2.4. Additives and Admixtures

Try these first

1. 1.

   What is the purpose of plasticizers in plaster?

   Hint

   What do you want to achieve to work easily with plaster?

2. 2.

   Name an additive that helps resist moisture.

   Hint

   Think of rain or damp environments.

3. 3.

   Which additive is used to improve the workability of plaster?

   • Accelerators
   • Plasticizers
   • Waterproofing agents

   Hint

   Think of how you would make plaster easier to handle.

4. 4.

   True or False: Retarders help to speed up the plaster setting time.

   • True
   • False

   Hint

   Consider the meaning of 'retard' in other contexts.

5. 5.

   Discuss how you would choose the appropriate additives for a plastering project exposed to high humidity conditions.

   Hint

   What challenges do high humidity conditions pose for plaster?

6. 6.

   Evaluate the impact of using accelerators in plaster for emergency repairs in winter conditions.

   Hint

   Why would speed be essential for repairs during a cold spell?