NANOINDENTATION OF ALKALI-ACTIVATED FLY ASH

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

NANOINDENTATION OF ALKALI-ACTIVATED FLY ASH

Popis výsledku v původním jazyce

Low calcium ground fly ash was activated with a sodium-silicate solution and cured under ambient and heat conditions. Nanoindentation was employed for the characterization of reaction product, mainly alumino-silicate gel (N-A-S-H gel). Samples were indented by series of grids consisting hundreds of indents each. The intrinsic Young's modulus of N-A-S-H gel was found to be around the mean value 17.7 GPa, regardless on the curing procedure. Other characteristic phases were also identified, namely partly-activated slag, non-activated slag and fly ash particles. Results of pore size distributions measured by mercury intrusion porosimetry (MIP) were systematically observed depending on the curing procedure. Additional measurements with the same methodologywere carried out on cement paste samples. The synthetized N-A-S-H gel was found to be mechanically very close to C-S-H gels in matured cement pastes.

Název v anglickém jazyce

NANOINDENTATION OF ALKALI-ACTIVATED FLY ASH

Popis výsledku anglicky

Low calcium ground fly ash was activated with a sodium-silicate solution and cured under ambient and heat conditions. Nanoindentation was employed for the characterization of reaction product, mainly alumino-silicate gel (N-A-S-H gel). Samples were indented by series of grids consisting hundreds of indents each. The intrinsic Young's modulus of N-A-S-H gel was found to be around the mean value 17.7 GPa, regardless on the curing procedure. Other characteristic phases were also identified, namely partly-activated slag, non-activated slag and fly ash particles. Results of pore size distributions measured by mercury intrusion porosimetry (MIP) were systematically observed depending on the curing procedure. Additional measurements with the same methodologywere carried out on cement paste samples. The synthetized N-A-S-H gel was found to be mechanically very close to C-S-H gels in matured cement pastes.

Druh

D - Stať ve sborníku

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

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

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název statě ve sborníku

Nanotechnology in Cement and Concrete

ISBN

978-0-309-14276-2

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

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Název nakladatele

Transportation Research Board

Místo vydání

Washington

Místo konání akce

Irvine

Datum konání akce

5. 5. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000277673200008