Salt-concrete (or salzbeton) is a building material that is used to reduce the water inflow in mining shafts in salt mines. It is composed of 16% cement, 39% halite, 16% limestone powder, 14% water and 15% sand.[1]
History
[edit]Salt-concrete was used for the first time in 1984 in the potash mine in Rocanville in Canada.[2] A salt-concrete seal was also installed in the Asse II mine in Lower Saxony in 1995.[3]
Filling tunnels
[edit]Since the end of the repository for radioactive waste Morsleben in 1998, the salt dome stability deteriorated to a state where it could collapse. Since 2003, a volume of 480,000 m3 of salt-concrete has been pumped into the pit to temporarily stabilize the upper levels. In addition another 4,000,000 m3 of salt-concrete will be used to temporarily stabilize the lower levels.[4]
See also
[edit]- Friedel's salt
- synthesized first by Georges Friedel
- Sorel cement
- produced first by Stanislas Sorel
- Saltcrete
References
[edit]- ^ pumpversatz Archived 2011-07-18 at the Wayback Machine
- ^ Thyssen
- ^ Investigation of a Salt-concrete seal Archived 2006-09-30 at the Wayback Machine
- ^ "Endlager für radioaktive Abfälle Morsleben (ERAM)". Archived from the original on 2009-02-26.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction