5.3. Slump and Workability Checks

Try these first

1. 1.

   What does the slump test measure?

   Hint

   Think about what needs to stay fluid during pouring.

2. 2.

   What happens to slump in hot weather?

   Hint

   Consider what happens to water under high temperature.

3. 3.

   What is the primary purpose of the slump test?

   • To measure the strength of concrete
   • To assess its workability
   • To predict long-term durability

   Hint

   Think about what approach you would take to place concrete.

4. 4.

   True or False: In cold weather, slump can be falsely increased due to the use of heated water.

   • True
   • False

   Hint

   Reflect on temperature effects on water's physical properties.

5. 5.

   Design a concrete mix for a hot summer day with a forecasted temperature of 40°C. What specific measures would you implement to maintain workability?

   Hint

   Think about how modifying the mix components can manage temperature effects.

6. 6.

   You're tasked with a cold weather pour below 0°C. How will you adjust your slump testing process to ensure accurate readings?

   Hint

   How does heated water impact your overall concrete workability?