CONSTRUCTION WASTE. DEMOLITION WASTE. RECYCLE OF CONSTRUCTION WASTE. SUSTAINABLE. B.TECH PRESENTATION. B.TECH PROJECT.

1. Construction and
Demolition Waste
Management
A step towards better environment..

2. Introduction
Construction and demolition waste is generated
whenever any construction/demolition activity
takes place, such as, building roads, bridges,
flyover, subway, remodelling etc.We all must have
seen debris lying near the roads, at corners of
streets, and sometimes a huge stack at dumping
area.

3. What happens to these
waste?
Do they decompose?
How efficiently are they
disposed?

4. Dumped! Just dumped.
Most of the C & D waste(Construction and demolition)
waste are dumped without any treatment. Moreover they
are also used for landfills.
This unplanned dumping of C&D waste is creating
problems like Choking of Rivers, Soil erosion, destroying
water supply etc. Also it is a loss to economy as it can be
recycled and refused.

5. When generated
CnD wastes are produced at multi level
on different scales -
➔ Renovation
➔ Construction
➔ Demolition
Around 40% waste are from renovation,
50% from demolition and 10% during
construction

6. What they comprise of?
CnD waste comprise of following materials:
➔ Brick
➔ Concrete
➔ Sanitary ware
➔ Glass
➔ Steel
➔ Plastic

7. Brick
● Crushed bricks and roofing tiles are the bulk of
demolition waste which were earlier being used
in landfills but now they can be recycled into
mortar plaster and building blocks.
● Broken/Discarded bricks can also be
used for non structural concrete.

8. Concrete
● It is the second most consumed amterial on
eartg after Water. (Around 500kg worldwide
and 200kg in India per capita)
● Thus concrete is major part of CnD waste

9. Glass, Steel, and Plastic
● These materials can be recycled and not only reduces
Non degradable materials out of landfills but also
corresponds to save in energy.

10. C&D Treatment Plant
India’s first C&D recycling plant
established in 7Acre land of
Burari(Jahangirpuri).

11. Flow Processes in
Recycling Plant

12. Collecting Waste Material
• Collection also done by the Municipal
Corporation and brought to the processing
plant
• Large generators, such as, DMRC, PWD
etc. also truck their bulk C&D waste material
to this plant
• Tipper trucks are the most common
vehicles of transport
• Incoming material subjected to inspection
and computerized weighment
.

13. ● C&D waste dumped at the
tipping floor
● Segregation of undesirable
items like rags, plastics,
metal, FRP sheets etc. with
mechanical (JCB) and
manual means
● Remaining waste segregate
into 3 parts:
– Whole bricks
– Big pieces of concrete
– Mixed C&D waste

14. ● Large concrete pieces are
broken using rock breaker and
mechanical hammer (200-400
mm size)
● Fed into horizontal impact
crusher
● Screening of the crushed
material
● Moulded bricks (cold) made
from mixed aggregate and
cement using brick laying
machine

15. • The mixed material passed
through a jaw crusher to reduce
size to 60 mm and less
• Fed into wet processor
• Washed material size graded
into different fractions -
from 60mm to 75μ size
Wet process at Burari plant

16. Recycled C&D waste products

17. Concrete
● Grades upto M15 can be manufactured depending
upon the quality of waste provided
and processing.
● These concrete can be used in
various construction places like
Pavements, Partition walls,
Designer tiles etc.
● Now-a-days they are used in
residential construction.

18. Aggregates
● Recycled aggregates are the major product of C&D
Plant.
● Aggregates of various sizes are
prepared which posses strength
not less than virgin aggregates.
● Thus, they are used in construction
of both load bearing and non load
Bearing structures.

20. Milestones
1945 2013
1945
First demolition waste
plant established in
Germany.
2009
First demolition plant
established in India in
Jahangirpuri.
2013
Another Demolition plant
established in Seelampur.

21. Future of C&D waste plants!
This is the need of hour to establish
more C&D waste plants in different
parts of country. This will not only
reduces the waste but also more
energy and money can be saved.