NJDOT Research

NJ #
Implementation Plan for Alternatives to Nuclear Density Testing

The primary goal of this study was to develop an implementation plan for the Dynamic Cone Penetrometer (DCP) device and specifications. In an effort to reach this goal, two field demonstrations of the DCP were conducted for contractors and NJDOT personnel on active NJDOT job sites.  Each job site also conducted compaction quality testing using the nuclear density gauge (NDG) in order to evaluate the accuracy of the previously developed DCP compaction quality specifications. At the conclusion of each field demonstration, questionnaires were distributed to the attendees to obtain feedback regarding feasibility of implementation, difficulty of operation, overall quality of the demonstration, etc. Finally, a training video was developed for any additional personnel that was unable to attend the field demonstrations. This study showed success in introducing the DCP to relevant personnel as a majority of the personnel marked 4 out of 5 (5 being the highest) with regards to comfort in operating the DCP after training. Additionally, the DCP and NDG agreed in their compaction quality findings giving further validation to use and implementation of the DCP. Based on the feedback from the questionnaires, it was also recommended that a portion (or total) automation of the DCP would be preferable for widespread implementation due to physical requirements needed to operate the DCP device.

Performing Organization
Rowan University
Key Word(s)
Dynamic Cone Penetrometer (DCP), Implementation

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