17.5.3. Step 3: Estimation of Water Content

Try these first

1. 1.

   What is the typical slump value range for pavement applications?

   Hint

   Think about how the slump is defined.

2. 2.

   Name one factor that influences water content in concrete.

   Hint

   Consider what materials we use in concrete.

3. 3.

   What is the typical range of slump for pavement concrete?

   • 10-20 mm
   • 25-75 mm
   • 100-150 mm

   Hint

   Consider the specifications for workability.

4. 4.

   True or False: More water always leads to stronger concrete.

   • True
   • False

   Hint

   Think about the water-cement ratio.

5. 5.

   Design a concrete mix for a pavement application with a target slump of 70 mm. Given your aggregates are angular, describe how you would adjust your water content estimation.

   Hint

   Review the steps you learned on how aggregate shapes affect water recommendations.

6. 6.

   Discuss the long-term impacts of underestimating water content in a concrete mix for pavements. What signs might indicate issues later on?

   Hint

   Think about how the concrete behaves over time with insufficient water.