Water-blocking filler and filler for engineered multi-barriers using said water-blocking filler
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United States of America Patent
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Sep 20, 2016
Grant Date -
Feb 6, 2014
app pub date -
Oct 26, 2011
filing date -
Apr 18, 2011
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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.
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