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All Journal Jurnal Teknik Industri Terintegrasi (JUTIN)
Dennies Marcelino Assa
STT MIGAS Balikpapan
Decision Sciences, Operations Research & Management Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Penambahan Aditif Boraks terhadap Compressive Strength dan Shear Bond Strength Semen Pemboran Kelas G Kevin Patrick Kumambouw; Baiq Maulinda Ulfah; Dennies Marcelino Assa
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 3 (2026): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i3.61081

Abstract

This study analyzes the effect of adding borax (sodium tetraborate) as a retarder additive on both parameters, using concentration variations of 0%, 0.25%, 0.5%, and 1% BWOC at a fixed water-cement ratio of 0.44. Testing was performed with a hydraulic press after 24 hours of curing. Compressive strength rose from 654.2 psi (0%) to 1,122.3 psi (0.25%) and peaked at 1,421.1 psi at 0.5%, before dropping sharply to 525.6 psi at 1%. Shear bond strength followed a similar pattern: 144.5 psi (0%), 233.6 psi (0.25%), 295.7 psi (0.5%, the highest value), and 127.3 psi at 1%. A concentration of 0.5% BWOC proved to be the optimum point, while excess borax triggered over-retardation that hindered C-S-H formation and reduced cement strength
Analisis Komprehensif Injeksi Biopolimer Xanthan Gum (XCD) pada Model Fisik Sandpack untuk Optimasi Enhanced Oil Recovery Dennies Marcelino Assa; Baiq Maulinda Ulfah
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 3 (2026): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i3.61084

Abstract

Preparation of XCD solution using 2.50 g of XCD powder and 500 mL of distilled water mixed with a magnetic stirrer at a speed of 1000 rpm for XCD solution viscosity value is 18.15 cP and density of XCD solution is 1.875 g/mL. Injecting the XCD solution using a syringe pump in order to get a stable rate when pushing fluid from inside the sandpack, water flooding is done first to see the sealing power in the sandpack with a recovery factor obtained of 90%. With 250 mL of XCD solution injected, it can push out 31 mL of light oil trapped in the sandpack and get a recovery factor of 98% from the sandpack. Sweep efficiency of water and XCD flooding obtained is 0.89 where the mobility ratio value (M < 1) is very good sweep efficiency that works and if the mobility ratio (M > 1) sandpack conditions have been damaged such as water fingering in the sandpack.
Co-Authors Baiq Maulinda Ulfah Kevin Patrick Kumambouw