EP0426760B1 - Fluorescent road surfacing material - Google Patents

Fluorescent road surfacing material Download PDF

Info

Publication number
EP0426760B1
EP0426760B1 EP89909635A EP89909635A EP0426760B1 EP 0426760 B1 EP0426760 B1 EP 0426760B1 EP 89909635 A EP89909635 A EP 89909635A EP 89909635 A EP89909635 A EP 89909635A EP 0426760 B1 EP0426760 B1 EP 0426760B1
Authority
EP
European Patent Office
Prior art keywords
road
mineral
fluoresce
surfacing material
surfacing
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
EP89909635A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0426760A1 (en
Inventor
Lars A. Bergkvist
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.)
Ultralux AB
Original Assignee
Ultralux 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 Ultralux AB filed Critical Ultralux AB
Priority to AT89909635T priority Critical patent/ATE87681T1/de
Publication of EP0426760A1 publication Critical patent/EP0426760A1/en
Application granted granted Critical
Publication of EP0426760B1 publication Critical patent/EP0426760B1/en
Anticipated expiration legal-status Critical
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
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
    • 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
    • E01C7/085—Aggregate or filler materials therefor; Coloured reflecting or luminescent additives therefor

Definitions

  • the present invention relates to road-surfacing material, and more particularly to a road-surface layer, so-called road-dressing, applied to asphalted road constructions.
  • An ideal condition is one in which the road surface is light in colour and can be readily illuminated, so as to enable the road to be seen easily and also to enable objects on the road to be readily discerned. It is found, however, that light-coloured road-surfacing materials of the synopal kind do not brighten the road sufficiently when illuminated by conventional vehicle headlamps.
  • the present invention relates to a road-surfacing material which will fulfill the desire for light-coloured road surfaces.
  • the present invention thus relates to road surfacing material which is intended to be laid as a road-surface dressing on asphalted roads and which comprises a crushed rock-material, such as quartzite (SiO2), and a binder, such as pitch, and which is characterised in that it further comprises an additive material which will fluoresce when illuminated with ultraviolet light, said additive material having been produced by bringing a mineral substance to a molten state and doping said mineral substance with a doping agent whose presence will cause the mineral concerned to fluoresce, and which has been crushed and/or granulated to particle size which corresponds to the size of the quartzite particles.
  • a crushed rock-material such as quartzite (SiO2)
  • a binder such as pitch
  • the inventive road-surfacing material comprises a conventional road surface-dressing which has admixed therewith an additive material which will fluoresce when illuminated with ultraviolet light, said additive material being mixed with said road-dressing prior to applying the same.
  • Typical minerals possessing fluorescent properties are fluorspar (CaF2), limespar (CaCO3), Scheelit (CaWO4), Willemit (Zn2(SiO2) and Autunit (Ca(UO2/PO4)2) 10-12 H2O.
  • Limespar can be used to great advantage, since when manganese (Mn) is present, limespar will fluoresce with an orange light. Orange is namely a colour rich in contrast.
  • the fluorescent additive material is not an untreated mineral, but a mineral which has been treated to provide a fluorescent effect.
  • the treatment to which the mineral is subjected in accordance with the invention involves melting a mined or quarried mineral in a furnace of the kind used in the manufacture of mineral wool, i.e. a furnace of the electrosteel type.
  • the molten material is then doped with a doping agent which will cause the mineral to fluoresce, by introducing said doping agent into the molten mineral-bath.
  • the melt may then be granulated or cast. Subsequent hereto, the solidified material is crushed to a particle size which corresponds to the particle size of the quartzite present in the road-surfacing material, i.e. a particle size of about 10-20 mm.
  • the additive material includes one of the minerals limespar or Scheelite doped with manganese or molybdenum respectively.
  • the amount in which the mineral shall be added in order to provide a fluorescent effect will depend on the mineral concerned and also on the strength of fluorescence desired.
  • the additive material is present in the road-surfacing material in an amount which corresponds to 2-25% by weight, preferably about 10-15% by weight.
  • the additive material used by the present invention is not limited to any particular mineral or doping agent.
  • the skilled person is able to acquire this knowledge and is also capable of varying the proportion of the doping agent in the material, and also to vary the proportion in which the invented additive material is present in a road surface, so as to achieve the intended fluorescent effect.
  • the present invention thus provides an additive material which, distinct from natural fluorescent materials, will produce a relatively smooth and uniform fluorescent effect.
  • a fluorescent road-surface will greatly enhance road safety. It is namely found that a fluorescent road-surface will also provide improved road-vision and improved ability to discern objects on the road, even under daylight conditions.
  • the natural light includes a large amount of ultraviolet light, which means that the light conditions of the inventive road-surface will be a considerable improvement on the light conditions afforded by a conventional road-dressing.
  • the invention includes the concept of fitting automotive vehicles with lamps which emit a large proportion of ultraviolet light.
  • lamps which emit white light together with a significant proportion of ultraviolet light can be used in conventional vehicle headlamps.
  • the road surface will appear to glow in the dark, and objects present on the road will stand-out against the road surface, thereby enabling the objects to be discerned easily from a long way off.
  • the resultant road-surface will obtain a wear-resistance which corresponds in all essentials to the wear-resistance of a conventional road surface.
  • the invention thus fulfills the aforesaid objects.
  • the invention is not limited to any particular additive material, and the choice of a suitable mineral for the purposes intended is therefore left to the person skilled in this art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Radiation-Therapy Devices (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP89909635A 1988-08-26 1989-08-25 Fluorescent road surfacing material Expired - Lifetime EP0426760B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89909635T ATE87681T1 (de) 1988-08-26 1989-08-25 Fluoressierendes strassenbelagmaterial.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8802996A SE462109B (sv) 1988-08-26 1988-08-26 Fluorecerande vaegbelaeggning
SE8802996 1988-08-26

Publications (2)

Publication Number Publication Date
EP0426760A1 EP0426760A1 (en) 1991-05-15
EP0426760B1 true EP0426760B1 (en) 1993-03-31

Family

ID=20373135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89909635A Expired - Lifetime EP0426760B1 (en) 1988-08-26 1989-08-25 Fluorescent road surfacing material

Country Status (7)

Country Link
EP (1) EP0426760B1 (sv)
JP (1) JPH03501040A (sv)
DE (1) DE68905813T2 (sv)
DK (1) DK165598C (sv)
FI (1) FI93889C (sv)
SE (1) SE462109B (sv)
WO (1) WO1990002226A1 (sv)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2684398B1 (fr) * 1991-12-03 1993-12-31 Dubois Jean Noel Composition bitumineuse phosphorescente.
US5853615A (en) * 1993-11-15 1998-12-29 Cleanosol International Ab Fluorescent covering for roads, parking areas etc, which fluoresces upon illumination with ultraviolet light
SE502005C2 (sv) * 1993-11-15 1995-07-10 Cleanosol Int Ab Fluorescerande beläggning för vägar, parkeringsplatser etc som fluorescerar vid belysning med ultraviolett ljus
FR2811663B1 (fr) 2000-07-13 2003-05-02 Commenplus Materiau luminescent de ragreage et procede de mise en place d'un tel materiau
US8562864B2 (en) * 2008-06-24 2013-10-22 Shell Oil Company Asphalt mixture

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253146A (en) * 1962-08-16 1966-05-24 Prismo Safety Corp Fluorescent marker pigment for roadways
CH419210A (de) * 1965-03-10 1966-08-31 Alusuisse Verfahren zum Aufhellen der Decke von Bitumen- oder Teerstrassen und -plätzen
GB1401271A (en) * 1971-06-17 1975-07-16 Kroyer K K K Aggregate for road construction and method for the production of said aggregate
US4208300A (en) * 1973-07-11 1980-06-17 Gravisse Philippe E Photoluminescent materials and method of manufacturing same

Also Published As

Publication number Publication date
EP0426760A1 (en) 1991-05-15
DE68905813D1 (de) 1993-05-06
FI902084A0 (sv) 1990-04-25
DK102090A (da) 1990-04-25
DK102090D0 (da) 1990-04-25
SE462109B (sv) 1990-05-07
SE8802996L (sv) 1990-02-27
WO1990002226A1 (en) 1990-03-08
FI93889C (sv) 1995-06-12
DK165598B (da) 1992-12-21
FI93889B (sv) 1995-02-28
DE68905813T2 (de) 1993-10-21
DK165598C (da) 1993-05-03
JPH03501040A (ja) 1991-03-07
SE8802996D0 (sv) 1988-08-26

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