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Salt-saturated concrete strength and permeability
Laboratory-scale experiments applicable to the use of salt-saturated concrete as a seal material for a transuranic waste repository have been completed. Nitrogen gas permeability measurements were made using a flexible-wall permeameter, a confining pressure of 1 MPa, and gas pressure gradients ranging from 0.3 MPa to 0.75 MPa. Results show that salt-saturated concrete has very low intrinsic permeability with values ranging from 9.4X1087exp -22) m2 to 9.7x10-17 m2. Strength and deformation characteristics were investigated under conditions of triaxial compression with confining pressures ranging from 0 MPa to 15 MPa using either axial strain-rate or axial stress-rate control and show that the failure strength of concrete increases with confining pressure which can be adequately described through pressure-sensitive failure criteria. Axial, radial, and volumetric strains were also measured during each test and these data were used to determine elastic properties. Experimental results are applicable in the design and analysis of seal-related functions and apply to other concrete structures subjected to compressive loadings such as dams and prestressed structural members.
Salt-saturated concrete strength and permeability
Laboratory-scale experiments applicable to the use of salt-saturated concrete as a seal material for a transuranic waste repository have been completed. Nitrogen gas permeability measurements were made using a flexible-wall permeameter, a confining pressure of 1 MPa, and gas pressure gradients ranging from 0.3 MPa to 0.75 MPa. Results show that salt-saturated concrete has very low intrinsic permeability with values ranging from 9.4X1087exp -22) m2 to 9.7x10-17 m2. Strength and deformation characteristics were investigated under conditions of triaxial compression with confining pressures ranging from 0 MPa to 15 MPa using either axial strain-rate or axial stress-rate control and show that the failure strength of concrete increases with confining pressure which can be adequately described through pressure-sensitive failure criteria. Axial, radial, and volumetric strains were also measured during each test and these data were used to determine elastic properties. Experimental results are applicable in the design and analysis of seal-related functions and apply to other concrete structures subjected to compressive loadings such as dams and prestressed structural members.
Salt-saturated concrete strength and permeability
Salzgesättigter Beton. Festigkeit und Dichtheit
Pfeifle, T.W. (author) / Hansen, F.D. (author) / Knowles, M.K. (author)
1996
10 Seiten, 4 Bilder, 1 Tabelle, 11 Quellen
Conference paper
English
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