US3480260A - Method and means for mixing a mass of concrete or other material - Google Patents

Method and means for mixing a mass of concrete or other material Download PDF

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Publication number
US3480260A
US3480260A US680886A US3480260DA US3480260A US 3480260 A US3480260 A US 3480260A US 680886 A US680886 A US 680886A US 3480260D A US3480260D A US 3480260DA US 3480260 A US3480260 A US 3480260A
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United States
Prior art keywords
mixing
mass
fluid
paddles
concrete
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
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US680886A
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English (en)
Inventor
Erik Valdemar Fejmert
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Individual
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Individual
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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
    • B28C5/46—Arrangements for applying super- or sub-atmospheric pressure during mixing; Arrangements for cooling or heating during mixing, e.g. by introducing vapour
    • B28C5/466—Heating, e.g. using steam
    • 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
    • B28C5/16—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 the stirrers having motion about a vertical or steeply inclined axis
    • B28C5/163—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 the stirrers having motion about a vertical or steeply inclined axis in annularly-shaped containers
    • 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
    • B28C7/12—Supplying or proportioning liquid ingredients
    • B28C7/126—Supply means, e.g. nozzles

Definitions

  • the invention relates to a method and means for mixing concrete, mortar and other materials in a fiat-bottomed mixing tank with an upright peripheral wall, which may be cylindrical, and in some cases a coaxial upright inner wall, defining a mixing space through which paddles are driven to effect the mixing.
  • the admission of humidity for attaining a desired consistency of the mass of material to be mixed in the manufacture of concrete is usually accomplished by dumping a previously measured quantity of water directly on the materials in the mixing tank from above, but this results in the often great amount of water which is used impinging on the upper layer of the mass and causing soaking and separation of the constituents of the mass. Also the even distribution of the humidity in the mass cannot be obtained until the water has worked down towards the bottom, and around the mixing space where the paddles are working. Moreover, the consistency of the mass cannot be properly measured by reference to the quantity of water added, because of the variable amount of moisture already held by the materials, especially when they are stored in the open air.
  • the object of the invention is to mitigate these various disadvantages.
  • the method of mixing concrete, mortar or other materials in a fiat-bottomed mixing tank with an upright peripheral wall defining a mixing space through which paddles are driven to effect the mixing which involves injecting fluid, at a selected temperature and pressure, through the upright wall in spaced positions around its periphery, into the mass of material being worked by the paddles. In this manner penetration of the mass of material by the fluid is facilitated.
  • the method also involves injecting the fluid through the second upright wall in spaced positions around its periphery into the mass of material being worked by the paddles.
  • the penetration by the fluid "ice is still further facilitated by injecting it into the mass of material from both sides of the annular mixing space.
  • the injection of the fluid can be effected at more than one level into the mass of material it is preferred to effect it only at a level which is just above that of the flat bottom of the tank.
  • the fluid to be injected can be water or steam.
  • An estimation of the grade of moisture of the batch can be achieved by this method as the variation of the consistency of the mixture is in a certain degree proportional to the injection pressure of the moisture, and this can be established by means of electronic measurement.
  • the injection of the fluid can also be used for cleaning the mixing tank when empty.
  • the invention also includes a mixing apparatus for performing the above method, and according to a still further feature of the invention it comprises apparatus including a fiat-bottomed mixing tank with an upright peripheral wall defining a mixing space through which paddles are driven to effect the mixing, a plurality of jets extending through the (or each, as appropriate) upright wall in spaced positions around its periphery, and pipes for supplying fluid at a selected temperature and pressure to the jets so that the latter inject the fluid into the mass of material being worked by the paddles.
  • the apparatus has the jets mounted in recesses in the angles between the bottom wall and the (or each, as appropriate) upright wall.
  • FIGURE I is a diagrammatic vertical section through one form of apparatus for performing the method
  • FIGURE II is a section on the line AA of FIGURE I.
  • FIGURE III is a section on the line B-B of FIGURE I showing one of the jets for the injection of the fluid.
  • the tank 1 has a flat bottom 1a and an upright outer peripheral wall 1b which is preferably cylindrical.
  • the bottom 1a also supports an upright inner peripheral wall 2 coaxially within wall 1b, and this inner wall is also preferably cylindrical so as with the outer wall to define an" annular mixing space.
  • the inner wall 2 supports through bearings a rotatable member 3 which is driven in any suitable way and supports arms 4 carrying paddles 5 for mixing a charge of material placed in the mixing space.
  • the machine is of a known type.
  • pipes 6, for supplies of fluid are arranged around the outside of the outer wall 1b and the inside of the inner wall 2, and are connected to nozzles 7 for delivering jets of the fluid in both directions across the annular mixing space.
  • fluid e.g., water or steam, or both
  • nozzles 7 for delivering jets of the fluid in both directions across the annular mixing space.
  • the nozzles 7 are arranged in the angles between the bottom la of the tank and its upright walls 1b and 2, and may be formed in rings 8 suitably held in position.
  • the pipes 6, which are shown as being of rectangular cross-section, are provided with a circumferential baflle 9 to ensure that fluid delivered to the pipes at 10 shall not enter the nozzles by dynamic pressure but solely due to the static pressure it develops in the pipes.
  • the nozzles can be controlled individually by means (not shown) and the number of them to be used can be adapted to the desired period for the injection of the water to take place, and in relevant cases for the steam to flow attaining the desired temperature of the concrete.
  • Apparatus for mixing concrete, mortar or like material by agitating the material whilst injecting fluid into the material from a position below the surface of the material wherein the improvement comprises a mixing tank having a flat bottom and an upright Wall defining a mixing space, paddles supported to be driven through the mixing space to effect the mixing of material, a plurality of nozzles extending through the upright wall adjacent the flat bottom below the surface of the material, said nozzles spaced in positions around the periphery of the upright wall to inject fluid directly into the mass of the material being worked by said paddles, and pipes for supplying said. fluid to said nozzles.
  • Apparatus according to claim 1 including an annular fillet member in the corner between the flat bottom and the lower end of the upright wall, said annular fillet member defining said nozzles.
  • Apparatus for mixing concrete, mortar or like material by agitating the material whilst injecting fluid into the material from a position below the surface of the material wherein the improvement comprises a mixing tank with a flat bottom and first and second coaxial upright walls defining a mixing space, paddles supported to be driven through the mixing space to effect the mixing of material, a plurality of nozzles extending through both said upright walls adjacent the flat bottom below the surface of the material, said nozzles spaced in positions around the periphery of each upright wall to inject fluid directly into the mass of material being worked by said paddles, and pipes for supplying said fluid to said nozzles.
  • Apparatus according to claim 3 including annular fillet members in the corners between the flat bottom wall and the lower end of the upright Walls, said annular fillet members defining said nozzles.
  • a method of mixing concrete, mortar or like material by agitating the material Whilst injecting fluid into the materialfrom a position below the surface of the material to ensure substantially even distribution of the fluid throughout the material, wherein the improvement comprises injecting steam into the material.
  • a method of mixing concrete, mortar or like material by agitating the material whilst injecting fluid into the material from a position below the surface of the material to ensure substantially even distribution of the fluid throughout the material, wherein the improvement comprises injecting solid material of fine particle size into said material together with said fluid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
US680886A 1966-11-16 1967-11-06 Method and means for mixing a mass of concrete or other material Expired - Lifetime US3480260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15656/66A SE319717B (fr) 1966-11-16 1966-11-16

Publications (1)

Publication Number Publication Date
US3480260A true US3480260A (en) 1969-11-25

Family

ID=20301007

Family Applications (1)

Application Number Title Priority Date Filing Date
US680886A Expired - Lifetime US3480260A (en) 1966-11-16 1967-11-06 Method and means for mixing a mass of concrete or other material

Country Status (5)

Country Link
US (1) US3480260A (fr)
DE (1) DE1683824C3 (fr)
FR (1) FR1547818A (fr)
GB (1) GB1167940A (fr)
SE (1) SE319717B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3744768A (en) * 1971-08-30 1973-07-10 Nat Eng Co Mixer system
US4378162A (en) * 1979-02-22 1983-03-29 Bracegirdle P E Process for making asphalt concrete
US5100239A (en) * 1986-12-19 1992-03-31 Shimizu Construction Co., Ltd. Method of manufacturing concrete

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60129129A (ja) * 1983-12-16 1985-07-10 Nitto Chem Ind Co Ltd 水溶性重合体含水ゲル粒子の撹拌装置
FR2899494B1 (fr) * 2006-04-07 2008-06-06 Couvrot Sa Malaxeur a cuve fixe, notamment destine au melange de composants humides ou secs, pour l'obtention de beton.
WO2013107451A1 (fr) * 2012-01-20 2013-07-25 Haarup Maskinfabrik A/S Mélangeur en discontinu pour mélanger le béton et procédé permettant de mélanger le béton
CN106142346A (zh) * 2016-08-02 2016-11-23 太仓圣广仁自动化设备有限公司 一种混凝土搅拌机械装置
CN112706295B (zh) * 2020-12-28 2023-03-28 湖南三力智工机械股份有限公司 一种建筑混凝土搅拌机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1459657A (en) * 1922-08-07 1923-06-19 Thomas G Dempsey Mixer
US3081983A (en) * 1959-12-31 1963-03-19 Thibodeaux Clifford Concrete mixer
US3168296A (en) * 1963-03-08 1965-02-02 Stothert & Pitt Ltd Pan type concrete mixers
US3188059A (en) * 1963-02-21 1965-06-08 William A Strong Concrete mixer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1459657A (en) * 1922-08-07 1923-06-19 Thomas G Dempsey Mixer
US3081983A (en) * 1959-12-31 1963-03-19 Thibodeaux Clifford Concrete mixer
US3188059A (en) * 1963-02-21 1965-06-08 William A Strong Concrete mixer
US3168296A (en) * 1963-03-08 1965-02-02 Stothert & Pitt Ltd Pan type concrete mixers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3744768A (en) * 1971-08-30 1973-07-10 Nat Eng Co Mixer system
US4378162A (en) * 1979-02-22 1983-03-29 Bracegirdle P E Process for making asphalt concrete
USRE32206E (en) * 1979-02-22 1986-07-15 Process for making asphalt concrete
US5100239A (en) * 1986-12-19 1992-03-31 Shimizu Construction Co., Ltd. Method of manufacturing concrete

Also Published As

Publication number Publication date
FR1547818A (fr) 1968-11-29
DE1683824A1 (de) 1972-01-05
DE1683824C3 (de) 1978-09-07
DE1683824B2 (de) 1978-01-05
SE319717B (fr) 1970-01-19
GB1167940A (en) 1969-10-22

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