République Algérienne Démocratique et Populaire Ministère de l’Enseignement Supérieur et de la
Recherche Scientifique.
Université chikh Laarbi Tebessi -Tebessa
Department of Mining and Geotechnology
Proctor test
Prepared by:Makhlouf Ouiam
Level: 3L
Option:Geotech
Under supervision:doctor Yacine Berrah
Academic year:2023/2024
Introduction:
A proctor test is a test used to determine the properties of a soil,
particularly its maximum density and optimum moisture content for
compaction. The proctor test involves compressing a soil sample to
different moisture contents, followed by measuring the resulting
density. This helps determine the amount of water needed to achieve
maximum soil density, which is essential for the design and
construction of roadways, dams, embankments and other structures.
Objective:
The objective of the proctor test is to determine the ideal compaction
characteristics of a soil, particularly its maximum density and
optimum moisture content. This helps determine the amount of water
needed to achieve maximum soil density upon compaction, which is
essential to ensure well-structured and stable soils for the construction
of roads, dams, airstrips and other structures. Other infrastructure.
The proctor test helps engineers select appropriate compaction
methods and ensure that soil is adequately compacted to meet design
and durability requirements.
Equipment
-soil sample
-humer
-Proctor mold
-spatula
Experiment
1. Proctor normal
In the standard Proctor test, the soil is compacted within a mold of
944 cm³ volume and a diameter of 101.6 mm. This mold is affixed to
a
baseplate at the bottom and an extension at the top during the
laboratory procedure. The soil, mixed with varying water content
(e.g., w=14, w=18, w=22), undergoes compaction in three uniform
layers, each receiving 25 blows from a hammer. This hammer weighs
2.5 kg and drops from a height of 305 mm. The resulting moist unit
weight of compaction is then determined
2. Proctor modified
The modified Proctor test, the same mold with a volume of 944 cm3
is utilized, consistent with the standard Proctor test. However, the
compaction process involves five layers compacted by a hammer
weighing 4.54 kg, dropped from a height of 457 mm. Each layer
receives 25 blows from the hammer, mirroring the standard Proctor
test procedure. We repeat the experiment for moisture contents of
14%, 18%, and 22%.
Calculation
M1=1500g
Ɣt=m*g/v=1500*9.81/944=15.58 (kn
/m3)
Ɣd=Ɣt/(1+W)
M W ƔT Ɣd
1500 14 15.58 13.66
2000 18 20.78 17.61
1800 22 18.70 15.32
table of calculation normal proctor
M1:2000g
M W ƔT Ɣd
2000 14 20.78 18.22
2100 18 21.82 18.49
2020 22 20.99 17.20
table of calculation modified proctor
Graphique of dry unite weight of water content
Conclusion
The conclusion of a proctor test is usually based on the data collected
during the test, including the maximum density of the soil and the
optimum moisture content for its compaction. Based on these results,
engineers and construction professionals can determine appropriate
recommendations for soil compaction to ensure its stability and
durability. The test conclusion may also include recommendations
regarding which compaction methods to use, the amount of water
needed to achieve maximum soil density, and other important
considerations for infrastructure construction.
