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Note of Repair and Rehabilitation of buildings by Karthik M P

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19-05-2017  Petty repairs, replacements and structural repairs of buildings, white and color washing, distempering and painting at prescribed intervals  Repair and renewal of furniture  Operation, periodical maintenance, repairs renewals of machinery and equipment for electric etc  Repair of roads, culvets and resurfacing the roads  Maintenance Engineering is defined as the work done to keep the civil Engineering structures and work in conditions so as to enable them to carry out the functions for which they are constructed.  It is preventive in nature. Activities include inspection and works, necessary to fulfill the intended function, or to sustain original standard of service. Aims of Maintenance work classified as  The avoidance of accidents, which may harm people or plant  The continued operation of a facility  The protection of the capital investment in the asset Maintenance work is classified as  Preventive maintenance  Remedial maintenance  Routine maintenance  Special maintenance 1

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19-05-2017  Finding the deterioration  Determining the clause  Evaluating the strength of the existing structures  Evaluating the need of the structures  Selecting and implanting the repair procedure  Improves the life of structure life period gives better return on investment  Better appearance and aesthetically appealing  Leads to quicker detection of defects and hence remedial measures  Prevents major deterioration that leads to collapse  Ensures safely to occupants  Ensures feeling of confidence by the user  Improved Routine maintenance  It is the service maintenance attended to the structure periodically. It is depends upon specifications and materials of structure, purpose, intensity and condition of use. Special maintenance  It is the work done under special condition and requires sanction and performed to rectify heavy damage.  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 2

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19-05-2017 Weekly Routine Maintenance    Electrical Accessories Flushing sewer line Leakage of water line Monthly Routine Maintenance     Cleaning Doors, windows, etc Checking Septic Tank/Sewer Observation for cracks in the elements Cleaning of overhead tanks Yearly Routine Maintenance Attending to small repairs and white washing Painting of steel components exposed to weather  Check of displacements and remedial measures   The causes which necessitate maintenance effects the service durability of the structure as follows:  Atmospheric Agencis  Normal wear and tear  Failure of structure the and  A. Inspection  Collect data at specified intervals in specified form B. Analysis    Add latest information to database Examine progression of defects Relate defects to action criteria C. Action possibilities      Note and wait for the next inspection Alter inspection frequency Institute repairs Further detailed investigation Put safety procedures in place Rain: It is the important source of water which affects the structure in the following ways: Expansion And contraction  The material is subjected to repetitive expansion and contraction while they become wet and dry and develops the stresses  Dissolving and carrying away minerals as it is universal solvent 3

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19-05-2017 The water available in nature contains acids and alkali and other compound in dissolved form acts over the material to give rise, which is known as chemical weathering. Wind:  It is the agent, which transports the abrasive material and assists the physical weathering.  Temperature: The diurnal, seasonal and annual variation of the temperature, difference in temperature it causes expansion and contraction.   During the use of structure it is subjected to abrasion and thereby it looses appearance and serviceability Failure of structure  Improper design- Due to incorrect, insufficient data regarding use, loading and environmental conditions, selection of material and poor detailing.  Defective construction-poor materials, poor workmanship, lack of quality control and supervision.  Improper use of structure- overloading, selecting the structure for the use they not designed impurities from industrial fuel burning, sea water minerals etc. Pre-monsoon period Monsoon period  Post-monsoon period    To decide the maintenance programmer to be done before monsoon such as cleaning of drains, checking of roof leakage, collection material etc  It is needless to mention that the emergency work carried out in monsoon period. e.g: railway tracks, collapse of roof etc.  It is made to repair the damage caused by water and draw up the programme of repair according to the priorities. Design for maintainability Preventive maintenance  Predictive maintenance  Reliability centered maintenance  Reactive maintenance  Spares management  Maintenance logistics support  Total productive maintenance  Organizing for maintenance  Computerized maintenance management program  Statutory requirements   4

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