18.2.9. Ambient Temperature and Weather

Try these first

1. 1.

   What should you add to the concrete mix in hot weather?

   Hint

   Think about how heat affects liquids.

2. 2.

   What risks does freezing pose to concrete?

   Hint

   Consider what happens to water when it freezes.

3. 3.

   What effect does hot weather have on concrete curing?

   • Slows curing
   • Speeds up curing
   • No effect

   Hint

   Think about how heat affects drying.

4. 4.

   True or False: Accelerators are used to delay the setting time of concrete.

   • True
   • False

   Hint

   Consider what you are trying to accomplish with an accelerator.

5. 5.

   How would you design a strategy for pouring concrete in an environment where temperatures frequently fluctuate between hot and cold?

   Hint

   Think about having both sunscreen for sun and warm clothing.

6. 6.

   Consider a construction site that faces unexpected hot weather during curing. Propose a set of adjustments to ensure quality concrete.

   Hint

   What steps do you take to stay comfortable in unexpected heat?