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A platform for research: civil engineering, architecture and urbanism
Thermal conductivity of concrete at very low temperatures
Theory and practical application of nonsteady-state "hot-wire" method for measuring thermal conductivity of concrete at temperatures ranging from -250 to 75 F are discussed; thermal conductivities of rock specimens were also determined by use of "split-specimen" technique especially developed for such measurements; thermal conductivities of sand and gravel concrete containing 5.5 bags of cement/cu yd of concrete ranged from 32 Btu/ (hr) (sq ft) (F/in.) at -250 F to 23 at 75 F for moist concrete, and ranged from 25 at -250 F to 19 at 75 F for concrete equilibrated at 50% relative humidity.
Thermal conductivity of concrete at very low temperatures
Theory and practical application of nonsteady-state "hot-wire" method for measuring thermal conductivity of concrete at temperatures ranging from -250 to 75 F are discussed; thermal conductivities of rock specimens were also determined by use of "split-specimen" technique especially developed for such measurements; thermal conductivities of sand and gravel concrete containing 5.5 bags of cement/cu yd of concrete ranged from 32 Btu/ (hr) (sq ft) (F/in.) at -250 F to 23 at 75 F for moist concrete, and ranged from 25 at -250 F to 19 at 75 F for concrete equilibrated at 50% relative humidity.
Thermal conductivity of concrete at very low temperatures
Portland Cement Assn -- Research Development Laboratories -- J
Lentz, A.E. (author) / Monfore, G.E. (author)
1965
8 pages
Article (Journal)
English
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