Title: Thermal Properties of Sandwich Panels

Author(s): Calvin W. McCall

Publication: Concrete International

Volume: 7

Issue: 1

Appears on pages(s): 35-41

Keywords: concrete panels; heat transfer; sandwich structures; shear connectors; thermal conductivity; thermal properties; thermal resistance; thermal transmittance.

DOI:

Date: 1/1/1985

Abstract:
When excessive quantities of shear reinforcing and solid concrete blocks penetrate the insulation in a sandwich panel, significant quantities of heat escape through these shear connectors. In some cases, the U-value may be increased by as much as 230 percent when excessive shear reinforcing is used. A simple method of calculating the theoretical U-value of a sandwich panel to account for heat losses through the shear connectors is demonstrated. The U-values of several different panel designs are compared to indicate the thermal efficiency of those designs.