WO1989010247A1 - Apparatus for preparing foamed concrete or other foamed products - Google Patents
Apparatus for preparing foamed concrete or other foamed products Download PDFInfo
- Publication number
- WO1989010247A1 WO1989010247A1 PCT/GB1989/000406 GB8900406W WO8910247A1 WO 1989010247 A1 WO1989010247 A1 WO 1989010247A1 GB 8900406 W GB8900406 W GB 8900406W WO 8910247 A1 WO8910247 A1 WO 8910247A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- mixing
- holes
- foamed
- vessel
- Prior art date
Links
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
- B28C5/38—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
- B01F25/102—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components wherein the vortex is created by two or more jets introduced tangentially in separate mixing chambers or consecutively in the same mixing chamber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F2025/91—Direction of flow or arrangement of feed and discharge openings
- B01F2025/919—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings
- B01F2025/9191—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component
Definitions
- This invention relates to apparatus for producing foamed concrete by continuously mixing the various constituents, including solids such as cement and sand, and water and a foaming agent to form a light-weight foamed product.
- the concrete products thus formed can be easily pumped over long distances for any desired use.
- a distinctive feature of the invention is the mixing means and method, wherein pressurised gas such as air is used to intimately mix the ingredients and to provide an aerated or foamed product, and the method is also applicable to the production of mixed or foamed plastics, or food products such as dough or confectionary.
- pressurised gas such as air
- the present invention provides apparatus for preparing a foamed product, which comprises: two pressure-resistant chambers each having an inlet for supply of a stream of pressurised gas and each containing an inner mixing vessel shaped to taper downwardly and having a plurality of spaced through-holes to allow pressurised gas passing through said holes to mix the contents of the vessel; the first chamber having means for supply of desired solid ingredients to the top of the mixing vessel and having an outlet at the bottom thereof for the aerated mixture produced, and the second chamber being arranged to receive the mixture leaving the outlet of the first chamber and having one or more inlet for receiving foaming agent and having an outlet at the bottom of the mixing vessel for delivery of the foamed product formed.
- each of the mixing vessels is that of an inverted truncated cone.
- the through-holes are preferably at an angle to the radius of the mixing vessel, which angle decreases for the holes closer to the outlet; the holes are also preferably at the angle to the vertical and they taper inwardly towards the inside surface of the vessel.
- an inlet for foaming agent and water is preferably provided at a collar around the base of the first chamber, in which collar these ingredients become mixed.
- the method of use of this apparatus comprises supplying the various ingredients including pressurised gas (normally air) to the respective inlets of the two chambers, causing the solid ingredients to be mixed in the first chamber by the action of the air, supplying foaming agent and water or other desired ingredients to mix with the pre-mix leaving the first chamber and supplying the resultant mixture to the second mixing chamber, and then removing the mixed finished aerated product from the outlet of the second chamber.
- pressurised gas normally air
- the pressurised gas entering each mixture has the effect of causing centrifugal turbulance in each mixing vessel.
- pressurised air for mixing has the advantages of eliminating the need for moving mechanical parts and reducing wear on the surfaces of the apparatus; the quantities of ingredients of the mixture can be metered so as to accurately determine the composition of the foamed product and thus the relative strength and weight thereof.
- the apparatus can be totally enclosed and virtually dust-free.
- Fig. 1 is an elevation of an entire mobile apparatus for making foamed concrete, viewed from one side;
- Fig. 2 is a view of the apparatus of Fig. 1 seen from above;
- Fig. 3 is a sectional view along the line III-III of Fig. 2; and Fig. 4 is a fragmentory horizontal cross-section of part of a mixing vessel of Fig. 3.
- a chassis (1) has road wheels (2) a braking handle (3) and preferably a vehicle body (4), the whole being arranged to serve as a trailer behind a motor vehicle.
- a chassis (1) has road wheels (2) a braking handle (3) and preferably a vehicle body (4), the whole being arranged to serve as a trailer behind a motor vehicle.
- storage containers (5, 5, 7, 8 and 9) for the ingredients sand, cement any other solid additive, water and foaming agent; the solid ingredients are connected by motor-driven helixes within supply lines (10, 11 and 12) to a mixing section, generally indicated as (13), only the top (14) of which is visible in Fig. 2.
- Loading ports (15) are provided in the sides of the body.
- the apparatus also includes hoses (16, 17) for supply by means of pumps (18, 19) of water and foaming agent respectively from their containers (8, 9).
- an engine (20) which is connected via a belt (21) to an air compressor (22), and which also drives the pumps (18, 19).
- a control panel. (25) which controls the engine and includes a flow meter to monitor the pumps (18, 19), an air pressure gauge and regulator and four on/off ball valves which control respectively the inputs of water, foaming agent, sand and cement to achieve desired mixing proportions and the clutches which control the speeds of the respective helices.
- the mixing section (13) is seen to be made up of two generally similar chambers (26, 28), each being closed to the atmosphere and made of high-density plastics or other suitable strong material resistant to air pressure, and each having an inlet (29 or 30) for supply of compressed air from the compressor (21).
- a conical mixing vessel 32 or 34 respectively, each of which is perforated by a plurality of machined through-holes arranged at regular intervals in rows over substantially its entire surface. The spacings between the holes depend on the circumference of the cone.
- the holes (35, 36) are preferably arranged at an angle ⁇ of about 45 to the horizontal, so that their upper ends lie within the cone, and they are preferably also at an angle 8 to the radius on the horizontal plane of the respective chamber, as seen in Fig. 4; this angle ⁇ is generally at 30° at the top of each vessel, decreasing towards the bottom of the cone. Moreover the holes taper inwardly towards the internal surface of each cona (32 or 34).
- the first, upper mixing chamber is closed at its upper end by the top (14), within which the supply lines (10, 11, 12) for the solid ingredients terminate, and at its lower end it communicates via an outlet (38) with the mixing vessel (34) within the lower chamber, which in turn has an outlet (40) at its lower end.
- a hollow collar (41) which is supplied at its outside with inlets (42, 43) for water and foaming agent, and has nozzles (44) opening around the outlet (38).
- a jet pump which can be of a known commercial type, such as supplied by Genflo Pumps Limited of Stanford, so that the hopper inlet of the pump encloses the outlet of the lower chamber; the jet pump has a supply (47) for compressed air or water, and an outlet (48) for delivery of the concrete produced.
- sand and cement are fed from their containers (5, 6) via the motor driven helices within the supply lines (10, 11), and any other optional filler such as pulverised fuel ash or polystyrene beads is fed from container (7) via line (12), each to the top of the mixing chamber (26).
- High-pressure compressed air is pumped into the inlets (29 and 30) and causes centrifugal turbulence in each mixing zone, so as to intimately admix the solids as they pass down the upper conical mixing chamber.
- Water and foaming agent are pumped through hoses (16, 17) into the annular chamber within the collar (41), and are there mixed and delivered through the plurality of nozzles (44) and are sprayed therefrom so as to moisten and mix with the particles of sand/cement pre-mix passing through the outlet (38); this mixture is further mixed and aarated in the lower mixing chamber by the air passing through the respective throughholes in the mixing vessel (34) thereof, and the resulting foamed concrete mixture is sucked out of the lower outlet (40) by the jet pump (46), fed by compressed air or water (47) also from the compressor (22).
- the mixture formed is pumped from outlet (48) to a location where the concrete is to be used.
- the jet pump (46) is driven in usual manner by either a gas or liquid.
- the speed of the mixing and the level of the components being mixed inside each of the conical mixing vessels (26, 28) is controlled by the spacing and the angles of the through-holes (35, 36); the more numerous the holes, the faster the contents are spun, and the closer to 90 is the angle of the hole to the angle 3 to the radius of the chambers, the faster does the mixture fall through the mixing vessels.
- the two mixing chambers are placed side by si de on the the chassis, if space permits, in which case a further jet pump is required at the base of the first outlet (38) to convey the pre-mix through a suitable conduit to the top of the second mixing chamber.
- the inlets (42, 43 ) for the water and foaming agent may be arranged so that a mixture thereof enters the main mixing vessel (34) from above, or a further mixing vessel may be provided separately to pre-mix these components.
- the apparatus shown is self-contained' mobile, and is easily supplied with the required ingredients, either manually or in conjunction with automatic loading systems. It can be totally enclosed so as to operate in all weathers and be relatively sound proof. It can be operated by a single person who adjusts the input and output and ensures replenishment of reservoirs, and it is easily constructed, maintained and cleaned.
- Foamed concrete thus produced is light-weight, highly resistant to water and fire, has high strength, exhibits only minute creep or shrinkage is very stable and undergoes very little change in density when it is poured and dried. It also has high compressive and bending strengths, and is thermally and acoustically insulating. It requires a low water content and sets and dries more quickly than known light-weight concrete mixtures and is suitable for many uses, including for the purposes described in my UK Patent Applications Nos. 8708774 and 8722129.
- the concrete has low water absorption and can set and be used under water, e.g. for marine construction or in under-water tunnels. It is also useful as a traditional roofing material or for filling moulds either at ground level or at a height, or for building road bases or fabricating lightweight building blocks.
- the height of the cone is about 30cm and the through-holes (35, 36) can taper from 3mm diameter at the outside of the cone to 1.5mm at the internal surface thereof, for a wall thickness of about 3mm, and with an angle ⁇ which commences at 30 at the top, and decreasing by 5 every 5cm downwardly.
- the speed at which the solid components are fed to the top of the first chamber is controlled so as to provide exact desired mixing proportions and thus to allow production of concrete of densities from 2200 kg/m to 400 kg/m on the basis of pure cement, as desired.
- the results obtained by the use of varying proportions of ingredients are shown in the following table:
- a suitable foaming agent is a hydrolyzed protein, such as known under the Trade Name "Nicerol”, or a known resin soap.
- the number of mixing chambers, angle of the conical mixing vessels, and placing of the through-holes and inlets will be varied as necessary to provide the desired mixing effects and the desired products, whilst the use of the compressed air will again provide an excellent centrifugal mixing effect.
- the product formed must remain mobile until it is removed from the apparatus by the jet pump (45).
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
An apparatus for producing foamed concrete by continuously mixing the ingredients comprises, mounted on a road vehicle chassis, a mixing section of two similar chambers (26, 28), each having a pressure-resistant outer casing, an inlet (29, 30), for supply of compressed air from a compressor, and containing an inner mixing vessel (32, 34) tapering downwardly and having a plurality of spaced through-holes (35, 36), preferably arranged at an angle of about 45° to the horizontal, and preferably also at an angle to the radius of the chamber (see Fig. 4), the holes allowing pressurised gas to mix the contents of the chamber. The apparatus may include containers for sand, cement and any other optional ingredients (Fig. 2) and means for supplying them to the top of the mixing chamber via motor-driven helices within supply lines (10, 11, 12). In use, a pre-mix is formed in the upper chamber, and water and foaming agent are supplied through nozzles (44) in a collar connecting the chambers, and the mixture is further mixed and aerated in the lower chamber (28) by air passing through the holes (36), and the resulting foamed concrete mixture is sucked out of a lower outlet (40) by a jet pump (46). Alternatively, the two mixing chambers are placed side by side on the chassis, with a further jet pump to convey the premix to the top of the second chamber. The self-contained apparatus is mobile and easily operated, and the foamed concrete thus produced is light-weight, resistant to water and fire, and strong and stable.
Description
APPARATUS FOR PREPARING FOAMED CONCRETE OR OTHER FOAMED PRODUCTS
This invention relates to apparatus for producing foamed concrete by continuously mixing the various constituents, including solids such as cement and sand, and water and a foaming agent to form a light-weight foamed product. The concrete products thus formed can be easily pumped over long distances for any desired use.
A distinctive feature of the invention is the mixing means and method, wherein pressurised gas such as air is used to intimately mix the ingredients and to provide an aerated or foamed product, and the method is also applicable to the production of mixed or foamed plastics, or food products such as dough or confectionary.
The production of light-weight foamed concrete has hitherto usually been carried out batchwise. Although mixing devices such as described in GB- A-20998079 have been proposed for continuously mixing foamed concrete by mechanical means, production therewith has tended to be erratic. I have devised a new apparatus and method for such purpose, which is carried out continuously and uniformly.
The present invention provides apparatus for preparing a foamed product, which comprises: two pressure-resistant chambers each having an inlet for supply of a stream of pressurised gas and each containing an inner mixing vessel shaped to taper downwardly and having a plurality of spaced through-holes to allow pressurised gas passing through said holes to mix the contents of the vessel; the first chamber having means for supply of desired solid ingredients to the top of the mixing vessel and having an outlet at the bottom thereof for the aerated mixture produced, and the second chamber being arranged to receive the mixture leaving the outlet of the first chamber and having one or more inlet for receiving foaming agent and having an outlet at the bottom of the mixing vessel for
delivery of the foamed product formed.
Preferably the form of each of the mixing vessels is that of an inverted truncated cone.
The through-holes are preferably at an angle to the radius of the mixing vessel, which angle decreases for the holes closer to the outlet; the holes are also preferably at the angle to the vertical and they taper inwardly towards the inside surface of the vessel.
For the mixing of cement, an inlet for foaming agent and water is preferably provided at a collar around the base of the first chamber, in which collar these ingredients become mixed.
The method of use of this apparatus comprises supplying the various ingredients including pressurised gas (normally air) to the respective inlets of the two chambers, causing the solid ingredients to be mixed in the first chamber by the action of the air, supplying foaming agent and water or other desired ingredients to mix with the pre-mix leaving the first chamber and supplying the resultant mixture to the second mixing chamber, and then removing the mixed finished aerated product from the outlet of the second chamber.
In this method, the pressurised gas entering each mixture has the effect of causing centrifugal turbulance in each mixing vessel. The use of pressurised air for mixing has the advantages of eliminating the need for moving mechanical parts and reducing wear on the surfaces of the apparatus; the quantities of ingredients of the mixture can be metered so as to accurately determine the composition of the foamed product and thus the relative strength and weight thereof. The apparatus can be totally enclosed and virtually dust-free.
The invention is illustrated by way of example in the accompanying drawings, in which: Fig. 1 is an elevation of an entire mobile apparatus for making foamed concrete, viewed from one side;
Fig. 2 is a view of the apparatus of Fig. 1 seen from above;
Fig. 3 is a sectional view along the line III-III of Fig. 2; and Fig. 4 is a fragmentory horizontal cross-section of part of a mixing vessel of Fig. 3.
Referring to Fig. 1, a chassis (1) has road wheels (2) a braking handle (3) and preferably a vehicle body (4), the whole being arranged to serve as a trailer behind a motor vehicle. As seen in Fig. 2, within the body are are mounted storage containers (5, 5, 7, 8 and 9) for the ingredients sand, cement any other solid additive, water and foaming agent; the solid ingredients are connected by motor-driven helixes within supply lines (10, 11 and 12) to a mixing section, generally indicated as (13), only the top (14) of which is visible in Fig. 2. Loading ports (15) are provided in the sides of the body.
The apparatus also includes hoses (16, 17) for supply by means of pumps (18, 19) of water and foaming agent respectively from their containers (8, 9).
Also mounted on the chassis (1) is an engine (20) which is connected via a belt (21) to an air compressor (22), and which also drives the pumps (18, 19). On the body (4) is a control panel. (25) which controls the engine and includes a flow meter to monitor the pumps (18, 19), an air pressure gauge and regulator and four on/off ball valves which control respectively the inputs of water, foaming agent, sand and cement to achieve desired mixing proportions and the clutches which control the speeds of the respective helices. Referring to Fig. 3, the mixing section (13) is seen to be made up of two generally similar chambers (26, 28), each being closed to the atmosphere and made of high-density plastics or other suitable strong material resistant to air pressure, and each having an inlet (29 or 30) for supply of compressed air from the compressor (21). Within each chamber is a conical mixing vessel (32 or 34)
respectively, each of which is perforated by a plurality of machined through-holes arranged at regular intervals in rows over substantially its entire surface. The spacings between the holes depend on the circumference of the cone. The holes (35, 36) are preferably arranged at an angle α of about 45 to the horizontal, so that their upper ends lie within the cone, and they are preferably also at an angle 8 to the radius on the horizontal plane of the respective chamber, as seen in Fig. 4; this angle β is generally at 30° at the top of each vessel, decreasing towards the bottom of the cone. Moreover the holes taper inwardly towards the internal surface of each cona (32 or 34).
The first, upper mixing chamber is closed at its upper end by the top (14), within which the supply lines (10, 11, 12) for the solid ingredients terminate, and at its lower end it communicates via an outlet (38) with the mixing vessel (34) within the lower chamber, which in turn has an outlet (40) at its lower end. Around the outlet (38) of the upper chamber is a hollow collar (41) which is supplied at its outside with inlets (42, 43) for water and foaming agent, and has nozzles (44) opening around the outlet (38).
Beneath the outlet (40) of the lower mixing chamber is attached a jet pump (46), which can be of a known commercial type, such as supplied by Genflo Pumps Limited of Stanford, so that the hopper inlet of the pump encloses the outlet of the lower chamber; the jet pump has a supply (47) for compressed air or water, and an outlet (48) for delivery of the concrete produced. In use, sand and cement are fed from their containers (5, 6) via the motor driven helices within the supply lines (10, 11), and any other optional filler such as pulverised fuel ash or polystyrene beads is fed from container (7) via line (12), each to the top of the mixing chamber (26). High-pressure compressed air is pumped into the inlets
(29 and 30) and causes centrifugal turbulence in each mixing zone, so as to intimately admix the solids as they pass down the upper conical mixing chamber. Water and foaming agent are pumped through hoses (16, 17) into the annular chamber within the collar (41), and are there mixed and delivered through the plurality of nozzles (44) and are sprayed therefrom so as to moisten and mix with the particles of sand/cement pre-mix passing through the outlet (38); this mixture is further mixed and aarated in the lower mixing chamber by the air passing through the respective throughholes in the mixing vessel (34) thereof, and the resulting foamed concrete mixture is sucked out of the lower outlet (40) by the jet pump (46), fed by compressed air or water (47) also from the compressor (22). The mixture formed is pumped from outlet (48) to a location where the concrete is to be used. The jet pump (46) is driven in usual manner by either a gas or liquid.
The speed of the mixing and the level of the components being mixed inside each of the conical mixing vessels (26, 28) is controlled by the spacing and the angles of the through-holes (35, 36); the more numerous the holes, the faster the contents are spun, and the closer to 90 is the angle of the hole to the angle 3 to the radius of the chambers, the faster does the mixture fall through the mixing vessels.
In an alternative arrangement, the two mixing chambers are placed side by si de on the the chassis, if space permits, in which case a further jet pump is required at the base of the first outlet (38) to convey the pre-mix through a suitable conduit to the top of the second mixing chamber. Also, the inlets (42, 43 ) for the water and foaming agent may be arranged so that a mixture thereof enters the main mixing vessel (34) from above, or a further mixing vessel may be provided separately to pre-mix these components. The apparatus shown is self-contained' mobile, and is easily supplied with the required ingredients, either manually or in conjunction with automatic loading systems.
It can be totally enclosed so as to operate in all weathers and be relatively sound proof. It can be operated by a single person who adjusts the input and output and ensures replenishment of reservoirs, and it is easily constructed, maintained and cleaned.
Foamed concrete thus produced is light-weight, highly resistant to water and fire, has high strength, exhibits only minute creep or shrinkage is very stable and undergoes very little change in density when it is poured and dried. It also has high compressive and bending strengths, and is thermally and acoustically insulating. It requires a low water content and sets and dries more quickly than known light-weight concrete mixtures and is suitable for many uses, including for the the purposes described in my UK Patent Applications Nos. 8708774 and 8722129. The concrete has low water absorption and can set and be used under water, e.g. for marine construction or in under-water tunnels. It is also useful as a traditional roofing material or for filling moulds either at ground level or at a height, or for building road bases or fabricating lightweight building blocks.
Suitable sizes for the conical mixing vessels (26 and 27) are, for three sizes of mixing vessel, for the diameters A to D shown in Fig. 3: largest size, A = 51cm, B = 41cm, C = 84cm, D = 68cm middle size, A = 41cm, B = 30.5cm, C = 61cm, D = 46cm smallest size A = 30.5cm, B = 20cm, C = 46cm, D = 30.5cm.
For all these models, the height of the cone is about 30cm and the through-holes (35, 36) can taper from 3mm diameter at the outside of the cone to 1.5mm at the internal surface thereof, for a wall thickness of about 3mm, and with an angle β which commences at 30 at the top, and decreasing by 5 every 5cm downwardly.
The speed at which the solid components are fed to the top of the first chamber is controlled so as to provide exact desired mixing proportions and thus to allow production of concrete of densities from 2200 kg/m to 400 kg/m on the basis of pure cement, as desired.
The results obtained by the use of varying proportions of ingredients are shown in the following table:
Density Cement Sand Water Concentrate Compressive Tensile Mass/vol (Kilos) (Kilos) (Liters) (Liters) Strength Strength
(kg/m2) 2200 410 1730 160 .220 30 N/mm2 3.70 N/mm2
2200 410 1530 160 .250 26 N/mm2 3.40 N/mm2
1800 400 1340 160 .250 22 N/mm2 3.00 N/mm2
1600 400 1140 160 .350 18 N/mm2 2.50 N/mm2
1400 400 940 160 .450 14 N/mm2 1.90 N/mm2
1200 360 810 140 .550 11 N/mm2 1.20 N/mm2
1000 360 610 140 .650 8 N/mm2 0.80 N/mm2
800 360 410 160 .750 5 N/mm2 0.40 N/mm2
600 360 190 160 .825 4 N/mm2 0.30 N/mm2
400 360 0 160 .900 3 N/mm2 0.18 N/mm2
The costs of these mixtures increase with the density thereof.
A suitable foaming agent is a hydrolyzed protein, such as known under the Trade Name "Nicerol", or a known resin soap.
For use in mixing products other than concrete, the number of mixing chambers, angle of the conical mixing vessels, and placing of the through-holes and inlets will be varied as necessary to provide the desired mixing effects and the desired products, whilst the use of the compressed air will again provide an excellent centrifugal mixing effect. The product formed must remain mobile until it is removed from the apparatus by the jet pump (45).
Claims
1. Apparatus for preparing foamed concrete or other foamed products, which comprises: two chambers, each being a pressure-resistant outer chamber having an inlet for supply of a stream of pressurised gas and containing an inner mixing vessel shaped to taper downwardly and having a plurality of spaced through-holes to allow the pressurised gas to mix its contents; the first chamber having means for supply of desired solid ingredients to the top of the mixing vessel and having an outlet at the bottom thereof; the second chamber being arranged to receive the mixture leaving the outlet of the first chamber and also having one or more inlet for receiving water and foaming agent, and having an outlet at the bottom of the vessel for delivery of the foamed product formed.
2. Apparatus as claimed in Claim 1, wherein the mixing vessel of either or both of said vessels is in the form of an inverted truncated cone.
3. Apparatus as claimed in Claim 1 or 2, wherein said through-holes in the mixing vessel are formed at an angle to the radius of the vessel.
4. Apparatus as claimed in any one of the preceding claims, wherein said through-holes in the mixing vessel are formed at an angle to the vertical.
5. Apparatus as claimed in any one of the preceding claims, wherein said through-holes taper inwardly towards the inside surface of the vessel wall.
6. Apparatus as claimed in any preceding claim, which includes containers for supply of compressed air and of the other components to be mixed and pumps and/or motor driven enclosed concentric helixes for delivery of the various materials.
7. Apparatus as claimed in any preceding claim, which includes a jet pump for pumping the foamed product produced.
8. Apparatus according to any preceding claim, which is mounted on a mobile trailer.
9. Apparatus as claimed in Claim 1, substantially as hereinbefore described with reference to the accompanying drawings.
10. A method of mixing concrete or other foamed product, which comprises supplying solid ingredients and water to the respective supply vessels of apparatus according to any preceding claim, supplying gas under pressure to the respective gas inlet of each mixing chamber, pre-mixing the solids in the first mixer, supplying the water and foaming agent to mix with the pre-mix leaving the first chamber and supplying the resultant mixture to the second mixing chamber, then removing the finished product from the outlet of the second chamber.
11. A method as claimed in Claim 10, wherein the pressurised gas causes centrifugal turbulence in each mixing vessel.
12. Foamed concrete or other product produced by the method of Claim 10 or 11.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8809284A GB2217221B (en) | 1988-04-20 | 1988-04-20 | Apparatus for preparing foamed concrete or other foamed products |
GB8809284.6 | 1988-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1989010247A1 true WO1989010247A1 (en) | 1989-11-02 |
Family
ID=10635487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1989/000406 WO1989010247A1 (en) | 1988-04-20 | 1989-04-18 | Apparatus for preparing foamed concrete or other foamed products |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2217221B (en) |
WO (1) | WO1989010247A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0517207A1 (en) * | 1991-06-06 | 1992-12-09 | RUME MASCHINENBAU GmbH | Method and device to make construction foam, in particular cement foam |
KR100903275B1 (en) * | 2007-11-15 | 2009-06-17 | 주식회사 원건설 | Tne traveling manufacturing equipment of the foaming concrete |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202009017709U1 (en) * | 2009-12-31 | 2011-09-02 | Heinz-Dieter Matuschak | Rotary valve and conveyor for conveying bulk material |
CN105150381B (en) * | 2015-10-22 | 2017-12-08 | 常胜 | A kind of foam cement blender |
CN107932720B (en) * | 2017-12-09 | 2020-04-10 | 广西兴邦建设有限公司 | Construction silt mixing arrangement |
CN112297235A (en) * | 2020-10-29 | 2021-02-02 | 洪玲玲 | Mixing drum for foam concrete preparation equipment |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1362242A (en) * | 1916-08-30 | 1920-12-14 | Ransome Concrete Machinery Co | Pneumatic concrete-mixer and paver |
GB1115288A (en) * | 1965-06-14 | 1968-05-29 | Equipment Engineers Inc | Methods and apparatus for effecting dispersions of gas in liquid materials |
DE1300512B (en) * | 1956-03-31 | 1969-08-07 | Fritz Dr Ing | Device for mixing and performing chemical reactions using a combustion chamber |
US3994480A (en) * | 1971-10-25 | 1976-11-30 | Albright & Wilson Limited | Mixing method |
DE2617612A1 (en) * | 1976-04-22 | 1977-11-10 | Roland Offsetmaschf | Mixer for various components e.g. for prodn. of foundry sand - with airless high pressure nozzles and two rotary mixer cages |
FR2377837A1 (en) * | 1977-01-19 | 1978-08-18 | Supraton Zucker | METHOD AND DEVICE FOR MIXING PULVERULENT DRY SUBSTANCES AND / OR LIQUID MEDIA WITH ONE OR MORE LIQUIDS |
GB2067908A (en) * | 1980-01-25 | 1981-08-05 | Neptune Microfloc Inc | Method and apparatus for wetting powder or granular material |
GB2091572A (en) * | 1981-01-23 | 1982-08-04 | Thermal Structures Ltd | Production of foamed concrete |
US4415275A (en) * | 1981-12-21 | 1983-11-15 | Dietrich David E | Swirl mixing device |
-
1988
- 1988-04-20 GB GB8809284A patent/GB2217221B/en not_active Expired - Lifetime
-
1989
- 1989-04-18 WO PCT/GB1989/000406 patent/WO1989010247A1/en unknown
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1362242A (en) * | 1916-08-30 | 1920-12-14 | Ransome Concrete Machinery Co | Pneumatic concrete-mixer and paver |
DE1300512B (en) * | 1956-03-31 | 1969-08-07 | Fritz Dr Ing | Device for mixing and performing chemical reactions using a combustion chamber |
GB1115288A (en) * | 1965-06-14 | 1968-05-29 | Equipment Engineers Inc | Methods and apparatus for effecting dispersions of gas in liquid materials |
US3994480A (en) * | 1971-10-25 | 1976-11-30 | Albright & Wilson Limited | Mixing method |
DE2617612A1 (en) * | 1976-04-22 | 1977-11-10 | Roland Offsetmaschf | Mixer for various components e.g. for prodn. of foundry sand - with airless high pressure nozzles and two rotary mixer cages |
FR2377837A1 (en) * | 1977-01-19 | 1978-08-18 | Supraton Zucker | METHOD AND DEVICE FOR MIXING PULVERULENT DRY SUBSTANCES AND / OR LIQUID MEDIA WITH ONE OR MORE LIQUIDS |
GB2067908A (en) * | 1980-01-25 | 1981-08-05 | Neptune Microfloc Inc | Method and apparatus for wetting powder or granular material |
GB2091572A (en) * | 1981-01-23 | 1982-08-04 | Thermal Structures Ltd | Production of foamed concrete |
US4415275A (en) * | 1981-12-21 | 1983-11-15 | Dietrich David E | Swirl mixing device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0517207A1 (en) * | 1991-06-06 | 1992-12-09 | RUME MASCHINENBAU GmbH | Method and device to make construction foam, in particular cement foam |
KR100903275B1 (en) * | 2007-11-15 | 2009-06-17 | 주식회사 원건설 | Tne traveling manufacturing equipment of the foaming concrete |
Also Published As
Publication number | Publication date |
---|---|
GB8809284D0 (en) | 1988-05-25 |
GB2217221B (en) | 1991-12-11 |
GB2217221A (en) | 1989-10-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4185923A (en) | Method and apparatus for producing insulating material | |
CA1092599A (en) | Impinging liquid and fluid streams in a continuous flow static mixer | |
US4455271A (en) | Foamed gypsum wallboard | |
US3776702A (en) | Apparatus for mineral-filled foam production | |
US2864714A (en) | Method of producing aerated cementitious material | |
US2887275A (en) | Apparatus for producing aerated cementitious material | |
JPH07504855A (en) | Foam manufacturing method and device | |
US4499561A (en) | Apparatus for continuously producing a dry material and liquid slurry | |
WO1989010247A1 (en) | Apparatus for preparing foamed concrete or other foamed products | |
US3547412A (en) | Production of lightweight concrete | |
US20140029371A1 (en) | Foam Production System and Method | |
CA2115740A1 (en) | Production of composite structures using lightweight low cost matrix extender materials | |
JPH0211222B2 (en) | ||
CN1248196A (en) | Method and device for producing polyurethanes containing filling materials | |
US3779519A (en) | Concrete placement | |
US3207485A (en) | Apparatus for producing liquid mixture | |
US4199547A (en) | Device for producing foam plastics | |
US3563517A (en) | Cement slurry mixing system | |
WO1999054104A1 (en) | Method of preparing cement mixtures and mixer to be used for the implementation of the method | |
CN102172483A (en) | Method and apparatus for making composite solid surface article and composite solid surface article containing large particles | |
RU2243892C1 (en) | Mixing-grinding plant | |
US3669418A (en) | Method of spraying concrete | |
US3434698A (en) | Fluid mixing,moving and atomizing methods and apparatus | |
RU2109629C1 (en) | Method of preparation of cellular building mixes based on gypsum-containing mineral binder and device for its realization | |
US4443562A (en) | Method and apparatus for producing lightweight cellular materials and structural articles |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): DE JP SE SU US |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |