METHOD FOR CONTROLLING AN WORKABILITY PARAMETER IN A CONCRETE MIXER

摘要

A method for controlling at least one workability parameter of a concrete contained in the container of a mixer with a non vertical rotational axis, includes making the container turn at at least two different rotational speeds; determining, for each of the rotational speeds, a rotary drive torque C of the container, a value of shear stress τ of the concrete and a speed gradient value {dot over (γ)} of the concrete according to the following relationships: τ=T(ω)·C {dot over (γ)}=G(ω)·ω where T and G are predetermined functions; determining a relationship of variation of the shear stress τ according to the speed gradient {dot over (γ)} by extrapolation and/or approximation based on the determined values; and providing an indication of the workability parameter of the concrete based on the relationship of variation.