DGSI. Durham Geo Slope Indicator

Corps of Engineers Single- and Dual-Mass Cone Penetrometers

The U.S. Army Corps of Engineers has developed two cone penetrometers to measure CBR values from 1 to 100. These devices are similar to the one used in South Africa since the 1970s. The dual mass version drops an 8 kg mass a distance of 575 mm onto an anvil driving a 60° cone with a maximum diameter of 20 mm. When used in weaker subgrades having a CBR value less than 10, a part of the driving mass is removed resulting in a 4.6 kg falling mass. The cone penetration caused by one blow of the 8 kg mass is essentially twice that caused by the 4.6 kg mass. Typical blow counts for 25 mm increments are recorded. The Corps has developed a correlation between CBR and mm/blow (referred to as the Penetration Index).

The Single Mass Cone Penetrometer has a fixed 8 kg mass and is recommended for pavement sections with anticipated CBR values between 10 and 100.

The Single-Mass Cone Penetrometer kit (S-216) includes the Upper Assembly w/ 8 kg hammer, 37.75 in hardened point, oil, wrenches, pens and user's manual with CD.

The Dual-Mass Cone Penetrometer includes a dual-mass hammer assembly, 30 in drive rod, 40 in vertical scale w/ foot and upper attachment, hardened point. cone adapter, 25 disposable cones,  assorted hand tools, carrying case, user’s manual and CD.

Model Description
S-216 Single-Mass COE Cone Penetrometer
S-218 Dual-Mass COE Cone Penetrometer

Related Item:

Dynamic Cone Penetrometer