3. Effects on Concrete Structures

Try these first

1. 1.

   What is creep in concrete?

   Hint

   Think of how materials can change under constant pressure.

2. 2.

   What can cause cracking in concrete due to shrinkage?

   Hint

   Consider how concrete changes as it dries.

3. 3.

   What is creep in concrete?

   • A short-term deformation
   • A gradual increase in strain
   • A type of crack

   Hint

   Remember what happens to concrete when a constant load is applied over a long period.

4. 4.

   True or False: Shrinkage does not affect the structural integrity of concrete.

   • True
   • False

   Hint

   Think about the consequences of material changes over time.

5. 5.

   Consider a newly erected 20-meter beam. If excessive creep causes a projected deflection exceeding 35mm by the end of its service life, what actions should a civil engineer propose to mitigate this risk?

   Hint

   Think about both material properties and structural design.

6. 6.

   Evaluate how the use of supplementary cementitious materials might influence shrinkage rates in a large concrete pour and its consequent cracking patterns.

   Hint

   Consider the properties of the materials used.