5. Durability Classification and Exposure Conditions

Try these first

1. 1.

   What is the water-cement ratio for moderate exposure conditions?

   Hint

   Look for the minimum requirements in the classification.

2. 2.

   Which grade is specified for a mild environment?

   Hint

   Refer back to the grading classifications.

3. 3.

   What is the minimum grade of concrete for moderate exposure conditions?

   • M20
   • M25
   • M30

   Hint

   Check the exposure conditions classification.

4. 4.

   True or False: A higher water-cement ratio improves the durability of concrete.

   • True
   • False

   Hint

   Think about how water affects concrete structure.

5. 5.

   A new recreational facility is being planned at a coastal location. Describe the durability requirements for the concrete mix considering the severe exposure conditions.

   Hint

   Think about marine influences on concrete.

6. 6.

   Analyze the potential consequences of using M20 concrete for an outdoor structure in a moderate exposure condition.

   Hint

   Consider the impact of durability restrictions.