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All Journal Jurnal Lentera Pendidikan Pusat Penelitian LPPM UM Metro Jurnal Suluh Pendidikan Literasi: Jurnal Pengabdian Masyarakat dan Inovasi Jurnal Tatsqif Jurnal Konstruksi dan Infrastruktur : Teknik Sipil dan Perencanaan Journal of Research and Inovation in Civil Engineering as Applied Science Jurnal Inovasi Pendidikan Sains dan Terapan JEAS Dinamika Teknik Sipil: Majalah Ilmiah Teknik Sipil Jurnal Penelitian Pendidikan Journal of Green Science and Technology
Kamil, Firmanilah
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Physics Social Sciences Transportation Other

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Journal : journal of green science and technology

 1 
Material Testing for The Development of Environmentally Friendly Concrete With Conventional Aggregate Substitutes Kamil, Firmanilah; Purnomo, Julyan
Journal of Green Science and Technology Vol 8 No 2 (2024): Journal of Green Science and Technology Vol.8 No.2 September 2024
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v8i2.9577

Abstract

In Ketapang District, there is potential to reduce the environmental impact of concrete production by utilizing local agricultural waste. This study aims to determine the comparison between the physical properties of coconut fiber and palm kernel shells as aggregate substitutes in concrete, with the physical properties of conventional aggregates such as sand and crushed stone. Coconut coir came from tourism waste in Ketapang Regency, while palm kernel shells were taken from the waste of the local palm oil processing industry. Laboratory tests were conducted to compare the physical properties of coconut fiber and palm kernel shell with conventional aggregates, namely sand and crushed stone. The test results showed significant differences. Coconut husk had a specific gravity of 1.19 and palm kernel shell 1.59, compared to sand 2.09 and crushed stone 2.81. The moisture content of palm kernel shell (17.40%) was much higher than that of crushed stone (1.15%), while the water absorption of palm kernel shell reached 37.16%, far above the water absorption of crushed stone (4.05%). Coconut husk and palm kernel shell have lower specific gravity than conventional aggregates, making them ideal for lightweight concrete. However, the high water absorption of palm kernel shells requires adjustments to the concrete mix design. This study shows that the use of local waste materials can contribute to the development of environmentally friendly concrete, but careful composition control is required to maintain concrete performance. Keyword: aggregate, concrete, material testing.
Utilization of Power Plant and Agricultural Waste as A Cement Substitute on The Compressive Strength of Environmentally Friendly Concrete purnomo, julyan; kamil, firmanilah
Journal of Green Science and Technology Vol 9 No 1 (2025): Journal of Green Science and Technology Vol. 9 No. 1 March 2025
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i1.9619

Abstract

This study aims to assess the effect of using Fly Ash and Rice Husk Ash as cement substitutes in the manufacture of environmentally friendly concrete. Fly Ash, a waste from coal-fired power plants, and Rice Husk Ash, an agricultural waste, were used as partial cement substitutes in four concrete mix variations, viz: normal concrete without substitution (N), concrete with 20% Fly Ash (K), concrete with a combination of 10% Fly Ash and 10% Rice Husk Ash (L), and concrete with 20% Rice Husk Ash (M). The compressive strength test was conducted at the age of 7 days, 14 days, and 28 days. The results showed that concrete with 20% Fly Ash (K) produced the most optimal compressive strength, especially at longer concrete ages. Concrete with Rice Husk Ash substitution (M) and a combination of Fly Ash and Rice Husk Ash (L) showed lower compressive strength than normal concrete (N) and Fly Ash alone. Therefore, the use of Fly Ash at 20% gave the best compressive strength results among the variations tested. Keyword: Cement Substitution, Compressive Strength, Eco-friendly concrete, Fly Ash, Rice Husk Ash
The Effect of Adding Wire Mesh on the Compressive Strength of Concrete Using Peat Water and Sea Water Faisal, M.Hanif; Kamil, Firmanilah; Purnomo, Julyan
Journal of Green Science and Technology Vol 10 No 1 (2026): Journal of Green Science and Technology Vol. 10 No.1 March 2026
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v10i1.10884

Abstract

Concrete is a widely used construction material due to its strength and durability, but its quality is greatly influenced by its constituent materials and the environment. In West Kalimantan, people use scrap wire from building demolition as an additive in concrete, while clean water is limited, so peat water or seawater is often used as a mixer. This study aims to determine the effect of wire mesh usage and mixing water type on concrete compressive strength at 7, 14, and 28 days. Test specimens in the form of cubes were made with variations: normal concrete (clean water), concrete with peat water, concrete with seawater, and concrete with 1% wire mesh added to each type of water, and compressive strength testing was conducted using a compression testing machine. The results showed that peat-water concrete achieved the highest strength (119.50, 207.37, and 247.73 kg/cm² at 7, 14, and 28 days), seawater concrete produced the lowest (92.87, 182.27, and 225.90 kg/cm²), and the addition of 1% wire mesh increased early-age strength up to 186.57 kg/cm² at 7 days but its effect diminished at later ages. Thus, the type of mixing water plays a dominant role in concrete quality, while steel tie wire  is more effective in increasing strength during the early stages of hardening.
Co-Authors Alan Putranto Darmanto, Darmanto Dian Wahyuni Dwi Hastuti, Ningrum Efendi, Uti Rustam Faisal, M.Hanif Firza, Muhammad Hanif Faisal, Muhammad Harahap, Saima Putrini R Harsusani, Harsusani Ir. Yustinus, Yoseph Iswandi, Agung Jayawarsa, A.A. Ketut Kalsum, Syf Umi Karlina, Vevie Khairul Muttaqin, Khairul Kurnila, Nely Martanto . Mastura, Syf Mastura, Syf. Nasfadilla, Yolanda Nova Zulfahmi, A. Nur Aida Nur Aida, Nur Purnomo, Julyan Putrini R. Harahap, Saima Rabiya, Rabiya Ravi, Ahmad Siregar, Riska Febriana Suratmin Suryansyah, Suryansyah Umi Kalsum, Syf. Yustinus, Yoseph ‘Ain, Hurul