BS 1881-124 Hardened Concrete Analysis: What’s in the Concrete You’ve Already Built?
BS 1881-124:2015 (updated with A1:2021) is used to analyse hardened concrete taken from an existing structure (typically cores) to determine its mix composition and key chemical properties. It’s one of the few recognised methods that helps engineers “reverse engineer” concrete after placement—ideal when records are missing, incomplete, or disputed.
This standardised analysis can determine:
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Cement and aggregate content
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Aggregate grading and original water content
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Type of cement/aggregate (where applicable)
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Durability indicators including chloride, sulphate, and alkali content—supporting assessments of corrosion risk, sulphate attack, and ASR potential.
Why choose The Testing Lab PLC?
At The Testing Lab PLC, we turn complex concrete chemistry into clear, decision-ready reporting. Whether you’re investigating defects, verifying compliance, supporting insurance/legal cases, or designing repairs/strengthening, our consistent methods and practical interpretation help you act with confidence—fast.
Need BS 1881-124:2015 testing? Contact The Testing Lab PLC to discuss sampling, scope, and turnaround.
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