Let us first understand the meaning of quarry dust and m-sand individually.
Quarry dust is a by-product of the crushing process which is a concentrated material to use as aggregates for concreting purpose, especially as fine aggregates. In quarrying activities, the rock has been crushed into various sizes; during the process the dust generated is called quarry dust and it is formed as waste.
Manufactured sand (M-Sand) is a substitute of river sand for concrete construction. Manufactured sand is produced from hard granite stone by crushing. Manufactured sand is an alternative for river sand. Due to the fast growing construction industry, the demand for sand has increased tremendously, causing deficiency of suitable river sand in most part of the word.
The contrary between the two can be understood in the following fields:
Appearance and formation :
- Original M Sand is free from an elongated and flaky particle since it is shaped cubically using VSI shaping machine. The cubically shaped particles give high strength and long life to concrete.
- Quarry dust is an elongated and flaky particle. It is fractured dust of Jaw Crusher. A waste product in the production process of stone crusher.
- Original M Sand is manufactured strictly adhering to IS 383 (1970) zone II grading. Perfect grading and cubical shape of M Sand provides 10-15% more compressive strength for concrete and 25-30% more strength for masonry works compared to crusher dust.
- Quarry dust has no controlled manufacturing process as it is the bi-product of stone crusher. Does not adhere to IS 383 – 1970 or any other standards
Quality and Strength:
- Original M Sand has minus 150 micron less than 10% and minus 45 micron less than 2% only. This helps the concrete to maintain water absorption rate of concrete less than 2% which helps to produce concrete of consistent quality.
- Quarry dust has lesser concrete strength and lower durability. Not recommended for use in concrete or masonry works.
Quality of outcome:
- Original M Sand is graded with precession by removing the microfine correctly and thus it has higher ‘Finess Modules Index’ compared to river sand and crusher dust. This gives good workability for concrete and masonry that help in easy and quick construction.
- In case of Quarry dust, in order not to compromise the strength of building during construction, the dust comes handy as an equal substitute without threat to quality at the same time rendering good strength to constructions.
- Quarry dust come at cheaper cost and lesser pressure on market demand for sand. Partial replacement of sand with this dust will make good concrete that is well desired in residential construction. The final product is strong bricks, slabs or tiles that are produced at lower cost compare to using sand.
- Original M Sand has two grades for concreting and plastering. This saves you the work of filtering the sand. Besides, as there is no loss of sand, you can save money on it.