2.4. Test Specimens

Try these first

1. 1.

   What does the compressive strength test measure?

   Hint

   Think about the load-bearing capacity.

2. 2.

   What shape are the specimens used for compressive strength tests?

   Hint

   Recall the dimensions we discussed.

3. 3.

   What does the compressive strength test measure?

   • Maximum load before failure
   • Minimum load a beam can carry
   • Tensile strength

   Hint

   Focus on what happens when concrete fails.

4. 4.

   True or False: The bond strength test is crucial for load transfer between concrete and steel.

   • True
   • False

   Hint

   Consider the function of reinforcing steel.

5. 5.

   Considering that a concrete cylinder has a diameter of 150 mm and a length of 300 mm, calculate the tensile strength if the load at failure is 50 kN.

   Hint

   Make sure to convert units where necessary.

6. 6.

   A beam with dimensions 150 mm x 150 mm x 700 mm failed under a load of 30 kN. Calculate the flexural strength using third-point loading.

   Hint

   Remember to use the right dimensions for width and height.