7.3.8. Alkali-Aggregate Reactivity Test

Try these first

1. 1.

   What two types of reactions does the Alkali-Aggregate Reactivity Test assess?

   Hint

   Think about the aggregate types that may react with alkalis.

2. 2.

   What is the acceptable expansion limit in the Alkali-Aggregate Reactivity Test?

   Hint

   Refer to the values stated regarding expansion.

3. 3.

   What is the primary purpose of the Alkali-Aggregate Reactivity Test?

   • A) To test for concrete strength
   • B) To detect potential aggregate reactivity
   • C) To assess the color of the aggregate

   Hint

   Think about what the test focuses on regarding aggregate properties.

4. 4.

   True or False: The acceptable expansion limit in the test is 0.2%.

   • True
   • False

   Hint

   Refer back to the limits defined in our discussion.

5. 5.

   You have three aggregates to test: one known for high reactivity, one commonly used with minimal issue, and one new type. How would you prioritize testing for potential expansion?

   Hint

   Consider the risk each aggregate poses based on previous experiences.

6. 6.

   If a project shows initial signs of expansion linked to alkali reactions, what steps should be taken to mitigate this risk for future constructions?

   Hint

   Think about preventive measures and adjustments to sourcing strategies.