发明名称 |
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. |
申请公布号 |
EP2831562(B1) |
申请公布日期 |
2016.11.30 |
申请号 |
EP20130722483 |
申请日期 |
2013.03.29 |
申请人 |
LAFARGE |
发明人 |
ROY, CÉDRIC;LOMBOIS-BURGER, HÉLÈNE;BLACHIER, CHRISTIAN;JUGE, CÉDRIC;TOUSSAINT, FABRICE |
分类号 |
G01N3/28;B28C5/00;B28C7/02;G01N11/00;G01N11/14;G01N11/16;G01N33/38 |
主分类号 |
G01N3/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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