Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B28—WORKING CEMENT, CLAY, OR STONE
  • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
  • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
  • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
  • B28C5/10—Mixing in containers not actuated to effect the mixing
  • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
  • B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
  • B28C5/1269—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices for making cellular concrete
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
  • B01F33/80—Mixing plants; Combinations of mixers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B28—WORKING CEMENT, CLAY, OR STONE
  • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
  • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
  • B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
  • B28C5/381—Producing cellular concrete
  • B28C5/386—Plants; Systems; Methods

Definitions

• the invention relates to a method and a device for, in particular, the continuous production of foamed mixtures of binders or binders with additives and, if appropriate, the conveyance of such foamed mixtures to the place of use and a device for conveying the same.
• Mixtures made from binders and foam solutions are used, for example, as so-called foam concrete for various purposes. Due to the relatively safe handling of the building material foam concrete, it is used extensively and there are therefore already a number of mixing and pumping devices on the market with which such foamed mixtures can be produced and transported to the place of use.
• the same therefore primarily consists in creating a simple process for the production and, if appropriate, conveying of foamed mixtures of binders or binders with additives, which is easy to carry out, requires little mechanical effort and can therefore also be used on small construction sites to enable the use of foam concrete, which is generally recognized as advantageous, even for smaller construction objects.
• Another object of the invention is to provide a simple device for carrying out the method, which combines all of the units required for the method in a compact manner, is easy to transport and can therefore be installed on smaller construction sites in a very short time without great effort.
• the object of the invention is achieved with a method of the type defined at the outset, which is characterized in that a binder / additive suspension is continuously produced from the binder / additive and mixing liquid in a continuous mixer, into which a foam formed in a foam generator is added directly in the continuous mixer and is mixed in and the foam mixture formed is optionally conveyed to the place of consumption with a subsequent feed pump.
• the binder sludge was first produced in a mixer, which was then added to another mixer by means of a small pump in order to be mixed here with the foam produced in a foam generator and then to the place of use by means of a further pump
• the process according to the invention avoids such a time-consuming process step in that the foam formed is added directly to the continuous mixer and mixed in. It has proven to be particularly advantageous if the amount of foam formed in the foam generator can be controlled as a function of the amount of suspension formed in the continuous mixer.
• the device according to the invention for carrying out the method is known to consist of a metering and mixing device for binder / aggregate and mixing water, a foam generator, a mixing device for foam and binder suspension and, if appropriate, a conveying device for the mixture formed.
• This device is, however, characterized in that the metering and mixing device consists of a continuous mixer with mixer blades rotating in a housing, the foam generator opens directly into the housing and the foam formed is mixed into the suspension by the mixer blades before a subsequent conveying device The mixture is transported to the point of use or the mixture exits the continuous mixer in order to be transported to the point of use, for example by hand, by means of buckets and the like.
• the metering and mixing device consists of an essentially horizontally arranged continuous mixer.
• the existing mixing blades and / or the additional mixing blades can also be equipped with additional mixing bore openings for more thorough mixing of the binder suspension and foam.
• the continuous mixer for producing the binder suspension is of course provided with the usual metering devices with which the binder, which is usually supplied in the dry state, is mixed with the required amount of mixing water and then mixed with the added foam.
• the foam generator creates the foam from a foaming agent and water with the aid of compressed air.
• the foaming agent and water are expediently supplied from corresponding storage containers by means of two pumps, which are matched to the delivery rate, for foaming agents on the one hand and water on the other. It has proven to be expedient if the delivery rates for foaming agents, water and compressed air can each be read off using optical flow measuring knives and can be adjusted by means of a corresponding regulating valve.
• the foam generator which is expediently arranged in the vicinity of the mixer for the binder suspension, is arranged directly on the mixer for the binder suspension.
• the foam produced can be optimally introduced into the continuous mixer and mixed with the binder suspension.
• the amount of foam supplied can expediently be controlled via a corresponding valve without changing the proportions of foam agent, water and compressed air, the amount of foam supplied to the continuous mixer advantageously being controllable as a function of the amount of suspension and binder water formed.
• foams of constant quality in particular constant pore size
• foam materials of any desired quality are obtained.
• a feed pump which can expediently be a multi-stage eccentric screw pump, also conveys the foam material formed to the place of use over long distances.
• the individual units i.e. to arrange the continuous mixer for the binder, the foam generator and, if applicable, the conveying device, in combination on a common transport trailer.
• the arrangement of the individual units can be made so compact that there is still sufficient space for appropriate containers for foaming agents and water, so that in addition to the binder which is usually added in dry form, all the materials required for foam generation and also the necessary devices are arranged compactly together.
• Such a single-axle trailer can be transported quickly and can therefore be connected to any construction site in the shortest possible time and foam generation can be started.
• connecting pieces for supplying the continuous mixer with dry binder with which a silo container for the dry binder can be supplied directly or via appropriate conveyor systems can be connected.
• a special connecting piece is also provided for the mixing water, so that the mixing water for the preparation of the binder suspension and at the same time also the water for the production of the foam can be taken directly from the mains.
• the device according to the invention can thus be adapted in a simple manner and without difficulty to the required dimensions of the respective construction site.
• Fig. 1 shows a continuous mixer according to the invention for producing foam concrete.
• Fig. 2 shows an inventive device for producing and conveying foam concrete.
• the continuous mixer according to the invention shown in FIG. 1 for producing foam beds has a drive motor 1 which drives the drive shaft designed as a metering screw 3 via a corresponding gear 2.
• Dry binder 5 is introduced into the feed container 4 and a metering section 7 with the drive shaft designed as a metering screw 3 is provided in the preferably horizontally arranged mixing chamber 6 for volumetric allocation.
• the mixing chamber 6 is volumetrically allocated the liquid 9 required for the mixing process for the preparation of the binder slurry in such a way that a constant but controllable composition of the binder slurry is made possible.
• the mixing chamber 6 is expanded in the conveying direction of the mixing shaft 10 by a mixing chamber 11, via the access opening 12, foam 13 passes from the foam generator into the mixing chamber 11, where the foam is mixed directly with the binder mixture and emerges at the mixer end 14 as a homogeneous mixture.
• FIG. 2 shows the continuous mixer described in FIG. 1 in combination with a foam generator 15 known per se, the units required for foam production (air compressor 16, quantity control valve for the air 17, pump 18 for the foam solution provided in the barrel 20, congenital regulating valve 19 for the foam solution ).
• a pump 22 with an intermediate container 21 for the finished binder / foam mixture is also shown in FIG. A provided in the intermediate container 21 level control 23 acts on the drive motor 1 of the continuous mixer and on the
• the individual units shown more schematically in FIG. 2 can of course be arranged in their entirety on a chassis, for example a single-axle trailer, and thus represent an advantageous embodiment of the present invention.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Structural Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
• Accessories For Mixers (AREA)
• On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6122352

Family Applications (1)

Country Status (6)

Families Citing this family (27)

Family Cites Families (11)

• 1981
  • 1981-01-09 DE DE19813100443 patent/DE3100443A1/de not_active Withdrawn
• 1982
  • 1982-01-09 WO PCT/DE1982/000001 patent/WO1982002358A1/en unknown
  • 1982-01-09 EP EP82900343A patent/EP0069140A1/de not_active Withdrawn
  • 1982-01-09 JP JP57500425A patent/JPS57502254A/ja active Pending
  • 1982-01-09 CH CH5375/82A patent/CH657844A5/de not_active IP Right Cessation
  • 1982-09-02 SE SE8204993A patent/SE8204993D0/sv not_active Application Discontinuation

Non-Patent Citations (1)

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