公开(公告)号：US20170158568A1

公开(公告)日：2017-06-08

申请号：US15316433

申请日：2015-06-04

Applicant: LAFARGE

Inventor： Hélène LOMBOIS-BURGER ,  Christian BLACHIER ,  Sylvain DUCHAND ,  Cédric ROY

IPC: C04B38/10 ,  C04B28/14 ,  C04B28/04

CPC classification number: C04B38/106 ,  C04B28/02 ,  C04B28/04 ,  C04B28/14 ,  C04B2111/00198 ,  C04B22/002 ,  C04B40/0028

Abstract: A method for producing a mineral foam includes: (i) independently preparing a cement slurry and an aqueous foam, the cement slurry being prepared by mixing water E and cement C, the cement C including a soluble equivalent quantity x of Na2O, x being expressed by weight for 100 parts cement, the slurry having a ratio x/(E/C) less than or equal to 1.75, E/C being expressed by weight, and the particles of cement C having a size distribution such that the particle size distribution ratio dmax(h/2)/dmin(h/2) is between 5 and 25; (ii) bringing the cement slurry into contact with the aqueous foam in order to obtain a foamed cement slurry; and (iii) shaping the foamed cement slurry obtained in step (ii) and allowing setting to take place.

公开(公告)号：US20150336290A1

公开(公告)日：2015-11-26

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

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 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.

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，包括使所述容器以至少两个不同的转速进行转动; 根据以下关系式，确定混合物的旋转驱动转矩C，混凝土的剪切应力τ和混凝土的速度梯度值（点（y）}），τ= T（ω）·C {dot over（γ）} = G（ω）·ω其中T和G是预定函数; 基于确定的值，通过外推和/或近似，根据速度梯度{dot over（γ）}确定剪切应力τ的变化关系; 并根据变化的关系提供混凝土的可使用性参数的指示。