The present invention is an improved washout pan and method for using it that automatically induces stress at the materials-pan surface interface to induce release of cement-containing materials by the nature of the construction of the washout pan and its response to being moved from a horizontal to a vertical position. The composition of the invention washout pan is critical to the objects of the invention, in that it is preferably formed of polypropylene in a rotomolding process as a single piece with a general overall shape of a box with a slurry body capacity of from 100 to 300 gallons.

A dual container concrete mixing transport truck chute washout system with (a) a chute attachable funnel container having an open mouth with an upper rim, an attachment for detachably attaching the funnel container below an exit end of a concrete truck concrete chute, and a material outlet connector to drain liquid and debris from the funnel container, and (b) a truck mountable holding container having an upper portion that is adapted to store the funnel container when the funnel container is not affixed to the chute, a lower portion for collection of fluid and solid materials, a seat located between the upper space and the lower portion, a material inlet connector, and a fluid drain valve for draining fluid from the holding container, wherein the upper rim of the funnel container is adapted to sit on the seat of the holding container to act as a lid.

An apparatus for a lorry-based concrete mixer is described. The apparatus comprises a vessel adapted to be positioned beneath a concrete mixer discharge chute portion, the vessel comprising a vessel body, the vessel body defining a vessel inlet and a vessel outlet, the vessel inlet being adapted to receive debris and fluid exiting the chute discharge portion, and the vessel outlet being adapted to permit debris and fluid stored in the vessel body to be discharged from the vessel body. There is a direct line of sight for a user through the vessel inlet to the vessel outlet.

An apparatus (10) for a lorry-based concrete mixer (12) is described. The apparatus (10) comprises a vessel (14) adapted to be positioned beneath a concrete mixer discharge chute portion (16), the vessel (14) comprising a vessel body (18), the vessel body (18) defining a vessel inlet (20) and a vessel outlet (22), the vessel inlet (20) being adapted to receive debris and fluid exiting the chute discharge portion (16), and the vessel outlet (22) being adapted to permit debris and fluid stored in the vessel body (18) to be discharged from the vessel body (18). There is a direct line of sight (24) for a user (26) through the vessel inlet (20) to the vessel outlet (22).

A concrete mixing transport truck chute washout system with a container unit with an upper region located above and fluidly communicating with a lower region, the upper region having a container unit sealing and seating feature, the upper region having a container unit open mouth, and a rack unit that receives the container portion and which can have a stationary portion and a movable portion.

A concrete mixing transport truck chute washout system with (a) a container unit with an upper region located above and fluidly communicating with a lower region, the upper region having a container unit sealing and seating feature, the upper region having a container unit open mouth, (b) a drainage valve positioned on the lower region of the container portion, and (c) a tray unit that detachably fits in the upper region of the container unit in the container unit open mouth, wherein the tray unit has a bottom with at least one opening formed therein and a tray unit sealing and seating feature, which tray unit sealing and seating feature engages with the container unit sealing and seating feature when the tray unit is placed in the upper region of the container unit.