The correct answer is: A. Less
The compressive strength of a concrete cube is the maximum compressive stress that a concrete cube can withstand before it fails. The compressive strength of a concrete cube is affected by a number of factors, including the type of cement, the water-to-cement ratio, the aggregate type and size, the curing method, and the age of the concrete.
In general, the compressive strength of a concrete cube increases with the increase in the size of the cube. This is because the larger the cube, the more material there is to resist the compressive force. However, there is a limit to this increase, as the concrete will eventually become too thick and will not be able to withstand the compressive force.
The compressive strength of a 100 mm cube is always less than the compressive strength of a 150 mm cube. This is because the 150 mm cube has more material to resist the compressive force.
The following are the explanations of each option:
- A. Less The compressive strength of a 100 mm cube is always less than the compressive strength of a 150 mm cube. This is because the 150 mm cube has more material to resist the compressive force.
- B. More The compressive strength of a 100 mm cube is always more than the compressive strength of a 150 mm cube. This is not true. The compressive strength of a 100 mm cube is always less than the compressive strength of a 150 mm cube.
- C. Equal The compressive strength of a 100 mm cube is always equal to the compressive strength of a 150 mm cube. This is not true. The compressive strength of a 100 mm cube is always less than the compressive strength of a 150 mm cube.
- D. None of the above The compressive strength of a 100 mm cube is always less than the compressive strength of a 150 mm cube. This is the correct answer.