Rajasthan govt promotes manufactured sand (M-Sand) as easy alternative

Rajasthan govt promotes manufactured sand (M-Sand) as easy alternative

Recently, the Government of Rajasthan is promoting Manufactured Sand (M-Sand) as a better alternative to river sand.

M-Sand is produced by grinding rocks and quarry stones. These are then given a specified size of 150 µm. It is different from the sand extracted from the river.

Benefits of M-Sand

  • It is more cost effective than using natural sand.
  • It reduces the need for natural sand mining, as natural sand mining creates negative environmental impacts.
  • It reduces the amount of water needed for construction projects, as it does not need to be washed before use.
  • It helps in maintaining the water level.

Sand mining in india

  • Sand is classified as a ‘minor mineral’ under the Mines and Minerals (Development and Regulation) Act, 1957. The administrative control of sand mining rests with the state governments.
  • The Ministry of Environment, Forest and Climate Change (MoEFCC) had issued Sustainable Sand Mining Management Guidelines in 2016. These guidelines encourage scientific mining of sand and its eco-friendly management practices.
  • The Ministry of Mines has released the Sand Mining Framework, 2018. It envisages alternative sources of sand in the form of manufacture of M-sand from crushed rock fines (crusher dust) etc.
  • The Central Pollution Control Board (CPCB) has issued environmental guidelines for stone crushing units. These include taking air pollution control measures in stone crushing units.

River Sand

  • M- Concrete strength is less as compared to sand.
  • Due to the excess of flaky, pointed and angular particles, the joints are weak.
  • The silt content is 3-20%. There is no control over the quality, as it is naturally produced. There can be differences in the amount of silt in the sand of the same river bed.

M-Sand (Manufactured Sand)

  • It has higher concrete strength as compared to river sand.
  • The particles of M-sand are cuboidal. This makes strong joints.
  • Has zero silt content.
  • Being manufactured in a controlled environment – it is of superior quality.

Source – Business Standard

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