Ternary binder incorporating CFBC fly ash: microstructure evolution and micromechanical strength predictions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00307580" target="_blank" >RIV/68407700:21110/17:00307580 - 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

Ternary binder incorporating CFBC fly ash: microstructure evolution and micromechanical strength predictions

Popis výsledku v původním jazyce

Fly ash from circulating fluidized bed combustion (CFBC) can be utilized in a ternary binder system which exhibits hydraulic properties. The studied ternary binder consists of CFBC fly ash, conventional fly ash and Ca(OH)2 activator [1]. The paste yields compressive strength 32 MPa after 28 days of standard sealed curing. Volumetric evolution of phases during hydration were quantified using XRD analysis, differential thermal gravimetry, porosimetry and electron microscopy. A four-scale micromechanical model spanning nm-mm scales was employed to predict evolution of compressive strength [2], taking into account active contribution of C-S-H and ettringite on strength gain. Experimental and micromechanical model open a way for further optimization and utilization of such sulphur-rich energetic by-products with long-term volume stability. [1] P. Hlava'cek, R. Sulc, V. Smilauer, Ch. Ro"ßler, R. Snop: Ternary binder made of CFBC fly ash, conventional fly ash, and calcium hydroxide: phase and strength evolution. Submitted to Cement and Concrete Composites, 2016. [2] M. Hlobil, V. Šmilauer, G. Chanvillard: Micromechanical multiscale fracture model for compressive strength of blended cement pastes. Cement and Concrete Research, 2016, vol. 83, p. 188-202.

Název v anglickém jazyce

Ternary binder incorporating CFBC fly ash: microstructure evolution and micromechanical strength predictions

Popis výsledku anglicky

Fly ash from circulating fluidized bed combustion (CFBC) can be utilized in a ternary binder system which exhibits hydraulic properties. The studied ternary binder consists of CFBC fly ash, conventional fly ash and Ca(OH)2 activator [1]. The paste yields compressive strength 32 MPa after 28 days of standard sealed curing. Volumetric evolution of phases during hydration were quantified using XRD analysis, differential thermal gravimetry, porosimetry and electron microscopy. A four-scale micromechanical model spanning nm-mm scales was employed to predict evolution of compressive strength [2], taking into account active contribution of C-S-H and ettringite on strength gain. Experimental and micromechanical model open a way for further optimization and utilization of such sulphur-rich energetic by-products with long-term volume stability. [1] P. Hlava'cek, R. Sulc, V. Smilauer, Ch. Ro"ßler, R. Snop: Ternary binder made of CFBC fly ash, conventional fly ash, and calcium hydroxide: phase and strength evolution. Submitted to Cement and Concrete Composites, 2016. [2] M. Hlobil, V. Šmilauer, G. Chanvillard: Micromechanical multiscale fracture model for compressive strength of blended cement pastes. Cement and Concrete Research, 2016, vol. 83, p. 188-202.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

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

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

EuroCoalAsh 2017

ISBN

978-80-214-5469-9

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

82-86

Název nakladatele

Brno University of Technology

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

6. 2. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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