Abstract: An apparatus for continuous production of finished foam material, in which the proportions of the constituents are monitored and continuously adjustable during operation of the machine. The liquid components are metered by positive-displacement, progressive-cavity, screw-type pumps driven by variable speed motors. Rates of flow are monitored by flow meters, and the relative proportions of the constituents can be closely adjusted by varying the speeds of the pump drive motors and observing the flow meter readouts. The finished foam produced by the apparatus may be used, for example, for the preparation of foamed cement grouts or for fighting fires.

Abstract: An apparatus for high capacity production of high-fluidity, colloidally mixed cement slurry. Water and cement dust are combined at metered rates by a premixing assembly which discharges into a mixing tub. The high-speed, high-shear pump recirculates the material through the tub to produce the colloidally-mixed slurry. The high-fluidity slurry may be provided to a second pump, preferably of the positive-displacement, progressive-cavity, rotor-stator type, for supplying the slurry at a metered rate. Finished foam material may also be provided to the slurry metering pump at the metered rate, so the materials are mixed to form a foamed cement grout in which the weight and quality of the material is precisely adjustable.

Abstract: A batching module for a mobile batching plant includes an open three dimensional frame with first and second end cells defined therein and a third intermediate cell defined between the end cells. A plurality of interchangeable batching apparatus are provided for removable installation within the cells. A reversible conveyor is mounted within the frame and extends between the ends thereof to convey materials deposited thereon from the batching apparatus to either the first or second end of the frame. Length extensible support legs are mounted to the batching apparatus frame to permit selective height adjustment of the frame above the ground. The legs are telescopically mounted within vertical hollow support posts of the frame for selective retraction completely within the frame posts. Either mobile mixers or stationary mixers may be positioned under the first and second cells to receive product from the batchers and conveyor.

Abstract: A concrete mixing system includes reservoirs of liquid additives, where the additives are combined with concrete mix to add desired properties thereto. These reservoirs of liquid additive are connected to a storage chamber and a controller which controls and sequences various pumps, valves and sensors to attain the desired quantity of liquid additive for introduction to the concrete mix. The sensors measure pressure in the storage chamber, which the controller correlates to the volume therein for later mixing with the concrete mix. In situations where a back pressure in the chamber is a concern, a sensing tube is employed within the chamber. A differential pressure transducer, which has one sensor within the sensing tube and one sensor within the chamber, accurately determines the pressure and thus the volume received within the storage chamber. A modified sensing tube can also be employed to increase the sensitivity and the accuracy of the pressure measurement within the sensing tube.

Abstract: In a concrete pump for wet spraying, in which standard concrete is pumped to a mixing jet, compressed air and if necessary a hardening accelerant are mixed into the concrete stream, which is applied with the jet and compressed; it is the purpose of the invention in its initial version on the one hand to minimize the fine dust yield at the jet, on the other hand to guarantee the availability of the amount of compressed air needed for the wet spraying process, characterized by a regulating section (20) in which the capacity of the concrete pump (1) forms a standard volume for monitoring the amount of compressed air flowing to the mixing jet (3) in such a way that the relationship of the amount of compressed air mixed in per unit of time to the amount of concrete pumped in per unit of time corresponds to a desired value which produces the smallest fine dust yield when the concrete is applied.

Abstract: A method of controlling a continuous multi-component slurrying process at an oil or gas well comprises continuously flowing substances for creating a slurry in response to a slurry flow rate factor and continuously flowing another substance for the slurry in response to a flow rate of at least a predetermined one of the other substances or the slurry itself. The method can include density control, slurry (tub) level control, and a combination of such controls. The method can operate in either closed loop or open loop manner, and control can be effected with either of two types of control signals depending on whether the controlled device is an integrating or non-integrating type. The method can also provide for bumpless transition between manual and automatic control.

Abstract: A batcher plant for producing ready-mixed concrete is miniaturized by disposing, side by side on a trestle, a cement-paste making unit with cement measuring means and a stationary cement-paste mixer and an aggregate processing unit with fine and coarse aggregate receptacles. Cement paste prepared by the cement-paste making unit is admitted from the cement-paste mixer into a mixing drum of a truck mixer independently of admission of mixed fine and coarse aggregates quantitatively measured by the aggregate receptacles, so that the loading of concrete materials in the truck mixer can be effectively carried out without loss of efficiency caused by waiting time.

Abstract: An asphaltic mix batch apparatus which comprises a tower which mounts a number of aggregate storage bins, a weigh hopper underlying the storage bins, and a pugmill underlying the weigh hopper. Also, a screen assembly is positioned above the bins for segregating the aggregate by size, and such that the initial bin receives the more fine aggregate and the subsequent bins receive the more coarse aggregate. The initial bin has a relatively wide open top, and it receives a relatively broad gradation of the aggregate from its front to its back, with the front being disproportionately fine and the back being disproportionately coarse. A divider plate is positioned in the initial bin to prevent the gradation from interfering with the free discharge of the aggregate when the associated discharge port is opened, and to thereby provide a more uniform gradation being withdrawn through the discharge port.

Abstract: A molding sand preparation apparatus of the mixing-bowl type is suitable for preparing face sand or back sand without structural modification. The apparatus includes sand hoppers and resin and catalyst tanks as well as pumps, controls and the like for measuring proper amounts of sand, resin and catalyst and placing them into a mixing bowl equipped with rotatable agitating blades. The bowl includes flexible mixing blades, the position of which can be adjusted for changing the mixing efficiency of the apparatus.

Abstract: A system which includes method and apparatus for the delivery of cementitious materials to a construction site using a transportable machine, a truck with an extensible crane, a containment frame, and transport cement silos that are carried by the truck and used to replenish cement. The machine has a frame with extensible legs and includes a cement storage and conveyor means having an agitator to assure the delivery of cement of uniform consistency to a batch mixer that has arms to rotate mix in a rotational loop. A water storage and conveyor means utilizes a constant head of water, a solenoid operated valve and a manually operated adjustment means to assure the delivery of water at a uniform flow rate to the batch mixer means. Sand of uniform density and consistency is delivered by a belt conveyor having a compression plate to compress the sand to a uniform density.

Abstract: An apparatus and a process for mixing water from a pressurized source and an additive or admixture for a cementitious composition in a mixing chamber comprising introducing, in the form of a jet, water under a first pressure, which is above atmospheric pressure, and introducing the additive under a second pressure between atmospheric pressure and the first pressure, the amount of the additive that is introduced to the mixing chamber being controlled by means regulated by the pressure of water.

Abstract: In a device for metering at least two fluid reaction components into a mixing chamber, flexible displacement elements (1, 2; 47, 48, 49, 50) are provided in each container chamber (43, 44, 45, 46) which divide each container chamber (43, 44, 45, 46) into a component chamber (12, 13; 51, 52, 53, 54;) and a hydraulic chamber (16, 17; 55, 56, 57, 58), whereby the flexible displacement element (1, 2; 47, 48, 49, 50) for each component is acted on by a hydraulic flow which can be pre-specified and also regulated during the metering procedure in its magnitude and duration by a control-regulation device (3 or 4).

Abstract: Process and apparatus are provided to distribute specified, premixed quantities of dry mortar mix and cement to a construction site. Bulk bags and a hopper apparatus are transported to the construction site and utilized with a forklift and a mixer device. The hopper apparatus is adjustably assembled and is constructed and arranged to be hand operable to efficiently meter homogeneous predetermined quantities of the mixture out of a discharge chute. The premixed contents in the bulk bags are dumped into the hopper apparatus and discharged in metered quantities into the mixer device. A water dispensing structure is provided to discharge a predetermined volume into the mixer device to form mortar or concrete for use.

Abstract: A novel process and apparatus for discharging, on a batch basis, cement and water as a slurry or in the form of separate discharges of slurry and cement, where the materials so discharged contain a predetermined amount of water and a predetermined amount of cement, is disclosed. A major quantity of water and all or a major quantity of the cement is mixed in a slurry mixer to produce a primary slurry. A major portion of the primary slurry is then discharged, and the remaining slurry mixed with the remaining quantity of water for discharge as a second slurry. A minor portion of the cement can optionally be added to a dry chamber for discharge therefrom. The slurry mixer and dry chamber, which are substantially closed systems, can be vented together, and then vented to atmosphere, so that air in the slurry mixer which is displaced during water and cement charging flows through the dry chamber.

Abstract: An improved silo and delivery system for efficiently handling dry mortar-blend compositions at construction sites is disclosed. Mortar-blend compositions are premixed to desired specifications and packaged at remote mixing stations into large bag containers that are transported to the construction site. A silo designed for uniquely servicing batch mixers is provided at the construction site for storing the premixed composition. The bag contents are emptied into the silo and are sealed therein against exposure to environmental elements. The silo contents are discharged by means of simple gravity flow on a batch-need basis into a batch mixer operatively underlying the silo.

Abstract: A method of mixing particulate cement and water in a primary mixing vessel to form a slurry batch, includes introducing a measured quantity of water into the vessel, introducing a measured quantity of particulate cement into the vessel, agitating the water and cement in the vessel to form a slurry, and while continuing such agitating, pumping slurry from the lower interior extend of the vessel and delivering the pumped slurry to the upper interior of the vessel, at high velocity, removing slurry from the vessel for flow to an auxiliary mixing vessel for mixing with aggregate, and employing wash water to wash remanent slurry from surfaces in the primary mixing vessel for flow to the auxiliary vessel.

Abstract: Disclosed are a method of and an apparatus for producing a heated reproduction asphalt mixture, in which a new material and a normal-temperature waste material, the water content of which is set at a limited range of values, are adapted to be mixed together in the ratio of (90 to 40):(10 to 60) in terms of weight. The temperature of heating the new material by means of a dryer is controlled to range from 190.degree. C. to 350.degree. C. so as to be in conformity with the above mixing weight ratio. Both the materials are mixed and kneaded together in a mixer at a kneading temperature of 150.degree. C. or more. The gas generated within the mixer is exhausted toward a chimney in a state wherein the amount exhausted is made adjustable.

Abstract: A continuous soil mixing apparatus including a series of soil feed hoppers and a mixing chamber, all supported over an elongated, endless, single conveyor belt to carry layers of soil of different compositions from the different feed hoppers to the mixing chamber. The first soil hopper remote from the mixing chamber incorporates a soil agitator and deposits its soil directly upon the conveyor belt, while the remaining hoppers incorporate independent feed belts above the conveyor belt.

Abstract: A modular skid frame for supporting cement pumping equipment includes three interlockable sections which, when assembled, define two longitudinal support members and a plurality of transverse support members. One end of the skid formed by one of the interlockable sections is adapted to break down into two lateral subsections. A sleeve-like interfit is provided between joined members and bolt and bracket means are provided to disengageably secure adjacent endwise aligned support members together. The pumping equipment is arranged to maximize maintainability and transportability by positioning one engine on each lateral subsection at one end of the skid and having one pump on each of the other two interlockable sections. A displacement tank is supported on the skid above the pumps. The skid and equipment can be particularly adapted to operate with numerous kinds of off-skid mixing equipment.

Abstract: A method and apparatus for blending particulate materials in which a plurality of blending chambers receive, by a series of installments, pre-mixed ingredients so as to ensure that each blending chamber contains an average sample. The blending chambers are then discharged in sequence to provide an output as a series of sub-batches which each comprise the predetermined proportions of ingredients.

Abstract: A cement mobile mixer for mixing concrete from sand, aggregate, cement and water.

Abstract: Process and apparatus for the preparation of a mix composed of mineral fibers and of inorganic hydraulic binders in particle or liquid form. A bale of fibers is continuously defibrated. The fibers are continuously conveyed to the input end of a screw type conveyor-mixer. Binders are continuously added to the fibers during their travel. The resulting mix is discharged at the outlet end of the screw type conveyor-mixer.

Abstract: A process for the preparation and immediate use in situ of ready to use blends of structural material, such as plaster, mortar, stucco, tile adhesive or similar blends, which, in contrast to the usual methods does not use as a raw material a dry mixture of the three main components binder, filler and additives. Instead a dry mix of binder and filler is prepared at the building site, and an aqueous solution of the additives is added in a separate mixing operation, immediately followed by the application in situ of the finished blend. This method avoids the difficulties associated with the use of dry mixtures containing all three components. The invention includes an apparatus for mixing and immediate application of the blends as defined by the process claims.

Abstract: A method of preparing foundry sand by measuring moisture and compressibility includes the steps of determining a set of desired characteristics for compressibility and for moisture in accordance with a particular clay content, measuring the actual compressibility in a first stage early in the processing of the foundry sand, adding moisture in accordance with the difference between the moisture for the measured compressibility and the moisture for the desired compressibility to bring the foundry sand to a predetermined value in accordance with the assumed set of characteristics, making a second measurement of the compressibility in a second stage as a countercheck near the conclusion of the processing, measuring the difference between the actual compressibility at the second stage and the desired compressibility, and employing such difference as a correcting value to adjust the calibration of the first measuring stage.

Abstract: A new and improved mixer apparatus is especially adapted for use in a program controlled system for making foundry molds and includes a mixing device for dispensing a mixture of molding sand and binder onto a mold forming pattern in a flask. The device includes a mixing chamber having an inlet for receiving sand adjacent an upper level and a discharge outlet for dispensing a mixture adjacent a lower level. A rotor is mounted on a central axis of the chamber and includes an elongated shaft extending between the inlet and outlet. A flow metering unit divides the chamber into upper and lower sections and is operable for controlling the flow rate of material toward the discharge outlet. The rotor includes upper and lower sets of blades pivotally mounted on axes parallel and spaced radially outwardly of the central axis of the chamber.

Abstract: A mobile concreting apparatus and method which may be used, in particular, for on-site construction of swimming pools. It includes a vehicle supporting a plurality of containers, each adapted to contain one of the ingredients of concrete. Each container is provided with its own ingredient feeder which feeds the ingredients to a mixing device mounted on the vehicle to create a concrete slurry. The slurry is transferred from the mixing device to the surface to be coated by a structure including a slurry pump, a hose and a nozzle. Each ingredient feeder can be individually varied in the rate at which it feeds its ingredient so that the relative composition of the slurry, and the flow rate of the slurry, can be rapidly and selectively varied on the job site to meet the particular requirements for each job. In addition, feed rate settings which provide a desirable composition and overall feed rate can be noted and reproduced on subsequent occasions when the same composition and feed rate are desired.

Abstract: A substantially cylindrical canister is oriented in an upright position with its fill hole directed upwardly, and hydraulic cement is loaded into the top of this canister. The canister is then tipped on its side and connected via a swivel coupling to a suction line and to a line through which a radioactive-waste slurry may be fed. The interior of the canister is then evacuated and the canister is rotated about a horizontal axis passing through this swivel coupling. Radioactive waste is then sucked into the canister by the subatomospheric pressure therein and is intimately mixed with cement already inside the canister by inwardly projecting mixing vanes provided inside the canister.

Abstract: Apparatus of the invention includes a dispenser for mixing an discharging layers of the molding material onto the mold forming pattern, and means for producing selectively controlled relative movement between the dispenser and the pattern including a control system for varying the ratio of sand and binder in the mixture being dispensed in accordance with the relative position of the dispenser and the pattern. The apparatus may thus be controlled to provide for selectively variable ratios of sand and binder in accordance with the strength required of the mold at a particular position. The system also provides a selectively variable control of the thickness of each layer of molding material as the mixing head or pattern moves on a three axis coordinate system.

Abstract: A machinery skid unit comprising a machinery skid frame including a plurality of longitudinal frame members, cross-members mounted thereon and extending outwardly therefrom and a plurality of members secured to said longitudinal frame members in a horizontal plane below the cross-members. The machinery skid unit further comprises a plurality of engines, a plurality of positive displacement type pumps, a recirculating mixing system, a supply pump, and a recirculating pump.

Abstract: Apparatus is disclosed for continuous preparation of a blend of liquid sulfur in fluid asphalt in specified proportions to provide a dispersion of fine sulfur droplets in the asphalt, particularly suitable for coating onto aggregate to form "hot mix" for asphalt concrete of improved strength.

Abstract: An apparatus for manufacturing concrete panels with surface decoration patterns thereon said surface decoration patterns being formed by finishing material containing color cement or pigments or other coloring materials. The apparatus comprises a mortar hopper having a mortar outlet opening and a mortar shoot extending downward from beneath the outlet opening of the hopper. A molding surface is positioned below the mortar shoot and the mortar shoot extends to the molding surface. Color mortar containers are disposed above the mortar shoot to discharge color mortar materials contained therein. A mixing means incompletely mixes the mortar with the color mortar materials on the mortar shoot, a mixed mortar inverting descent guide plate is connected to the lower end of the mortar shoot and a vibrator is attached to the mortar shoot.