Comparison Analysis

Mason Sand by Shankar Brothers Rajasthan

Manufactured sand is produced from hard granite stone by crushing. 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.


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M-SAND

Manufactured sand is an alternative for river sand. Due to fast growing construction industry, the demand for sand has increased tremendously, causing deficiency of suitable river sand in most part of the word.

Due to the depletion of good quality river sand for the use of construction, the use of manufactured sand has been increased. Another reason for use of M-Sand is its availability and transportation cost.

Since manufactured sand can be crushed from hard granite rocks, it can be readily available at the nearby place, reducing the cost of transportation from far-off river sand bed.

RIVER SAND

Sand is a naturally occurring granular material composed of finely divided rock & mineral particles. It is defined by size, being finer than gravel and coarser than silt.

River sand is becoming a scarce material. Sand mining from our rivers has become objectionably excessive. It has now reached a stage where it is killing all our rivers day by day.  So sand mining has to be discouraged so as to save the rivers. As natural sand deposits become depleted near some areas of metropolitan growth, the use of alternatives to sands as a replacement fine aggregate in concrete is receiving increased attention.

Comparison Analysis

Parameters M Sand River Sand
Process Manufactured in factory. Naturally available on river banks.
Shape Angular and has rougher texture. Angular aggregates demands 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 is good for concrete purposes.
Concrete Strength Higher concrete strength compared to river sand used for concreting. Lesser concrete concrete compared to M Sand
Silt Content Zero silt Minimum permissible silt content is 3%. Anything more than 3% is harmful to the 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 over sized materials can be expected. Like pebble stones.
Marine Products 0% 1 – 2% like sea shells, tree barks etc
Eco Friendly Though M Sand uses natural coarse aggregates to form, it causes less damage to environment as compared to river sand. Harmful to environment. Eco imbalances, reduce ground water 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 Probability of adulteration is less. High probability of adulteration since filtered sand (a type of pre-washed sand which contains high silt contents) are mixed together. As a rule, supply shortage always brings adulterer products to the market.
Applications Highly recommended for RCC purposes and brick/ block works. Recommended for RCC, plastering and brick/ block work.
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)
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