What is M-Sand?
- M- Sand full name is Manufacturer Sand.
- Sand is one of the important ingredients at making concrete mortar & plaster, etc.
- Earth scientists and organizations are now promoting the use of M-Sand(Manufactured Sand).
- It is produced by crushing of quarry and rocks stones to desired sizes.
- To derive the required sizes, these hard rock deposits are crushed, and this material is segregated in different fractions to suit different construction sites.
- The chemical characteristics and strength of M-Sand(Manufactured Sand) are similar to river sand.
- M-Sand(Manufactured Sand) as a silt content of around 0.2 percent and water absorption of 1.6 percent, as compared to 0.45 percent and 1.15 percent respectively in river sand
- This sand alternative of river sand/natural sand.
- M-sand(Manufactured Sand) cheaper sand as per river sand.
Also, read: What Is Bulkage of Sand (Fine Aggregate )
M-Sand Bonding Strength.
M-Sand is manufactured in a three-stage process:
- Quarry and Rocks stones are crushed at jaw crushers, cone crushers, and vertical shaft impact crushers, respectively leading into the formation of angular and cubical fine aggregate particles.
- Screening ensures this material is properly graded that’s similar to river sand.
- Washing removes all the micro-fine particles. Also, fine aggregates for concrete and plaster sand are also formed.
Also, sand: Lab Test on Aggregates at Site
Advantages of M-sand
- The major advantage of manufactured sand is that it is highly cohesive and compressive in strength.
- It has lesser impurities, which help in producing better quality concrete.
- Moreover, the controlled gradation of Zone-II is possible, suitable for concrete.
- In some case studies, it was found that concrete produced by using manufactured sand obtained 6-9 %(percent) higher compressive strength and 12-15 %(percent) higher flexural strength compared to river sand of the same grade.
- A nearly 30 %(percent) increase in masonry strength is obtained with the use of manufactured sand.
- It requires a lower water-cement ratio if the mortar is mixed with manufactured sand, which also results in better characteristics in the hardened state.
- Manufacturing sand also eliminates the environmental impact that occurred due to the lifting of natural sand from the river bed.
Also, read: What Is Soundness of Cement Test
Disadvantages of M-sand
- Improper crushing of manufacturing sand may lead to angular and flaky particles that are not suitable for concrete production, both technically and economically.
- Also, an adequate set up of crusher may not be available in some parts of the county like West Bengal, as it costs higher than river sand.
- For high-grade pumpable concrete in high-rise buildings, the requirement of cement is higher than the river sand, which may not be cost-effective.
What is River Sand?
- It is naturally available and extracted from the river beds or riverbank.
- Naturally, river sand easy available in the market, this sand larges use in construction.
- The shape of Crushed sand is angular and cubical and has a rough texture and hence, better for concrete.
- River sand use of the construction industry is growing with major trust in infrastructure, and the demand for sand is also increasing.
- This overuse of river sand for construction has many social consequences and undesirable environmental.
- This Sand is used as fine aggregate in mortar concreter, and Natural river sand is this most preferred choice as a fine aggregate material.
- This Sand is becoming a scarce commodity now. This sand is far superior for construction purposes than any other sand used in construction.
Also, read: What Is Cement | Type of Cement
Difference Between M Sand and River Sand
|1||M-Sand manufactured in a factory ||This naturally available on river banks|
|1||The source of Crushed sand is a quarry. It is manufactured by quarry stones, Crushing rocks, or larger aggregate pieces into sand size particles in a factory or quarry.||This is naturally available and extracted from the riverbanks or river beds.|
|2||The shape of natural sand is rounded and has a smooth surface.|
|3||No moisture content.||Moisture is generally present between the particles. Hence, it affects the assumptions of concrete mix design and quality of concrete.|
|4||This sand highly recommended for RCC purposes and brick/block works.||River sand is recommended for RCC, plastering and brick/blockwork.|
|5||Particle passing 75 microns: Up to 15% (IS: 383-1970)||Particle passing 75 microns: Up to 3% (IS: 383-1970)|
|6||M-sand specific gravity is approximate 2.73 (Depend on parent rock.)||River sand specific gravity is approximate 2.65 (Depend on rocks in the catchment area.)|
|7||M-sand dry density of 1.75 kg/m3||Naturally Sand dry density of 1.44 kg/m3|
|8||M-sand is manufactured to conform to zone II.||this sand mostly conforms to zone II and zone III|
|9||This is less adulteration.||this is a high probability of adulteration because of acute shortage. Natural sand adulteration with saline sea sand is common in coastal areas.|
|10||M-sand less damage to the environment as compared to natural sand.||This river sand is harmful to the environment. It reduces the groundwater level and rivers water gets dried up.|
Also, read: What is CBR Test in Civil
Comparison of M-Sand and River Sand
|Is Sieve||M-Sand % Age Passing||River Sand % Age Passing||% Age passing for single
sized aggregates of
Normal Sand 115
383 – 19701 Zone II
|4.75 mm||99.75||99.25||100 to 90|
|2.36 mm||78.25||93.50||100 to 75|
|1.18 mm||52.00||48.00||90 to 55|
|600 microns||38.00||21.00||59 to 35|
|300 microns||21.00||4.00||30 to 08|
|150 microns||5.00||0.05||10 to 0|
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