A method for determining the particle emission coefficient of a material, including the following steps: a) collecting by sieving a predetermined mass of fines of a material; b) for each among a plurality of masses of said fines, said masses being different from each other, carrying out the following operations: b1) disposing a considered mass of said fines in an enclosure; b2) causing, by injecting an incoming air flow into the enclosure, particles to be airborne from said fines and to be ejected out of the enclosure in an outgoing air flow; b3) measuring, as a function of time, a visibility and a particle mass concentration in the outgoing air flow and calculating, from said measurements, a maximum particle mass concentration (PM_max) in the outgoing air flow, and a time necessary for the visibility to become equal to a visibility before the particles become airborne, called total particle ejection time (D_Ej); c) calculating normalized values (PM_max_norm) of the maximum particle mass concentrations and of the total particle ejection times (D_Ej_norm) by dividing said values of maximum particle concentration and of total particle ejection time that are measured in step b) respectively by the maximum value of maximum particle concentration and the maximum value of total particle ejection time, the maximum value of maximum particle concentration being the largest value of maximum particle concentration and the maximum value of total particle ejection time being the largest value of total particle ejection time, for all the series of measurement that are made at step b); d) calculating, from the normalized values (PM_max_norm, D_Ej_norm) of maximum particle concentration and of total particle ejection time, a slope of a trend-line representative of the function providing the normalized maximum particle concentration (PM_max_norm) as a function of the normalized particle ejection time (D_Ej_norm); e) calculating the particle emission coefficient of the material as being equal to a value of a monotonic function of the slope of the trend-line. a) collecting by sieving a predetermined mass of fines of a material; b) for each among a plurality of masses of said fines, said masses being different from each other, carrying out the following operations: b1) disposing a considered mass of said fines in an enclosure; b2) causing, by injecting an incoming air flow into the enclosure, particles to be airborne from said fines and to be ejected out of the enclosure in an outgoing air flow; b3) measuring, as a function of time, a visibility and a particle mass concentration in the outgoing air flow and calculating, from said measurements, a maximum particle mass concentration (PM_max) in the outgoing air flow, and a time necessary for the visibility to become equal to a visibility before the particles become airborne, called total particle ejection time (D_Ej); b1) disposing a considered mass of said fines in an enclosure; b2) causing, by injecting an incoming air flow into the enclosure, particles to be airborne from said fines and to be ejected out of the enclosure in an outgoing air flow; b3) measuring, as a function of time, a visibility and a particle mass concentration in the outgoing air flow and calculating, from said measurements, a maximum particle mass concentration (PM_max) in the outgoing air flow, and a time necessary for the visibility to become equal to a visibility before the particles become airborne, called total particle ejection time (D_Ej); c) calculating normalized values (PM_max_norm) of the maximum particle mass concentrations and of the total particle ejection times (D_Ej_norm) by dividing said values of maximum particle concentration and of total particle ejection time that are measured in step b) respectively by the maximum value of maximum particle concentration and the maximum value of total particle ejection time, the maximum value of maximum particle concentration being the largest value of maximum particle concentration and the maximum value of total particle ejection time being the largest value of total particle ejection time, for all the series of measurement that are made at step b); d) calculating, from the normalized values (PM_max_norm, D_Ej_norm) of maximum particle concentration and of total particle ejection time, a slope of a trend-line representative of the function providing the normalized maximum particle concentration (PM_max_norm) as a function of the normalized particle ejection time (D_Ej_norm); e) calculating the particle emission coefficient of the material as being equal to a value of a monotonic function of the slope of the trend-line.