green concrete
TRANSCRIPT
GREEN CONCRETE
PRESENTED BY P.NAIMISHA
P.V.SAI LAKSHMI N.PRATHYUSHA
CONTENTS1) What is Green Concrete?2) Why Green Concrete3) Technique followed by Green Concrete4) Requirements of Green Concrete5) Materials for Green Concrete6) Cementious Materials-Fly ash7) Mix Design8) Suitability of Green Concrete in structures9) Applications of Green Concrete10)Advantages of Green Concrete11) conclusion12)References
What is Green Concrete?• Green Concrete is environmentally friendly concrete• Concrete that uses less in energy in its production and produces less
carbon dioxide than normal concrete is green concrete
NEED OF GREEN CONCRETE
• The main ingredient in concrete is cement and it consists of lime stone• During manufacture of cement its ingredients are heated to about 800 c-10000c• During this process carbon dioxide is released• Approximately 1 kg of concrete releases about 900 gms of carbon dioxide in to the atmosphere• Therefore green concrete came in to existence to reduce the emission
of carbon dioxide
TECHNIQUE
It should follow the technique of reduce-reuse-recycle Reduce the green house gas emission Reduce the use of natural resources such as limestone , shale , clay and
natural river sand Use of waste materialsOBJECTIVE The main objective is sustainable development without destruction of
natural resources
REQUIREMENTS OF GREEN CONCRETE• The concrete should have the following requirements to say it as a“GREEN CONCRETE”Optimizes use of available materialsBetter performanceEnhanced cohesion workability/consistencyReduced shrinkage and creepDurability-better service life of concreteReduced carbon foot printNo increase in cost LEED certification
MATERIALS FOR GREEN CONCRTE
The materials which are preferable to use in the Green Concrete are
Locally available
Salvaged , refurnished or remanufactured
Reusable or recyclable
MATERIALS FOR GREEN CONCRETE
• Coarse aggregates are
MATERIALS FOR GREEN CONCRETE
• Fine aggregates are
CEMENTIOUS MATERIALS
• FLY ASH fly ash is a byproduct produced during the operation of coal fired plants. The finely divided particles from the exhaust gases are collected in the electro static precipators. 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
I. Use of good quality fly ash in concrete has shown remarkable improvement in durability of concrete ,especially in aggressive environment
II. Higher ultimate strengthIII. Increased durabilityIV. Improved workability V. Reduced bleedingVI. Reduced shrinkageVII.Increased resistance to alkali - silica reactivity
MIX DESIGN
• The concrete mix design method for such concrete is the same as for conventional concrete. However, the constituent materials shown in figure must pack themselves in such a manner that they occupy minimum volume or give minimum voids in concrete. In figure all individual material has large voids. For getting a dense or impervious green concrete, all such voids must be packed with smaller particles of next type of material.
SUITABILITY OF GREEN CONCRETE IN STRUCTURES
The factors which enhance the suitability of green concrete in structures Reduce the dead weight of the structureGood thermal and fire resistance sound insulation than the traditional
granite rockReduction of concrete industry’s carbon dioxide emission by 30%Increased concrete industry’s use of waste products by 20%No environmental pollution and sustainable developmentGreen concrete requires less maintenance and repairs
APPLICATIONS OF GREEN CONCRETE
ADVANTAGES
• 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
SCOPE IN INDIA
• Green concrete is a revolutionary topic in the history of India
• As green concrete is made with industrial wastes it does take less time to come to India since industries are having the problem with waste disposal
• Also reducing the impact on environment
CONCLUSION
REFERENCES
• Indian concrete journal volume 77-januraary-2003-no-1 green concrete technology by r.m.swamy on page-878• Green concrete using industrial wastes. proceedings, national
conference on advances in building materials, Vellore institute of technology, Vellore• Devadas,manoharan.p.senthamarai.R.M .concrete using ceramic
insulators scraps as coarse aggregates ,proceedings,6th international conferences on concrete• Galvind,munchpetersen,green concrete structural concrete
• WEBSITES• http://www.greenconcrete.dk/• http://www.diamondbide ware hoses.com/green concrete.html.