A volumetric mixer control system for a mobile volumetric mixer for controlling a mix recipe produced by the mobile volumetric mixer. The control system on the mobile volumetric mixer has a programmable logic controller, electronic control units for controlling flow control devices, and a controller area network for controlling the mixer control system. A mobile electronic device connects the controller area network on the mobile volumetric mixer to a remote terminal for providing a control signal to the mobile electronic device to control the mix produced by the volumetric mixer.

To provide a lighter weight and more robust component for use on a concrete mixer truck, a collector is formed of a non-metallic material which has more desirable characteristics. The collector is further strengthened by providing internal reinforcing structures and reinforced mounting structures so the collector can be effectively coupled to the concrete mixer truck. Additionally, the non-metallic material has desirable characteristics, such as low surface friction levels, high strength to weight ratios, and desirable puncture resistance. All of these characteristics combine to provide a lighter weight, more effective collector.

A system features an acoustic sensor configured to mount on a wall of a mixing drum, sense an acoustic characteristic of a mixture of a slurry, including concrete, contained in a mixing drum when rotating, and provide acoustic sensor signaling containing information about the acoustic characteristic sensed; and a signal processor configured to receive the acoustic sensor signaling, and determine corresponding signaling containing information about a slump characteristic of the mixture of concrete contained in the mixing drum, based upon the signaling received.

A mixing drum drive includes first, second, and third rotational speed reduction stages, an electric motor having a length similar to its diameter, a component for fastening the electric motor, and a bearing by which a component for fastening a mixing drum is rotatable. A component with a gear of the first rotational speed reduction stage is configured to be driven by the electric motor and a further component with a gear of the first rotational speed reduction stage drives a component with a gear of the second rotational speed reduction stage. A further component with a gear of the second rotational speed reduction stage drives a component with a gear of the third rotational speed reduction stage and a further component with a gear of the third rotational speed reduction stage drives the component for fastening the mixing drum.

A vehicle CO.sub.2 capture and utilization system includes a concrete mixer vehicle and a vehicle exhaust capture system. The concrete mixer vehicle comprises a vehicle exhaust and a mixer tank. The vehicle exhaust capture system is located onboard the concrete mixer vehicle. Additionally, the vehicle exhaust capture system includes one or more fluid pathways that fluidly couple the vehicle exhaust and the mixer tank.

A vehicle CO.sub.2 capture and utilization system includes a concrete mixer vehicle and a vehicle exhaust capture system. The concrete mixer vehicle comprises a vehicle exhaust and a mixer tank. The vehicle exhaust capture system is located onboard the concrete mixer vehicle. Additionally, the vehicle exhaust capture system includes one or more fluid pathways that fluidly couple the vehicle exhaust and the mixer tank.

An apparatus (1) for producing fluid concrete comprising: a first mixer (100) configured to mix at least water (A1) and cement (C) so as to make a low fluidity concrete (2), having consistency class S2, a truck mixer configured to mix the low fluidity concrete (2) with further water (A2) so as to make a fluid concrete (3) having consistency class S2, a water supply means and at least a cement supply means configured so that said apparatus (1) can produce fluid concrete (3), a control and adjustment unit (4), connected to the water supply means and at least to the cement supply means, configured to selectively control and adjust the introduction of water (A1) and cement (C) into the first mixer (100) and the introduction of further water (A2) into the cement mixer.

A system features a combination of an acoustic sensor and a communication transmitter. The acoustic sensor is arranged on a rotating container or drum having a slurry contained therein, including concrete, and configured to provide an acoustic signal to sense an acoustic signal containing information about a characteristic of the slurry, and provide acoustic sensor signaling containing information about the acoustic signal sensed. The communication transmitter is arranged on the rotating container or drum, and configured to receive the acoustic signal, and provide the acoustic signal received from the rotating container or drum for further processing.

A concrete transit mixer can include a cabin having four doors for people to enter and exit the cabin, and a rotatable drum for mixing and pouring concrete. The mixer can include a water tank mounted below the cabin and a fuel tank mounted below the cabin. The mixer can include four distinct sets of steps to allow people to climb up to each of the four doors to enter the cabin.

Some implementations herein described improvements to concrete products and processes for producing concrete products that may provide a positive environmental impact and that can be stronger relative to the percent of cement used. Particular examples include improvements to zero-slump to near-zero-slump concrete mixture design, material storage and handling, batching, mixing, sequencing and curing processes, as well as forming and curing techniques.