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Journal of the Indian Society of Soil Science
Year : 1971, Volume : 19, Issue : 1
First page : ( 5) Last page : ( 10)
Print ISSN : 0019-638X. Online ISSN : 0974-0228.

Effect of Varying Bulk Densities on the Thermal Characteristics of Lateritic Sandy Clay Loam Soil

Ghildyal B. P.*, Tripathi R. P.

Indian Institute af Technology, Kharagpur, West Bengal

* Present Address: U.P. Agricultural University, Pant Nagar, Nainital (U.P.)

Abstract

Specific heat of soil was 0.23 cal g−1°C−1, as determined by the radiation calorimeter. Unsteady stare method of heat conduction in one dimension was followed in the study of the thermal conductivity. Thermal conductivity increased exponentially with the increase in bulk density, volumetric heat capacity and degree of saturation; it decreased exponentially with the increase in void ratio and porosity. Volumetric heat capacity followed positive linear relationship with bulk density and parabolic relationship with the degree of saturation. Thermal diffusivity increased exponentially with increasing bulk density, volumetric heat capacity and degree of saturation and positive linearly with the thermal conductivity. At a constant heat flux, the amplitude of temperature variation decreased with depth. As density increased, gradient of temperature with depth decreased. Temperature amplitude was high at the surface of the loose soil than the compacted one.

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Keywords

Thermal characteristics, lateritic soil, soil bulk density.

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