6.3. Surface Crack Inspection

Try these first

1. 1.

   What are plastic shrinkage cracks?

   Hint

   Think about conditions that lead to quick drying.

2. 2.

   What tools can be used to measure crack widths?

   Hint

   Consider devices used to assess changes in materials.

3. 3.

   What primarily causes plastic shrinkage cracks?

   • A. Freezing temperatures
   • B. Rapid evaporation of moisture
   • C. Excessive humidity

   Hint

   Think about the effects of high temperatures on water.

4. 4.

   True or False: Thermal cracking can occur in warm weather.

   • True
   • False

   Hint

   Consider the naming of the crack type.

5. 5.

   A construction team notices several plastic shrinkage cracks shortly after pouring concrete on a hot summer day. Suggest a method for inspecting these cracks effectively.

   Hint

   Focus on when to inspect after concrete placement.

6. 6.

   During a winter construction project, thermal cracking was observed in previously poured concrete. Discuss methods to mitigate the causes of this cracking in the future.

   Hint

   Think about temperature management techniques.