MU'IZ FERDI IKROMI, NIM 112022122 (2026) ANALISIS MIKROSTRUKTUR BETON MENGGUNAKAN SCANNING ELECTRON MICROSCOPE (SEM) DENGAN SUBSTITUSI ABU TEMPURUNG KELAPA TERHADAP SEMEN. Skripsi thesis, Universitas Muhammadiyah Palembang.

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Abstract

Pemanfaatan abu tempurung kelapa sebagai substitusi semen merupakan salah satu alternatif untuk mengurangi penggunaan semen sekaligus meningkatkan nilai guna limbah pertanian. Penelitian ini bertujuan menganalisis karakteristik mikrostruktur beton dengan variasi substitusi abu tempurung kelapa menggunakan Scanning Electron Microscope (SEM). Penelitian dilakukan secara deskriptif dengan analisis eksperimental terhadap citra SEM yang berfokus pada analisis mikrostruktur dengan memanfaatkan data kuat tekan sebagai data sekunder, sedangkan data primer diperoleh melalui pengamatan SEM pada beton normal serta beton dengan substitusi abu tempurung kelapa sebesar 1,25%; 2,5%; 3,75%; 5%; dan 6,25%. Analisis citra dilakukan menggunakan perangkat lunak ImageJ dan Origin. Hasil penelitian menunjukkan bahwa substitusi abu tempurung kelapa sebesar 2,5% menghasilkan mikrostruktur beton paling padat dan homogen, dengan porositas dan retak mikro lebih sedikit serta distribusi partikel lebih merata. Peningkatan kadar substitusi di atas 2,5% meningkatkan porositas dan retak mikro sehingga kepadatan matriks menurun. Kadar 2,5% menjadi substitusi optimum karena menghasilkan karakteristik mikrostruktur terbaik. The utilization of coconut shell ash as a partial cement replacement is an alternative approach to reducing cement consumption while increasing the utilization value of agricultural waste. This study aims to analyze the microstructural characteristics of concrete with various levels of coconut shell ash substitution using a Scanning Electron Microscope (SEM). The research was conducted descriptively through experimental analysis of SEM images, focusing on microstructural characteristics and utilizing compressive strength data as secondary data. Primary data were obtained through SEM observations of normal concrete and concrete with coconut shell ash substitutions of 1.25%, 2.5%, 3.75%, 5%, and 6.25%. Image analysis was performed using ImageJ and Origin software. The results showed that a 2.5% substitution of coconut shell ash produced the densest and most homogeneous concrete microstructure, characterized by lower porosity and fewer microcracks, as well as a more uniform particle distribution. Increasing the substitution level beyond 2.5% resulted in increased porosity and microcracks, leading to a decrease in matrix density. The 2.5% substitution level was identified as the optimum substitution level because it produced the best microstructural characteristics.

Item Type:	Thesis (Skripsi)
Additional Information:	Pembimbing : 1. Ir. Revisdah, M.T 2. Dr. Verinazul Septriansyah, S.T., M.T
Uncontrolled Keywords:	Abu Tempurung Kelapa, Beton, Mikrostruktur, Scanning Electron Microscope (SEM). Coconut Shell Ash, Concrete, Microstructure, Scanning Electron Microscope (SEM).
Subjects:	Teknik Sipil > Bahan-bahan Bangunan
Divisions:	Fakultas Teknik > Teknik Sipil (S1)
Depositing User:	Mahasiswa Fakultas Teknik
Date Deposited:	10 Sep 2026 02:16
Last Modified:	10 Sep 2026 02:16
URI:	http://repository.um-palembang.ac.id/id/eprint/37344

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