10.1. Carbon Footprint of Concrete

Try these first

1. 1.

   What does the term 'carbon footprint' refer to?

   Hint

   Think about emissions related to production.

2. 2.

   Name one supplementary cementitious material.

   Hint

   It’s a byproduct of coal combustion.

3. 3.

   What is the main contributor to CO₂ emissions in concrete production?

   • Aggregate Mining
   • Cement Production
   • Transportation

   Hint

   Consider the production methods.

4. 4.

   True or False: Recycled aggregates can diminish the carbon footprint of concrete.

   • True
   • False

   Hint

   Think about the environmental benefits of recycling.

5. 5.

   Discuss the environmental impacts of cement versus using alternative materials such as fly ash in a concrete mix. How do they compare in terms of carbon footprint?

   Hint

   Assess both life cycles in your response.

6. 6.

   Calculate the potential carbon savings from using 50% recycled aggregates in a concrete mix versus 100% virgin aggregates. Assume CO₂ emission factors are known.

   Hint

   Use the formula: (Emission Reduction from Recycling) = (Emission Factors) x (Volume Difference).