Dynamic Cone Penetrometer (DCP)
The Dynamic Cone Penetrometer (DCP) is an instrument designed for the rapid in-situ measurement of the structural properties of existing road pavements constructed with unbound materials.
Continuous measurements can be made down to a depth of 850mm, or deeper when extension rods are fitted.
The DCP requires three operators: one to hold the instrument, one to raise the weight and one to record the results.
- Well proven, robust design
- Made in England
- Fully plated
- Portable and easy to operate
- Tests can be carried out in minutes
Specification
Standard kit
- Drop weight: 8kg
- Drop height: 575mm
- Hardened cone: 60°
- Testing depth: 850mm
Dimensions
- Case size: approximately 110 x 25 x 15cm
- Weight: approximately 22kg
Optional extras
- 1m extension rods with incremental measurement lines
- Alternative drop weights, such as 6kg or 10kg
How the DCP test works
The cone is driven into the ground by repeatedly dropping the 8kg weight from a fixed height of 575mm. After each blow, or set of blows, the depth of penetration is read from the graduated rod and recorded. The rate of penetration in millimetres per blow shows the strength of each layer, and is commonly correlated with the California Bearing Ratio (CBR) to assess subgrade and sub-base strength.
Typical applications
- Assessing existing road pavements and unbound layers
- Checking subgrade strength before construction
- Site investigations for roads, car parks and hardstandings
- Quality control of compacted fill
For prices or more information on our Dynamic Cone Penetrometer, please contact TT Precision Engineering Limited.