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The adsorption isotherm of water on ettringite was determined by an automatic microelectronic thermobalance. The adsorptive behavior of water on ettringite was analyzed by the experimental results.A modified Langmuir model of adsorption was used and the isotherm equation was derived. A characteristic equation for adsorption of water on ettringite was obtained by simulation with experimental data. Each adsorption isotherm at temperature 10-40 ℃could be derived conveniently from the characteristic equation.
The adsorption isotherm of water on ettringite was determined by an automatic microelectronic thermobalance. The adsorptive behavior of water on ettringite was analyzed by the experimental results. A modified Langmuir model of adsorption was used and the isotherm equation was derived. A characteristic equation for adsorption of water on ettringite was obtained by simulation with experimental data. Each adsorption isotherm at temperature 10-40 ° C could be derived conveniently from the characteristic equation.