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Relationship between durability index and uniaxial compressive strength of a gneissic rock at different weathering grades
https://orcid.org/0000-0001-8419-7696
Abstract This article presents a study on durability index obtained in the slake durability test (SDT) and the uniaxial compressive strength (UCS) of a gneissic rock from the Nova Venécia Complex, southeastern Brazil. The gneissic rock mass, excavated for a railway tunnel without a lining, has presented problems of instability of blocks due to a long-term exposure to weathering. The characterization of the gneissic rock matrix was made tactile and visual and by means of microscopical petrography, combining the tests of physical properties, SDT, and UCS with weathering indexes. The importance of describing the heterogeneity of the gneissic rock to interpret its influence on geotechnical parameters is discussed deeply. The interpretation of the results indicates that the rock studied has one facies with greater susceptibility to weathering, loss of strength, and durability. This study also proposes an equation to access the alterability parameter, recently added in the 2014 update of the rock mass rating (RMR), which may be overvalued to crystalline rocks, as observed in the analysis.
Relationship between durability index and uniaxial compressive strength of a gneissic rock at different weathering grades
https://orcid.org/0000-0001-8419-7696
Abstract This article presents a study on durability index obtained in the slake durability test (SDT) and the uniaxial compressive strength (UCS) of a gneissic rock from the Nova Venécia Complex, southeastern Brazil. The gneissic rock mass, excavated for a railway tunnel without a lining, has presented problems of instability of blocks due to a long-term exposure to weathering. The characterization of the gneissic rock matrix was made tactile and visual and by means of microscopical petrography, combining the tests of physical properties, SDT, and UCS with weathering indexes. The importance of describing the heterogeneity of the gneissic rock to interpret its influence on geotechnical parameters is discussed deeply. The interpretation of the results indicates that the rock studied has one facies with greater susceptibility to weathering, loss of strength, and durability. This study also proposes an equation to access the alterability parameter, recently added in the 2014 update of the rock mass rating (RMR), which may be overvalued to crystalline rocks, as observed in the analysis.
Relationship between durability index and uniaxial compressive strength of a gneissic rock at different weathering grades
https://orcid.org/0000-0001-8419-7696
Abstract This article presents a study on durability index obtained in the slake durability test (SDT) and the uniaxial compressive strength (UCS) of a gneissic rock from the Nova Venécia Complex, southeastern Brazil. The gneissic rock mass, excavated for a railway tunnel without a lining, has presented problems of instability of blocks due to a long-term exposure to weathering. The characterization of the gneissic rock matrix was made tactile and visual and by means of microscopical petrography, combining the tests of physical properties, SDT, and UCS with weathering indexes. The importance of describing the heterogeneity of the gneissic rock to interpret its influence on geotechnical parameters is discussed deeply. The interpretation of the results indicates that the rock studied has one facies with greater susceptibility to weathering, loss of strength, and durability. This study also proposes an equation to access the alterability parameter, recently added in the 2014 update of the rock mass rating (RMR), which may be overvalued to crystalline rocks, as observed in the analysis.
Relationship between durability index and uniaxial compressive strength of a gneissic rock at different weathering grades
Monticelli, João P. (author) / Ribeiro, Rogério (author) / Futai, Marcos (author)
2019
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Correlation Between Point Load Index and Uniaxial Compressive Strength for Different Rock Types
| British Library Online Contents | 2012
Correlation Between Point Load Index and Uniaxial Compressive Strength for Different Rock Types
| Online Contents | 2011