NOVA ELIZA, NIM.112022048 (2026) PENGARUH SUBSTITUSI ABU TEMPURUNG KELAPA PADA CAMPURAN BETON TERHADAP KUAT TEKAN. Skripsi thesis, Universitas Muhammadiyah Palembang.

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Abstract

THE EFFECT OF COCONUT SHELL ASH SUBSTITUTION IN CONCRETE MIXTURES ON THE COMPRESSIVE STRENGTH OF CONCRETE Nova Eliza1, Mira Setiawati2, Marice Agustini3 ABSTRACT Nova Eliza/112022048/The Effect of Coconut Shell Ash Substitution in Concrete Mixtures on the Compressive Strength of Concrete Concrete is one of the most widely used construction materials because of its good compressive strength and ease of shaping. However, the use of large amounts of cement can have negative environmental impacts. One alternative is to use coconut shell ash as a partial cement substitute because it contains silica (SiO₂). This study aims to determine the effect of coconut shell ash substitution on the compressive strength of concrete and to determine the optimum substitution level. This experimental study used coconut shell ash substitution levels of 0%, 1.25%, 2.5%, 3.75%, 5%, and 6.25% by weight of cement, with a design concrete strength of fc' 25 MPa. The tests included material characterization, slump testing, X-Ray Fluorescence (XRF) analysis, and compressive strength testing at the age of 28 days. The results showed that normal concrete had an average compressive strength of 25.99 MPa, while the 1.25% and 2.5% substitution levels produced compressive strengths of 26.39 MPa and 26.80 MPa, respectively. At substitution levels of 3.75%, 5%, and 6.25%, the compressive strength decreased to 23.06 MPa, 20.42 MPa, and 19.40 MPa, respectively. Based on these results, the optimum coconut shell ash substitution level was 2.5%, with an increase in compressive strength of 3.12% compared to normal concrete. This indicates that the proper use of coconut shell ash can improve concrete compressive strength while utilizing coconut shell waste as an alternative material. Keywords: Concrete, Coconut Shell Ash, Cement Substitution, Compressive Strength, X-Ray Fluorescence (XRF). PENGARUH SUBSTITUSI ABU TEMPURUNG KELAPA PADA CAMPURAN BETON TERHADAP KUAT TEKAN Nova Eliza1, Mira Setiawati2, Marice Agustini3 INTISARI Nova Eliza/112022048/ Pengaruh Substitusi Abu Tempurung Kelapa Pada Campuran Beton Terhadap Kuat Tekan Beton merupakan salah satu material konstruksi yang banyak digunakan karena memiliki kuat tekan yang baik dan mudah dibentuk. Namun, penggunaan semen dalam jumlah besar dapat berdampak terhadap lingkungan. Salah satu alternatif yang dapat digunakan adalah abu tempurung kelapa sebagai substitusi sebagian semen karena mengandung silika (SiO₂). Penelitian ini bertujuan untuk mengetahui pengaruh substitusi abu tempurung kelapa terhadap kuat tekan beton serta menentukan kadar substitusi optimum. Penelitian ini dilakukan secara eksperimental dengan variasi substitusi abu tempurung kelapa sebesar 0%, 1,25%, 2,5%, 3,75%, 5%, dan 6,25% dari berat semen dengan mutu beton rencana fc' 25 MPa. Pengujian meliputi karakteristik material, slump, X-Ray Fluorescence (XRF), dan kuat tekan beton pada umur 28 hari. Hasil penelitian menunjukkan bahwa beton normal memiliki kuat tekan rata-rata sebesar 25,99 MPa, sedangkan variasi substitusi 1,25% dan 2,5% menghasilkan kuat tekan masing-masing sebesar 26,39 MPa dan 26,80 MPa. Pada variasi 3,75%, 5%, dan 6,25%, kuat tekan mengalami penurunan masing-masing menjadi 23,06 MPa, 20,42 MPa, dan 19,40 MPa. Berdasarkan hasil tersebut, kadar substitusi optimum abu tempurung kelapa adalah 2,5%, dengan peningkatan kuat tekan sebesar 3,12% dibandingkan beton normal. Hal ini menunjukkan bahwa penggunaan abu tempurung kelapa dalam jumlah yang tepat dapat meningkatkan kuat tekan beton dan sekaligus memanfaatkan limbah tempurung kelapa sebagai bahan alternatif. Kata Kunci : Beton,Abu Tempurung Kelapa,Substitusi Semen,Kuat Tekan,XRF

Item Type:	Thesis (Skripsi)
Additional Information:	Pembimbing : 1.Ir.Mira Setiawati,S.T.,M.T. 2.Marice Agustini, S.T.,M.T.
Uncontrolled Keywords:	Kata Kunci : Beton,Abu Tempurung Kelapa,Substitusi Semen,Kuat Tekan,XRF
Subjects:	Teknik Sipil > Bahan-bahan Bangunan
Divisions:	Fakultas Teknik > Teknik Sipil (S1)
Depositing User:	Mahasiswa Fakultas Teknik
Date Deposited:	20 Aug 2026 02:59
Last Modified:	20 Aug 2026 02:59
URI:	http://repository.um-palembang.ac.id/id/eprint/37010

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