9.7. Thermal Properties of Concrete

Try these first

1. 1.

   What is the typical range of thermal conductivity for concrete?

   Hint

   Consider what makes materials good for thermal mass.

2. 2.

   Define heat of hydration.

   Hint

   Think about the chemical reactions occurring when cement mixes with water.

3. 3.

   What is the typical thermal conductivity range for concrete?

   • 0.1 – 0.5 W/m·K
   • 0.7 – 1.4 W/m·K
   • 1.5 – 2.0 W/m·K

   Hint

   Remember the efficiency of concrete as thermal mass.

4. 4.

   True or False: Thermal expansion coefficients of concrete are irrelevant in structural design.

   • True
   • False

   Hint

   Think about the interactions of materials with temperature changes.

5. 5.

   Given that two concrete mixtures have different thermal conductivities but are used in the same climate, analyze how each mixture will perform in energy conservation over time.

   Hint

   Think about which mixture will maintain temperature consistency better.

6. 6.

   Assess the potential effects of neglecting to manage heat of hydration in a large retaining wall.

   Hint

   Consider the worst-case scenario if heat is uncontrolled.