Mechanical Properties of Refractory Composites with Granulated Ceramic Fibers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F16%3A00301484" target="_blank" >RIV/68407700:21110/16:00301484 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical Properties of Refractory Composites with Granulated Ceramic Fibers

Popis výsledku v původním jazyce

This paper deals with the experimental study of aluminous cement-based composites with applications of granulated ceramic fibers and different types of aggregates. The studied composites were developed for high temperature applications, thus the response to gradual temperature loading was carried out in the experimental program (up to 600 °C and 1000 °C). An evaluation was performed in order to determine the final and residual values of the bulk density and mechanical properties – flexural and compressive strength. Used granulated ceramic fibers were applied in doses of 0.5 %, 1.0 %, 2.0 %, 4.0 % and 8.0 % by volume. The influence of aggregate types was investigated for each dosage of fibers. Natural basalt, crushed fireclay, and expanded glass were selected as a fillers of constant volume for the mixtures. The results obtained confirmed the essential impact of fiber application, predominantly on the increase of flexural strength. However, flexural strength was not increased linearly with fiber dosage. An application dose of 8.0 % of fibers by volume was not an efficient solution, because of only minimal improvement. Additionally, an extreme dosage of ceramic fibers reduced the values of bulk density and the proportional values of compressive strength for all studied combinations of aggregates. The optimal dosage seems to be 4.0 % by volume. Bulk density was reduced after the temperature loading by 5 %, resp. 10 % due to microstructural changes, but mixtures with ceramic fibers exhibited slightly better stability.

Název v anglickém jazyce

Mechanical Properties of Refractory Composites with Granulated Ceramic Fibers

Popis výsledku anglicky

This paper deals with the experimental study of aluminous cement-based composites with applications of granulated ceramic fibers and different types of aggregates. The studied composites were developed for high temperature applications, thus the response to gradual temperature loading was carried out in the experimental program (up to 600 °C and 1000 °C). An evaluation was performed in order to determine the final and residual values of the bulk density and mechanical properties – flexural and compressive strength. Used granulated ceramic fibers were applied in doses of 0.5 %, 1.0 %, 2.0 %, 4.0 % and 8.0 % by volume. The influence of aggregate types was investigated for each dosage of fibers. Natural basalt, crushed fireclay, and expanded glass were selected as a fillers of constant volume for the mixtures. The results obtained confirmed the essential impact of fiber application, predominantly on the increase of flexural strength. However, flexural strength was not increased linearly with fiber dosage. An application dose of 8.0 % of fibers by volume was not an efficient solution, because of only minimal improvement. Additionally, an extreme dosage of ceramic fibers reduced the values of bulk density and the proportional values of compressive strength for all studied combinations of aggregates. The optimal dosage seems to be 4.0 % by volume. Bulk density was reduced after the temperature loading by 5 %, resp. 10 % due to microstructural changes, but mixtures with ceramic fibers exhibited slightly better stability.

Druh

O - Ostatní výsledky

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/GAP104%2F12%2F0791" target="_blank" >GAP104/12/0791: Vláknové kompozity na bázi cementu pro vysokoteplotní aplikace</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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