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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
"Vision Survey have 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."
Nathan Pickering, Regional Operations Lead – Vision Survey
"I thoroughly recommend the expertise of Mark and the team – trustworthy and valuable advice in a quick timeframe for my project.”
A. Prior – Landowner
“Just wanted to say that I was very impressed with the site team this week. The site engineer showed great leadership on site, delivering the works on time, and kept us updated with daily diaries and updates throughout. The engineer also promptly provided me with certifications for all of the drilling rigs and equipment the guys were using without me having to ask for it, which isn’t typical of all of our subcontractors!”
Lewis Brown, Site Manager Projects – The Clancy Group
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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.