Application of secondary calcined shale in the design of low-cement binder for thermal-resistant composites

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00362403" target="_blank" >RIV/68407700:21110/23:00362403 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.ceramint.2022.12.220" target="_blank" >https://doi.org/10.1016/j.ceramint.2022.12.220</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2022.12.220" target="_blank" >10.1016/j.ceramint.2022.12.220</a>

Result language

angličtina

Original language name

Application of secondary calcined shale in the design of low-cement binder for thermal-resistant composites

Original language description

This paper deals with the possibility of partial replacement of aluminate cement in refractory concretes with waste material from calcined shale production. The waste “metashale” was combined with super-reactive alumina and boehmite powder in order to design a low-cement binder for high-temperature-resistant composites. Designed binders were studied at ambient temperature as well as after exposures to temperatures of 400 °C, 1000 °C and 1400 °C. Firstly, blended binder-based pastes were observed in an electron microscope to determine structural changes in the material, while XRD and DSC characterization was performed as well for determining phase compositions and their changes. Metashale application lead to the creation of different C-A-S-H phases, which were found to be contributing to the higher temperature resistance of designed binders. The further monitored parameters were basic physical and mechanical properties and thermal strain. Despite that the application of metashale caused an increase of porosity at an ambient temperature, the designed low cement binder showed more stable properties during the temperature exposures. Considering the reached properties and the environmental aspects, the most promising mixture was found to be the one, with metashale and cement in a 60:40 ratio. This binder was used to prepare refractory. Because it reached substantially better performance compared to the pure calcium aluminate-based composite, the designed binder proved its applicability.

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

—

OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/GA20-00653S" target="_blank" >GA20-00653S: Physical and chemical processes in low-cement heat resistant composites</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Ceramics International

ISSN

0272-8842

e-ISSN

1873-3956

Volume of the periodical

49

Issue of the periodical within the volume

9

Country of publishing house

IT - ITALY

Number of pages

17

Pages from-to

13452-13468

UT code for WoS article

000966435600001

EID of the result in the Scopus database

2-s2.0-85148762230