EP0055233B1 - Composition of a surfacing mass - Google Patents

Composition of a surfacing mass Download PDF

Info

Publication number
EP0055233B1
EP0055233B1 EP81850236A EP81850236A EP0055233B1 EP 0055233 B1 EP0055233 B1 EP 0055233B1 EP 81850236 A EP81850236 A EP 81850236A EP 81850236 A EP81850236 A EP 81850236A EP 0055233 B1 EP0055233 B1 EP 0055233B1
Authority
EP
European Patent Office
Prior art keywords
asphalt
stone
fibre
stone material
fibres
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
EP81850236A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0055233A1 (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 AT81850236T priority Critical patent/ATE12128T1/de
Publication of EP0055233A1 publication Critical patent/EP0055233A1/en
Application granted granted Critical
Publication of EP0055233B1 publication Critical patent/EP0055233B1/en
Expired 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
    • 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 composition of a surfacing mass for streets, roads, parking places etc. having a draining activity and comprising a mixture of a stone material and asphalt, according to the preamble of claim 1.
  • the invention also relates to a method of manufacturing such surfacing mass.
  • a reasonably quick run off of water may be obtained when the road is formed cambered but depending on wear, especially when using tire pegs, and depending on the packing and deformation that heavy traffic causes depressed wheel tracks appear in which water may be collected in spite of the fact that the road is cambered.
  • Open grades asphalt friction courses are disadvantageous in some respect. Depending on its porosity open grades asphalt friction courses cannot be provided anywhere, for instance not on cracked substrates. When laying such surface coverings also particular rules must be fulfilled. At places where so called open grades asphalt friction courses have been applied, however, generally positive experiences have been met with.
  • hydrated lime has been used in an amount of for instance 1,5% as calculated on the stone material for eliminating the remaining moisture of the stone material. Since, however, both amines and hydrated lime are classified as dangerous substances particular measurements of safety must be considered when using such substances.
  • the lower mixing temperature for asphalt and stone material also necessitates a time consuming and expensive readjustment of the asphalt mill.
  • the surfacing mass mixed at low temperature shows an unfavourable tendency to post packing or post compressing what especially in summers at heavy traffic load cause relatively strong wheel tracks. Also the post packed part of the surfacing gets a tightening especially of the surface to the effect that the draining property of the surfacing is reduced just on places where such property would be of best need.
  • both of the above mentioned problems may be solved by using mineral fibres of special dimensions according to the characterizing portion of claim 1, viz. the problem of avoiding asphalt run off from the stone material and to avoid the troublesome post-packing problem.
  • This is possible even when mixing the surfacing mass at the normal asphalt mixing temperatures of 150-160°C. It has shown that this is possible if a sufficient large amount of fibre material having sufficiently thin fibres is admixed in the asphalt phase and the mixing is made at the normal asphalt mixing temperature of 150-160°C.
  • the adhesion between asphalt and stone material is not influenced by the admixing of fibres and this means that no particular adhesion improving substances have to be added.
  • the added filler material should have a predetermined small average diameter it is also a need that the fibres should be resistant and should not become softened at the actual mixing temperature. It has shown that particularly good results are obtained by means of mineral fibres having an average fibre diameter which is less than 5 pm and more than 1 ⁇ m.
  • the mineral fibres are made to appear separated from the other in the asphalt phase so as not to form knots or tots.
  • the formation of such knots or tots may be prevented by admixing the fibres in a suitable way and by pretreating the fibres with some substance which simplifies for the asphalt to wet the fibre surface.
  • wetting agents known per se like cationic tensides may be used.
  • the asphalt wetting of the fibre surfaces also may be facilitated in that all moisture is removed from the fibres by drying the fibres before adding the fibres to the asphalt mass.
  • the admixing of the fibre material preferably is made into the asphalt before the stone material is added.
  • a good and tot free admixing may be obtained if the asphalt is heated to a temperature of for instance 20-40°C over the normal temperature for admixing the stone material in connection to the admixing of the fibres, and in that the asphalt-fibre mixture is cooled to the said normal stone material admixing temperature before the stone material is added.
  • the said temporary temperature increase gives a particularly good effect in the case that the wetability between asphalt and fibres is improved in that the fibre surfaces are treated with some wetting agent or in that the fibres are dried. Depending on the risk of fire at the increased temperature the process ought to be accomplished in closed state.
  • the invention relates to a composition of a surfacing mass based on asphalt and a method of manufacturing such a surfacing mass which has draining properties and which comprises a stone material having a low amount of fine material and having asphalt as a binder.
  • the admixing of stone material is made at a temperature for the asphalt of preferably 150-160°C and in the presence of 0,5-20% by weight as calculated on the amount of asphalt of a fibreous material which is not solved or softened in the asphalt.
  • Tests have proved that a sufficient effect for the method to be of technical-economical interest is not obtained if the fibres are present in an amount of less than 0,5%, that is such low amount of fibres cannot justify the admixing costs and the fibre costs. Further tests have shown that higher fibre amounts than 20% do not give improved properties corresponding to the increased costs for the increased amount of fibres.
  • the stone material was heated to 160°C.
  • 160 kg asphalt having the denomination temperature of A-135 according to ASTM standard was added at a temperature of 160°C by means of 40 nozzles.
  • the stone material was mixed with 32 kg mineral fibres of the type manufactured by Rockwool Aktiebolaget and marketed under the registered trade mark Inorphil 057.
  • “Inorphil 057” is a mineral fibre material having an average fibre diameter of about 3 pm and in which the main part of the fibres has a fibre diameter within the area of 1-5 ⁇ m.
  • the so called thickening number (n f ) is measured, which number is
  • the run off and post-packing properties were observed in the same way as in the previous examples.
  • the coarse fibre portion was manufactured by separating away all unfibrated material from coarse fibre basalt wool and a part of the fibres less than 5 ⁇ m.
  • the method according to claim 1 was repeated but with a mineral fibre material the average fibre diameter of which was less than 1 ⁇ m.
  • the run off and post packing properties were observed, and the run off proved to be non-acceptable (E) and the post packing properties were essentially higher than in examples 1-5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Organic Insulating Materials (AREA)
  • Road Signs Or Road Markings (AREA)
  • Road Repair (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
EP81850236A 1980-12-19 1981-12-08 Composition of a surfacing mass Expired EP0055233B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81850236T ATE12128T1 (de) 1980-12-19 1981-12-08 Zusammensetzung einer belagsmasse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8009020 1980-12-19
SE8009020A SE460203B (sv) 1980-12-19 1980-12-19 Belaeggningsmassa med draenerande verkan samt foerfarande foer dess framstaellning

Publications (2)

Publication Number Publication Date
EP0055233A1 EP0055233A1 (en) 1982-06-30
EP0055233B1 true EP0055233B1 (en) 1985-03-13

Family

ID=20342534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81850236A Expired EP0055233B1 (en) 1980-12-19 1981-12-08 Composition of a surfacing mass

Country Status (8)

Country Link
EP (1) EP0055233B1 (no)
JP (1) JPS57140401A (no)
AT (1) ATE12128T1 (no)
DE (1) DE3169301D1 (no)
DK (1) DK152713C (no)
FI (1) FI73714C (no)
NO (1) NO165640C (no)
SE (1) SE460203B (no)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2615520B1 (fr) * 1987-05-20 1989-08-25 Lefebvre Jean Ets Composition bitumineuse pour enrobes coules a froid, procede de realisation d'un tel enrobe et dispositif de dosage de fibres pour la mise en oeuvre du procede
GB2215370A (en) * 1988-03-10 1989-09-20 Fibredec Ltd Method of repairing or surfacing roads and the like

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6815771A (no) * 1968-01-09 1969-07-11
US4175978A (en) * 1977-03-17 1979-11-27 Owens-Corning Fiberglas Corporation Road pavement and repair
DE2826960C2 (de) * 1978-06-20 1983-05-26 Strabag Bau-AG, 5000 Köln Wasserdurchlässige Deckschicht für Verkehrsflächen
FI67072C (fi) * 1979-02-09 1985-01-10 Amiantus Ag Foerfarande foer framstaellning av fiberfoerstaerkt hydrauliskt bindande material

Also Published As

Publication number Publication date
FI73714B (fi) 1987-07-31
NO165640B (no) 1990-12-03
JPH0231164B2 (no) 1990-07-11
FI814082L (fi) 1982-06-20
DE3169301D1 (en) 1985-04-18
DK152713B (da) 1993-09-27
EP0055233A1 (en) 1982-06-30
JPS57140401A (en) 1982-08-31
SE460203B (sv) 1989-09-18
FI73714C (fi) 1987-11-09
NO165640C (no) 1991-03-13
DK152713C (da) 1993-09-27
NO814353L (no) 1982-06-21
ATE12128T1 (de) 1985-03-15
DK561681A (da) 1982-06-20
SE8009020L (sv) 1982-06-20

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