The Ultimate Concrete Quiz
by Staff
You have your wheelbarrow, concrete mixer and shovel all ready. But the hard part of making concrete, even with the best of tools, is getting the mixture right. Concrete has been used for centuries, but the concrete mixtures used today have come a long way from the mud mixtures that were once used. Take this quiz to see what you know about how concrete is made.

Which nation is the earliest on record to have used a concrete-type mixture?

  • Egypt
  • Greece
  • Rome

Concrete is a mixture of two components: aggregates and:

  • straw
  • paste
  • sand

What was the aggregate that was used in more primitive times?

  • crushed stones
  • sand
  • straw

How are aggregates categorized?

  • by shape
  • by size
  • by material

What is used as the paste in modern concrete-making?

  • cement
  • mud
  • dough

Which type of cement is most commonly used in concrete production?

  • gypsum cement
  • Portland cement
  • fire cement

What activity is concrete-making compared to?

  • baking
  • knitting
  • exercising

What are concrete admixtures?

  • Ingredients that are unintentionally mixed into the concrete.
  • Ingredients that add to the concrete mixture in some way.
  • When an imbalance of concrete ingredients is intentionally created.

What are premixed bags of concrete good for?

  • small home projects
  • large home renovations
  • large industrial building projects

Within how long does concrete need to be discharged from the drum after water has been added?

  • 30 minutes
  • 60 minutes
  • 90 minutes

What does the term "slump loss" refer to in concrete-making?

  • when concrete falls out of the drum mixer on route to the building site
  • when concrete becomes less workable after a certain time has elapsed
  • when the concrete is too soft and slumps within the steel rods reinforcing its

How is concrete reinforced?

  • with steel mesh
  • with steel rods
  • both of the above

What affects the time concrete takes to dry?

  • temperature
  • sunlight
  • air pressure

What happens to concrete as it dries?

  • It cracks.
  • It shrinks.
  • It weakens.

What substance is used to speed up concrete curing in cold weather?

  • magnesium chloride
  • calcium carbonate
  • calcium chloride