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Yusuf S Hadi
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Agriculture, Biological Sciences & Forestry

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Journal : Jurnal Ilmu dan Teknologi Kayu Tropis

 1 
Aplikasi Buluh Bambu untuk Konstruksi Rangka Batang Ruang Application of Bamboo Culm for Space Truss Gina Bachtiar; Surjono Surjokusumo; Yusuf S Hadi; Naresworo Nugroho
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 1 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (428.915 KB) | DOI: 10.51850/jitkt.v7i1.238

Abstract

Space truss is a three dimensional structure composed of short slender interconnected bars. The bars are selected to produce lightweight members. Since joints are frictionless pins, truss members carry out only axial force either tension or compression, without bending moment. Bamboo is a potential building material for this structure, because it is relatively light and high strength especially in tension. This research is aimed to develop bamboo joint that could carry out both tension and compression and it application in space truss for 3 m x 4 m simple roof structure.Connection designed using a taper rounded wooden plug attached to the inner part of bamboo and a tapered steel ring was used at the outside of the bamboo culm. Structural analysis using a program with finite element methods indicated that 4 cm diameter bamboo could use for 3 m x 4 m space truss with four supports, whereas for  cantilever  truss, the used of 4 cm diameter bamboo must be varied by using 6 cm diameter bamboo for elements  that resist larger compression force.
Pengaruh Jenis dan Konsentrasi Zat Aditif Perekat dari Kulit Sapi pada Kayu Laminasi Jabon (Effect of Additive Substance and Concentration in Cowhide Adhesive on Jabon Laminated Wood) Lukmanul H Zaini; Yusuf S Hadi; Mahdi Mubarak; Aris Sunaryo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 15, No 1 (2017): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (446.726 KB) | DOI: 10.51850/jitkt.v15i1.355

Abstract

Recently, awareness of using natural adhesive materials for biocomposite products was increased. However, natural adhesive still facing many problems on physical and mechanical properties of the resulting biocomposite products. Therefore, adhesive modifications are needed in order to improve natural adhesives performance. The purpose of this study is to understand the effect of additive substance and concentration in cowhide adhesive on Jabon (Anthocephalus cadamba) laminated wood. Three types of additive substance (paraformaldehyde, polyurethane and albumin) were added into cowhide adhesive with three different concentration (10, 20 and 30%). The testing were conducted on moisture content, density, shear strength, and delamination. Shear strength was tested according to ASTM D-905 while moisture content, density, and delamination were tested according to JAS 234:2003 standard for Glue Laminated Timber. The results showed that all treatment were not affecting moisture content and density. In addition, additive substance was affecting shear strength and delamination. Nonetheless, concentration of additive substance was only affecting shear strength. The best shear strength value were 63.75 kg cm-2. The value meets the JAS 234:2003 standard. Compared to all of the treatment applied, the best result was achieved by 30% paraformaldehyde addition. Based on this experiment, laminated wood is suitable for interior application.Keywords: bio-adhesive, cowhide adhesive, jabon, laminated wood
Co-Authors Aris Sunaryo Gina Bachtiar Lukmanul H Zaini Mahdi Mubarak Naresworo Nugroho Surjono Surjokusumo