ग्रामीण सड़क निर्माण में, पर्यावरणीय दीर्घोपयोगिता को सुनिश्चित करने अथवा कार्बन पदचिह्न को घटाने के लिए निम्नलिखित में से किसके प्रयोग को अधिक प्राथमिकता दी जाती है ?
- 1.ताम्र स्लैग
- 2.शीत मिश्रित ऐस्फाल्ट प्रौद्योगिकी
- 3.जीयोटेक्सटाइल्स
- 4.उष्ण मिश्रित ऐस्फाल्ट प्रौद्योगिकी
- 5.पोर्टलैंड सीमेंट
नीचे दिए गए कूट का प्रयोग कर सही उत्तर चुनिए :
Read this question in English
In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint?
1. Copper slag
2. Cold mix asphalt technology
3. Geotextiles
4. Hot mix asphalt technology
5. Portland cement
Select the correct answer using the code given below:
(a) 1, 2 and 3 only · (b) 2, 3 and 4 only · (c) 4 and 5 only · (d) 1 and 5 only
उत्तर और व्याख्या · explanation in English
Answer: (a) केवल 1, 2 और 3
Copper slag, cold mix and geotextiles are the green options for rural roads: they reuse industrial waste, save the fuel needed to heat bitumen, or cut the stone and soil needed. Hot mix asphalt and Portland cement are the conventional, energy-hungry materials.
- ✓ 1. Iron, steel and copper slag are on the list of proven technologies with Indian Roads Congress specifications (IRC SP:121-2018) that the rural roads agency (NRIDA) promotes; using this waste reduces demand for quarried aggregate.
- ✓ 2. Cold mix does not require heating the bitumen, which saves fuel and reduces pollution, and PMGSY lists it as a green technology.
- ✓ 3. Geotextiles, such as coir, strengthen the sub-grade soil and protect slopes, and the Rural Development Ministry lists coir geo-textiles among the new technologies under PMGSY.
- ✗ 4. Hot mix needs bitumen and aggregate to be heated, which is exactly what cold mix avoids, so it is the conventional, higher-fuel method.
- ✗ 5. Portland cement is the conventional binder; PMGSY's green list is about waste materials, cold mix, waste plastic and geosynthetics, not adding Portland cement.
Remember · Under PMGSY, green rural-road technologies include cold mix, waste plastic, industrial slags and geotextiles, which save fuel and natural aggregate.
Sources
- Adopting Green and New Technologies in PMGSY (NRIDA, Ministry of Rural Development), Internet Archive copy ↗ “In this technology heating of bitumen is not required resulting in saving in fuel and thereby saving of environment.”
- New Technology Initiatives in Rural Roads and Use of Marginal Materials (NRIDA, PMGSY), Internet Archive copy ↗ “Construction & Demolition Waste – IRC 121-2017 Recycling of Bituminous Pavement – IRC120-2015 Iron, Steel & Copper Slag – IRC SP121-2018”
- PIB, Ministry of Rural Development: Use of coir geo textiles in construction of roads under PMGSY (3 August 2021) ↗ “Coir geo-textiles are used for improvement of sub-grade soil strength in road pavements and stabilization of side slopes.”
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). Permalink ·