22.2.a. Styrene-Butadiene Rubber (SBR) Latex

Try these first

1. 1.

   What does SBR stand for?

   Hint

   Think about the chemical components of this rubber.

2. 2.

   Name one application of SBR latex.

   Hint

   Consider where preventing water infiltration is critical.

3. 3.

   What is one major benefit of using SBR latex in concrete?

   • Increased weight
   • Improved water resistance
   • Slower setting time

   Hint

   Think about what happens when water interacts with concrete.

4. 4.

   True or False: SBR latex reduces the flexibility of concrete.

   • True
   • False

   Hint

   How does rubber behave compared to traditional concrete?

5. 5.

   Assuming the use of SBR latex results in a 30% increase in bond strength, calculate the bond strength of a concrete slab with an original bond strength of 2 MPa.

   Hint

   Calculate 30% of the original bond strength and add it back.

6. 6.

   A construction requires the application of SBR modified concrete in a basement. The area to be covered is 150 square meters. If SBR latex costs $2 per liter and the expected usage is 15 liters per 100 m2, calculate the total cost of SBR latex needed.

   Hint

   Use proportion to find out how much latex is needed for the specific area.