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Gunaedy Utomo
Universitas Balikpapan
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences Transportation

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Influence Plastic Polyethylene Terephthalate as Strong Adhesive Press Paving Block Rosalin Delia; Gunaedy Utomo; Andi Marini Indriani
Potensi: Jurnal Sipil Politeknik Vol. 27 No. 1 (2025): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v27i1.6342

Abstract

As the population growth and human needs rise, the amount of plastic product waste was increase. Polyethylene Terephthalate (PET) plastic waste is difficult to naturally decomposed, but it can be recycled by using it as a mixture for paving blocks. Paving blocks, commonly utilized in urban infrastructure, present an opportunity for incorporating recycled materials, addressing environmental concerns while maintaining structural integrity. Therefore, this study aims to assess the effectiveness of PET as adhesive and partial replacement for cement in paving block mixtures. Compressive strength was conducted according to SNI 03-0691-1996 standards on paving block containing PET plastic. The experimental test was conducted at the Civil Engineering laboratory of Balikpapan University. The test was carried out using three different mixture compositions, including 30% PET : 70% sand, 40% PET : 60% sand, and 50% PET : 50% sand. The compressive test result showed that mixture of 30% PET: 70% sand produced the highest average compressive strength of 15.87 MPa, which meets the C quality standard and is suitable for pedestrian use. Meanwhile, a mixture of 50% PET: 50% sand produced an average compressive strength of 10.0 MPa, which meets the D quality and is suitable for parks and other uses.
The Effect of Land Slopes Covered with Paving Blocks on Rainwater Infiltration Andi Marini Indriani; Gunaedy Utomo
Jurnal Penelitian Pendidikan IPA Vol 12 No 1 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i1.12668

Abstract

Rapid urban development has increased impervious surface coverage, causing higher surface runoff and reduced rainwater infiltration that contribute to flooding and groundwater depletion. Permeable pavement systems, such as paving blocks, are widely applied to support sustainable urban water management. This study analyzes the effect of land slope covered with hexagonal paving blocks on rainwater infiltration performance. Laboratory experiments were conducted using a rainfall simulator with a constant intensity of 50 mm/h. Three slope variations were evaluated, namely 0%, 2%, and 4%. The paving blocks had a compressive strength of 25 MPa (Class B) and were installed on a compacted sandy bedding layer. Infiltration and surface runoff volumes were measured at five-minute intervals until stable conditions were achieved. Results indicate that land slope significantly influences infiltration behavior. The highest infiltration performance occurred at a 2% slope, with a maximum infiltration volume of approximately 570 mL recorded between the 40th and 45th minutes. Conversely, the 0% slope showed decreased infiltration due to soil saturation, while the 4% slope exhibited lower efficiency because the increased slope accelerated surface runoff. These findings demonstrate that hexagonal paving blocks installed on a moderate slope enhance infiltration, reduce runoff, and support urban flood mitigation and groundwater recharge.
Pengaruh Metode Pendinginan Pasca Bakar Terhadap Perubahan Kuat Tekan Bata Ringan I Gede Ngurah Swasti; Andi Marini Indriani; Gunaedy Utomo
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.3346

Abstract

This study is motivated by the increasing use of lightweight bricks as a modern construction material due to their advantages, including low weight, good thermal insulation, and ease of installation. Foam agent-based lightweight bricks are made from a mixture of fine aggregate from Muara Samu sand, cement, water, and an air-foaming agent. The problem examined in this study is the degradation of material quality due to exposure to high temperatures during fire conditions, which may affect compressive strength. This study aims to determine the effect of burning duration and cooling methods on the compressive strength of lightweight bricks. The method used was a laboratory experiment employing cube specimens with a variation of 8 bar and 2 percent foam agent, which were burned for 20, 40, and 60 minutes. The specimens were then cooled using two methods: without water spraying and with water spraying, followed by compressive strength testing. The results indicate that the initial compressive strength was 1.89 MPa. After burning without water spraying, the compressive strength decreased to 1.53 MPa (20 minutes), 1.34 MPa (40 minutes), and 1.12 MPa (60 minutes). Meanwhile, with water spraying, the compressive strength decreased to 1.47 MPa (20 minutes), 1.28 MPa (40 minutes), and 1.04 MPa (60 minutes). The findings show that the longer the burning duration, the greater the reduction in compressive strength, and that the cooling method using water tends to accelerate the decrease in compressive strength.
Co-Authors Agus Sugianto Agus Sugianto Amanda Syasya Billah Andi Marini Indriani, Andi Marini Eka Al Qurina I Gede Ngurah Swasti Irna Hendriyani Lukman M. Nur Fadhillah Maslina Muhammad Rizqy Nuruddin Kafy El-Ridlo Nurul Fitriyani Olivia Octafiani Rahmat Rahmat Rahmat Rosalin Delia Ryka, Hamriani Siti Nor Aida Sulardi . Yuninda Az’Zahrah Zaerima Zahira Ochtharima