This document discusses the use of fly ash in concrete. It begins with an introduction and overview of fly ash, including its origin as a byproduct of coal combustion in thermal power plants. It then covers the types and properties of fly ash, how it improves the properties and performance of concrete when partially replacing cement, and the benefits this provides like reduced costs, improved strength and durability. The document also addresses environmental benefits and concludes that fly ash concrete is better suited than normal concrete for applications like road construction.

1. PRESENTED BY
G.NIKHIL KUMAR

2.  GENERAL INTRODUCTION
 TYPES OF FLY ASH
 PROPERTIES OF CEMENT WITH FLY ASH &
FLY ASH
 TESTS ON FLY ASH USING CONCRETE
 USES OF FLY ASH
 BENEFITS OF FLY ASH USING CONCRETE
 APPLICATIONS OF FLY ASH USING CONCRETE
 EFFECT OF FLY ASH ON ENVIRONMENT
 CONCLUSION

3.  The unit cost of
concrete can be
reduced by partial
replacement of cement
with fly ash.
 The disposal of fly ash
is one of the major
issues for
environmental.
 Dumping of fly ash as
waste material causes
severe environmental
problems.

4. 1.ORIGION OF FLY ASH
Residue collected
from the combustion
of natural coal
It is produced by the
thermal power plant
In India , every year
70 million kegs of fly
ash is produced.

5. 2.Why fly ash use in concrete
using fly ash to replace
Portland cement in
concrete not only provides
the benefit of recycling fly
ash but also reduces
emissions.
 Using Fly ash can
reduced the total amount
of energy needed to make
concrete pavement

6. Class F:
produced from the burning of anthracite or
bituminous coal
 Silica, alumina , iron oxide & other constituents
 It is having low calcium content is <15%
 High strength & high degree of workability is low
Class C:
produced from the semi-bituminous coal
 It is having high calcium content is <15%
 High strength &high degree of workability is high
 Relatively high of calcium oxide lesser of silica
,alumina , & iron oxide

7. Fly ash with cement:
 Strength is more
 Durability is high
 Shrinkage is high
 It is harder material
 Plasticity is more
 Segregation is low
Cement :
 Strength is Less
 Durability is less
 Shrinkage is
moderately low
 It is less harder
material
 Plasticity moderately
is less
 Segregation is high

8.  Fresh concrete test
 Hardened concrete test

9. 1.Workability :
 The slumped
concrete takes
various shapes, and
according to the
profile of slumped
concrete, the slump
is termed as true
slump, shear slump
or collapse slump.

10. To determine the quantity of water required to
produce a concrete paste of standard consistency.
The standard consistency is that consistency, which
will permit the vicat plunger to penetrate to a point 5 to
7mm from the bottom of the vicat mould
2.Standard consistency :
3.Compaction factor test :
 C.F=wt of partially compacted concrete/wt
of fully compacted concrete
Compaction factor should not more than 1,
should not less than 0.90

11. Compression strength test:
 Strength=applied load/
cross section area
Flexural strength test:
 Strength=2*3.14/lbd
Tensile strength test :
 Strength=max tensile load/
cross section area

12.  It is improves the
strength
 To increase the
workability of the
concrete
 To reduce the heat of
hydration
 To increase the durability
 To construct cost effect
construction
 To reduce the demand of
land of fly ash disposal
 To save the environment

14.  It is used in
buildings
 It is used in roads
 It is used in bridges
 It is used in dams
also

15.  Global warming and
climate conditions
change are
increasing
important issues
 Many governments
are looking at
different ways to
reduce green house
gas emissions

17.  From this project we conclude that the fly ash
based concrete in road construction is the far
better than normal concrete with out fly ash
 Fly ash use in concrete improves all the
properties of concrete
 To construct the cost –effective construction