4.5. Test Specimens

Try these first

1. 1.

   What is the main objective of the compressive strength test?

   Hint

   Think about what it means to compress something until it breaks.

2. 2.

   What type of specimen is usually used in tensile strength tests?

   Hint

   Consider the shape used in split tensile tests.

3. 3.

   What is the primary purpose of a compressive strength test?

   • To determine tensile strength
   • To determine the maximum load capacity
   • To evaluate bond strength

   Hint

   Think about what happens to concrete when it's pushed down.

4. 4.

   True or False: Flexural strength is measured using flexible beams.

   • True
   • False

   Hint

   Consider the rigidity of beams versus flexibility.

5. 5.

   Design a testing plan for a new concrete mix. Specify the necessary specimens, testing methods, and what properties you aim to evaluate.

   Hint

   Consider which properties are crucial for your intended application.

6. 6.

   Given a cylindrical specimen with a diameter of 150 mm and a length of 300 mm, if the maximum load at failure was recorded as 300 kN, calculate the tensile strength.

   Hint

   Make sure to convert kN to N for the calculations.