Evaluation of a 20-Inch Guarded Hot-Plate Thermal Conductivity Apparatus Range -50 Degrees F to +250 Degrees F.
Abstract
A new custom-made guarded hot-plate thermal conductivity test apparatus capable of accommodating two 20 x 20-in. specimens up to 3 in. thick is described. The apparatus was designed for testing materials ranging from thin, rigid, foamed thermal insulations to 3-in.-thick pavement sections of asphaltic or portland cement concrete, with a 1-ft-sq metered area. The effective temperature range of the apparatus is from +250F to -50F. Some performance test data on a calibrated gum rubber specimen and results of evaluation tests on a frozen wet sand are presented. The k-values obtained for the frozen sand compare well with those obtained by other techniques. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1971
- Accession Number
- AD0727668
Entities
People
- Chester W. Kaplar
Organizations
- Cold Regions Research and Engineering Laboratory