Treatment of contaminated concrete
AssigneeKi Strategies Pty Ltd
InventorsAndrew Kita, Grant Scott
Life of this patent
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Abstract
The present invention relates to a method of reducing leaching and contamination from concrete and like cementitious materials that has been contaminated with per- and poly-fluoralkyl substances (‘PFAS’). The present invention additionally relates to a method of treating concrete and like cementitious materials that have been contaminated with PFAS to reduce the leaching of PFAS therefrom, and further provides a method of producing a PFAS impermeable concrete or like cementitious product.
Claims20
A method of treating a cementitious product to reduce leaching of PFAS from the cementitious product, the method comprising:
- identifying a cementitious product as either:
- likely to be subject to PFAS contamination, the cementitious product not previously being subject to substantial PFAS contamination;
- or
- contaminated with PFAS;
- treating a surface of the cementitious product with a penetrating sealer composition;
- and
- allowing the penetrating sealer composition to permeate into the cementitious product and cure within the cementitious product.
A method of treating a cementitious product to reduce leaching of PFAS from the cementitious product, the method comprising:
- identifying a cementitious product as either:
- likely to be subject to PFAS contamination, the cementitious product not previously being subject to substantial PFAS contamination;
- or
- contaminated with PFAS;
- treating a surface of the cementitious product with a base treatment composition, the base treatment composition comprising as dry components:
- 15-80 wt % cement;
- 5-50 wt % alkaline earth compounds;
- and
- 20-70 wt % silica sand;
- and
- allowing the base treatment composition to permeate into the cementitious product and cure within the cementitious product.
Dependencies are inferred from the claim text.