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All Journal FROPIL (Forum Profesional Teknik Sipil) JUTEKS - Jurnal Teknik Sipil Media Ilmiah Teknik Sipil Jurnal Pensil : Pendidikan Teknik Sipil Menara: Jurnal Teknik Sipil Publikasi Riset Orientasi Teknik Sipil (Proteksi)
Lukas, Alva Yuventus
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Civil Engineering, Building, Construction & Architecture Education Engineering Environmental Science Materials Science & Nanotechnology Transportation Other

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Pengaruh Penambahan Superplasticizer Pada Beton Dengan Limbah Egg Tray Terhadap Kuat Tekan Beton Untuk Pembuatan Beton Ramah Lingkungan Rafael, Jusuf Wilson Meynerd; Lukas, Alva Yuventus; Mata, Abia Erasmus; Daga, Welem MWL
JUTEKS : Jurnal Teknik Sipil Vol 7 No 2 (2022): JUTEKS (Jurnal Teknik Sipil)
Publisher : P3M- Politeknik Negeri Kupang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32511/juteks.v7i2.885

Abstract

Penambahan superplasticizer diberikan dalam campuran beton dengan limbah egg tray sebagai pengganti agregat halus dengan persentase penggantiannya sebesar 3% untuk 6 variasi penambahan superplasticizer yaitu 0%, 0.5%, 1%, 1.5%, 2% dan 5%. Hasil pengujian kuat tekan beton pada umur 7 hari untuk setiap benda uji berturut-turut sebesar 9.75 MPa, 14.50 MPa, 19.77 MPa, 20.63 MPa, 12.27 MPa dan 11.90 MPa. Pada umur beton mencapai 28 hari diperoleh nilai kuat tekan rata-rata untuk setiap benda uji sebesar 14.46 Mpa, 19.52 MPa, 21.74 MPa, 23.00 MPa, 15.31 MPa dan 13.32 MPa. Hal ini menunjukkan bahwa penambahan superplasticizer dalam beton dengan limbah egg tray dapat meningkatkan nilai kuat tekan sampai dengan penambahan sebesar 1.5% superplasticizer. Semakin bertambahnya persentase superplasticizer dapat menurunkan nilai kuat tekan beton dengan limbah egg tray baik pada umur 7 hari maupun umur 28 hari. Walaupun demikian, nilai kuat tekan beton yang dihasilkan masih lebih tinggi dibandingkan tanpa penambahan superplasticizer.
Kajian Laboratorium Sika Viscocrete Pada Beton Normal Menggunakan Agregat Kasar Batu Karang Lukas, Alva Yuventus; Rafael, Jusuf Wilson Meynerd; AR, Zulfiani
PUBLIKASI RISET ORIENTASI TEKNIK SIPIL (PROTEKSI) Vol 6 No 1 (2024): Vol. 6 No.1 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/proteksi.v6n1.p1-10

Abstract

Coral limestone oleh masyarakat Nusa Tenggara Timur disebut Batu Karang adalah batuan yang tersebar diseluruh Pulau Timor terkhusus wilayah Kupang Barat, namun potensinya tidak termanfaatkan baik untuk kebutuhan industri konstruksi, hanya sebatas bahan pengisi untuk pekerjaan pondasi. Sedangkan superplasticizer adalah aditif yang memiliki efek mengurangi air dan meningkatkan workability campuran beton, sehingga kekuatan beton dapat meningkat. Penelitian yang dilakukan sebelumnya menunjukan 25% batu karang menggantikan kerikil tanpa superplasticizer menghasilkan nilai kuat tekan beton hingga fc’ = 33 Mpa, namun belum adanya data terkait nilai kuat tekan beton yang menggunakan superplasticizer, sehingga diperlukan pengembangan penelitian penggunaan coral limestone, dengan inovasi penambahan superplasticizer. Tujuan penelitian adalah untuk mengetahui kuat tekan beton menggunakan superplasticizer Sika ViscoCrete-3115N serta hubungan pengaruh penambahan superplasticizer yang tepat terhadap nilai kuat tekan beton tersebut. Metode penelitian bersifat experiment laboratorium dengan variasi superplasticizer 0%, 0,3%, 0,5%, 0,8%. Hasil penelitian menunjukan penggunaan Superplasticizer Sika Viscocrete-3115N memberikan peningkatan nilai kuat tekan beton diusia 28 hari sebesar 24,72 Mpa, 25,86 Mpa, dan 26,23 Mpa, namun peningkatannya lebih kecil dari benda uji tanpa menggunakan superplasticizer
Kajian Laboratorium Kuat Tarik Belah Beton Egg Tray Dengan Penambahan Superplasticizer: Laboratory Study Of Split Tensile Strength Of Egg Tray Concrete With The Addition Of Superplasticizer Rafael, Jusuf Wilson Meynerd; Lukas, Alva Yuventus
Media Ilmiah Teknik Sipil Vol. 12 No. 3 (2024): Media Ilmiah Teknik Sipil
Publisher : ​Institute for Researches and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/mits.v12i3.6104

Abstract

Using egg tray waste as a fine aggregate substitute can be an alternative for making environmentally friendly concrete. The weaknesses of concrete with egg trays can corrected by adding a superplasticizer to both the compressive strength and split tensile strength of the concrete. This study used an egg tray waste as a fine aggregate substitution of 3% with variations in superplasticizer content. The test specimens were by a concrete cylinder with a diameter of 15 cm and a height of 30 cm, which varied the superplasticizer content by 0%, 0.5%, 1%, 1.5%, 2%, and 5% compared to normal concrete conditions. The test results show that concrete given a 3% egg tray waste as a substitute for fine aggregate has a lower split tensile strength value than normal concrete. Adding superplasticizer material can increase the value of split tensile strength up to 1% superplasticizer content. As the superplasticizer content increases, the value of the split tensile strength will again decrease.
UJI ULTRASONIC PULSE VELOCITY PADA BETON NORMAL YANG MENGGUNAKAN BATU KARANG SEBAGAI PENGGANTI KERIKIL Lukas, Alva Yuventus; Rafael, Jusuf Wilson Meynerd
Menara: Jurnal Teknik Sipil Vol. 19 No. 1 (2024): Menara : Jurnal Teknik Sipil
Publisher : Teknik Sipil, Fakultas Teknik Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jmenara.v19i1.35591

Abstract

Meluasnya penggunaan beton dalam konstruksi bangunan mengakibatkan kebutuhan lebih banyak pada bahan penyusun beton. Masalah yang timbul, turunnya jumlah material penyusun beton yaitu kerikil. Pecahan batu karang atau crushed coral limestone adalah salah satu alternatif yang dapat digunakan untuk mengatasi hal tersebut. Tujuan penelitian adalah untuk mengetahui kualitas beton menggunakan batu karang sebagai pengganti kerikil pada variasi 5%, 25%, 50%. dan pengaruh umur beton, mutu beton dan prosentasi batu karang terhadap kecepatan rambat gelombang menggunakan UPV. Metode penelitian adalah experimen laboratorium. Kesimpulan penelitian adalah batu karang pulau timor dengan prosentasi 25% dapat digunakan sebagai material alternatif pengganti kerikil dengan rata-rata gelombang UPV 4,56 km/s dan usia beton 28 hari, menunjukan kualitas beton berada pada kategori “bagus” dan koefisien variasi pada kategori “sangat bagus (excelent)”. Sedangkan pada penambahan batu karang sebesar 5% dan 25%, terjadi peningkatan kecepatan gelombang UPV, dan menurun pada variasi 50%, penggunaan batu karang.
INVESTIGATION OF THE COMPRESSIVE STRENGTH OF CORAL AGGREGATE CONCRETE USING CORALLINE LIMESTONE AS COARSE AGGREGATE Lukas, Alva Yuventus; Rafael, Jusuf W. M.; Making, Maria Y. M.; Wuwur, Dewi A. I.
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 14 No. 2 (2025): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v14i2.54385

Abstract

Utilization coral limestone aggregate as a sustainable alternative in the construction industry has become critical in order to reduce reliance on traditional aggregates. Previous research Lukas A. Y, et al. revealed that concrete with fine aggregate of zone IV gradation and coarse aggregate coralline limestone replacing 25% coarse aggregate gravel can raise compressive strength concrete to 33.37 MPa. It is predicted that fine aggregate with a zone IV gradation, which has small particle sizes, will fill voids in concrete, enhancing its strength. However, increasing coralline limestone component to 50% reduces concrete compressive strength. This suggests that macroscopically, fine particles of zone IV grading have yet to make a significant contribution to increase in concrete compressive strength. Therefore, the current study attempts to optimize concrete mix employing fine aggregate with zone II gradation and its impact on concrete compressive strength. Meanwhile, study employs a laboratory experimental test for compressive strength and ultrasonic pulse velocity, with a target concrete compressive strength of 30 MPa. Study found concrete with coralline limestone content of 0%, 5%, 25%, 50%, and 75%, as well as fine aggregate from zone II grading, had 28-days compressive strengths of 20.27 MPa, 22.10 MPa, 23.80 MPa, 24.42 MPa, and 18.19 MPa. Fine aggregate in Grading Zone II reduces concrete strength.
ANALISIS DAN PERANCANGAN CAMPURAN BETON MENGGUNAKAN AGREGAT DARI QUARRY NOEMUTI KABUPATEN TTU Alokabel, Koilal; Rafael, Jusuf Wilson Meynerd; Suwito, Abdul Syukur Hadi; Lukas, Alva Yuventus
FROPIL (Forum Profesional Teknik Sipil) Vol 11 No 1 (2023): FROPIL (Forum Profesional Teknik Sipil)
Publisher : Jurusan Teknik Sipil Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/fropil.v11i1.4576

Abstract

The selection of local materials in the manufacture of concrete always sought to be used for the convenience of the manufacturing process and the availability of materials. The local material must refer to the terms and conditions that meet the achievement of the expected concrete quality. In this study, materials originating from the Noemuti Quarry, TTU Regency, namely fine aggregate and coarse aggregate, were used as concrete constituent materials with a planned compressive strength target of 25 MPa. Cylindrical specimens with a diameter of 15 cm and a height of 30 cm were made and treated for testing to the compressive strength of concrete. The results of the material characteristics test showed that the fine and coarse aggregates fulfilled the terms and conditions of concrete constituents. The results of the unit weight test show that the concrete is included in the normal concrete category because the unit weight obtained ranges from 2200 – 2500 kg/m³. The result for the compressive strength test of the concrete, aged 7 days, obtained a compressive strength of 22.65 MPa. For ages 21 days, the compressive strength of concrete is 25.42 MPa, and for ages 28 days, it reaches 26.67 MPa. Thus, the aggregate from the Noemuti Quarry, TTU Regency, both fine and coarse aggregate, is suitable for making normal concrete with a compressive strength of 25 MPa.
Co-Authors Alokabel, Koilal AR, Zulfiani Daga, Welem MWL Making, Maria Y. M. Mata, Abia Erasmus Rafael, Jusuf W. M. Rafael, Jusuf Wilson Meynerd SUWITO, ABDUL SYUKUR HADI Wuwur, Dewi A. I.