1. USE OF CONSTRUCTION
AND
DEMOLITION WASTE
BY
BABITHA & YASHODHA
SIETK (puttur)
Email: k.yvbabita@gmail.com

2. Introduction:
Demolition sites & restoration schemes are large amounts of solid waste.
Recycling of concrete & other building materials is difficult &
uneconomical.
It is possible to reuse most of the building materials & components.
As the volume of demolition waste is huge allowing the waste to be
crushed, processed, & reused as aggregate in building works.
The recycling of construction materials like concrete, timber , glass, &
steel is primarily an attempt to reduce the cost of production of new
materials & construction & also reduce the consumption of natural
resources.

3. WHAT IS C & D WASTE?
Renovation Demolition New Construction
40% 50% 10%

4. WHAT DOES C & D WASTE
CONSISTS OF?
Concrete
Brick
Timber
Sanitary ware
Glass
Steel
plastics

5.  CONCRETE:
o Concrete is one of the most important construction material.
o Approximately one ton of concrete is used per capita per year through
out the world.
o Recycling of concrete reduces
• Cost of aggregates
• Disposal costs
• Environmental damage
• Consumption of natural resources &
• Valuable landfill space
o Recycled coarse aggregates may be more durable than virgin material.
o It can also be used in residential construction

6.  BRICK:
o Broken & discarded brick can be used as
construction infill or as aggregate for non-structural
concrete.
o Brick that are part of demolish rubble can be
crushed and used in the same way.
o Brick masonry rubble contains mortar upto
20% by volume.
o Crushed brick & roofing tiles are the bulk of
demolition waste which were earlier being dumped
in landfills, but now they can be recycled into mortar
plaster & building blocks.

7.  TIMBER:
o It is mostly crushed into chip & used as fuel.
o It can also be utilized to manufacture wood-chip
concrete by injecting cement grout into voids of
compacted wood-chips in moulds.
o Wood-chip concrete can be used as building
material.
o This chip can be sawn & nailed as well.
o In Japan alone about 12 million cubic meters
of used timber from demolished houses are used.

8.  SANITARY WARE:
o Sanitary ware includes tiles also.
o There can be reused as it is, if they are not
damaged.
o If sanitary ware are chipped (or) cracked(or)
otherwise damaged are advised to crush and
use them as construction infill (or) as filler in
concrete.
o Pozzolanic value of such crushed & powdered
sanitary ware, is a desirable property in
concrete mixes.

9.  GLASS:
o One ton of recycled waste glass corresponds
to savings in energy equivalent to 125lit of fuel
oil & 1.2tons of raw materials.
o Recycling of glass reduces non-biodegradable
glass out of landfills.
o Glass can be used as substitute for Quartz &
Feldspar in the manufacturing of high strength
procelain sanitary ware.
o It can also be used to make mineral wool- an insulation product & in
granular form as part of the aggregate in concrete mixes.
o In USA an experiment was conducted on metal free-glass constituents
separated from municipal incinerator residue. This glass was used to
produce brick, glass-wool thermal insulation & as a major component
of a light weight aggregate used in structural concrete.

10.  STEEL:
o Steel is most commonly used metal in the world.
o Steel reinforcement from demolished concrete
is usually separated from the rubble on site &
sold scrap to recycling plants.
o The world produces over 783 million tons of
raw steel. It currently recycles over 320 million
tons of iron & steel every year.
o Scrap metal can yield energy savings of upto 76% .
o In Europe steel is most recycled .

11.  PLASTIC:
o There is an over abundance of waste plastic.
o It is very difficult to dispose plastics.
o Waste plastics can be shredded & used as
filler in other materials such as concrete
& also in construction of roads
o House hold plastic waste can also be recycled
to obtain artificial light weight aggregates
for mortar.
o Plastics reduces the possibilities of cracking.

12. Conclusion:
 It has been established that materials & components from
demolished buildings are being reused for new construction works as
well as renovation projects, especially by low- income communities in
developing countries.
 In developing countries most of the demolition rubble is dumped, the
developed world has now started to recycle it into aggregate for non-
structural concrete.
 It is hoped that recycling waste materials for use in the building will
cut down costs of producing new raw materials thereby reducing
consumption of natural resources like energy & reduces usage of
landfills.

13. The iimportant iinitiatives sited are::
1. Promoting separation of C&D waste at source
2. Promoting recycling
3. Ban on llandffilling of C&D waste
4. Developing market for recycled products
5. Production of concrete bricks and paving blocks
6. Guidelines for using C&D waste
7. Developing designs which ffacilitate ‘deconstruction’’
iinstead of outright demolition

14. The Choice Is Yours…
To Landfill To Recycle

15.  REFERENCES:
o Abert, J.G., Resource Recovery Guide, New York: Van Nostrand
Reinhold Co., 1983.
o Akman, M.S., A. Güner, and I.H. Aksoy, "Historical and Technical
Specifications of the Khorasan
o Mortar" (Horasan Harci ve Betonunun Tarihi ve Teknik Özellikleri),
2nd International
o Congress on the History of Science and Technology in Turko-Islamic Era,
ITÜ, Istanbul, 1986.
o Hendriks, Ch.F., 'The Use of Concrete and Masonry Waste as Aggregates
for Concrete Production inthe Netherlands', Environmental Technology:
Proceedings of the 2nd. European Conference in

16. THANK U
ANY QUERIES?