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This article in SSSAJ

  1. Vol. 41 No. 6, p. 1055-1059
     
    Received: Apr 27, 1977
    Accepted: July 14, 1977


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doi:10.2136/sssaj1977.03615995004100060007x

Heat Transfer in Dry Aggregated Soil: I. Heat Conduction1

  1. A. Hadas2

Abstract

Abstract

The thermal conductivities of aggregated soils were determined experimentally in the laboratory. As expected the thermal conductivity decreases as the size of the aggregates and the total and interaggregate porosities increase. Good agreement between the measured and predicted thermal conductivity values, by two methods, was found only for small aggregates, but failed increasingly as the aggregate size increased. The discrepencies between measured and predicted values are discussed and are attributed to thermal contact resistance between the soil aggregates that increases as the size and the numbers of the contact points for the aggregates decreases.

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