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Q: Consider a 12 inches high slump cone having 8 inches in diameter at the top. How many layers of concrete should you place to fill this cone?
  • A. 3 equal layers by height
  • B. 4 equal layers by volume
  • C. 3 equal layers by volume
  • D. 8 equal layers by height
Correct Answer: Option A - According to the procedure of the concrete slump test as per IS1199 : 2018  The mould for the concrete slump test is a frustum of (one, 300 mm (12 inches) of height the base is 200 mm (8 inches) in diameter and it has a smaller opening at the top of 100 mm (4 inches).  The base is placed on a smooth surface and the container is filled with concrete in three layers (each approximately 1/3rd of the height of the mould), whose workability is to be tested.
A. According to the procedure of the concrete slump test as per IS1199 : 2018  The mould for the concrete slump test is a frustum of (one, 300 mm (12 inches) of height the base is 200 mm (8 inches) in diameter and it has a smaller opening at the top of 100 mm (4 inches).  The base is placed on a smooth surface and the container is filled with concrete in three layers (each approximately 1/3rd of the height of the mould), whose workability is to be tested.

Explanations:

According to the procedure of the concrete slump test as per IS1199 : 2018  The mould for the concrete slump test is a frustum of (one, 300 mm (12 inches) of height the base is 200 mm (8 inches) in diameter and it has a smaller opening at the top of 100 mm (4 inches).  The base is placed on a smooth surface and the container is filled with concrete in three layers (each approximately 1/3rd of the height of the mould), whose workability is to be tested.