concrete, presentation includes ingredients of concrete , how we can achieve high strength of concrete in less days of curing, practically shown in the presentation according to the standards of ACI.

1. HIGH STRENGTH
CONCRETE
BY MEESUM HUSSAIN ZAIDI
NED UNIVERSITY OF
ENGINEERING AND
TECHNOLOGY

2. Ingredients Of Concrete
Cement
Crush
Fine Aggregate
Water
Admixture (For some special purposes)

3. CEMENT
Cement is made up of
naturally occurring
elements and
materials. In it you can
find clay, limestone,
silica, and more, all of
which are combined in
a cement kiln.

4. CRUSH(COARSE AGGREGATE)
Construction aggregate, or simply "aggregate", is
a broad category of coarse particulate material
used in construction, including sand, gravel,
crushed stone, slag, recycled concrete and
geosynthetic aggregates. Aggregates are the most
mined materials in the world. Aggregates are a
component of composite materials such as
concrete and asphalt concrete; the aggregate
serves as reinforcement to add strength to the
overall composite material.

5. FINE AGGREGATE(FILLER)
Aggregate passing the 3/8" sieve and almost
entirely passing the No. 4 (4.76 mm) sieve
and predominantly retained on the No. 200
(74 micron) sieve (ASTM125).

6. Water
Water is the key ingredient, which when
mixed with cement, forms a paste that binds
the aggregate together. The water causes the
hardening of concrete through a process
called hydration. Hydration is a chemical
reaction in which the major compounds in
cement form chemical bonds with water
molecules and become hydrates or hydration
products.

7. HIGH STRENGTH CONCRETE

8. HIGH STRENGTH CONCRETE
ACI defined high-performance concrete as a
concrete meeting special combinations of
performance and uniformity requirements
that cannot always be achieved routinely
using conventional constituents and normal
mixing, placing, and curing practice.

9. How to make high strength
concrete?

10. WHAT WE USE TO MAKE HIGH
STRENGTH CONCRETE
Total mix ratio 1:2:4
cement (OPC)
Crush
Fine Aggregate
Water
Fly Ash Pozzocrete 100
Fibre

12. Fly Ash Pozzocrete 100
.

14. AMOUNT OF MATERIALS WE ADDED
IN OUR HIGH STRENGTH CONCRETE
MIX
Cement = 3000g
Crush = 12000g
Fine Aggregate =6000g
Water Cement ratio = 44%
Fly ash Pozzocrete 100 = 450g
Synthetic Polypropylene Fibre = 18g

15. Why we use Fly Ash Pozzocrete 100?
Because of its some properties that are given below ,
 High early strength exceeding 70 Mpa (28 days).
 High performance super fine fly ash pozzolanic material.
 Economical and efficient alternative to micro-silica in performance.
 In fresh state, concrete mix is highly cohesive and easy to work in
comparison to harsh and sticky micro-silica mix.
 Reduces heat of hydration.
 To achieve the same slump, Pozzocrete 100 mix has lower water demand
in comparison to micro-silica mix.
 In hardened state, increase compressive strength and the associated
engineering properties such as tensile strength and modulus of elasticity.
 Improves durability and resistance against chloride and sulfate attack.

16. Why we use fibre in our mix?
Because
 fibres in concrete create an advanced internal support system that
inhibits plastic settlement cracking. Fibres distribute evenly in the
concrete mix and inhibit segregation and settlement of the heavier
concrete ingredients. As the heavier ingredients do not drift
downward, the mix water is not displaced. The uniform bleeding
throughout the concrete gives it the optimum long-term integrity.
 fibres increases the tensile strain capacity of concrete
 fibres reduce this micro-crack formation, it enables the concrete to
progress from plastic to hardened state with greater integrity. Thus
the water resistance of hardened concrete is greatly increased.

17. STARTING OF OUR WORK

18. FINING OF CRUSH AND FILLER WITH
SIEVE 1/2 (inch) & 3/8(inch)

19. TEMPERATURE WAS NOTED AND IS
FOUND TO BE 30‘C

20. MIXING OF FINE AGGREGATE AND
COARSE AGGREGATE

21. ADDITION OF POZZOCRETE (100)
ABOUT 400gm IN OUR MIX

22. Mixing of concrete ingredients without
water

23. ADDITION OF WATER(1320ml) IN OUR
MIX

24. Mixing (5 min)

25. POURING MIXTURE IN CUBE(6’’X6’’)

26. USING VIBRATOR DURING POURING
OF MIXTURE

27. LEVELLING SURFACE OF CONCRETE