Some tests on the compactibility and hardness after compaction of different types of snow
Compaction of different types and mixtures of snow including snow collected from the natural snow cover and waste from an ice milling machine, was carried out in a cold room with a small model compactor. Density, cone hardness and shear strength were measured, generally 24 hours after compaction, fo...
| Published in: | Journal of Glaciology |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1965
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| Subjects: | |
| Online Access: | https://doi.org/10.3189/S0022143000018591 https://nrc-publications.canada.ca/eng/view/ft/?id=c9eb3c5e-73dc-42e3-abd4-1d3f47b07f11 https://nrc-publications.canada.ca/eng/view/object/?id=c9eb3c5e-73dc-42e3-abd4-1d3f47b07f11 https://nrc-publications.canada.ca/fra/voir/objet/?id=c9eb3c5e-73dc-42e3-abd4-1d3f47b07f11 |
| Summary: | Compaction of different types and mixtures of snow including snow collected from the natural snow cover and waste from an ice milling machine, was carried out in a cold room with a small model compactor. Density, cone hardness and shear strength were measured, generally 24 hours after compaction, for specimens compacted in different ways. When the snow was compacted to maximum, densities between 0.55 and 0.60 g./ cm(3) were achieved, except for mixtures including more than one third new snow for which densities were lower. For snow collected from the natural cover the highest hardness values after compaction, were found for new snow and for mixtures including more than 50 per cent of new snow or fine-grained granular snow. The maximum hardness was obtained with specimens prepared from fine-grained mill waste. The influence of temperature on density and hardness was also studied. On a procédé dans une chambre froide avec un compacteur petit modèle, au compactage de différents types et mélanges de neige recueillis dans la couverture de neige naturelle. La densité, la dureté determinée au cône et la résistance au cisaillement ont été mesurées généralement 24 heures après le compactage pour des spécimens compactés de facons diffé rentes. Lorsque la neige était compactée au maximum des densités allant de 0,55 à 0,60 g/cm(3) étaient obtenues, sauf dans le cas des mélanges comprenant plus d'un tiers de neige nouvelle pour lesquels les densités étaient plus faibles. Les plus hautes valeurs de dureté après le compactage ont été trouvées pour de la neige récente et pour des mélanges comprenant plus de 50% de neige récente ou de neige à granulation très fine. L'influence de la tempé rature sur la densité et la dureté a également été étudiée. Peer reviewed: Yes NRC publication: Yes |
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