Mechanical and Setting/Hardening Conditions of Cement Pastes for Evaporator Concentrates Incorporating Admixtures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00337631" target="_blank" >RIV/68407700:21110/20:00337631 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/5.0031157" target="_blank" >http://dx.doi.org/10.1063/5.0031157</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0031157" target="_blank" >10.1063/5.0031157</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical and Setting/Hardening Conditions of Cement Pastes for Evaporator Concentrates Incorporating Admixtures

Popis výsledku v původním jazyce

With the rising amounts of radioactive wastes and the planned construction of safe long-term disposal facilities there is obvious need to find appropriate immobilization techniques for specified types of waste. The paper investigates the properties of binders suitable for the encapsulation of evaporator concentrates - an intermediate-level radioactive waste rich in borates and other salts. The article presents a binder based on a mixture of cements with lowered amount of gypsum content to deal with high setting times of cement in the presence of borates. Further on, selected admixtures are added to the system to increase the sorption capacity of such a mixture, namely natural zeolite, bentonite, blast furnace slag and silica fume. The investigation was aimed at the effects of these admixtures on the setting and hardening conditions and mechanical properties. In the dose of 5% of the binder weight, none of the admixtures has a significant effect on the compressive neither flexural strength. Setting times are very slightly prolonged by the presence of blast furnace slag and bentonite, silica fume slightly shortens the setting and hardening periods, while zeolite does not have a marked impact.

Název v anglickém jazyce

Mechanical and Setting/Hardening Conditions of Cement Pastes for Evaporator Concentrates Incorporating Admixtures

Popis výsledku anglicky

With the rising amounts of radioactive wastes and the planned construction of safe long-term disposal facilities there is obvious need to find appropriate immobilization techniques for specified types of waste. The paper investigates the properties of binders suitable for the encapsulation of evaporator concentrates - an intermediate-level radioactive waste rich in borates and other salts. The article presents a binder based on a mixture of cements with lowered amount of gypsum content to deal with high setting times of cement in the presence of borates. Further on, selected admixtures are added to the system to increase the sorption capacity of such a mixture, namely natural zeolite, bentonite, blast furnace slag and silica fume. The investigation was aimed at the effects of these admixtures on the setting and hardening conditions and mechanical properties. In the dose of 5% of the binder weight, none of the admixtures has a significant effect on the compressive neither flexural strength. Setting times are very slightly prolonged by the presence of blast furnace slag and bentonite, silica fume slightly shortens the setting and hardening periods, while zeolite does not have a marked impact.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA17-11635S" target="_blank" >GA17-11635S: Cementové kompozity k imobilizaci radionuklidů</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of International Conference on Numerical Analysis and Applied Mathematics 2019 (ICNAAM-2019)

ISBN

978-0-7354-4025-8

ISSN

—

e-ISSN

0094-243X

Počet stran výsledku

3

Strana od-do

—

Název nakladatele

AIP Conference Proceedings

Místo vydání

New York

Místo konání akce

Rhodes

Datum konání akce

23. 9. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—