In structural applications, what is a potential drawback of using High Performance Concrete?
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A.
Lower bond strength with reinforcement
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B.
Difficulty in achieving proper compaction due to high stiffness
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C.
Increased susceptibility to chemical reactions in marine environments
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D.
Lower strength compared to conventional concrete
Correct Answer:
B. Difficulty in achieving proper compaction due to high stiffness
Explanation:
The correct answer is Difficulty in achieving proper compaction due to high stiffness.
High Performance Concrete (HPC) is designed for superior strength and durability; however, its specific composition often results in a very stiff consistency. This high viscosity and low workability can make it challenging to compact properly using standard methods. If not adequately compacted, air pockets or voids may remain, which can compromise the structural integrity and long-term performance of the material. Consequently, ensuring uniform density requires more intensive vibration or specialized placement techniques compared to traditional concrete.
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