Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 355
the batch type.Mixing paddles, on two shafts, revolve in opposite directions, and theconcrete falls through a trap door in the bottom of the machine. Inthe continuous type the materials should be put in at the upper endso as to be partially mixed dry. The water is supplied near themiddle of the…
Architecture · Building
Internet Archive · Kelly Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
