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|Evaluation of a 20-inch guarded hot-plate thermal conductivity apparatus range -50°F to +250°F
|Kaplar, Chester W.
Thermal conductivity tests
Thermal insulation tests
|Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
|Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 137.
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 +250°F to -50°F. 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.
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