09 Reinforced Concrete Structures

Which of the following is NOT a component of concrete?

• Water

• Cement

• Sand

• Clay

How many days will a concrete reach its maximum compressive strength?

• 7 days

• 14 days

• 21 days

• 28 days

Which of the following is a major component of cement?

• Clinker

• Sand

• Gravel

• Water

What type of cement is being used in drainage structures, large piers, retaining walls, or any concrete that has a contact with ground or buried in the ground?

In layman term, it was called "GENERAL PURPOSE CEMENT".

• Type V

• Type I/Type I-A

• Type II

• Type III

Which of the following sieve number will not allow coarse aggregates to pass through?

• No. 4 (4.75 mm)

• No. 2 (50 mm)

• No. 1 (25.4 mm)

What type of deterioration occurs when the binder from the concrete surface was dissolved?

• Sulphate Attack

• Acid Attack

• Soft Water Attack

• Alkali-Aggregate Reaction

What type of reinforced concrete deterioration is being shown in the figure?

• Blistering

• Crazing

• Frost Attack

• Efflorescence

Flexural strength test is one of the important tests for the design and construction of railway concrete structures, roads, and even airport pavements. What is its equivalent testing standard?

• ASTM C39

• ASTM C78

• ASTM C76

• ASTM C37

Which of the following images shows blistering?

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What type of physical attack starts when the protection provided by the concrete cover was loss?

• Chemical attack

• Reinforcement corrosion

• Cracking

• Crazing