8. Experimental Investigation Techniques

Try these first

1. 1.

   What type of specimens are typically used for creep testing?

   Hint

   Think about standard shapes used in laboratory tests.

2. 2.

   Explain the difference between sealed and unsealed specimens in shrinkage testing.

   Hint

   Consider moisture movement for each type.

3. 3.

   What percentage of cube strength is used in creep tests?

   • 10%
   • 20%
   • 30%
   • 40%

   Hint

   Consider the standard testing practices used for concrete.

4. 4.

   True or False: Unsealed specimens are used to measure autogenous shrinkage.

   • True
   • False

   Hint

   Think about moisture presence in each specimen.

5. 5.

   Propose a method for determining which testing method might yield more significant data for understanding long-term performance of a specific concrete structure.

   Hint

   Think about how each method reflects real-world conditions.

6. 6.

   Design a small experiment to measure the effects of humidity on concrete shrinkage. Outline the materials and procedure you would use.

   Hint

   Consider how you will maintain consistent testing conditions.