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Abstract
Some physical and mechanical properties of oriented strandboards (OSBs) containing
waste tire rubber at various addition levels based on the oven-dry strand weight,
using the same method as that used in the manufacture of OSB. Two resin types, phenol-formaldehyde
(PF) and polyisocyanate, were used in the experiments. The manufacturing parameters
were: a specific gravity of 0.65 and waste tire rubber content (10/90, 20/80 and 30/70
by wt.% of waste tire rubber/wood strand). Average internal bond values of PF-bonded
OSB panels with rubber chips were between 17.6% and 48.5% lower than the average of
the control samples while polyisocyanate bonded OSBs were 16.5-50.6%. However, water
resistance and mechanical properties of OSBs made using polyisocyanate resin were
found to comply with general-purpose OSB minimum property requirements of EN 300 Type
1 (1997) values for use in dry conditions at the lowest tire rubber loading level
(10%) based on the oven-dry panel weight. The tire rubber improved water resistance
of the OSB panel due to its almost hydrophobic property. Based on the findings obtained
from this study, we concluded that waste tire rubber could be used for general-purpose
OSB manufacturing up to 10% ratio based on the oven-dry panel weight.