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Utilization of Shell Waste as Fine Aggregate in K225 Quality Concrete Utomo, Satriyo; Rahmasari, Puspita; Supardi, Iwan; Riyanti, Eva; Robert
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 5 No. 4 (2026): IJRVOCAS - Special Issues - Hybrid International Conference on Construction, Ma
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v5i4.307

Abstract

Conventional concrete materials derived from natural resources cause environmental problems. This encourages the development of concrete using recycled materials for sustainability reasons. One such material is shellfish, which is used to replace aggregates in concrete, both fine and coarse aggregates. This study conducted an experimental study using shellfish waste as a fine aggregate in a concrete mixture. Utilization of shellfish waste not only reduces environmental problems but can also provide economic value to construction, as well as an effort to conserve natural resources. Shellfish waste was obtained from the coast of Mempawah Regency. The planned test specimens were 15x15x15 cm cubes with a target quality of K225 kg/cm². The test specimens were made with a composition of sand with shellfish sand in proportions of 0%, 5%, 7%, 9%, and 100%. Physical properties of shellfish sand were tested, slump tests were conducted to determine the effect of shellfish sand on concrete viscosity, and concrete compression tests were conducted at the age of 28 days to determine the effect of shellfish sand on concrete strength. The compressive strength test results with 0% substitution = 246.22 kg/cm² or 24.15 MPa. 5% substitution = 211.98 kg/cm² or 20.79 MPa, resulting in a 5.79% decrease in quality. 7% substitution = 195.10 kg/cm² or 19.3 MPa, resulting in a 13.29% decrease in quality. 9% substitution = 176.14 kg/cm² or 17.27 MPa, resulting in a 21.72% decrease in quality. 100% substitution = 155.56 kg/cm² or 15.25 MPa, resulting in a 30.86% decrease in quality. The greater the substitution of the shell sand mixture, the greater the decrease in quality.
Co-Authors Ahmad, Muhammad Taufik Habibillah Ibnu Bondan, Vinsensius Burhan Sidabariba CHRISTOFEL L. G. H. M SAMOSIR Christopher Gustikho david Edy Ikhsan Effendy, Dudy Eka Prasetia Hati Baculu, Eka Eva Syahfitri Nasution, Eva Syahfitri Geby Gosal Georgerius Graceallah Heryanto Iwan Supardi Jan Christian Zherman Saragih, George Johanes Terang Kita Perangin Angin Joiverdia Arifiyanto Juvian Khowira, Mario Lubis, Tri Murti Magfira Malik Mahmul Siregar MAHMUL SIREGAR Manurung, Doni Freddi Mhd. Yamin Michelle Lucky Madelene. S Mochtar Indra Efendi Siregar Muh Anzar Muhammad Adli Fahmi Lubis Nasution, Siti Nurahmi Nur Iftita Rini Nur Safitri Obaja Capandi Saut Horas Sinaga Octara Pribadi Patricia, Verent Purba, Hadyan Yunhas Purba, M. Hadyan Yunhas Rahmasari, Puspita Riyanti, Eva Rosnidar Sembiring Saludin Muis Sarpawi Siallagan, Agnes Angelina Siti Dzahra Sri Hera Wati Sukarja, Detania Sunarmi Syahrial Akbar Tanjung, Muhamamd Dafi Utomo, Satriyo William Widjaja Wilson Winda Asry Wong, Leon Yohanes Ari Setiawan