Civil Services Prep

Prelims 2020 · Environment · Question 96

Steel slag can be the material for which of the following?

  1. Construction of base road
  2. Improvement of agricultural soil
  3. Production of cement.

Select the correct answer using the code given below:

  1. 1 and 2 only
  2. 2 and 3 only
  3. 1 and 3 only
  4. 1, 2 and 3

Answer

1, 2 and 3

1. Construction of base road — Correct. Steel slag is widely used as an aggregate/sub-base material in road construction because of its strength and durability.

2. Improvement of agricultural soil — Correct. Basic steel slag contains lime, silica and some micronutrients; it is used as a soil amendment to reduce acidity and improve soil quality.

3. Production of cement — Correct. Steel slag can be used in cement manufacture/blended cement as a raw material due to its calcium- and silica-rich composition.

Therefore, all three statements are correct.

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