tub mixer

open-top mixer

A mixer filled through an opening at its top; for concrete, usually a pan or drum within which mixing blades revolve about the vertical axis; for mortar, usually a trough within which mixing paddles revolve about the horizontal axis.
References in periodicals archive ?
A Stewarts 30' Stock Trailer 2007 PS20,200; JD 6320 Tractor 2003 PS17,800; BVL Twin Tub Mixer Wagon PS14,000.
The US trial used two different types of diet feed mixers - a Keenan Mech-Fibre which incorporated the PACE system, and its various protocols for including feeds and recommended times for mixing, and a vertical tub mixer with its advanced weigh system and incorporated protocols.
Shower or bath tub mixers with complex controls often mean that a person only notices that something is wrong with the temperature when it is already too late.