Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effectiveness of Fracture Sealing with Bentonite Grouting
Bentonite is known to have an extremely low permeability and a self-healing ability. It has therefore been selected as a major sealing component in several repository concepts. Bentonite fracture grouting tests are performed on a model made of circular acrylic plates. Suspensions with bentonite concentration have been injected into the fractures. Grouting reduces the hydraulic conductivities of the fractures. When the suspension is thin enough and the fracture is very small, channeling develops in the grouted fractures. Preliminary results indicate that the permeability of a grouted fracture does not increase with time in more than 125 days. The flow properties of bentonite suspensions, viscosity, shear stress, yield stress and gelation, are investigated. Water flow through ungrouted fractures and movement of water in bentonite grout are studied. The physical stability or bleeding capacity of bentonite suspensions is determined.
Effectiveness of Fracture Sealing with Bentonite Grouting
Bentonite is known to have an extremely low permeability and a self-healing ability. It has therefore been selected as a major sealing component in several repository concepts. Bentonite fracture grouting tests are performed on a model made of circular acrylic plates. Suspensions with bentonite concentration have been injected into the fractures. Grouting reduces the hydraulic conductivities of the fractures. When the suspension is thin enough and the fracture is very small, channeling develops in the grouted fractures. Preliminary results indicate that the permeability of a grouted fracture does not increase with time in more than 125 days. The flow properties of bentonite suspensions, viscosity, shear stress, yield stress and gelation, are investigated. Water flow through ungrouted fractures and movement of water in bentonite grout are studied. The physical stability or bleeding capacity of bentonite suspensions is determined.
Effectiveness of Fracture Sealing with Bentonite Grouting
C. Ran (Autor:in) / J. J. K. Daemen (Autor:in)
1991
198 pages
Report
Keine Angabe
Englisch
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