Daily Current Affairs – 2020
Topic: For Prelims and Mains
Why in News?
- The Rajasthan government has brought a policy on manufactured sand.
- This will give industry status to the units producing it for construction work and will reduce the dependence on riverbed sand.
- The policy will enable the investors to set up M-sand units by utilising the incentives offered by the State government.
- It will also help in environmental protection and generate faith among the public in the efficacy of M-sand for construction works.
- The policy would help create employment opportunities through new units and resolve the issue of huge quantities of waste generated in the mining areas.
What is M-Sand?
- Manufactured sand is produced from hard granite stone by crushing and is used as a substitute of river sand for concrete construction.
- The crushed sand is of cubical shape with grounded edges, washed and graded to as a construction material.
- The size of manufactured sand (M-Sand) is less than 4.75mm.
- It can be dust free and the sizes of m-sand can be controlled easily so that it meets the required grading for the given construction.
- It is well graded in the required proportion.
- It does not contain organic and soluble compounds that affect the setting time and properties of cement, thus the required strength of concrete can be maintained.
- It does not have the presence of impurities such as clay, dust and silt coatings.
- The Supreme Court had on November 16, 2017 restrained 82 large lease holders in the State from carrying out mining of riverbed sand.
- The mining was banned until a scientific replenishment study was completed and the Ministry of Environment and Forest granted the clearance.
- The apex court later appointed a Central Empowered Committee to look into the issue of illegal sand mining.
Facts for Prelims :
Mudumalai Tiger Reserve
- It is located in the Nilgiri district of Tamil Nadu.
- It shares a border with Wayanad Wildlife Sanctuary (Kerala) in the west and Bandipur Tiger Reserve (Karnataka) in the north.
- This reserve is part of the Eucalyptus Biosphere Reserve.
- Eucalyptus is the first biosphere reserve in India.
- It was declared a Biosphere Reserve in the year
- Fauna: tiger, elephant, Indian gaur, panther, sambar, spotted deer, barking deer, mouse deer, common langur, Malabar Giant Squirrel, wild dog, weasel, wild cat, Hyena