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Metadata Files

Data Publication

Triaxial compressive strength tests on 'Comiso' Limestone (Ragusa Formation; Sicily, Italy) samples

Castagna, Angela | Fazio, Marco | Benson, Philip M | Vinciguerra, Sergio | Walker, Richard | Ougier-Simonin, Audrey

NERC EDS National Geoscience Data Centre

(2023)

Descriptions

This dataset contains raw experimental triaxial testing data as outlined in "Castagna, A., Ougier‐Simonin, A., Benson, P. M., Browning, J., Walker, R. J., Fazio, M., & Vinciguerra, S. (2018). Thermal damage and pore pressure effects of the Brittle‐Ductile transition in Comiso limestone. Journal of Geophysical Research: Solid Earth, 123(9), 7644-7660.s, http://dx.doi.org/10.1029/2017JB015105". The data is provided in a .zip folder containing the files of 16 experiments that are accompanied by a README file for introduction. Files format is Microsoft Excel Worksheet (.xlsx) and data are tabulated. Each file contains the corresponding relevant sample’s details, and each column of data is clearly labelled, units included. For each experiment, time, radial and axial pumps volume displacements and pressures, top and bottom pore fluid pumps volume displacements and pressures, internal temperature, LVDT signals were recorded. Twenty right cylindrical samples of ‘Comiso’ limestone (Ragusa Formation; Sicily) were tested in triaxial compression at a range of confining pressures simulating depths of 290 m, 620 m, 1.2 km, and 2.0 km respectively, assuming an average density of the over-burden load of 2470 kg/m3. Prior to strength test, each sample was either oven dried (ca. 12 hours at 85 °C followed by cooling in a desiccator for 1 hour) or water saturated (samples in distilled water under vacuum for 24 hours). A subset of these samples has also been thermally treated at 150, 300, 450 and 600oC to induce thermal cracking prior to the mechanical testing. All tests were conducted at 10-5 s-1 axial strain rate in assumed drained conditions when relevant, and at room temperature. For saturated tests, the initial loading was applied in two steps, first by increasing Pc hydrostatically (σ1=σ2=σ3) until the desired confining pressure was reached, and then introducing pore fluid pressure, as per the functionality of the experimental set-up. The experiments were conducted by Drs A. Castagna, M. Fazio and P. Benson using the Snachez triaxial cell at the Rock Mechanics Laboratory of the University of Portsmouth. All responsible for the collection and initial interpretation of the data. Only 17 experiments are reported in this set of data; the missing 3 datasets are believed to be only available on the local computer storage of the triaxial apparatus used at that time.

Keywords


Originally assigned keywords
sedimentary rock
carbonate rock
deformation testing
compression testing
triaxial (conventional) apparatus
thermal treatment
pore fluid
de-ionized water
strength
triaxial compressive strength (s1>s2=s3)
residual strength
elastic strain
vinelastic strain
pore fluid pressure
Young's modulus
bulk sample deformation behaviour
brittle deformation
brittle-ductile deformation
shear failure
shear fracturing
limestone

Corresponding MSL vocabulary keywords
sedimentary rock
carbonate minerals
deformation testing
compression testing
de-ionized water
residual strength
residual strength
elastic strain
elastic strain
pore fluid pressure
pore fluid pressure
Young's modulus
poroelastic deformation
Young's modulus
brittle deformation
brittle-ductile deformation
shear failure
limestone

MSL enriched keywords
sedimentary rock
minerals
carbonate minerals
Apparatus
deformation testing
compression testing
liquid phase
water in pores
de-ionized water
Measured property
mechanical strength
residual strength
Measured property
mechanical strength
residual strength
strain
elastic strain
strain
elastic strain
pore fluid pressure
pore fluid pressure
elasticity
Young's modulus
Inferred deformation behavior
deformation behaviour
poroelastic deformation
elasticity
Young's modulus
brittle deformation
brittle-ductile deformation
localized deformation
shear failure
limestone
triaxial compressive strength (s1>s2=s3)
Comiso limestone
triaxial compression apparatus
microphysical deformation mechanism
intragranular cracking

MSL enriched sub domains i

rock and melt physics
analogue modelling of geologic processes

Source

https://www2.bgs.ac.uk/nationalgeosciencedatacentre/citedData/catalogue/e331aaf6-84cb-4b6e-9fa6-166bd90a42f0.html

Source publisher

NERC EDS National Geoscience Data Centre


DOI

10.5285/e331aaf6-84cb-4b6e-9fa6-166bd90a42f0


Creators

Castagna, Angela

University of Leicester

Fazio, Marco

University of Portsmouth

Benson, Philip M

University of Portsmouth

Vinciguerra, Sergio

University of Leicester

Walker, Richard

University of Leicester

Ougier-Simonin, Audrey

British Geological Survey


Citation

Castagna, A., Fazio, M., Benson, P. M., Vinciguerra, S., Walker, R., & Ougier-Simonin, A. (2023). Triaxial compressive strength tests on 'Comiso' Limestone (Ragusa Formation; Sicily, Italy) samples [Data set]. NERC EDS National Geoscience Data Centre. https://doi.org/10.5285/E331AAF6-84CB-4B6E-9FA6-166BD90A42F0


Dates

Available:

2023-09-21