Alkali-activated fly ash foams ? synthesis, chemo-physical properties and microstructure modeling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F14%3A00221387" target="_blank" >RIV/68407700:21110/14:00221387 - 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

Alkali-activated fly ash foams ? synthesis, chemo-physical properties and microstructure modeling

Popis výsledku v původním jazyce

Inorganic foams offer several unique properties such as low thermal conductivity, fire resis- tance, or UV stability. Inorganic foam specimens were synthesized from fly ash and aluminium powder through an alkali-activation process. Depending on mix proportions, bulk densities ranged between 400 and 800 kg/m 3 . Thermal treatment at 80 ° C for 12 hours accelerated curing process. Compressive strength was found in the range 4.5-9.0 MPa, flexural strength 0.6-1.7 MPa, Young's modulus 0.6-1.1 GPa, thermal conductivity 0.14-0.16 W/m/K and thermal capacity around 1100 J/kg/K. Exposing the foams to temperature 800 ° C led to a small decrease of compressive strength while exposure to 1100 ° C sintered the foam to higher strength of 13 MPa. Volumetric shrinkage20% occurred at 1100 ° C with- out further disintegration. Residual compressive strength was determined after exposure to NaCl, HCl, Na 2 SO 4 , MgSO 4 , H 2 SO 4 . The highest reduction to 20% occured in both acids with pH=2 after one y

Název v anglickém jazyce

Alkali-activated fly ash foams ? synthesis, chemo-physical properties and microstructure modeling

Popis výsledku anglicky

Inorganic foams offer several unique properties such as low thermal conductivity, fire resis- tance, or UV stability. Inorganic foam specimens were synthesized from fly ash and aluminium powder through an alkali-activation process. Depending on mix proportions, bulk densities ranged between 400 and 800 kg/m 3 . Thermal treatment at 80 ° C for 12 hours accelerated curing process. Compressive strength was found in the range 4.5-9.0 MPa, flexural strength 0.6-1.7 MPa, Young's modulus 0.6-1.1 GPa, thermal conductivity 0.14-0.16 W/m/K and thermal capacity around 1100 J/kg/K. Exposing the foams to temperature 800 ° C led to a small decrease of compressive strength while exposure to 1100 ° C sintered the foam to higher strength of 13 MPa. Volumetric shrinkage20% occurred at 1100 ° C with- out further disintegration. Residual compressive strength was determined after exposure to NaCl, HCl, Na 2 SO 4 , MgSO 4 , H 2 SO 4 . The highest reduction to 20% occured in both acids with pH=2 after one y

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Advances in Science and Technology

ISSN

1662-0356

e-ISSN

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Svazek periodika

92

Číslo periodika v rámci svazku

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Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

6

Strana od-do

14-19

Kód UT WoS článku

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EID výsledku v databázi Scopus

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