In concrete technology, what is the significance of lowering the permeability?

Lowering the permeability in concrete technology is significant primarily because it enhances water tightness. By reducing the permeability, the concrete becomes less porous, which minimizes the intrusion of water and harmful substances through its matrix. This increased water tightness is crucial for the durability and longevity of concrete structures, particularly in environments where they may be exposed to moisture, chemicals, or freeze-thaw cycles.

Consequently, enhancing the water tightness helps prevent deterioration caused by water ingress, which can lead to issues like corrosion of reinforcing steel, efflorescence, and concrete cracking. Overall, this quality is essential for ensuring the structural integrity and performance of concrete in various applications.