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You are here: Home / Pavement and Foundation / Base Course and Sub Base Course of Rigid Pavement

Base Course and Sub Base Course of Rigid Pavement

October 4, 2013 by admin Leave a Comment

Sub Base Course of Rigid Pavement

This is the layer (or layers) under the base layer. The properties and function of this layer are similar to those under flexible roads/pavements. A sub-base is not always needed and therefore may often be omitted.

typical detail of road section base course rigid pavement
Click on the Image to enlarge

Base Course of Rigid Pavement

This is the layer directly below the PCC layer and generally consists of aggregate or stabilized sub-grade.

  • It provides additional load distribution, contributes to drainage, uniform support to the pavement and a stable platform for construction equipment.
  • Bases also help prevent sub grade soil movement due to slab pumping.

Base courses are usually constructed out of

  1. Aggregate base.
  2. Stabilized aggregate or soil.
  3. Dense-graded Hot Mix Asphalt.
  4. Lean concrete.

Filed Under: Pavement and Foundation

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