4.7. Testing Methods for Creep and Shrinkage

Try these first

1. 1.

   What is the purpose of the Drying Shrinkage Test?

   Hint

   Think about how concrete dries.

2. 2.

   What does autogenous shrinkage involve?

   Hint

   Remember, no moisture exchange.

3. 3.

   What does the Drying Shrinkage Test measure?

   • Water content
   • Length change over time
   • Compressive strength

   Hint

   Think about moisture and drying.

4. 4.

   True or False: Autogenous shrinkage is caused by moisture loss.

   • True
   • False

   Hint

   Consider what happens in sealed conditions.

5. 5.

   Design a test plan that includes drying and autogenous shrinkage testing for a new concrete mix. What would your parameters and observations be?

   Hint

   Consider the details on how long you’ll monitor each specimen.

6. 6.

   Discuss how you would differentiate between creep and shrinkage in a project’s concrete evaluation. What methods might you employ?

   Hint

   Refer back to the tests we discussed earlier.