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Abstract
Penelitian ini bertujuan untuk mengevaluasi performa lentur radial cangkang pipa dari beton busa polimer yang diperkuat dengan tali polietilen, melalui dua skema pembebanan yang berbeda. Sepuluh spesimen diuji dengan metode Skema 1 (U terbalik tanpa tumpuan tambahan) dan Skema 2 (posisi U dengan dua tumpuan dan pendulum beban) menggunakan Universal Testing Machine (UTM). Parameter yang diamati meliputi tegangan lentur, regangan, dan modulus lentur. Hasil pengujian menunjukkan bahwa Skema 1 menghasilkan nilai tegangan, regangan, dan modulus lentur rata-rata yang lebih tinggi dibandingkan Skema 2. Nilai tegangan lentur tertinggi sebesar 59,73 MPa dan regangan maksimum sebesar 10,33% diperoleh pada spesimen Skema 1. Sementara itu, Skema 2 menunjukkan adanya retakan pada bagian atas spesimen setelah pengujian, sedangkan Skema 1 menunjukkan elastisitas tinggi tanpa retakan. Dari hasil tersebut dapat disimpulkan bahwa konfigurasi pembebanan dan posisi tali penguat berpengaruh signifikan terhadap perilaku lentur cangkang pipa. Beton busa polimer dengan penguat tali polietilen menunjukkan potensi sebagai material alternatif pipa lentur elastis untuk aplikasi struktural ringan.
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References
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References
K. Li, J. Zhang, Y. Wang, and G. Yang, “Flexural behavior of lightweight polyurethane-based concrete with various reinforcement configurations,” Construction and Building Materials, vol. 254, p. 119296, 2020. [Online]. Available: https://doi.org/10.1016/j.conbuildmat.2020.119296
M. M. Reda Taha, M. ElGawady, and A. Marefat, “Mechanical properties of polymer concrete with recycled plastic and fly ash,” Journal of Materials in Civil Engineering, vol. 30, no. 5, pp. 04018073, 2018. [Online]. Available: https://ascelibrary.org/doi/10.1061/(ASCE)MT.1943-5533.0002265
H. R. Tavakoli, M. Heidari, and A. B. Ramli, “Mechanical properties and durability of concrete containing polymer and recycled plastic waste,” Materials Today: Proceedings, vol. 45, pp. 6645–6649, 2021. [Online]. Available: https://doi.org/10.1016/j.matpr.2021.02.417
J. Chen, Y. Liu, H. Sun, and W. Song, “Experimental study on the flexural performance of concrete pipes with polymer additives,” Engineering Structures, vol. 241, p. 112421, 2021. [Online]. Available: https://doi.org/10.1016/j.engstruct.2021.112421
H. Liu, B. Wang, and Y. Fang, “Reinforcement effect of polyethylene fibers on flexural strength and toughness of polymer mortar,” Construction and Building Materials, vol. 144, pp. 451–458, 2017. [Online]. Available: https://doi.org/10.1016/j.conbuildmat.2017.03.174.