BASIC SOIL TEST ON SUB-GRADE SOIL MATERIAL & FLEXIBLE PAVEMENT DESIGN ON ROAD LINKING – UGWUAJI AND CAMPUS M, IMT; ENUGU, ENUGU STATE
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BASIC SOIL TEST ON SUB-GRADE SOIL
MATERIAL & FLEXIBLE PAVEMENT
DESIGN
ON ROAD LINKING – UGWUAJI AND CAMPUS M, IMT; ENUGU, ENUGU STATE
ABSTRACT
This case study is an
existing pathway or fort path linking Ugwuji and Campus 111 (IMT) for a
proposed road construction by the government of Enugu State.
This project encloses
the following
-
The condition of the existing sub-grade
and its suitability for use as a good sub-grade soil material by processes of
different lab test.
-
Using the group index method and CBR
method to design a flexible pavement on the pathway under consideration.
-
The optimum moisture content (OMC) and
the maximum Dry Density (MDD) which are obtained by various laboratory test
with a view of applying corresponding values in the field.
TABLE
OF CONTENTS
CHAPTER
ONE
1.0
Collection of Sample and Laboratory
Testing Program
CHAPTER
TWO
2.0
Mechanical Analysis
CHAPTER
THREE
3.0
Compacting Test
CHAPTER
FOUR
4.0
Atterberg Limit Test
4.1
Liquid Limit
4.2
Plastic Limit
CHAPTER
FIVE
5.0
Califorms Bearing Ration (CBR) Test
CHAPTER
SIX
1.0
Analysis Conclusion and Recommendation
6.1
Flexible Pavement Design
6.2
Bibliography
CHAPTER
ONE
COLLECTION OF SAMPLES
AND LABORATORY TESTING PROGRAM
The test carried out
in this project was on distributed soil sample.
This implies
collecting soil samples that are disfigured their natural shape.
Soil samples were collected on three (3) trial pit along Ugwuaji and Campus 111
IMT Enugu. A total of three (3) samples were collected from the trial pits (one
from each pit) using pick are and spade. The samples were taken at 1.0m depth
in each pit. The samples were put in polythene bags and labelled A, B, C. The
samples were spread on the floor of the soil laboratory and stones removed for
seven (7) days to allow for air drying.
The laboratory testing program comprises mechanical analysis, compaction test
and atterberg limit tests, and the California bearing ratio (CBR) test.
The objectives of the laboratory testing program were
1.
To obtain a general information
regarding the nature of the soil and their variation with depth throughout the
length of the road under consideration.
2.
To obtain information regarding the
strength characteristics of the soil.
3.
To obtain information which will enable
engineers to group soils according to their appearances of the purposes of
complying different soils.
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