4.8. Calculation

Try these first

1. 1.

   What is the primary indicator of concrete quality?

   Hint

   Think of the first test we discussed.

2. 2.

   Name a standard code related to flexural strength testing.

   Hint

   It starts with 'I' for Indian standards.

3. 3.

   What is the main objective of the compressive strength test?

   • To measure bending strength
   • To determine tensile capacity
   • To determine the maximum compressive load before failure

   Hint

   Focus on what happens last in this test.

4. 4.

   True or False: The bond strength test only measures the adhesion between the steel and concrete.

   • True
   • False

   Hint

   What happens when you pull steel from concrete?

5. 5.

   You have a concrete specimen that can withstand a maximum load of 80 kN and has a cross-sectional area of 0.02 m². Calculate the compressive strength in MPa.

   Hint

   Convert your units correctly before performing the calculation!

6. 6.

   A concrete beam of size 150 mm x 150 mm x 700 mm fails under a load of 12 kN when tested for flexural strength using a third-point loading mode. Compute the modulus of rupture.

   Hint

   Check which dimensions correspond to the beam size when using the formula.