| 摘要 |
A system which designs concrete to have desired rheological properties and multiple embodiments of a concrete profile measuring unit. The system includes a concrete plant, the measuring unit and a mix changing unit. The concrete profile measuring unit measures a rheological profile of the concrete produced by the plant and the mix changing unit receives the measured rheological profile and a desired rheological profile defining desired properties of the concrete and indicates to the plant to adjust the proportions of the solid components and the water of the concrete mix, as many times as necessary, in order to produce concrete which has a rheological profile which is compatible with the desired rheological profile. The measuring unit includes a surface in contact with a part of a mass of the concrete mix, a shearing unit for effecting shear deformation in the mass and at least one sensor which senses a measure of the force which is transferred to the surface by the concrete mass as a result of the shear deformation. The rheological profile is produced by a) sensing at least one measure of the force which is transferred to the suface under at least two different stress states, b) determining i) the sensitivity of each of the at least one measure to a change in stress state and ii) the workability of the mix and c) creating the rheological profile from at least the sensivity and the workability. |
