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All Journal Jurnal Biosains Pascasarjana Gorontalo Journal of Public Health Open Access Health Scientific Journal Jurnal Multidisiplin Madani (MUDIMA) International Journal of Health and Pharmaceutical (IJHP) Hang Tuah Medical Journal Eduvest - Journal of Universal Studies Prominentia Medical Journal Ranah Research : Journal of Multidisciplinary Research and Development Journal of Global Research in Public Health
William Sayogo
Universitas Ciputra
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Neuroscience Nursing Public Health Social Sciences Transportation Veterinary Other

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Metabolic Risk Profile and Visual Function Among Ride-Hailing Drivers William Sayogo; Victor Setiawan Tandean; Minarni Wartiningsih; Christina Destri Wiwis Wijayanti; Eveline Yulia Darmadi
Eduvest - Journal of Universal Studies Vol. 6 No. 9 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i9.53509

Abstract

Fly ash- and pumice-based geopolymers have emerged as promising low-carbon construction materials with the potential to reduce the environmental impacts associated with Portland cement production. However, their performance is highly dependent on mixture proportions, particularly the liquid-to-solid (L/S) ratio. Therefore, this study aimed to identify the optimum L/S ratio and evaluate its influence on the characteristics of geopolymer mortar. A laboratory experimental program was conducted using five liquid-to-solid (L/S) ratios of 0.40, 0.45, 0.50, 0.55, and 0.60. The investigated properties included compressive strength, density, and water absorption. The statistical significance of the L/S ratio was evaluated using one-way analysis of variance (ANOVA). The L/S ratio significantly affected the compressive strength, density, and water absorption of geopolymer mortar. The optimum performance was achieved at an L/S ratio of 0.45, yielding the highest compressive strength (21.03 MPa), highest density (2.12 g/cm³), and lowest water absorption (6%). One-way ANOVA confirmed that variations in the L/S ratio had statistically significant effects on all investigated properties (p < 0.001), with coefficients of determination of 99.44% for compressive strength, 98.42% for density, and 75.04% for water absorption. The liquid-to-solid (L/S) ratio is a critical parameter governing matrix densification, porosity development, and the physical and mechanical properties of fly ash- and pumice-based geopolymer mortar. An L/S ratio of 0.45 is recommended as the optimum condition for achieving the best balance among compressive strength, density, and water absorption.
Co-Authors Afifah, Balqis Antonius Yansen Suryadarma Bravimasta, Bracovanca Diwayestara Cempaka Harsa Sekarputri Christina Destri Wiwis Wijayanti Eveline Yulia Darmadi Ferdinand Aprianto Tannus Firmanto, Ian Ardhiya Gumay, Nur Intan Permatasari Hebert Adrianto Inez Purnomasari Prajitno IZDIHAR, VEYSHA Jemima Lewi Santoso Jemina Lewi Santoso Lindarto, Wira Widjaya Maela, Nurul Minarni Wartiningsih Muflihan, Yenni Ni Njoman Juliasih Novian Budi Santoso Raden Roro Shinta Arisanti Rahajoe Imam Santoso Rahma, Sita Fauzia Safitri, Rosyida Awalia Setiawan, Yuni Wahyuningsih Stefani Nurhadi VEYSHA IZDIHAR Victor Kurniawan Yuwono Victor Setiawan Tandean Victor Setiawan Tandean Winata Yantono Widarto Wirya, Stephen Akihiro