Response of Refractory Cement Based Composite to Gradual Temperature Loading

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00322810" target="_blank" >RIV/68407700:21110/18:00322810 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.3311/PPci.11080" target="_blank" >http://dx.doi.org/10.3311/PPci.11080</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3311/PPci.11080" target="_blank" >10.3311/PPci.11080</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Response of Refractory Cement Based Composite to Gradual Temperature Loading

Popis výsledku v původním jazyce

This paper deals with the experimental study of the response of refractory concrete mixture to gradual thermal loading, up to 1000 degrees C. A binding system based on calcium aluminate cement (CAC) modified by the partial replacement of metakaolin was used. Short ceramic fibers were applied in a dose of 4% by volume in the studied mixture. Material transformations due to thermal loading were monitored in terms of residual mechanical, fracture and basic physical properties-compressive strength, flexural strength, fracture energy, dynamic modulus of elasticity, and bulk density in the study. The results obtained corresponded well with the mineral transformations monitored using the thermogravimetric analysis performed on the binder paste. Residual values of compressive and flexural strength were approximately 40% of the initial values after exposure to a temperature of 1000 degrees C; however, the dominant part of the total loss was monitored up to 400 degrees C, due to decomposition of the hydrates. Fiber employment contributed considerably to the resistance against thermal loading up to 400 degrees C, which was demonstrated by the fracture energy results (a loss of 25% was monitored). An additional increase of the temperature load led to micro crack propagation, which was obvious in the results of dynamic modulus of elasticity determination, in which the short fiber incorporation was noticeably limited.

Název v anglickém jazyce

Response of Refractory Cement Based Composite to Gradual Temperature Loading

Popis výsledku anglicky

This paper deals with the experimental study of the response of refractory concrete mixture to gradual thermal loading, up to 1000 degrees C. A binding system based on calcium aluminate cement (CAC) modified by the partial replacement of metakaolin was used. Short ceramic fibers were applied in a dose of 4% by volume in the studied mixture. Material transformations due to thermal loading were monitored in terms of residual mechanical, fracture and basic physical properties-compressive strength, flexural strength, fracture energy, dynamic modulus of elasticity, and bulk density in the study. The results obtained corresponded well with the mineral transformations monitored using the thermogravimetric analysis performed on the binder paste. Residual values of compressive and flexural strength were approximately 40% of the initial values after exposure to a temperature of 1000 degrees C; however, the dominant part of the total loss was monitored up to 400 degrees C, due to decomposition of the hydrates. Fiber employment contributed considerably to the resistance against thermal loading up to 400 degrees C, which was demonstrated by the fracture energy results (a loss of 25% was monitored). An additional increase of the temperature load led to micro crack propagation, which was obvious in the results of dynamic modulus of elasticity determination, in which the short fiber incorporation was noticeably limited.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Kumulativní časově závislé procesy ve stavebních materiálech a konstrukcích</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Periodica Polytechnica-Civil Engineering

ISSN

0553-6626

e-ISSN

—

Svazek periodika

62

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

HU - Maďarsko

Počet stran výsledku

6

Strana od-do

670-675

Kód UT WoS článku

000432604200014

EID výsledku v databázi Scopus

2-s2.0-85048214508