This research work describes the feasibility of using the thermal industry waste in concrete as partial replacement of cement. The utilization of fly-ash in concrete as partial replacement of cement is gaining immense importance today, mainly on account of the improvement in the long term durability of concrete combined with ecological benefits. The cement has been replaced by fly ash accordingly in the range of 0%, 10%, 20%, 30%, 40%, by concrete mix M20.The experiments will be conducted for compressive strength by using C.T.M machine 7 and 28 days of curing

1. By
T . AKHIL (116K1A0103)
AYESHA TABASSUM (116K1A0105)
B.ASHOK KUMAR (126K5A0102)
G.ABHILASH (116K1A0101)

2. This research work describes the feasibility of using the
thermal industry waste in concrete as partial
replacement of cement. The utilization of fly-ash in
concrete as partial replacement of cement is gaining
immense importance today, mainly on account of the
improvement in the long term durability of concrete
combined with ecological benefits. The cement has
been replaced by fly ash accordingly in the range of
0%, 10%, 20%, 30%, 40%, by concrete mix M20.The
experiments will be conducted for compressive strength
by using C.T.M machine 7 and 28 days of curing.

3. In the view of global warming efforts are on to reduce
the emission of CO2 to the environment. Cement
Industry is major in contributor in the emission of
CO2 as well as using up high levels of energy
resources in the production of cement. By replacing
cement with a material of pozzolanic
characteristic, such as the fly ash, the cement and
the concrete industry together can meet the
growing demand in the construction industry as
well as help in reducing the environmental
pollution. India is a resourceful country for fly ash
generation with an annual output of over 110
millions tones .

4. At present most of the power plants are using
Electro Static Precipitators (ESP)Hence uniform
good quality of fly ash can be collected from these
power plants.
To study the impact of partial replacement of
cement by fly ash on the properties of concrete,
experiments were conducted on different concrete
mixes.
This paper present the detailed of experimental
set up and discussion on test results

5. A by-product or the finely divided residue resulting from
the combustion of pulverized coal in thermal power plants.
Fly ash is generally captured by precipitators.
Depending upon the source and makeup of the coal being
burned, the components of fly ash vary considerably, but
all fly ash includes substantial amounts of silicon dioxide
(SiO2) (both amorphous and crystalline) and calcium
oxide (CaO) .
Fly ash particles are generally spherical in shape and range
in size from 0.5μ to 300 μ.

6.  Two classes of fly ash are defined by ASTM C:618 CLASS F
& CLASS C fly ash.
CLASS F FLY ASH
 The burning of harder, older anthracite and bituminous coal
typically produces Class F fly ash. and contains less than
20% lime (CaO).
CLASS C FLY ASH
 Fly ash produced from the burning of younger lignite or sub
bituminous coal, Class C fly ash generally contains more
than 20% lime (CaO)..
 Here we used class F fly ash in mix, because we mostly use
class F fly ash and more over class C fly ash is not available
in our country.

7.  Improved workability.
 Decreased water demand.
 Reduce heat of hydration.
 Increased ultimate strength.
 Reduced permeability.
 Improved durability.

8.  Experimental investigation was planned to study the effect of partial
replacement of cement by fly ash on strength properties of concrete.
MATERIALS :
CEMENT : O.P.C of 53 grade from single batch was used for the whole
work. The fineness of cement when tested as per I.S 4031-1968 was
10%.
 Initial setting time was 30 minutes.
 Final setting time was 600 minutes.
 Specific gravity of cement was found to be 3.09
FINE AGGREGATE : Fresh river sand free from organic matter, from local
sources was used, after sieving through 4.75mm sieve.
 Specific gravity of sand is found to be 2.53.
 Fineness modulus is 3.38.

9. COARSE AGGREGATE : Crushed granite stone aggregate of
10mm &20mm nominal size was used throughout the work.
 Specific gravity of stone aggregate was found to be 2.745
 Fineness modulus is 7.36
FLY ASH : The fly ash used in the investigation was produced
from Ramagundam Thermal Power Station (NTPC).
 This is collected from electrostatic precipitator.
 The fly ash passing from 90 microns sieve was used
throughout the experiment.
 The specific gravity of fly ash is 2.00
WATER : Fresh potable water was used in mixing the
concrete. Water in the required quantities was measured
using a graduated jar and added to the dry mixture.

10. MIXING: The work deals with mixing thereby, the preparation of M20 &
M40 grade concrete as per the mix design.
 Concrete were prepared with a partial replacement of cement by fly ash
percentages of 0, 10, 20, 30, 40
 Cement fly ash were mixed, to which coarse aggregate and fine
aggregate were added and mixed thoroughly.
 Water was measured exactly and added to the dry mix.
CASTING: the cubes were cast in moulds of size 150x150x150mm.
 The standard cube moulds as mentioned above were well mixed and
compacted by means of a standard tamping rod.
CURING: The specimens cast were removed from moulds after 24hrs and
were immersed in a clean water tank and left for curing.
 After the curing was complete, the specimens were removed and allowed
to dry under shade, after which testing was done.
TESTING: The cubes so casted, are tested for stress-strain using a 200
tone C.T.M.

11. • Use of fly ash in concrete imparts several environmental
benefits & thus it is eco-friendly.
• Fly ash in the concrete mix efficiently replaces Portland
cement that in turn can aid in making big savings in
concrete material prices.
• Emission of CO2 is less into the atmosphere by reducing
cement content and reduction in green house gas emission.
 Thus, partial replacement of Portland cement with fly ash,
it can significantly reduce CO2.
 Cost of fly ash is less than Portland cement.

12. • The quality of fly ash to be utilized is very vital.
• Poor quality often has a negative impact on the concrete.
 Thus, it is very much vital to use only high quality fly ash to
prevent negative effects on the building.
 Approximately 1 tonne of CO2 is released into the
atmosphere during the production of 1 tonne of cement.
 Unfortunately, cement manufacturing consumes large
amount of energy about 7.36*106 KJ per tonne of cement.

13. RESULT:
 It is seen that for plain concrete compressive
strength for 7 days and 28 days is observed as
17.38% & 22.37% for M20 mix design.
 It is seen that for replacement of fly ash with
cement compressive strength for 7 days and 28
days is observed as 14.65% & 25.20 % for M20 mix
design.
 The optimum fly ash content shows is observed to
be 30% of cement.
 Hence for economy consideration, cement can be
replaced up to 30% by fly ash, where fly ash is
cheaper than cement.

14. Queries…??

15. Thank You