18.8.2. Hardened Concrete Tests

Try these first

1. 1.

   What is compressive strength?

   Hint

   Think about how much weight a concrete block can handle.

2. 2.

   Why is flexural strength important?

   Hint

   Consider structures that might bend under load.

3. 3.

   What is the primary focus of the compressive strength test?

   • To determine the ability to resist bending
   • To measure load-bearing capacity
   • To assess water resistance

   Hint

   Think about the vertical loads on concrete.

4. 4.

   True or False: Flexural strength measures concrete's ability to resist compression.

   • True
   • False

   Hint

   Consider the forces acting on a beam.

5. 5.

   If a concrete beam has a compressive strength of 35 MPa and a flexural strength of 5 MPa, analyze its suitability for a parking garage structure subjected to 20 MPa compressive and 3 MPa bending loads.

   Hint

   Compare the actual loads against the strengths provided.

6. 6.

   Given a concrete mix design with a water permeability of 3.5 x 10^(-10) m/s, determine whether this mix would be suitable for use in a marine environment.

   Hint

   Consider typical permeability values for marine applications.