公开(公告)号：US09511510B2

公开(公告)日：2016-12-06

申请号：US14389263

申请日：2013-03-29

Applicant: LAFARGE

Inventor： Cedric Roy ,  Helene Lombois-Burger ,  Christian Blachier ,  Cedric Juge ,  Fabrice Toussaint

IPC: B28C7/02 ,  B28C5/00 ,  G01N11/14 ,  G01N33/38 ,  G01N11/00

CPC classification number: B28C7/02 ,  B28C5/006 ,  G01N11/14 ,  G01N33/383 ,  G01N2011/0046

Abstract: 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 least 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 r of the concrete and a speed gradient γ of the concrete according to the following relationships: τ=T(ω)·C and γ=G(ω). ω where T and G are predetermined functions; determining a relationship of variation of shear stress τ according to the speed gradient γ by extrapolation and/or approximation from the determined values; and providing an indication of the workability parameter of the concrete based on the relationship variation.

Abstract translation: 一种用于控制包含在具有非垂直旋转轴的混合器的容器中的混凝土的至少一个可加工性参数的方法，包括使所述容器至少转动至少两个不同的转速; 根据以下关系，确定容器的旋转驱动转矩C，混凝土的剪切应力r和混凝土的速度梯度γ，τ= T（ω）·C和 γ= G（ω）。 ω其中T和G是预定函数; 根据确定的值通过外推和/或近似来确定根据速度梯度γ的剪切应力τ的变化关系; 并根据关系变化提供混凝土的可加工性参数的指示。