Porosity and engineering parameters of thermally degraded Westerly granite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F23%3A00578252" target="_blank" >RIV/67985831:_____/23:00578252 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985891:_____/23:00578252

Výsledek na webu

<a href="https://onepetro.org/ARMAUSRMS/proceedings-abstract/ARMA23/All-ARMA23/532395" target="_blank" >https://onepetro.org/ARMAUSRMS/proceedings-abstract/ARMA23/All-ARMA23/532395</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.56952/ARMA-2023-0378" target="_blank" >10.56952/ARMA-2023-0378</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Porosity and engineering parameters of thermally degraded Westerly granite

Popis výsledku v původním jazyce

We present a textural analysis study based on the combination of ultrasonic testing (UT) and mercury intrusion porosimetry (MIP) of 36 Westerly granite (WG) samples exposed to different heating temperatures in the range between 100°C and 800°C. Specimens subjected to elevated temperature treatment were also subjected to the thin section analysis. Identical WG cylindrical specimens with diameter 11.5 and height 15 mm were used for UT and MIP study. UT of all specimens was made by P and S wave 1 MHz resonant frequency sensors. It was found that P-S wave velocity, amplitude, frequency and elastic modulus decrease more than 60% as a result of thermal rock material disintegration due to the increased temperature treatment. The damage parameters based on measured values were also determined. MIP showed that the pore size distributions vary with different heating temperature in dependence of the thermal WG treatment. The higher rising porosity values were observed for samples with heating temperature > 500°C. The influence of thermal treatment to the 3D – velocity distribution of P, S1, S2 by UT of spherical sample of 50 mm in diameter was also studied, that enables us to calculate full stiffness tensor. Based on the knowledge of stiffness tensor of WG material heated up to 800°C and loaded to hydrostatic pressure up to 120 MPa the 3D distribution of dynamic engineering parameters like Young and shear modulus and Poisson ratio were determined. Fundamental dynamic engineering parameters for material primary directions in temperature range 100 – 800°C and pressure range 0.1 to 120 MPa were determined.

Název v anglickém jazyce

Porosity and engineering parameters of thermally degraded Westerly granite

Popis výsledku anglicky

We present a textural analysis study based on the combination of ultrasonic testing (UT) and mercury intrusion porosimetry (MIP) of 36 Westerly granite (WG) samples exposed to different heating temperatures in the range between 100°C and 800°C. Specimens subjected to elevated temperature treatment were also subjected to the thin section analysis. Identical WG cylindrical specimens with diameter 11.5 and height 15 mm were used for UT and MIP study. UT of all specimens was made by P and S wave 1 MHz resonant frequency sensors. It was found that P-S wave velocity, amplitude, frequency and elastic modulus decrease more than 60% as a result of thermal rock material disintegration due to the increased temperature treatment. The damage parameters based on measured values were also determined. MIP showed that the pore size distributions vary with different heating temperature in dependence of the thermal WG treatment. The higher rising porosity values were observed for samples with heating temperature > 500°C. The influence of thermal treatment to the 3D – velocity distribution of P, S1, S2 by UT of spherical sample of 50 mm in diameter was also studied, that enables us to calculate full stiffness tensor. Based on the knowledge of stiffness tensor of WG material heated up to 800°C and loaded to hydrostatic pressure up to 120 MPa the 3D distribution of dynamic engineering parameters like Young and shear modulus and Poisson ratio were determined. Fundamental dynamic engineering parameters for material primary directions in temperature range 100 – 800°C and pressure range 0.1 to 120 MPa were determined.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA21-26542S" target="_blank" >GA21-26542S: Vliv postgenetických přeměn žul na jejich odolnost vůči zvětrávacím procesům v historických stavbách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

57th U.S. Rock Mechanics/Geomechanics Symposium. Proceeding papers

ISBN

978-0-9794975-8-2

ISSN

—

e-ISSN

—

Počet stran výsledku

4

Strana od-do

2023-0378

Název nakladatele

American Rock Mechanics Association

Místo vydání

Atlanta, Georgia

Místo konání akce

Atlanta, Georgia

Datum konání akce

25. 6. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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