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
Correct Answer
Explanation
Steel slag is a versatile byproduct used as a durable aggregate in road bases, a raw material in cement manufacturing, and a soil conditioner to neutralize acidity and provide essential nutrients in agriculture. Candidates often mistakenly exclude Statement 2 (selecting option C) due to concerns about heavy metals, but processed steel slag is a recognized liming agent that improves the productivity of acidic soils. The core concept tested is the "Waste-to-Wealth" principle and the sustainable management of industrial byproducts within a circular economy.
Environmental Technology - Waste UtilizationSteel Slag ApplicationsSteel slagConstruction of base roadImprovement of agricultural soilProduction of cementWaste management