Phosphogypsum-based materials(PBM)were synthesized with varied phase compositions of phosphogypsum,portland cement and fly ash.Effects of fractal growth characteristics on physicochemical prop-erties,pore structure,compressive strength,as well as the hydration behaviour and mineralogical conversion of mortars were examined by a multitechnological approach,including mercury intrusion porosimetry,rietved phase analysis,thremal analysis,calorimetry and Fourier transforminfrared spectroscopy analysis.Expermental results indicate that the specimens cured with mosite resulted in higher strength and lower porosity compared with those cured in the drying chamber.In addition,a more complicated course of the aluminate and silicate reactions during the hydration process has been published,with the hydration products mainly consisting of calcium silicate hydrate(C-S-H),portlandite,ettringite,hemicarbonate,monocarboaluminate,calcite,quartz,a mixed AFm passed with carbonate,and hydroxide.After all,the nucleation process is a reaction that can be de-fined as a solid,liquid and gaseous phases that goes through the four stages of materialization mixing and modi-fication,i e,hydration of low calcium content,secondary hydration,high calcium condensation and geoplymen-sation,respectively.The rupture,recombination,polymerization reactions of Si-O,Ca-O,Al-O bonds contribute to the nucleation mechanism that serves as the formation of C-S-H in hydration products.

HOU Jiaojiao;NI Xiaoyang;LUO Xin

Faculty of Engineering,China University of Geosciences,Wuhan 430074,China;College of Chinese Language and Literature,Wuhan University,Wuhan 430072,China

武汉理工大学学报（材料科学版）（英文版）

[1]HOU Jiaojiao;NI Xiaoyang;LUO Xin-.Analysis of the Fractal Growth Characteristics and Nucleation Mechanism of Phosphogypsum-based Materials)[J].武汉理工大学学报（材料科学版）（英文版）,2022(05):863-875

Phosphogypsum,portland,multitechnological,rietved,thremal,transforminfrared,Expermental,mosite,hemicarbonate,monocarboaluminate,materialization,geoplymen

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