01-10-2016, 02:52 PM
1457281781-C06FF64732FA43DD920998E1F90654D7.pptx (Size: 59.62 KB / Downloads: 6)
INTRODUCTION
The concrete is made with concrete wastes which are 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.
Green concrete is a revolutionary topic in the history of concrete industry.
Why Green Concrete?
Huge impact on sustainability
Most widely used material on Earth
30% of all materials flows on the planet
70% of all materials flows in the built environment.
> 2.1 billion tonnes per annum.
>15 billion tonnes poured each year.
Over 2 tonnes per person per annum
What is GREEN concrete?
Most people associate GREEN concrete with concrete that is colored with pigment.
However, it is also referred which has not yet hardened. But in the context of this topic, green concrete is taken to mean environmentally friendly concrete.
This means concrete that uses less energy in its production & produces less carbon dioxide than normal concrete is green concrete.
Features of Green Concrete
Cement
Aggregate
Resources
Materials for Green Concrete
Locally available: Construction materials, components, and systems found locally or regionally, saving energy and resources in transportation to the project site.
Salvaged, re-furnished, or re-manufactured: Includes saving a material from disposal and renovating, repairing, restoring, or generally improving the appearance, performance, quality, functionality, or value of a product.
Reusable or recyclable: Select materials that can be easily dismantled and reused or recycled at the end of their useful life.
Environmental Benefits to using Green Concrete
Lasts Longer
Uses Industrial Waste
Reduces Energy Consumption
Reduces CO2 Emissions
PRODUCTION OF GREEN CONCRETE
Concrete with inorganic residual products. Ceramic wastes used as green aggregates. By replacing cement with fly ash, micro silica in larger amounts.
To develop new green cements and binding materials (i.e. by increasing the use of alternative raw materials and alternative fuels, and by developing/improving cement with low energy consumption).
Green lightweight aggregates
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.
SUITABILITY OF GREEN CONCRETE IN STRUCTURES
Reduce the dead weight of a facade from 5 tons to about 3.5 tons.
Reduce crane age load, 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.
ADVANTAGES
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.