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All Journal Journal of Global Engineering Research & Science (J-GERS)
Dedy Rutama
Department of Civil Engineering, Faculty of engineering and computer science, Jakarta Global University, 16412, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Environmental Science

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The Effect of Adding Glass Powder Waste And Superplasticizier On Concrete Compressive Strength Lukhvi Dian Basiroh Hutasuhut; Dedy Rutama; Ribut Nawang Sari
Journal of Global Engineering Research and Science Vol. 4 No. 2 (2025): Vol. 4 No. 2 (December 2025): Journal of Global Engineering Research & Science
Publisher : Jakarta Global University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/j-gers.v4i1.117

Abstract

This study investigates the effect of glass powder as a partial replacement for fine aggregate on the physical properties and compressive strength of concrete. The experimental program included bulk density testing, moisture content analysis, mix design development, slump testing, and compressive strength testing at the age of 28 days with a target strength of K-250. Glass powder was incorporated at replacement levels of 0%, 2%, 4%, and 8% by weight of fine aggregate, while a superplasticizer was used to maintain workability. The results indicate that fine aggregate has the highest unit weight, followed by coarse aggregate, whereas glass powder exhibits the lowest unit weight. Moisture content results show that coarse aggregate has the highest moisture content, while glass powder has the lowest. Slump test results demonstrate that all concrete mixtures achieved acceptable workability, with slump values ranging from 9 to 11 cm. Compressive strength testing shows that normal concrete achieved the highest strength, while the inclusion of glass powder led to a reduction in strength, particularly at higher replacement levels. However, the mixture with 4% glass powder showed relatively better performance compared to other glass powder variations. Overall, the study concludes that glass powder can be used as a partial fine aggregate replacement in concrete at controlled percentages without significantly compromising workability and with acceptable early-age strength performance.
Analysis of the Effect of Aggregate Gradation Size (0.2 – 2cm) on the Compressive Strength of Porous Concrete for Parking Applications Dilla Natasya Amelia; Dedy Rutama; Lintang Dian Artanti
Journal of Global Engineering Research and Science Vol. 4 No. 1 (2025): Vol. 4 No. 1 (June 2025): Journal of Global Engineering Research & Science (J-G
Publisher : Jakarta Global University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56904/j-gers.v4i1.118

Abstract

Many parking lots are not well designed, so they often experience waterlogging due to rain, which disrupts user comfort and causes damage to infrastructure. Porous concrete is one of the new innovations being developed. This study uses various aggregate gradations to evaluate the mechanical characteristics and physical properties of porous concrete with a design compressive strength of K-150 kg/cm2. This study aims to analyze the effect of aggregate gradation with a size of 0.2 cm to 1.2 cm on the compressive strength and porosity of porous concrete used in parking lot applications. The research method applies an experimental approach in the laboratory, with compressive strength testing referring to ASTM C39 and concrete porosity referring to ASTM C192-2012. The results show that aggregate gradation of 0.2 cm - 0.7 cm has a greater average compressive strength at the age of 28 days, namely 90.19 kg/cm2 but the porosity value is smaller, namely 24.29%. Aggregates with an aggregate gradation of 0.7 cm - 1.2 cm showed an average compressive strength value of 85.06 kg/cm2 and a porosity value of 28.7% while aggregate gradations with a size of 1cm - 2 cm showed a small average compressive strength value at the age of 28 days of 80.01 kg/cm2 but the porosity value obtained was higher at 30.5%. In this test, the compressive strength at the age of 28 days with an aggregate gradation of porous concrete of 0.2 cm - 0.7 cm still meets the SNI 03-0691-2022 standard for Class B qualification (parking lot)
Co-Authors Dilla Natasya Amelia Lintang Dian Artanti Lukhvi Dian Basiroh Hutasuhut Ribut Nawang Sari