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All Journal Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan APPLIED RESEARCH ON CIVIL ENGINEERING AND ENVIRONMENT (ARCEE)
Setiawan, Preza
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Materials Science & Nanotechnology Transportation

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OPTIMIZING SUSTAINABLE GEOPOLYMER PRODUCTION: INTERGRATING REACTIVE ULTRAFINE FLY ASH (RUFA) AND RECYCLED FINE AGGREGATE (RFA) Setiawan, Preza; Wei, Ting Lin; Ummati, Alfinna Mahya; Wirawan, Nugraha Bintang
Applied Research on Civil Engineering and Environment (ARCEE) Vol. 6 No. 01 (2025): Material Technology and Digitalization
Publisher : POLITEKNIK NEGERI JAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/arcee.v6i01.6638

Abstract

Construction waste presents considerable risks to human health, safety, and the environment, alongside escalating expenses related to waste management and carbon emissions. Cement manufacturing provides a substantial share of carbon emissions within the construction sector. Geopolymers present a sustainable substitute for conventional cement-based concrete, capable of reducing CO2 emissions and promoting a circular economy. This study investigates the incorporation of Reactive Ultrafine Fly Ash (RUFA) and Recycled Fine Aggregates (RFA) in the production of geopolymers to create sustainable construction materials. The study investigates the physical characteristics, setting time, fluidity, compressive strength, and microstructure of RUFA geopolymers with varying quantities of RFA. The results indicate that incorporating RFA improves compressive strength, with peak results at 40% RFA content. Furthermore, RFA decreases setting time to a specific limit, beyond which additional quantities have negligible effects. Fluidity is maximized in RFA mixtures at 30%, subsequently declining. Scanning electron microscopy analysis revealed microstructural enhancements and increased density in 40% of RFA samples. Statistical analysis indicates the substantial impact of RFA content and sample age on compressive strength. This research offers significant insights into developing sustainable construction materials and underscores the necessity of carefully selecting RFA content. Future research may investigate various combinations and parameters for wider applications in sustainable construction practices.
Optimization of Ready-Mix Concrete Quality at PT Kalla Beton Setiawan, Preza; Indri Rahmadhani Fitriana; Lukamnul Hakim; M Gilang Indra Mardika; Michael
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 1 (2025): MARET
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i1.1316

Abstract

Quality control from raw material to finished ready-mix concrete is vital in the construction industry, where increasing demand aligns with industry growth projected at 4% annually. PT Bumi Sarana Beton (Kalla Beton) faces challenges in maintaining consistent quality due to variations in natural raw materials, which impact product quality and cost. This research investigates the company's quality control strategies, focusing on optimizing material selection and mix designs. Experimental research methods were used, including testing different mix proportions and assessing compressive strength and production costs. The study involved aggregate suitability testing, redesigning concrete mixes with fly ash, and evaluating cost-effectiveness. Findings show that using fly ash improves compressive strength and reduces costs. The research concludes that refined material selection and mix design strategies can enhance product quality and cost efficiency. Recommendations include further exploration of alternative materials, and rigorous quality control to sustain high production standards and maintain competitive advantage in the ready-mix concrete market
Co-Authors Alfinna Mahya Ummati, Alfinna Mahya Indri Rahmadhani Fitriana Lukamnul Hakim M Gilang Indra Mardika Michael Nugraha Bintang Wirawan, Nugraha Bintang Wei, Ting Lin