ASTM D6951
Full Name
ASTM D6951 – Standard Test Method for Use of the Dynamic Cone Penetrometer in Shallow Pavement Applications
Scope
ASTM D6951 outlines a procedure for evaluating the structural integrity of unbound and lightly bound pavement materials. This method uses the Dynamic Cone Penetrometer (DCP), a portable instrument that measures the penetration resistance of pavement layers under impact loading.
The DCP consists of a cone-shaped tip attached to a rod that is driven into the pavement by a hammer dropped from a consistent height. The depth of penetration for each hammer blow is recorded, providing a relationship between penetration depth and the number of blows. This data is then used to calculate the Dynamic Cone Penetrometer Index (DCPI), representing the material’s resistance to penetration and thus, its strength.
Applications of ASTM D6951:
- Assessing the in-place strength of pavement layers: the test helps determine if existing layers meet the required strength for their intended use.
- Evaluating compaction quality: DCP testing can verify if newly constructed or repaired pavements achieve the desired level of compaction.
- Monitoring pavement performance over time: regular testing allows for tracking changes in pavement strength, aiding in timely maintenance and rehabilitation decisions.
- Correlating DCP results to other pavement properties: the DCPI values can be empirically correlated with other pavement characteristics like California Bearing Ratio (CBR) and modulus values, providing a comprehensive understanding of the pavement’s structural properties.
Advantages of the DCP test:
- Rapid and cost-effective: the portable nature of the equipment and the straightforward test procedure make it a quick and economical option for pavement evaluation.
- Minimal disturbance to pavement: the test causes minimal disruption to the pavement structure, making it suitable for in-situ assessments.
- Applicable to a range of materials: the standard is applicable to various unbound and lightly bound materials commonly used in pavement construction.
ASTM D6951 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM D6951 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
dynamic cone penetrometer; pavement; in-situ testing; soil strength; bearing capacity; modulus; compaction; subgrade; unbound materials; penetration rate; pavement density; shallow foundations; road construction; deflection; california bearing ratio