Method of realkalizing concrete in which carbonation has occurred
US5049412A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1990 |
| Grant date | Sep 17, 1991 |
| Priority date | — |
| Expiry date | Mar 16, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G23/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for realkalizing concrete, layers of which have become carbonated and thus acidified as result of exposure to air of the surface of the concrete. The method presupposes that the concrete still contains adjacent layers that have not yet become carbonated. A substantially water-tight adherent coating is applied to the surface of the concrete that is exposed to air. Thereafter, the concrete is caused to become saturated with water from a source external to the concrete structure, and this condition of saturation is maintained for a period of time sufficient to effect a diffusion of alkaline materials from the relatively less carbonated layers of the concrete into the relatively more carbonated layers thereof. The carbonated layers thus become realkalized, so that further deterioration of the concrete structure is significantly arrested.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.