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WorksheetsMIDTERM EXAM CMT
Total questions: 32
Worksheet time: 26mins
What is concrete mix design?
A mixture of cement and water
A mixture of gravel and water
A mixture of sand and water
A mixture of cement, water, and aggregates
What is the main material that accounts for most of the concrete raw material cost?
Cement
Water
Gravel
Sand
It refers to any materials that will bind two or more non-adhesive substances together.
Paste
Gravel
Sand
Cement
What is the purpose of chemical admixture in concrete mix design?
To add color to the concrete
To improve workability and durability
To reduce the cost of the concrete
To increase the weight of the concrete
What is the composition of Class 'A' concrete mix?
1 part cement, 1.5 parts sand, 3 parts gravel
1 part cement, 2.5 parts sand, 5 parts gravel
1 part cement, 3 parts sand, 6 parts gravel
1 part cement, 2 parts sand, 4 parts gravel
What is the role of concrete mix design?
To make the concrete transparent
To make the concrete colorful
To make the concrete heavy
To come up with the most economical concrete mixture
How are materials in concrete mix usually combined?
By blending them
By freezing them
By weighing and combining
By heating them
It determines the freshness of cement and the moisture content accumulated and present in the cement cause by free hydration and carbonation of cement.
Insoluble Residue
SULFUR TRIOXIDE
Loss on Ignition
MAGNESIUM OXIDE
To determine the inert materials present in cement.
Insoluble Residue
SULFUR TRIOXIDE
Loss on Ignition
MAGNESIUM OXIDE
It affects the strength and setting time of cement.
Insoluble Residue
SULFUR TRIOXIDE
Loss on Ignition
MAGNESIUM OXIDE
It causes unsoundness (volume change) on cement.
Insoluble Residue
SULFUR TRIOXIDE
Loss on Ignition
MAGNESIUM OXIDE
What is the typical distribution of raw materials by volume for a normal strength concrete?
12% cement, 33% sand, 38% gravel, 17% water
25% cement, 25% sand, 25% gravel, 25% water
7% cement, 68% sand, 7% gravel, 18% water
40% cement, 30% sand, 20% gravel, 10% water
Includes blust furnace slug shale clay and light weight aggregate
Manufactured aggregate
Natural aggregate
Recycled aggregate
Marine-Dredged Aggregate
Taken from natural deposits without change in their nature during production.
Manufactured aggregate
Natural aggregate
Recycled aggregate
Marine-Dredged Aggregate
Obtained by deposition of weathered & transported preexisting rocks or solutions.
Igneous rocks
Sedimentary rocks
Metamorphic rocks
Marine-Dredged Rocks
Formed under high heat & pressure alteration of either igneous & sedimentary rocks
Igneous rocks
Sedimentary rocks
Metamorphic rocks
Marine-Dredged Rocks
Concrete Aggregates having a value of Specific Gravity > 2.8
Heavy weight
Normal Weight
Light weight
Structurally Light weight
Concrete Aggregates having a value of Specific Gravity between 2.4 to 2.8
Heavy weight
Normal Weight
Light weight
Structurally Light weight
Concrete Aggregates having a value of Specific Gravity less than 2.4
Heavy weight
Normal Weight
Light weight
Structurally Light weight
Concrete having a unit weight of 1350 to 1850 kg/m3.
Heavy weight
Normal Weight
Light weight
Structurally Light weight
(a) is the characteristic generally used for calculation of the volume occupied by the aggregate in various mixtures containing aggregate including portland cement concrete, bituminous concrete, and other mixtures that are proportioned or analyzed on an absolute volume basis.
(a) are used to calculate the change in the weight of an aggregate due to water absorbed in the pore spaces within the constituent particles,
It is the determination of the relative amounts of materials required to produce a concrete that will be economical and workable in the plastic state and that will have the required properties in the hardened state.
(a)
(a) is burning the materials to make it liquid by heating it to a very high temperature, at about 1480 deg C.
Portland Cement is a hydraulic cement, that is, it reacts or combined chemically with water(hydrates), one that will harden under water. The process is known as (a) .
The heat produced by the chemical reaction between cement and water.
(a)
This is a standard portland cement used for general construction work when the special properties of the other types are not required.
(a)
Its slow setting time is an advantage in large structures, where solid one-piece construction is desire..
(a)
The most common artificial pozzolan, obtained by electrostatic or mechanical means form the flue gases of furnace in coal-fired power stations.
(a)
The test method is intended to be used to determine the amount of water to prepare hydraulic cement pastes for testing.
(a)
Explain the step by step procedure (5 steps) in conducting slump test for a freshly mixed concrete.
Explain the step by step procedure (6 steps) in preparing cylindrical samples for compressive strength test.
