Abstract

The method can determine a density of concrete based on the measured buoyancy of a buoy immersed in fresh concrete contained in a ready mix drum and rotatable therein as the drum is rotated, the method can include obtaining a first measurement of a force applied to the buoy while the buoy is being moved tangentially in the fresh concrete, obtaining a second measurement of a force applied to the buoy while the buoy is being moved tangentially in the fresh concrete by rotation of the cylindrical wall, obtaining an indication of the buoyancy of the buoy in the concrete including factoring out the yield effect based on at least the first measurement and the second measurement.

IPC Classes  ?

• G01N 9/10 - Investigating density or specific gravity of materialsAnalysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials
• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass
• G01N 9/26 - Investigating density or specific gravity of materialsAnalysing materials by determining density or specific gravity by measuring pressure differences
• G01N 9/14 - Investigating density or specific gravity of materialsAnalysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers the body being built into a container
• B28C 7/02 - Controlling the operation of the mixing
• B28C 5/42 - Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
• G01N 9/08 - Investigating density or specific gravity of materialsAnalysing materials by determining density or specific gravity by measuring buoyant force of solid materials by weighing both in air and in a liquid
• G01N 9/36 - Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture

Abstract

The temperature of concrete can be monitored by a temperature probe. Typically, large volumes of concrete such as are typically carried in mixer trucks or mixed in industrial concrete production drums have a relatively stable, or slowly varying temperature, given the high thermal capacity of concrete. A sudden change in temperature can thus be attributed to an external event. A sudden addition of even a relatively small amount of water for instance, which has an even higher thermal capacity, can produce a notable sudden change in temperature. Examples where the detection of the addition of water can be particularly useful in the production and/or transport of concrete are provided herein. Moreover, if the temperature of the added water is known, and the quantity of concrete is also known, the sudden difference in temperature can be correlated to a volume of added water.

IPC Classes  ?

• B28C 5/42 - Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
• B01F 15/02 - Feed or discharge mechanisms
• B01F 3/12 - Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed liquids with solids
• B01F 15/00 - Accessories for mixers
• B01F 13/00 - Other mixers; Mixing plant, including combinations of dissimilar mixers
• B28C 7/02 - Controlling the operation of the mixing
• B28C 7/04 - Supplying or proportioning the ingredients
• B28C 7/12 - Supplying or proportioning liquid ingredients
• G01N 33/38 - ConcreteLimeMortarGypsumBricksCeramicsGlass

Abstract

The probe can include a base and a resistance member extending from the base and onto which a resistance pressure is imparted by a rheological substance when the resistance member is submerged and moved therein. Rheological properties can be obtained using values indicative of the resistance pressure both in a low speed range and in a high speed range.

IPC Classes  ?

• B28C 7/00 - Controlling the operation of apparatus for producing mixtures of clay or cement with other substancesSupplying or proportioning the ingredients for mixing clay or cement with other substancesDischarging the mixture
• G01N 11/14 - Investigating flow properties of materials, e.g. viscosity or plasticityAnalysing materials by determining flow properties by moving a body within the material by using rotary bodies, e.g. vane
• B28C 7/02 - Controlling the operation of the mixing
• G01N 11/00 - Investigating flow properties of materials, e.g. viscosity or plasticityAnalysing materials by determining flow properties