Andi Yusra, Muttaqin Hasan, Husni Husin, Teuku Budi Aulia, Baharuddin, Syahril Ramadhan, Fachruddin, Sanusi
The use of hemp fibre can enhance both the compressive and tensile strength of concrete, while also improving its ductility. Additionally, shell ash contains calcium compounds that contribute to the overall properties of concrete. Therefore, this study aimed to measure the compressive and tensile strengths of concrete, along with examining the chemical functional groups of hemp fibre. To achieve this, hemp fibre (as an additive) and 6% shell ash (as a filler) were incorporated into the concrete mixture, targeting a design strength of 25 MPa. The results revealed that, after 28 days, the average compressive strength of concrete reached a minimum value of 25.668 MPa with 0.5% fibre and a maximum strength of 33.446 MPa with 1.5% fiber. In the split tensile strength test conducted after 28 days, the concrete exhibited a minimum value of 1.982 MPa and a maximum of 2.831 MPa. These findings indicate that adding approximately 1.5% hemp fiber to concrete improved the compressive strength by 4.74% and the split tensile strength by 3.47% compared to conventional concrete. Furthermore, the FTIR test revealed that the shape of the wavelength spectrum diagram and the area of chemical bond peaks were consistent among hemp, plastic, and other natural fibres. © 2024 Trans Tech Publications Ltd, All Rights Reserved.
Department Civil Engineering, Teuku Umar University, Meulaboh, Indonesia; Department Civil Engineering, Syiah Kuala University, Banda Aceh, Indonesia; Department Chemical Engineering, Syiah Kuala University, Banda Aceh, Indonesia
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