Concrete Strength
Concrete is measured by its strength capacity. MPa (megapascals) is the metric measurement for psi or pounds per square inch. The BC Building Codes require a minimum MPa for specific concrete projects. Please refer to the table to choose the appropriate MPa for your project.
Notes:
- Concrete is mixed with the correct “air-entrainment” (optimum air content). The following are some general guidelines.
- For garages, carports and any exterior flatwork that will be troweled, keep air in the low range – close to 5%. This will help reduce “crusting“ of the surface and blistering.
- For exterior flatwork that will not be troweled (broomed, exposed, etc.), keep air around 6% for freeze-thaw durability.
- For interior flatwork that will be troweled, keep air around 4%. This will help control bleeding and not cause blistering.