PRESENTATION BY

R.RAGHAVENDRAI/II M.Tech, CTM

CONTENTS :1. SALIENT FEATURES2. GLANCE ON BUILDING PICTURES3. OBSERVATIONS4. Reasons5. tests to be recommended 6. Suggested methods7. conclusion

Quarters located at KAZIPET Railway station

G + 2 Building with 4 Flats at each level

Constructed Building more than 30 years ago

All flats are occupied

Date of inspection: 30-03-2013

Salient Features:

ELEVATION REENTRANT CRACKS

VERTICAL & DIAGONAL CRACKS

CORROSION OF RIENFORCEMENT

LINTEL FAILURE

CRACK IN THE FLOORCRACK IN THE WALL

WATER LEAKAGE FROM DRAINAGE PIPES

PLANTGROWTH

NEW WATER TANK

DEMOLISHED OLD WATER TANK (expected)

DAMPNESS

SPALLING FROM SLAB

VISUAL OBSERVATIONS:

Structural cracks are observed in walls

Spalling & Peeling of cover

Corrosion of Reinforcement

Settlement of the floor

Plant & Algae growth

Severe Dampness in the walls

Discolouration of the building

REASONS: Major cracks in compound wall due to differential

settlement of the foundation

Reentrant cracks due to Stress concentration

Spalling & Peeling of cover

Corrosion of bars due to seepage of water

Settlement of the floor due to poor soil conditions

Plant & Algae growth due to leakage of water from pipes

Dampness in the walls due penetration of water from tank

Poor Maintenance & No repair at initial stages of damage

Tests to be Recommended:

Ultrasonic Pulse Velocity test

Half-cell Potential test

Rebound Hammer Test

Carbonation test

Resistivity test

Suggested Repair

Techniques:

o Cracks: Stiching Method

o Spalling & Peeling: Bond coats & Grouts

o Corrosion: Proper cover & coating

o Dampness: Thin Polymer & Epoxy overlays

o Settlement of floor: Proper Soil Compaction

o Plant & Algae Growth: New Drainage pipes

Conclusion:

As Many parts of the building are damaged immediately

repair has to be done.

The Repair Techniques improve the remaining life of

the structure up to a considerable extent.

Hence This Moderately damaged building has to be

tested in detail and appropriate methods are to be

applied.

Periodic inspection & Maintenance

R.RAGHAVENDRA

THANK YOU