repair and rehabilitation of historical structures

REPAIR RETROFITTING REHABILITATION

REPAIR & REHABILITATION OFHISTORICAL STRUCTURESBy:CIVIL SCHOLARwww.civilscholar.com

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Outlinewww.civilscholar.com

Causes of deterioration:Many structures may need repair and rehabilitation for one of the following reasons :-

Deterioration due to environmental effect

2. New functional or loading requirements

3. Damage due to Accidents

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Charminar- Apr 30,2010Great wall of china- Xishuiyu Section- June 2015www.civilscholar.com

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Procedure:The basic process flow employed in repair and rehabilitation includes:www.civilscholar.com

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Identification of BuildingData collection (Preliminary survey and tests)


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Identification of BuildingData collection (Preliminary survey and tests)


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STRUCTURAL CRACKS:

1. Epoxy injection

2. Polyurethane injection

3. Stitching of cracks

Problem IdentificationSelection of suitable solution


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EPOXY INJECTION

60002C Epoxy Injection PumpEpoxy grout consists of epoxy resin, epoxy hardener and sand/aggregates.

Epoxy grout is non-porous and wouldnt absorb any contaminant or stains.


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STRUCTURAL CRACKS:

Epoxy injection

3. Stitching of cracks


2. Polyurethane Injectionwww.civilscholar.com

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POLYURETHANE INJECTION

Installed Injection PackerPolyurethane Crack Injection Polyurethane injection involves a high pressure (typically 1500-3200 psi) injection of activated polyurethane through injection packers hammered into drilled holes.

These fast-setting foams are effective alternatives for applications involving only crack sealing (waterproofing) and not structural repair.


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STRUCTURAL CRACKS:

Epoxy injection

Polyurethane Injection


3. Stitching of crackswww.civilscholar.com

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STITCHING OF CRACKS


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ROOF LEAKAGES

Replacement of damaged roof with new clay roof tile and rearrangement of sealant.

Replacement of damaged roof portion by Asbestos roof and refill of sealant

Lead flashing



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Peeling of walls and ceilingThe most suited and effective solution for peeling of walls or plaster is Mughal Plastering i.e. Plastering with lime mortar. Its lifetime is 10 years.Mold stainsThe effective solution is applying soap water under high pressure using pressure nozzle, controller and tube.Vegetation growthThe materials used to remove vegetation growth are Glyphosate, ammonia solution and lime mortar.

Maluti temples, Dumka District, JharkhandProblem IdentificationSelection of suitable solution


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Measures:

The Archaeological Survey of India (ASI), is the premier organization for the archaeological researches and protection of the cultural heritage of the nation.

For the maintenance of ancient monuments and archaeological sites and remains of national importance the entire country is divided into 24 Circles.www.civilscholar.com

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Measures:(Air Pollution)

The Archaeological Survey of India (ASI) and Central Pollution Control Board (CPCB) are continuously monitoring ambient air quality in 254 cities / towns in the country including vulnerable monuments.

Implementation of Bharat Stage IV (BS IV) norms in 63 selected cities and universalization of BS IV by 2017.

As stated by Shri Prakash Javadekar, Minister of state for Environment, Forest and Climate Change -May2016www.civilscholar.com

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Measures:

Decision taken to leapfrog directly from Bharat Stage IV to BS-VI fuel standards by 1st April, 2020;

As stated by Shri Prakash Javadekar, Minister of state for Environment, Forest and Climate Change -May2016www.civilscholar.com

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References:S Raja Subramaniam (2016). A Review on repair and rehabilitation of heritage buildings. International Research Journal of Engineering and Technology (IRJET), Volume 3, issue 4 | Apr-2016.

N. Venkat Rao, M. Rajasekhar, Dr. G. Chinna Rao (2014). Detrimental effect of Air pollution, Corrosion on Building Materials and Historical Structures. American Journal of Engineering Research (AJER)- pp-359-364.CPWD handbook of conservation of heritage buildings

www.buildingconservation.comwww.thehindu.comwww.hansindia.comwww.helifix.com


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THANK YOUwww.civilscholar.comWWW.CIVILSCHOLAR.COM

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