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Earthworks Manual - Specific technical developments - 2B - Treatment of materials

2B - Treatment of materials

The Booklet 2B downloadable on this page deals with the treatment of materials.
This technique is increasingly carried out to optimize the use of materials under economically advantageous conditions.
For Earthworks, the process involves the treatment of natural soils and weak rocks, as well as recycled or artificial materials.

The most developed techniques are:

  • short-term soil improvement, applied in particular for excavated materials.
  • medium- and long-term stabilisation, generally applied to capping layers and pavement subbases

The treatment products considered are mainly lime and/or hydraulic binders.

The choice of the treatment solution is based on economic and geotechnical studies. The process is defined according to a multi-stage formulation study. An assessment of the suitability of the material for treatment is essential.

The soil treatment technique is described for the construction of embankments and capping layers. The use of the appropriate equipment, among the range described in this Booklet, is essential for the execution of the project.

The various recommended controls are also discussed.


PART 1 - General considerations
PART 2 - Specific technical development

2A / Materials
2B / Treatment of materials
2C / Earthworks project
2D / Earthworks execution and controls
2E / Environmental aspects

Information sheet

  • Date: 2021
  • Domain(s): Road Earthworks
  • Type: 2B - Treatment of materials
  • PIARC Ref.: 2021R02BEN
  • ISBN: 978-2-84060-643-7
  • Number of pages: 159