Term of the Road Dictionary

pumping

  • Language : PIARC Road Dictionary / English
  • Theme : Operations Asset Management and Maintenance Maintenance
  • Definition : Phenomenon by which water entrapped at the interface between a concrete slab and its subbase layer is ejected by the deflection of slab edges as heavy vehicles pass over. Note: in some cases fines from within the pavement structure are entrained with the ejected water, which in time may result in cavities under the slab.

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