Westerly Granite Study of Physical and Transport Properties Monitored by P and S Waves on Spherical Samples: Effect of Temperature and Hydrostatic Pressure

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F24%3A00619416" target="_blank" >RIV/67985831:_____/24:00619416 - isvavai.cz</a>

Alternative codes found

RIV/67985891:_____/24:00619416

Result on the web

<a href="https://doi.org/10.56952/ARMA-2024-0553" target="_blank" >https://doi.org/10.56952/ARMA-2024-0553</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.56952/ARMA-2024-0553" target="_blank" >10.56952/ARMA-2024-0553</a>

Result language

angličtina

Original language name

Westerly Granite Study of Physical and Transport Properties Monitored by P and S Waves on Spherical Samples: Effect of Temperature and Hydrostatic Pressure

Original language description

We investigate the thermal damage of Westerly granite (WG) using ultrasonic methods, mercury intrusion porosimetry, and micrographic observations. WG is of interest due to its relatively high strength and low permeability in intact conditions. Our study focuses on the impact of pressure and temperature on simultaneous heating of two spherical specimens to mitigate the effects of heterogeneity. The spheres were heated to temperatures of 100°C, 200°C, 350°C, 500°C, 650°C, and 800°C. One sphere was designated for a comparative study to measure changes in weight and size, while the second sphere underwent measurements of both P and S wave velocities in 132 independent directions under hydrostatic pressures ranging from 0.1 to 120 MPa at six different values of acting pressure. The data obtained enables us to calculate the full stiffness tensor of WG without presumptions and invert it to derive all elastic parameters in the principal material directions. Additionally, the specific shape of the specimen facilitates easy measurement of porosity, strain, and bulk modulus of WG, allowing us to investigate the isotropic orientation and uniformity of microcracks throughout the specimen's volume. We will compare these findings with results from common methods such as mercury intrusion porosimetry, thin section analysis, and P and S wave measurements. Furthermore, we will discuss the appropriateness of using thermal stressing to induce isotropic microcracking in the specimen. We will present the 3D dependencies of P and S wave velocities, along with their corresponding elastic constants determined in principal materials directions such as Young's modulus, shear modulus, and Poisson's ratio, as functions of temperature and pressure

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10505 - Geology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

58th U.S. Rock Mechanics/Geomechanics Symposium. Proceeding papers.

ISBN

978-0-9794975-9-9

ISSN

—

e-ISSN

—

Number of pages

8

Pages from-to

2024-0553

Publisher name

American Rock Mechanics Association

Place of publication

Atlanta, Georgia

Event location

Colorado

Event date

Jun 23, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—