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UPSC Prelims 2020 Paper-1 📅 04 Oct, 2020

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:

A
1 and 2 only
B
2 and 3 only
C
1 and 3 only
D
1, 2 and 3
Result Summary
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UPSC Prelims
2020 • 04 Oct, 2020 • Paper-1
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:
Correct Answer
1, 2 and 3
Road Infrastructure Utility: Steel slag, a dense byproduct of steelmaking, is mechanically strong and extremely durable. It is extensively used globally as an e......
Ref/Book : UPSC Prelims 2020
Ref. Subject Environment
Chapter -
Ref. Topic Waste Management
Pg. No -
💡 Analysis & Explanation
Road Infrastructure Utility ▼
Steel slag, a dense byproduct of steelmaking, is mechanically strong and extremely durable. It is extensively used globally as an excellent, cost-effective aggregate material in the construction of road bases and asphalt paving. Statement 1 is correct.
Soil Remediation Properties ▼
Slag is highly alkaline and rich in essential silicates and minerals. It is used in agriculture as a soil conditioner to correct severe soil acidity and provide vital nutrients to plants. Statement 2 is correct.
Industrial Material Replacement ▼
Granulated steel slag possesses latent hydraulic properties, making it highly valuable as a direct replacement or additive in the production of blended Portland cement, effectively lowering the carbon footprint of cement manufacturing. Statement 3 is correct.
Conclusion ▼
All three applications represent standard industrial and environmental repurposing of steel slag.
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