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New Methodology for Rocks’ Geomechanical Characterization with Schmidt Sclerometer
https://orcid.org/http://orcid.org/0000-0002-9266-2938
https://orcid.org/http://orcid.org/0000-0001-8825-2162
https://orcid.org/http://orcid.org/0000-0003-3895-1672
https://orcid.org/http://orcid.org/0000-0002-1614-7811
Hardness is a parameter that gives information about the behavior of rocks when subjected to certain deformations. Various non-destructive tests are available for hardness quantification, the use of the Schmidt Sclerometer is the most used due its expedition, among existing sclerometers, the Schmidt rebound hammer, type N-34, with an impact energy equal to 2,207 N.m (0.225 Kgm) was selected for experimental tests. Schmidt's hardness index (R) obtained were related to other physical parameters of the rock, namely uniaxial compressive strength (UCS), elasticity modulus (Ɛ), specific gravity and granularity. For comparison purpose, several literature’s methodologies are present focused on improving procedures and developing correlations for different rock types. In this sense, to assess the methodology that best suits granitic rocks’ characterization, several laboratorial and “in situ” tests from the literature were performed. Additionally, the paper proposes a new methodology based on the analysis of the results and a good relation between R and UCS parameters, concluding reliability on the methodology for values of non-porphyroid granitic rocks, predominantly biotitic and from medium to fine granularity, in a precise and consistent way.
New Methodology for Rocks’ Geomechanical Characterization with Schmidt Sclerometer
https://orcid.org/http://orcid.org/0000-0002-9266-2938
https://orcid.org/http://orcid.org/0000-0001-8825-2162
https://orcid.org/http://orcid.org/0000-0003-3895-1672
https://orcid.org/http://orcid.org/0000-0002-1614-7811
Hardness is a parameter that gives information about the behavior of rocks when subjected to certain deformations. Various non-destructive tests are available for hardness quantification, the use of the Schmidt Sclerometer is the most used due its expedition, among existing sclerometers, the Schmidt rebound hammer, type N-34, with an impact energy equal to 2,207 N.m (0.225 Kgm) was selected for experimental tests. Schmidt's hardness index (R) obtained were related to other physical parameters of the rock, namely uniaxial compressive strength (UCS), elasticity modulus (Ɛ), specific gravity and granularity. For comparison purpose, several literature’s methodologies are present focused on improving procedures and developing correlations for different rock types. In this sense, to assess the methodology that best suits granitic rocks’ characterization, several laboratorial and “in situ” tests from the literature were performed. Additionally, the paper proposes a new methodology based on the analysis of the results and a good relation between R and UCS parameters, concluding reliability on the methodology for values of non-porphyroid granitic rocks, predominantly biotitic and from medium to fine granularity, in a precise and consistent way.
New Methodology for Rocks’ Geomechanical Characterization with Schmidt Sclerometer
https://orcid.org/http://orcid.org/0000-0002-9266-2938
https://orcid.org/http://orcid.org/0000-0001-8825-2162
https://orcid.org/http://orcid.org/0000-0003-3895-1672
https://orcid.org/http://orcid.org/0000-0002-1614-7811
Hardness is a parameter that gives information about the behavior of rocks when subjected to certain deformations. Various non-destructive tests are available for hardness quantification, the use of the Schmidt Sclerometer is the most used due its expedition, among existing sclerometers, the Schmidt rebound hammer, type N-34, with an impact energy equal to 2,207 N.m (0.225 Kgm) was selected for experimental tests. Schmidt's hardness index (R) obtained were related to other physical parameters of the rock, namely uniaxial compressive strength (UCS), elasticity modulus (Ɛ), specific gravity and granularity. For comparison purpose, several literature’s methodologies are present focused on improving procedures and developing correlations for different rock types. In this sense, to assess the methodology that best suits granitic rocks’ characterization, several laboratorial and “in situ” tests from the literature were performed. Additionally, the paper proposes a new methodology based on the analysis of the results and a good relation between R and UCS parameters, concluding reliability on the methodology for values of non-porphyroid granitic rocks, predominantly biotitic and from medium to fine granularity, in a precise and consistent way.
New Methodology for Rocks’ Geomechanical Characterization with Schmidt Sclerometer
RILEM Bookseries
Chastre, Carlos (editor) / Neves, José (editor) / Ribeiro, Diogo (editor) / Pinho, Fernando F. S. (editor) / Biscaia, Hugo (editor) / Neves, Maria Graça (editor) / Faria, Paulina (editor) / Micaelo, Rui (editor) / Cavaleiro, Victor (author) / Marchiori, Leonardo (author)
International Conference on Testing and Experimentation in Civil Engineering ; 2022 ; Almada, Portugal
Testing and Experimentation in Civil Engineering ; Chapter: 10 ; 117-124
RILEM Bookseries ; 41
2023-06-06
8 pages
Article/Chapter (Book)
Electronic Resource
English
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