Study on the Curing Mechanism of Ferronickel Slag Powdered Cement Soil
To study the mechanism of using nickel-iron slag powder as a solidification material for ce-ment soil,the microscopic properties of nickel-iron slag powder cement soil were deeply studied to more accurately reveal the physical and chemical changes during the solidification process.The size distribu-tion of nickel-iron slag powder and cement was analyzed by laser particle size test,and it was found that the dispersion and average particle size of nickel-iron slag powder were slightly smaller than that of ce-ment.The internal structure of nickel-iron slag powder cement soil was studied by synchronous thermal analysis experiment,which showed that nickel-iron slag powder filled the pores of cement soil,improved the degree of intergranular bonding,and thus improved its compressive strength.The microscopic experiment by scanning electron microscope(SEM)showed that a moderate amount of nickel-iron slag powder was beneficial to enhance the dynamic and static strength of cement soil,and the strength of ce-ment soil also increased further with the increase of curing age.
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