Characterization and mechanical properties of non-cement binder based on Czech coal combustion by-products

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43918810" target="_blank" >RIV/60461373:22310/19:43918810 - 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

Characterization and mechanical properties of non-cement binder based on Czech coal combustion by-products

Popis výsledku v původním jazyce

This investigation was focused on the preparation and characterization of non-cement binder based on Czech ashes produced by brown coal power plants. Furthermore, some mechanical properties were measured to confirm its potential use in the construction industry. First, sulfocalcic ashes (SC ash, mostly called FBC ash) and their hydrated products were studied. A ternary binder (TB) was prepared using a pulverized coal combustion fly ash (PCC FA), sulfocalcic ash, Ca(OH)2 and a superplasticizer. Quantitative XRD analysis was used to determine the amount of amorphous phase by Rietveld method using an internal standard. The XRD mineralogy of the ternary binder was ettringite, quartz, mullite accompanied by minority phases as CaCO3, Ca(OH)2, anhydrite AII, hematite and TiO2. C-A-S-H phase (Al substituted tobermorite) was found in the ternary binder by SEM/EDX method and by MAS NMR analysis. Mechanical properties, especially the values of compressive strength, obtained from the ternary binder were comparable to that of Portland cement (PC). It was found the hydrated ternary binder exhibits a long-term resistance to the action of aggressive solutions of salts. The ternary binder seems to be a perspective economic material in comparison to PC for utilization in the construction industry.

Název v anglickém jazyce

Characterization and mechanical properties of non-cement binder based on Czech coal combustion by-products

Popis výsledku anglicky

This investigation was focused on the preparation and characterization of non-cement binder based on Czech ashes produced by brown coal power plants. Furthermore, some mechanical properties were measured to confirm its potential use in the construction industry. First, sulfocalcic ashes (SC ash, mostly called FBC ash) and their hydrated products were studied. A ternary binder (TB) was prepared using a pulverized coal combustion fly ash (PCC FA), sulfocalcic ash, Ca(OH)2 and a superplasticizer. Quantitative XRD analysis was used to determine the amount of amorphous phase by Rietveld method using an internal standard. The XRD mineralogy of the ternary binder was ettringite, quartz, mullite accompanied by minority phases as CaCO3, Ca(OH)2, anhydrite AII, hematite and TiO2. C-A-S-H phase (Al substituted tobermorite) was found in the ternary binder by SEM/EDX method and by MAS NMR analysis. Mechanical properties, especially the values of compressive strength, obtained from the ternary binder were comparable to that of Portland cement (PC). It was found the hydrated ternary binder exhibits a long-term resistance to the action of aggressive solutions of salts. The ternary binder seems to be a perspective economic material in comparison to PC for utilization in the construction industry.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/FV30062" target="_blank" >FV30062: Možnosti využití deponovaných popílků z uhelných elektráren</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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