A Proven Energy Efficient System
- Test panels were constructed of concrete, rebar, wire mesh, expanded polystyrene insulation, and panel ties.
- Department of Civil Engineering, University of Missouri–Rolla.
- Flexible Tests:
The test establishes limits for horizontal loads, wind forces, seismic forces.
Grid in Tension: Ultimate strength for Flexure Test (average) — 31.4 Kips
Grid in Compression: Ultimate strength for Flexure Test (average) — 57.6 Kips
Note: GibbarWALL panels responded with compression strength in excess of 100 Kips per linear foot. The 2-inch, non-structured wythe was not intended for structural strength although it did improve the structural behavior of the panels.
- Vertical Eccentric Compression Tests:
The test establishes the bearing capacity and service limits.
Strong side: Ultimate strength on slab grid side — over 600 Kips
Note: None of the panels failed at the maximum capacity of the machine of 400 Kips. It was theoretically estimated that the columns by themselves would provide a capacity of more than 420 Kips. Depending on the composite behavior of foam/concrete, an enormous additional compression capacity could be achieved from both slabs resulting in capacities over 600 Kips.
The test proves bond strength between concrete and EPS foam. It also tests bearing shear capacity of the plastic connectors.
Ultimate strength (average) — 50.5 Kips
Shear resistance at the concrete/foam — 11 PSI (50,000 lbs. required to break the bond) and a shearing displacement of 0.5 inches over the 12-inch depth.
1 Kip = 1000 lbs.
Kips = Thousands of pounds
KSI = 1 Kip per square inch (1000 psi)