Spraying unit for unhardened concrete and the like

摘要

The present invention relates to a spraying unit for unhardened concrete and the like, which is provided with an apparatus capable of mixing a constant quantity of quick-set additive, for example, into unhardened concrete to be sprayed. The apparatus capable of mixing the constant quantity of quick-set additive into unhardened concrete and the like is adapted to usually carry and supply the constant volumetric weight and quantity of quick-set additive outside a quick-set additive container regardless of the amount of the quick-set additive stored inside the container.