Structural Testing

A Proven Energy Efficient System

Overview

• Test panels were constructed of concrete, rebar, wire mesh, expanded polystyrene insulation, and panel ties.

Tested by

• Department of Civil Engineering, University of Missouri–Rolla.

Results

• 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.
• Shear Test:
  • 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)