US3871628A - Conveying and mixing arrangement, particularly for powdered and/or particulate masses - Google Patents
Conveying and mixing arrangement, particularly for powdered and/or particulate masses Download PDFInfo
- Publication number
- US3871628A US3871628A US312385A US31238572A US3871628A US 3871628 A US3871628 A US 3871628A US 312385 A US312385 A US 312385A US 31238572 A US31238572 A US 31238572A US 3871628 A US3871628 A US 3871628A
- Authority
- US
- United States
- Prior art keywords
- mixing screw
- mixing
- components
- screw
- conveyor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C9/00—General arrangement or layout of plant
- B28C9/04—General arrangement or layout of plant the plant being mobile, e.g. mounted on a carriage or a set of carriages
- B28C9/0454—Self-contained units, i.e. mobile plants having storage containers for the ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
- B28C7/10—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of rotary members, e.g. inclinable screws
Definitions
- the present invention relates to a mobile conveying and mixing arrangement, particularly for powdered and/or particulate masses, which comprises two conveyors which are driven by a pow-er source and convey components to be blended together into a mix from respective component containers.
- the arrangement is basically characterized in that the components are brought together in the lower portion of a mixing screw whose longitudinal axle is inclined relative to the horizontal plane and which is substantially enclosed by a casing. The diameter, pitch, rpm.
- the components are imparted a rolling, tumbling movement on their way through the mixing screw towards an outlet in order to produce an effective blending of the components.
- the present invention relates to a conveying and mixing arrangement, particularly for powdered and/or particulate masses, which arrangement includes conveyors driven by a power source, the components to be intermixed being conveyed, and combined, from individual containers.
- the composition and water content of the concrete mix For certain uses, particularly the spraying of concrete, it is desirable for numerous reasons to vary the composition and water content of the concrete mix according to the degree of moisture of the foundation or bed on which the concrete mix is to be sprayed.
- the wrong amount of water will cause, inter alia, the worsening of the adhesion on the foundation with increased spillage and uneven strength of the finished concrete resulting.
- a varying degree of moisture in the ballast used will also mean that the addition of the same amount of water at different times will result in mixtures having different properties depending on the raw material used. It is desirable that the mix used has an optimum composition for a particular job.
- an accelerator for increasing the rate of setting be mixed into the concrete mix.
- the present state of the art requires the accelerator to be admixed at an early stage, thus further complicating the time factor problem with the use of the concrete mix.
- the accelerator often has to be added in larger quantities than is required so that an unnecessarily large amount of accelerator is used up.
- the invention aims at producing a conveying and mixing arrangement which makes possible the mixing of the solid components in the concrete mix right at the job site at the rate corresponding to the rate at which they 'are used up. Another goal is to make possible the mixing of the solid components in accurately balanced proportions which can be mutually varied in a simple manner.
- the invention also intends to produce a robust, simple and mobile conveying and mixing arrangement.
- FIG. 1 is a schematic view of a concrete spraying unit.
- FIG. 2 is a vertical projection of the conveying and mixing arrangement shown in FIG. 1 and mounted on a vehicle.
- FIG. 3 is a side view of a primary conveyor and mixing screw with accompanying details.
- FIG. 4 is a top view of what is shown in FIG. 3.
- FIG. 5 shows a section along the line VV in FIG. 3.
- FIG. 6 shows a section along the line VI-VI in FIG. 3.
- FIG. 7 is a side view of a secondary conveyor with accompanying details.
- FIG. 8 is a top view of what is shown in FIG. 7.
- FIG. 9 shows a section along the line IXIX in FIG. 7.
- FIG. 10 shows a section along the line XX in FIG. 7 and FIG. III shows a portion of a longitudinal section through the primary conveyor and mixing screw.
- FIG. 1 schematically shows the essential parts of a unit for spraying concrete.
- a conveying and mixing arrangement 2 is mounted on a vehicle 1.
- a conventional concrete sprayer 4 is fed from the outlet 3 of the conveying and mixing arrangement.
- the powdered and/or particulate masses which were blended together in the conveying and mixing arrangement 2 are conveyed in fluidized state from the concrete sprayer 4 by means of compressed air to a spray nozzle 5 where water under pressure is supplied.
- a ready-mix concrete is sprayed out of the spray nozzle 5 and its water content is controlled by the person handling the spray nozzle.
- the advantage is gained of being able to easily alter the amount of water in the concrete mix to conform with the actual needs.
- the conveying and mixing arrangement 2 includes pockets for the solid components in the concrete mix.
- the pockets are placed side by side.
- Both pockets open at the bottom at their respective screw conveyors, a primary conveyor 8 and a secondary conveyor 9, respectively.
- the primary conveyor 8 in communication with the ballast-containing pocket 6 turns into a mixing screw 10 at its upper end, the feed-out end, which screw extends to the outlet 3.
- the primary conveyor 8 and the mixing screw 10 share a common shaft 11 which forms a defined angle with the horizontal plane.
- the outlet 3 is higher than the primary conveyor 8.
- the secondary conveyor 9 in communication with the binder-containing pocket 7 opens with its feed-out end 12 closely above the bottom portion of the mixing screw 10.
- the primary conveyor 8 and the mixing screw 10 are enclosed in a common casing 13 whereas the secondary conveyor 9 is placed in a separate casing 14.
- the upper part of the casing 13 is fixed at the pocket 6 by means of bars 15.
- the shaft 11 i.e., the primary conveyor 8 and the mixing screw 10 is driven by a separate power source 16 (see FIG. 3).
- the conveying capacity of the mixing screw 10 is preferably equal to the capacity of the concrete sprayer 4.
- the secondary conveyor has, as is shown in FIG. 7, its own power source 17 whose rpm. is made variable by a variator 18. It is hereby possible to vary the capacity of the secondary conveyor 9 thus also making possible a change, in a desired manner, of the proportions between the ballast and the binder.
- the shaft 11 and the secondary conveyor 9 can be interconnected via a gear with a fixed or variable ratio and, by varying the speed, within certain limits, of a common power source, it will be possible to change both the mixing proportions and the amount of the mix.
- the casings 13 and 14 are U-shaped and open at the top, as is revealed in FIGS. and 6, 9 and respectively. Both casings substantially enclose the screw means placed inside them and the edges of the casings essentially reach up to a level even with the upper limits of the screw means.
- the end of each casing where the material is fed into respective conveyors is provided with a door 19 and 20 respectively which is openable for emptying and cleaning purposes.
- the part of the casing 13 which encloses the mixing screw 10 is internally lined with a replaceable lining 21 of rubber or similar material, as shown in FIG. 6.
- the diameter of the primary conveyor 8 is considerably smaller than the diameter of the casing 13 and the diameter of the mixing screw 10. Furthermore, the pitch of the primary conveyor is less than the pitch of the mixing screw 10 so that the capacity of the primary conveyor is less than that of the mixing screw.
- the dimensions and r.p.m. of the secondary conveyor are so adapted that the desired amount of binder is fed to the mixing screw 10.
- the arrangement works as follows:
- the primary conveyor 8 is kept constantly filled with material from the ballast-containing pocket 6 and, because of the difference in dimensions between said conveyor and the casing 13, a stationary ballast layer is formed around the primary conveyor 8 while the ballast material in the primary conveyor is fed towards the mixing screw.
- the stationary ballast layer has a friction-reducing effect whereby larger particles at the outer diameter of the conveyor can be embedded in this layer instead of, as is usually the case, being squeezed against an adjacent wall.
- the ballast from the primary conveyor 8 and the binder from the secondary conveyor 9 are brought together in the mouth of the mixing screw i.e., close to the connection to the primary conveyor.
- the amount of the ballast and the binder together is not enough to fill the mixing screw which is so dimensioned that the combined components, when conveyed through it, are made to roll or tumble in order to produce an effective blend of the components.
- the intermixed components are them emptied in an in an even flow into a concrete sprayer 4.
- the components combined in the mixing screw have just the right amount of space available in the mixing screw. This is achieved, as mentioned above, by having both the pitch and the diameter in the mixing screw greater than in the primary conveyor.
- the ratio between the diameter D of the mixing screw and the diameter D, of the primary conveyor ought to be greater than l.20:l and less than 1.50:1, preferably about 1.35:1; the ratio between the pitch S of the mixing screw and the pitch S, of the primary conveyor ought to be greater than 1.511 and less than 2.511, preferably 2:] (see FIG. 11).
- the angle of inclination a of the shaft 11 towards the horizontal plane 22 see FIG.
- the mixing screw 10 may be varied between a negative value, where the mixing screw 10 is placed lower than the primary conveyor 8, and a positive value where the mixing screw 10 is positioned higher than the primary conveyor 8.
- the greatest negative value for a is about -l0 and the greatest positive value is about +30".
- a positive value for a is chosen, preferably in the 18 22 interval to obtain the best mixing results.
- the mixing screw 10 ought to have a longitudinal extension corresponding to at least six times the pitch.
- the r.p.m. of the shaft is adapted to given data for the mixing screw so that the desired rolling, tumbling movement is obtained.
- the spiral on commonly designed screws of the type used in conveyors forms a right angle with the screw shaft.
- the spiral on both the primary conveyor and the mixing screw has an angle of inclination [3 relative to a line perpendicular to the axis so that the periphery of the spiral lies closer to the outlet than the spirals connection with the shaft does (FIG. 11).
- Angle B which on conventional screws is 0, may be as great as about 3 but ought to be about 1.5". It has been shown to be preferable to have a plane surface rather than a curved surface on the spiral.
- the pitch may not at any place decrease towards the outlet 3; otherwise the risk of clogging arises.
- the capacity of the primary and secondary conveyors ought to be variable so that it is possible to obtain a mixing ratio between 113.5 and 1:5.5 between thebinder and the ballast. Since the periphery on the primary conveyor is subjected to greater wear than the corresponding portion on the secondary conveyor, a pre-set mixing ration will gradually be altered. This is counteracted to a certain degree in that the walls of the spiral and the shaft also wear; however, it is still advantageous to regularly check for wearing and, by corresponding adjustment of the mutual conveying capacity of the primary and secondary conveyors, restore the desired value of the mixing ratio.
- the screw e.g. may be provided with a facing which again increases the screw diameter and thereby prolongs the life of said screw.
- Operational reliability is further improved if the pockets are provided with means to prevent the components stored in the pockets to stick to said pockets. Therefore, these pockets can suitably e.g. be coated internally with plastics and optionally be equipped with mechanical or pneumatic vibrators which e.g. can be operated for a short period each time conveying is begun and ceased. This diminishes the risk for bridge building and the like.
- an accelerator into the concrete mix.
- the arrangement shown here provides different possibilities for mixing a powdered accelerator with the ballast and the binder. The best effect is achieved by first blending the accelerator in with the binder so that the particles which will affect each other come into as close contact as possible. This can be done e.g. by shaping a portion of the secondary conveyor 9 as a mixing screw and supplying accelerator to said portion in the desired amount, e.g. via an extra screw conveyor. Another, but less preferable possibility is to.instead add the accelerator in the mixing screw 10 in the same way as the binder.
- the supply of accelerator can be varied according to its need via suitable arrangements.
- the lining 21 in the casing 13 serves as a wearing surface and impedes adhesion on the walls of the casing. It even has a certain noisemuffling effect. Because the casings 13 and 14 are open at the top, it is easy for the person handling the arrangement to control the mixing procedure. Moreover, cleaning is facilitated since easy access is provided.
- the conveying and mixing arrangement 4 can be made mobile in numerous ways. This is advantageous for the effectiveness of the arrangement since a mobile unit can be moved into from one job site while the concrete is setting to another site where its use is required. If the different job sites are close to one another, it is also possible to leave the arrangement in one place and to transport only the raw materials essential for making the concrete. Normally, only one man is required to look after the conveying and mixing arrangement, and one man handles the spray nozzle. Thus, significant working capacity is achieved with a minimum of personnel. The opportunity of being able to produce an optimum concrete mix at all times results in a decrease of spillage and an improvement in the quality of the finished concrete as compared with what it is possible to produce with previously known arrangements.
- An arrangement for conveying and mixing at least two different dry particulate components including for each such component a container and a conveyor driven by a power source, said conveyors being arranged to bring together from their respective containers such components into a driven mixing screw having a feed-in end and a feed-out end;
- a first conveyor for a first component being a screw conveyor joined with and changing into the feed-in end of said mixing screw, said first conveyor having a smaller pitch and smaller diameter than said mixing screw;
- said first conveyor and said mixing screw being substantially enclosed by a common casing having a substantially constant inner width
- said first conveyor and mixing screw having a common shaft of constant diameter
- a second conveyor for a second component being arranged to discharge and to feed the mixing screw above the feed-in end of the mixing screw
- the ,screw surface of the mixing screw being continuous and imperforate between the shaft and a pcripheral outer edge at a constant radial distance from the shaft,
- a radius to said screw surface having an angle ofinclination relative to a plane perpendicular to the lengthwise direction of said shaft and inclining away from said plane in a direction towards the feed-out end of the mixing screw
- the mixing screw having its diameter, pitch, r.p.m. and angle of inclination relative to a horizontal plane so mutually adapted to the volume of the components brought together that said components only partly fill said mixing screw and are imparted a rolling, tumbling movement on their way towards the feed-out end of the mixing screw, thus causing an effective dry mixing of the components.
- said angle of inclination of the mixing screw axle relative to the horizontal plane is a value between -l0 and +30", the negative value implying that the mixing screws feed-out end lies lower than its feed-in end and the positive value implying that the mixing screws feed-out end lies higher than its feed-in end, said angle of inclination being preferably positive and lying within the +l8 and +20 interval.
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Developing Agents For Electrophotography (AREA)
- Coating Apparatus (AREA)
- Screw Conveyors (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE15876/71A SE358583B (it) | 1971-12-10 | 1971-12-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3871628A true US3871628A (en) | 1975-03-18 |
Family
ID=20301365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US312385A Expired - Lifetime US3871628A (en) | 1971-12-10 | 1972-12-05 | Conveying and mixing arrangement, particularly for powdered and/or particulate masses |
Country Status (13)
Country | Link |
---|---|
US (1) | US3871628A (it) |
JP (1) | JPS5513887B2 (it) |
AT (1) | AT337586B (it) |
AU (1) | AU477116B2 (it) |
CA (1) | CA989817A (it) |
CH (1) | CH557226A (it) |
DE (1) | DE2259752C2 (it) |
FI (1) | FI55136C (it) |
FR (1) | FR2162596B1 (it) |
GB (1) | GB1405607A (it) |
IT (1) | IT975979B (it) |
NO (1) | NO139291C (it) |
SE (1) | SE358583B (it) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4298288A (en) * | 1980-01-25 | 1981-11-03 | Anthony Industries, Inc. | Mobile concreting apparatus and method |
US4669886A (en) * | 1984-03-13 | 1987-06-02 | B.M.I. B.V. | Apparatus for preparing a mixture |
US4855960A (en) * | 1982-04-30 | 1989-08-08 | Janssen Wilhelmus G E | Process and apparatus for the preparation of mortars |
US5354127A (en) * | 1990-04-10 | 1994-10-11 | William Del Zotto | Segmented mixing auger |
US5654352A (en) * | 1995-05-16 | 1997-08-05 | Maxflow Environmental Corp. | Air-entraining agent and method of producing same |
EP1679131A1 (de) * | 2005-01-05 | 2006-07-12 | Mario Kevekordes | Vorrichtung zum Aufbereiten von Bodenaushub |
US20090229707A1 (en) * | 2008-03-13 | 2009-09-17 | Royce Innovations, Llc | Concrete funnel and placement system |
US20090229706A1 (en) * | 2008-03-13 | 2009-09-17 | Trevor Royce | Funnel-Type Apparatus Removably Securable to a Concrete Chute |
ES2334417A1 (es) * | 2007-09-10 | 2010-03-09 | Ruben Martinez Fernandez | Maquina para la preparacion y transporte de morteros, cementos y pastas fraguables. |
ITVI20100023A1 (it) * | 2010-02-08 | 2011-08-09 | Max System S R L | Impianto per l'applicazione a spruzzo di impasti su superfici |
US10286573B2 (en) | 2015-07-21 | 2019-05-14 | Carl Cunningham | Mixing plant and related production methods |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4071226A (en) * | 1976-11-16 | 1978-01-31 | Miller Charles R | Portable concrete proportioning mixer |
GB2159722A (en) * | 1984-06-08 | 1985-12-11 | Aercrete | Mixing machines |
GB8701227D0 (en) * | 1987-01-21 | 1987-02-25 | Jones A L | Spraying machinery |
GB2206059B (en) * | 1987-02-13 | 1991-06-19 | Worcester Limited | Apparatus for producing aerated cementitious material |
US4922463A (en) * | 1988-08-22 | 1990-05-01 | Del Zotto Manufacturing Co. | Portable volumetric concrete mixer/silo |
DE4204330B4 (de) * | 1992-02-14 | 2006-05-04 | Putzmeister Ag | Fahrmischerpumpe |
ATA239993A (de) * | 1993-11-26 | 1994-08-15 | Zementwerk Leube Ges M B H | Zement zur spritzbetonherstellung sowie verfahren und vorrichtung zum herstellen von spritzbeton aus diesem zement |
US20070189109A1 (en) * | 2006-02-15 | 2007-08-16 | Cemen Tech, Inc. | Improved volumetric cement mixer |
JP6644453B1 (ja) * | 2019-03-04 | 2020-02-12 | 阪神高速技術株式会社 | 移動式バッチャープラント |
CN117549435B (zh) * | 2023-12-01 | 2024-06-25 | 江苏广亚高新材料有限公司 | 一种水泥混凝土生产线进料装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2756975A (en) * | 1953-10-21 | 1956-07-31 | August Pablo | Mixers, particularly mortar mixer |
US2806680A (en) * | 1955-08-23 | 1957-09-17 | August Pablo | Transportable concrete or mortar mixer |
US3306589A (en) * | 1965-06-16 | 1967-02-28 | Rupert H Uden | Concrete mixing machine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE163439C (it) * | ||||
BE495828A (it) * | 1950-03-31 | |||
DE859869C (de) * | 1950-11-30 | 1952-12-18 | Oskar Krafft | Kontinuierlich arbeitende Mischmaschine, insbesondere fuer Moertel u. dgl. |
DE934939C (de) * | 1951-04-26 | 1955-11-10 | Lauterberger Blechwarenfabrik | Mischmaschine |
SU363547A1 (ru) * | 1966-11-12 | 1972-12-25 | П. Н. Тоболов, Ю. А. Кригер, И. П. Литвинов, И. Г. Баширов | Установка непрерывного действия для приготовления жидкоподвижных формовочных |
-
1971
- 1971-12-10 SE SE15876/71A patent/SE358583B/xx unknown
-
1972
- 1972-01-12 JP JP577972A patent/JPS5513887B2/ja not_active Expired
- 1972-12-05 US US312385A patent/US3871628A/en not_active Expired - Lifetime
- 1972-12-05 FI FI3445/72A patent/FI55136C/fi active
- 1972-12-06 CH CH1773472A patent/CH557226A/xx not_active IP Right Cessation
- 1972-12-06 AT AT1036472A patent/AT337586B/de active
- 1972-12-06 DE DE2259752A patent/DE2259752C2/de not_active Expired
- 1972-12-07 IT IT70856/72A patent/IT975979B/it active
- 1972-12-07 AU AU49778/72A patent/AU477116B2/en not_active Expired
- 1972-12-07 CA CA158,362A patent/CA989817A/en not_active Expired
- 1972-12-07 GB GB5656672A patent/GB1405607A/en not_active Expired
- 1972-12-08 NO NO4535/72A patent/NO139291C/no unknown
- 1972-12-08 FR FR7243768A patent/FR2162596B1/fr not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2756975A (en) * | 1953-10-21 | 1956-07-31 | August Pablo | Mixers, particularly mortar mixer |
US2806680A (en) * | 1955-08-23 | 1957-09-17 | August Pablo | Transportable concrete or mortar mixer |
US3306589A (en) * | 1965-06-16 | 1967-02-28 | Rupert H Uden | Concrete mixing machine |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4298288A (en) * | 1980-01-25 | 1981-11-03 | Anthony Industries, Inc. | Mobile concreting apparatus and method |
US4855960A (en) * | 1982-04-30 | 1989-08-08 | Janssen Wilhelmus G E | Process and apparatus for the preparation of mortars |
US4669886A (en) * | 1984-03-13 | 1987-06-02 | B.M.I. B.V. | Apparatus for preparing a mixture |
US5354127A (en) * | 1990-04-10 | 1994-10-11 | William Del Zotto | Segmented mixing auger |
US5654352A (en) * | 1995-05-16 | 1997-08-05 | Maxflow Environmental Corp. | Air-entraining agent and method of producing same |
EP1679131A1 (de) * | 2005-01-05 | 2006-07-12 | Mario Kevekordes | Vorrichtung zum Aufbereiten von Bodenaushub |
ES2334417A1 (es) * | 2007-09-10 | 2010-03-09 | Ruben Martinez Fernandez | Maquina para la preparacion y transporte de morteros, cementos y pastas fraguables. |
US20090229707A1 (en) * | 2008-03-13 | 2009-09-17 | Royce Innovations, Llc | Concrete funnel and placement system |
US20090229706A1 (en) * | 2008-03-13 | 2009-09-17 | Trevor Royce | Funnel-Type Apparatus Removably Securable to a Concrete Chute |
US8336585B2 (en) | 2008-03-13 | 2012-12-25 | Royce Innovations, Llc | Concrete funnel and placement system |
ITVI20100023A1 (it) * | 2010-02-08 | 2011-08-09 | Max System S R L | Impianto per l'applicazione a spruzzo di impasti su superfici |
US10286573B2 (en) | 2015-07-21 | 2019-05-14 | Carl Cunningham | Mixing plant and related production methods |
Also Published As
Publication number | Publication date |
---|---|
JPS5513887B2 (it) | 1980-04-12 |
IT975979B (it) | 1974-08-10 |
SE358583B (it) | 1973-08-06 |
AT337586B (de) | 1977-07-11 |
AU4977872A (en) | 1974-06-13 |
CA989817A (en) | 1976-05-25 |
AU477116B2 (en) | 1976-10-14 |
NO139291C (no) | 1979-02-07 |
DE2259752A1 (de) | 1973-06-14 |
FR2162596B1 (it) | 1977-12-30 |
FI55136C (fi) | 1979-06-11 |
CH557226A (de) | 1974-12-31 |
GB1405607A (en) | 1975-09-10 |
ATA1036472A (de) | 1976-10-15 |
NO139291B (no) | 1978-10-30 |
JPS4865560A (it) | 1973-09-10 |
DE2259752C2 (de) | 1983-02-03 |
FI55136B (fi) | 1979-02-28 |
FR2162596A1 (it) | 1973-07-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3871628A (en) | Conveying and mixing arrangement, particularly for powdered and/or particulate masses | |
US4298288A (en) | Mobile concreting apparatus and method | |
JP7038103B2 (ja) | 多段連続ミキサーを用いた繊維強化セメント質スラリーの製造方法 | |
US7513963B2 (en) | Method for wet mixing cementitious slurry for fiber-reinforced structural cement panels | |
US4205919A (en) | Mixer for and method for mixing particulate constituents | |
US7524386B2 (en) | Method for wet mixing cementitious slurry for fiber-reinforced structural cement panels | |
CN102333624B (zh) | 将用于纤维增强的结构水泥板的水泥浆进料的改进方法及装置 | |
US6309570B1 (en) | Vacuum extrusion system for production of cement-based articles | |
US3905586A (en) | Mini-plant for batching and mixing materials | |
FI75518C (fi) | Anordning foer framstaellning av murbruk. | |
US4492478A (en) | Method and apparatus for applying mortar or concrete | |
CN110435011A (zh) | 混凝土移动生产设备 | |
US5433519A (en) | Method and apparatus for the application of mortar or concrete by spraying | |
US11440216B2 (en) | System and method for manufacturing multilayer claddings with a decorative layer | |
US5351630A (en) | Apparatus for conditioning ASTM class C fly ash | |
KR910001361B1 (ko) | 혼합장치(dispensing apparetus) | |
US5507988A (en) | Process and apparatus for forming a building block | |
US4004782A (en) | Machine for mixing aggregate and resin | |
GB2159722A (en) | Mixing machines | |
US4698366A (en) | Method for the manufacture of insulating porous shaped building articles | |
JPS5662534A (en) | Continuous shell-forming mixer | |
US3758034A (en) | Method for pneumatically placing semi-fluid materials | |
EP0403017B1 (en) | Mortar transport apparatus | |
RU12069U1 (ru) | Мини-завод по производству сухих строительных смесей | |
RU2794266C1 (ru) | Установка мобильная смесительная для производства материалов в дорожном строительстве |