this is a poster presentation by group 9 students of university of maiduguri, department of civil and water resources engineering. under the course Soil mechanics on the topic compaction test.

1. INTRODUCTION
OBJECTIVES
COMPACTION TEST
PROCTOR MOULD
PROCTOR RAMMER
WEIGHING BALANCE/ SENSITIVE
EXTRUDER
TRAY, SCOOP, AND MIXING TOOLS
DRYING OVEN
GRADUATED CYLINDER
✓ To increase strength and stability.
✓ To decrease permeability.
✓ To enhance resistance to erosion.
✓ Decrease compressibility under
load and minimize settlement.
▪ Compaction is the process of increasing
the bulk density of a soil or aggregate by
driving out air only.
▪ For any soil at a given compactive effort,
the density depends on the moisture
content.
▪ For any soil, an “optimum water content”
exist at which it will achieve its maximum
density.
▪ Reduced proctor, RP, 15blows, 2.5kg, 3layers.
▪ Modified proctor, MP, 25blows, 4.5kg, 5layers.
▪ Standard proctor, SP, 25blows, 2.5kg, 3layers.
MEMBERS
▪ The most common laboratory test for soil
compaction is the Proctor compaction test.
▪ The Proctor test was invented in the 1930s
by R. R. Proctor, a field engineer for the
Bureau of Waterworks and Supply, in Los
Angeles, California.
CONCLUSION
Prepare
about 3kg
of your soil.
And pass it
through No.
4 sieve.
Step 1
Place the soil
in the mixer
and gradually
add water to
reach the
desired
moisture
content (w)
Step 2
Weigh the proctor
mould without base
plate and collar. Fix
the collar and base
plate. Place the soil in
the Proctor mould and
compact it in 3 layers
giving 25 blows per
layer with the 2.5 kg
rammer falling
through.
Step 3
Then we
remove the
collar; trim the
compacted soil
even with the
top of mould
using a straight
edge and
weigh.
Step 4
Extrude the soil
from the mould
using a metallic
extruder, making
sure that the
extruder and the
mould are in-
line.
Step 5
Measure the
water
content from
the top,
middle and
bottom of
the sample.
Step 6
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▪ Because of the difference between lab and
field compaction methods, the maximum dry
density in the field may reach 90% to 95%
APPARATUS
RECOMMENDATION
✓ Take water content of the soil after each
compaction.
✓ Repeat the steps until the moist density of
the soil decrease.
✓ The blows should be uniformly distributed
over the surface of each layer.
▪ Is the compaction of soil layer to a specified
standard by means of compaction equipment
COMPUTATIONS
✓ The compaction water content (w) of the
soil sample is calculated using the average of
the three measurements obtained (top,
middle and bottom part of the soil mass).
✓ The dry unit weight is calculated as;
W = the weight of the mould and the
soil mass (kg) Wm = the weight of
the mould (kg)
w = the water content of the soil (%)
V = the volume of the mould (m3)
Compaction of soil is
an important process
which helps in
achieving various
physical properties
required for proper
soil behaviour under
loading.
PROCEDURES
Reference: Hajong, A. (2017). Laboratory Soil
Compaction Test. India: www.slideshare.net.
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