These rocks form Transvaal Supergroup (Pretoria Group) comprising argillite, shale, quartzite, banded-hematite–quartzite (BHQ), and dolomite. The total overlying sequence is covered by Early …

Mar 9, 2010 · Argillite is defined as a type of sedimentary rock that contains a significant amount of clay minerals, including smectite, which contributes to its very low permeability and high capacity for …

Jul 1, 2024 · In contrast, for argillite or argillite-metakaolin based samples, a decrease of pore size as well as in pH values were observed with the increase of temperature. This behaviour was attributed …

Oct 15, 2024 · A MAS-NMR analysis of 29 Si, 27 Al and 1 H on the temperature's impact on geopolymer grouts derived from argillite and metakaolin

Nov 1, 2023 · Argillite is a complex heterogeneous material, in which the initial state (e.g., micro-fissures and cracks) and the orientation of these features has a significant impact on gas transport properties.

Oct 1, 2004 · The study of the physical and mechanical characteristics of argillites allows us to retain the state variables useful for the thermodynamic modelling …

Dec 1, 2020 · However, for the argillite and basalt, it was rather difficult to create pre-existing cracks deeper than 1 cm without fracturing the whole specimen. For this reason, both argillite and basalt …

Jan 1, 2007 · Argillite is considered a privileged candidate for long term nuclear waste storage. Yet argillite rock drilling often induces surface cracks that locally modify its permeability. This …

Jan 1, 2007 · The Callovo-Oxfordian argillite (clay shale) investigated by ANDRA is a sedimentary rock without significant anisotropic material properties (Hoteit et al., 1999, Su et al., 2003). Drill-and-blast …

Mar 1, 2023 · Argillite layers were deposited by suspension settling at the distal reaches of muddy turbidity currents, whereas the cherty intervals were deposited pelagically as siliceous oozes (similar …