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    • 1. 发明授权
    • System and means for selectively mixing concrete and incorporating dry additives therein
    • 选择混合混合物并加入干燥添加剂的系统和方法
    • US3623708A
    • 1971-11-30
    • US3623708D
    • 1969-04-01
    • IRL DAFFIN ASSOCIATES
    • FUTTY ROBERT CKUGLE JOHN L
    • B28C9/04B28C7/04
    • B28C9/0463
    • A novel system and means for selectively mixing concrete and incorporating dry additives therein is disclosed. The basic raw materials for the concrete itself are supplied, in dry form, from a truck into an auxiliary mixing trough associated with the truck. Dry, solid additives, preferably in granular form, although finer modulus material may also be used, are then incorporated into the concrete batch being prepared in the mixing trough for the purposes of imparting antifreeze, water-reduction, and/or coloring properties to the selected batch. A novel apparatus is utilized for delivering the dry additives to the concrete batch, the novel apparatus incorporating a hopper assembly into which the dry additives are placed. The hopper assembly contains a unique mixing agitator means for mixing and breaking up the dry additive ingredients. Disposed below the mixing agitator means is a controlled feed means which selectively controls the amount of dry additives passed out from the hopper into a lateral conveyor means which preferably comprises an enclosed, auger arrangement. The dry additives, in selective and controlled portions, are conveyed by the auger arrangement into the auxiliary mixing trough whereupon such dry additives are incorporated into the concrete batch.