Oriented Strandboard-GEOGYPTM Underlayment - A Novel Composite Flooring System

An innovative flooring underlayment was produced
and tested. The composite system is made of common OSB boards
and a layer of eco-friendly non-cement gypsum based material
(GeoGypTM). It was found that the shear bond between the two
materials is sufficient to secure the composite interaction between the
two. The very high compressive strength and relatively high tensile
strength of the non-cement based component together with its high
modulus of elasticity provides enough strength and stiffness for the
composite product to cover wider spacing between the joists. The
initial findings of this study indicate that with joist spacing as wide as
800 mm, the flooring system provides enough strength without
compromising the serviceability requirements of the building codes.

• B. Noruziaan
• A. Shvarzman
• R. Leahy

• Composite
• floor deck
• gypsum based
• lumber joist
• non-cement
• oriented strandboard
• shear bond.

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