To produce impermeable concrete ………..

🔒 Producing Impermeable Concrete

Permeability in concrete is caused by interconnected capillary pores and cracks. All three listed measures work together to minimise permeability:

A — Thorough mixing ensures uniform distribution of water and cement, avoiding dry pockets that form permeable zones.

B — Proper compaction removes entrapped air and segregation, eliminating honeycombs and channels through which water can percolate.

C — Proper curing continues hydration so that capillary pores are progressively filled with C-S-H gel, reducing the connected porosity.

Key takeaway

Impermeable concrete needs: good mixing + full compaction + thorough curing. Missing any one leaves pathways for water.