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

Surface Course of Rigid Pavement

October 4, 2013 by admin 1 Comment

Surface Course of Rigid Pavement

The surface course is the layer in contact with traffic loads. It consists of the PCC slab which is the stiffest layer and provides the majority of strength.

pcc surface course of rigid pavement
PCC Surface Course of Rigid Pavement
  1. The surface course can vary in thickness but is usually between 150 mm (for light loading) and 300mm (for heavy loads and high traffic).
  2. Portland cement concrete is the “white stuff” used as pavement material.

How Portland Cement and Portland Cement concrete is made ?

  1. Portland cement is made by heating shale, limestone and small amounts of iron-ore to very high temperatures.
  2. It is then cooled and ground into a fine powder.
  3. Gypsum is added to the powder to keep the powder from hardening instantly when water is added.
  4. Portland cement concrete is made by mixing portland cement with water, and coarse and fine-size rocks.
  5. All the materials, including the right amount of air bubbles, must be in the correct proportions in order for the mixture to harden properly.
  6. A properly mixed concrete has all the rock pieces completely coated all the way around each piece.
  7. It initially can be more expensive.
  8. The life expectancy of portland  cement pavement varies, as little as 20 years or more than 40 years.

Filed Under: Pavement and Foundation

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Comments

  1. Sudipta Mazumder says

    February 2, 2021 at 1:05 pm

    Which materials are used to constitute wearing course of a rigid pavement?

    Reply

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