इस्पात स्लैग निम्नलिखित में से किसके लिए सामग्री हो सकता है ?
- 1.आधार-सड़क के निर्माण के लिए
- 2.कृषि मृदा के सुधार के लिए
- 3.सीमेंट के उत्पादन के लिए
नीचे दिए गए कूट का प्रयोग कर सही उत्तर चुनिए :
Read this question in English
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
उत्तर और व्याख्या · explanation in English
Answer: (d) 1, 2 और 3
Steel slag, the solid waste left when steel is made, is usable in all three ways: as stone-like aggregate in road layers, as a soil conditioner in farming, and as an ingredient in cement.
- ✓ 1. Processed steel slag replaces natural stone aggregate in roads; CSIR-CRRI has framed guidelines for using it in various road works, and a six-lane highway near Surat was built with it.
- ✓ 2. The Ministry of Steel lists agriculture as a use, where the slag stands in for soil nutrients and fertilisers, and its website mentions soil conditioning.
- ✓ 3. The Ministry of Steel names 'green cement' among the uses of steel slag; note that blast-furnace (iron) slag is the type mostly used in cement making today.
Remember · Steel slag is a waste-to-wealth material: road aggregate, soil conditioner, cement ingredient and rail ballast.
Sources
- PIB, Ministry of Steel: Steel Minister inaugurates first six-lane highway made of steel slag at Surat (15 June 2022) ↗ “his Ministry is exploring all other options to utilize such materials in road construction, agriculture as a replacement to soil nutrients and fertilizers, ballast for railways and making green cement.”
- PIB: Guidelines for Utilization of Steel Slag in Road Construction released (1 July 2024) ↗ “the Ministry of Steel sponsored a major R&D project to CSIR-Central Road Research Institute to facilitate large scale utilization of steel slag as substitute of natural aggregates in road construction.”
- Energy and Environment Management in Iron & Steel sector, Ministry of Steel ↗ “The steel industry is finding ways and means to utilize the steel slag in other applications like construction & road making, soil conditioning, rail ballast.”
Question and answer: UPSC's official GS Paper I (2020, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·