Destructive and Non-destructive Tests of Bamboo Oriented Strand Board under Various Shelling Ratios and Resin Contents

Abstract

The objectives of this study were to evaluate the effects of shelling ratio and resin content on the properties of bamboo oriented strand board (BOSB) from betung (Dendrocalamus asper) and to determine the correlation between the results of dynamic and static bending tests. Strands were steam-treated at 126 ºC for 1 h under 0.14 MPa pressure and followed by washing with 1% NaOH solution. Three-layer BOSB with the core layer perpendicular to the surface was formed with shelling ratios (face:core ratio) of 30:70; 40:60; 50:50; 60:40 and binded with 7% and 8% of phenol formaldehyde (PF) resin with the addition of 1% of wax. The evaluation of physical and mechanical properties of BOSB was conducted in accordance with the JIS A 5908:2003 standard and the results were compared with CSA 0437.0 standard for commercial OSB (Grade O-1). Non-destructive testing was conducted using Metriguard Model 239A Stress Wave Timer which has a wave propagation time from 1 to 9,999 μs and a resolution of 1 μs. BOSB with 8% resin content showed better physical and mechanical properties than those with 7% resin content. The increase of the face layer ratio improved the strength of BOSB in parallel direction to the grain. The results suggested that shelling ratio of 50:50 could be used as a simple way to reduce PF resin requirements from 8% to 7% and to meet the requirements of CSA 0437.0 standard. The results of non-destructive and destructive tests showed a strong correlation, suggesting that non-destructive test can be used to estimate the bending properties of BOSB.

Physical and Mechanical Properties of Oriented Strand Board from Three Species of Plantation Forests at Various Resin Contents

“…Meanwhile, the TS value of sengon OSB was significantly different at each level. The results of this study were in accordance with previous studies, showing the increase of resin content resulted in a decrease in TS values (Febrianto et al 2015;Hariz et al 2021;Maulana et al 2019b). The TS value in all OSB decreased as the resin content increased.…”

“…OSB quality can be influenced by several factors, including pre-treatment, strand quality, strand size, particle orientation, layer structure, moisture content, board density, density profile (Febrianto et al 2017;Maulana et al 2019a), adhesive type, resin content (Lubis et al 2020), and wood species (Maulana et al 2019b). Wood species with high density can improve the quality of OSB (Dumitrascu et al 2020;Hidayat et al 2013;Lunguleasa et al 2021).…”

Physical and Mechanical Properties of Bamboo Oriented Strand Board Prepared fromAlkali-Immersed Strands

“…On the other hand, bamboo can be used as raw material due to its good strength, hardness, machining, nishing properties, and wide distribution (Ami et al, 2017;Badan Pusat Statistik, 2020;Febrianto et al, 2017;Bholanath et al, 2017). Therefore, many studies on OSB production from bamboo have been carried out (Adrin et al, 2013;Fatrawana et al, 2019;Febrianto et al, 2009, Febrianto et al, 2015Maulana et al, 2021a;Maulana et al, 2021b;Maulana et al, 2020;Maulana et al, 2017;Maulana et al, 2019;Maulana et al, 2021c).…”

Physical and Mechanical Properties of Bamboo Oriented Strand Board Under Various Post-Thermal Treatment Duration

“…As a result, the dimensional stability of BOSB is continually improved to get the result optimally. Steam pretreatment on the bamboo strand followed by sodium hydroxide (NaOH) solution rinsing showed excellent dimensional stability of BOSB (Fatrawana et al 2019;Maulana et al 2019Maulana et al , 2021. This phenomenon is due to the removed hemicellulose and extractive contents from the strands during steaming and washing with a 1% NaOH responsible for the BOSB improved dimensional stability (Fatrawana et al 2019).…”