Alchemy-Spetec Blog

Lifting Foam Density and Expansion

Posted by Andy Powell on Apr 12, 2019 1:16:58 PM
Lifting Foam Density and Expansion
Lifting Foam Density and ExpansionToday I'd like to discuss a little "foam 101" info that addresses some commonly asked questions I get from slab lifting customers:

Density and Expansion

The most common slab lifting foams we sell are AP Lift 430, AP Lift 440, and AP Lift 475. Each foam has a different density and load-bearing capacity. They also have different expansion properties. The higher the density of foam, the lower the amount of expansion (yield). All of the properties on the datasheets are based on lab conditions and free rise foam compression and density testing.  Free rise means foam that is allowed to expand in an unconfined state. When foam expands in a confined space, the densities and strengths increase rapidly.

Technical Data for Each AP Lift Foam

AP Lift 430 
Expansion = 24x
Yield = 3.2 cubic ft / gallon
Density = 3 lb per cubic ft
Bearing capacity = 7000 psf
Applications: Void fill, Residential Slabs, Light Commercial, some DOT
AP Lift 440 
Expansion = 17.5x
Yield = 2.4 cubic ft / gallon
Density = 4 lb per cubic ft
Bearing capacity = 11000 psf
Applications: Commercial / Industrial Slabs, Bridge Approaches, DOT
AP Lift 475 
Expansion = 14-15x
Yield = 2.0 cubic ft / gallon
Density = 4.75 lb per cubic ft
Bearing capacity = 14000 psf
Applications: Industrial, Airport, Rail, DOT, Sinkhole Remediation, Infrastructure Sealing

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Topics: All Posts, Lift Slabs