Stress-relieving barrier membrane for concrete slabs and foundation walls
AssigneePolyguard Products, Inc.
InventorsJohn W. Muncaster, Tony Joe Millican
Life of this patent
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Abstract
A composite membrane comprising a layer of rubberized asphalt having a heavy duty plastic film layer continuously bonded to one side and, optionally, a layer of nonwoven geotextile continuously bonded to the other side. The membrane can be used in vertical or horizontal applications, and is particularly useful for its stress-relief properties that resist crack formation and propagation in concrete walls and slabs in addition to serving as a barrier to moisture, toxic substances and insects. An appropriate composite membrane of the invention can be advantageously utilized in positive side, blindside, underslab or split slab applications. The thickness of the composite membrane preferably ranges from about 30 mils to about 150 mils.
Claims20
A method for reducing crack formation and propagation in concrete slabs and walls, comprising the steps of:
- providing a composite membrane having a heavy plastic film layer on a first side, a geotextile layer on a second side, and a rubberized asphalt layer disposed between the two sides;
- applying the composite membrane to a substrate with a durable plastic film layer facing and contacting the substrate;
- and thereafter
- pouring concrete against the geotextile layer to bond the composite membrane to the concrete.
Dependencies are inferred from the claim text.