The matrix porosity and related properties of a leucocratic granite from the Krudum massif, West Bohemia

Title:

The matrix porosity and related properties of a leucocratic granite from the Krudum massif, West Bohemia

Creator:

Nováková, Lucie, Sosna, Karel, Brož, Milan, Jan Najser, and Novák, Petr

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:0e256ac3-75f6-48c3-b06a-d992cddad47a
uuid:0e256ac3-75f6-48c3-b06a-d992cddad47a
issn:1214-9705

Subject:

Geologie. Meteorologie. Klimatologie, skenovací elektronová mikroskopie, scanning electron microscopy, leucocratic granite, matrix porosity, geomechanical properties, hydraulic conductivity, ultrasonic velocities, 7, and 551

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

This paper investigates the matrix porosity and related properties of a leucocratic granite from the Krudum Massif, West Bohemia. The required samples were obtained from the 30-year old core of borehole KZ-25 (Material Documentation Depositories). In total, nine sample sets were taken from different depth levels within the borehole ranging from 18 m to 108 m. The hydraulic conductivity of the granite matrix was measured using a pressure cell whilst standard methods were employed to determine the dry density, connected porosity and total porosity. The pore size distribution was analysed using mercury porosimetry. The ultrasonic velo cities were measured using a pulse source and oscilloscope. Dynamic Young’s modulus, dynamic shear modulus, Poisson’s ratio, static Young’ s modulus, uniaxial compressive strength and moisture were determined according to measurements of ultrasonic velocities and deformability in uniaxial compression. The morphology and structure of the pore network was studied using high reso lution scanning electron microscopy. The overall porosity values defined by the different porosimetry methods follow the same trends although the absolute values differ according to the specific method. A logarithmic relationship was found to exist between hydraulic conductivity and porosity within the granite matrix. In addition, a slight depth dependence was noted in the porosity, hydraulic conductivity, bulk density, and ultrasonic velocities of the granite matrix. The SEM images have allowed precise mapping and detailed de scription of the pore network., Lucie Nováková, Karel Sosna, Milan Brož, Jan Najser and Petr Novák., and Obsahuje bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2012 Volume:9 | Number:4 (168)

Harvested from:

CDK

Metadata only:

false