EP0058290B1 - Composition of a road surfacing mass - Google Patents

Composition of a road surfacing mass Download PDF

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Publication number
EP0058290B1
EP0058290B1 EP81850237A EP81850237A EP0058290B1 EP 0058290 B1 EP0058290 B1 EP 0058290B1 EP 81850237 A EP81850237 A EP 81850237A EP 81850237 A EP81850237 A EP 81850237A EP 0058290 B1 EP0058290 B1 EP 0058290B1
Authority
EP
European Patent Office
Prior art keywords
asphalt
fibre
mass
stone material
temperature
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
Application number
EP81850237A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0058290A1 (en
Inventor
Ingmar Andersson
Nils-Olov Nilsson
Elis Karlsson
Ulrik Sandberg
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.)
Cessione laxa Bruk AB
Original Assignee
Skanska Cementgjuteriet AB
Rockwool AB
Skanska AB
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 Skanska Cementgjuteriet AB, Rockwool AB, Skanska AB filed Critical Skanska Cementgjuteriet AB
Priority to AT81850237T priority Critical patent/ATE8283T1/de
Publication of EP0058290A1 publication Critical patent/EP0058290A1/en
Application granted granted Critical
Publication of EP0058290B1 publication Critical patent/EP0058290B1/en
Expired 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
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
    • E01C7/262—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with fibrous material, e.g. asbestos; with animal or vegetal admixtures, e.g. leather, cork
    • 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
    • E01C11/00—Details of pavings
    • E01C11/16—Reinforcements
    • E01C11/165—Reinforcements particularly for bituminous or rubber- or plastic-bound pavings
    • 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
    • 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
    • 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
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/182—Aggregate or filler materials, except those according to E01C7/26

Definitions

  • the present invention relates to a method of manufacturing and the use of a compression resistant and highly stable surfacing mass for heavy loaded surfaces, especially for high traffic and heavy loaded parts of streets and roads, the surfacing mass mainly comprising a stone material which is bound by an asphalt mass, as defined in the first part of claim 1.
  • a lack of stability in the surfacing mass comes to the effect that the mass is deformed especially due to the fact that the vehicle wheels depending on where unpacking of the surfacing mass provides lowered wheel tracks in the road way which necessitate an expensive maintenance. On the said exposed places the maintenance work further is difficult to carry out and causes traffic disturbances to a higher degree than normal road maintenance.
  • the demands on the properties of the binder increases correspondingly, and in practice the character of the binder has become the most important factor for the stability of the surfacing mass.
  • the binding capacity may be increased by adding an increasing amount of binder in relation to the amount of stone material.
  • asphalt run-off what means that the hot asphalt during the mixing of asphalt with the stone material runs off the stone particles, what both counteracts the intension of increasing the amount of binder, and also causes problems at storing and transport.
  • the stability of the surfacing masses is not substantially increased, possibly depending on the so called cold flow of the asphalt.
  • a mineral fibre material having a small fibre diameter preferably a fibre material having an average diameter which is less than 5 pm and in which the particles are even distributed in the asphalt mainly as separate fibres strongly reduces or eliminates the above mentioned cold flow problem of the binder or the asphalt.
  • a binder phase is obtained giving the ready surfacing mass substantially increased stability as compared with previously known surfacing masses without giving a too high viscosity at mixing temperatures for a quick and careful mixing.
  • the increased stability depends on an increased strength of the binder which probably depends both on the increased thickness of the binder film around the stone grains and also that the added fibre material, which is evenly distributed as separate fibres in the asphalt, as a reinforcing action.
  • fibres may be used many different types of material provided that the fibres do not melt in the asphalt which during the mixing with the stone material is kept at a temperature of 140-170°C or preferably 150-160°C and also supposing that the fibres are sufficiently stiff and maintain at least a substantial stiffness in the hot asphalt. It has shown that a particularly suitable material is mineral fibres, for instance stone fibres, viz. fibres manufactured by melting stone like diabas and a subsequent fibrating of the melted stone.
  • the average fibre diameter should be less than 5 ,um.
  • the average fibre diameter is less than 1 ,um the favourable effect of the fibres is obviously reduced, probably in that the thin fibres irrevocably are shortened substantially during the mixing operation.
  • the average fibre diameter consequently should be between 1 pm and 5 ,um.
  • the fibres should be added in an amount by weight of 0.5 and 20% as calculated on the weight of asphalt, what corresponds to about 0.03-1.2% by weight of the ready surfacing mass.
  • the fibres are not present in the form of tots or other baked together aggregates. This can be avoided by a correct admixing techniques.
  • all kinds of non-polar compounds can be used, or instance wetting agents like catjonic tensides in the form of tertiary or quartery ammonium compounds.
  • the fibres are as dry as possible when being admixed in the asphalt, and for obaining an effect similar to the above mentioned treatment with a wetting agent it may be advantageous to dry the fibres before mixing the fibres into the asphalt or surfacing masses so the main part of the water molecules normally absorbed to the surfaces of the fibres are removed.
  • the admixing of the fibres may be made by adding the fibres to the stone material before the asphalt is admixed therein or the fibres may be admixed into the ready asphalt-stone mass.
  • An especially good effect, however, is obtained if the fibres are mixed with the asphalt mass before adding said mass to the stone material. This facilitates the mixing and the equilizing of the fibres, and the mixing of the fibre material and the asphalt material can be made indulgently to the fibres so that the fibres are not broken.
  • Uneven and tot free distribution of the fibres in the asphalt is further favourized if the asphalt in connection to the admixing of the asphalt is heated, for instance to 20-40 0 C over the temperature of about 150-160°C which the asphalt material and the stone material are mixed, whereupon the asphalt-fibre mixture is cooled to said temperature and is admixed in the stone material.
  • the temperature increase reduces the viscosity of the asphalt and thereby facilitates a homogenous and indulgent admixing of the fibre material, and further the wetting of the fibre surfaces is facilitated at the said increased temperature, and the dispersing of the fibres in the asphalt is made quickly and effectively.
  • n f the so called thickening number (n f ) is defined, which is calculated by the formula in which n is the viscosity of a slurry of 1.5 g dry fibre in 200 ml ethyleneglycol at 20°C and in which ⁇ o is the viscosity of the same ethyleneglycol without fibres likewise at 20°C and measured with the same equipment, viz. a Brook- field viscosimeter having a spindle LV1 or corresponding.
  • the thickening number is 1.0-5.0.
  • the height position for eight different points along the center line of the frame is measured in relation to the frame.
  • the mutual distance between the points is 200 mm.
  • the measuring points are provided by a circular disc having a diameter of 20 mm which is put on the measuring point.
  • a cylindric roll having a length of 100 mm and a diameter of 350 mm and loaded by 2000 N (200 kg) is rolled five times in both directions over the mass along the center line.
  • the height of the above mentioned measuring points are once again noted and the difference to the original height is utilized as a measurement on the post-packing of the mass.
  • the values are compared with corresponding values of post-packing of a normal mass, whereby the following value bases are used:
  • Example 1 the mass had an obvious post- packing tendency.
  • Example 1 was repeated with the same type of mineral fibre but of different length for the admixed fibre.
  • the amount of admixed fibres and the results are made account for in the following table.
  • Example 2 a comparative mineral fibre having an average diameter of 6-8 gm, but for the rest the method according to Example 1 above was repeated.
  • an apparatus for manufacture of a surfacing mass In a tank 1 having heating coils 2 an asphalt mass 3 is heated to normal mixing temperature or, as mentioned above, to a temperature which is 20-40°C above said mixing temperature.
  • a pump 4 By means of a pump 4 the hot asphalt is batchwise pumped over to a mixing container 5 which is formed with a stirring device 6, and to which mineral fibres are batchwise added from a container 7.
  • the asphalt fibre mass After stirring to provide a homogenous mixture the asphalt fibre mass is pumped through a heat exchanger 9 by means of a pump 8, in which heat exchanger the temperature of the asphalt fibre mixture is adjusted to correct temperature for being mixed with the stone mass.
  • the mass is cooled, and if the mixture is made at the normal admixing temperature at for instance 150-160C and some cooling may have occurred during the handling of the mass some adjustment for increasing the temperature may be necessary.
  • the stone material is heated in a container 10 having heating means 11 and from there the stone material is batchwise transferred to a rotating mixer drum 12.
  • the mass coming from the mixing container 5 for asphalt and mineral fibre is likewise pumped batchwise through the heat exchanger 9 to the mixer drum 12 and is mixed with a stone material with the same temperature for the two phases.
  • the mineral fibre material can be supplied directly from the mineral fibre container 7 to the mixer drum 12 for asphalt and stone material, and in this case, of course, the asphalt is also pumped directly from the asphalt tank 1 to the mixture drum 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Glass Compositions (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP81850237A 1980-12-19 1981-12-08 Composition of a road surfacing mass Expired EP0058290B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81850237T ATE8283T1 (de) 1980-12-19 1981-12-08 Zusammensetzung einer strassenbelagmasse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8009021A SE441938B (sv) 1980-12-19 1980-12-19 Forfarande for framstellning av en tryckhallfast och hogstabil beleggningsmassa for starkt belastade ytor
SE8009021 1980-12-19

Publications (2)

Publication Number Publication Date
EP0058290A1 EP0058290A1 (en) 1982-08-25
EP0058290B1 true EP0058290B1 (en) 1984-07-04

Family

ID=20342535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81850237A Expired EP0058290B1 (en) 1980-12-19 1981-12-08 Composition of a road surfacing mass

Country Status (8)

Country Link
EP (1) EP0058290B1 (no)
JP (1) JPS57127003A (no)
AT (1) ATE8283T1 (no)
DE (1) DE3164615D1 (no)
DK (1) DK152850B (no)
FI (1) FI72993C (no)
NO (1) NO165641C (no)
SE (1) SE441938B (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007027306A1 (de) * 2007-06-10 2008-12-18 Evonik Goldschmidt Gmbh Verwendung eines Haftvermittlers für Fasern, insbesondere zu deren Einbringung in Bitumen aufweisende Massen

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076560A (ja) * 1983-10-03 1985-05-01 Ube Ind Ltd アスフアルト混合物
GB2187272A (en) * 1986-01-08 1987-09-03 John Harry Clarke Heat exchange apparatus
GB2215370A (en) * 1988-03-10 1989-09-20 Fibredec Ltd Method of repairing or surfacing roads and the like
DE3930599A1 (de) * 1989-09-13 1991-04-04 Strabag Bau Ag Gussasphalt und verfahren zu seiner herstellung
FR2682308B1 (fr) * 1991-10-14 1995-04-21 Screg Routes Travaux Publics Procede et poste d'enrobage d'agregats avec du bitume et des fibres, notamment des fibres de verre, et dispositif d'incorporation d'un produit particulaire dans du bitume.
FR2721952B1 (fr) * 1994-07-01 1996-08-02 Soc D Pavage Et Des Asphaltes Asphalte coule arme
FR2724952B1 (fr) * 1994-09-27 1996-12-20 Orgel Procede de renforcement de sols, de couches de terrain ou de chaussees par des fils de verre
FR2770235A1 (fr) * 1997-10-23 1999-04-30 Et L Entretien Des Routes Sa P Structure stabilisee, notamment de type ballast, et procede de stabilisation d'une telle structure
JP6531022B2 (ja) * 2015-10-06 2019-06-12 大成ロテック株式会社 常温施工型アスファルト合材の製造方法および常温施工型アスファルト合材

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6815771A (no) * 1968-01-09 1969-07-11
US3822340A (en) * 1972-03-27 1974-07-02 Franklin Key Calcium sulfate whisker fibers and the method for the manufacture thereof
JPS51139819A (en) * 1975-05-29 1976-12-02 Mitsui Toatsu Chemicals Composite of paving asphalt
US4175978A (en) * 1977-03-17 1979-11-27 Owens-Corning Fiberglas Corporation Road pavement and repair
CH638005A5 (de) * 1978-12-06 1983-08-31 Kibag Ag Verfahren zum herstellen eines schwarzbelages und danach hergestellter schwarzbelag.
FI67072C (fi) * 1979-02-09 1985-01-10 Amiantus Ag Foerfarande foer framstaellning av fiberfoerstaerkt hydrauliskt bindande material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007027306A1 (de) * 2007-06-10 2008-12-18 Evonik Goldschmidt Gmbh Verwendung eines Haftvermittlers für Fasern, insbesondere zu deren Einbringung in Bitumen aufweisende Massen

Also Published As

Publication number Publication date
NO165641C (no) 1991-03-13
FI72993C (fi) 1987-08-10
FI72993B (fi) 1987-04-30
JPH0235802B2 (no) 1990-08-14
NO165641B (no) 1990-12-03
DK561781A (da) 1982-06-20
JPS57127003A (en) 1982-08-07
EP0058290A1 (en) 1982-08-25
DK152850B (da) 1988-05-24
SE8009021L (sv) 1982-06-20
FI814083L (fi) 1982-06-20
NO814354L (no) 1982-06-21
ATE8283T1 (de) 1984-07-15
DE3164615D1 (en) 1984-08-09
SE441938B (sv) 1985-11-18

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