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All Journal Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam (JURRIMIPA) Journal of Multidisciplinary Science: MIKAILALSYS
Fandi Oktasendra
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Environmental Science Mathematics Physics Social Sciences Other

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Pengaruh Penambahan Aspal Buton pada Aspal Pen 60/70 terhadap Sifat Mekanik pada Lapisan Permukaan AC-WC Shilvhanie Usman; Yenni Darvina; Leni Aziyus Fitri; Fandi Oktasendra
JURNAL RISET RUMPUN MATEMATIKA DAN ILMU PENGETAHUAN ALAM Vol. 5 No. 1 (2026): April : JURRIMIPA: Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurrimipa.v5i1.8699

Abstract

This study aims to determine the effect of adding Buton Asphalt on the mechanical properties of Asphalt Concrete – Wearing Course (AC-WC) mixtures based on Marshall test parameters. The variations of asphalt content used were 0%, 2%, and 5%. Each variation was tested using the Marshall method to obtain the values of Stability, Flow, Void in Mix (VIM), Void in Mineral Aggregate (VMA), Void Filled with Asphalt (VFA), and Marshall Quotient (MQ). The results show that the addition of Buton Asphalt affects the improvement of the mixture characteristics. The highest stability value was obtained at 5% Buton Asphalt content, which was 1,074 kg, while the lowest flow value was also found at 5%, which was 2.48 mm, indicating that the mixture becomes stiffer and more stable. The VIM value decreased from 4.7% at 0% content to 4.2% at 5% content, indicating that the air voids in the mixture became smaller. The VMA value also decreased from 16.2% at 0%, 15.8% at 2%, and 15.1% at 5%, while the VFA value increased from 71% to 72.18%. The highest Marshall Quotient (MQ) value was obtained at 5% Buton Asphalt content, which was 433 kg/mm, indicating that the mixture has better stiffness and resistance to deformation. Based on these results, it can be concluded that the addition of 5% Buton Asphalt provides the best mixture characteristics for the AC-WC layer.
The Effect of Lemongrass Leaf and Betel Leaf Extract Ratio Variations on the Optical Characteristics and Crystal Structure of Silver Nanoparticles Synthesized via Green Synthesis Nirmala Rahima Suci; Riri Jonuarti; Leni Aziyus Fitri; Fandi Oktasendra
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 3 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mikailalsys.v4i3.11561

Abstract

Green synthesis of silver nanoparticles (AgNPs) provides an environmentally sustainable approach by utilizing plant-derived bioactive compounds as reducing and stabilizing agents. The combination of lemongrass (Cymbopogon citratus) and betel leaf (Piper betle L.) extracts may enhance AgNP formation because both contain flavonoids, phenolic compounds, citral, eugenol, and other secondary metabolites. This study aimed to investigate the effects of different lemongrass-to-betel leaf extract ratios on the physical characteristics of AgNPs synthesized through a green synthesis method. AgNPs were prepared using extract ratios of 1:1, 3:1, and 1:3 and characterized using UV–Visible spectroscopy, particle size analysis (PSA), and X-ray diffraction (XRD). UV–Visible spectroscopy confirmed AgNP formation through surface plasmon resonance absorption bands in all samples, with maximum wavelengths of 419, 444, and 398 nm and absorbance values of 1.98, 1.98, and 2.47 for the 1:1, 3:1, and 1:3 ratios, respectively. PSA showed average particle sizes of 39.1 ± 0.9 nm, 59.7 ± 16.1 nm, and 47.2 ± 4.6 nm, with the smallest particle size obtained at the 1:1 ratio. XRD analysis confirmed that all samples possessed a face-centered cubic crystalline structure, with average crystallite sizes of 16.72 nm for the 1:1 ratio, 14.72 nm for the 3:1 ratio, and 9.37 nm for the 1:3 ratio. These findings demonstrate that variations in the composition of the dual-bioreductant system influence the optical properties, particle size, and crystallite size of the synthesized AgNPs. The 1:1 ratio produced the smallest hydrodynamic particle size, whereas the 1:3 ratio yielded the highest absorbance and smallest crystallite size. This study contributes to the optimization of plant-mediated AgNP synthesis by demonstrating that the relative composition of lemongrass and betel leaf extracts is a critical parameter for controlling nanoparticle characteristics.
Co-Authors Leni Aziyus Fitri Nirmala Rahima Suci Riri Jonuarti Shilvhanie Usman Yenni Darvina