GREEN CONCRETE

PRESENTED BY : PRESENTED TO :MADUPALLI.AKHIL DEPARTMENT OF U14CE096 CIVIL ENGINEERING DEPARTMENT OF CIVIL ENGINEERING

CONTENTS What is Concrete ? Types of Concrete? What is Green Concrete ? Technique followed by Green Concrete Materials for Green Concrete Cementitious Materials-Fly Ash Suitability Of Green Concrete In Structures Advantages Applications of Green Concrete Scope in INDIA Conclusion References

CONCRETE :Concrete is a mixture of coarse

aggregate,Cement , water and fine aggregate with

mixed Proportions which can be poured in to

formworkAnd form a hard structure like a stone .

TYPES OF CONCRETE Reinforced cement concrete (R.C.C) Plain cement concrete Ready-mix concrete Light weight concrete Fiber reinforced concrete Green concrete

INTRODUCTION Green concrete is an revolutionary topic in

the history of concrete industry, this was first invented in Denmark in year 1998.

Green concrete is the type of concrete which like the conventional concrete but a production of such concrete requires minimum amount of energy and causes less harmful to environment

Green concrete has nothing to do with colour

GREEN CONCRETE? Green concrete is an environmentally

friendly concrete Concrete that made with concrete

waste and uses less in energy in its production and produced less carbon dioxide than normal concrete is green concrete

The main ingredient in concrete is cement and it consists of lime stone

During manufacturing of cement its ingredients are heated to about 800c-10000c

During this process carbon dioxide is released Approximately 1kg of concrete releases about

900gms of carbon dioxide into the atmosphere Therefore green concrete came in to existence to reduce the emission of carbon dioxide

Need of green concrete

WHERE DOES THE CARBON DIOXIDE COME FROM IN CONCRETE?

Cement : Most of CO2 in concrete is from the cement manufacturing process a typical cubic meter of concrete contains about 10% cement by weight .The reaction in this process of

cement manufacture is: CaCO3 = CaO+CO2

TECHNIQUE It should follow 3R‘s Technique Reduce Reuse Recycle Reduce the green house gas emission Reduce the use of natural resources such as lime

stone, shale, clay and natural river sand Use of waste materials objective: The main objective is sustainable development with out destruction of natural resources.

FEATURES OF GREEN CONCRETEThe concrete which fall in the category of green

Must have the following characteristics Optimizes use of available materials Better performance Enhanced cohesion workability / consistency Reduce shrinkage /creep Durability-better service life of concrete Reduce carbon footprint No increase in cost LEED India Certification

Green concrete mix is designed with the principle of “particle-packing optimization” to meet requirements of plastic and hardened properties

Recycled Demolition Waste Aggregate Recycled Concrete Aggregate Blast furnace Slag (BFS) Manufactured Sand Glass Aggregate Fly ash

Materials for Green Concrete

Freshly local Aggregate

Recycled Demolition waste Aggregate

Recycled Concrete Material (RCM)

Blast Furnace Slag(BFS)

Coarse Aggregates are:

Fine Aggregates are:

Manufactured sand

for concrete

Fly Ash

Blast Furnace Slag

Recycled Glass

Aggregate

CEMENTITIOUS MATERIALSFLY ASH Fly ash is a by product during the operation

of coal fired plants. The finely divided particles from the exhaust gases are collected in the electro static precipitators. These particles are called Fly Ash.

Utilization of Fly Ash as a part replacement of cement or mineral admixture in concrete saves on cement and hence the emission of Carbon dioxide.

ADVANTAGES OF FLYASH Use of good quality fly ash in concrete

has shown remarkable improvement in durability of concrete, especially in aggressive environment.

Higher Ultimate Strength Increased durability Improved Workability Reduced bleeding Reduced shrinkage Increased resistance to alkali-silica

reactivity

SUITABILITY OF GREEN CONCRETE IN STRUCTURES

Several factors which enhances the suitability of

Green Concrete in structures include:1. Reduce the dead weight of a structure 2. Good thermal and fire resistance sound

insulation than the traditional granite rock3. Reduce of concrete industry's carbon

dioxide emission by 30%4. Increased concrete industry’s use of waste

products by 20%5. Green Concrete requires less maintenance

and repairs

ADVANTAGE‘S Reduction in creep and shrinkage It uses the local and recycled materials in

concrete The heat of hydration of green concrete is

significantly lower than the traditional concrete

Compressive strength and flexural behavior is fairly equal to that of conventional concrete

Since these are optimized mix designs it is easier to handling

ADVANTAGE‘S Concrete gives good strength to the

structure It is good fire resistant It helps in reducing the consumption of

cement overall Use of fly ash the concrete also

increase its workability and durability Optimized mix design ,easier

handling ,better consistency and easier finishing

APPLICATIONS OF GREEN CONCRETE

SCOPE IN INDIAGreen concrete is a revolutionary topic in the History of concrete industry.As Green Concrete is made with concrete waste

it does take more time to come in India because of Industries having problem to dispose wastes

andIt also reduces environmental impact with reduction in co2 emission . Use of Green Concrete can help us reduce a

lot of wastage of several products

Various non –biodegradable products can

also be used and thus avoiding the issues of

theirdisposal.

CONCLUSION

• Although there are some defects of green technology, everything done should have both positive and negative impacts.

• Global warming and energy crisis cannot be solved with one or two years

• It really requires our determination and continue effort in improving the situation

• Green technology will definitely be the solution that gets the potential in helping us to solve those problems and improve our environment.

REFERENCES Indian concrete journal volume 77-

january-2003-no-1 green concrete technology by R.M.SWAMY on page -878

Websites:- http://www.greenconcrete.dk/ http://www.diamondbidewarehouse.co

m/green concrete.html