AND OF CONSTRUCTION MATERIALS

SOURABH CHOUDHARYRAKESH KUMAR

INTRODUCTION

• Construction waste recycling is the separation and recycling of recoverable waste materials generated during construction and remodeling.

• Construction by nature is not an eco-friendly activity.

NEED FOR ADOPTION OF PROPER METHODS OF RECYCLING

a)It reduces the demand up on new resources.b)Cuts down the cost and effort of transport and

production.c) Use waste which would otherwise be lost to

landfill sites.

FACTORS THAT ASSESS THE QUALITY OF RECYCLED AGGREGATE

• Size distribution:- that recycled aggregates either fine or coarse can be obtained by crushing.

• Absorption :- high in recycled aggregates than in natural aggrigates

• Abrasion resistance :- Use of such aggregates as sub base in flexible pavements show promising results

PROPERTIES OF FRESH RECYCLED AGGREGATE CONCRETE

• The air content of recycled aggregate concrete is slightly higher ( 4-5 % ) than concrete with natural aggregate.

• Bulk density of recycled concrete is less than fresh concrete,

VIABLE TECHNOLOGY ON CONSTRUCTION WASTE RECYCLING

When considering a recyclable material, three

major areas need to be taken in to account are:

• Economy• Compatibility with other materials• Material properties

COMMANLY RECOVERED CONSTRUCTION MATERIALS

• Asphalt Paving• Land Clearing Residuals• Wood• Gypsum Wallboard• Buildings• Metals• Concrete• Roofing(non-asphalt shingles)• Brick

Asphalt Paving Asphalt is crushed and recycled back into new asphalt. Recycled asphalt paving can used for paved road.

Land Clearing Residuals

Trees and brush—can be recycled as compost or mulch; soil can be reused as fill and cover

Wood Reuse timbers, large dimension lumber, plywood, flooring, molding, lumber longer than 6 feet. Clean, untreated wood can be recycled, re-milled into flooring, or chipped/ground to make engineered board, boiler fuel.

Gypsum Wallboard

Remove and recycle gypsum drywall. Markets include new drywall manufacture, cement manufacture, and agriculture. Unused drywall can be returned to a supplier, donated, or sold.

Buildings Reuse large portions of existing structures during renovation or redevelopment. Extending the life cycle of existing building stock will conserve resources, retain cultural resources, reduce waste, and reduce environmental impacts of new buildings.

Metals

Common metals include steel, aluminum, and copper. Metals are melted down and reformed into metal products.

ConcreteIt is crushed, the reinforcement bar is removed, and the material is screened for size. Market outlets for recycled concrete include road base, general fill, pavement aggregate, and drainage media.

BrickRecycle clean brick by crushing material. Market outlets for recycled brick include aggregate, drainage media, and general fill.

Roofing(non-asphalt shingles) Reuse sheathing, terracotta, slate, or untreated cedar tiles, Metal materials can also be recycled

BENEFITS

• Reduces the production of greenhouse gas emissions and other pollutants by reducing the need to extract raw materials and ship new materials long distances.

• Conserves landfill space, reduces the need for new landfills and their associated cost.

• Saves energy and reduces the environmental impact of producing new materials.

• Creates employment opportunities and economic activities in recycling industries.

• Saves money

BARRIERS IN PROMOTING USE OF RECYCLED MATERIALS

• Lack of appropriately located recycling facilities.

• Absence of appropriate technology.• Lack of awareness .• Poor source separation practices at job

sites

How to get start for it……

• Developing market for recycled products• Public Education, Training and Technical

Assistance• Additional Policy Recommendations• Promoting recycling

CONCLUSION

• In order to reduce the construction waste, during the time of construction order only the correct amount of raw materials.

• As sorting and recycling facilities become more wide spread and better developed it will be easier to redirect our waste from landfill.

To Recycle

The Choice Is Yours…

To Landfill

Reference

• http://www.slideshare.net/kybabita/c-and-d-waste-ppt

• dspace.sngce.ac.in• C and D bronchure pdf net