Dimensional Stability of Cement Bonded Boards Produced from Thaumatococus danielli Stalk
Published: 2019-10-04
Page: 453-459
Issue: 2019 - Volume 2 [Issue 4]
E. A. Adelusi *
Department of Wood and Paper Technology, Federal College of Forestry, P.M.B. 5087, Jericho, Ibadan, Nigeria.
S. A. Adedokun
Department of Basics Science and General Studies, Federal College of Forestry, Ibadan, P.M.B. 5087, Jericho, Ibadan, Nigeria.
F. T. Adelusi
Department of Agricultural Extension and Management, Federal College of Forestry, Ibadan, P.M.B. 5087, Jericho, Ibadan, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
Cement bonded boards 6 mm thick were produced using Thaumatococcus daniellii stalk. Thaumatococcus daniellii and cement were mixed together at two different mixing ratios and three board densities of 2.5:1 and 3:1 and 500, 600 and 700 g/cm3, respectively. After 24 h of cold-water immersion, the mean water absorption of the cement bonded board ranged from 22.9 to 48.5% for (cement/stalk) mixing ratio of 3:1 and 2.5:1 with board density 700 and 500 g/m3 respectively. Cement bonded board produced from the highest levels of cement: stalk ratio (3:1) and board density (700 g/cm3) were dimensional more stable as they had the lowest value for water absorption. The least dimensionally stable boards were produced from the mixing ratio cement: stalk ratio (2.5:1) and board density (500 g/m3). The mean values obtained for thickness swelling (TS) after 24 hours of cold-water immersion ranged from 0.19 to 0.74%. Result shows that the higher the increase in mixing ratio of cements to fibre (3:1) and board density (700 g/cm3) caused decrease in thickness swelling and water absorption. From this study, Thaumatococcus daniellii stalk proved to be suitable for the production of cement–bonded board.
Keywords: Thaumatococcus daniellii stalk, cement bonded board, water absorption, thickness swelling.