Liquid-solid grinding system: Grinding kinetics of coal fly ash as ultrafine supplementary cementitious materials

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F24%3A10255390" target="_blank" >RIV/61989100:27360/24:10255390 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1674200124001494" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1674200124001494</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.partic.2024.07.022" target="_blank" >10.1016/j.partic.2024.07.022</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Liquid-solid grinding system: Grinding kinetics of coal fly ash as ultrafine supplementary cementitious materials

Popis výsledku v původním jazyce

Wet-milling in liquid-solid system can achieve ultra-fine mechanical dissociation of solid wastes with low energy consumption, thereby efficiently improving the potential pozzolanic reactivity. However, the wet-milling kinetics of ultrafine dissociation in liquid-solid system has not been fully investigated. This paper systematically investigates the wet-milling kinetics of fly ash (FA). Results showed that before wet-milling of FA for 360 min, no agglomeration effect was observed. The particle dissociation of FA during wet-milling can be divided into three stages: rapid dissociation, slow dissociation and stabilization. The evolution process of particle size distribution during wet-milling is consistent with the Rosin-Rammler-Bennet distribution. Both the particle uniformity coefficient and fractal dimension showed highly positive linear correlation with the strength activity index of wet-milled FA. The grey correlation analysis showed that FA particles between 1.1 and 3.1 μm had the greatest impact on both the early and late strength activity index. Simultaneously, D10 of wet-milled FA has the largest impact on strength activity index at each age, while D100 has the least impact. Therefore, D10 and proportion of particles in 1.1-3.1 μm can be an important basis for judging the reactivity of wet-milled FA as ultrafine supplementary cementitious materials. (C) 2024

Název v anglickém jazyce

Liquid-solid grinding system: Grinding kinetics of coal fly ash as ultrafine supplementary cementitious materials

Popis výsledku anglicky

Wet-milling in liquid-solid system can achieve ultra-fine mechanical dissociation of solid wastes with low energy consumption, thereby efficiently improving the potential pozzolanic reactivity. However, the wet-milling kinetics of ultrafine dissociation in liquid-solid system has not been fully investigated. This paper systematically investigates the wet-milling kinetics of fly ash (FA). Results showed that before wet-milling of FA for 360 min, no agglomeration effect was observed. The particle dissociation of FA during wet-milling can be divided into three stages: rapid dissociation, slow dissociation and stabilization. The evolution process of particle size distribution during wet-milling is consistent with the Rosin-Rammler-Bennet distribution. Both the particle uniformity coefficient and fractal dimension showed highly positive linear correlation with the strength activity index of wet-milled FA. The grey correlation analysis showed that FA particles between 1.1 and 3.1 μm had the greatest impact on both the early and late strength activity index. Simultaneously, D10 of wet-milled FA has the largest impact on strength activity index at each age, while D100 has the least impact. Therefore, D10 and proportion of particles in 1.1-3.1 μm can be an important basis for judging the reactivity of wet-milled FA as ultrafine supplementary cementitious materials. (C) 2024

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/EH22_008%2F0004631" target="_blank" >EH22_008/0004631: Materiály a technologie pro udržitelný rozvoj</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Particuology

ISSN

1674-2001

e-ISSN

—

Svazek periodika

94

Číslo periodika v rámci svazku

94

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

109-119

Kód UT WoS článku

001295574500001

EID výsledku v databázi Scopus

2-s2.0-85201084213