Dynamic Cone Penetrometer – DCP 

Silver Heavy duty DCP
Made in South Africa



Our Silver Heavy Duty DCP provides you the best results with the best durability.

Point : hardened to 60 rockwell (ws: 1,2379)
Other materials used on the heavy duty DCP parts:
en8 (ws: 080A24)
en9 (ws: 1,1203)
en19 (ws: 1,7225)

We supply the South African made DCP – Dynamic Cone Penetrometer

  • The Dynamic Cone Penetrometer is very useful for the testing of soil compaction and testing of soil strength attributes of penetrability.
  • The DCP test is used on-site for soil density tests; no samples need to be taken to a laboratory
  • The Dynamic Cone Penetrometer finds its application in geotechnical investigations to obtain information on the physical properties of soil and rock around a site to design earthworks and foundations for proposed structures and for repair of distress to earthworks and structures caused by subsurface conditions.
  • The DCP test is used to measure the resistivity of soils or backfill materials required for underground transmission lines, oil and gas pipelines.
  • The DCP is an in-situ tester to determine CBR of soil; it is a yardstick for the cell-tower site preparation as well as for trenching and laying of fiber optical cables.



The Dynamic Cone Penetrometer test finds use in a large variety of commercial applications, such as:


  • Cell Tower Site Preparation and Construction – DCP is used for soil compaction testing.
  • Trenching, Laying & Installation of Fiber Optical Cables – DCP is used for in situ density tests.
  • Cable Trenching, Pipe-Laying – DCP is used in Quality Control of soil compaction.
  • Trench Reinstatement – Use of DCP to control compaction of granular fill.

In Roads design the DCP is a practical test used for onsite measuring of road material strength. The test provides an indication of a material’s in-situ resistance to penetration. It is often used to determine subgrade strength. In road building the DCP test indicates that the material will be able to withstand higher wheel and axle loads before penetration into the surface occurs. If the cone penetrates quickly into the soil, it indicates that the material has poor strength or insufficient compaction has been achieved. Either thicker pavement layers might be necessary or compaction needs to be improved. The test results can be correlated with the California Bearing Ration (CBR) by applying a formula. It can save much time and money later by ensuring that the road is designed properly.

The hammer is 8 kilograms, fall distance is 575 mm and the tip/cone is 60°.
The DCP Dynamic Cone Penetrometer tester has four unit parts.
• One 8 kg Hammer,
• Upper Rod,
• 900 mm Ruler,
• Bottom Rod.

The long steel rod with a standard sized hardened steel cone is at the penetrating end. Its length is approximately one meter, but it can be extended by one meter extension rods. At the upper end of the steel bar is a captive weight surrounding the rod, this weight is able to fall freely through a given drop height to achieve a standard amount of penetrative effort at every drop. By measuring the penetration of the cone against the number of drops of the weight it is possible to plot resistance to penetration and indirectly the strength / compaction of the layer being tested.
A more technical description of the DCP:

The DCP works by using a 8 kg steel mass dropping 575 mm which hits the anvil. Each stroke causes penetration of a 20mm diameter cone (60° vertex angle) which sits at the base of assembly into the soil (underlying surface)

The ST6 technique for using the Dynamic Cone Penetrometer describes the rate of penetration of the DCP into a natural or compacted material (soil) with the help of the dropping weight (hammer). The penetration rate of the cone of the DCP is inversely proportional to the resistance level of the terrain. The DCP test is an in-situ CBR or density testing of the soil.

The Dynamic Cone Penetrometer is useful in assessing the density of a fairly uniform material by relating density to penetration rate (DN). Using this method under-compacted or “soft spots” of the Subgrade can be identified. The test is designed to evaluate the situ sturdiness substance. Compaction degrees of pavement subgrade are determined by means of in-place density testing. – The DCP can efficiently be applied in quality control of granular base layer compaction as well as during backfill compaction of pavement drain trenches.

It is possible to obtain an approximate CBR figure from the results of using this equipment by applying a simple formula. It is a guideline not a benchmark figure, but still useful to know that you are 90% correct.

Made in South Africa!sa_flag

There are a few schools of thought about where the Dynamic Cone Penetrometer also called the DCP test originated from.
The Dutch and Australians claim that they are the inventors of the Falling Weight Penetrometer (DCP).
The CSIR has nearly perfected it.

The DCP sold by RT Agencies is a wholly South African Product!



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