CMT MODULE 6 - BATCHING,
MIXING, PLACING AND
COMPACTION OF CONCRETE
Comprehensive Questions
(Frequently Tested) with
Verified Answers Graded A+
Concrete - Answer: - It is a vital material and plays a major role in the quality of buildings or
structures. One may say that the making of ________ is easy but it's not enough.
Concrete - Answer: It is important that a _____ mix is correctly designed, batched, mixed and
transported, but it is also important to place concrete correctly.
Concrete - Answer: The placing of _____ is an essential operation because it largely determines
the success of a structure and its durability. Hence _____ placement must be done in systematic
and efficient way to give the best results desired.
Proper mixing - Answer: _____________ of concrete ingredients is of utmost importance in
order to produce good quality of fresh concrete. During the process of mixing the surface of all
the aggregate particles is coated with cement paste.
, segregation and bleeding - Answer: Well mixed concrete is required for the desired workability
and performance of concrete in both the fresh as well as the hardened state. If the concrete is
not well mixed, then it tends to ____________ and ___________
1. Concrete should be of uniform colour.
2. All concrete materials like cement, fine aggregates, coarse aggregates and water should be
homogeneously mixed.
3. Cement paste should cover all the surface of the aggregate.
4. Segregation or bleeding of concrete should not occur after the concrete mixing. - Answer: 4
CHARACTERISTICS OF WELL MIXED CONCRETE
Segregation - Answer: __________ of concrete is defined as the separation of constituent
materials of concrete
1. Inappropriate mixing of concrete with greater water content.
2. Poorly proportional mixing where sufficient matrix is not available for binding aggregates.
3. Dropping concrete from a height as in concrete for columns.
4. Badly designed mixer or worm-out blades.
5. Excessive vibration of concrete.
6. Transportation of concrete over long distances - Answer: SEGREGATION OF CONCRETE
CAUSES (6)
1. Ensure that the concrete is mixed properly; the concrete must mixed at the correct speed in
the transit mixer for at least two minutes immediately before discharging.
2. Concrete should be laid as soon as possible.
3. While transporting the mixture, load carefully.
4. Always add new concrete to the concrete face already.
5. Limiting the height from where the concrete has fallen.
MIXING, PLACING AND
COMPACTION OF CONCRETE
Comprehensive Questions
(Frequently Tested) with
Verified Answers Graded A+
Concrete - Answer: - It is a vital material and plays a major role in the quality of buildings or
structures. One may say that the making of ________ is easy but it's not enough.
Concrete - Answer: It is important that a _____ mix is correctly designed, batched, mixed and
transported, but it is also important to place concrete correctly.
Concrete - Answer: The placing of _____ is an essential operation because it largely determines
the success of a structure and its durability. Hence _____ placement must be done in systematic
and efficient way to give the best results desired.
Proper mixing - Answer: _____________ of concrete ingredients is of utmost importance in
order to produce good quality of fresh concrete. During the process of mixing the surface of all
the aggregate particles is coated with cement paste.
, segregation and bleeding - Answer: Well mixed concrete is required for the desired workability
and performance of concrete in both the fresh as well as the hardened state. If the concrete is
not well mixed, then it tends to ____________ and ___________
1. Concrete should be of uniform colour.
2. All concrete materials like cement, fine aggregates, coarse aggregates and water should be
homogeneously mixed.
3. Cement paste should cover all the surface of the aggregate.
4. Segregation or bleeding of concrete should not occur after the concrete mixing. - Answer: 4
CHARACTERISTICS OF WELL MIXED CONCRETE
Segregation - Answer: __________ of concrete is defined as the separation of constituent
materials of concrete
1. Inappropriate mixing of concrete with greater water content.
2. Poorly proportional mixing where sufficient matrix is not available for binding aggregates.
3. Dropping concrete from a height as in concrete for columns.
4. Badly designed mixer or worm-out blades.
5. Excessive vibration of concrete.
6. Transportation of concrete over long distances - Answer: SEGREGATION OF CONCRETE
CAUSES (6)
1. Ensure that the concrete is mixed properly; the concrete must mixed at the correct speed in
the transit mixer for at least two minutes immediately before discharging.
2. Concrete should be laid as soon as possible.
3. While transporting the mixture, load carefully.
4. Always add new concrete to the concrete face already.
5. Limiting the height from where the concrete has fallen.
