ANNA UNIVERSITY NOTES FOR CIVIL ENGINEERING EVEN SEMESTER CE REPAIR AND REHABILITATION OF STRUCTURES 2. Structures-Lecture-Notes-Shivaram-Edition#.VTO31yGqqko. CE REPAIR AND REHABILITATION OF STRUCTURES. UNIT 1. MAINTENANCE AND REPAIR . Uploaded by.
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CE Repair And Rehabilitation Of Structures Important 16 Mark Questions | JPR Notes
Already Have an Account? Maintenance is the act of keeping something in good condition by checking ce271 repairing it regularly. Repair is the process of restoring something that is damaged or deteriorated or broken, to good condition.
Rehabilitation is the process of returning a building or an area to its previous good conditions.
What are the two facets of maintenance? The two facets of maintenance are i Prevention nottes Repair 5. What are the causes of deterioration? Define physical inspection of damaged structure.
Some of the use full in formation may be obtained from the physical inspection of damaged structure, like nature of distress, type of distress, extent damage and its classification etc, their causes preparing and documenting the damages, collecting the samples for laboratory testing and analysis, planning for in situ testing, special environmental effects which have not been considered at the design stage and information on the loads acting on the existing structure at the time of damage may be, obtained.
To stop further damages, preventive measure necessary may be planned which may warrent urgent execution. How deterioration occurs due to corrosion? Spalling of concrete cover Cracks parallel to the reinforcement Spalling at edges Swelling of concrete Dislocation Internal cracking and reduction in area of steel reinforcement. What are the steps in selecting a repair procedure? Discuss about the environment effects which leads to deterioration of concrete structure.
Micro-cracks present in the concrete are the sources of ingress of moistures atmospheric carbon di-oxide into the concrete which attack reinforcement and with various ingredients of concrete. In aggressive environme4nt concrete structure will be severely reduces. What is the effect of selecting poor quality material for construction?
Quality of materials, to be used in construction, should be ensured by means various tests as specified in the IS codes. Alkali-aggregate reaction and sulphate attack results in early deterioration. Clayey materials in the fine aggregates weaken the mortar aggregate bond and reduce the strength. Salinity causes corrosion of reinforcing bars as well as deterioration of concrete. How can we determine the cause for deterioration of concrete structure?
What are the factors to be considered by the designer at the construction site. What are the steps in repair aspect? Define the fixed percentage method of evaluating the strength of existing structure. Discuss about the design and construction errors leading to deterioration of a structure.
Design of concrete structures governs the performance of concrete structures. Well designed and detailed concrete structure will show less deterioration in comparison with poorly designed and detailed concrete, in the similar condition. The beam-column joints are particularly prone to defective concrete, if detailing and placing of reinforcement is not done properly.
Inadequate concrete cover may lead to carbonation depth reaching up to the reinforcement, thus, increasing the risk of corrosion of the reinforcement. Discuss about the quality of supervision to be followed at a site. Construction work should be carried out as per the laid down specification. Adherence to specified water-cement ratio controls strength, permeability durability of concrete.
Insufficient vibration may result in porous and honey combined concrete, whereas excess vibration may cause segregation.
What are the possible decisions that can be made after evaluating the strength of a structure?
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