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Question
Consider the following statements:
1. The viscosity-modifying agents allow the concrete to remain cohesive even with a high degree of fluidity.
2. Self-consolidating concrete can be used for beam-column joints in earthquake resistant structures.
3. Self-consolidating concrete is not recommended for precast prestrsessed concrete.
Which of the above statements are correct?
A.
2 and 3 only
B.
1 and 2 only
C.
1 and 3 only
D.
1, 2 and 3
Answer ( Option B)

1 and 2 only

Solution

Self compacting concrete remains cohesive with high degree of fluidity.
Hence, statement (1) is correct.
As beam column joints will have heavy reinforcement in earthquake resistant structure, self consolidating concrete can be used to minimise the voids in concrete.
Hence statement (2) is correct.
Self consolidating concrete can be also used for precast prestressing concrete.
Hence, statement (3) is incorrect.

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