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Nov 30, 2018 / By System Admin / in Fine Aggregates
Environmental factors and a shortage of good quality river sand has led to the invention of Manufactured Sand Also known as M Sand or Robo Sand
Parameters |
M Sand |
River Sand |
Process |
Manufactured in a factory. |
Naturally available on river banks. |
Shape |
Angular and has a rougher texture. Angular aggregates demand more water. Water demand can be compensated with cement content. |
Smoother texture with better shape. Demands less water. |
Moisture Content |
Moisture is available only in water washed M Sand. |
Moisture is trapped in between the particles which are good for concrete purposes. |
Concrete Strength |
Higher concrete strength compared to river sand used for concreting. |
Lesser concrete compared to M Sand |
Silt Content |
Zero silt |
The minimum permissible silt content is 3%. Anything more than 3% is harmful to concrete durability. We can expect 5 - 20% slit content in medium-quality river sand. |
Over-Sized Materials |
0%. Since it is artificially manufactured. |
1 - 6% of minimum oversized materials can be expected. Like pebble stones. |
Marine Products |
0% |
1 - 2% like seashells, tree barks, etc |
Eco-Friendly |
Though M Sand uses natural coarse aggregates to form, it causes less damage to the environment as compared to river sand. |
Harmful to the environment. Eco imbalances, reduce groundwater level and rivers water gets dried up. |
Price |
M Sand price ranges from Rs.35 - Rs.45 per cubic feet in Bangalore. |
River sand price ranges from Rs 60 - 80 per cubic feet in Bangalore. |
Adulteration |
The probability of adulteration is less. |
High probability of adulteration since filtered sand (a type of pre-washed sand that contains high silt contents) is mixed together. |
Applications |
Highly recommended for RCC purposes and brick/ block works. |
Recommended for RCC, plastering, and brick/ blockwork. |
Quality |
Better quality control since manufactured in a controlled environment. |
No control over quality since it is naturally occurring. Same river bed sand can have differences in silt contents. |
Particle passing 75 micron |
Up to 15% (IS: 383 - 1970) |
Up to 3% (IS:383 - 1970) |
Dec 13, 2022 by System Admin
Jul 07, 2021 by System Admin