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M sand
1. M-SAND as fine
aggregate in concrete
PRESENTED BY -–
AJAY.B.K
5th SEM Civil engg
Bapuji polytechnics
Shabanuru
2017-18
2. What is M-sand ?
Manufactured sand is a substitute of river
for construction purposes sand 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.
And it is also called as ‘ROBO SAND’
3. Why Manufactured Sand is Used?
Manufactured sand is an alternative for river sand.
Having more good quality than the river sand.
Availability and transportation of M sand.
Cost of construction is less by using this sand.
It is well graded in the required proportion.
Absorption of water by M sand is very less.
4. Properties of M-sand in concrete
High strength of concrete
Durability of concrete
Workability of concrete
Less Construction Defects
Economy
Eco-friendly
6. PRIMARY CRUSHING
The raw mined material is
brought to the crusher plant by
rear-dump haulers or front-end
loaders. Primary crushing
reduces this run of mine rock to
a more manageable size. The
two types of primary crushers
are the compression (jaw
crushers and gyratory crushers).
JAW CRUSHERS
7. SECONDARY CRUSHING
The secondary unit is basically the same as the
primary crusher except it reduces the stone to
an even smaller size. It consists of a
reciprocating feed hopper, an overcrusher
conveyor, a two-deck vibrating screen, a
compression crusher, an undercrusher return
conveyor, a revolving elevator wheel, a diesel
power unit, and conveyors.there are three
types crushers.They are :-
1. Cone crusher
2. Roll crusher
3. Hammer mill CONE CRUSHER
8. VERTICAL SHAFT IMPACTOR (VSI)
Working principle of vertical shaft
impactor is totally different than
horizontal shaft impactor. It has a high
speed rotor with wearing resistant tips
and main chamber (crushing chamber)
is designed in such a way so that
speed rotor throw the rocks against
the high crushing chamber. In vertical
shaft impactor crusher predominant
force is the velocity of speed rotor.
10. HORIZONTAL SHAFT IMPACTOR (HSI)
Horizontal shaft impactor (HSI)
crusher consists of hammers that
are fixed to the spinning rotor.
Hammers are utilized for the
breaking of these rocks.
Normally horizontal shaft
impactor crusher is used for soft
materials and materials like
gypsum, phosphate, limestone
and weathered shales.
12. SCREENS
Screens are essential to the
final aggregate product. The
right screen selection will
allow uninterrupted production
of aggregate. Screens separate
crushed rock into two or more
particle size ranges. Screens
are also used to remove
oversized rock before they get
into the secondary hopper and
to separate out very small
particles, also known as fines.
VIIBRATORY SCREEN
