8.3. Temperature Sensitivity

Try these first

1. 1.

   Define temperature sensitivity in high performance concrete.

   Hint

   Think about how temperature affects hydration.

2. 2.

   What is thermal cracking?

   Hint

   Consider the relationship between temperature and concrete structures.

3. 3.

   What is the primary cause of thermal cracking in high performance concrete?

   • Low water-cement ratio
   • Rapid hydration
   • Excessive humidity

   Hint

   Think about the effects of fast curing.

4. 4.

   True or False: Temperature sensitivity has no significant effect on the longevity of high performance concrete.

   • True
   • False

   Hint

   Consider the long-term implications of temperature control.

5. 5.

   Calculate the effect of a 10°C increase in temperature on the hydration reaction of high performance concrete and the resulting thermal stress. Discuss the impact on potential crack formation.

   Hint

   Consider the thermal expansion properties and the hydration heat generation.

6. 6.

   Design an experimental setup to study the effects of various curing temperatures on the compressive strength of HPC over time.

   Hint

   What controls will you implement to ensure consistent testing?