17. Durability Considerations (From IS 456:2000 Table 5)

Try these first

1. 1.

   What is the maximum water-cement ratio for mild exposure conditions?

   Hint

   Look at the first row of the table for mild conditions.

2. 2.

   Define durability in the context of concrete.

   Hint

   Consider how long concrete lasts under different conditions.

3. 3.

   What is the maximum water-cement ratio for very severe environmental conditions?

   • 0.45
   • 0.40
   • 0.60

   Hint

   Check your table for very severe exposure.

4. 4.

   Is it beneficial to select higher water-cement ratios for durability?

   • True
   • False

   Hint

   Consider why dense concrete is better for durability.

5. 5.

   You have a project in a location classified as 'severe'. Calculate the appropriate maximum water-cement ratio and minimum cement content for an M30 grade mix.

   Hint

   Refer to the durability guidelines table.

6. 6.

   Reflect on a building that faced durability challenges. Discuss the likely parameters that were not adhered to based on exposure conditions.

   Hint

   Consider what the severity of the environment might require.