Abstract
This paper presents the mechanical behaviour of pineapple leaf fibre (PALF) in oil palm shell (OPS) lightweight concrete (LWC). Various fibre volume fractions were considered which include 0.5%, 1.0%, 1.5% and 2.0% of PALF. In this study, the PALF was extracted and treated with sodium hydroxide solution with a 10% concentration. The length of the PALF was made constant as 40 mm based on the optimum fibre length obtained from previous work. The experimental testing in this work includes slump test, compressive strength test, splitting tensile test and four-point bending test. Results showed that the compressive strength decreased at all ages with an increase in PALF volume fraction, whereas improvement in strength was observed in both splitting tensile strength and flexural strength. The inclusion of PALF increases the tensile and flexural strength up to 3.28 MPa and 6.55 MPa respectively. The findings revealed that 1.0% PALF is the optimum fibre volume ratio for tensile and flexural strength. The oven-dry density and demoulded density of all OPS concrete mixes fall within the range of 1526–1731 kg/m3 and 1787–1853 kg/m which are in the range of structural lightweight concrete. The splitting tensile strength of OPS and PALF reinforced OPS-LWC in this study falls in the range to that of conventional concretes. Flexural strength to compressive strength ratio showed that all PALF reinforced OPS concretes had ratios ranging 12–22% which were greater than the usual range for lightweight aggregate concrete. Hence, this indicates that PALF fibre can improve significantly the flexural strength of OPS lightweight concrete.
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Acknowledgements
This research is supported by the internal grant of Universiti Malaysia Pahang PGRS 200375. The authors would like to acknowledge the Centre for Research in Advanced Fluid and Processes (Fluid Centre) and the Faculty of Civil Engineering Technology, Universiti Malaysia Pahang for the equipment and facilities provided.
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Chin, S.C., Tang, M.L., Bakar, N., Che, J.L., Doh, S.I. (2023). Effects of Pineapple Leaf Fibre as Reinforcement in Oil Palm Shell Lightweight Concrete. In: Johari, N.H., Wan Hamzah, W.A., Ghazali, M.F., Setiabudi, H.D., Kumarasamy, S. (eds) Proceedings of the 2nd Energy Security and Chemical Engineering Congress. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-4425-3_6
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