6024results about "Cement mixing apparatus" patented technology

An apparatus configured for connection to a mixer for receiving a slurry and altering the flow characteristics of the slurry includes a conduit having a main inlet in slurry receiving communication with the mixer outlet and extending to a spout for discharging the slurry, at least one conduit restrictor associated with the conduit for creating back-pressure between the conduit restrictor and the mixer outlet for keeping the mixer full, and at least one pressure reducer associated with the discharge spout and configured for reducing the pressure of the slurry dispensed from the discharge spout. The apparatus is configured for maintaining a generally laminar flow from the mixer outlet to the discharge spout.

A concrete placement vehicle. The concrete placement vehicle includes a concrete mixing and placement system, at least one vehicle sensor configured to monitor a characteristic of the concrete placement vehicle and at least one concrete system sensor configured to monitor a characteristic of the system for mixing and placing concrete. The vehicle further includes a control system configured to control the operation of the concrete placement vehicle and the concrete mixing and placement system based on inputs received from the at least one vehicle sensor and the at least one concrete system sensor.

A method for mixing powder according to the present invention is a method for mixing powder by conducting mixing and transporting of at least one kind of powder, comprising: charging said at least one kind of powder into an agitation apparatus; and translating said at least one kind of powder while mixing the powder by rotating an agitation shaft of said agitation apparatus, said agitation apparatus comprising: a screw comprised of the agitation shaft and an agitating blade, said screw configured to rotate along with the said agitation shaft as the center; and, a casing surrounding said screw, wherein either the entire body of said agitating blade is formed of a high hardness member, or, a high hardness coat layer is formed onto at least a portion of said agitating blade.

A system for managing a concrete delivery vehicle having a mixing drum 14 and hydraulic drive 16 for rotating the mixing drum, including a rotational sensor 20 configured to sense a rotational speed of the mixing drum, a hydraulic sensor 22 coupled to the hydraulic drive and configured to sense a hydraulic pressure required to turn the mixing drum, a temperature sensor for sensing temperature of the drum, and a communications port 26 configured to communicate a slump calculation to a status system 28 commonly used in the concrete industry, wherein the sensing of the rotational speed of the mixing drum is used to qualify a calculation of current slump based on the hydraulic pressure required to turn the mixing drum. Temperature readings are further used to qualify or evaluate a load. Also, water purge connections facilitate cold weather operation.

A system for calculating and reporting slump in a delivery vehicle having a mixing drum (14) and hydraulic drive (16) for rotating the mixing drum, including a rotational sensor (20) configured to sense a rotational speed of the mixing drum, a hydraulic sensor (22) coupled to the hydraulic drive and configured to sense a hydraulic pressure required to turn the mixing drum, and a communications port (26) configured to communicate a slump calculation to a status system (28) commonly used in the concrete industry, wherein the sensing of the rotational speed of the mixing drum is used to qualify a calculation of current slump based on the hydraulic pressure required to turn the mixing drum.

The invention discloses a preformed material for post-tensioned prestressing pipeline vacuum grouting or mudjacking and a preparation method thereof. The preformed material includes the following components by weight percent: 65 to 95 percent of silicate cement, 0.01 to 3 percent of high-range water-reducing agent, 0 to 1 percent of stabilizing agent, 0.05 to 5 percent of retarding agent, 1 to 20 percent of expanding agent, 0.2 to 2 percent of corrosion inhibitor, 0.01 to 1 percent of air entraining agent and 0 to 30 percent of mineral materials, wherein by uniformly and proportionally mixing the silicate cement, the high-range water-reducing agent, the stabilizing agent, the retarding agent, the expanding agent, the corrosion inhibitor, the air entraining agent and the mineral materials, the post-tensioned prestressing pipeline vacuum grouting or mudjacking preformed material can be obtained. After being uniformly mixed and stirred with water with neutral pH value according to the water cement ratio ranging from 0.24 to 0.32, the preformed material can be used, the obtained grouting material has the advantages of low water cement ratio, favorable flowability, no water bleeding and delamination, and favorable pumpability; meanwhile, the preparation method of the preformed material is simple and the raw material sources of the preformed material are wide.

Methods and apparatus are provided for mixing fluids. In one embodiment of the invention, a fluid mixer is provided including one or more fluid inlet ports, a curved channel connected to the one or more fluid inlet ports including a first curved channel section and a second curved channel section disposed adjacent the first curved channel section, and an outlet port disposed adjacent the second curved channel section. In another embodiment of the invention, a method is provided for mixing fluids in a channel, including providing a channel having a first curved channel section, and a second curved channel section, providing the two or more parallel fluid streams into the second curved channel section of the channel, mixing the two or more parallel fluid streams in the first curved channel section of the channel, and mixing the two or more parallel fluid streams in the second curved channel section of the channel.

A vibrating flexible smoothing sheet or shroud disposed transversely of a direction of travel of a formed fiber panel including gypsum-cementitious slurry and embedded chopped fibers. The sheet is used to smooth the surface of the panel as it exits a fiber embedment station of a structural cementitious panel production line to remove grooves and other non-uniform surface imperfections to reduce the need for costly finishing after the panels are cured and cut to size. The flexible sheet is designed to float over the surface of the formed panel without tearing or otherwise damaging the surface of the heavily fiber reinforced surface layers of the panel. The vibrating sheet is pivotally mounted on the side dams of the web production line so it can float over the panel surface during use, but be raised off the line when not in use.

This invention provides wallboard with a gypsum core with improved antifungal properties based on the distribution of fungicide and starch. Preferably, the wallboard has a gypsum core having a first surface and a second surface; facing sheets adhered to the first and second surfaces; a fungicide and a starch in the gypsum core; wherein the concentration of fungicide and starch is greater in portions of the core adjacent to the facing sheets than in a center of the core. Also a method for manufacturing wallboard as described above.

The invention provides a bituminous composition, a process for preparing a bituminous paving composition and process for bituminous paving having lower mixing, paving, and compaction temperatures than for conventional hot-mix paving while retaining sufficient performance characteristics of conventional hot-mix paving. The inventive paving process comprises the steps of injecting a foamable solution comprising a lubricating substance into a heated, asphalt binder to provide a heated, foamed mixture; adding the heated, foamed mixture to a suitable, heated aggregate; further mixing the heated, foamed mixture and heated aggregate to coat the heated aggregate with the heated, foamed, asphalt binder to form a heated paving material; supplying the heated paving material to a paving machine; applying the heated paving material by the paving machine to a surface to be paved; and compacting the applied paving material to form a paved surface.

A process employing a wet mixer having a vertical mixing chamber for forming a wet slurry of a cementitious powder and liquid. The vertical mixing chamber is designed to provide the required amount of mixing to provide thoroughly mixed, uniformly thin slurry within a mixing residence time that allows for adequate supply of slurry to ensure continuous operation of an associated cement panel production line. Gravity feed means for supply of cementitious powder and water to the slurry mixing area of the chamber is also disclosed.

A wet mixer apparatus and method for its use, the mixer having a vertical mixing chamber for forming a wet slurry of a cementitious slurry and water. The vertical mixing chamber is designed to provide the required amount of mixing to provide thoroughly mixed, uniformly thin slurry within a mixing residence time that allows for adequate supply of slurry to ensure continuous operation of an associated cement panel production line. Gravity feeding for separate supply of cementitious powder and water to the slurry mixing area of the chamber without pre-mixing of the powder and water is also disclosed.

The invention belongs to the technical field of concrete reinforcement and relates to a method for reinforcing concrete with a fibrage net and a cement-based material. The method is to pour the fibrage net the total thickness of which is between 10 and 20 millimeters and fine concrete on the outer surface of a structure, and is characterized by comprising the following steps that: drilling holes on the surface of the structure in the process of construction; using the short end foot of a U-shaped shear resistant pin of which the two end feet have different lengths to hook the fibrage net, and inserting the long end foot thereof into the hole after a building structural adhesive is smeared on the long end foot; spraying the fine concrete after the adhesive is solidified; using the short end foot of a U-shaped hook of which the two end feet have different lengths to hook a second layer fibrage net, and inserting the long end foot thereof to the fine concrete; and spraying the fine concrete. The method can avoid the generation of interface micro cracks at high stress, effectively prevent interface peeling damages, reinforces building structures reliably, simply, efficiently and environmental protection, and is applicable to reinforcing and repairing various types of structures.

A high-efficiency mixing device for concrete, sand and gravel materials, comprising a bottom plate, on which a rotating shaft is rotatably installed, a mixing barrel is fixedly installed on the rotating shaft, and an annular rack is fixed and sleeved on the outer wall of the mixing barrel; a worm is fixedly installed on the drive shaft, and the top plate The lower side rotating type is equipped with incomplete gears and worm gears, the worm gears are connected with the worm, and the driving pulley is fixedly installed coaxially on the worm gear; the drive plate is fixedly installed on the lower side of the sliding shaft; the vertical rotating type on the bottom plate is equipped with a driven shaft , a cam is fixedly installed on the upper end of the driven shaft, and the cam is in contact with the transmission plate; the structure of the invention is ingenious, the stirring shaft can move up and down while driving the stirring blades to stir, so that the concrete gravel can be turned up and down, and the knocking block is on the sliding shaft The left and right reciprocating motion is driven by the driving force, and the wall of the mixing tank is continuously knocked, which improves the mixing effect and avoids the waste of concrete sand and gravel adhering to the inner wall of the mixing tank.

A volumetric concrete mixer includes a monitoring and control system that assures a uniform amount of cement per unit of aggregate. A processor is in communication to receive an input of a weight of a cement bin from a cement bin load cell and in communication to receive an input of a number of rotations of a conveyor from an aggregate sensor. The processor is adapted to determine a rate of change of weight of the cement bin over a set number of rotations of the conveyor, and to instruct the cement dispenser to adjust the cement dispenser speed to maintain a constant rate of cement being dispensed from the dispenser bin to the mixing area per the set number of rotations of the conveyor.

The invention discloses foam concrete and a preparation method thereof. The foam concrete comprises a gelling material, light aggregate, water, admixture and foaming agent. The preparation method comprises the following steps: (1) pre-treating raw materials to prevent hard lumps and hard grains in the raw materials from depositing in foam slurry; (2) weighing each component according to a proportion; (3) preparing and adding foaming solution; (4) loading and stirring, namely, adding water into a stirrer, starting the stirrer, and adding cement, coal ash, perlite, waterproof agent, anti-freezing agent, water reducing agent and fiber into the stirrer in turn; (5) foaming, namely, foaming at the same time of stirring the slurry, sealing a valve firstly and then pressurizing the valve by an air compressor; (6) adding foam, namely, after the gelling slurry is well prepared, adding the foam into the gelling slurry under the state of stirring without stopping the stirrer; and (7) casting and molding, namely, when the slurry surface has no floating foam, finishing the preparation of the foam slurry. The foam concrete has the functions of light weight, water proofing, fire resistance, heat insulation, freezing resistance, cracking resistance, shock resistance and the like, and is particularly suitable for engineering insulating layers in cold areas and water-blocking and shock-resistant layers of underground engineering.

The invention provides a method for producing baking-free bricks by using phosphorous gypsum based cementitious material to solidify yellow phosphorous slags. 1) The raw materials and formula of the invention are as follows: (1) the phosphorous gypsum cementitious material: 40-60 parts of phosphorous gypsum, 0-30 parts of yellow phosphorous slags, 0-30 parts of pulverized fuel ash, 0-5 parts of blast furnace slag, 10-15 parts of calcined lime, and 0-10 parts of carbide slag; (2) the mateirals of the baking-free brick green bodies: 100 parts of phosphorous gypsum cementitious material, 150-300parts of yellow phosphorous slags raw materials, 2-4 parts of activator, 0.2-1 part of auxiliary agent, and 10-40 parts of water. 2) The preparation method: the baking-free bricks are produced throughthe steps of treating raw materials, mixing the solution with additive, preparing brick blanks and moulding and conserving. In the production process of the invention, no organic matter is added, thus completely avoiding the pollution problems of toxic substance caused by degradation of organic materials, and the release of additive and volatilization of residues, and having the advantages of lowcost, good physical property, high production efficiency, saving of energy consumption and non environmental pollution.

An embedment device includes a first integrally formed elongate shaft rotatably secured to the support frame and having a first plurality of axially spaced disks axially fixed to the first shaft, a second integrally formed elongate shaft rotatably secured to the support frame and having a second plurality of axially spaced disks axially fixed to the second shaft, the first shaft being disposed relative to the second shaft to be horizontally aligned and so that the disks intermesh with each other, and wherein, when viewed from the side, peripheries of the first and second pluralities of disks overlap each other.

Apparatus for removing concrete from the interior surfaces of a concrete mixing drum, the drum including an open end and at least one interior surface facing away from or opposite the open end, the apparatus including an elongate probe having a longitudinal axis and an axially extending forward end adapted for insertion into the drum through the open end thereof; a vertically adjustable support structure supporting a guideway support, the guideway support including at least one bearing adapted for supporting the probe for movement of the forward end thereof into and out of the drum through the open end thereof; and at least one fluid nozzle mounted to the probe in position for discharging a stream of fluid against the at least one interior surface facing opposite the open end under sufficient pressure to dislodge accumulated concrete therefrom as the probe is moved in the drum.

The invention relates to a collaborative operation system and method, a concrete pumping apparatus and an agitating truck. A detection device in the collaborative operation system detects concrete level information and/or concrete remain information in a hopper; and a control device receives a detection signal and controls the discharge speed of the agitating truck according to a prestored control strategy, so that the concrete in the hopper can not overflow or be pumped emptily, or the level of the concrete in the hopper is maintained to a certain level, thereby implementing collaborative operation between the pumping truck and the agitating truck. By using the invention, the pumping truck and the agitating truck can implement collaborative operation at the concrete construction site, and one operator can be saved. The invention also provides a pumping apparatus provided with the detection device and an agitating truck provided with the control device, so that the pumping apparatus and the agitating truck have the conditions for collaborative operation. Besides, the invention also provides a collaborative operation method, according to which the collaborative operation between the agitating truck and the pumping equipment apparatus can be controlled.

The invention discloses a thermal insulation building mortar. The thermal insulation building mortar is prepared by the mixing portland cement, pulverized fuel ash, calcium bentonite, re-scattering glue powder, hypromellose, polyacrylamide powder, polypropylene fibre, wood fiber, permeating crystal waterproof agent, air entraining agent, vitrified micro-bead, sizing phase-change material and hollow glass bead. A preparation process thereof comprises the steps of: a) preparing the sizing phase-change material, b) preparing the permeating crystal waterproof agent and c) preparing the thermal insulation building mortar. The mortar of the invention is characterized by the functions of thermal insulation, phase-change energy storage, temperature control, water resistance and energy saving, the wide application scope and low cost. The mortar is widely applied in thermal insulation work inside or outside the buildings and has a broad prospect.

A low profile particulate mixing plant is described. The plant is suitable for discharging the components of a particulate mixture. The plant includes a pair of storage receptacles located side-by-side. Each of the receptacles has a discharge adjacent an underside thereof to transfer a component of the particulate material mix within each receptacle to a respective conveyor at a height adjacent to ground level. The conveyor elevates the components from the discharges to a mixing station spaced from the receptacles. The plant is suitable for use as a concrete mixing plant.

Disclosed are method and system for treating concrete in mixing drums of delivery vehicles having automated rheology (e.g., slump) monitoring systems programmed to dose fluids into concrete based on the monitored rheology. The present invention takes into account a Revolution-To-Discharge value (“RTD”) which reflects drum rotations needed to move concrete towards and through the mixing drum opening from which concrete is discharged, and also takes into consideration a Volume-Per-Revolution-Upon-Discharge (“VPRUD”) value which reflects the relation between the rate of discharge and rheology (e.g., slump) of concrete upon discharge. The invention is especially useful for reclaiming concrete in the drum after delivery and can confirm rheology based upon peak (maximum) discharge pressure. The present inventors found surprisingly that discharge pressure readings are useful for recalibrating automated rheology monitoring systems as well as for reporting and/or treating the remainder concrete.

To provide a liquid crystal display device of high image quality, and a manufacturing method therefor. A polymerizable compound in a liquid crystal composition is polymerized in a state that liquid crystal molecules present in a gap between a pixel electrode and at least either one of signal electrodes and scanning electrodes are tilted in a direction from the at least either one of the signal electrodes and the scanning electrodes toward the pixel electrode. Preferably, the amount of the polymerizable compound remaining in the liquid crystal phase after the polymerization is not more than 0.05 parts by weight per 100 parts by weight of the liquid crystal. In a seal section surrounding the liquid crystal layer, a second seal wall is preferably provided at a position opposite to the liquid crystal injection inlet in the non-display section.

The invention discloses an efficient concrete stirring device for civil engineering construction. The efficient concrete stirring device for civil engineering construction comprises a bottom plate, wherein a left vertical column and a right vertical column are vertically and fixedly installed on the bottom plate, a top plate is horizontally and fixedly installed at the upper ends of the left vertical column and the right vertical column, a slide plate is horizontally and slidably arranged on a limit hanging frame, a second rack is arranged on the front surface of the slide plate, a horizontalextension plate is horizontally and fixedly installed on the right sidewall of the left vertical column, and a second bevel gear in engagement connection with a first bevel gear and a third bevel gearis rotationally arranged on a support; and a limit sleeve is arranged on the outer sidewall of a gantry stirring frame, and a slide rod is horizontally and slidably arranged on the limit sleeve. Theefficient concrete stirring device for civil engineering construction is ingenious in structure and reasonable in design; the gantry stirring frame drives stirring blades on the inner sidewall of thegantry stirring frame to stir concrete while a stirring shaft drives the stirring blades to carry out rotary stirring on the concrete in a stirring bucket; and moreover, the rotation directions of thegantry stirring frame and the stirring shaft are opposite, so that the stirring efficiency for the concrete is greatly increased, and the mixing effect for the concrete is promoted due to the rotation of the stirring bucket.

Thermal processing of recycled asphalt pavement (RAP), having up to approximately 8% or more moisture content, dries and preheats the material to enhance efficient recycling in a hot mix asphalt plant. A combustor and heat exchanger reheat circulating hot oil, which with hot gas, moves through a hollow auger and around the RAP counter to the flow of RAP. Moisture is forced outward from within the particles and is flashed away by the hot exhaust gas. A similar secondary heater heats the RAP to just below asphalt coking temperature before the hot dry RAP is added as an aggregate to the hot mix asphalt plant.

A method, for obtaining a mix of a plurality of matters in a fluid state comprises providing for a first matter of the plurality of matters a first flow of matter. For each matter of the plurality of matters distinct from the first matter, a flow of matter is provided at a determined flow rate. The method further comprises gathering each flow of matter at an inlet of a mixer, the mixer continuously producing at an outlet a substantially homogeneous flow of matter corresponding to the mix.

A pre-mixer agglomerator and method of pre-mixing batching ingredients used to produce concrete mixes is disclosed. Specifically, this invention involves a pre-mix system which blends the wetting agents and the cementitious ingredients in relation to each other at any selected ratio in an adjustable and repeatable manner. The pre-mixer is a twin screw, preferably counter-rotating, pre-mixer agglomerator unit for pre-mixing these materials prior to combining them with aggregates in a drum of a transit mixer truck or other final mixing vessel.

A concrete transit mixer truck includes a control system that automatically controls rotation of the mixer drum at a constant drum speed when the mixer truck is traveling. When sensed speed of the truck exceeds a threshold, the control system automatically causes a hydraulic system to rotate the drum at a constant speed, regardless of the truck engine speed.

The present disclosure involves systems and methods for applying CO2 to concrete, which may be performed in-situ or through a separate, stand-alone process. According to another embodiment disclosed herein, a system and method for applying CO2 to one or more materials used in the production of concrete is also provided.