EP2476529A2 - Erfindung zur Verringerung oder Beseitigung der Kraftmischung bei der Herstellung von Asphaltdecken und Zementbeton - Google Patents

Erfindung zur Verringerung oder Beseitigung der Kraftmischung bei der Herstellung von Asphaltdecken und Zementbeton Download PDF

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Publication number
EP2476529A2
EP2476529A2 EP11007798A EP11007798A EP2476529A2 EP 2476529 A2 EP2476529 A2 EP 2476529A2 EP 11007798 A EP11007798 A EP 11007798A EP 11007798 A EP11007798 A EP 11007798A EP 2476529 A2 EP2476529 A2 EP 2476529A2
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EP
European Patent Office
Prior art keywords
particles
mixer
liquid
dust
mix
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.)
Withdrawn
Application number
EP11007798A
Other languages
English (en)
French (fr)
Other versions
EP2476529A3 (de
Inventor
Karl Gunnar Ohlson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from SE1000959A external-priority patent/SE1000959A1/sv
Application filed by Individual filed Critical Individual
Publication of EP2476529A2 publication Critical patent/EP2476529A2/de
Publication of EP2476529A3 publication Critical patent/EP2476529A3/de
Withdrawn legal-status Critical Current

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    • 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
    • B28C5/003—Methods for mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
    • B01F27/702—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with intermeshing paddles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/82—Pan-type mixers, i.e. mixers in which the stirring elements move along the bottom of a pan-shaped receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F29/00—Mixers with rotating receptacles
    • B01F29/60—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/715—Feeding the components in several steps, e.g. successive steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7173—Feed mechanisms characterised by the means for feeding the components to the mixer using gravity, e.g. from a hopper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71775—Feed mechanisms characterised by the means for feeding the components to the mixer using helical screws
    • 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
    • B28C7/0404—Proportioning
    • 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
    • B28C7/0454—Volumetric measuring devices, e.g. for consecutively delivering predetermined volumes of ingredients
    • B28C7/0477—Volumetric measuring devices, e.g. for consecutively delivering predetermined volumes of ingredients by using conveyor screws
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/1027—Mixing in a rotary receptacle
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
    • E01C19/1068—Supplying or proportioning the ingredients
    • E01C19/1072—Supplying or proportioning the ingredients the solid ingredients

Definitions

  • the interaction between dispersed dust particles and a liquid produces a volume of binder of mix with the properties of a suspension.
  • the interaction of dispersed particles in a suspension induce to the liquid a number of properties i.e. expanding the liquid volume equally to the volume of dispersed particle, increasing the viscosity of the liquid through close packing in the liquid, and the facts that the glue phase of suspension is a continuous phase enclosed by the structure of coarse particles, the suspenion is hydrostatic solid in the resistance to preassure and ductile/cohesive i.e tough at strain.
  • the aggregate material used in industrial production of asphalt pavings and cement concrete is selected for the resistance to wear.
  • Particle technology begin shortly after the second World War. Particle products were attractive because of the high surface to volume ratio avilable for interaction with the liquid. In 1945 it was predicted that the science and technology of fine particles would be of major importance in the development of future products.
  • the quantity of different fractions of solids are determined by weight whereas for the mixng with the liquids in accordance with the invention, the fractions of solids are recognized by number of particles/unit weigth. In that respect the dust material advances from being the smalest by weigth in mix to the largest in number of particles in the mixing process.
  • the properties of the glue phase of suspension The Asphalt pavings and hardened cement concrete is produced by selected amounts of coarse fraction, the main part being > than 4 mm, fine aggregates, the main part being ⁇ than 4 mm and filler and cement particles ⁇ than 0.074 mm. Filler and cement are hereafter defined as "dust particles”.
  • the liquid of the asphalt mix production is the bituminous liquid wheras the liquid of cement concrete production is the water. Both hereafter with reference to the mixing process defined as "liquids”.
  • the glue phases of the products are sufficient to form a continuous phase through the skeleton of the coarse aggregate particles of the mix.
  • the continuity and inclosure of the glue phases by the surfaces of the coarse fraction particles makes the glue phases of the products ductile/cohesive.
  • the enclosed glue phases makes the products hydrostatic solid.
  • enclosed liquids are hydrostatic solid.
  • the products deform to break by a flow. (Reference to rheology). Without the properties of interaction the products deforms by cracking before breaking. (Reference to mechanical properties).
  • the products meets the requirements of the Particle engineering, Interfacial Engineering and Charaterization set out in Points 5-8 and 11 above.
  • the coarse fraction particles are first mixed with the liquids for example 8 sec. this to develop a surface area of liquid equal to the surface area of all coarse fraction particles, the dimensions of the area are a) the breadth given by the length of the shafts in the mixer b) the length of the area determined by the flow of surface area of liquid on the coarse fraction particles at a set period of time as an example 1 5 sec, and c) a device for discharging the dust particles in sufficient state of dispersion along the breadth of the area and d) discharge the fine fraction particles in the same area, mix as an example 10 sec and discharge the ready mix from the mixer.
  • the material flow in the mixer is shown by figure 1 .
  • the fine fraction of the mix is discharged by mass if directed to the donward flow in the mixer of the liquid suspension on surface of the coarse fraction paticles.
  • the asphalt mixing temperature is in range of 125°-140°C.
  • Figure 1 refers. From earlier patent and applications are empered that the coarse fraction of the asphalt mix and cement concrete production, is coated in advance with the liquid before admixing the dust material. EP 1 586 706 A2 and EP 95 916 902.0-2303 respectively. In both applications the example of means given for discharge of the dust materials on to the surface of the flowing coarse fraction, is a conveyor belt or a screw. The discharge is made at a controlled rate of flow. This disclose that the dust material is discharged in a narrow string of mass of particles on the breadth of the area declared open by the invention for recieving dispersed dust particles.
  • the coarse fraction particles are first mixed with the liquids for example 20 sec. This to develop the surface area of liquid equal to the surface area of all coarse fraction aggregate particles of the mix, the surface area exposed by the rotaion of the cylindrical drum of the Free Falls mixer.
  • the dust material is discharged in to the mixer over time period of, as an example, 25sec.
  • the dust material is first lifted up by shelfs or a screw the blades of the screw fitted to the internal circulair wall of the drum. This makes free dust material fall down over the endless upward flow of the watered coarse fraction and the area in the mixer open to recieve dispersed dust particles for interaction with the liquid is a) provided by the rotation of the drum and b) the length of time of discharge of the dust material to the mixer.
  • the fine fraction material is discharged as a mass to the mixer and dispered by a continuous free fall in the mixer during the mixing time of, for example, 30sec. Then mix is discharged from the mixer.
  • the function of the paddle system of the pan mixer breaks the flow of the course fraction when mixed with the liquid i.e there is no continuous flow of the course fraction in the mixer.
  • the cement is dispersed before interacting with the liquid by a slow rate of discharge to the mixer over the time of example 30s and then mixing for 20s before the fine fraction is added and mixed 1 5 sec before mix is discharged from the mixer.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
EP11007798.9A 2010-09-28 2011-09-26 Erfindung zur Verringerung oder Beseitigung der Kraftmischung bei der Herstellung von Asphaltdecken und Zementbeton Withdrawn EP2476529A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1000959A SE1000959A1 (sv) 2010-03-15 2010-09-28 Uppfinning som minskar eller eliminerar tvångsblandning vid produktion av asfaltbeläggningar och cementbetong

Publications (2)

Publication Number Publication Date
EP2476529A2 true EP2476529A2 (de) 2012-07-18
EP2476529A3 EP2476529A3 (de) 2014-04-16

Family

ID=44674098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11007798.9A Withdrawn EP2476529A3 (de) 2010-09-28 2011-09-26 Erfindung zur Verringerung oder Beseitigung der Kraftmischung bei der Herstellung von Asphaltdecken und Zementbeton

Country Status (1)

Country Link
EP (1) EP2476529A3 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1586706A2 (de) 2004-04-14 2005-10-19 Karl Gunnar Ohlson Verfahren und Vorrichtung zur Herstellung einer Asphaltmischung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB354981A (en) * 1929-09-21 1931-08-20 Albrecht Reiser Improvements relating to asphalt boilers
FR856517A (fr) * 1939-03-03 1940-06-17 J J Neveux Sa Doseur distributeur de matières de charge pour matériaux enrobés à usages routiers
AU464167B2 (en) * 1972-05-25 1975-08-21 Gunnar Ohlson Karl A method for the production of plant-mixed asphalt concrete
DK71478A (da) * 1978-02-17 1979-08-18 S Brams Apparat til blanding og uddeling af faststoffer
JPS56109713A (en) * 1980-02-02 1981-08-31 Nippon Rotsukuraapipe Kk Hammering and installing device for manufacturing reinforced fiber dispersing discharger and fiber reinforcing hardening substance structure provided with said dispersing discharger
SE506581C3 (sv) * 1994-04-19 1998-02-05 Karl Gunnar Ohlson Foer produktion av asfaltmassor
SE502752C2 (sv) * 1994-04-19 1995-12-18 Gunnar Ohlson Förfarande för framställning av seg cementbetong
SE525421C2 (sv) * 2002-10-11 2005-02-15 Karl Gunnar Ohlson Förfarande för framställning av asfaltmassor samt anordning för dess genomförande

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1586706A2 (de) 2004-04-14 2005-10-19 Karl Gunnar Ohlson Verfahren und Vorrichtung zur Herstellung einer Asphaltmischung

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EP2476529A3 (de) 2014-04-16

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