Tanks, channels and treatment structures need concrete that limits leakage and resists the intended chemical exposure. Microsilica can help reduce permeability when it is used in a well-proportioned and properly cured mixture.
Material selection cannot compensate for poor joints, inadequate cover or uncontrolled cracking. Designers should define exposure classes, liquid chemistry, permeability criteria and crack-width limits. Contractors must maintain workability without adding uncontrolled water and provide effective curing.
Project controls
- Trial permeability and chemical-resistance performance
- Water-binder ratio and compatible admixtures
- Joint, waterstop and crack-control details
- Curing duration and temperature
- Batch COA and storage of microsilica
Review available microsilica grades and include the project exposure requirements in the inquiry.