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
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/22—Luminous paints
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
  • C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
• • 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
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
  • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
  • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
  • E01F9/506—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces

Definitions

• the present invention relates to a method for making a road surface of luminiscent type, primarily a surface being fluorescent by irradiation with ultravio ⁇ let light.
• SE-B 462,109 there has previously been experimented with the principle of making the road itself luminiscent by the use of vehicle lights or auxiliary lights with a high content of UV- light, as a significant improvement of the road sight is hereby achieved.
• the previous attempts have hardly ever left the laboratory phase, as it is crucial for the applicability of the concept that the desired character of the surface is achievable in an efficient and yet non-expensive way.
• the hitherto suggested solu ⁇ tions are either too weak or too expensive for practical applicability, and it is the purpose of the invention to suggest a technique which is suitable for use in prac ⁇ tice in an economic and efficient way.
• the granulate in question which can also contain for instance sand, will be coated by the binder in the road material, but after a slight wearing-off of the road surface, the granulate in the surface layer will be ex ⁇ posed and thus present the luminiscent effect.
• an aqueous solution of a lumini ⁇ scent agent will be applicable as a thin surface layer when it is compounded into an aqueous cement grout, which is applied as paint, preferably with a further content of sand or other wear resistant material.
• the paint will after setting make excellent adhesion to the base course, inter alia by being absorbed by depressions into the road surface.
• the invention is based on the consi ⁇ deration that generally - no matter whether the applied active agent is liquid or solid - it will be advantage ⁇ ous to incorporate the agent in an independent structu ⁇ ral matrix, inter alia because in the same matrix there may be other agents specially suited as concomitant agents, for instance a white dyestuff that may promote the reflection from an fluorescent agent without the said concomitant agent having to be present all over the road material.
• the effect of the active agent can be optimized in exactly the subareas where it occurs, just as the same subareas or macroparticles, for instance by said application of sand, may be adapted to appear as mechanically acceptable parts of a road layer.
• the remaining part of the road material which will normally constitute the major part of all the material, can then be prepared completely without considerations as to the desired special effects of the road surface.
• Cer ⁇ tain ones of the very inexpensive active substances may show disadvantages as to sta ⁇ bility or environmental effects, viz. by a noticeable content of heavy metals, but partly there may very well be found other and more acceptable active substances, and partly there may in some incidents be compensated for the disadvantageous capabilities by admixing compen ⁇ sating agents into the limited matrix, in which the active substance occurs.
• the special structural matrix carrying the luminiscent agent need not necessarily be based on a hydraulic material, as for instance also a plastic matrix of polyester, polyurethane, acryl plas ⁇ tics or another corresponding material with an admixed hardener and optionally an accociated hardening accele ⁇ rating agent.
• the same matrix may consist of a more or less transparent material in order to en ⁇ hance the effects of the active stuff.
• paraffin or transparent plastics may be used.
• suitable heat resistant dyestuffs even glass may be used, and generally ceramic matrixes such as for in ⁇ stance tile will be applicable.
• UV-lamps should be adapted for defiltration of UV-rays in the short-waved area of the spectrum, as these rays are dangerous, and therefore active agents must be elected, which are active in the remaining, long-waved area of the UV-spectru .
• the road materi ⁇ al itself may in principle be considered as a potential matrix for the luminiscent agent, almost no matter the kind or condition of this agent, when only the agent is resistant in the alkaline environments, but for good reasons it is preferred that the agent is only mixed into the top layer. This, however, will still be most suitable also for mixing into concrete or for instance by depression into the concrete surface.
• the matrix granulate may be produced by a direct moulding into pellet or macro particle shape, but also by crushing of a manufactured voluminous solid material. After or in connection with the crushing a sieving may take place, whereby the actual granulate is isolated from the more fine-grained material, and the latter fraction may, optionally, be used for scattering on a not yet set road surface.
• Example 1 serves to illustrate the embodiment con ⁇ sisting of a fluorescent, cement based granulate being mixed into an ordinary stone material, whereby the road material or the like thus produced becomes fluorescent.
• the applied powdered dyestuff is produced commer ⁇ cially by Swada Ltd., London.
• the dry components are mixed separately whereafter the water is added.
• the components are thereafter thoroughly mixed and grouted in slabs or the like, which, after setting, are crushed and sieved.
• the 8-12-fraction of a material produced by this recipe has been used for the making of a test road in full scale, whereby a surface treatment on an already existing road surface was effected, based on conventio ⁇ nal road building technique.
• the fluorescent granulate hereby constituted 40% of the total stone material, which consisted of bright granite.
• the layer showed a surprisingly powerful luminous effect, proved by test driving with a vehicle equipped with UV-lamps.
• Example 2 is a recipe of a plastic based granulate, which can be applied in the same way as the cement based granulate according to example 1.
• Example 2 is a recipe of a plastic based granulate, which can be applied in the same way as the cement based granulate according to example 1.
• Sand and dyestuff are mixed dry, whereafter these constituents are mixed into the polyester.
• the MEKP-solution is added, and the mass is moulded out.
• a mixture according to this recipe will harden by ambient air temperature, but the hardening may be expedited and the strength of the finished material be improved by a weak heating, for instance to 45°C. After hardening the material is crushed and sieved.
• Reaction compounds according to the recipes in examples 1 and 2 will also be qualified for grouting in minor parts, these being used in a corresponding way as a given fraction of crushed material. Thus energy con ⁇ sumption and waste at the crushing is saved.
• Example 3 illustrates the possible compound of a cement based paint for treatment of an existing road surface, whereby this is made fluorescent.
• the dry compounds are mixed thoroughly, whereafter water is added. Thereby a thin paste is produced, applicable as a paint.
• the noticeable content of sand makes the paint wear resistant, just as it will counter ⁇ act moulding shrinkage and crack formations in the paint layer.
• the degree of addition of dyestuff or matrix granulate in the road material may be adapted according to the desired effect, balanced with other relevant circumstances. It is even a theoretical possibility that a road can be made based solely on the matrix granulate with the use of a suit ⁇ able binder.
• Vehicles moving in one traffic lane of a two-way carriageway may be provided with a UV-light equipment which will also activate the opposite lane for general lightening thereof.
• a driver driving in the oppo ⁇ site direction when meeting a more or less blinding counterlight, may orient him- or herself better of the driving conditions further ahead.
• This effect may be further improved by the use of a phosphescent light sub ⁇ stance, or by the use of stationary means for an irradi ⁇ ation or any other actuation of the light substance.
• a phosphorescence would be active during the dark hours, solely by the influence of the daylight irradiation.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Road Paving Structures (AREA)
• Road Signs Or Road Markings (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8101541

Family Applications (1)

Country Status (6)

Cited By (3)

Citations (3)

• 1993
  • 1993-10-13 DK DK931147A patent/DK114793D0/da not_active Application Discontinuation
• 1994
  • 1994-10-13 WO PCT/DK1994/000384 patent/WO1995010663A1/en active Application Filing
  • 1994-10-13 AU AU78080/94A patent/AU7808094A/en not_active Abandoned
• 1996
  • 1996-04-11 NO NO961431A patent/NO961431L/no unknown
  • 1996-04-12 FI FI961609A patent/FI961609A/sv unknown
  • 1996-04-12 SE SE9601417A patent/SE9601417L/sv not_active Application Discontinuation

Patent Citations (3)

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