4.8. Environmental Considerations and Sustainable Concrete

Try these first

1. 1.

   What percentage of global CO₂ emissions does cement production contribute?

   Hint

   Think about its contribution relative to other industrial processes.

2. 2.

   Name one type of SCM.

   Hint

   Consider materials that enhance concrete properties.

3. 3.

   What is the primary reason for the high carbon footprint in concrete?

   • Use of water
   • Cement production
   • Transportation

   Hint

   Think about which ingredient in concrete has the highest environmental impact.

4. 4.

   True or False: Using recycled aggregates can decrease concrete's durability.

   • True
   • False

   Hint

   Consider the benefits of reusing materials.

5. 5.

   Given that cement production contributes significantly to CO₂ emissions, propose a sustainable concrete mix design using various SCMs, detailing their impacts on strength and emissions.

   Hint

   Consider the balance between performance and environmental impact.

6. 6.

   Analyze a life cycle of a typical concrete structure and identify at least three stages where CO₂ emissions can be reduced. Provide strategies for each stage.

   Hint

   Trace the concrete's journey and think about where waste can be minimized.