2.7. Calculation

Try these first

1. 1.

   What formula is used to calculate compressive strength?

   Hint

   Think about the relationship between load and area.

2. 2.

   What units are typically used for flexural strength?

   Hint

   Recall the common units for measuring pressure.

3. 3.

   What does compressive strength measure?

   • Ability to bend
   • Resistance to axial loads
   • Adhesion properties

   Hint

   Think about what load a structure needs to support.

4. 4.

   True or False: Flexural strength is only relevant for beams.

   • True
   • False

   Hint

   Consider other concrete applications like slabs.

5. 5.

   A structural engineer must design a concrete beam that can hold a load of 50 kN. Based on experimental testing, the beam’s flexural strength is calculated as 5 N/mm². Compute the width and depth required if the span length is 2 m.

   Hint

   Think about rearranging the formula to find dimensions based on desired strength.

6. 6.

   If a concrete cylinder is tested till failure and shows a split tensile strength of 1.5 N/mm², compute the maximum load applied if the diameter is 300 mm and length is 600 mm.

   Hint

   Apply the formula while solving for P.