CCV Testing: Chalk Crushing Value for Fill and Road Construction
The CCV (Chalk Crushing Value) test is a chalk-specific compaction/crushing assessment used to help determine whether chalk is suitable for use as engineering fill or in road construction. It is similar in principle to the MCV (Moisture Condition Value) test and uses the same portable equipment—making it practical for both laboratory programmes and project-led assessment.
Because CCV is designed specifically for chalk, the test is performed on the 10–14 mm fraction. Coarser particles are crushed down to this size to prepare a representative 1 kg test portion. The sample is then compacted/crushed and the relationship between number of blows and penetration is recorded. In the UK, the CCV is determined using the steepest section of the slope on a log-scale plot of blows versus penetration.
Why CCV testing matters
CCV testing helps you understand whether a chalk will break down excessively under compaction and trafficking. Stronger, more durable chalks are more likely to perform well as fill and in pavement layers, while weaker chalks can degrade, soften, and lose strength—creating long-term performance risk.
Typical CCV result bands
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0.1–0.3 – Strong chalk
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0.3–0.6 – Medium strength chalk
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> 0.6 – Weak chalk
Why choose The Testing Lab PLC?
At The Testing Lab PLC, we provide dependable CCV testing with clear, decision-ready reporting to support material approvals, earthworks decisions, and road construction suitability—helping you manage chalk risk early and keep projects moving.
Need CCV testing? Contact The Testing Lab PLC to discuss your chalk samples and turnaround.
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