| 摘要 |
A batch mixer for mixing concrete materials into a mixed concrete includes a mixing drum having a plurality of paddles fixed to the drum for rotation with the mixing drum about the longitudinal axis of the mixing drum. The paddles include mixing paddles oriented to urge the concrete materials away from the outlet opening at the second end of the drum when the mixing drum is rotated in the mixing direction, and at least one shearing paddle which is oriented at less than 25 degrees from the longitudinal direction of the mixing drum. The shearing paddles has a main body portion interrupted by shearing apertures through which concrete material are directed and an inner edge which is discontinuous and interrupted by longitudinally spaced teeth. |
