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All Journal Borneo Engineering: Jurnal Teknik Sipil Indonesian Journal of Construction Engineering and Sustainable Development
Liastary Pradina Febrianty
Universitas Trisakti
Civil Engineering, Building, Construction & Architecture

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ANALISIS KUAT TEKAN DAN KUAT TARIK BELAH PADA BETON DENGAN PENAMBAHAN SERAT SERABUT KELAPA DAN BATU APUNG Ade Okvianti; Liastary Pradina Febrianty
INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD) Vol. 5 No. 1 (2022): Vol. 5 No. 1 (2022): INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAIN
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (446.212 KB) | DOI: 10.25105/cesd.v5i1.13936

Abstract

ABSTRACT The use of added materials from natural as a mixture of concrete is growing and varied. In this study, researchers used coconut fiber and pumice stone (pumice) as a concrete mixture to reduce the weight of the concrete so that it became lighter. This test aims to determine the effect of adding pumice stone as a partial substitution with the addition of coconut fiber on the mechanical characteristics of concrete that is the compressive strength and the split tensile strength of concrete. Pumice, which is as much as 20%, is used as a partial replacement of the weight of coarse aggregate with the addition of coconut fibers which are used at 0%, 0.5%, 1%, 1.5% and 2% of the weight of cement as a mixture in concrete. The test was carried out on cylindrical specimens measuring 100 x 200 mm which included compressive strength and splitting strength at 28 days. From the test results, it was found that the compressive strength decreased from 20.97 MPa for normal concrete without the addition of pumice and fiber to 15.45 MPa for concrete with partial substitution of pumice, while with the addition of the percentage of coconut fibers, the compressive strength obtained was 16.55 MPa, 17.88 MPa, 13.90 MPa and 14.57 MPa. In this study, the split tensile strength was also tested and it was found that the split tensile strength increased successively with the optimum tensile strength in concrete with the addition of 2% coconut fiber, namely 1.78 Mpa. Keywords : Pumice, Concrete, Partial Substitute, Coconut Fiber
Kinerja Mekanis Beton Ringan Menggunakan Serat Sabut Kelapa dan Agregat Batu Apung Ade Okvianti Irlan; Liastary Pradina Febrianty; Muhammad Sofyan
Borneo Engineering: Jurnal Teknik Sipil Vol. 9 No. 3 (2025): Volume 9 Nomor 3 Tahun 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v9i3.511

Abstract

Produksi beton ringan berbasis agregat pumice menawarkan pendekatan yang lebih berkelanjutan untuk mengurangi ketergantungan pada agregat alami sekaligus menurunkan berat struktur. Namun, pengurangan densitas sering diikuti oleh penurunan kinerja mekanis. Penelitian ini meninjau pengaruh substitusi pumice sebesar 20% sebagai agregat kasar dan penambahan serat sabut kelapa (0–2.0%) terhadap slump, densitas, kuat tekan, dan kuat tarik belah beton pada umur 28 hari. Substitusi pumice menurunkan slump dari 120 mm menjadi 100 mm dan mengurangi densitas sebesar 9–13%, sejalan dengan karakter pumice yang ringan dan berpori. Penambahan serat menurunkan kelecakan tetapi tetap dalam batas kerja beton struktural. Kuat tekan menurun dari 18,78 MPa menjadi 13,37 MPa akibat penggunaan pumice, namun meningkat kembali pada kadar serat 0,5% sebelum kembali menurun pada dosis lebih tinggi. Sebaliknya, kuat tarik belah meningkat stabil dari 1,22 MPa hingga 1,84 MPa, menunjukkan efektivitas mekanisme bridging serat dalam menahan retak. Analisis ANOVA menegaskan pengaruh signifikan variasi campuran terhadap kedua parameter mekanis. Evaluasi multikriteria menunjukkan bahwa PA20–F1.0 dan PA20–F1.5 memberikan performa paling seimbang. Hasil ini menunjukkan bahwa kombinasi pumice dan serat sabut kelapa efektif menghasilkan beton ringan dengan ketangguhan lebih baik
Co-Authors Ade Okvianti Irlan, Ade Okvianti Muhammad Sofyan