2. Submitted To:
Sir Shafiullah
Submitted by:
Huzaifa Shafiq (797)
Muhammad Abdullah Ijaz (798)
Afzaal Ahmad (850)
Numan Majeed (789)
Jamil Alam (801)
Umer Perveez (788)

3. Topic
Aggregates

4. Definition
Aggregate is a type of material used in
construction, including sand, gravel, crushed tones
etc.
Purpose of Aggregates
 Strength
 Weight
 Economically

5. Uses Of Aggregates
Concrete
Roads
Railway

6. Types Of Aggregates
Classification according to formation
Classification according to size

7. Classification according to formatting
Natural Aggregates
Artificial Aggregates

8. Natural Aggregates
Natural aggregates
consists of rock
fragments that are
Used in their natural
state, or are used after
mechanical
Processing such as
crushing, washing, and
sizing.

9. Artificial Aggregates
For making special type
of concrete we should
make special type of
artificial aggregates. In
these aggregates most
are light weight
aggregates and heavy
weight aggregates

10. Classification According to Size
Fine Aggregates
Coarse Aggregate

11. Fine Aggregates
“Fine aggregate”
is defined as
material that will
pass a No. 4 sieve
and will, for the
most part, be
retained on a No.
200 sieve

12. Types Of Fine Aggregates
Sand
Stone dust
Cinder
Surkhi

13. Sand
The first type of fine
aggregate is Sand. Sand is
little particles of
silica. Larger particles are
categorized as gravel;
smaller particles are
categorized as silt or clay.

14. Types of Sand
Pit Sand
River Sand
Sea Sand

15. Pit Sand
Sand from a pit, as
distinct from river
or sea sand. When
we washed and
screened it is good
sand for general
purposes.

16. River Sand
River Sand
obtained from the
banks and beds of
rivers is also coarse
and fine. Coarse
sand is best for use
in construction
works.

17. Sea Sand
This sand is
obtained from the
shore of sea. The
shape of this sand
is rounded. Due to
water of sea it
mixes with
different
chemicals.

18. Stone Dust
This is the 2nd type
of fine aggregate.
Stone dust is a finely
crushed material
used to fill in the
spaces between
gravel

19. Cinder
Cinder is the slag
from a metal
furnace. Before use
this slag we crushed
this so that its size
remains in fine
aggregate.

20. Surkhi
Surkhi is finely
powdered burnt
clay and
generally made
from slightly
under burnt
bricks.

21. Coarse Aggregate
Course aggregate
basic material of the
concrete. Crushed
stone or gravel used in
concrete are called
coarse aggregate and
it will not, pass when
it is dry through a
sieve with ¼-inchdiameter.

22. Types of coarse Aggregates
Stone Ballast
Gravel
Brick Ballast
Clinker

23. Stone Ballast
Stone ballast
produced by mining a
suitable rock deposit
and breaking the
removed rock down
to the desired size
using crushers.

24. Gravel
Gravel is a mix of
rock pieces or small
rocks. These are
also called rounded
rocks.

25. Brick Ballast
For unimportant
works we can use
brick ballast in
concrete as coarse
aggregates. For
this purpose well
burned bricks are
chosen.

26. Clinker
Clinker is uses for
produced Portland
cement. It may also be
combined with other
active ingredients or
chemical admixtures
to produce.