CE-803-C Retrofitting and Rehabilitation of Structures - Nov 2023 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 7 Marks
   aDescribe any two methods of corrosion protection.
   How to answer

   • Define corrosion protection and its need in RC structures
   • Describe any two methods e.g. coating, cathodic protection, galvanizing with mechanism
   • Steps of application and suitability
   • Advantages and limitations
2. 7 Marks
   bDescribe about corrosion inhibitors and corrosion resistant steel.
   How to answer

   • Define corrosion inhibitors - types anodic, cathodic, mixed
   • Mechanism of inhibition in concrete
   • Define corrosion resistant steel - composition and properties
   • Applications and comparison
3. 7 Marks
   aWrite the causes for deterioration of steel.
   How to answer

   • Define deterioration of steel
   • List causes - corrosion, fatigue, fire, chemical attack
   • Explain electrochemical and environmental factors
   • Effect on strength and serviceability
4. 7 Marks
   bWrite in detail about surface deterioration of concrete and its preventive measures.
   How to answer

   • Define surface deterioration of concrete - scaling, spalling, crazing, efflorescence
   • Causes - chemical, physical, environmental
   • Preventive measures - mix design, curing, coatings
   • Maintenance practices
5. 7 Marks
   aWrite about demolition of structures using engineered technique.
   How to answer

   • Define demolition and need for engineered technique
   • Steps - survey, planning, sequencing, safety
   • Engineered methods - controlled blasting, mechanical, deconstruction
   • Safety and environmental controls
6. 7 Marks
   bExplain any two types of Non-Destructive tests.
   How to answer

   • Define Non-Destructive Testing and purpose
   • Explain any two tests e.g. rebound hammer, UPV, half-cell, core
   • Principle, procedure and interpretation
   • Applications and limitations
7. 7 Marks
   aExplain in detail about surface repair and retrofitting techniques.
   How to answer

   • Define surface repair and retrofitting
   • Surface preparation methods
   • Repair materials and techniques - patching, overlays, grouting
   • Retrofitting procedures and quality control
8. 7 Marks
   bDescribe about diagnosis of construction failures.
   How to answer

   • Define construction failure and need for diagnosis
   • Steps of investigation - visual, NDT, load history
   • Identification of causes - design, material, workmanship
   • Reporting and remedial recommendations
9. 7 Marks
   aDescribe about different types of cracking in structures.
   How to answer

   • Define cracking in structures
   • Types - flexural, shear, shrinkage, thermal, corrosion induced
   • Causes and characteristic patterns
   • Significance for durability
10. 7 Marks
    bWrite about damage under accidental and cyclic load.
    How to answer

    • Define accidental load - impact, blast, fire
    • Define cyclic load - fatigue, seismic reversals
    • Damage mechanisms under each
    • Design and mitigation considerations
11. 7 Marks
    aExplain in detail about Strengthening of Beams with Jacketing Technique.
    How to answer

    • Define jacketing for beams - purpose
    • Materials - concrete, steel, FRP jacketing
    • Procedure - surface prep, reinforcement, concreting
    • Design considerations and advantages
12. 7 Marks
    bWhat is the role of NDT in qualifying the structure after retro fitting?
    How to answer

    • Define NDT and retrofitting qualification
    • Role in verifying effectiveness of retrofit
    • Tests used before and after retrofitting
    • Acceptance criteria and documentation
13. 7 Marks
    aExplain in detail about shear transfer strengthening.
    How to answer

    • Define shear transfer and its importance
    • Methods of shear transfer strengthening - shear connectors, dowels
    • Procedure and materials used
    • Applications in rehabilitation
14. 7 Marks
    bWhat do you understand by seismic rehabilitation of existing buildings?
    How to answer

    • Define seismic rehabilitation - need for existing buildings
    • Objectives - life safety, performance levels
    • Methods - jacketing, bracing, base isolation, FRP
    • Codal provisions and assessment
15. 14 Marks
    Explain in detail about

    1. a)Crack Stabilization
    2. b)Moisture effect on concrete building
    How to answer

    • Define crack stabilization - objectives and methods like stitching, grouting
    • Explain moisture effects - seepage, corrosion, strength loss
    • Preventive and remedial measures
    • Materials and maintenance for durability