GREEN CONCRETE

BYDEEPAK C GUSN :4JC10CT20ROLL NO: 20

CONTENTS

INTRODUCTION

FLYASH AND MICROSILICA

GREEN LIGHTWEIGHT AGGREGATES

GREEN CEMENT WITH REDUCED ENV. IMPACT

PRODUCTION OF GREEN CONCRETE

SUITABILITY OF GREEN CONCRETE IN STRUCTURES

ADVANTAGES

APPLICATION OF GREEN CONCRETE

LIMITATIONS

SCOPE IN INDIA

CONCLUSION

The concrete is made with concrete wastes which is eco-friendly

so called as “Green concrete”.

The other name for green concrete is resource saving structures with

reduced environmental impact for e.g. Energy saving ,co2

emissions, waste water.

.

INTRODUCTION

SLAG

FLYASH MINING WASTES

SINTERED FLYASH LIGHT WEIGHT AGGREGATE

When fly ash is added to concrete. it reduces separationincreases the workability and

reduces permeability.  Fly ash cement has greater

corrosion resistance, substantially higher fire resistance (up to 2400°F)

high compressive and tensile strengths, a rapid strength gain, and lower shrinkage.  This translates to higher durability.  

FLYASH

Micro silica is a super pozzolan - a finely powdered material which is added to the cementitious matter to increase durability .It has reactive silica content of over 90%.

ADVANTAGESHigher compressive strength by

10-20 %Lower permeability – resistance

to penetration of water, chloride & other chemicals

Controls bleeding in fresh concrete

Lower Heat of Hydration, which prevents formation of cracks.

 

MICROSILICA

Synthetic lightweight aggregate produced from environmental

waste is a viable new source of structural aggregate material.

The uses of structural grade lightweight concrete reduce

considerably the self-load of a structure and permit larger

precast units to be handled.

Water absorption of the green aggregate is large but the crushing

strength of the resulting concrete can be high.

Green lightweight aggregates

Recycled aggregates

Section of light aggregates Highly workable fresh concrete

fig. shows bonding between steel bars and lightweight concrete

The cement industry contributes about 5% to global CO2

emissions, making the cement industry an important sector

for CO2-emission mitigation strategies.

By replacing cement with fly ash, micro silica in larger

amounts the emission is substantially reduced

GREEN CEMENT WITH REDUCED ENV. IMPACT

Concrete with inorganic residual products (stone dust, crushed

concrete as aggregate.)

ceramic wastes used as green aggregates.

By replacing cement with fly ash, micro silica in larger amounts.

To use residual products from the concrete industry, i.e. stone dust

and concrete slurry

To use new types of cement with reduced environmental impact.

(mineralized cement, limestone addition, waste-derived fuels).

PRODUCTION OF GREEN CONCRETE

SUITABILITY OF GREEN CONCRETE IN STRUCTURES

Reduce the dead weight of a facade from 5 tons to about 3.5 tons.

It allow handling, lifting flexibility with lighter weight.

Good thermal and fire resistance, sound insulation than the traditional granite rock.

Improve damping resistance of building.

speed of construction, shorten overall construction period.

Reduction of the concrete industry's CO2-emmision by 30 %.

Increased concrete industry's use of waste products by 20%. NO environmental pollution and sustainable development. Green concrete requires less maintenance and repairs. Green concrete having better workability than conventional

concrete. Good thermal resistant and fire resistant. Compressive strength behavior of concrete with water cement

ratio is similar to conventional concrete. Flexural strength of green concrete is almost equal to that of

conventional concrete.

ADVANTAGES

Green concrete building

APPLICATION OF GREEN CONCRETE

Green concrete dam Green concrete bridge

Green concrete platform

Green concrete hutGreen concrete columns

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

“Green concrete” is a revolutionary topic in the history of

concrete industry.

As green concrete is made with concrete wastes it does take

more time to come in India because industries having problem

to dispose wastes.

Also having reduced environmental impact with reduction in

CO2 emission.

SCOPE IN INDIA

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.

CONCLUSION