Effect of Gamma Irradiation on Pore -Space of Hardened Cement Paste

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00198816" target="_blank" >RIV/68407700:21110/12:00198816 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of Gamma Irradiation on Pore -Space of Hardened Cement Paste

Popis výsledku v původním jazyce

Hardened cement paste (HCP) has been exposed to ?-irradiation up to a dose of 1 MGy and then the changes of properties of the porous space were studied by mercury porosimetry and adsorption of nitrogen. It was found that the concentration of nanopores inthe hardened cement paste increases and the concentration of pores with a diameter in the range of 10 - 50 nm decreases due to ?-irradiation. The most significant change induced by irradiation is the specific pore area A and AM. It can be interpreted ascoarsening of an originally smooth surface of the pores. It corresponds to our hypothesis of so-called "radiation carbonation" of the HCP: the crystals of calcite growing during the carbonation decrease diameter of the pores and increase their surface.There is, however, another hypothesis about the effect of ?-irradiation on HCP: the ?-irradiation causes the radiolysis of water and this leads to drying of samples and can there- fore result in the shrinkage of HCP. Our experiments reall

Název v anglickém jazyce

Effect of Gamma Irradiation on Pore -Space of Hardened Cement Paste

Popis výsledku anglicky

Hardened cement paste (HCP) has been exposed to ?-irradiation up to a dose of 1 MGy and then the changes of properties of the porous space were studied by mercury porosimetry and adsorption of nitrogen. It was found that the concentration of nanopores inthe hardened cement paste increases and the concentration of pores with a diameter in the range of 10 - 50 nm decreases due to ?-irradiation. The most significant change induced by irradiation is the specific pore area A and AM. It can be interpreted ascoarsening of an originally smooth surface of the pores. It corresponds to our hypothesis of so-called "radiation carbonation" of the HCP: the crystals of calcite growing during the carbonation decrease diameter of the pores and increase their surface.There is, however, another hypothesis about the effect of ?-irradiation on HCP: the ?-irradiation causes the radiolysis of water and this leads to drying of samples and can there- fore result in the shrinkage of HCP. Our experiments reall

Druh

D - Stať ve sborníku

CEP obor

JF - Jaderná energetika

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

DEVELOPMENT OF MATERIALS SCIENCE IN RESEARCH AND EDUCATION

ISBN

978-80-260-2357-9

ISSN

—

e-ISSN

—

Počet stran výsledku

1

Strana od-do

67

Název nakladatele

Czechoslovak Association for Crystal Growth

Místo vydání

Prague

Místo konání akce

Lednice

Datum konání akce

3. 9. 2012

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—