Method for electrically controlled demolition of concrete
US6916411B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2002 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Sep 10, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB28D1/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method to demolish concrete that comprises electrically connecting rebar disposed within the concrete to a power supply, electrically connecting a counter electrode within electro-osmotic communication of the concrete to a power supply, and externally providing electrolyte as supplemental moisture for the concrete. An electric field is created within the concrete and causes water moisture to migrate toward the rebar thereby expediting the corrosion thereof. The corrosion of the rebar generates iron oxides, which because of their greater volume, cause areas of localized pressure within the concrete. As the corrosion process proceeds, an accumulation of oxides increases the localized pressure to cause cracking within the concrete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.