5.2.3.2. Chemical Stability

Try these first

1. 1.

   What does chemical stability in aggregates refer to?

   Hint

   Think about how aggregates react with substances in cement.

2. 2.

   Name one common issue caused by poor chemical stability.

   Hint

   What kind of reaction can occur due to aggregates?

3. 3.

   What is the effect of the alkali-silica reaction on concrete?

   • Increases strength
   • Causes expansion and cracking
   • Improves durability

   Hint

   Think about what happens when certain aggregates react with cement.

4. 4.

   True or False: All aggregates are safe to use without testing for chemical stability.

   • True
   • False

   Hint

   Consider why we test materials before use in concrete.

5. 5.

   You are a civil engineer selecting aggregates for a new highway project. What are the steps you would take to ensure chemical stability throughout the construction process?

   Hint

   Think about both selection and evaluation processes.

6. 6.

   A client receives complaints about cracking in their newly constructed concrete pavement. They suspect it may be due to reactive aggregates. What methods can they use to confirm and address this issue?

   Hint

   Consider both testing and remediation strategies.