Concrete repair:

The design life of a building means the life span of buildings and various structures which is normally designed for the specific period of survival.

Around us, we come across different types of structures that have stood the test of time.

Somehow those structures exhibit distress signs because of a variety of reasons.

Reasons like exposure to the environment, a fault within the design, bad workmanship, improper consideration in the design, overloading, and even misuse.

For providing the most suitable repair method, we should have to investigate first the cause behind the distress.

Here I am discussing very important parameters to which we can decide which repair we can use.

1. Very low shrinkage property
   

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2. Good Bond strength with the foundation material
   

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3. Setting the property of concrete as well as hardening property of concrete
   

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4. Workability
   

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5. Compatible Coefficient for thermal expansion
   

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6. Non-pollutant and non-toxic
   

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7. Cost-effective
   

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8. Low air and water permeability
   

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9. Alkaline
   

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10. Minimal curing time
    

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11. Ability to withstand the movement induced
    

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12. Aesthetically good

Concrete repairs in nuclear reactors:

Basically, the durability of nuclear power plant safety-related concrete structures is really very high.

More or less the causes can be related to improper selection of material and design for construction improperness.

I will give you here examples of some of these problems:

• Strength parameters
• Voids under post-tensioning tendon
• Bearing plates
• Cracking of post-tensioning anchor heads
• Contentment did
• Misplaced steel reinforcement.
• Water contaminated corrosion inhibitor.

Thank You.