3.5. Demoulding and Finishing

Try these first

1. 1.

   What is the main reason for timing the demoulding process?

   Hint

   Think about the consequences of removing an element too early.

2. 2.

   List two types of finishes used for precast concrete surfaces.

   Hint

   Recall the different surface appearances we discussed.

3. 3.

   Why is it important to wait before demoulding concrete?

   • To achieve aesthetic value
   • To ensure it has adequate strength
   • To reduce costs

   Hint

   Think about what could happen if it isn't strong enough.

4. 4.

   True or False: A textured finish may improve grip for walking surfaces.

   • True
   • False

   Hint

   Recall the functions of different finishes.

5. 5.

   Evaluate the pros and cons of using acid-etched finishes versus painted finishes for urban infrastructure elements. Which would you prefer and why?

   Hint

   Consider longevity and maintenance when weighing the two options.

6. 6.

   Design a testing plan for determining the optimal demoulding time for a particular variety of concrete used in precast elements. What parameters would you measure?

   Hint

   Think about how you assess whether concrete is ready to demould.