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Effectiveness of rigid insulation for thermal protection of buried water pipes in rock trenches

Par Conseil national de recherches du Canada

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AuteurRechercher : 1; Rechercher :
Affiliation
  1. Conseil national de recherches du Canada. Institut de recherche en construction du CNRC
FormatTexte, Article
Conférence27th Annual CSCE Conference, Cold Regions Engineering Specialty Conference: 03 June 1999, Regina, SK., Canada
Sujetlatent heat, frost penetration, insulation, buried pipes, rock trenches; Conduites d'eau
Résumé
Laboratory tests were conducted to investigate the effect of latent heat on frost penetration in backfill specimens. Each specimen was prepared and placed in PVC moulds, which represent a rock trench. Rigid polystyrene insulation boards and expanded polystyrene beads were used in some specimens. The specimens were then subjected to a sudden temperature drop from 22oC to -15oC. The preliminary study showed that high moisture content backfill materials had a lower cooling rate and a longer time plateau around the freezing point than low moisture content ones because of the low thermal diffusivity and the release of latent heat. The use of polystyrene insulation actually promoted a faster frost penetration than without the insulation. The study shows that the rigid insulation was not effective in delaying frost advance to the centre of the specimens.
Date de publication
Langueanglais
Publications évaluées par des pairsOui
Numéro du CNRCNRCC 43093
NRC-IRC-9557
Numéro NPARC20331212
Exporter la noticeExporter en format RIS
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Identificateur de l’enregistrement3b151201-8483-4ad1-9ba9-7fc9ef24c7e9
Enregistrement créé2012-07-18
Enregistrement modifié2020-03-20
Date de modification :