Thermal conductivity and other properties of cementitious grouts

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The thermal conductivity and other properties cementitious grouts have been investigated in order to determine suitability of these materials for grouting vertical boreholes used with geothermal heat pumps. The roles of mix variables such as water/cement ratio, sand/cement ratio and superplasticizer dosage were measured. In addition to thermal conductivity, the cementitious grouts were also tested for bleeding, permeability, bond to HDPE pipe, shrinkage, coefficient of thermal expansion, exotherm, durability and environmental impact. This paper summarizes the results for selected grout mixes. Relatively high thermal conductivities were obtained and this leads to reduction in predicted bore length and installation costs. Improvements ... continued below

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15 p.

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Allan, M. August 1, 1998.

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Description

The thermal conductivity and other properties cementitious grouts have been investigated in order to determine suitability of these materials for grouting vertical boreholes used with geothermal heat pumps. The roles of mix variables such as water/cement ratio, sand/cement ratio and superplasticizer dosage were measured. In addition to thermal conductivity, the cementitious grouts were also tested for bleeding, permeability, bond to HDPE pipe, shrinkage, coefficient of thermal expansion, exotherm, durability and environmental impact. This paper summarizes the results for selected grout mixes. Relatively high thermal conductivities were obtained and this leads to reduction in predicted bore length and installation costs. Improvements in shrinkage resistance and bonding were achieved.

Physical Description

15 p.

Notes

OSTI as DE98006069

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  • Other Information: PBD: [1998]

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  • Other: DE98006069
  • Report No.: BNL--65640
  • Grant Number: AC02-98CH10886
  • DOI: 10.2172/656568 | External Link
  • Office of Scientific & Technical Information Report Number: 656568
  • Archival Resource Key: ark:/67531/metadc706058

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Office of Scientific & Technical Information Technical Reports

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  • August 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 13, 2015, 11:24 p.m.

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Allan, M. Thermal conductivity and other properties of cementitious grouts, report, August 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc706058/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.