gs1medium

In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint?

  1. 1.Copper slag
  2. 2.Cold mix asphalt technology
  3. 3.Geotextiles
  4. 4.Hot mix asphalt technology
  5. 5.Portland cement

Select the correct answer using the code given below:

  1. A.1, 2 and 3 only
  2. B.2, 3 and 4 only
  3. C.4 and 5 only
  4. D.1 and 5 only
▶ Answer & Explanation

Correct answer: A. 1, 2 and 3 only

Copper slag offers a sustainable alternative for road construction materials, reducing reliance on virgin aggregates and managing industrial waste. Cold mix asphalt technology significantly lowers energy consumption and emissions compared to hot mix asphalt because it does not require high temperatures for mixing and paving. Geotextiles enhance the durability and longevity of roads, thereby reducing the need for frequent repairs and associated environmental impacts.

Source: UPSC gs1 2020

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