Applying the dynamic cone penetrometer (DCP) design method to low volume roads

Abstract

The Dynamic Cone Penetrometer (DCP) has been in use since the 1950s for various applications in pavement investigation. During the 1980s, Kleyn and Van Zyl described a method for upgrading unsealed roads to light sealed road standard based on in situ testing using the DCP. Although this is a simple, cheap and effective method for assessing the bearing capacity of in situ materials for the design of new roads or the upgrading of unsealed or existing sealed roads, a fundamental understanding of the in situ conditions is essential. A number of methods of use have been described and applied for the use of the DCP for the design of low volume roads, but no comprehensive method has been published. This paper summarizes the fundamentals, investigation, analysis and design techniques for application of this very useful and cost-effective design method taking into account the prevailing material, traffic and environmental conditions. Use of the method is illustrated by two actual design examples.