Post on 07-Apr-2018
8/6/2019 Vishnu, Yasir, Manasi, Ashhar - Materials and Methods for Conservation Work Recycling of Old Buildings
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8/6/2019 Vishnu, Yasir, Manasi, Ashhar - Materials and Methods for Conservation Work Recycling of Old Buildings
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GUIDED BY GUIDED BY
Mr.Mr. RAHMATHULLARAHMATHULLA
NOUFALNOUFAL
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CONSTRUCTION ANDCONSTRUCTION AND
DEMOLITIONDEMOLITION
WASTE WASTE
Construction andConstruction and
demolition waste isdemolition waste isgenerated whenever any generated whenever any
construction/demolitionconstruction/demolition
activity takes place,activity takes place,
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The demolition of one
house can create asmuch as 50-100 tons of
waste
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Cement concreteCement concrete
BricksBricks
Cement plasterCement plaster
Steel (from RCC, door/windowSteel (from RCC, door/windowframes, roofing support, railingsframes, roofing support, railingsof staircase etc.)of staircase etc.)
RubbleRubble
Stone (marble, granite, sand stone)Stone (marble, granite, sand stone)
Timber/wood (especially Timber/wood (especially demolition of old buildings)demolition of old buildings)
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STORAGE OFSTORAGE OF
CONSTRUCTION ANDCONSTRUCTION AND
DEMOLITION WASTEDEMOLITION WASTE
stored within the site itselfstored within the site itself
Provide screen avoid scatteringProvide screen avoid scattering
segregated into different heaps as far assegregated into different heaps as far aspossible so that further gradation andpossible so that further gradation andreuse is facilitated.reuse is facilitated.
·· Material can be reused at the same siteMaterial can be reused at the same sitefor construction leveling, makingfor construction leveling, makingroad/pavement or land filling.road/pavement or land filling.
·· The local body or a private company may The local body or a private company may arrange to provide appropriate furtherarrange to provide appropriate further
work work
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COLLECTION ANDCOLLECTION AND
TRANSPORTATIONTRANSPORTATION
If it is stored in skips, thenskip lifters fittedhydraulic hoist system
where used for efficientand prompt removal.
Trailers, tractor front-
end loaders incombination with sturdy tipper trucks where used
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REC Y CLINGAND REUSEREC Y CLINGAND REUSE
Reuse (at site) of bricks, stone slabs, timber,Reuse (at site) of bricks, stone slabs, timber,conduits, piping railings etc. to the extentconduits, piping railings etc. to the extentpossible and depending upon their condition.possible and depending upon their condition.
Sale / auction of material which can not beSale / auction of material which can not beused at the site due to design constraint orused at the site due to design constraint or
change in design.change in design. Plastics, broken glass, scrap metal etc. canPlastics, broken glass, scrap metal etc. can
be used by recycling industries.be used by recycling industries.
Rubble, brick bats, broken plaster/concreteRubble, brick bats, broken plaster/concretepieces etc. can be used for building activity,pieces etc. can be used for building activity,such as, leveling, under coat of lanes wheresuch as, leveling, under coat of lanes wherethe traffic does not constitute of heavy the traffic does not constitute of heavy
moving loads.moving loads. Larger unusable pieces can be sent for fillingLarger unusable pieces can be sent for filling
up lowup low--lying areas.lying areas.
Fine material, such as, sand, dust etc. can beFine material, such as, sand, dust etc. can beused as cover material over sanitary landfillused as cover material over sanitary landfill
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DISPOSALDISPOSAL
Being predominantly inert inBeing predominantly inert in
nature, construction andnature, construction and
demolition wastedemolition waste
does not create chemical ordoes not create chemical or
biochemical pollution. Hencebiochemical pollution. Hence
maximum effort shouldmaximum effort should
be made to reuse and recyclebe made to reuse and recycle
them as indicated above (4.5).them as indicated above (4.5).
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PLANNINGANDPLANNINGAND
MANAGEMENT ASPECTSMANAGEMENT ASPECTS
The concerned civic authoritiesThe concerned civic authoritiesshould make a plan for gainful useshould make a plan for gainful useof construction debris.of construction debris.
The low lying areas, which need toThe low lying areas, which need to
be filled up for the purpose ofbe filled up for the purpose ofbuilding activity, may be mapped andbuilding activity, may be mapped anda contingency plan prepared soa contingency plan prepared so
that whenever a demolition orthat whenever a demolition orconstruction activity takes place,construction activity takes place,its debris can beits debris can be
directed to such places in orderdirected to such places in orderof priority. However, such activity of priority. However, such activity should beshould be
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INSTITUTIONAL ANDINSTITUTIONAL AND
REGULATORY ASPECTSREGULATORY ASPECTS
1. The total activity may be contracted1. The total activity may be contractedout.out.
2. Only vehicles may be leased out by the2. Only vehicles may be leased out by thecivic body to the private contractorcivic body to the private contractor
for transport of debris with his ownfor transport of debris with his own
labour, i.e., labour contract.labour, i.e., labour contract. 3. The vehicles may be hired by the local3. The vehicles may be hired by the local
body from private sources forbody from private sources for
transport of debris with municipaltransport of debris with municipallabour.labour.
4. The total activity may be carried out by 4. The total activity may be carried out by
the Department, i.e., the municipality the Department, i.e., the municipality
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REC Y CLINGPROGRAM
LIMITATIONS
Large Projects:
Although large projects have an
advantage they create a large
quantity of recyclable materials
Disadvantage in that there aremore waste generators to manage.
Large projects definitely require a
designated person(s) to overseethe recycling and waste reductionprograms.
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Small Projects: do not generate enough
recyclable material
It consider either transporting
recyclable materials t to drop-
off location.
Small project contractors
should work with their recycling
service providers.
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CommercialConstruction
Projects
cranable containers can be used
at various levels of the projectand emptied
into a central container
provide extra storage space for
recycling containers.
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Limitations
storage space restrictions onsite
language barriers with workers
poor access from point of
generation to recycling yards material separation to the target
excessive dust and noise
generation
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TIPS FOR WASTE
REDUCTION AND REUSE:
DESIGN STAGE
Favor designs using standard sizes
Evaluate plans in relation to
efficiency of materials Use. Review floor plans to optimize use
of subflooring and sheathing.
Specify building techniques that
incorporate less materials
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PURCHASINGSTAGE
Make sure the correct amount of
materials is brought to the site
Work with suppliers to reduce
packaging waste Ask suppliers to take back
substandard, rejected items.
Purchase good-quality,
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ON-SITE
moving large unused cut-off
pieces to another project site
Reuse appliance boxes for other work
Use the material in forecasted
measure
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TIPS FOR
REMODELERS:
Appliances:
Store for reuse on project,donate or sell usable units;recycle unusable units.
Cabinets Store reusable doors,drawers
and trim for reuse or recycle
Doors:
reuse or recycle .
Electrical: Give scrap wire to electrician,
recycle the other
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REC Y CLINGMETHODS
mixed material collection.
source separation.
time-based separation.
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Mixed Material
Collection
recycling service providercollects target recyclablematerials in a mixed load.
advantages
many separate collectioncontainers are not needed
No extra labor required toseparate materials. In addition
Educate all of the workers on the
site about proper participation inthe program
less time is needed to monitor theirperformance
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Disadvantage
Extra cost to have the recycling
service
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Source Separation
Each target recyclable material isseparated from the waste stream
its own container for collectionby a recycling
It requires at least one separatecontainer for each targetmaterial at the site.
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advantage
obtain the best market value
No further separation is required
by the
reduced cost. cleaner
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disadvantages
additional work required to
separate the materials
programs can be difficult to
maintain if all the workers are notproperly trained.
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Time-Based Separation
time-based separation programs
pick out the materials they want
and actually do some pre-
processing on-site in time based
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advantage
they do not require all of the
separate container
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disadvantage
they often require more room on
the site for storage of materials
and processing equipment
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TIPS FORCHOOSING
TARGET SALVAGE
MATERIALS AND
REC Y CLABLES
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Wood difficult to recycle because of
coatings.
Clean timbers the best recyclingcandidates.
reused in new construction topreserve some of the style of theold building.
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Concrete:
Concrete is almost alwaysrecyclable from demolition waste
. For large concrete structures,
portable crushers can be broughton-site and concrete can becrushed into aggregate for use asbackfill.
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Metals: All metals are recyclable,
especially if they are clean.
Aluminum siding may be difficult torecycle depending on its
condition. More valuable metals, copper, brass, and stainless steel,
should be stripped out prior todemolition.
Metal trim work and ceilings have
a good market value whensalvaged.
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Brick:
Bricks can be cleaned and
salvaged.
Good markets for bricks
Broken bricks can be crushed foruse as aggregate.
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Glass:
Plate glass and glass from light
bulbs are difficult to market.
windows and mirrors can often be
salvaged.
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Carpet: Carpet in good condition can be
salvaged and resold.
Carpet padding can be recycled.
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Fixtures: Sinks, bathtubs, tiles, bath
fixtures, and other fixtures can besalvaged and resold or
use in new construction or
renovations. Broken pieces of ceramics can be
recycled with rubble to formaggregate for roadbase and fillmaterial.