Civil engineering

1. Name : N.Dhamothiran
Roll No : 22LBECE016
RECYCLING AND REUSE OF
BUILDING WASTE IN
CONSTRUCTION

2. • 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.
INTRODUCTION

3. 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.

4. 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

5. 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,

6. 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

7. COMMANLY RECOVERED CONSTRUCTION
MATERIALS
• Asphalt Paving
• Land Clearing Residuals
• Wood
• Gypsum Wallboard
• Buildings
• Metals
• Concrete
• Roofing(non-asphalt shingles)
• Brick

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

9. Land Clearing Residuals
Trees and brush—can be recycled as
compost or mulch; soil can be reused as fill
and cover

10. 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.

11. 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.

12. 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.

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

14. Concrete
It 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.

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

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

17. 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.

18. • Saves energy and reduces the
environmental impact of producing new
materials.
• Creates employment opportunities and
economic activities in recycling
industries.
• Saves money

19. 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

20. How to get start for it……
• Developing market for recycled products
• Public Education, Training and Technical
Assistance
• Additional Policy Recommendations
• Promoting recycling

21. 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.

22. THANKYOU