Contact Us
Buried Concrete Attack
Buried concrete can be attacked by chemicals within the soil. This can lead to a reduction in strength and a shortened lifespan of the asset. It is therefore important to determine the aggressiveness of the ground so that the concrete mix to be designed appropriately.
Much of the UK is underlain by soils that contain sulphates or sulphides (e.g. pyrite) that can oxidise to become sulphates. It is principally these substances that cause the chemical attack on buried concrete. Other substances also attack the concrete including chloride and magnesium.
We undertake a holistic assessment of a site to characterise the aggressiveness of the ground. This allows a safe design to be undertaken without being overly conservative.
Initially, we review geological maps to determine the likelihood of encountering soils containing pyrites. We also review historical maps to determine if the site has been used for industrial purposes in the past and is, therefore, a ‘brownfield’ site.
Following the initial review we undertake a ground investigation which includes sampling of the soil and laboratory testing. We analyse the results to determine a Design Sulphate Class and an ACEC (Aggressive Chemical Environment for Concrete) Class. This then allows the foundation designer to specify the correct concrete mix with additional protection measures where appropriate.
What Our Clients Say
Matthew Hill – Project Manager, Southwark Council.
“Soiltechnics has provided a range of soil reports, ground investigation surveys, remediation strategies and verification reports for parks and open space improvement projects in Southwark. They have also provided clear and concise expert advice on ground/soil related issues which have occurred during the construction phase. Soiltechnics is a valued, reliable consultant we will continue to approach for similar schemes.”
Gavin Williams – Senior Pre Construction Surveyor, Willmott Dixon Construction Ltd.
“Having worked with Soiltechnics for almost ten years, they are considered a trusted member of our supply chain. Soiltechnics completed a robust selection process which highlighted their ability to perform with the utmost professionalism in regards to customer service, value for money and site safety. It is trusted consultants like Soiltechnics who we can depend on in our pursuit to provide the perfect product for our customers.”
Nathan Pickering – Regional Operations Lead, Vision Survey.
“Vision Survey has worked with Soiltechnics for several years, initially forging a strong working relationship with their Manchester office, which has since expanded to include our respective southern offices. We appreciate their excellent professional conduct, their collaborative working approach and ultimately, in knowing that we can rely on them to meet our requirements.“
Get in touch with us
We work with clients of all sizes, from developers, building contractors, private companies, local authorities and individuals, on a wide variety of projects spanning major infrastructure, commercial, residential, educational, land development and restoration.