Vishnu, Yasir, Manasi, Ashhar - Materials and Methods for Conservation Work Recycling of Old Buildings

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



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,





The demolition of one

house can create asmuch as 50-100 tons of

waste



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)



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



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





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



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).



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



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



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.



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.



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.



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



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



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,



ON-SITE

moving large unused cut-off

pieces to another project site

Reuse appliance boxes for other work

Use the material in forecasted

measure



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



REC Y CLINGMETHODS

mixed material collection.

source separation.

time-based separation.



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



Disadvantage

Extra cost to have the recycling

service



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.



advantage

obtain the best market value

No further separation is required

by the

reduced cost. cleaner



disadvantages

additional work required to

separate the materials

programs can be difficult to

maintain if all the workers are notproperly trained.



Time-Based Separation

time-based separation programs

pick out the materials they want

and actually do some pre-

processing on-site in time based



advantage

they do not require all of the

separate container



disadvantage

they often require more room on

the site for storage of materials

and processing equipment



TIPS FORCHOOSING

TARGET SALVAGE

MATERIALS AND

REC Y CLABLES



Wood difficult to recycle because of

coatings.

Clean timbers the best recyclingcandidates.

reused in new construction topreserve some of the style of theold building.



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.



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.



Brick:

Bricks can be cleaned and

salvaged.

Good markets for bricks

Broken bricks can be crushed foruse as aggregate.



Glass:

Plate glass and glass from light

bulbs are difficult to market.

windows and mirrors can often be

salvaged.





Carpet: Carpet in good condition can be

salvaged and resold.

Carpet padding can be recycled.



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.

Vishnu, Yasir, Manasi, Ashhar - Materials and Methods for Conservation Work Recycling of Old Buildings

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