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All Journal Authentic Research of Global Fisheries Application Journal (Aurelia Journal) Indonesian Journal of Multidisciplinary Science
Maulana, Muhammad Agung
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Humanities Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Public Health Social Sciences

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Analysis of the effect of the combination of fly ash, plastic waste, and natural stone waste as a substitute additive for making environmentally friendly concrete on the compressive strength of concrete Maulana, Muhammad Agung; Septian, Fadhlan Ghifari; Ramadon, Deni; Roesdiana, Tira
Indonesian Journal of Multidisciplinary Science Vol. 4 No. 6 (2025): Indonesian Journal of Multidisciplinary Science
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/ijoms.v4i6.1121

Abstract

The ongoing development of infrastructure technology, particularly in constructing buildings, plays a vital role in national progress. Concrete, a widely used construction material, is crucial for civil works and overall development.In this study using an innovation in concrete mixes by utilizing waste that can damage the environment, such as fly ash as a cement additive, plastic waste as a coarse aggregate additive, natural stone waste as a fine aggregate additive. The primary objectives of this study are to assess the impact of waste addition on concrete production, establish optimal and minimal waste variations affecting concrete compressive strength, and evaluate the performance of waste mixtures in comparison to normal concrete. Various waste percentages were integrated into the concrete mix: fly ash (5%, 10%, 15%, 20%, 25%, 30%), plastic waste (2%), and natural stone waste (40%). Test specimens were cube-shaped, measuring 15x15x15 cm. Concrete curing took place over 7, 14, 21, and 28 days, with subsequent compressive strength testing. . From the analysis results show a significant correlation between the proportion of added ingredients in the concrete mixture tends to increase the compressive strength of concrete at a certain limit, obtained the optimum value at 20% variation with a compressive strength of 328.0036 kg/cm2 and the minimum value at 30% variation with a compressive strength of 276.3318 kg/cm2 at the age of 28 days, the use of waste in concrete mixes is very good and can be an alternative in making concrete with environmentally friendly properties.
PHYSICAL BODY RISKS DURING PURSE SEINE FISHING EQUIPMENT OPERATION ON KM. GODBLESS 08 Ikhsan, Suci Asrina; Arkham, Muhammad Nur; Haris, Rangga Bayu Kusuma; Kelana, Perdana Putra; Maulana, Muhammad Agung
Aurelia Journal Vol 6, No 2 (2024): October
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v6i2.15046

Abstract

Work productivity can decrease if a worker suffers from musculoskeletal disorders (MSDs). Ergonomic review study so that MSDs can be prevented or minimized. The study examined MSDs in ABK operating purse seine fishing gear. The method used in this study is the WERA (Workplace Ergonomic Risk Assessment) method. The results of the study obtained the risk level in 3 work positions with a medium level and one work position at a low level. The score at the medium level is between 39 and 42 scores, while the score for the low level itself is at 27. The highest score is in the stern work position with a value of 42 and the lowest score occurs in the work position handling the catch with a value of 27.
Co-Authors Haris, Rangga Bayu Kusuma Muhammad Nur Arkham Perdana Putra Kelana Ramadon, Deni Septian, Fadhlan Ghifari Suci Asrina Ikhsan Tira Roesdiana