2.4. Balancing Water to Cement Ratio

Try these first

1. 1.

   What is the ideal water-cement ratio for strong concrete?

   Hint

   Think about strength versus porosity.

2. 2.

   What role does curing play in concrete?

   Hint

   It's all about keeping the water in.

3. 3.

   What is the maximum depth of an acceptable footprint for machine floating?

   • 1/2 inch
   • 1/4 inch
   • 1/8 inch

   Hint

   Remember the different requirements for machine vs. hand floating.

4. 4.

   True or False: Curing is not necessary if the water-cement ratio is low.

   • True
   • False

   Hint

   Think about the hydration process.

5. 5.

   If a concrete mix has a water-cement ratio of 0.4 and another has a ratio of 0.3, which mix would theoretically have higher strength? Explain why.

   Hint

   Consider how excess water influences porosity and strength.

6. 6.

   Discuss how an inadequate curing process could affect the long-term performance of high strength concrete mixes.

   Hint

   Think about the hydration process and its dependence on moisture.