GB2421973A - Compaction of edges of a layer of material - Google Patents

Compaction of edges of a layer of material Download PDF

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Publication number
GB2421973A
GB2421973A GB0426801A GB0426801A GB2421973A GB 2421973 A GB2421973 A GB 2421973A GB 0426801 A GB0426801 A GB 0426801A GB 0426801 A GB0426801 A GB 0426801A GB 2421973 A GB2421973 A GB 2421973A
Authority
GB
United Kingdom
Prior art keywords
layer
edging
edge
edging beam
approximately
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Withdrawn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
GB0426801A
Other versions
GB0426801D0 (en
Inventor
Colin Andrew Loveday
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.)
Tarmac Ltd
Original Assignee
Tarmac 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 Tarmac Ltd filed Critical Tarmac Ltd
Priority to GB0426801A priority Critical patent/GB2421973A/en
Publication of GB0426801D0 publication Critical patent/GB0426801D0/en
Publication of GB2421973A publication Critical patent/GB2421973A/en
Withdrawn legal-status Critical Current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
    • 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
    • E01C19/48—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • E01C19/4886—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 laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ for forming in a continuous operation kerbs, gutters, berms, safety kerbs, median barriers or like structures in situ, e.g. by slip-forming, by extrusion
    • 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
    • E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/221—Kerbs or like edging members, e.g. flush kerbs, shoulder retaining means ; Joint members, connecting or load-transfer means specially for kerbs
    • E01C11/222—Raised kerbs, e.g. for sidewalks ; Integrated or portable means for facilitating ascent or descent
    • 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
    • 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
    • E01C9/00—Special pavings; Pavings for special parts of roads or airfields

Abstract

A method is provided of compacting an edge (4) of a layer of material (3), comprising the steps of laying an edging beam (1) on a substrate (2), laying the layer of material (3) on the substrate (2) such that the edge (4) of the layer of material (3) to be compacted is adjacent the edging beam (1), and compressing the layer of material (3) such that the edge (4) thereof presses against the edging beam (1) compacting the edge (4) of the layer of material (3). Using this method, the edge (4) of the layer of material (3) can be sufficiently compacted to achieve a satisfactory void content thereof. The possibility of weak edges of the layer of material (3) is reduced.

Description

Title: Compaction of Edges of a Layer of Material
Description of Invention
The invention relates to the compaction of one or more edges of a layer of material, and particularly, but not exclusively, to the compaction of one or more edges of a layer of asphalt.
Asphalt is a commonly used material, for example in the construction of road pavement structures. It is often placed in one or more layers, and each layer is usually compacted, i.e. compressed for example by a rolling machine.
This causes the constituents of the asphalt to interlock, and decreases the void content, i.e. the air content, of the asphalt. This produces a good quality asphalt pavement layer.
Current compaction methods work well, except at unconfined edges of the asphalt layer. Here, achieving sufficient compaction to result in a satisfactory void content of the edge of the asphalt is difficult. This results in edges which are weak in comparison to the remainder of the asphalt layer, which is undesirable.
According to a first aspect of the invention there is provided a method of compacting an edge of a layer of material, comprising the steps of: laying an edging beam on a substrate, laying the layer of material on the substrate such that the edge of the layer of material to be compacted is adjacent the edging beam, compressing the layer of material such that the edge thereof presses against the edging beam compacting the edge of the layer of material.
Using this method, the edge of the layer of material can be sufficiently compacted to achieve a satisfactory void content thereof. The possibility of weak edges of the layer of material is reduced. The method may comprise compaction of the edge of the layer of material to achieve a void content thereof which lies in the range of approximately 1% to approximately 7%.
The method may comprise laying the edging beam on the substrate by extruding the edging beam on the substrate. The edging beam may be extruded on the substrate using an extruding machine. The extruding machine preferably comprises an extruder, which has an adjustable shape and size. Edging beams having different shapes and sizes may then be laid using the same extruding machine.
The method may comprise bonding the edging beam on the substrate.
Preferably, the bonding between the edging beam and the substrate is of sufficient strength that when the edge of the layer of material is pressed against the edging beam, the beam is not displaced with respect to the substrate. The method may comprise bonding the edging beam on the substrate using a bonding agent. The method may comprise bonding the edging beam on the substrate without the use of a bonding agent.
The method may comprise coating at least part of the edging beam. The method may comprise coating a top portion of the edging beam. The method may comprise coating a side of the edging beam. The method may comprise coating at least part of the edging beam with a bitumen emulsion or a bitumenlaggregate mixture.
Preferably, the edging beam has a height which is substantially similar to the thickness of the edge of the layer of material. However, it will be appreciated that the edging beam may have a height which is greater than the thickness of the edge of the layer of material, or less than the thickness of the edge of the layer of material. The edging beam may have a height which lies in the range of approximately 40mm to approximately 200mm. Preferably, the height of the edging beam is such that the beam does not break when the edge of the layer of material is pressed against the beam. The edging beam may have a width at a base portion thereof which lies in the range of approximately 40mm to approximately 200mm.
The edging beam may have a cross sectional shape which is substantially triangular. The edging beam may have a cross sectional shape which is substantially semi-elliptical. The edging beam may have a cross sectional shape which is substantially rectangular.
The edging beam may comprise asphalt. The asphalt may have an aggregate content which lies in the range of approximately 85% to approximately 95% of the total asphalt content, and a bitumen content which lies in the range of approximately 5% to approximately 15% of the total asphalt content. The bitumen may be 10/20 grade bitumen up to 160/220 grade bitumen. The bitumen may comprise polymer modified bitumen.
The edging beam may comprise the same material as the layer of material. When the edging beam and the layer of material comprise asphalt, the asphalt of the edging beam may comprise aggregate of a smaller grade than aggregate of the asphalt of the layer of material, and the asphalt of the edging beam may comprise more bitumen than the asphalt of the layer of material.
The method may comprise compacting two or more edges of the layer of material. The method may comprise compacting one or more edges of two or more layers of material. The method may comprise compacting all of the layer of material.
The method may comprise removing the edging beam after the edge of the layer of material has been compacted. The method may comprise leaving the edging beam in place on the substrate after the edge of the layer of material has been compacted. The edging beam and the layer of material may both form part of a structure, for example a road pavement structure. The material of the edging beam, such as asphalt, may be constituted such that after laying of the beam, it has such properties, such as void content and mechanical properties, that it can be left in place forming a durable element of the structure.
According to a second aspect of the invention there is provided an edging beam for use in the method of the first aspect of the invention.
According to a third aspect of the invention there is provided a method of constructing a pavement structure comprising laying at least one edging beam on a substrate, laying at least one layer of material on the substrate such that an edge of the layer of material is adjacent the edging beam, and compressing the layer of material such that the edge thereof presses against the edging beam compacting the edge of the layer of material.
The pavement structure may be a road pavement structure. The method may comprise laying a plurality of layers of material, and compacting one or more edges of at least some, and preferably all, of the layers.
An embodiment of the invention will now be described, by way of example only, with reference to the drawing which is a schematic cross sectional view through an edging beam and a layer of material.
The figure shows an edging beam 1, laid on a substrate 2, and a layer of material 3, laid on the substrate 2 such that an edge 4 of the layer of material is adjacent a surface 5 of the edging beam 1. The edging beam 1 and the layer of material 3 can comprise part of a road pavement structure.
The edging beam 1 is extruded on the substrate 2 using an extruding machine, and is bonded on the substrate 2. The edging beam 1 has a cross sectional shape which is substantially triangular. The edging beam 1 has a height which is substantially similar to the thickness of the edge 4 of the layer of material 3, lying in the range of approximately 40mm to approximately 200mm. The edging beam 1 has a width at a base portion 6 thereof which lies in the range of approximately 40mm to approximately 200mm.
The edging beam 1 comprises asphalt, having an aggregate content which lies in the range of approximately 85% to approximately 95% of the total asphalt content, and a bitumen content which lies in the range of approximately 5% to approximately 15% of the total asphalt content. The bitumen may be 10/20 grade bitumen up to 160/220 grade bitumen. The bitumen may comprise polymer modified bitumen.
The layer of material 3 comprises a layer of asphalt.
After laying the edging beam 1 and the layer of material 3 on the substrate 2, the edge 4 of the layer of material 3 is compacted. This is achieved by compressing the layer of material 3 using a rolling machine. This causes the edge 4 of the layer of material 3 to be pressed against the surface 5 of the edging beam 1, which allows the edge 4 of the layer of material 3 to be compacted. This also causes compaction of the remainder of the layer of material 3. As the edging beam I is bonded on the substrate 2, when the edge 4 of the layer of material 3 is pressed against the edging beam 1, the beam 1 is not displaced with respect to the substrate 2.
Using this method, the edge 4 of the layer of material 3 can be sufficiently compacted to achieve a satisfactory void content thereof. The possibility of weak edges of the layer of material 3 is reduced. For example, the method may comprise compaction of the edge 4 of the layer of material 3 to achieve a void content thereof which lies in the range of approximately 1% to approximately 7%.
The layer of material 3 comprises further edges, and each of these may be laid adjacent an edging beam and compacted as above. The road pavement structure may comprise one or more further layers of material, and one or more edges of these may be compacted as above. The or each edging beam is preferably left in place after compaction of an adjacent edge of a layer of material, to comprise part of the road pavement structure with the or each layer of material.
When used in this specification and claims, the terms "comprises" and "comprising" and variations thereof mean that the specified features, steps or integers are included. The terms are not to be interpreted to exclude the presence of other features, steps or components.
The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately, or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

Claims (23)

1. A method of compacting an edge of a layer of material, comprising the steps of: laying an edging beam on a substrate, laying the layer of material on the substrate such that the edge of the layer of material to be compacted is adjacent the edging beam, compressing the layer of material such that the edge thereof presses against the edging beam compacting the edge of the layer of material.
2. A method according to claim 1 comprising compaction of the edge of the layer of material to achieve a void content thereof which lies in the range of approximately 1% to approximately 7%.
3. A method according to claim 1 or claim 2 comprising laying the edging beam on the substrate by extruding the edging beam on the substrate.
4. A method according to any preceding claim comprising bonding the edging beam on the substrate.
5. A method according to any preceding claim comprising coating at least part of the edging beam.
6. A method according to any preceding claim in which the edging beam has a height which is substantially similar to the thickness of the edge of the layer of material.
7. A method according to any preceding claim in which the edging beam has a height which lies in the range of approximately 40mm to approximately 200mm.
8. A method according to any preceding claim in which the edging beam has a width at a base portion thereof which lies in the range of approximately 4Omm to approximately 200mm.
9. A method according to any preceding claim in which the edging beam has a cross sectional shape which is substantially triangular.
10. A method according to any of claims 1 to 8 in which the edging beam has a cross sectional shape which is substantially semi-elliptical.
11. A method according to any of claims 1 to 8 in which the edging beam has a cross sectional shape which is substantially rectangular.
12. A method according to any preceding claim in which the edging beam comprises asphalt.
13. A method according to claim 12 in which the asphalt has an aggregate content which lies in the range of approximately 85% to approximately 95% of the total asphalt content, and a bitumen content which lies in the range of approximately 5% to approximately 15% of the total asphalt content.
14. A method according to any preceding claim in which the edging beam comprises the same material as the layer of material.
15. A method according to any preceding claim comprising compacting two or more edges of the layer of material.
16. A method according to any preceding claim comprising compacting two or more edges of one or more layers of material.
17. A method according to any preceding claim comprising compacting all of the layer of material.
18. A method according to any preceding claim comprising leaving the edging beam in place on the substrate after the edge of the layer of material has been compacted.
19. A method according to any preceding claim in which the edging beam and the layer of material both form part of a road pavement structure.
20. A method substantially as described herein with reference to the accompanying drawing.
21. An edging beam for use in the method of any of claims 1 to 20.
22. An edging beam substantially as described herein with reference to the accompanying drawing.
23. A method of constructing a pavement structure comprising laying at least one edging beam on a substrate, laying at least one layer of material on the substrate such that an edge of the layer of material is adjacent the edging beam, and compressing the layer of material such that the edge thereof presses against the edging beam compacting the edge of the layer of material.
GB0426801A 2004-12-07 2004-12-07 Compaction of edges of a layer of material Withdrawn GB2421973A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0426801A GB2421973A (en) 2004-12-07 2004-12-07 Compaction of edges of a layer of material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0426801A GB2421973A (en) 2004-12-07 2004-12-07 Compaction of edges of a layer of material

Publications (2)

Publication Number Publication Date
GB0426801D0 GB0426801D0 (en) 2005-01-12
GB2421973A true GB2421973A (en) 2006-07-12

Family

ID=34073294

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0426801A Withdrawn GB2421973A (en) 2004-12-07 2004-12-07 Compaction of edges of a layer of material

Country Status (1)

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GB (1) GB2421973A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797958A (en) * 1972-10-06 1974-03-19 S Lofaro Cut off plate for curbing machines
US3915584A (en) * 1974-10-02 1975-10-28 Irl Daffin Associates Curb forming apparatus with oppositely directed auger means
US3920349A (en) * 1974-12-02 1975-11-18 Irl Daffin Associates Curb forming apparatus
US4068968A (en) * 1976-07-16 1978-01-17 Phillips Petroleum Company Roadway barrier structure and method of making
GB2116620A (en) * 1982-02-27 1983-09-28 Willis Arnold Charlesworth Asphalt kerbing machine
US5062737A (en) * 1988-03-14 1991-11-05 Samuels Terry G Powered height changer for improved power curber
JP2004316334A (en) * 2003-04-18 2004-11-11 Tatsu Yamamoto Simple asphalt curve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3797958A (en) * 1972-10-06 1974-03-19 S Lofaro Cut off plate for curbing machines
US3915584A (en) * 1974-10-02 1975-10-28 Irl Daffin Associates Curb forming apparatus with oppositely directed auger means
US3920349A (en) * 1974-12-02 1975-11-18 Irl Daffin Associates Curb forming apparatus
US4068968A (en) * 1976-07-16 1978-01-17 Phillips Petroleum Company Roadway barrier structure and method of making
GB2116620A (en) * 1982-02-27 1983-09-28 Willis Arnold Charlesworth Asphalt kerbing machine
US5062737A (en) * 1988-03-14 1991-11-05 Samuels Terry G Powered height changer for improved power curber
JP2004316334A (en) * 2003-04-18 2004-11-11 Tatsu Yamamoto Simple asphalt curve

Also Published As

Publication number Publication date
GB0426801D0 (en) 2005-01-12

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