Redrow Homes
Key Works
Chalk Stabilisation
Date / Duration
August 2019 / 12 wks
Cut/Fill Volume
Chalk Stabilisation
MSE Structure
Max Height – 9.6m
Length – 105m

Appointed to work with Maccaferri to provide the specialist earthworks and stabilisation of chalk arisings for a mechanically stabilised earth (MSE) structure as part of a new housing development.

Project challenges / GDL solutions

  • Cement stabilisation of chalk is non-routine in such applications since achieving structural grade compaction of the chalk is not straightforward given the material’s propensity to degrade under excessive compaction.
  • In determining the strength characteristics for the materials, we collected samples from site, prepared stabilised samples in our laboratory and utilised our tie-up with Strathclyde University to undertaken large shear box tests on the stabilised chalk. We also undertook a compaction study in our own laboratory in order to develop a workable specification.

Project benefits for the client

  • The chalk material was originally scheduled for offsite / landscaping with a replacement import material required and thus the economic & environmental savings for the project were substantial.
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