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Water Blown Soil Stabilization Foam

Posted in: Got Formula! by admin on September 10, 2010 | No Comments

The goal of the project is to develop a 115 psi compressive strength free rise polyurethane foam.  In the formulation database was a 4.75 pcf polyurethane formula that already had 92 psi compressive strength.  We hypothesized that by increasing the density by 1 pcf, we would meet the target.  The GoFormulate™ simulator was used to determine the amount of water needed to make a 5.75 pcf density.  After reducing the amount of water, the polyol blend needed readjustment to maintain the isocyanate index and the required 1:1 ratio by volume.  This precalculation was done in less than 10 minutes.  The polyol component was made and a foam was made for testing.  The experimental density was 5.74 pcf.  The compressive strength was 123 psi after 18 hrs.  This demonstrates once again the speed and accuracy with which foam formulations can be made using the GoFormulate™ simulation tool.

High Density Injectable Foam

Posted in: Got Formula! by admin on August 22, 2010 | No Comments

This formula is targeted for tunnel stabilization.  It was developed in 30 minutes from the start of simulation to the testing of the formula.  Density was 55 pcf.  The foam had a cream time of 6 minutes and tack free in 8 minutes.