Effects of Gamma-Ray Irradiation on Hardened Cement Mortar

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00351854" target="_blank" >RIV/68407700:21110/21:00351854 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1186/s40069-020-00452-7" target="_blank" >https://doi.org/10.1186/s40069-020-00452-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1186/s40069-020-00452-7" target="_blank" >10.1186/s40069-020-00452-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of Gamma-Ray Irradiation on Hardened Cement Mortar

Popis výsledku v původním jazyce

The effect of gamma-ray irradiation on cement mortar properties is investigated in this study in order to understand the mechanism behind the strength and stiffness reduction, which may be significant according to the available researches. Co-60 irradiation facility with the generating dose rate of 0.1-10 Gy/s and the total activity of 4.4 center dot 10(15) Bq (120 kCi) was used to perform the irradiation, so that the total observed dose of the irradiated samples reached the values ranging from 12.0 to 15.0 MGy. An identical set of control samples was placed in the same laboratory conditions away from gamma radiation. The results of nanoindentation, X-ray diffraction analysis and mercury intrusion porosimetry of the irradiated and the control samples are shown and explained in detail in this study. The nanoindentation creep compliance and the nanoindentation elastic modulus of the irradiated and the control samples do not show any significant difference. The mineral composition obtained using the X-ray diffraction analysis of the irradiated and the control samples is also similar. The pore structure rearrangement and microcrack occurrence, which were evidenced by the mercury intrusion porosimetry and scanning electron microscopy, led to the porosity increase and may be attributed to the significant decrease of compressive strength.

Název v anglickém jazyce

Effects of Gamma-Ray Irradiation on Hardened Cement Mortar

Popis výsledku anglicky

The effect of gamma-ray irradiation on cement mortar properties is investigated in this study in order to understand the mechanism behind the strength and stiffness reduction, which may be significant according to the available researches. Co-60 irradiation facility with the generating dose rate of 0.1-10 Gy/s and the total activity of 4.4 center dot 10(15) Bq (120 kCi) was used to perform the irradiation, so that the total observed dose of the irradiated samples reached the values ranging from 12.0 to 15.0 MGy. An identical set of control samples was placed in the same laboratory conditions away from gamma radiation. The results of nanoindentation, X-ray diffraction analysis and mercury intrusion porosimetry of the irradiated and the control samples are shown and explained in detail in this study. The nanoindentation creep compliance and the nanoindentation elastic modulus of the irradiated and the control samples do not show any significant difference. The mineral composition obtained using the X-ray diffraction analysis of the irradiated and the control samples is also similar. The pore structure rearrangement and microcrack occurrence, which were evidenced by the mercury intrusion porosimetry and scanning electron microscopy, led to the porosity increase and may be attributed to the significant decrease of compressive strength.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

International Journal of Concrete Structures and Materials

ISSN

1976-0485

e-ISSN

2234-1315

Svazek periodika

15

Číslo periodika v rámci svazku

17

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

14

Strana od-do

—

Kód UT WoS článku

000624539900001

EID výsledku v databázi Scopus

2-s2.0-85102029737