Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Ensiklopedia of Journal Agro Bali: Agricultural Journal
Firman Hidayat
Universitas Muhammadiyah Sumatera Barat
Agriculture, Biological Sciences & Forestry Arts Humanities Computer Science & IT Law, Crime, Criminology & Criminal Justice Social Sciences

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
PENGARUH PERSENTASE PEREKAT POLYETHYLENE TERHADAP SIFAT FISIS DAN MEKANIS WOOD PLASTIC COMPOSITE (WPC) BERBAHAN BAKU SERBUK KAYU KERUING (Dipterocarpus Spp.) Susilastri Susilastri; Aldri Frinaldi; Dasman Lanin; Rembrandt Rembrandt; Genius Umar; Firman Hidayat; Yefnika Fazira
Ensiklopedia of Journal Vol 8, No 2 (2026): Vol. 8 No. 2 Edisi 1 Januari 2026
Publisher : Lembaga Penelitian dan Penerbitan Hasil Penelitian Ensiklopedia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/eoj.v8i2.3547

Abstract

This study aims to determine the effect of polyethylene (HDPE) adhesive percentage on the physical and mechanical properties of Wood Plastic Composite (WPC) made from Dipterocarpus spp. (keruing) sawdust. The research is driven by the decreasing availability of natural wood and the increasing volume of plastic waste, highlighting the need for innovative, environmentally friendly, and sustainable material alternatives. The method used was a Completely Randomized Design (CRD) with five treatment compositions of keruing sawdust and polyethylene: A (80:20), B (75:25), C (70:30), D (65:35), and E (60:40), each with three replications. The observed parameters included physical properties (density, moisture content, water absorption, and thickness swelling) and mechanical properties (Modulus of Rupture/MOR and Modulus of Elasticity/MOE). Data were analyzed using ANOVA followed by Duncan’s Multiple Range Test (DMRT) at a 5% significance level.The results showed that increasing the proportion of polyethylene significantly affected most physical and mechanical properties of WPC. The highest density (1.1 g/cm³) was observed in treatments D and E, although not significantly different statistically. Moisture content, water absorption, and thickness swelling decreased significantly with increased adhesive. The best performance was found in treatment E (60% wood, 40% polyethylene) with moisture content at 1.54%, water absorption at 197.82%, and thickness swelling at 9.19%, meeting the JIS A 5908-2003 standard. Mechanically, MOR and MOE values also increased, with the highest values recorded at 99.47 kgf/cm² and 30 kgf/cm², respectively, although still below JIS standards. In conclusion, increasing the proportion of polyethylene adhesive improves both physical and mechanical properties of keruing-based WPC. A formulation of 60% keruing sawdust and 40% polyethylene is recommended as the optimal composition for producing high-quality WPC from wood and plastic waste. Keyword: Wood Plastic Composite, polyethylene, keruing sawdust, physical properties, mechanical properties, HDPE.
Optimizing Land-Use Scenarios for Water-Resource Sustainability in the Upper Kampar Watershed, Indonesia Firman Hidayat; Agung Primatara Marwan
Agro Bali : Agricultural Journal Vol 9, No 2 (2026)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37637/ab.v9i2.2766

Abstract

Soil erosion in the Upper Kampar Watershed threatens reservoir storage and downstream water reliability. This study compared four land-use scenarios using the Universal Soil Loss Equation and the Soil Conservation Service Curve Number method across 100 land units. Existing land use produced 142.70 t.ha−1.yr−1 of soil loss, well above the tolerable value of 39.62 t.ha−1.yr−1. Meeting the minimum forest-cover rule lowered erosion by 31.95% but did not reach the threshold. Strip cropping reduced erosion to 32.90 t.ha−1.yr−1, whereas rehabilitation of mapped protected areas yielded 36.15 t.ha−1.yr−1 and the lowest Qmax/Qmin ratio (28.38). Discharge records supported directional checking, but independent event-scale validation was unavailable. The results support protected-area rehabilitation as a zoning framework, combined with soil-conservation practices on cultivated slopes and field monitoring of sediment and river flow.
Co-Authors Agung Primatara Marwan Aldri Frinaldi Dasman Lanin Genius Umar Rembrandt Rembrandt Susilastri Susilastri Yefnika Fazira