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

作　　者：Jin Yang Yong Huang Xingyang He Ying Su Tao Huang Bohumír Strnadel 

机构地区：[1]School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan,430068,China [2]Building Waterproof Engineering and Technology Research Center of Hubei Province,Hubei University of Technology,Wuhan,430068,China [3]Center of Advanced Innovation Technologies,VŠB-Technical University of Ostrava,70833 Ostrava-Poruba,Czech Republic

出　　处：《Particuology》2024年第11期109-119,共11页颗粒学报（英文版）

基　　金：supports from the National Natural Science Foundation of China(grant Nos.U23A20560,52172017);the Key Research and Development Program of Hubei Province(grant No.2022BCA071);the Wuhan Science and Technology Bureau(grant No.2022020801020269).

摘　　要：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 3.1μm 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 1.1–3.1μm can be an important basis for judging the reactivity of wet-milled FA as ultrafine supplementary cementitious materials.

关 键 词：Wet-milling Liquid-solid system Grey correlational analysis Fly ash Ultrafine supplementary cementitious MATERIALS 

分 类 号：TB34[一般工业技术—材料科学与工程]