Publication detail

An advanced assessment of mechanical fracture parameters of sandstones depending on the internal rock texture features

VAVRO, L. MALÍKOVÁ, L. FRANTÍK, P. KUBEŠ, P. KERŠNER, Z. VAVRO, M.

Original Title

An advanced assessment of mechanical fracture parameters of sandstones depending on the internal rock texture features

Type

journal article in Web of Science

Language

English

Original Abstract

In this paper, sandstones from three Czech localities were subjected to mechanical fracture tests to obtain their properties. Carboniferous sandstone from the Staříč site was primarily different from the two other Cretaceous sandstones from Podhorní Újezd and Javorka localities in the type of grain contact, as well as in their mineralogical composition of the rock matrix and cement. These differences were primarily reflected in different rock porosities. An advanced assessment of the fracture response of the chevron notch specimens made of sandstones subjected to three-point bending test was carried out by means of the GTDiPS program suggested for processing of the loading diagrams. Bending Young's modulus, mode I fracture toughness, and fracture energy were subsequently calculated for all tested sandstone samples. Obtained outcomes show that the sandstone from the Staříč mine exhibits several times higher values of investigated properties than the Podhorní Újezd and Javorka sandstones. This was a result of a higher degree of rock compaction, siliciferous rock cement and, therefore, relatively low total porosity. Internal rock texture and mineralogical composition of matrix or cement are thus one of the most important factors influencing the values of mechanical fracture parameters of sandstones.

Keywords

Sandstone; Mode I fracture toughness; Bending Young's modulus; Load–displacement diagram; Fracture test; Cylindrical specimen; Chevron type notch

Authors

VAVRO, L.; MALÍKOVÁ, L.; FRANTÍK, P.; KUBEŠ, P.; KERŠNER, Z.; VAVRO, M.

Released

28. 3. 2019

ISBN

1214-9705

Periodical

Acta Geodynamica et Geomaterialia

Year of study

16

Number

2

State

Czech Republic

Pages from

157

Pages to

168

Pages count

12

URL

https://www.irsm.cas.cz/index_en.php?page=acta_detail_doi&id=292

BibTex

@article{BUT156521,
  author="Leona {Vavro} and Lucie {Malíková} and Petr {Frantík} and Pavel {Kubeš} and Zbyněk {Keršner} and Martin {Vavro}",
  title="An advanced assessment of mechanical fracture parameters of sandstones depending on the internal rock texture features",
  journal="Acta Geodynamica et Geomaterialia",
  year="2019",
  volume="16",
  number="2",
  pages="157--168",
  doi="10.13168/AGG.2019.0013",
  issn="1214-9705",
  url="https://www.irsm.cas.cz/index_en.php?page=acta_detail_doi&id=292"
}