EP0756615A1 - Invention concerning production of asphaltmix - Google Patents

Invention concerning production of asphaltmix

Info

Publication number
EP0756615A1
EP0756615A1 EP95916901A EP95916901A EP0756615A1 EP 0756615 A1 EP0756615 A1 EP 0756615A1 EP 95916901 A EP95916901 A EP 95916901A EP 95916901 A EP95916901 A EP 95916901A EP 0756615 A1 EP0756615 A1 EP 0756615A1
Authority
EP
European Patent Office
Prior art keywords
filler
layer
fraction
liquid
fine fraction
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.)
Granted
Application number
EP95916901A
Other languages
German (de)
French (fr)
Other versions
EP0756615B1 (en
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
Application filed by Individual filed Critical Individual
Publication of EP0756615A1 publication Critical patent/EP0756615A1/en
Application granted granted Critical
Publication of EP0756615B1 publication Critical patent/EP0756615B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 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 i nvention, as wel l as the patent EP A2 0073 181 for producti on of asphal t mix is based on mixing by the second principle.
  • a principl e mixing method must be f urnished with detail s i n order to be applicabl e.
  • the invention differs for this reason not in principle from the mixing method in accordance with patent nr EP A2 00731 81. 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 bi tumi nous 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 fine fraction is added after the fil ler and the bituminous liquid have devel oped the suspensi on, with the result that the fine fraction incalpsulates in the devel oped suspensi on of filler. These two detail s in the patented mixi ng method have shown to prevent the development of a combined suspension of the f iller 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 opti mizati on of interval of time between di scharges of the different materials i nto 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 l ayer through further penetration of the bituminous liquid, whereby the bituminous liquid through the layers of materials unites the fill er, 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.
  • Appendi x Figure 1 b) shows asphalt mix in lack of hydrostatic pressure distributi on.
  • the deformation in the specimen of test is governed by the force of gravitation.
  • Fi gure 1 a) shows asphal t mix with hydrostatic pressure distributi on and toughness.
  • the continuous resi stance against elongati on during deformation shows that the bituminous liquid is a cl osed volume.
  • the invention is a complement to patent nr EP A2, 0073181 , that has been devei opd to secure the properties of the process of mixing obtained when the liquid of mix is a closed volume.
  • bituminous liquid first is distribu ted on the surface of the coarse fraction, thereafter powdered wi th filler and then the particl es of the fine fraction are di stributed 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 al so on asphalt plants with continuous working mixers and on drum mixers.

Landscapes

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

Abstract

The invention consists of a mixing process for the production of asphalt mixes, that include at least aggregate divided in coarse-and a fine fraction, bituminous liquid and filler that replace the miximg process based on forced mixing, through spreading the bituminous liquid, filler and fine fraction over the surface of the flowing coarse fraction, in the mixer, in one layer upon another and that the thickness of filler and fine fraction is limited by the penetration of the bituminous liquid in accordance with the process of the invention that imply the binding to the surface of the coarse fraction, first a layer of bituminous liquid, and thereafter through penetration by the layer of bituminous liquid, bind a layer of filler, and further a layer of fine fraction is spread on the top of the layer of filler, and bond by the penetration of the bituminous liquid in a combined suspension where both the filler and fine fraction are part of the closed volume of bituminous liquid with the consequence of that pressure and tension forces on paving are resisted by the hydrostatic function of the, through the skeleton of aggregate, continuous bituminous liquid.

Description

INVENTION CONCERNING PRODUCTION OF ASPHALTMIX
The following inventi on is based on the knowledge that a relati on 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 bi tuminous liquid in the mixing of asphalt mixes, and that the durabil ity and the cli mate 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 i nvention, as wel l as the patent EP A2 0073 181 for producti on of asphal t mix is based on mixing by the second principle. A principl e mixing method must be f urnished with detail s i n order to be applicabl e. The invention differs for this reason not in principle from the mixing method in accordance with patent nr EP A2 00731 81. 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 bi tumi nous 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 fine fraction is added after the fil ler and the bituminous liquid have devel oped the suspensi on, with the result that the fine fraction incalpsulates in the devel oped suspensi on of filler. These two detail s in the patented mixi ng method have shown to prevent the development of a combined suspension of the f iller 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. In order that the layer of bituminious liquid shall penetrate both filler and fine fraction, in one step the materials shall be spread in even layers over the surface of the flowing coarse fraction in the mixer. To accomplish this, the inlets are equipped for opti mizati on of interval of time between di scharges of the different materials i nto 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 l ayer through further penetration of the bituminous liquid, whereby the bituminous liquid through the layers of materials unites the fill er, 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.
The problem wi th asphalt pavi ngs is their tendency to form tracks and cracks. When fi ller and fine fraction both are parts of the closed li quid volume, pressure and tensil e stress are distributed by the hydrostatic functi on of the liquid. The distribution of pressure by the gl ue phase protects the pavi ng agai nst overload and f orming of tracks at hi gh temperatures, and the toughness of the gluephase protects the paving from forming of cracks at low temperatures.
Appendi x Figure 1 b) shows asphalt mix in lack of hydrostatic pressure distributi on. The deformation in the specimen of test is governed by the force of gravitation. Fi gure 1 a) shows asphal t mix with hydrostatic pressure distributi on and toughness. The continuous resi stance against elongati on during deformation shows that the bituminous liquid is a cl osed volume.
The invention was discovered in use of the patent nr EP A2, 0073181 , when it occured that the choi ce of time intervals has made patent nr EP A2, 0073181 to a borderline case of the invention. Knowledge of optimizing the process has not been available as one has worked in accordance with the hypothesi s that the larger volume of the suspension with filler must be developed before the fine fraction can be accomondated in the li quid and, at the same time, with disregard to the demand that the fill er must be spread over the flowing surface of bituminous liquid at discharge into the mixer, in the inventi on obtained by abandoning the uncontrolled discharge i nto the mixer by the known mixing processes, for a discharge i nto the mi xer by controlled flow rate, in order to obtain an optimi zed distribution of the filler over the l ayer of the bituminous liquid. Through the distribution, the filler lead the penetration of the bituminous liquid through the layer of the fine fracti on material resulting in that both the filler and the fine fraction become part of the same volume of suspension.
The invention is a complement to patent nr EP A2, 0073181 , that has been devei opd to secure the properties of the process of mixing obtained when the liquid of mix is a closed volume.
The process of the invention, where the bituminous liquid first is distribu ted on the surface of the coarse fraction, thereafter powdered wi th filler and then the particl es of the fine fraction are di stributed 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 al so on asphalt plants with continuous working mixers and on drum mixers.

Claims

Claim 1
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 is ch a ra c te ri z ed by that 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 paving are resisted by the hydrostatic function of the continuous bituminous liquid through the skeleton of aggregate particles.
Claim 2
Process in accordance to claim 1 is c h a ra c t e ri z ed by that 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.
Claim 3
Process in accordance to claim 1 is cha racteri zed by that the filler is spread in a layer over the layer of bituminous liquid on the surface of the coarse fraction.
Claim 4
Process in accordance to claim 1 is cha ra cte ri zed by that 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.
Claim 5
Process in accordance to claim 1 is c h a ra c t e r i z ed by that 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.
Claim 6
Device on the asphalt plant for application of the process where the distribution of the filler and the fine fraction is obtained by the flowing coarse fraction, in accordance to claim 1, is c haracte ri z ed by that 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 fl owing coarse fraction at the respective materials discharged into the mixer.
EP95916901A 1994-04-19 1995-04-18 Invention concerning production of asphaltmix Expired - Lifetime EP0756615B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9401382 1994-04-19
SE9401382A SE506581C3 (en) 1994-04-19 1994-04-19 Prior to the production of asphalt pulp
PCT/SE1995/000416 WO1995028457A1 (en) 1994-04-19 1995-04-18 Invention concerning production of asphaltmix

Publications (2)

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

Family

ID=20393753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95916901A Expired - Lifetime EP0756615B1 (en) 1994-04-19 1995-04-18 Invention concerning production of asphaltmix

Country Status (6)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1683715B (en) * 2004-04-14 2013-07-17 卡尔·根纳·奥尔森 Method and device for increasing asphalt road paving material viscosity mixed by intermittent operation device
EP2476529A3 (en) * 2010-09-28 2014-04-16 Karl Gunnar Ohlson Invention that reduce or eliminate force mixing in production of asphalt pavings and cement concrete

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE525421C2 (en) 2002-10-11 2005-02-15 Karl Gunnar Ohlson Process for the preparation of asphalt pulp and apparatus for its implementation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073181B1 (en) * 1981-08-25 1985-08-14 Karl Gunnar Ohlson Method and apparatus for making asphalt concrete

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9528457A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1683715B (en) * 2004-04-14 2013-07-17 卡尔·根纳·奥尔森 Method and device for increasing asphalt road paving material viscosity mixed by intermittent operation device
EP2476529A3 (en) * 2010-09-28 2014-04-16 Karl Gunnar Ohlson Invention that reduce or eliminate force mixing in production of asphalt pavings and cement concrete

Also Published As

Publication number Publication date
SE9401382D0 (en) 1994-04-19
EP0756615B1 (en) 2001-02-28
DE69520207T2 (en) 2001-06-13
DE69520207D1 (en) 2001-04-05
SE506581C3 (en) 1998-02-05
WO1995028457A1 (en) 1995-10-26
NO964353L (en) 1996-10-21
DK0756615T3 (en) 2001-04-30
SE9401382L (en) 1995-10-20
NO311039B1 (en) 2001-10-01
SE506581C2 (en) 1998-01-12
NO964353D0 (en) 1996-10-14

Similar Documents

Publication Publication Date Title
Kandhal et al. Critical Review of VMA requirements in Superpave
CA1147508A (en) Uniform asphalt pavement and production method therefore
CN106661258B (en) Foam Sulphur asphalt for pavement recycling and soil stabilization
Stroup-Gardiner et al. Use of reclaimed asphalt pavement in Superpave hot-mix asphalt applications
US4383864A (en) Adaptive mix proportioning method for use in asphaltic concrete mixing plants
CN101343853A (en) Pavement construction method of high-modulus asphalt concrete
US3257149A (en) Seat pad formation
US4145154A (en) Non-skid highway surfacing
EP0756615A1 (en) Invention concerning production of asphaltmix
US5788756A (en) Paving composition/building composition including a film forming bitumen in-water mixed emulsion
US6380284B1 (en) Method for continuous production of modified bituminous materials
CN106221248A (en) A kind of bituminous paving gap sealing material and preparation method thereof
US2025945A (en) Paving mixture and method of producing same
US1954997A (en) Production of asphalt paving mixtures
US2349445A (en) Method of making bituminous paving compositions and pavements
WO1995028457B1 (en) Invention concerning production of asphaltmix
CN107036867A (en) The gyratory compaction molding method of the Double-layer asphalt compound test specimen of different voidages
US2349446A (en) Manufacture of bituminous pavements and paving compositions
Zaniewski et al. Evaluation of the effect of fines on asphalt concrete
Kanneganti Comparison of 19mm Superpave and Marshall base II mixes in west Virginia
US1991319A (en) Road surfacing composition and method of making same
US2783163A (en) Road making and the like
Shih et al. Evaluation of the effects of crumb rubber and SBR on rutting resistance of asphalt concrete
SU687161A1 (en) Method of regeneration of asphalt-concrete
EP0440562A1 (en) Multilayered roadway anti-cracking covering

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19961021

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE DK FR GB LI NL SE

17Q First examination report despatched

Effective date: 19981028

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE DK FR GB LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20010228

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: PATENTANWALTSBUERO EDER AG

REF Corresponds to:

Ref document number: 69520207

Country of ref document: DE

Date of ref document: 20010405

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20010425

Year of fee payment: 7

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

ET Fr: translation filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20020423

Year of fee payment: 8

Ref country code: FR

Payment date: 20020423

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20020430

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031101

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20031101

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030418

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031231

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20110428

Year of fee payment: 17

Ref country code: DE

Payment date: 20110421

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20110418

Year of fee payment: 17

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120430

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120430

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69520207

Country of ref document: DE

Effective date: 20121101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20121101