DYNAVOID™_a proprietary product developed by Beaver Plastics to meet the requirements for a moisture tolerant protective void form material to be used under structural concrete. Dynamic Inclusion, mechanically responsive to expanding soils, separates Dynavoid from typical void form products.
Structural Slab Void Form System
DYNAVOID™ was developed by Beaver Plastics to meet the requirements for a moisture tolerant void form material to be used under structural concrete. It has much different properties than typical void form insulation products, as it is a Dynamic Inclusion, mechanically responsive to expanding soils. Beaver has earned both U.S. and Canadian patents for the product.
DYNAVOID is designed to bear the weight of a very heavy structural slab until it has developed enough strength to become self-supporting. Long-term sustained stress from an expanding sub-grade then causes DYNAVOID to collapse due to thermoplastic creep. As the soils expand, the geometry of DYNAVOID converts this vertical strain into a horizontal deflection of supporting legs. Deflection continues until ‘over-center’ mechanical failure, with the collapsed leg segments nested together. A limited amount of simple compression will then continue to absorb sub-grade expansion as with ordinary void form foam materials.
DYNAVOID is produced in different performance ranges and in thicknesses of 100mm and 150 mm (4” or 6”), in 1220mm by 1220-mm (4’ x 4’) panels. The correct version must be selected to ensure the slab will be supported as well as creep and collapse should sub-grade expansion occur.
Frequently Asked Questions
What is DYNAVOID™ and what purpose does it serve?
DYNAVOID™ is a moisture-tolerant protective void form material designed for use under structural concrete, specifically engineered to respond to expanding soils.
How does DYNAVOID™ differ from typical void form products?
Unlike conventional void forms, DYNAVOID™ incorporates a Dynamic Inclusion that mechanically responds to soil expansion, providing enhanced support and stability.
What are the performance specifications of DYNAVOID™?
DYNAVOID™ is available in thicknesses of 100mm (4”) and 150mm (6”) and is produced in 1220mm x 1220mm (4’ x 4’) panels, tailored to bear the weight of heavy structural slabs.
What happens when the underlying soil expands?
When the sub-grade expands, DYNAVOID™ collapses due to thermoplastic creep, allowing for horizontal deflection of its supporting legs until mechanical failure occurs, while still absorbing some compression.
How do I select the correct version of DYNAVOID™ for my project?
Choosing the right performance range of DYNAVOID™ is crucial for ensuring proper slab support and accommodating any potential creep and collapse due to soil expansion.