Experimental relationships among strength parameters in monoaxial loading conditions for porous effusive rocks (Contributo in atti di convegno)

Type
Label
  • Experimental relationships among strength parameters in monoaxial loading conditions for porous effusive rocks (Contributo in atti di convegno) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Alternative label
  • Rotonda T.; Verrucci L.; Tommasi P. (2014)
    Experimental relationships among strength parameters in monoaxial loading conditions for porous effusive rocks
    in Eurock 2014, Vigo, 27-29 Maggio 2014
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Rotonda T.; Verrucci L.; Tommasi P. (literal)
Pagina inizio
  • 339 (literal)
Pagina fine
  • 344 (literal)
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  • http://www.scopus.com/inward/record.url?eid=2-s2.0-84901321905&partnerID=q2rCbXpz (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Rock Engineering and Rock Mechanics: Structures in and on Rock Masses (literal)
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  • 6 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Department of Structural and Geotechnical Engineering, Sapienza University, Rome, Italy; National Research Council, Institute for Environmental Geology and Geo-Engineering, Rome, Italy (literal)
Titolo
  • Experimental relationships among strength parameters in monoaxial loading conditions for porous effusive rocks (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-1-138-00149-7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • Alejano, Perucho, Olalla & Jiménez ( (literal)
Abstract
  • Tests on different types of effusive volcanic rocks under monoaxial loading conditions, such as uniaxial compression test (UC), point load test (PL) and indirect tensile test (B), are reported. The considered lithotypes span a wide range of porosity mostly due to macropores dispersed in a continuous ground mass. Strength values are distributed over a wide range and are mainly controlled by porosity. Results were merged with literature strength data on other effusive volcanic rocks. Outcomes from laboratory tests indicate that the ratios between the uniaxial strength (?f ) and the point load strength index IS,50 and between ?f and the tensile strength (?t ) significantly depart from those proposed by ISRM (1985) and decrease as the porosity increases. Conversely the relationship between strength ratio ?t /IS,50 and porosity was found to be more or less constant. These results suggest that macroporosity affects in different ways shear and tensile modes of failure (typical of UC and B/PL tests, respectively). This is confirmed by the evidence that porosity has virtually the same influence on B and PL strengths. (literal)
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