Evaluasi Sifat Mekanik Lentur Beton Menggunakan Serat Abaka dan Substitusi Abu Cangkang Tiram

Muhammad Iqbal; Bunyamin; Heru Pramanda; Rafiqa Muhnita Yusputri

Authors

Muhammad Iqbal Universitas Iskandar Muda Author
Bunyamin Universitas Iskandar Muda Author
Heru Pramanda Universitas Iskandar Muda Author
Rafiqa Muhnita Yusputri Universitas Syiah Kuala Author

Keywords:

Abu Cangkang Tiram, Kuat Lentur, Limbah, Serat Abaka, Beton

Abstract

Flexural strength is one of the mechanical properties of concrete that is often overlooked in achieving maximum concrete performance. Abaca fiber, a natural fiber, has been widely used to enhance the flexural strength of concrete. However, its utilization remains limited and has never been combined with Oyster Shell Ash (OSA). Therefore, this study aims to determine the density, slump flow, and flexural strength of high-strength concrete with a 5% substitution of OSA, supplemented with 2% superplasticizer and abaca fiber at proportions of 0.15%, 0.30%, and 0.45%, with curing for 28 days. The oyster shells were sourced from Surien, Meuraxa District, Banda Aceh City, while the abaca fibers were obtained from East Java. The experimental design followed the ACI 211.4R-93 (American Concrete Institute) method. The results showed that an excessive addition of abaca fiber reduces the density of concrete. Incorporating 0.15% abaca fiber increases the flexural strength of concrete. The combination of 5% OSA substitution with abaca fiber further improves flexural strength.

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