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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) JOURNAL SCIENTIFIC OF MANDALIKA (JSM)
Setiyaningsih, Sri Indah
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Other

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Potensi Penggunaan Kayu Hutan Tanaman Rakyat sebagai Elemen Struktur (Sebuah Upaya Perlindungan terhadap Hutan Alami) Setiyaningsih, Sri Indah; Yeni, Manovri
Journal Scientific of Mandalika (JSM) e-ISSN 2745-5955 | p-ISSN 2809-0543 Vol. 6 No. 6 (2025)
Publisher : Institut Penelitian dan Pengembangan Mandalika Indonesia (IP2MI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/10.36312/vol6iss6pp1573-1581

Abstract

In Indonesia, there are approximately 4,000 types of trees. The demand for wood continues to increase with the development of infrastructure across the country. However, the fact remains that the rapid rate of forest destruction in Indonesia has led to a raw material crisis in the forestry industry. According to SKEPHI (Indonesian Forest Conservation Cooperation Secretariat), regarding the condition of Indonesia's forests during 2007-2008, the manifestation of forest destruction is evidenced by Indonesia breaking the Guinness World Record in 2007 as the fastest forest-destroying country. Another issue faced is the growing population of Indonesia, which results in a large shortage of wood supply and its consequences. Aesthetically, wood is appealing due to its artistic value. Mechanically, wood is chosen for its relatively higher tensile strength and shear strength compared to concrete, making it a safer option when used as structural components in earthquake-prone areas, particularly for residential buildings. This situation must be anticipated by seeking alternatives to the use of natural forest wood with other wood-based materials that have significant potential, can be well-utilized, and can replace natural forest wood as a construction material and for other human needs. For example, the use of composite products like laminated wood made from fast-growing wood species can be an alternative. This can be sourced from cultivated trees in Community Forests or Industrial Timber Plantations. This research focuses on examining the potential use of fast-growing wood as structural elements by evaluating the physical properties of both solid wood and laminated wood. The main objective of this research is to address the scarcity of wood or wood resources from natural forests. The method used in this study involves selecting three types of fast-growing wood, followed by physical property testing in a laboratory.
Performance Analysis of Recycled Asphalt Material Foundation Layer and Top Foundation Layer Reviewed from Primary Displacement Diyanti; Supomo, Fani Yayuk; Setiyaningsih, Sri Indah
Jurnal Penelitian Pendidikan IPA Vol 10 No 11 (2024): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i11.9182

Abstract

This study aims to determine the unconfined compressive strength of recycled materials based on variations in cement content of 1%, 3%, and 5%, as well as the percentage of emulsified asphalt. This study is urgently needed because the massive development of road infrastructure drives an increase in the need for road materials. Utilization of recycled waste from existing asphalt layers and foundation layers is an alternative sustainable and environmentally friendly material. Reusing this material is more efficient if the road damage has not reached the structural stage. Testing in the study was conducted experimentally at the Road Materials Center Laboratory, Bandung, using materials from existing asphalt layers and foundations. Testing includes physical analysis of the material, compaction to determine the optimum water content and maximum dry density, and unconfined compressive strength. The results showed that the unconfined compressive strength with cement content of 1%, 3%, and 5% were 0.70 MPa, 1.70 MPa, and 2.09 MPa, respectively, with primary displacement values ​​of 20 mm, 25.8 mm, and 24.7 mm. Meanwhile, the residual strength value decreased with increasing cement content, namely 76.3%, 66.3%, and 64.3%.
Co-Authors Diyanti Fani Yayuk Supomo Manovri Yeni