Table 4-2. Physical characteristics of the M919 concrete mobile mixer unit.
HANDLING AND TRANSPORTATION
Concrete consistency depends on the placing conditions, but handling and transporting methods can affect its
consistency. Therefore, if placing conditions allow a stiff mix, choose equipment that can handle and transport
such a mix without affecting its consistency. You must carefully control each handling and transporting step to
maintain concrete uniformity within a batch, and from batch to batch, so that the completed work is consistent
Figure 4-5 shows several right and wrong ways to handle concrete to prevent segregation
of the aggregates and paste. Segregation causes honeycomb concrete or rock pockets. Segregation