CIVIL ENGINEERING LABORATORY
CC203 – CONCRETE TECHNOLOGY
CIVIL ENGINEERING DEPARTMENT
POLYTECHNIC OF PORT DICKSON
CLASS:
CONCRETE LAB.
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EXPERIMENT DATE (1) :………………………………………
EXPERIMENT DATE (2) :………………………………………
EXPERIMENT DATE (3) :………………………………………
GROUP NO:
LECTURER’S NAME:
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CUBE TEST
LECTURER’S REVIEW:
GROUP MEMBERS’ NAME/REG.N0:
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1………………………………………………………..
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2………………………………………………………..
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3………………………………………………………..
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4………………………………………………………..
MARKS:
SUBMISSION DATE:
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[1]
CONCRETE LABORATORY
PREPARED BY NORLEEZA BT MUHAMMAD
CIVIL ENGINEERING DEPARTMENT
POLITEKNIK PORT DICKSON
EXPERIMENT NO.
:
TITLE
:
CUBE TEST
OBJECTIVE
:
To determine the strength and workability of concrete mixture
THEORY
:
To determine the concrete fulfils the required specification, 2 types
of testing to be conducted are Wet Concrete Testing such as slump, compacting factor and Vebe
Consistency while hard concrete testing such as cube test and beam flexural strength. Hard concrete
test were conducted at the age of 3, 7, 14, 21 and 28 days after curing. The concrete strength
increases according to the age and the strength increment will continue for sometimes.
Nevertheless, for most of the work, the concrete strength on the 28 days is set as standard even
though it might be determined at a much earlier or longer period. The increment rate of the
concrete strength will depend on the temperature and moisture during hardening process.
TOOLS AND EQUIPMENT
1. Compression Machine
2. Standard Cube size 150mm x
150mm (6” x 6” x 6”)
4. Grease
3. Hand Float
5. Steel Rod size (25mm x
25mm)
[2]
WORKING METHOD
1. The mould that will be used in the cube test must be cleaned internally using the wire brush.
1 .The interior surfaces of the assembled mould is required to be thinly coated with grease oil to
prevent adhesion of concrete.
2. Pour the ready mixed concrete with certain mix proportion into the mould in 3 layers and each
layer must be tamping 25 times using the compacting steel rod .Fill up the mould until overflow and
levelled the surface using the hand float.
3. The concrete will be left for 24 hours setting.
4. The above steps shall be repeated for another 2 more cubes with different mix proportion.
5. Record the date of the mixture for every cube and submerged all the 3 cube in the curing tank at
the temperature of 18 degree Celsius – 20 degree Celsius and test on the 7,14 and 28 days.
6. Before placing in the water, the cube must be weighted while it is dry and record as M2.
7. When the cube is fully matured it shall be weighted again and record as M2kg.
8. Place the cube to be tested at the center plate of the compression machine. Ensure both plates
are in contact with the lower surface of the concrete plate. Release the load valve to raise up the
bottom plate until the cube touch the above plate. Record the maximum load that will crush the
tested cube.
9. Repeat the above step using the other cubes. Record the result accordingly.
RESULT
CUBE NO.
DATE OF
CUBE MADE
DATE OF
TESTING
AGE DURING
TESTING
1
2
3
Average
[3]
CUBE WEIGHT
(kg)
COMPRESSION
STRENGTH
(MPa)@KN
Calculation
Calculate the value of standard deviation
whereas,
S
=
(X1 – X2)
√N–1
X1
=
Average of Compression Strength
X2
=
Actual Cube Compression Strength (Compression strength value for
each cube)
N
=
Total
QUESTION
1. Why the inner surface of the mould shall be coated with the grease oil?
2. How can the value of standard deviation describe the strength and quality of the concrete?
DISCUSSION
CONCLUSION
[4]