Term of the Road Dictionary

mattress effect

  • Language : PIARC Road Dictionary / English
  • Theme : Roads Construction Earthworks
  • Definition : Creation of a wave that advances in front of a compactor afer several passes on fine soil with clay or silt or on granular material that contains too much moisture. Notes: 1. The phenomenon is due to elastic behaviour. Proper compaction cannot be obtained without reducing the moisture content. 2. This may also occur with too rich a bituminous mixture.
  • Synonyms : bow wave / cushioning (US)

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