a mixing and delivery machine for flowable materials having on - site and towable mobility for mixing , hydrating , and delivering an admixture such as cementious mix , concrete , binder , graveled sand , mold sand and various other mixtures via an extended auger and elevatable hopper is used to facilitate both loading and releasing the hopper contents into the feed end of the auger . the auger is driven by a primemover and a wheel set on the machine facilitates the raising and lowering of the delivery end of the mixing auger .