16.3. Measures to Minimize Effects

Try these first

1. 1.

   What is loss of workability?

   Hint

   Think about what happens to concrete if not properly taken care of.

2. 2.

   Name a method to prevent cold joints.

   Hint

   Consider time management during concrete operations.

3. 3.

   What causes loss of workability in concrete?

   • Excess water
   • Delay in mixing and placing
   • Too much aggregate

   Hint

   Think about the process of concrete setting.

4. 4.

   True or False: Cold joints form when new concrete is placed too soon after the initial setting.

   • True
   • False

   Hint

   What does delayed placement lead to?

5. 5.

   How would you design a concrete mixing and placement timetable to prevent cold joints in a large construction project?

   Hint

   Consider how logistics influence concrete quality.

6. 6.

   Discuss how varying temperatures might affect the need for retarding admixtures in different climates.

   Hint

   Think about seasonal changes and their impact on concrete handling.