22.4. Mix Design for Polymer-Modified Concrete

Try these first

1. 1.

   What is the typical range of cement used in PMC mix designs?

   Hint

   Think about the standard quantity of cement used in construction.

2. 2.

   What is the desirable range for water-to-cement ratio in PMC?

   Hint

   Consider how adding too much water affects the concrete.

3. 3.

   What is the appropriate percentage of polymer in a PMC mix?

   • 5%
   • 10-20%
   • 50%

   Hint

   Reflect on the section discussing polymer dosage.

4. 4.

   True or False: A higher water-to-cement ratio always leads to better concrete.

   • True
   • False

   Hint

   Think about the roles of water and cement in strength.

5. 5.

   A contractor wants to create a mix for a waterproofing membrane using PMC. They need a total volume of 5 m³. If using 400 kg/m³ cement and maintaining a water-to-cement ratio of 0.4, calculate the amount of polymer, water, fine aggregates, and coarse aggregates needed.

   Hint

   Work step-by-step based on volumetric requirements.

6. 6.

   You are tasked with designing an eco-friendly PMC mix. Discuss which additives might be beneficial and why, considering the implications of polymer and environmental sustainability.

   Hint

   Think about each component’s role and environmental impact.