1. APPLICATION
1.1 This application describes measurement of the
penetration rate of the KESSLER DCP (Dynamic Cone
Penetrometer) with a Single-Mass or Dual-Mass Hammer
and quick-connect Drive Rod in field soil testing using a
Vertical Scale.
1.2 The KESSLER DCP is driven into the soil by
dropping either a Single-Mass 17.6 lb (8kg) Hammer or a
Dual-Mass Hammer from a height of 22.6 in (575mm). To
convert the Dual-Mass Hammer from a 17.6 lb hammer to
a 10.1 lb Hammer, remove the hexagonal set screw and
the outer steel sleeve (as shown in Fig. 2). The outer steel
sleeve is designed to slide over the DCP handle for ease of
conversion during testing. The cone penetration caused by
one blow of the 17.6 lb (8 kg) hammer is essentially twice
that caused by one blow of the 10.1 lb (4.6 kg) hammer.
The 10.1 lb (4.6 kg) hammer is used in weaker soils having
a CBR value of 10 or less and can be used on soils up to CBR
80. The 17.6 lb (8 kg) hammer penetrates high strength
soils quicker. The depth of cone penetration is measured at
selected penetration or hammer drop intervals and the soil
shear strength is reported in terms of DCP index. The DCP
index is based on the average penetration depth resulting
from one blow of the 17.6 lb (8 kg) hammer. The average
penetration per hammer blow of the 10.1 lb (4.6 kg)
hammer must be multiplied by 2 in order to obtain the DCP
index value from the correlation equation in paragraph 4.
1.3 The KESSLER DCP can be used to estimate the
strength characteristics of fine and grained soils, granular
construction materials and weak stabilized or modified
materials.
APPLICATION
1
Thank you for your purchase of a Kessler DCP (Dynamic Cone
Penetrometer), licensed to Kessler Soils Engineering Products, Inc.
by the U.S. Army Corps of Engineers (Patent No. 5,313,825).
The Kessler DCP is a durable and reliable Penetrometer
designed for field soil testing and measuring.
