AMIT Soil Mechanics Laboratory

AMIT Soil Mechanics Laboratory

1 - Giving Practical skill traning for UG and PG students
2 - Cummunity Service
3 - Consoultan

17/01/2022

Total soil sample size required for CBR is 5kg.

Photos from AMIT Soil Mechanics Laboratory's post 12/10/2020

Atterberg limit and Sieve Analysis Test Equipments

12/10/2020

Specific gravity equipments

26/04/2020

COMPACTION TEST
These test methods cover laboratory compaction methods used to determine the relationship between molding water content and dry unit weight of soils.
These test methods apply only to soils (materials) that have 30 % or less by mass of their particles retained on the 3⁄4-in. (19.0-mm) sieve and has not been previously compacted in the laboratory; that is, do not reuse compacted soil
Three alternative methods are provided. The method used shall be as indicated in the specification for the material being tested. If no method is specified, the choice should be
based on the material gradation.
Method A:
Mold - 4-in. (101.6-mm) diameter.
Material - Passing No. 4 (4.75-mm) sieve.
Layers - Five.
Blows per layer - 25.
Usage—May be used if 25 % or less by mass of the material is retained on the No. 4 (4.75-mm) sieve. However, if 5 to 25 % by mass of the material is retained on the No. 4 (4.75-mm) sieve, Method A can be used but oversize corrections will be required and there are no advantages to using Method A in this case.
Other Use - If this graduation requirement cannot be met, then Methods B or C may be used
Method B:
Mold - 4-in. (101.6-mm) diameter.
Material - Passing 3⁄8-in. (9.5-mm) sieve.
Layers - Five.
Blows per layer - 25.
Usage - May be used if 25 % or less by mass of the material is retained on the 3⁄8-in. (9.5-mm) sieve. However, if 5 to 25 % of the material is retained on the 3⁄8-in. (9.5-mm) sieve, Method B can be used but oversize corrections will be required (See 1.4). In this case, the only advantages to using Method B rather than Method C are that a smaller amount of sample is needed and the smaller mold is easier to use.
Other Usage - If this graduation requirement cannot
be met, then Method C may be used.
Method C:
Mold - 6-in. (152.4-mm) diameter.
Material - Passing 3⁄4-in. (19.0-mm) sieve.
Layers - Five.
Blows per layer - 56.
Usage - May be used if 30 % or less (see 1.4) by mass of the material is retained on the 3⁄4-in. (19.0-mm) sieve .The 6-in. (152.4-mm) diameter mold shall not be used with Method A or B.


20/03/2020

በአርባ ምንጭ ዩቨርስቲ ስቨል ምህንድስና ት/ት ክፍል SOIL MECHANICS ላቦራቶሪ ዉስጥ የሚሰጡ የLABORATORY እና FIELD ተሰቶች የሚከተሉት ናቸዉ፡፡
1- INDEX PROPERTIES
1.1 – NATURAL MOISTURE CONTENT
1.2 – SPECIFIC GRAVITY
1.3 – SIEVE ANALYSIS
1.4 – HYDROMETRY
1. 5 – ATTERBERG LIMIT and SHRINKAGE LIMIT
1.6 – COMPACTION
1. 7 – FREE SWEEL
2- ENGINEERING PROPERTIES
2.1 – TRIXIAL
2.2 – UNCONFINED COMPRESSION
2.3 – DIRECT SHEAR
2.4 – CONSOLODATION
2.5 – PERMEABILITY
2.6 – CBR
2.7 – VANE SHEAR
3 - FIELD TESTS
3.1 – FIELD DENSITY
3.2 – IN SITU BEARING CAPACITY
3.3 – PENETROMETER

20/08/2019

Swelling % = Change in Length/ Height of Sample*100

04/06/2019

Soil Classification
1 - Coarse grained
1.1 Gravel fraction
1.2 Sand fraction
2 - Fine grained
2.1 Silt
2.2 Clay

26/05/2019

DETERMINATION OF NATURAL
MOISTURE CONTENT
OBJECTIVE
To Determine the natural moisture content of the
given soil sample.
NEED AND SCOPE OF THE EXPERIMENT
In almost all soil tests natural moisture
content of the soil is to be determined.
The knowledge of the natural moisture
content is essential in all studies of soil
mechanics.
To sight a few, natural moisture content is used in determining:-
1 - The bearing capacity and settlement.
DEFINITION
Amount of water present in the soil sample.
The natural water content also called
the natural moisture content is the ratio
of the weight of water to the weight of
the solids in a given mass of soil. This
ratio is usually expressed as percentage.
W = (Mass of Water)/(Mass of Solid)*100%
= (M2 - M3)/(M3 - M1)*100%
Where M1 = mass of can
M2 = mass of can + wet soil
M3 = mass of can + dry soil
APPARATUS REQUIRED
1. Moisture can.
2. Electric oven, maintain the
T° b/n105°C to 110° C.
3. Desiccator.
4. Balance of sufficient sensitivity.
PROCEDURE
1. Clean the container with lid dry it and
weigh it (M1).
2. Take a specimen of the sample in the
container and weigh with lid (M2).
3. Keep the container in the oven with
lid removed. Dry the specimen to
constant weight maintaining the
temperature between 105° C to 110° C
for a period varying with the type of soil
but usually 18 to 24 hours.
4. Record the final constant weight (M3)
of the container with dried soil sample.

Photos from AMIT Soil Mechanics Laboratory's post 24/04/2019

1 - one dimensional consolidation cells
2 - CBR mold and their cells
3 - Gassgrande Atterberg limit apparatus

23/04/2019

LABORATORY EXPERIMENTS
1 - Natural Moisture Content
*By ovendried method
2 - Spec

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