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RamanuJ Jaldhari
Asst. Professor
KITE, Jaipur
DETERIORATION OF CONCRETE
CRACKS
RISK ASSESSMENT
REPAIR MATERIAL
REPAIR TECHNIQUES
CASE STUDIES
Sunder Nursery, New Delhi
INTRODUCTION
REPAIR
• Repair is the process of restoring something is damaged or
deteriorated or broken, to good condition
• It refers to the modification of a structure, partly or wholly ,
which is damaged in appearance or serviceability.
• To restore by replacing a part or putting together what is torn
or broken.
REHABILITATION
• It is the process of restoring the structure to service level, once
it had and now lost.
• Strengthening consists in endowing the structure with a service
level, higher than that initially planned by modifying the structure
not necessarily damaged area
• Rehabilitation is theprocess of returning a building or an area to
its previous good conditions.
MAINTENANCE
• It is the act of maintaining the building in its serviceable
condition by checking or repairing it regularly
• It is defined as the work done to keep the Civil Engineering
structures and work in a condition so as to enable them to carry out
the functions for which they are constructed. The maintenance of
structure is done to meet the following objectives
 Prevention of damages due to natural agencies and to keep them
in a good appearance and working condition
 Repair of the defects occurred in the structure and strengthen
them, if necessary
Maintenance operations have many facets such as
• Emergency Maintenance: For unforeseen breakdown
drainage or damage caused by natural calamity like fire, floods,
cyclone earthquake etc.
• Fixed Time Maintenance: Activities repeated at
predetermined intervals of time.
• Preventive Maintenance: This is intended to preserve by
preventing failure and detecting incipient faults ( Work is done
before failure takes place)
• Opportunity Maintenance: Work did as and when possible
within the limits of operation demand.
• Shut down Maintenance: Thorough overhaul and
maintenance after closing a facility.
Preventive Maintenance
Remedial Maintenance
•Finding the deterioration
•Determining the causes
•Evaluating the strength of the existing structures
•Evaluating the need of the structure
•Selecting and implementing the repair procedure
Routine Maintenance
Special Maintenance
The following are the various maintenance aspects,
Daily Routine Maintenance
Weekly Routine Maintenance
Monthly Routine Maintenance
Yearly Routine Maintenance
Basically an inspection oriented and may not contain action
to be taken
• Help in identifying major changes, development of cracks,
identifying new cracks etc
• Inspection of all essential items by visual observation
• Check on proper function of sewer, water lines, wash
basins, sinks etc
• Check on drain pipes from roof during rainy season.
• Electrical accessories
• Cob webs cleaning
• Flushing sewer line
• Leakage of water line
• Cleaning doors, windows etc
• Checking septic tank/sewer
• Observation for cracks in the elements
• Cleaning of overhead tanks
• Peeling of plaster, dampness, floor cracks
•Attending to small repairs and while washing
•Painting of steel components exposed to weather
•Check of displacements and remedial measures
1) INSPECTION
Collect data at specified intervals in specified form
2) ANALYSIS
i)Add latest information to database which contains
all earlier information
ii) Examine progression of defects
iii) Relate defects to action criteria
3) ACTION POSSIBILITIES
i) Note and wait for the next inspection
ii) Alter inspection frequency
iii) Institute repairs
iv) Further detailed investigation
v) Put safety procedures in place
Any Query???

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Repair & Rehabilitation of Structures

  • 9. REPAIR • Repair is the process of restoring something is damaged or deteriorated or broken, to good condition • It refers to the modification of a structure, partly or wholly , which is damaged in appearance or serviceability. • To restore by replacing a part or putting together what is torn or broken.
  • 10. REHABILITATION • It is the process of restoring the structure to service level, once it had and now lost. • Strengthening consists in endowing the structure with a service level, higher than that initially planned by modifying the structure not necessarily damaged area • Rehabilitation is theprocess of returning a building or an area to its previous good conditions.
  • 11. MAINTENANCE • It is the act of maintaining the building in its serviceable condition by checking or repairing it regularly • It is defined as the work done to keep the Civil Engineering structures and work in a condition so as to enable them to carry out the functions for which they are constructed. The maintenance of structure is done to meet the following objectives  Prevention of damages due to natural agencies and to keep them in a good appearance and working condition  Repair of the defects occurred in the structure and strengthen them, if necessary
  • 12.
  • 13. Maintenance operations have many facets such as • Emergency Maintenance: For unforeseen breakdown drainage or damage caused by natural calamity like fire, floods, cyclone earthquake etc. • Fixed Time Maintenance: Activities repeated at predetermined intervals of time. • Preventive Maintenance: This is intended to preserve by preventing failure and detecting incipient faults ( Work is done before failure takes place) • Opportunity Maintenance: Work did as and when possible within the limits of operation demand. • Shut down Maintenance: Thorough overhaul and maintenance after closing a facility.
  • 14. Preventive Maintenance Remedial Maintenance •Finding the deterioration •Determining the causes •Evaluating the strength of the existing structures •Evaluating the need of the structure •Selecting and implementing the repair procedure Routine Maintenance Special Maintenance
  • 15. The following are the various maintenance aspects, Daily Routine Maintenance Weekly Routine Maintenance Monthly Routine Maintenance Yearly Routine Maintenance
  • 16. Basically an inspection oriented and may not contain action to be taken • Help in identifying major changes, development of cracks, identifying new cracks etc • Inspection of all essential items by visual observation • Check on proper function of sewer, water lines, wash basins, sinks etc • Check on drain pipes from roof during rainy season.
  • 17. • Electrical accessories • Cob webs cleaning • Flushing sewer line • Leakage of water line
  • 18. • Cleaning doors, windows etc • Checking septic tank/sewer • Observation for cracks in the elements • Cleaning of overhead tanks • Peeling of plaster, dampness, floor cracks
  • 19. •Attending to small repairs and while washing •Painting of steel components exposed to weather •Check of displacements and remedial measures
  • 20. 1) INSPECTION Collect data at specified intervals in specified form 2) ANALYSIS i)Add latest information to database which contains all earlier information ii) Examine progression of defects iii) Relate defects to action criteria
  • 21. 3) ACTION POSSIBILITIES i) Note and wait for the next inspection ii) Alter inspection frequency iii) Institute repairs iv) Further detailed investigation v) Put safety procedures in place