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All Journal Jurnal Rekayasa Teknik Sipil dan Lingkungan Jurnal Teknik Sipil Macca
Harsan, Harsan Ingot Hasudungan
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Pemanfaatan Limbah Pertanian Abu Bonggol Jagung untuk Meningkatkan Kinerja Beton Self-Compecting Concrete (SCC) Terhadap Kuat Tekan dan Flowability di Distrik Muara Tami Kota Jayapura Harsan, Harsan Ingot Hasudungan; Selni Prawardani, Dinda Sekar
Jurnal Teknik Sipil MACCA Vol. 10 No. 3 (2025): Jurnal Teknik Sipil MACCA (OKTOBER 2025)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33096/g1p8cf35

Abstract

Penelitian ini memanfaatkan abu bonggol jagung sebagai bahan tambahan (admixture) atau pengganti sebagian semen pada beton Self-Compacting Concrete (SCC). Abu hasil pembakaran bonggol jagung mengandung silika yang berpotensi sebagai bahan pozzolan. Limbah ini banyak dihasilkan di Distrik Muara Tami, Kota Jayapura, namun belum dimanfaatkan secara optimal. Penelitian bertujuan mengevaluasi pengaruh abu bonggol jagung terhadap kuat tekan dan flowability beton SCC. Variasi kadar abu bonggol jagung yang digunakan adalah 0%, 5%, 10%, 15%, dan 20% terhadap berat semen. Pengujian meliputi uji slump flow dan T500 flowability untuk menilai kelecakan beton, serta uji kuat tekan pada umur 7 dan 28 hari. Hasil menunjukkan bahwa penambahan hingga 15% masih memenuhi kriteria SCC normal, sedangkan campuran 20% bersifat lebih kaku. Waktu sebar (T500) seluruh campuran berada dalam rentang normal 2,5–4,9 detik. Kuat tekan optimum diperoleh pada campuran 5% abu bonggol jagung dengan nilai 36,6 MPa pada umur 7 hari dan 48,9 MPa pada umur 28 hari. Kadar abu di atas 15% menurunkan kuat tekan secara signifikan.
UTILIZATION OF CORN COB ASH AGRICULTURAL WASTE TO IMPROVE THE PERFORMANCE OF SELF-COMPECTING CONCRETE (SCC) ON COMPRESSIVE STRENGTH AND FLOWABILITY IN MUARA TAMI DISTRICT, JAYAPURA CITY Harsan, Harsan Ingot Hasudungan
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 2 (2025): Vol. 6 No. 2 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, OKTOBER 2025,
Publisher : UKI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cen.v6i2.7404

Abstract

Utilization of agricultural waste corn cob ash as an admixture or partial cement substitute in self-compecting concrete (SCC) concrete mixtures. Burned corn cobs produce ash with silica content that has the potential as a pozzolan material. This waste is widely produced by farmers in Muara Tami District, Jayapura City, but has not been optimally utilized. This study aims to evaluate the effect of corn cob ash on two main aspects of SCC concrete, namely compressive strength and flowability. The methodology used includes making concrete mixtures with varying levels of corn cob ash of 0%, 5%, 10%, 15%, 20% as a partial cement substitute, followed by laboratory tests on the mechanical properties and workability of the concrete. Based on the test results, it can be concluded that the SCC concrete mixture with the addition of corn stalk ash (ABJ) up to 15% is still classified as normal SCC concrete based on the slump flow test, while the 20% ABJ mixture shows rather stiff properties and is less ideal for use as SCC concrete. The T500 flowability test shows that all mixtures, from 0% ABJ to 20% ABJ, have a spread time that is still within the normal range, namely between 2.5 and 4.9 seconds, thus meeting the flowability criteria for SCC concrete. In terms of compressive strength, the 5% ABJ mixture gives the best results, namely 36.6 MPa at 7 days and 48.9 MPa at 28 days, making it the most recommended mixture for use in SCC concrete structures. Conversely, the 20% ABJ mixture shows a significant decrease in compressive strength, making it less suitable for structural applications. Keywords: Self-compacting concrete (SCC); Corncob Ash; Slum Flow; Flowability; Compressive Strength
Co-Authors Selni Prawardani, Dinda Sekar