11.6.1. Low Water-Cement Ratio

Try these first

1. 1.

   What does a low water-cement ratio improve in concrete?

   Hint

   Think about the characteristics of dense concrete.

2. 2.

   What is the recommended w/c ratio for aggressive environments?

   Hint

   Remember the specific threshold mentioned.

3. 3.

   What is the recommended water-cement ratio for harsh environments?

   • <0.30
   • <0.45
   • <0.50

   Hint

   Look for the specific recommendation in the section.

4. 4.

   True or False: A low water-cement ratio reduces the density of concrete.

   • True
   • False

   Hint

   Think about the impact of density on durability.

5. 5.

   Evaluate the effects of increasing the w/c ratio from 0.40 to 0.55 on a concrete structure located in a marine environment. What recommendations would you provide to mitigate potential issues?

   Hint

   Think about the effects of permeability on durability.

6. 6.

   Propose a concrete mix design for a building situated in an area with high sulfate exposure, ensuring durability and strength within a 0.45 w/c ratio. Justify your material choices.

   Hint

   Consider how each material contributes to strength and resistance.