Page 12 - Grp3-Soil magazine (Final-Vid ver)

PROCTOR TEST

The most common laboratory test for soil compaction. Which simulates the in-situ compaction processes
typically performed during construction of earth dams or embankments to derive the compressibility of
soils

Video for Proctor Test

TEST TO DETERMINE DRY UNIT WEIGHT
SANDCONE METHOD
1) field density measurement
The sand cone test is a cost-effective alternative
2) the core cutter method
to nuclear gauge testing used to determine if the
3) sandcone method
density of soil in place at a construction site
4) rubber ballon method
important test to perform because, if soil is not
5) nuclear method
the proper density, it could increase the rate of
settlement post-construction and compromise
structural support, potentially putting lives at
risk.

Video for Sancone, Rubber Ballon and
Nuclear Density method
Video for Sandcone Method

RELATIVE DENSITY OF SOIL
Fomula of Relative Density
Relative density or density index is the ratio of
the difference between the void ratios of a
cohesionless soil in its loosest state and existing
natural state to the difference between its void
ratio in the loosest and densest states.
e = void ratio of coarse grained soil (cohesionless) in its
max
loosest state.
min
e = void ratio of coarse grained soil (cohesionless) in its
densest state.
e = void ratio of coarse grained soil (cohesionless) in its
natural existing state in the field.
d
If I =1, soil is in densest state
Video for Relative Density
If I =0, soil is in loosest state
d
PAGE 12