Arching Structures in Granular Sedimentary Deposits

0392958 - ÚCHP 2014 RIV CH eng J - Článek v odborném periodiku
Kulaviak, Lukáš - Hladil, Jindřich - Růžička, Marek - Drahoš, Jiří - Saint-Lary, L.
Arching Structures in Granular Sedimentary Deposits.
Powder Technology. Roč. 246, SEP (2013), s. 269-277. ISSN 0032-5910. E-ISSN 1873-328X
Grant CEP: GA ČR GA104/07/1110; GA AV ČR IAAX00130702; GA MŠMT(CZ) LG11014
Institucionální podpora: RVO:67985858 ; RVO:67985831
Klíčová slova: wet granulars * deposit * arching structure
Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství; DB - Geologie a mineralogie (GLU-S)
Impakt faktor: 2.269, rok: 2013

Experimental results on arching structures in sedimentary deposits are presented. Polydisperse mixtures of rough non-spherical natural calcite particles (ground limestone) settled collectively in a liquid, in a lab-scale experimental cylinder. At the bottom, layers of sediment were produced. The morphology of the deposit layers was studied with the help of visualization and image analysis. Families of interconnected arching patterns in the form of voids or cavities were identified, of highly complex geometry. The effect of the mixture composition on the deposit structure was investigated. It was found that arches tend to form under specific conditions. Large and small grains promoted the arch formation, while the medium grains tended to inhibit arching.
Trvalý link: http://hdl.handle.net/11104/0221696