A ready-mixed composition and a pre-mix composition for the production of a concrete material containing sequestered carbon dioxide, a CO.sub.2-containing water used in such compositions, dry-batch and wet-batch processes for sequestering carbon dioxide in concrete material, general method and process for sequestering carbon dioxide in hardening concrete, system and ready-mixed truck to perform such processes and methods for the production of a ready-to-cure carbonated concrete. Compositions comprise a concrete mixture and a CO.sub.2-containing water. The CO.sub.2-containing water comprising water and at least one of blended CO.sub.2 gas bubbles, dissolved H.sub.2CO.sub.3, carbonate ions (CO.sub.3.sup.2−), bicarbonate ions (HCO.sup.3−), nanosized alkaline earth metal carbonate and nanosized alkali metal carbonate particles. The concrete mixture comprises a cementitious material, aggregates and at least one CO.sub.2-sequestering chemical for accelerating a CO.sub.2 sequestration speed and maximizing the captured amount of the carbon dioxide.

At least one embodiment relates to a concrete mixing truck includes a chassis, a front axle and a rear axle coupled to the chassis, a lift axle coupled to the chassis and including a tractive element, a lift actuator coupled to the lift axle, a mixing drum rotatably coupled to the chassis, a fill level sensor coupled to the mixing drum and configured to provide a signal indicative of a fill level of a material within the mixing drum, and a controller. The lift axle is selectively repositionable between a lowered position in which the tractive element engages a support surface and a raised position. The controller is operatively coupled to the lift actuator and the fill level sensor and configured to control the lift actuator to reposition the lift axle into the lowered position in response to the fill level exceeding a threshold fill level.

A vehicle includes an engine, a drum, a drum drive system, and a control system coupled to the engine and the drum drive system. The drum drive system includes a pump and a motor. The pump is mechanically coupled to the engine and configured to pump a fluid through a hydraulic system. The pump has a variable pump displacement. The motor is fluidly coupled to the pump by the hydraulic system and positioned to drive the drum to agitate the drum contents. The motor has a variable motor displacement. The control system is configured to receive pressure data indicative of a pressure of the fluid within the hydraulic system, reduce the variable motor displacement in response to the pressure of the fluid being less than a threshold system pressure, and reduce a speed of the engine based on the reduction of the variable motor displacement.

An onboard washing system provides the ability to wash specific areas at the rear of a concrete truck, without requiring an operator to climb a ladder or climb on the truck. Certain specified areas which are traditionally difficult to wash, including the inside of the charge hopper, the interior portions of the discharge chute, and rear portions of the mixing drum structure, can now be washed in an automated and efficient manner. The truck-mounted washing system has components which are specifically positioned to cause washing fluid (water) to be sprayed or directed toward predetermined areas in an efficient and effective manner. The system also includes hand-held washing wands or washing mechanisms, which allow an operator to easily reach additional zones or additional areas at the rear of the truck, which are lower. Most significantly, the truck-mounted wash systems and the hand-held nozzle systems (wand) are all operable while an operator remains on the ground.

A concrete mixer system includes a control system configured to provide a first input to a drum drive system to rotate a drum of a concrete mixer at a target speed while the drum is empty and clean, acquire operating data regarding an operating characteristic of the drum drive system to determine a baseline operating characteristic of the drum drive system in response to the first input, provide a second input to the drum drive system to rotate the drum at the target speed following one or more uses of the concrete mixer and while the drum is empty, acquire the operating data to determine a current operating characteristic of the drum drive system in response to the second input, and provide a buildup notification indicating that there is a buildup of drum contents within the drum in response to a difference between the baseline operating characteristic and the current operating characteristic exceeding a threshold differential.

A device for monitoring the delivery of the loading of a mixer truck including an agitating vessel is disclosed. The monitoring device comprising a housing with at least one gyroscope and/or at least one accelerometer mounted in the housing and supplying data, and means for fastening the housing on the mixer truck, wherein said fastening means are configured to removably fasten the housing on the agitating vessel of the mixer truck.

A vehicle includes a chassis, an engine, a drum assembly, and a control system. The drum assembly includes a drum configured to receive drum contents and a drive system coupled to the drum. The drive system is configured to rotate the drum to agitate the drum contents. The control system is configured to operate the drive system at a drive speed; receive data comprising at least one of (i) a drum speed command from a remote monitoring system, (ii) a signal from a mixture sensor configured to acquire mixture data indicative of a current property of the drum contents, (iii) the current property of the drum contents from the remote monitoring system, and (iv) an initial property of the mixture from at least one of a batching system, the mixture sensor, and a user input device; and adjust the drive speed of the drum based on the data.

A ready-mixed composition and a pre-mix composition for the production of a concrete material containing sequestered carbon dioxide, a CO.sub.2-containing water used in such compositions, dry-batch and wet-batch processes for sequestering carbon dioxide in concrete material, general method and process for sequestering carbon dioxide in hardening concrete, system and ready-mixed truck to perform such processes and methods for the production of a ready-to-cure carbonated concrete. Compositions comprise a concrete mixture and a CO.sub.2-containing water. The CO.sub.2-containing water comprising water and at least one of blended CO.sub.2 gas bubbles, dissolved H.sub.2CO.sub.3, carbonate ions (CO.sub.3.sup.2−), bicarbonate ions (HCO.sup.3−), nanosized alkaline earth metal carbonate and nanosized alkali metal carbonate particles. The concrete mixture comprises a cementitious material, aggregates and at least one CO.sub.2-sequestering chemical for accelerating a CO.sub.2 sequestration speed and maximizing the captured amount of the carbon dioxide.

A mixing drum assembly includes a frame, a mixing drum rotatably coupled to the frame, and a charge hopper coupled to the frame and positioned to direct material into the mixing drum. The charge hopper includes a hopper frame and a liner extending along an inner surface of the hopper frame and at least partially defining a passage extending between an inlet and an outlet. The hopper frame includes a first material and the liner includes a second material different from the first material. The liner is removably coupled to the hopper frame.

A mixing drum includes a body defining a head aperture and a discharge aperture opposite the head aperture, a head coupled to the body and extending across the head aperture, and a mixing element positioned within the volume and coupled to the body. The head and the body define a volume. The body is formed from at least a first section and a second section. The first section overlaps the second section.