Why Does Water Pass Through Concrete?
Concrete looks solid, but its internal structure contains microscopic capillaries, pores and small voids.
Where concrete is exposed to groundwater, rainwater or hydrostatic pressure, these pathways can allow moisture to penetrate the structure.
This is particularly important for structures such as:
- basements;
- retaining walls;
- water tanks;
- reservoirs;
- lift pits;
- foundations;
- culverts; and
- underground structures.
Crystalline waterproofing provides one method of reducing this permeability.
How Crystalline Waterproofing Works
Systems such as Xypex and certain MasterSeal crystalline treatments use reactive chemicals that interact with moisture and components within cementitious materials.
The resulting crystalline formations develop inside the pores and capillary tracts of the concrete.
This blocks or significantly restricts pathways through which water would otherwise travel.
Unlike a conventional membrane located only on the surface, crystalline treatment interacts with the concrete itself.
Surface Preparation Is Critical
The effectiveness of the system still depends heavily on workmanship.
Before treatment, concrete may require:
- removal of coatings and laitance;
- cleaning of oil and contamination;
- treatment of honeycombing;
- repair of cracks;
- preparation of construction joints; and
- correct pre-wetting of the substrate.
A premium waterproofing material installed over a poorly prepared surface may still result in failure.
Where Tetrabuild Can Apply Crystalline Systems
Crystalline waterproofing can form part of a waterproofing strategy for underground concrete, tanks, retaining structures and other areas exposed to water.
The selected system should always be based on the actual water pressure, structure, concrete condition and manufacturer's technical requirements.
