A mobile cement batch mixing plant includes at least one slurry tank, a cement storage tank, at least one slurry pump and at least one clean pump supported on a transportable frame. The slurry tanks and cement storage tank are connected by a plumbing system. The flow of water and cement slurry between the tanks and within the plumbing system is controlled by a series of valves and pump controls. A cement slurry is formed by adding water and cement to the slurry tank through a fluid vortex within the slurry tank. The cement slurry can be pumped out of the slurry tank into a well.

The invention relates to a computer-aided method and a device for controlling a concrete mixing plant for the production of ready-mixed concrete (1) or mixed concrete, which is mixed at least from the components cement (6a; 6b) and aggregates (8a, 8b, 8c) with the addition of water (9) in a motor-driven mixer unit (3), wherein at least the required mixing time (t.sub.M) of the mixer unit (3) is calculated before the start of the mixing process by means of an electronic prognosis unit (10), which calculates the current moisture (F), measured by means of at least one moisture sensor (11), of at least the aggregates (8a, 8b, 8c) to be added and the temperature measured by means of at least one temperature sensor (12;13;14) or thermal imaging camera, in order to determine the required mixing time (t.sub.M) of the mixer unit (3) on the basis of a predetermined concrete formulation (18), taking into account the various measured values determined by the sensors.

The invention relates to a computer-aided method and a device for controlling a concrete mixing plant for the production of ready-mixed concrete (1) or mixed concrete, which is mixed at least from the components cement (6a; 6b) and aggregates (8a, 8b, 8c) with the addition of water (9) in a motor-driven mixer unit (3), wherein at least the required mixing time (t.sub.M) of the mixer unit (3) is calculated before the start of the mixing process by means of an electronic prognosis unit (10), which calculates the current moisture (F), measured by means of at least one moisture sensor (11), of at least the aggregates (8a, 8b, 8c) to be added and the temperature measured by means of at least one temperature sensor (12;13;14) or thermal imaging camera, in order to determine the required mixing time (t.sub.M) of the mixer unit (3) on the basis of a predetermined concrete formulation (18), taking into account the various measured values determined by the sensors.

A method is for manufacturing elements including hydraulic binder and aggregates. The method includes mixing a dry mortar composition including hydraulic binder and aggregates with water, to form a wet mortar. The method also includes pumping and conveying the wet mortar towards an outlet. During the conveying at least two physical properties of the wet mortar are measured on-line. The physical properties include viscosity and at least one of flow and density.

A load measurement system for a mixer comprising a mixing drum configured to contain and mix concrete, a cradle adjacent to the mixing drum and configured to receive the mixing drum, and a load measurement device adjacent to the cradle and configured to determine the changes to a material property of the cradle due to the force exerted on the cradle by the load in the mixing drum. The load measurement system determines the amount of the load of concrete in the mixing drum based on the measured change to the material property of the cradle, which may include one or more of a material deformation, displacement, stress, strain, or the vibration of the cradle.

Asphalt mixing plant, comprising a mixing drum and a temperature monitoring system, the temperature monitoring system comprising a temperature sensor configured for contactless measurement of a material temperature of an asphalt mix to obtain at least a first temperature value for at least a first point of time, where the temperature sensor is arranged at an area of an output of the mixing drum or at a discharge chute of the mixing drum; and an operation and monitoring unit and a remote server; whereby the operation and monitoring unit is configured to wirelessly transmit the at least first temperature value to the remote server via a wireless communication interface unit.

Asphalt mixing plant, comprising a mixing drum and a temperature monitoring system, the temperature monitoring system comprising a temperature sensor configured for contactless measurement of a material temperature of an asphalt mix to obtain at least a first temperature value for at least a first point of time, where the temperature sensor is arranged at an area of an output of the mixing drum or at a discharge chute of the mixing drum; and an operation and monitoring unit and a remote server; whereby the operation and monitoring unit is configured to wirelessly transmit the at least first temperature value to the remote server via a wireless communication interface unit.

An apparatus (100) for the production of a plaster slurry is described, the apparatus (100) comprising a mixer (102) for mixing at least plaster and water to form a plaster slurry, the mixer (102) comprising an outlet conduit (122), a foam generator (106) for mixing at least air, a foaming agent and water to produce a foam, the foam generator (106) in fluid communication with the mixer (102) via a fluid pathway (116) comprising a foam conduit (117); and a mass flow meter (124), wherein the mass flow meter (124) is configured to measure the density and mass flow rate of the foam within the foam conduit (117) or the plaster slurry within the outlet conduit (122). Additionally, a method of manufacturing a plaster slurry is described.

The invention provides methods and compositions for treating wash water from concrete production with carbon dioxide. The treated wash water can be reused as mix water in fresh batches of concrete.

The invention provides methods and compositions for treating wash water from concrete production with carbon dioxide. The treated wash water can be reused as mix water in fresh batches of concrete.