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8157431 |
Low emission energy efficient 100 percent RAP capable asphalt plant
An HMA plant which uses combination direct exhaust heated and indirectly steam heated pre-heating drum in combination with a sealed indirect hot oil heated rotary shaft mixer, where the steam given...
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8099218 |
Paving system and method
A method of operating a paving system includes establishing a plan for paving a work area which is based on a positional temperature model. The method further includes receiving temperature data...
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8066422 |
Material moisture content adjustment method
When making moisture content adjustment by adding liquid such as water to a raw material such as pulverulent material including bentonite, uniform mixing of the liquid such as water with the raw...
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8066421 |
Method of adding STMP to a gypsum slurry
The disclosure relates to a method for effectively and efficiently adding sodium trimetaphosphate to a gypsum slurry. In one exemplary embodiment, the sodium trimetaphosphate is added at the same...
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7950841 |
Concrete cooling injection unit and method of injecting a coolant into a concrete mixture
A method and apparatus for cooling a mixture with an injection system. The injection system is adjustable to accommodate the relative position and particular specifications of a given container...
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7114843 |
Method of manufacturing a bituminous coated aggregate mix
A method of manufacturing a bituminous coated aggregate mix, said method comprising at least the following steps: (a) course aggregate are dried by heating;(b) an intermediate mix is formed by...
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6928891 |
Material sample preparation apparatus and method
An automated apparatus for preparing material samples includes a rotatable drum support assembly, a drum rotatably contacting the drum support assembly, a fan, and a powered drive mechanism. The...
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6832850 |
Hot-mix asphalt manufacturing system and method
A hot-mix asphalt manufacturing system includes a counter-flow rotary dryer having a combustion chamber, an inlet for dry ingredients, an outlet for hot-mix asphalt, and a pollution control device....
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6780356 |
Method for producing an inorganic foam structure for use as a durable acoustical panel
A process and apparatus for creating an acoustically absorbent porous panel comprises the steps of dispensing cement and fibers with a dry mixer to create a dry mix and aqueous mixing water,...
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6733168 |
Separating and sorting apparatus for asphalt
An apparatus and method for testing asphalt in the field is described. The apparatus includes a motor for rotatively driving a chamber containing the asphalt to be tested. The chamber is rotated...
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6676862 |
Method for forming lightweight concrete block
A method and apparatus for efficiently forming individual building units is provided, generally includes providing a plurality of molds, each capable of simultaneously forming a plurality of...
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6533970 |
Method for making aerated concrete blocks having at least one passageway drilled therein
A method for making aerated concrete blocks includes dispensing materials for making aerated concrete into a mold and allowing the materials to rise and stiffen into a body. The body may be divided...
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6425685 |
Process for reclaiming salvaged asphalt
A process for reclaiming salvaged asphalt includes feeding salvaged asphalt mixed with new sands, stones and tar in a designed proportion into a double-layer drying machine including inner and...
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6267847 |
Pulper for a stock preparation system
A pulper in a stock preparation system includes a housing with a fiber inlet, at least one water inlet, at least one outlet and an inner chamber. A plurality of stationary pulping foils are...
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6030111 |
Method of and system for recycling molding sand
Molding sand of a used greensand mold is recycled by adding water and binder to sand particles fatigued by heating applied by a molten metal during molding and segregated from vigorous molding sand...
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5664881 |
Counter-flow asphalt plant with multi-stage combustion zone overlapping the mixing zone
A drum mixer is provided with a rotatable cylinder in which aggregates, reclaimed asphalt pavement and liquid asphalt are mixed to produce an asphaltic composition. The drum cylinder includes a...
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5277490 |
Method and apparatus for producing bituminous mixtures
Method and apparatus for producing mixtures containing bitumen, in which the material to be treated is conveyed by the force of gravity through a slit-type space between two vertically arranged...
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5201839 |
Countercurrent drum mixer with second heat source
An asphalt production system utilizing a pair of rotatable drums for producing an asphaltic composition is provided. The asphaltic composition is produced by separately heating a volume of virgin...
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5100239 |
Method of manufacturing concrete
Method for manufacturing concrete by mixing concrete materials including a cement, aggregate, admixture and at least one of water and ice. The aggregate is moved prior the mixing and a...
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4989986 |
Double counter flow drum mixer
A drum mixer is provided for producing an asphaltic composition. The drum mixer utilizes a first heat source located at an intermediate position within the drum mixer for producing a first current...
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4957434 |
Method and apparatus for treating asphaltic concrete paving materials
A method of heating reclaimed asphalt paving is shown and described. An air sorter removes fine materials from the reclaimed asphalt paving, and an air circulating dryer which utilizes high...
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4940334 |
Reverse flow mixing method for direct-fired asphaltic concrete drum mixers
A reverse flow post-mixer attachment for direct-fixed asphaltic concrete mixers includes a modified discharge box for the downstream end of the drum and an enclosure for the downstream portion of...
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4919538 |
Drum mixer having a combined mixing and heating zone
A combustion housing for surrounding a burner flame is provided at an intermediate location within a drum mixer. An annulus is formed by the combustion housing and the interior of the drum adjacent...
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4913552 |
Countercurrent drum mixer
A drum mixer having an countercurrent flow drying zone and a parallel flow mixing zone is provided for producing an asphaltic composition. The drum mixer utilizes a heat source located at an...
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4887908 |
Mobile asphalt crack sealant apparatus
Disclosed is a mobile sealant material apparatus comprising a frame adapted for vehicular movement and bearing a scraped-surface, indirectly-heated jacketed vessel for housing heated, fluid sealant...
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4738539 |
Process and device for fabricating bituminous coated products from aggregates enclosing a large quantity of fines
Process and device for fabricating bituminous coated products from aggregates enclosing a large quantity of fines, using a drying-mixing drum having a case (1) provided internally with fins of...
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4522498 |
Asphaltic concrete recycle apparatus and method
An apparatus for recycling asphaltic concrete comprises an elongated rotatable drum in which composition is introduced at a first end and recovered at the opposite second end, and having a burner...
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4519711 |
Drum mixer and method
The productive capacity of a drum heater and mixer for asphalt paving composition intended for processing recycled materials can be increased substantially by spraying a curtain of water vertically...
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4504149 |
Closed end drum asphaltic concrete recycle apparatus and method
Apparatus for recycling asphaltic concrete comprises an elongated drum having a first, open end, through which hot gases of combustion are directed and product is concurrently recovered, and a...
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4481039 |
Method for recycling asphaltic concrete
An improved process for recycling asphaltic concrete comprises introducing asphaltic concrete particles at one end of an elongated rotating drum while supplying flame and hot gases of combustion to...
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4411530 |
System and method for rapid beneficiation of Bentonite clay
A system and method for rapid beneficiation of bentonite clay is disclosed. Beneficiation of the bentonite clay occurs through oxidation of structural ferrous iron. For rapid beneficiation,...
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4408985 |
Method of fixing hazardous substances in waste foundry sand
A method is disclosed for fixing certain dangerous substances into recyclable waste foundry sand so that they are less likely to leach out into the environment. The method uses a roasting process...
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4387996 |
Batch method of recycling asphaltic concrete
A batch method of producing asphalt-aggregate composition having a temperature of at least about 200° F. and at least about 20% used asphaltic concrete comprises heating solid particles of the ...
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4332478 |
Method and apparatus for reducing smoke emissions in an asphalt drum mixer
A method and apparatus are disclosed which reduce smoke emissions in an asphalt drum mixer. A drum mixer heats virgin aggregate to a relatively high temperature in a first drying zone. Virgin...
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4326809 |
Recycling apparatus for asphaltic concrete
An improved apparatus for recycling asphaltic concrete comprises a rotatable drum having a first port at one end open to atmosphere, a burner adjacent the first end, a second port at a second end...
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4318619 |
Method of and apparatus for asphaltic concrete hot mix recycling
A method of hot mix recycling of old asphaltic concrete paving heats the old pavement, after it has been removed and sized, to a temperature below its firing point and heats fresh aggregate to a...
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4309113 |
Asphaltic concrete recycle exhaust gas treatment apparatus and method
An improved process for cleaning asphaltic concrete recycle gases comprises introducing a flame into the exhaust gas stream at the opposite drum end that heating gases are introduced.
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4298287 |
Center draft asphaltic concrete drum mixer
In a continuous drum mix asphalt plant, dust is exhausted from an intermediate zone of the drum mixer between its drying and mixing zones. The dust is exhausted radially through openings into a...
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4240754 |
Asphaltic concrete patch mixing and heating apparatus and method
An apparatus for heating and mixing an asphalt-aggregate composition comprises a drum rotatable about an axis, having a mixing and heating chamber with a restricted port at one end into which a...
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4130364 |
Method and portable apparatus for treating asphalt paving material
A method and apparatus for treating paving material wherein the asphalt material is tumbled within an inclined drum so that it initially passes through the center portion of a stream of hot gases...
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4106112 |
Handling and cooling foundry sand
A process and an apparatus for cooling and handling sand in which hot used sand is delivered to a mixer and mixed with cooler sand. The mixed sand is discharged from the mixer for circulation on...
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3999743 |
Asphalt-aggregate recycle process and apparatus
In a process for recycling used asphalt-aggregate compositions in a conventional type dryer-mixer drum in which the composition is exposed directly to flame and hot gases of combustion while it...
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3773303 |
METHOD AND MEANS TO OPERATE PUMPING SYSTEM
Hot and cold liquid molten congealable hydrocarbons are mixed and otherwise prepared for pumping by a conduit and pump system for pumping such liquids (e.g., hot asphalt). The system is cleaned by...
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3622130 |
APPARATUS FOR HANDLING AND SPRAYING COATING MATERIAL
A method and apparatus for mixing, transferring and spraying a cementitious coating material. The apparatus includes a main power source for driving a hydraulic pump, which drives hydraulically a...
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3614071 |
ASPHALT PLANT DRYER-MIXER
An asphalt plant dryer-mixer is disclosed wherein the aggregate of the mix is delivered to the upper end of an inclined rotatable cylinder, a fan induces a flow of air through the cylinder from its...
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3583172 |
CRYOGENIC COOLING OF CONCRETE
A concrete mixture may be cooled to any desired temperature range specification prior to pouring, by spraying or injecting a cryogenic liquid, such as liquid nitrogen, directly onto or into the...
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3480260 |
METHOD AND MEANS FOR MIXING A MASS OF CONCRETE OR OTHER MATERIAL
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3400916 |
Method and apparatus for conditioning particulate materials
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3317192 |
Method and apparatus for preparing a bituminous concrete mix
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3134579 |
Method of treating flue dust
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