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All Journal Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Jurnal Sipil Terapan
Much Suranto
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Civil Engineering, Building, Construction & Architecture Computer Science & IT

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Pengembangan Teknologi Bahan Mendukung Pembangunan Berkelanjutan Bidang Teknik Sipil (High Volume Fly Ash Self Compacting Concrete/ HVFA-SCC) Much Suranto; Darupratomo Darupratomo; Hendro Saputro
Jurnal Sipil Terapan Vol. 2 No. 1 (2024): Mei : Jurnal Sipil Terapan
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/jusit.v2i1.382

Abstract

The aim of this literature study is to conclude that the use of fly ash as a replacement material for most of the functions of cement in concrete mixes meets the standards for using concrete mixes as environmentally friendly building construction materials in the context of sustainable development, reducing the risk of the greenhouse effect caused by carbon dioxide. The conclusion is that Fly ash, as waste from burning coal for power plants, can be used as a substitute for most of the functions of Portland cement, so that the waste material becomes an economic value and an effort to save the environment. And the mechanism for using HVFA-SCC concrete provides a work productivity solution in the construction sector in reducing the use of labor more efficiently and economically, as well as reducing the use of a large proportion of cement in the concrete composition. Fly ash contains physical and chemical elements with an equivalent composition that is similar to Portland cement. The softness of the fly ash grains is beneficial for filling empty spaces, making the concrete denser and more compact. The equivalent physical and chemical properties mean that fly ash can replace Portland cement.
Studi Karakteristik Mekanik Komposit Kayu Randu Bermatrik Asam Sitrat Much Suranto; Darupratomo Darupratomo; Ratnanik Ratnanik
JURAL RISET RUMPUN ILMU TEKNIK Vol. 5 No. 1 (2026): April: Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v5i1.7219

Abstract

This paper was made to explain the results of research on how to obtain the most appropriate citric acid adhesive composition in the manufacture of randu wood fiber composites in order to obtain a strong and suitable composite material. The research was carried out by experimental methods in the laboratory through a series of mechanical tests, namely the bending strength test and the screw grip strength test. The sample specimen is 5 cm × 20 cm × 1 cm for flexural strength testing and 5 cm × 10 cm × 1 cm for screw grip strength test. Composite specimens were made with variations in the composition of citric acid adhesives of 2.5%, 5%, 7.5%, 10%, 12.5%, 15%, 17.5%, and 20% by weight of randu wood. The results showed that the composite of randu wood particles with a citric acid matrix had optimal strength at a certain ratio, which was 7.5%. At the same ratio, the test results of the screw grip strength test also provide the highest value. These findings confirm that the exact composition of the adhesive has a significant impact on the final performance of the resulting composite.
Co-Authors Darupratomo, Darupratomo Hendro Saputro Ratnanik Ratnanik