BioResources (Nov 2023)

Effect of Impregnation with Diammonium Phosphate and Sodium Silicate on Some Physical and Mechanical Properties of Modified Laminated Veneer Lumber Made of Jabon Wood

  • Eka Mulya Alamsyah,
  • Ahmad Fawwaz Abdullah,
  • Yoyo Suhaya,
  • Sutrisno,
  • Atmawi Darwis,
  • Ihak Sumardi,
  • Asep Suheri,
  • Sasa Sofyan Munawar,
  • Jamaludin Malik

Journal volume & issue
Vol. 19, no. 1
pp. 306 – 321

Abstract

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Laminated veneer lumber (LVL) and laminated veneer board (LVB) panels from jabon wood (Neolamarckia cadamba) were impregnated with fire retardation substances, namely diammonium phosphate (DAP) and sodium silicate (SS). Prior to testing, the boards were conditioned in relative humidity (RH) of 65% and a temperature of 25 °C. The moisture content (MC), bending strength tests in flat wise position, and bonding tests were conducted in accordance with the Japanese Agricultural Standard (JAS:2008). Density tests and hardness tests were conducted in accordance with ASTM D143 standard (2003) in 50 mm x 50 mm. Thickness-swell shrinkage tests were conducted in accordance with the standard BS EN 317:1993, and fire resistance was tested under PS 1-19 standard. The use of 20% DAP and SS solution on jabon wood using impregnation methods affected some of the properties of the panels, especially the moisture content, density, and bonding strength of LVL and LVB compared to the control panels. Both DAP and SS impregnation increased the density. The treatments showed promise for resisting fire, as well as increasing the moisture content and increasing the density compared to the control.

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