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 :

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Q: (IAS/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 :

question_subject: 

Geography

question_exam: 

IAS

stats: 

0,136,70,8,9,53,136

keywords: 

{'steel slag': [0, 0, 0, 1], 'cement': [0, 0, 1, 4], 'material': [0, 0, 0, 1], 'base road': [0, 0, 0, 1], 'agricultural soil': [0, 0, 0, 1], 'construction': [2, 2, 4, 14]}

Steel slag can indeed be used for all the three uses mentioned.

Option 1: Use in road construction as base material. Steel slag is a byproduct from steel making industry and possesses strong potential to be used as a construction material. It has high hardness and good abrasion resistance and can be used as pavement material providing better skid resistance and minimal wear rate.

Option 2: Improvement of agricultural soil. Steel slag is rich in Lime (CaO) and can be used as a liming material for acidic soils. It has potential to improve soil pH, increase soil fertility, and hence, increase the crop yield.

Option 3: Production of cement. Slag has pozzolanic properties making it suitable to be used as an additive in cement production. Pozzolan`s react with calcium hydroxide to form cementitious compounds making the cement more durable and resistant to water.

Hence, all the mentioned uses of steel slag are correct making option-4 the right answer.