Water-blocking filler and filler for engineered multi-barriers using said water-blocking filler
US9446380B2 · kind B2 · utility
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2References
3Claims
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Key dates
| Filing date | Oct 26, 2011 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Oct 26, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Provided are a water-blocking filler, the swelling properties of which do not decrease easily even when in contact with water containing calcium ions, and a filler for engineered multi-barriers with said water-blocking filler as the engineered multi-barrier filler. A water-blocking filler mainly comprising sodium bentonite obtained by mixing 30 weight % or less, in terms of inner percentage, of a pozzolan substance such as fly ash or silica fume with said bentonite, and a filler using said water-blocking filler that is used for engineered multi-barriers in radioactive waste disposal facilities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.