Repairs & Rehabilitation of Concrete — Winter 2021

List and explain in brief various construction errors leading to crack formation and deterioration of concrete.

Distinguish between Rehabilitation and Retrofitting with examples.

What are the main objectives of condition assessment of structures? Explain various stages of condition survey in detail.

Define the terms Thermal Conductivity, Thermal Diffusivity and Coefficient of Thermal Expansion with reference to concrete.

What do you understand by durability of concrete? Enlist the factors affecting durability.

Explain corrosion mechanism of steel in RCC. List various techniques of corrosion mitigation for RCC.

What do you mean by jacketing? Explain jacketing of column with sketches.

Explain importance of cover in RCC structures.

Write short note on Expansive cement.

List out various Non Destructive tests used to determine strength of existing structures. Explain Ultrasonic Pulse Velocity test.

Enlist the works which are taken as building maintenance.

Explain the process of grouting.

What are the essential parameters of repair material? Classify repair materials based on its application.

Write short note on Vacuum concrete.

Discuss Sulphur Infiltrated concrete.

What is meant by carbonation of concrete? What are the factors affecting rate of carbonation and how it is determined in concrete?

Write short note on Ferro cement.

Enlist different crack repair techniques. Explain any one in detail.

Explain alkali aggregate reaction. What are the factors promoting it? How it can be controlled?

Write short note on Polymer concrete.

Discuss gunniting technique and its applications in repairing and rehabilitation.

Explain Rebound Hammer test with neat sketches.

Write short note on visual inspection to assess fire damaged structures.

Write short not on freezing and thawing.

What is SHM? How SHM can be applied to buildings. Explain in detail.