M-SAND

M-Sand is manufactured sand, obtained from specific hard rock

(granite) using the state-of-the-art International technology. Its

numerous advantages over river sand have made it a favorite and a

"Must-to-Use" with quality conscious builders.

M-Sand is cubical in shape and is manufactured using international

technology like High  Carbon steel hit rock and then ROCK ON

ROCK process which is synonymous to that of natural process

undergoing in river sand information

Poabs is always been the first to introduce these technological bliss

for the good use of the construction industry in South India. In line

with the manufacture of sand in bulk quantity, have procured the

world's best and state of the art equipments and installed them at

various safe stations in Kerala complying with every scientific

parameters set for producing Manufactured Sand(M-Sand).

Modern and imported machines VSI(Vertical Shaft Impact) are

used to produce M-Sand, ensuring to IS 383 ZONEII. For quality

control, has engaged in a scientific tie-up with the RND lab and

department heads of Trivandrum Engineering College who

rigorously and constantly monitor our production at every stage.

This exceptional kind of technical support always assures us to

maintain consistency in quality as well as to upgrade our

technology from time to time.

The particle shape of the aggregates is very important for making

concretes. It is a well known fact that the sand having cubical

particles with grounded edges gives higher tensile strength and

compression strength to the concrete. The grains should be of

durable material and the size of the grains must be such that it

should give minimum voids. The presence of clay and slit is

avoided since it retards the setting of the cement and making

mortar. Experiments shown that considerable variations in strength

of mortar may occur owing to form and variety of the sand

particle. The strength of mortar may differ by about 50% of

average. It is not possible in river sand that all particles should be

of higher strength. This can be achieved only by making sand with

the help of machines. In machine-made sand, we can use the raw

material of higher strength.

The manufactured sand produced by proper machines can be better

substitute to river sand.

There is discrepancy in the river sand for two loads lifted from

same source. Hence to achieve consistent quality, each truck of

sand should be tested. Moreover the sand has to be sieved to

remove stones, slit and clay. In routine average wastage of sieving

are about 35% and extra labour cost involved.  Whereas M-Sand is

ready-to-use-sand with no wastage since it do not have organic

impurities. The superior shape and gradation of M-Sand ensures

high strength concrete with significant savings in cement.

ADVANTAGES:

1) M-Sand Quality strength

M-Sand adheres to the highest standards and undergoing the following

quality tests 

1. Sieve analysis

2. Optical Microscopic Study to check the particle shape.

3. Workability (slump test by slump cone method).

4. Cube test for compressive strength.

5. No fear of adulteration with sea sand or muddy soil.

2) Greater Durability

M-Sand has balanced physical and chemical properties that can

withstand any aggressive environmental and climatic conditions as it

has enhanced durability, greater strength and overall economy.  Usage

of M-Sand can overcome the defects occurring in concrete such as

honey combing, segregation, voids, capillary etc.

3)High Strength

The superior shape, proper gradation of fines, smooth surface texture

and consistency in production parameter of chemically stable sands

provides greater durability and higher strength to concrete by

overcoming deficiencies like segregation, bleeding, honey combing,

voids and capillary.

4) Greater Workability

The crusher dust is flaky and angular in shape which is troublesome in

working. There is no plasticity in the mortar which makes it even

difficult for the mason to work, whereas the cubical shape with

grounded edge and superior gradation gives good plasticity to mortar

providing excellent workability.

5) Offsets Construction Defects

M-Sand has optimum initial and final setting time as well as excellent

fineness which will help to overcome the deficiencies of concrete such

as segregation, bleeding, honeycombing, voids and capillary.

6) Economy

Usage of M-Sand can drastically reduce the cost since like river sand, it

does not contain impurities and wastage is NIL.  In International

Construction Scenario, no river sand is used at all, only sand is

manufactured and used, which gives superior strength and its cubical

shape ensures significant reduction in the cement used in the concrete 

7) Eco-Friendly

M-Sand is the only alternative to river sand.  Dredging of river beds to

get river sand will lead to environmental disaster like ground water

depletion, water scarcity, threat to the safety of bridges, dams etc.

Beside with the Government contemplating ban on dredging of River

beds to quarry river sand, as part of the growing concern for

environment protection, M-Sand will be the only available option.

COMPARSION:

The natural river sand was the cheapest resources of sand. However the

excessive mining of rive bed to meet the increasing demand for sand in

construction industry has lead to the ecological imbalance in the state.

Now the sand available in the riverbed is very coarse and contains very

high percentage of silt and clay. The silt and the clay presence in the

sand reduce the strength of the concrete and holds dampness. The

natural river sand is the product of sedimentation. mica, coal, fossils

and other organic impurities are present in the river sand above certain

percentage which make the sand useless for concrete work.

Acute shortage and high price for river sand has lead to the adulteration

of sand with salty sea sand which has raised serious concern among

builders.

Comparison between M-Sand and Crusher Dust

SL. NO. M-SAND CRUSHER DUST

01. Colour Grey Grey

02. Particle Shape Cubically Shaped Flaky

03. Product Manufactured as per IS, BS, ASTM Standards

Elongated (Shapeless)a) It is fractured dust of jaw crusherb) A waste product in production process of stone crusher

04. Manufacturing Process

International technology controlled manufacturing process through imported machines

No controlled manufacturing process as it is the by-product of stone crusher

05. Gradation As per IS 383 - 1970Zone-II

Does not adhere to IS 383 - 1970 or any other standards

06. Suitability for concreting

Recommended for usage in concrete & masonry works worldwide by the concrete technologists.Confirms international standards

Not recommended for use in concrete or masonry works. Does not have quality.

High Strength

The superior shape, proper gradation of fines, smooth surface texture

and consistency in production parameter of chemically stable sands

provide greater durability and higher strength to concrete by

overcoming  the deficiencies like segregation, bleeding, honey

combing, voids and capillary.

Greater workability

The crusher dust is flaky and angular in shape which is troublesome in

working. There is no plasticity in the mortar which makes yet difficult

for the mason to work. Where as the cubical shape with grounded edge

and superior gradation gives good plasticity to mortar providing

excellent workability.

SIEVE ANALYSIS River Sand Vs M-Sand

IS SIEVE RIVER SAND% Age Passing

M-SAND% Age Passing

% Age passing for single sized aggregates of

Normal Sand (IS 383 - 1970) Zone

II

4.75 mm 99.25 99.75 90 to 100

2.36 mm 93.50 78.25 75 to 100

1.18 mm 48.00 52.00 55 to 90

600 Microns 21.00 38.00 35 to 59

300 Microns 04.00 21.00 08 to 30

150 Microns 0.05 5.00 0 to 10

Comparison of Impurities - River Sand Vs M-Sand

  RIVER SAND M-SAND

Marine Products 2 - 4 % Nil

Oversized Materials 6 - 10 % Nil

Clay & Silt 5 - 20 % Nil