GB2175032A - A method of resurfacing a road - Google Patents

A method of resurfacing a road Download PDF

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Publication number
GB2175032A
GB2175032A GB08510590A GB8510590A GB2175032A GB 2175032 A GB2175032 A GB 2175032A GB 08510590 A GB08510590 A GB 08510590A GB 8510590 A GB8510590 A GB 8510590A GB 2175032 A GB2175032 A GB 2175032A
Authority
GB
United Kingdom
Prior art keywords
base material
binder
load bearing
bearing surface
broken
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.)
Granted
Application number
GB08510590A
Other versions
GB2175032B (en
GB8510590D0 (en
Inventor
James Mcintosh
Ronald James Goodenough
Graham Beeny
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.)
FIBREDEC Ltd
Original Assignee
FIBREDEC 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 FIBREDEC Ltd filed Critical FIBREDEC Ltd
Priority to GB08510590A priority Critical patent/GB2175032B/en
Publication of GB8510590D0 publication Critical patent/GB8510590D0/en
Publication of GB2175032A publication Critical patent/GB2175032A/en
Application granted granted Critical
Publication of GB2175032B publication Critical patent/GB2175032B/en
Expired legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/10Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
    • E01C7/14Concrete paving
    • E01C7/147Repairing concrete pavings, e.g. joining cracked road sections by dowels, applying a new concrete covering
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00Details of pavings
    • E01C11/005Methods or materials for repairing pavings
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/025Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials for preparing hydraulic-cement-bound mixtures of which at least one ingredient has previously been deposited on the surface, e.g. in situ mixing of concrete
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C21/00Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/065Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00Foundations for pavings
    • E01C3/04Foundations produced by soil stabilisation
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/18Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/187Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping

Abstract

A method of resurfacing a road wherein the base material is broken-up and pulverized to a predetermined depth with the addition of a binder and a fibrous material before relaying. The binder may be bituminous or tar based or may be cement with the fibrous material comprising chopped up fibre glass or polypropylene having a length of 40 to 150mm. Preferably, the so-formed stabilized load bearing surface is provided with a surface covering itself comprising a fibre glass reinforced bituminous material.

Description

SPECIFICATION A method of providing a stabilized load bearing surface This invention relates to a method of providing a stabilized load bearing surface in which the base material to form the surface is broken-up to a predetermined depth and mixed with a binder so that upon setting or curing of the binder stabilized surface is obtained.
While the method is applicable to providing such a surface where the base, the material to be stabilized, is simply the soil or the unprepared ground of a site. it is of particular use for the repair of comparatively lightly used roads such as country roads, where the actual material of the existing road is broken-up and recycled for use as the base material. Thus while conventionally when a road is breaking up to the extent that it is in need of repair to a substantial depth in that its base is not adequate to provide the- necessary support for a simple resurfacing operation, it is conventional to dig out the base of the road, to remove and dump this extracted material and then to rebuild the road base using fresh materials.
This is very expensive both from the point of view of the case of dumping the old material and providing fresh material and from the point of view of the time taken in that the road itself is out of use such that traffic needs to be diverted or delayed over a period of many weeks. The present invention is especially suitable for the repair of such light roads where the base material of the road is recyc16d and bound together to form a base for the subsequent surfacing in that the road can simply be broken-up using a heavy duty rotovator type machine with this broken-up material being consolidated and stabilized without any need to remove material from the site in that the original road surfacing is bound into the stabilized load bearing surface formed.
According to the present invention there is provided a method of providing a stabilized load bearing surface which comprises breaking up the base material to a predetermined depth with binder and fibrous material being mixed with the broken-up base material followed by levelling and smoothing whereby a load bearing surface is provided following setting or curing of the binder. Preferably, the base material is broken-up into particles the larger of which have a maximum dimension in the range 40 to 50mm. Suitably, the fibres comprising the fibrous material may then have a length in the range of 40 to 150mm.
Whether using cement or bitumen or tar based material as binder a suitable proportion of binder mixed with the base material will normally lie in the range of 5-8% by weight; however, before carrying out the process of the invention core samples would be taken of the base to be stabilized and these could result in the percentage of binder being higher or lower than the given normal range. Where the binder is a bitumen or tar based material, preferably a bituminous/water emulsion, the binder is sprayed with the fibrous material into the base material during the breaking-up and mixing of the base material. Where the binder is cement it may be spread on the base material prior to the, or a final, pulverising and mixing operation in which water is added although it is possible to add the cement during the mixing.The fibres can then be added either by being spread on the base material or during the final pulverising and mixing operation. Suitably, the predetermined depth may be up to half a metre although a preferred depth is about a third of a metre. While any suitable fibres may be used it is presently preferred to use glass fibres where the binding material is bituminous or tar based and to use polypropylene fibres where the binder is cement.
The use of the fibrous material is found to provide a surprisingly effective increase in the shear strength of the final stabilized load bearing surface, being particularly useful where the sub-base for the load bearing surface is itself not particularly stable.
While any suitable surface covering or dressing may be applied to the stabilized load bearing surface, it is preferred that the surface covering itself comprises a glass fibre reinforced bituminous or tar based material provided with a surface dressing as described in our British Patent No. 2081603. In a preferred surface coating the bituminous material may comprise an emulsion of 70% bitumen and 30% water.
We will now described various preferred features of the method of the present invention by way of example.
In repairing a light road, the road is brokenup using a self propelled rotovator having a cutting width of 2m and a maximum cutting depth of 370mm. In one embodiment of the machine the picks of the rotovator tools are tungsten tipped and are rotatable at up to 3000rpm with the rotovator itself being capable of advancing at about 12 metres per minute. Operation of this machine reduces the bituminous road surface and sub-grade to an evenly mixed material with, at the same time, jets of a bituminous emulsion being directed into the mixing material with the simultaneous supply of fibre glass in a form of fibre having a length of 40 to 150mm. While the particular emulsion used may be varied depending upon the base material generally a suitable emulsion could be expected to be an A2-50 or A3 class stable or semi- stable emulsion.The fibres are supplied from choppers which are themselves supplied with a tow of fibre glass supplied "cheeses". The use of the bitumen emulsion is particularly useful in that the water content wets the fibre glass and assists binding of the fibre glass to the pulverised base material. While fibre glass is preferred it is possible to use polypropylene or other fibrous material as the fibre addition. Following this pulverising and mixing step the surface of the road is rolled and, following setting or curing, has a surface covering applied thereto. Preferably, the surface covering itself comprises a bituminous or tar based material reinforced with glass fibre and provided with a surface dressing rolled thereon.
Instead of using a bitumen or tar based material it is possible to use cement as the binder. In this case the most convenient way of applying the cement is to spread it evenly over the surface prior to the pulverising operation so that the pulverising operation mixes the spread cement with the base material.
Suitably, the cement can be deposited at about 32kgs per sq.m giving about 7% by weight of the cement with the pulverised base material. During pulverisation water is injected into the mix with the treated surface then being levelled. A surface covering is provided once the base has stabilized following curing of the cement. Suitably, a period of five days could be left after levelling and before applying and rolling the surface covering onto the base. When using cement the chopped fibres can either be applied and spread over the surface at the same time as the cement is applied prior to the final pulverising process or may be applied with the water during the pulverising and mixing process.
In some cases, more than one passage of the rotovator tool may be required, especially where the base material being recycled is substantial. In that case, one would provide a first breaking up operation pass of the rotovator which we followed by levelling operation with cement being spread on the levelled surface prior to a re-pulverising and mixing process with the additional water. Similarly, where using a bitumen or tar based binder it is possible to have a first breaking up operation- without the addition of binder with the binder being added during a subsequent final pulverising and mixing passage of the rotovator.
While in the exemplary description- above we have referred to the repair and recycling of the base material of light roads. It should be noted that the process of the present invention is also applicable to the binding of soil or generally unprepared base material where a load bearing surface is required to be provided immediately on a site. Generally, either bitumen or cement may be used as binder as indicated above although on lime or clay soils cement is more suitable.

Claims (20)

1. A method of providing a stabilized load bearing surface which comprises breaking up the base material to a predetermined depth with binder and fibrous material being mixed with the broken-up base material followed by levelling and smoothing whereby a load bearing surface is provided following setting or curing of the binder.
2. A method according to claim 1, wherein the base material is broken-up into particles the larger of which have a maximum dimension in the range of 40 to 50mm.
3. A method according to claim 1 or 2, wherein the fibres comprising the fibrous material have a length in the range of 40 to 150mm.
4. A method according to any preceding claim wherein 5-8% by weight of binder is mixed with the base material.
5. A method according to any preceding claim wherein the binder comprises a bitumen or tar based material.
6. A method according to claim 5, wherein the binder is bitumen/water emulsion.
7. A method according to claim 5 or 6, wherein the binder is sprayed with the fibrous material into the base material during breaking up and mixing of the base material.
8. A method according to any one of claims 1 to 4 wherein the binder comprises cement.
9. A method according to claim 8, wherein the cement is spread on the base material and is then mixed in with the base material during pulverising thereof with the simultaneous addition of water.
10. A method according to claim 9, wherein the fibres are spread with the cement on the surface of the base material.
11. A method according to claim 9, wherein the fibres are added at the same time as the water during pulverising and mixing.
12. A method according to any preceeding claim wherein the fibrous material comprises glass fibres.
13. A method according to any one of claims 1 to 11 1 wherein the fibrous material compries polypropylene or other man-made fibres.
14. A method according to any preceding claim wherein the base material is an existing road or other load bearing surface which is broken-up to the predetermined depth.
15. A method according to any one of claims 1 to 13, wherein the base material is soil.
16. A method according to any preceding claim, wherein the predetermined depth is up to half a metre.
17. A method according to any preceeding claim, wherein the base material is broken-up using a rotovator-type tool.
18. A method according to any preceeding claim, wherein the stabilized load bearing surface is provided with a surface covering.
19. A method according to claim 18, wherein the surface covering comprises a glass fibre reinforced bituminous or tar based material provided with a surface dressing.
20. A method of providing a stabilized load bearing surface substantially as hereinbefore described.
CLAIMS Claim 1 above has been textually amended.
New or textually amended claims have been filed as follows: 1 A method of providing a stabilized load bearing surface which comprises breaking up the base material in situ to a predetermined depth with binder and fibrous material being mixed with the broken-up base material followed by levelling and smoothing whereby a load bearing surface is provided following setting or curing of the binder.
GB08510590A 1985-04-25 1985-04-25 A method of resurfacing a road Expired GB2175032B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08510590A GB2175032B (en) 1985-04-25 1985-04-25 A method of resurfacing a road

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08510590A GB2175032B (en) 1985-04-25 1985-04-25 A method of resurfacing a road

Publications (3)

Publication Number Publication Date
GB8510590D0 GB8510590D0 (en) 1985-05-30
GB2175032A true GB2175032A (en) 1986-11-19
GB2175032B GB2175032B (en) 1988-02-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286531A1 (en) * 1987-04-09 1988-10-12 BEUGNET, Société anonyme dite Process for regenerating worn pavings
EP0636747A1 (en) * 1993-07-31 1995-02-01 Courtaulds Espana, S.A. Procedure for the controlled transformation and application of fibers in situ in civil and road constructions
FR2727703A1 (en) * 1994-12-02 1996-06-07 Orgel METHOD AND DEVICE FOR STRENGTHENING SOILS WITH FIBROUS ADDITIVES
GB2378447A (en) * 2001-08-06 2003-02-12 Tileprint Paving Ltd Road repair material
FR2906270A1 (en) * 2006-09-27 2008-03-28 Chaussees Tech Innovation Sarl FIBER REINFORCED COMPACT ROLLING CONCRETE COMPOSITION COMPRISING BITUMINOUS FRAISATS AND METHOD OF MAKING A PAVEMENT

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109778657B (en) * 2019-03-29 2023-07-07 哈尔滨康力鸿商贸有限公司 Quick maintenance method for cement pavement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2037850A (en) * 1978-11-20 1980-07-16 Wirtgen Reinhard Method and apparatus for abrading and recoating road pavements
GB2081603A (en) * 1980-05-14 1982-02-24 Car Deck Maintenance Ltd Surface dressing
EP0081194A1 (en) * 1981-12-03 1983-06-15 Walter Schölkopf Bituminous pavement repair method
GB2121853A (en) * 1982-06-16 1984-01-04 Car Deck Maintenance Ltd Applicator for applying a surface dressing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2037850A (en) * 1978-11-20 1980-07-16 Wirtgen Reinhard Method and apparatus for abrading and recoating road pavements
GB2081603A (en) * 1980-05-14 1982-02-24 Car Deck Maintenance Ltd Surface dressing
EP0081194A1 (en) * 1981-12-03 1983-06-15 Walter Schölkopf Bituminous pavement repair method
GB2121853A (en) * 1982-06-16 1984-01-04 Car Deck Maintenance Ltd Applicator for applying a surface dressing

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0286531A1 (en) * 1987-04-09 1988-10-12 BEUGNET, Société anonyme dite Process for regenerating worn pavings
FR2613737A1 (en) * 1987-04-09 1988-10-14 Beugnet Sa METHOD FOR REGENERATING AN OLD PAVEMENT COATING
EP0636747A1 (en) * 1993-07-31 1995-02-01 Courtaulds Espana, S.A. Procedure for the controlled transformation and application of fibers in situ in civil and road constructions
FR2727703A1 (en) * 1994-12-02 1996-06-07 Orgel METHOD AND DEVICE FOR STRENGTHENING SOILS WITH FIBROUS ADDITIVES
EP0716187A1 (en) * 1994-12-02 1996-06-12 Orgel Process and apparatus for reinforcing soil with fibrous additives
AU698936B2 (en) * 1994-12-02 1998-11-12 Orgel Method and device for reinforcing the ground using fibrous additives
GB2378447A (en) * 2001-08-06 2003-02-12 Tileprint Paving Ltd Road repair material
FR2906270A1 (en) * 2006-09-27 2008-03-28 Chaussees Tech Innovation Sarl FIBER REINFORCED COMPACT ROLLING CONCRETE COMPOSITION COMPRISING BITUMINOUS FRAISATS AND METHOD OF MAKING A PAVEMENT
WO2008037911A2 (en) * 2006-09-27 2008-04-03 Cti Chaussees Techniques Innovation Composition of rolled and compacted concrete reinforced with fibres and including bituminous chippings and method for making a pavement using said composition
WO2008037911A3 (en) * 2006-09-27 2008-05-22 Cti Chaussees Tech Innovation Composition of rolled and compacted concrete reinforced with fibres and including bituminous chippings and method for making a pavement using said composition

Also Published As

Publication number Publication date
GB2175032B (en) 1988-02-17
GB8510590D0 (en) 1985-05-30

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970425