Mechanical properties of irradiated cement pastes for immobilization of evaporator concentrates

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F20%3AN0000029" target="_blank" >RIV/26722445:_____/20:N0000029 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21110/20:00341920

Result on the web

<a href="https://www.sciencedirect.com/science/article/abs/pii/S014919702030189X" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S014919702030189X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.pnucene.2020.103437" target="_blank" >10.1016/j.pnucene.2020.103437</a>

Result language

angličtina

Original language name

Mechanical properties of irradiated cement pastes for immobilization of evaporator concentrates

Original language description

The effects of gamma irradiation on the properties of concrete or cement composites have been investigated by several authors. However, the behaviour of composites immobilizing radioactive evaporator concentrates may be significantly affected by the altered chemistry of the matrix material. A newly proposed binder intended for the development of a composite immobilizing evaporator concentrates was investigated in terms of changes in its' mechanical properties due to gamma irradiation. Three kinds of cement pastes - a reference Portland cement paste (PC), a proposed binder as a mix of cements (NP) and a mixture "NP" containing a model evaporator concentrate (NP_C) - were irradiated by gamma source Co-60 in two subsequent experiments differing in conditions - non-sealed (on air) and sealed (in a glass box). Surface cracks appeared on the NP and NP-C samples after the first irradiation experiment, i.e. in non-sealed conditions, due to drying effects supported by high ventilation in the irradiation chamber. In sealed conditions, some smaller surface cracks also appeared probably due to radiolysis of water present in the material, however they did not have any effects on the integrity of the internal structure of the pastes observed by non-destructive measurements. Compressive strength was enhanced by irradiation in all cases, only flexural strength decreased due to the presence of surface cracks. It should be noted that surface cracks appeared also on non-irradiated NP_C samples when left on air to dry. Therefore, further development of the cement composites will be focused on the elimination of any volume changes due to drying.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Project

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

Continuities

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

Publication year

2020

Confidentiality

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

Name of the periodical

Progress in Nuclear Energy

ISSN

0149-1970

e-ISSN

—

Volume of the periodical

127

Issue of the periodical within the volume

September

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

1-10

UT code for WoS article

000571796000005

EID of the result in the Scopus database

2-s2.0-85087917145