3.23. Recyclability of Demolished Concrete

Try these first

1. 1.

   What is recycled aggregate concrete (RAC)?

   Hint

   Think about what happens to concrete after a building is demolished.

2. 2.

   Name one application of recycled concrete.

   Hint

   Consider where concrete is laid in construction.

3. 3.

   What is a major benefit of recycling demolished concrete?

   • Increases landfill waste
   • Conserves natural aggregates
   • Increases production costs

   Hint

   Think about the materials left available after recycling.

4. 4.

   True or False: Recycled concrete can only be used in structural applications.

   • True
   • False

   Hint

   Consider the different ways concrete can be utilized.

5. 5.

   If a construction site generates 1000 tons of concrete waste, and 200 tons are recycled, what percentage of the concrete waste is being reused?

   Hint

   What mathematical operation will help you find the percentage?

6. 6.

   Consider a new construction project that requires 500 tons of natural aggregate. If 300 tons of recycled concrete is used instead, how much natural aggregate is saved?

   Hint

   Think about what is left after using recycled concrete.