EP0756615B1 - Production de melanges bitumineux - Google Patents

Production de melanges bitumineux Download PDF

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Publication number
EP0756615B1
EP0756615B1 EP95916901A EP95916901A EP0756615B1 EP 0756615 B1 EP0756615 B1 EP 0756615B1 EP 95916901 A EP95916901 A EP 95916901A EP 95916901 A EP95916901 A EP 95916901A EP 0756615 B1 EP0756615 B1 EP 0756615B1
Authority
EP
European Patent Office
Prior art keywords
filler
fraction
fine fraction
liquid
bituminous
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
Application number
EP95916901A
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German (de)
English (en)
Other versions
EP0756615A1 (fr
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
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Individual
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Filing date
Publication date
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Publication of EP0756615A1 publication Critical patent/EP0756615A1/fr
Application granted granted Critical
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C3/00—Working-up pitch, asphalt, bitumen

Definitions

  • the invention relates to a process for production of asphalt mix according to the preamble of enclosed claim 1, as known from EP 0 073 181 A2. Further, the invention relates to an asphalt mix produced therewith.
  • a process for production of asphalt mix that includes at least 1) aggregate divided in a coarse and a fine fraction, 2) filler and 3) flowing bituminous binder wherein the bitumen, the filler and the fine fractions are spread over and by the surface of the flowing coarse fraction in the mixer in one layer opon the other, first binding a layer of bituminous liquid and thereafter, through penetration of the layer of bituminous liquid, binding a layer of filler after which a further layer of the fine fraction material is spread over the layer of filler and thus becomes enclosed through further penetration of the bituminous liquid in a combined suspension where both the filler, the fine fraction and the coarse fraction are part of the closed liquid volume whereby pressure and tensile force on the having are resisted by the hydrostatic function of the continuous bituminous liquid through the skeleton of aggregate particles.
  • the penetration of the bituminous liquid through the filler and the fine fraction develops in one step through spreading, in two layers, the filler and the fine fraction materials over the surface of bituminious liquid, bond to the surface of the flowing coarse fraction in the mixer.
  • the filler is spread in a layer over the layer of bituminous liquid on the surface of the coarse fraction.
  • the fine fraction is spread in a layer over the surface of the coarse fraction, coated by the bituminous liquid that penetrates a layer of filler.
  • the content of fine fraction in mix is determined by the volume of fine fraction materials that can be accommodated in the closed volume of bituminous liquid.
  • the inlets, gates, screws et. are equipped for choice of optimum intervals of time and flow rates for the inflow of the filler and the fine fractions into the mixer to be used for optimizing the distribution of the materials in layers over the flowing coarse fraction at the respective materials discharged into the mixer.
  • the following invention concerning production of asphaltmix is based on the knowledge that a relation exist between two, in principle, different mixing methods, and the change in the influence of the surface area and volume of the aggregate on the physical chemistry of the bituminous liquid in the mixing of asphalt mixes, and that the durability and the climate resistance of the finished products are functions of this existing relation.
  • the major difference in the mixing methods is that the first principle leads to an increased liquid content, in the quantity of particles, in the mixer, while the second principle leads to an increase in the content of particles in the liquid already placed in the mixer.
  • the invention as well as the patent EP A2 0073181 for production of asphalt mix is based on mixing by the second principle.
  • a principle mixing method must be furnished with details in order to be applicable.
  • the invention differs for this reason not in principle from the mixing method in accordance with patent nr EP A2 0073181.
  • the difference is revealed in the details of the principle for application of the invention, determined by the result aimed at. The goal has grown when producing mix with the patented details.
  • the reason for the invention is that at the discharge of the filler in patent nr EP A2 0073181, and other known processes the filler is not spread in a layer over the surface of the bituminous liquid on the flowing coarse fraction, but in the quickest way discharged into the mixer to be distributed and penetrated through forced mixing by agitation of the materials. Further, the fline fraction is added after the filler and the bituminous liquid have developed the suspension, with the result that the fine fraction incalpsulates in the developed suspension of filler. These two details in the patented mixing method have shown to prevent the development of a combined suspension of the filler and the fine fraction.
  • the prerequest for having both filler and fine fraction dispersed in a combined liquid volume is that the liquid penetrates both materials in one step.
  • the materials shall be spread in even layers over the surface of the flowing coarse fraction in the mixer.
  • the inlets are equipped for optimization of interval of time between discharges of the different materials into the mixer and for optimization of rates of flow at spreading, in layers, the filler and the fine fraction over the surface of the coarse fraction in accordance with the invention, to first put a layer of bituminous liquid over the surface of the coarse fraction and then powder the layer of bituminous liquid and, through penetration, bind a layer of filler after which the fine fraction is distributed in a new layer through further penetration of the bituminous liquid, whereby the bituminous liquid through the layers of materials unites the filler, the fine fraction and the coarse fraction in a closed volume of liquid, a condition at which the paved mix resist pressure and strain by the hydrostatic function of the bituminous liquid obtained when the liquid is continuous through the skeleton of the aggregate.
  • Appendix Figure 1b) shows asphalt mix in lack of hydrostatic pressure distribution.
  • the deformation in the specimen of test is governed by the force of gravitation.
  • Figure 1a) shows asphalt mix with hydrostatic pressure distribution and toughness. The continuous resistance against elongation during deformation shows that the bituminous liquid is a closed volume.
  • the invention is a complement to patent nr EP A2, 0073181, that has been developd to secure the properties of the process of mixing obtained when the liquid of mix is a closed volume.
  • bituminous liquid first is distributed on the surface of the coarse fraction, thereafter powdered with filler and then the particles of the fine fraction are distributed over the surface, before the bituminous liquid has broken through the layer of filler, causes that it shall be used not only on bach plants but also on asphalt plants with continuous working mixers and on drum mixers.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Architecture (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Road Paving Structures (AREA)
  • Working-Up Tar And Pitch (AREA)

Claims (4)

  1. Procédé de production d'un mélange asphalteux qui comprend au moins :
    1) un agrégat réparti en une fraction grossière et une fraction fine,
    2) un agent de remplissage, et
    3) un agent liant bitumineux fluide,
    caractérisé en ce que
    le bitume, l'agent de remplissage et la fraction fine, sont étalés à la surface de la fraction grossière dans le flux de la fraction grossière dans le mélangeur, en une couche l'une sur l'autre,
    a) en premier lieu en assurant la liaison d'une couche de liquide bitumineux,
    b) ensuite grâce à la pénétration de la couche de liquide bitumineux, en assurant la liaison d'une couche d'agent de remplissage,
    c) après quoi une couche supplémentaire du matériau de fraction fine est étalée sur la couche d'agent de remplissage,
    dans lequel, au lieu d'un déversement non contrôlé de l'agent de remplissage et de la fraction fine dans le mélangeur, le débit de déversement de l'agent de remplissage est contrôlé de façon à saupoudrer le liquide bitumineux qui est réparti à la surface de la fraction grossière, et l'intervalle de temps entre le déversement des différents matériaux est optimisé de telle sorte et le débit pour déverser la fraction fine dans le mélangeur est contrôlé de telle sorte que le liquide bitumineux pénètre à la fois l'agent de remplissage et la fraction fine en une seule étape, de façon que le liquide bitumineux, l'agent de remplissage et le matériau de la fraction fine deviennent inclus dans une suspension combinée, où l'agent de remplissage, la fraction fine et la fraction grossière font partie d'un volume de liquide fermé, grâce auquel la pression et la force élastique sur un pavage fait à partir du mélange asphalteux, sont rendus résistants par la fonction hydrostatique du liquide bitumineux continu à travers le squelette des particules de l'agrégat.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la fraction fine est étalée sur une couche à la surface de la fraction grossière, enrobée par le liquide bitumineux qui pénètre une couche d'agent de remplissage.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    la teneur en fraction fine dans le mélange est déterminée par le volume de matériaux de fraction fine qui peut être logé dans le volume clos du liquide bitumineux.
  4. Mélange asphalteux produit par le procédé selon l'une quelconque des revendications 1 à 3,
    comprenant au moins
    1) un agrégat réparti en une fraction grossière et une fraction fine,
    2) un agent de remplissage, et
    3) un agent liant bitumineux fluide,
    caractérisé en ce que
    l'agent liant bitumineux, l'agent de remplissage et la fraction fine sont inclus dans une suspension combinée qui est étalée sur la fraction grossière, de sorte que l'agent de remplissage, la fraction fine et la fraction grossière font partie d'un volume clos de liquide, dans lequel la pression et la force élastique sur un pavage fait du mélange d'asphalte sont rendus résistants par la fonction hydrostatique du liquide continu bitumineux à travers le squelette des particules d'agrégat.
EP95916901A 1994-04-19 1995-04-18 Production de melanges bitumineux Expired - Lifetime EP0756615B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9401382 1994-04-19
SE9401382A SE506581C3 (sv) 1994-04-19 1994-04-19 Foer produktion av asfaltmassor
PCT/SE1995/000416 WO1995028457A1 (fr) 1994-04-19 1995-04-18 Production de melanges bitumineux

Publications (2)

Publication Number Publication Date
EP0756615A1 EP0756615A1 (fr) 1997-02-05
EP0756615B1 true EP0756615B1 (fr) 2001-02-28

Family

ID=20393753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95916901A Expired - Lifetime EP0756615B1 (fr) 1994-04-19 1995-04-18 Production de melanges bitumineux

Country Status (6)

Country Link
EP (1) EP0756615B1 (fr)
DE (1) DE69520207T2 (fr)
DK (1) DK0756615T3 (fr)
NO (1) NO311039B1 (fr)
SE (1) SE506581C3 (fr)
WO (1) WO1995028457A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1408157A2 (fr) 2002-10-11 2004-04-14 Karl Gunnar Ohlson Procédé et dispositif pour la production d'une composition d'asphalte
EP1586706A2 (fr) 2004-04-14 2005-10-19 Karl Gunnar Ohlson Procédé et appareil pour la production de mélange d'asphalte

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2476529A3 (fr) * 2010-09-28 2014-04-16 Karl Gunnar Ohlson Invention qui réduit ou élimine la force de mélange dans la production de revêtement d'asphalte et de béton au ciment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000700A1 (fr) * 1981-08-25 1983-03-03 Karl Gunnar Ohlson Procede et dispositif de production de beton asphaltique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1408157A2 (fr) 2002-10-11 2004-04-14 Karl Gunnar Ohlson Procédé et dispositif pour la production d'une composition d'asphalte
EP1586706A2 (fr) 2004-04-14 2005-10-19 Karl Gunnar Ohlson Procédé et appareil pour la production de mélange d'asphalte
EP1586706A3 (fr) * 2004-04-14 2006-11-15 Karl Gunnar Ohlson Procédé et appareil pour la production de mélange d'asphalte

Also Published As

Publication number Publication date
SE506581C3 (sv) 1998-02-05
EP0756615A1 (fr) 1997-02-05
SE9401382L (sv) 1995-10-20
DK0756615T3 (da) 2001-04-30
SE506581C2 (sv) 1998-01-12
WO1995028457A1 (fr) 1995-10-26
DE69520207D1 (de) 2001-04-05
SE9401382D0 (sv) 1994-04-19
DE69520207T2 (de) 2001-06-13
NO964353L (no) 1996-10-21
NO964353D0 (no) 1996-10-14
NO311039B1 (no) 2001-10-01

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