3.14. Quality Control of Aggregates in Site Practice

Try these first

1. 1.

   What is the purpose of quality control in aggregates?

   Hint

   Think about what could happen if the quality is low.

2. 2.

   What might contamination in aggregates lead to?

   Hint

   Consider the effects on physical properties.

3. 3.

   What can contamination of aggregates lead to?

   • Increased strength
   • Weakened bond
   • Improved durability

   Hint

   Consider what 'contamination' implies for physical bonding.

4. 4.

   Is moisture monitoring important in concrete mix design?

   • True
   • False

   Hint

   Think about how it affects water mixing.

5. 5.

   Given a situation where aggregates have been found to have high levels of contaminants after sieving, design a corrective action plan to improve aggregate quality without significant construction delays.

   Hint

   Consider the implications of sourcing and monitoring.

6. 6.

   You are on-site, and moisture tests reveal an unexpected increase in moisture content. Propose how to recalibrate the concrete mix design effectively.

   Hint

   Think about the balance between aggregate moisture and mix design.