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Non-invasive repair and retrofitting of hardened reinforced concrete structures
US2018022656A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018022656-A1 |
| Application number | US-201615549789-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 9, 2016 |
| Priority date | Feb 9, 2015 |
| Publication date | Jan 25, 2018 |
| Grant date | — |
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Abstract
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An aqueous composition is used for repairing and/or sealing of hardened concrete structures, the aqueous composition including colloidal silica and polycarboxylate ether.
First claim
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1 . An aqueous composition for repairing and/or sealing of hardened concrete structures, the aqueous composition comprising colloidal silica and polycarboxylate ether. 2 . The aqueous composition according to claim 1 , wherein the weight average particle size of the colloidal silica is in the range of 1 nm to 150 nm. 3 . The aqueous composition according to claim 1 , wherein the weight average particle size of the colloidal silica is in the range of 5 nm to 10 nm. 4 . The aqueous composition according to claim 1 , wherein, based on the total weight of the aqueous composition, the content of colloidal silica is in the range of 1 to 50% by weight and the content of polycarboxylate ether is in the range of 1 to 50% by weight. 5 . The aqueous composition according to claim 1 , wherein, based on the total weight of the aqueous composition, the content of colloidal silica is in the range of 5 to 50% by weight and the content of polycarboxylate ether is in the range of 2 to 50% by weight. 6 . The aqueous composition according to claim 1 , wherein the polycarboxylate ether is a comb polymer. 7 . The aqueous composition according to claim 1 , wherein the total amount of colloidal silica, polycarboxylate ether and water, based on the total weight of the aqueous composition, is at least 80% by weight. 8 . The aqueous composition according to claim 1 , wherein, based on the total weight of the aqueous composition, the content of water is at least 15% by weight. 9 . A method for repairing and/or sealing a hardened concrete structure, comprising the step of applying an aqueous composition according to claim 1 to the hardened concrete structure or a part thereof. 10 . The method according to claim 9 , wherein the hardened concrete structure is a hardened reinforced concrete structure. 11 . The method according to claim 9 , wherein the aqueous composition is applied by injecting, migrating, infiltration or application onto the surface of the structure. 12 . The method according to claim 9 , wherein the hardened concrete structure includes cracks. 13 . The method according to claim 9 , wherein application of the aqueous composition to the hardened concrete structure is non-invasive. 14 . The method according to claim 9 , wherein the method comprises at least one additional treatment of the concrete structure selected from protecting the reinforcement by application of a corrosion inhibiting agent, crack sealing with a reactive agent or waterproofing of the surface of the concrete structure with a hydrophobic material. 15 . The aqueous composition according to claim 1 is used for repairing and/or sealing a hardened concrete structure.
Assignees
Inventors
Classifications
Repairing damaged coatings · CPC title
as filling material for cavities or the like · CPC title
Aqueous dispersion or solution · CPC title
Epoxy polymers · CPC title
Silica sols, alkyl, ammonium or alkali metal silicate cements · CPC title
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- What does patent US2018022656A1 cover?
- An aqueous composition is used for repairing and/or sealing of hardened concrete structures, the aqueous composition including colloidal silica and polycarboxylate ether.
- Who is the assignee on this patent?
- Sika Tech Ag
- What technology area does this patent fall under?
- Primary CPC classification C04B41/009. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jan 25 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).