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- W254867456 abstract "Thermal diffusivities of dense samples of Pomona basalt from core holes DB-5 and DB-15 were calculated between 25/sup 0/C and 300/sup 0/C from measured values of thermal conductivity, thermal expansion, and specific heat. The bulk densities and apparent porosities of the samples studied ranged from 2.86 to 2.88 g/cm/sup 3/, and 0.50 to 0.60%, respectively. Experimental values of thermal conductivity, linear thermal expansion, and specific heat were determined with a steady-state, cut-bar apparatus, a dilatometer, and a drop calorimeter, respectively. The thermal conductivity of Pomona basalt from core holes DB-5 and DB-15 increases with increasing temperature. The experimental conductivity data for these samples of Pomona basalt are adequately represented by the equations: (1) k = (2.4 x 10/sup -3/)T + 3.52; and (2) k = (2.5 x 10/sup -3/)T + 3.79, respectively. Thermal expansion data suggest that the tested samples of Pomona basalt expand linearly between 100/sup 0/C and 300/sup 0/C; the expansion coefficients for these samples are in the range 2.0 to 3.0 x 10/sup -6///sup 0/C. There are no significant differences in the values of relative enthalpies measured by drop calorimetry for Pomona basalt from core holes DB-5 and DB-15. Consequently, the specific heats as a function ofmore » temperature of both basalts are identical. A Maier-Kelley equation which represents the specific heat of Pomona basalt between 25/sup 0/C and 350/sup 0/C was derived from the relative enthalpy measurements: Cp = 0.306216 - (2.58056 x 10/sup -5/)T - (1.15331 x 10/sup 4/)T/sup -2/. The calculations of thermal diffusivity for the samples of Pomona basalt from core holes DB-5 and DB-15 imply a small decrease in diffusivity as a function of temperature between 25/sup 0/C and 300/sup 0/C. The approximate range of diffusivity values for these samples of basalt calculated between 25/sup 0/C and 300/sup 0/C is 8.0 to 5.8.« less" @default.
- W254867456 created "2016-06-24" @default.
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- W254867456 date "1980-01-01" @default.
- W254867456 modified "2023-09-27" @default.
- W254867456 title "Thermal property measurements of Pomona member basalt from core holes DB-5 and DB-15, Hanford site, southeastern Washington" @default.
- W254867456 hasPublicationYear "1980" @default.
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