What is the minimum compressive strength of concrete for a garage floor slab in severe weathering conditions?

The minimum compressive strength of concrete for a garage floor slab in severe weathering conditions is 3,500 PSI. This strength is specified to ensure that the concrete can withstand the challenges posed by severe weather, such as freeze-thaw cycles, which can lead to cracking and deterioration if the concrete is not robust enough.

Concrete with a compressive strength of 3,500 PSI is more durable and suitable for applications exposed to harsher conditions, providing better resistance to moisture absorption and subsequent damage from freezing temperatures. Higher strength mixes also typically have lower permeability, which is crucial for preventing water and de-icing agents from penetrating the concrete and causing damage.

In climates with severe weathering, it is essential to choose a concrete mix that can reliably perform over time, ensuring structural integrity and longevity of the garage floor. Therefore, 3,500 PSI is the accepted minimum for safety and durability in these harsh environments.