green concrete

1. BY
VODEPALLI MANASWINI
B.TECH. 4/4
CIVIL ENGINEERING
ROLL NO:141248

2. 
 Concrete is a composite construction material made
primarily with aggregate , cement, and water
CONCRETE

3. 
 concrete is the second most consumed entity after
water it accounts for around 5% of the world‘s total
CO2 emission
 Carbon dioxide is one of the green house gas which
is responsible for global warming
IMPACT ON ENVIRONMENT
DUE TO CONCRETE
1. Green house gas emission

4.  The main ingredient in concrete is cement and it consists of
Limestone (Calcium Carbonate CaCO3)
 During manufacture of cement, its ingredients are heated to
about 800 - 10000C.
 During this process the Carbon Dioxide is driven off
CaCO3 CaO + CO2
 Approximately 1kg of cement releases about 900gms of
Carbon Dioxide into the atmosphere.

5.  Major ingredient in the production of concrete is
aggregates without aggregates it is impossible to
produce concrete
 Aggregates are mined from the rock mines and the rate
with which concrete is produced there will be
significant reduction in naturally occurring materials.
2.Reduction in naturally occurring materials

6. 3.Disposal of construction and demolition waste
 Disposal of construction and demolition waste has
become a major problem these days
 According to the report of Technology, Information,
Forecasting, Assessment Council the total amount of
waste from construction industry is estimated to be 12
to 14.7 million tons per annum
 Out of which 7.8 million tons are concrete and brick
waste.
 Because of increasing problems of these wastes many
countries have started researches to use these materials
as source

7. 
 Green concrete means eco- friendly concrete.
 concrete that uses less energy in its production &
produces less carbon dioxide than normal concrete
GREEN CONCRETE

8. 
 Optimizes use of available material
 Better Performance
 Enhanced cohesion workability / consistency
 Reduced shrinkage / creep.
 Durability - Better service life of concrete
 Reduced carbon footprint
 No increase in cost
 LEED India Certification
FEATURES OF GREEN
CONCRETE
The concrete which can fall in the category of green
must have the following characteristics.

9. 
 Resource Efficiency
 Indoor Air Quality
 Energy Efficiency
 Water Conservation
 Affordability
MATERIAL SELECTION
CRITERIA

10. 
1.Cement
REPLACEMENT OF MATERIAL
FOR GREEN CONCRETE
sludge ash
municipal solid
waste fly ash.

11. 2. Coarse aggregates
Recycled aggregates recycled aggregates with crushed glass
blast furnace slag

12. 3.Fine aggregates
Fine recycled aggregate demolished brick waste
quarry dust
waste glass powder
marble sludge powder Micro silica

13. 
 Lasts Longer
 Uses Industrial Waste
 Reduces Energy Consumption
 Reduces CO2 Emissions
ENVIRONMENTAL BENIFITS BY
USING GREEN CONCRETE

14. 
 Using light weight aggregates, the density of the
concrete decreases to 300 to 1850 kg/m3
 The use of lightweight concrete provides structural
efficiency and economic advantages.
 It helps in reduction of the dead load, increases the
progress of the building, and lowers haulage and
handling costs
 relatively low thermal conductivity
LIGHT WEIGHT AGGREGATES

15. 
 Structural Light Weight Aggregate Concrete is a
concrete having 28 day compressive cement strength
more than 17 MPa and 28 day air dried unit weight
not exceeding 1850 kg/m3.
 The concrete may consists entirely of light weight
aggregate or a combination of light weight
aggregate and normal weight aggregates
 Use of air-entrainment will greatly improve the
workability, and the tendency for bleeding in the
light-weight concrete.
STRUCTURAL LIGHT WEIGHT
CONCRETE

16. 
 This cement is based on an intermediate product, clinker,
which is produced with minor additions of mineralizes to
the kiln..These mineralizes are Calcium Sulphate (CaSO4)
and Calcium Fluoride (CaF2).With the addition of these
mineralizes, the energy consumptions are reduced by 5%.
Also the CO2 emissions get reduced. It is found that there
is a 5-10% increase in 28-day strength of the cement
GREEN CEMENT

17. 
 Reduce the dead weight of a structure and reduce
crane age load
 Good thermal and fire resistance, sound insulation
than the traditional granite rock
 Improve damping resistance of building.
 Speed of construction, shorten overall construction
period.
 Green concrete requires less maintenance and repairs
 Green concrete sometimes give better workability
than conventional concrete
SUITABILITY OF GREEN CONCRETE
IN STRUCTURES

18. 
 Optimized mix designs mean easier handling, better
consistency and easier finishing
 Reduction in shrinkage & creep
 Green Concrete uses local and recycled materials in
concrete.
 The heat of hydration of green concrete is
significantly lower than traditional concrete
 This result in a lower temperature rise in large
concrete pours which is a distinct advantage for
green concrete
ADVANTAGES OF GREEN CONCTERE

19. 
 Mix can result in a reduced paste volume within the
concrete structure resulting in a higher level of
protection against concrete deterioration.
 Higher strength per kilogram of cement
 Increased durability & lower permeability
 More aggregates typically mean higher Modulus of
elasticity.
IMPROVED ENGINEERING
PROPERTIES

20. 
 By using stainless steel, cost of reinforcement
increases.
 Structures constructed with green concrete have
comparatively less life than structures with
conventional concrete.
 Split tension of green concrete is less than that of
conventional concrete
LIMITATIONS

21.  Green concrete having reduced environmental impact with
reduction of the concrete industries co2 –emissions by 30%.
 Green concrete is having good thermal and fire resistant.
 In this concrete recycling use of waste material such as ceramic
wastes, aggregates, so increased concrete industry’s use of
waste products by 20%.
 Hence green concrete consumes less energy and becomes
economical.
 So definitely use of concrete product like green concrete in
future will not only reduce the emission of co2 in environment
and environmental impact but also economical to produce.
CONCLUSION

22.  “concrete technology” – M.S.SHETTY
 https://en.m.wikipedia.org/wiki/Environmental_impact_of_c
oncrete
 http://www.greenconcrete.info/recycled.html
 IOSR Journal of Mechanical and Civil Engineering (IOSR-
JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 14, Issue 3
Ver. II (May. - June. 2017), PP 33-35 www.iosrjournals.org
 Orsos, T., ‘BST: The Lightweight concrete aggregate’, Concrete
Institute of Australia seminar on Special UseConcretes,Melbourne,
1992.
 B.L.Rajput and Indrasen Singh, “Green Concrete- An
Overview”, Indian Highways Journal, February 2012
REFERENCES

23. THANK YOU