EP0034296A1 - Oberflächenbehandlung - Google Patents

Oberflächenbehandlung Download PDF

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Publication number
EP0034296A1
EP0034296A1 EP81100755A EP81100755A EP0034296A1 EP 0034296 A1 EP0034296 A1 EP 0034296A1 EP 81100755 A EP81100755 A EP 81100755A EP 81100755 A EP81100755 A EP 81100755A EP 0034296 A1 EP0034296 A1 EP 0034296A1
Authority
EP
European Patent Office
Prior art keywords
binder
aggregate
particles
abrasive particles
fine abrasive
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.)
Withdrawn
Application number
EP81100755A
Other languages
English (en)
French (fr)
Inventor
Philip James Deane
Arthur Roger Williams
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.)
Dunlop Ltd
Original Assignee
Dunlop Ltd
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 Dunlop Ltd filed Critical Dunlop Ltd
Publication of EP0034296A1 publication Critical patent/EP0034296A1/de
Withdrawn legal-status Critical Current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
    • E01C7/356—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them with exclusively synthetic resin as a binder; Aggregate, fillers or other additives for application on or in the surface of toppings having exclusively synthetic resin as binder
    • 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
    • E01C19/12—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 distributing granular or liquid materials
    • E01C19/21—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 distributing granular or liquid materials for simultaneously but separately applying liquid material and granular or pulverulent material, e.g. bitumen and grit, with or without spreading ; for filling grooves and gritting the filling
    • 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
    • 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
    • E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
    • E01C7/353—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them with exclusively bituminous binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively bituminous binders, e.g. for roughening or clearing
    • 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
    • E01C7/358—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them with a combination of two or more binders according to groups E01C7/351 - E01C7/356

Definitions

  • This invention relates to a method and apparatus suitable for treating a surface, e.g. that of a road, and to the novel treated surface produced thereby.
  • the friction level i.e. skid- resistance of the resulting road surface generally takes the following path: a) initially there is a high level of friction provided by the fine aggregates ("fines") used in the mix. These are worn away by the action of traffic, leaving a thin film of binder covering the aggregate surface b) this binder film masks the microtexture of the aggregate and thus results in a low level of friction. c) once this binder film has worn away, the microtexture of the aggregate is exposed and the friction level rises d) further traffic action polishes the aggregate, i.e. removes the microtexture, thereby causing the friction level to fall until eventually it will reach a stage where its friction level is too low for safety.
  • the first is to apply to the road surface a layer of hot bitumen- coated aggregate particles, usually 14 to 19 mm in size, having first spray-coated the road surface with a tack coat of bitumen.
  • This solution known as surface dressing, restores both microtexture and macrotexture but the resulting surface will follow the path outlined above with its two attendant disadvantageous stages "b" and "d".
  • the adequate retention of the aggregate particles can be a problem; they will often have no mechanical interlock with the underlying surface and will therefore only be held by the binder film.
  • the forces applied to these large aggregate particles by the action of traffic will often be sufficient to dislodge them from the surface, resulting in considerable damage to passing traffic usually in the form of chipped paintwork and broken windscreens.
  • the second solution to the problem is to combine aggregate particles in an epoxy resin binder and apply this to the entire surface. Again, this improves both microtexture and macrotexture.
  • the disadvantage of this system is the high cost involved.
  • the present invention aims to overcome these disadvantages by providing a relatively cheap and simple method of improving the microtextural character of aggregate particles in a binder matrix.
  • the invention is particularly useful both in the early life of a road surface (problem stage "b)" and when the road surface has been exposed to trafficking for a time (problem stage "d)".
  • a composite suitable for use as the surface of a road, runway, pavement, sports surface or the like comprises at least one aggregate in a binder matrix bonded to particles, characterised in that the particles are fine abrasive particles each having a mean diameter of up to 500 microns and said particles are bonded substantially only to those portions of aggregate in the binder matrix which will be directly exposed to wear.
  • a method suitable for treating the surface of a road, runway pavement, sports surface or the like comprising at least one aggregate in a binder matrix is characterised in that fine abrasive particles each having a mean diameter of up to 500 microns are applied to the surface so that said particles will be held substantially only by those portions of the surface which will be directly exposed to wear.
  • an apparatus for treating the surface of at least one aggregate in a binder matrix characterised in that it comprises means for applying a binder to the surface and in tandem therewith means for applying to the resulting binder-coated surface fine abrasive particles each having a mean diameter of up to 500 microns.
  • Aggregate materials suitable for use as the fine abrasive material are those derived from aggregates having a maximum aggregate crushing value as specified in BS 812:1975 of not more than 30.
  • Materials derived other than from aggregates, e.g. metals, must be of an equal performance to this e.g. having a hardness of at least 1 and preferably at least 2 on the Moh scale of hardness.
  • At least 50% by weight of the fine particles each have a mean diameter in the range 50 to 250 microns.
  • suitable materials include crushed naturally occurring gritstones e.g. "Gilfach”, “Craig-yr-Hess” and “Millstone grit", artificial aggregates, e.g. crushed calcined bauxite, slags and emeries.
  • an aggregate/binder matrix is to be coated according to the present invention and uncoated aggregate particles ,tre exposed to the surface it will be necessary to apply a fresh coating of the same or a different binder to the surface to which the fine particles will adhere.
  • Examples of aggregate/binder matrices the surfaces of which may be treated according to the present invention include road, pavements, runways, sports surfaces and the like.
  • the present invention can be used both to restore a worn or old surface and to provide a top-coat for a newly laid surface. This can be done by coating only the uppermost portions with binder as it is only where there is binder that the fine particles will remain.
  • the apparatus of the present invention can be used to achieve this result by designing the means for applying the binder so that it is only applied to'the uppermost aggregate surfaces and/or by ensuring that the binder is sufficiently viscous not to flow over the entire surface and has sufficient tack to hold the fine particles applied thereto.
  • This preferred method of treatment is intended to improve the microtexture, i.e. roughness, of the individual aggregate . particles.
  • the abrasive material can be applied in dry form or in a binder.
  • the proportion of binder must be sufficiently great to hold the abrasive particles to each other but not so great as to mask the microtexture of the abrasive particles. If desired further dry abrasive particles may be dusted onto the resulting surface.
  • At least 160 g/m 2 of dry fine abrasive material is applied to the underlying substrate.
  • the abrasive material is applied as a paste in a binder, e.g. 50/50 by weight, preferably at least 250 g/m2 is applied to give an average film thickness of 0.14 mm.
  • the binder to which the fine material adheres may be selected from e.g. bitumen, tar, epoxy-bitumen, bitumen- polymer blend or an epoxy resin.
  • the machine 1 which may or may not be self-propelled, includes a binder reservoir (not shown) provided with means for heating the binder to its working temperature, means (not shown) for controlling the flow rate of the binder and, in communication with the binder reservoir, a spreader bar 2 provided with an outlet 2b for applying binder to the uppermost surface of the road 3.
  • a spreader bar 2 provided with an outlet 2b for applying binder to the uppermost surface of the road 3.
  • dusting means 4 for applying fine abrasive material to the coated road surface.
  • the dusting means may simply be (as shown) a tapered outlet 4 for the fine material in the reservoir 5.
  • the outlet is usually provided with closure means (not shown) which would come into operation when the machine is not in use and means (not shown) for controlling the flow rate of the material.
  • Suction means 7 may be provided to remove the excess fine material from the road surface and to transfer it back into the reservoir.
  • the machine 1 In use, the machine 1 is moved over the road surface to be treated, binder is applied to the uppermost portion of the surface by means of the spreader bar 2 and immediately following this, fine material is dusted in excess from the tapered outlet 4 onto the binder-coated road surface.
  • the viscosity of the binder is selected so that it is sufficiently viscous not to flow over the entire road surface but has sufficient tack to hold the fine particles.
  • suction is applied through the suction means 7 and the excess material is thereby returned to the reservoir 5.
  • the product of the method and apparatus described with reference to Figure I is a road surface comprising particles 8 coated with binder 9 and provided with a new coating of binder 10 on the uppermost portions, adhered to which are fine particles 11.
  • each sample consists of a single layer of 35 to 50 polished aggregate particles packed as closely as possible and covering an area of 90.6 x 44.5 mm, set in a thin resin mortar so that the aggregate surfaces were exposed.
  • the samples were subjected to a polishing action to simulate that which would occur in a road surface and then the residual frictional resistance was measured using a pendulum skid- tester. Samples tested in this way were then used as described in the Examples and the final "road surface” was tested in the same way to gauge the effect of the abrasive material applied.
  • a paste consisting of about 50% by weight resin/50% by weight calcined bauxite was applied as a relatively thick coating to the uppermost surfaces of various types of aggregate. Dry bauxite particles were then dusted over the coatings. The uncoated aggregates had PSV's in the range 44 to 79 with a mean of 61. Twelve samples were tested in all. Table 2 summarises the mean skid resistances of the coated samples. The standard deviation of the result was only 3.9, thus indicating that the result was independent of the aggregates used in the substrates.
  • Method of coating Thick coating of epoxy resin/bauxite paste followed by dusting with excess bauxite particles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Road Paving Machines (AREA)
EP81100755A 1980-02-15 1981-02-03 Oberflächenbehandlung Withdrawn EP0034296A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8005249 1980-02-15
GB8005249 1980-02-15

Publications (1)

Publication Number Publication Date
EP0034296A1 true EP0034296A1 (de) 1981-08-26

Family

ID=10511407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100755A Withdrawn EP0034296A1 (de) 1980-02-15 1981-02-03 Oberflächenbehandlung

Country Status (5)

Country Link
EP (1) EP0034296A1 (de)
JP (1) JPS56128807A (de)
CA (1) CA1139974A (de)
DK (1) DK64381A (de)
GB (1) GB2071520A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994005861A1 (en) * 1992-09-09 1994-03-17 Roadtex Limited Bitumastic simulated paved surface
FR2769329A1 (fr) * 1997-10-03 1999-04-09 Routiere Beugnet Procede et dispositif de repandage sur une chaussee d'une couche de roulement en beton bitumineux a proprietes photometriques ameliorees
WO1999019566A1 (en) * 1997-10-13 1999-04-22 Italgrip S.R.L. Method and composition for roughening the road surface
CZ305507B6 (cs) * 2014-08-08 2015-11-04 ZnaÄŤky Morava a.s. Způsob protismykové úpravy obrusné vrstvy vozovky

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172170B (de) * 1959-03-16 1964-06-11 Sigrid Heim Geb Krukenberg Kehrgewindewalze fuer Textilmaschinen, insbesondere Kreuzspulmaschinen und Laeufer fuer die Kehrgewindewalze

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1091733B (de) * 1957-04-12 1960-10-27 Ciba Geigy Verwendung einer Kunstharzmasse fuer Boden-, Dach-, Strassen-, Wand- u. ae. Belaege
US3103860A (en) * 1961-08-30 1963-09-17 Horace E Piquette Method of constructing bituminous aggregate surfaces
FR1579181A (de) * 1967-08-22 1969-08-22
DE1943935A1 (de) * 1969-08-29 1971-03-11 Strabag Bau Ag Verfahren zur Verbesserung der Anfangsrauhigkeit von Deckschichten aus hohlraumfreiem bituminoesem Mischgut,insbesondere Gussasphalt,durch Abstreuen mit Splitt
DE2228451A1 (de) * 1971-06-17 1973-01-18 Kroyer K K K Mischgut fuer fahrbahndecken und verfahren zu seiner herstellung
DE2312406A1 (de) * 1972-03-17 1973-10-11 France Etat Rutschfeste belaege, hergestellt unter verwendung von polymeren und deren herstellungsverfahren
GB1384385A (en) * 1971-09-27 1975-02-19 Midland Yorkshire Holdings Ltd Surface dressing for roads
DE2347268A1 (de) * 1973-09-20 1975-04-17 Tarmac Roadstone Holdings Ltd Verfahren zum aufrauhen der oberflaechen von strassendecken
DE7535552U (de) * 1975-11-08 1976-02-26 F. Schacht Kg, 3300 Braunschweig Vorrichtung zum instandsetzen von strassendecken

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1091733B (de) * 1957-04-12 1960-10-27 Ciba Geigy Verwendung einer Kunstharzmasse fuer Boden-, Dach-, Strassen-, Wand- u. ae. Belaege
US3103860A (en) * 1961-08-30 1963-09-17 Horace E Piquette Method of constructing bituminous aggregate surfaces
FR1579181A (de) * 1967-08-22 1969-08-22
DE1943935A1 (de) * 1969-08-29 1971-03-11 Strabag Bau Ag Verfahren zur Verbesserung der Anfangsrauhigkeit von Deckschichten aus hohlraumfreiem bituminoesem Mischgut,insbesondere Gussasphalt,durch Abstreuen mit Splitt
DE2228451A1 (de) * 1971-06-17 1973-01-18 Kroyer K K K Mischgut fuer fahrbahndecken und verfahren zu seiner herstellung
GB1384385A (en) * 1971-09-27 1975-02-19 Midland Yorkshire Holdings Ltd Surface dressing for roads
DE2312406A1 (de) * 1972-03-17 1973-10-11 France Etat Rutschfeste belaege, hergestellt unter verwendung von polymeren und deren herstellungsverfahren
DE2347268A1 (de) * 1973-09-20 1975-04-17 Tarmac Roadstone Holdings Ltd Verfahren zum aufrauhen der oberflaechen von strassendecken
DE7535552U (de) * 1975-11-08 1976-02-26 F. Schacht Kg, 3300 Braunschweig Vorrichtung zum instandsetzen von strassendecken

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994005861A1 (en) * 1992-09-09 1994-03-17 Roadtex Limited Bitumastic simulated paved surface
FR2769329A1 (fr) * 1997-10-03 1999-04-09 Routiere Beugnet Procede et dispositif de repandage sur une chaussee d'une couche de roulement en beton bitumineux a proprietes photometriques ameliorees
BE1013796A4 (fr) * 1997-10-03 2002-09-03 Routiere Beugnet Procede et dispositif de repandage sur une chaussee d'une couche de roulement en beton bitumineux a proprietes photometriques ameliorees.
WO1999019566A1 (en) * 1997-10-13 1999-04-22 Italgrip S.R.L. Method and composition for roughening the road surface
CZ305507B6 (cs) * 2014-08-08 2015-11-04 ZnaÄŤky Morava a.s. Způsob protismykové úpravy obrusné vrstvy vozovky

Also Published As

Publication number Publication date
GB2071520A (en) 1981-09-23
JPS56128807A (en) 1981-10-08
CA1139974A (en) 1983-01-25
DK64381A (da) 1981-08-16

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

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AK Designated contracting states

Designated state(s): BE DE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19811007

ITF It: translation for a ep patent filed

Owner name: RIT.TO ALL'OEB ALLO STATO DI DOMANDA;GUZZI E RAVIZ

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

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Withdrawal date: 19840213

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WILLIAMS, ARTHUR ROGER

Inventor name: DEANE, PHILIP JAMES