Mechanism and kinetics of binding of meat and bone meal ash into the Portland cement clinker

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26232511%3A_____%2F19%3AN0000059" target="_blank" >RIV/26232511:_____/19:N0000059 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s42452-020-2215-4" target="_blank" >https://link.springer.com/article/10.1007/s42452-020-2215-4</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Mechanism and kinetics of binding of meat and bone meal ash into the Portland cement clinker

Popis výsledku v původním jazyce

Meat and bone meal (MBM) is the alternative fuel with good calorific value used in cement production. The main problem with MBM combustion in a cement kiln is the high content of P2O5, which incorporates in clinker phases, influencing phase composition of clinker and hence the quality of the cement. In cement industry, only limited amount of MBM is burned to prevent adverse effect. P2O5 has a significantly negative effect on the formation of the main clinker phase alite and it stabilizes belite by means of entering its structure. At 4.5 wt% P2O5 in the clinker, the alite formation is completely blocked. Research on kinetics of reactions between clinker and MBM proved reduction of negative reactions and minimization of migration of P2O5 into the clinker minerals using undispersed P2O5 carrier. The carrier in pellet form eliminates the negative effect of P2O5 on the formation of the alite. The research was conducted by means of XRD, optical and electron microscopy. Electron microanalysis showed that P2O5 migrated inside the clinker to a distance of less than 250 μm from the ash and clinker interface. Clinker was not influence outside this area. It is possible to prepare high quality cement from the clinker containing ash residues from MBM in an amount corresponding to up to 10 wt% P2O5. The work was completed with preparation of cement with 7 wt% of P2O5, which exhibited good technological properties. In addition, these cements significantly reduce the leachability of toxic elements.

Název v anglickém jazyce

Mechanism and kinetics of binding of meat and bone meal ash into the Portland cement clinker

Popis výsledku anglicky

Meat and bone meal (MBM) is the alternative fuel with good calorific value used in cement production. The main problem with MBM combustion in a cement kiln is the high content of P2O5, which incorporates in clinker phases, influencing phase composition of clinker and hence the quality of the cement. In cement industry, only limited amount of MBM is burned to prevent adverse effect. P2O5 has a significantly negative effect on the formation of the main clinker phase alite and it stabilizes belite by means of entering its structure. At 4.5 wt% P2O5 in the clinker, the alite formation is completely blocked. Research on kinetics of reactions between clinker and MBM proved reduction of negative reactions and minimization of migration of P2O5 into the clinker minerals using undispersed P2O5 carrier. The carrier in pellet form eliminates the negative effect of P2O5 on the formation of the alite. The research was conducted by means of XRD, optical and electron microscopy. Electron microanalysis showed that P2O5 migrated inside the clinker to a distance of less than 250 μm from the ash and clinker interface. Clinker was not influence outside this area. It is possible to prepare high quality cement from the clinker containing ash residues from MBM in an amount corresponding to up to 10 wt% P2O5. The work was completed with preparation of cement with 7 wt% of P2O5, which exhibited good technological properties. In addition, these cements significantly reduce the leachability of toxic elements.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Proceedings ICSBM 2019 (2nd International Conference on Sustainable Building Materials), Volume 4 (Waste recovery, treatments and valorization),

ISSN

2523-3971

e-ISSN

2523-3971

Svazek periodika

2

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

165-177

Kód UT WoS článku

000517978900096

EID výsledku v databázi Scopus

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