Dynamic cone penetration test

The Dynamic Cone Penetrometer DCP is an instrument designed for the rapid in-situ measurement of the structural properties of existing road pavements constructed of unbound materials. The robust and simple design means that the DCP is quick and easy to use, portable, low cost and suitable for use in locations where access may be difficult. This article discusses the history of the test, the safety concerns and geotechnical design limitations of the DCP in modern practice and provides alternative methods which must be considered by the Designer. The original DCP used a 15 lb weight dropping over 20 ins and used a 40 o cone. This DCP was originally developed for field exploration and for verifying individual footing foundations during construction. The DCP was further developed in South Africa for the evaluation of in-situ pavement strength or stiffness of newly constructed roads in the s.
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17.04.2020
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What is Dynamic Cone Penetrometer(DCP)? [PDF]

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What is Dynamic Cone Penetrometer(DCP)? [PDF]

The Dynamic Cone Penetrometer, or DCP, is one of the most efficient and effective tools available for evaluating the strength of soils on site. It is also used to monitor the condition of granular layers and subgrade soils in pavement sections over time. Tensar and our partners routinely use the DCP testing tool to help our customers determine the right solutions for their sites, especially when soft soils are involved. To use the device , the hammer is raised to the top of the rod and released in order to drive the rod into the ground.
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Dynamic Cone Penetrometer (DCP) PANDA® Overview

It has so much more capability than a standard DCP and overcomes the safety issues. For deep or repetitive tests in the mid range of operation, a one person operated electric automatic hammer is available as an alternative to using the 1. Now you can see real time when doing the test if your material is within specification or not.
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It is similar to CPT cone penetration testing in that a metal cone is advanced into the ground to continuously characterize soil behavior. In DCP, however, the cone is driven by a standard amount of force from a hammer, and how far the cone moves with each blow is used to determine the soil density and properties at that level. In DCP testing, the pushing force is applied by manually dropping a single or dual mass weight called the hammer from a fixed height onto the push cone unit. The resulting downward movement is then measured.
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