30 mm Fibre Length (FL). The increase in the compressive strength, split tensile strength and flexure strength is about 12%, 19% and 20% with the addition of 0.2% VF and 0.3% VF of fibres. Out of nine fibre-reinforced concrete mixes, specimen with 0.2 and 0.3 VF with 30 mm fibre length showed excellent mechanical strength. From the fractional analysis study, it can be concluded that the fibre length has about 40% contribution on the compressive strength of concrete followed by fibre length. When compared to splitting tensile strength, the fibre length and fibre volume fraction have almost equal contribution. In the case of flexural strength, the combined effect of fibre length and fibre volume has a contribution of about 46% in the strength properties of concrete.

摘要

近年来，发现了一种称为鱼尾棕榈纤维 (FTPF) 的新型天然纤维，并进行了几项研究来研究纤维的理化特性、强度属性和治疗能力。由于这些纤维在混凝土工业中的利用有限，本研究旨在采用不同体积分数的不同纤维长度的纤维作为混凝土中的微筋，以改善高强混凝土复合材料的预裂性能和峰后强度. 与 0.3% 的纤维用量相比，0.1% 和 0.2% 的纤维用量对坍落度的影响很小。对照试样的抗压强度为 50 MPa (M50)。FTPF钢筋混凝土试件的最大抗压强度、劈裂抗拉强度和抗折强度分别为56 MPa、5.11 MPa和6。分别为 12 MPa，这是针对具有 0.2 体积分数 (VF) 和 30 mm 纤维长度 (FL) 的样本记录的。添加0.2%VF和0.3%VF的纤维，其抗压强度、劈裂抗拉强度和抗弯强度分别增加了12%、19%和20%。在九种纤维增强混凝土混合物中，VF 为 0.2 和 0.3 且纤维长度为 30 毫米的试样显示出出色的机械强度。从分数分析研究可以得出结论，纤维长度对混凝土抗压强度的贡献约为 40%，其次是纤维长度。与劈裂拉伸强度相比，纤维长度和纤维体积分数的贡献几乎相等。在弯曲强度的情况下，