Physical and chemical chloride binding characteristics of the hydration products for phosphoaluminate cement

Fengnian Wu,Haifeng Bi, Haiqian Lin,Xuping Wang,Congqi Luan,Xin Cheng,Shoude Wang,Yongbo Huang

CONSTRUCTION AND BUILDING MATERIALS（2023）

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摘要

•Phosphoaluminate cement hydrates exhibit excellent chloride binding capacity.•Chemically bound chloride due to hydration products accounted for up to 80%•C(A,P)H10 and C2(A,P)H8 chemically bind with chloride to Friedel's salt.•Al(OH)3 and Fe(OH)3 gels bind the chloride by weak physical adsorption.•Freundlich and Elovich models fits well for chloride binding of PAC hydrates.

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关键词

Chloride binding,Phosphoaluminate cement,Hydration products,Binding isotherm,Kinetic model

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