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All Journal IPTEK The Journal of Engineering Journal Integration of Management Studies
Kusbiantoro, Andri
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Mechanical Engineering

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Evaluating the Socio-Economic Effects of Fly Ash and Agricultural Waste on the Construction Sector Laory, Irwanda; Ekaputri, Januarti Jaya; Kusbiantoro, Andri; Rahadi, Raden Aswin; Setiamarga, Davin H. E.; Adha, Augusta; Afgani, Kurnia Fajar
Journal Integration of Management Studies Vol. 2 No. 2 (2024)
Publisher : Integrasi Sains Media

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58229/jims.v2i2.232

Abstract

The building industry significantly impacts environmental degradation due to its reliance on conventional materials such as cement and concrete, which are associated with high carbon emissions and substantial energy consumption. This study explores the socio-economic impacts of substituting fly ash and agricultural waste for traditional construction materials. A comprehensive review of 50 peer-reviewed papers, industry reports, and online sources reveals that these alternative materials offer considerable benefits. Cost savings average between 15% and 20%, driven by reduced material costs and lower disposal requirements. Environmentally, using fly ash and agricultural waste significantly reduces greenhouse gas emissions, with fly ash cutting emissions by approximately 25% and agricultural waste by about 20%, primarily due to decreased energy consumption. Furthermore, technical assessments show that these materials enhance the strength and durability of concrete, meeting or exceeding conventional standards. The study also highlights broader socio-economic advantages, including support for rural economies through new markets for agricultural by-products and job creation in recycling and construction sectors. These findings suggest integrating fly ash and agricultural waste into construction practices can positively impact economic growth and environmental sustainability. However, the study acknowledges limitations such as reliance on secondary data and potential geographic biases. Future research should prioritize original data collection, long-term performance assessments, and investigation of regional material-use variations. This study underscores the practical and environmental benefits of incorporating these sustainable materials, contributing to a more eco-friendly construction industry.
Performance Changes in Mass and Compressive Strength of High-Calcium Fly Ash Based Geopolymer Concrete Due to Sodium Sulphate Exposure Tajunnisa, Yuyun; Husin, Nur Achmad; Kusbiantoro, Andri; Daffa Azmi, Ahmad; Fadilah Ashara, Khansa; Shigeishi, Mitsuhiro
IPTEK The Journal of Engineering Vol 10, No 1 (2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v10i1.a16232

Abstract

The sulfate environment is one of the conditions that significantly affect the durability of concrete. Sulfate attack causes cracks and affects the quality of the concrete. Therefore, it is necessary to innovate concrete that can withstand the aggression of this sulfate attack. Geopolymer concrete is a breakthrough that can be developed as an alternative material without using Portland cement as the ingredients, yet by using class F fly ash as the primary source material. On the other hand, the availability of class C fly ash with high CaO content is highly abundant in Indonesia. The high calcium content in this fly ash will cause the fresh geopolymer concrete to harden rapidly. Previous studies used sucrose as an additive to overcome this rapid hardening problem. However, its effect on the geopolymer concrete exposed to sulfate ingression requires further investigation. In this study, the geopolymer concrete was produced by using class C fly ash and sucrose. The sulfate ingression was simulated by immersing the concrete specimen in the sodium sulfate solution while the mass changes and compressive strength were examined. pH measurement of the sodium sulfate solution was also carried out to provide a different perspective on the data analysis. Cylindrical specimens, measuring 10 cm x 20 cm, were produced using the dry-mixing method and the characteristic strength of 28 MPa according to SNI 2847–2019. From the results, geopolymer concrete with sucrose showed a high workability performance through the high slump value obtained. Nevertheless, the experimental results also indicated the declining strength of geopolymer concrete after the sulfate exposure. However, only a slight reduction was observed. The strength residue still satisfies the minimum requirement of SNI 2847-2019. It shows the potential of geopolymer concrete to be used as a construction material in a harsh environment with high sulfate content.
Co-Authors Adha, Augusta Afgani, Kurnia Fajar Daffa Azmi, Ahmad Fadilah Ashara, Khansa Husin, Nur Achmad Januarti Jaya Ekaputri Laory, Irwanda Raden Aswin Rahadi Setiamarga, Davin H. E. Shigeishi, Mitsuhiro Yuyun Tajunnisa