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Workability of concrete can be measured using slump, compaction factor and Vee-bee time. Consider the following statements for workability of concrete:
(i) As the slump increases, the Vee-bee time increases.
(ii) As the slump increases, the compaction factor increases.
Which of the following is TRUE?
- a)Both (i) and (ii) are True
- b)Both (i) and (ii) are False
- c)(i) is True and (ii) is False
- d)(i) is False and (ii) is True
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Workability of concrete can be measured using slump, compaction factor...
As slump increases, Vee bee time decreases, as it becomes easier for concrete to flow.
It is clear from the below figure that as the slump increases, the compaction factor also increases.
Most Upvoted Answer
Workability of concrete can be measured using slump, compaction factor...
Workability of concrete refers to its ability to be easily mixed, placed, and compacted without segregation or excessive bleeding. It is an important property to consider in concrete construction as it affects the ease of construction and the quality of the final product. Several tests can be performed to measure the workability of concrete, including slump, compaction factor, and Vee-bee time.
Slump test:
The slump test measures the consistency or flowability of concrete. It involves filling a slump cone with freshly mixed concrete and then removing the cone to measure the slump, which is the difference in height between the original height of the concrete and the height after the cone is removed. A higher slump indicates higher workability, meaning the concrete is more fluid and easier to handle.
Compaction factor test:
The compaction factor test is another method to assess the workability of concrete. It measures the degree of compaction achieved by a standard amount of work, usually measured by the weight of compacted concrete compared to the weight of the same concrete in an uncompacted state. A higher compaction factor indicates better workability, as it means more concrete can be compacted into a given space.
Vee-bee test:
The Vee-bee test measures the time taken for a standard quantity of concrete to pass through a standard conical-shaped container. It provides an indication of the internal friction and cohesion of the concrete mix. A longer Vee-bee time indicates lower workability, as it means the concrete requires more time to flow through the container.
Based on the statements provided:
(i) As the slump increases, the Vee-bee time increases.
This statement is false. An increase in slump indicates higher workability and fluidity of the concrete. As a result, the concrete will flow more easily through the Vee-bee container, reducing the Vee-bee time.
(ii) As the slump increases, the compaction factor increases.
This statement is true. A higher slump indicates higher workability and fluidity, which allows for better compaction of the concrete. Consequently, the concrete will have a higher compaction factor, indicating better workability.
Therefore, the correct answer is option (d) (i) is False and (ii) is True.
Slump test:
The slump test measures the consistency or flowability of concrete. It involves filling a slump cone with freshly mixed concrete and then removing the cone to measure the slump, which is the difference in height between the original height of the concrete and the height after the cone is removed. A higher slump indicates higher workability, meaning the concrete is more fluid and easier to handle.
Compaction factor test:
The compaction factor test is another method to assess the workability of concrete. It measures the degree of compaction achieved by a standard amount of work, usually measured by the weight of compacted concrete compared to the weight of the same concrete in an uncompacted state. A higher compaction factor indicates better workability, as it means more concrete can be compacted into a given space.
Vee-bee test:
The Vee-bee test measures the time taken for a standard quantity of concrete to pass through a standard conical-shaped container. It provides an indication of the internal friction and cohesion of the concrete mix. A longer Vee-bee time indicates lower workability, as it means the concrete requires more time to flow through the container.
Based on the statements provided:
(i) As the slump increases, the Vee-bee time increases.
This statement is false. An increase in slump indicates higher workability and fluidity of the concrete. As a result, the concrete will flow more easily through the Vee-bee container, reducing the Vee-bee time.
(ii) As the slump increases, the compaction factor increases.
This statement is true. A higher slump indicates higher workability and fluidity, which allows for better compaction of the concrete. Consequently, the concrete will have a higher compaction factor, indicating better workability.
Therefore, the correct answer is option (d) (i) is False and (ii) is True.
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Workability of concrete can be measured using slump, compaction factor and Vee-bee time. Consider the following statements for workability of concrete:(i) As the slump increases, the Vee-bee time increases.(ii) As the slump increases, the compaction factor increases.Which of the following is TRUE?a)Both (i) and (ii) are Trueb)Both (i) and (ii) are Falsec)(i) is True and (ii) is Falsed)(i) is False and (ii) is TrueCorrect answer is option 'D'. Can you explain this answer?
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Workability of concrete can be measured using slump, compaction factor and Vee-bee time. Consider the following statements for workability of concrete:(i) As the slump increases, the Vee-bee time increases.(ii) As the slump increases, the compaction factor increases.Which of the following is TRUE?a)Both (i) and (ii) are Trueb)Both (i) and (ii) are Falsec)(i) is True and (ii) is Falsed)(i) is False and (ii) is TrueCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Workability of concrete can be measured using slump, compaction factor and Vee-bee time. Consider the following statements for workability of concrete:(i) As the slump increases, the Vee-bee time increases.(ii) As the slump increases, the compaction factor increases.Which of the following is TRUE?a)Both (i) and (ii) are Trueb)Both (i) and (ii) are Falsec)(i) is True and (ii) is Falsed)(i) is False and (ii) is TrueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Workability of concrete can be measured using slump, compaction factor and Vee-bee time. Consider the following statements for workability of concrete:(i) As the slump increases, the Vee-bee time increases.(ii) As the slump increases, the compaction factor increases.Which of the following is TRUE?a)Both (i) and (ii) are Trueb)Both (i) and (ii) are Falsec)(i) is True and (ii) is Falsed)(i) is False and (ii) is TrueCorrect answer is option 'D'. Can you explain this answer?.
Workability of concrete can be measured using slump, compaction factor and Vee-bee time. Consider the following statements for workability of concrete:(i) As the slump increases, the Vee-bee time increases.(ii) As the slump increases, the compaction factor increases.Which of the following is TRUE?a)Both (i) and (ii) are Trueb)Both (i) and (ii) are Falsec)(i) is True and (ii) is Falsed)(i) is False and (ii) is TrueCorrect answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Workability of concrete can be measured using slump, compaction factor and Vee-bee time. Consider the following statements for workability of concrete:(i) As the slump increases, the Vee-bee time increases.(ii) As the slump increases, the compaction factor increases.Which of the following is TRUE?a)Both (i) and (ii) are Trueb)Both (i) and (ii) are Falsec)(i) is True and (ii) is Falsed)(i) is False and (ii) is TrueCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Workability of concrete can be measured using slump, compaction factor and Vee-bee time. Consider the following statements for workability of concrete:(i) As the slump increases, the Vee-bee time increases.(ii) As the slump increases, the compaction factor increases.Which of the following is TRUE?a)Both (i) and (ii) are Trueb)Both (i) and (ii) are Falsec)(i) is True and (ii) is Falsed)(i) is False and (ii) is TrueCorrect answer is option 'D'. Can you explain this answer?.
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