EP2084115A2 - Composition de beton roule compacte renforce de fibres comprenant des fraisats bitumineux et procede de realisation d'une chaussee a partir de ladite composition - Google Patents
Composition de beton roule compacte renforce de fibres comprenant des fraisats bitumineux et procede de realisation d'une chaussee a partir de ladite compositionInfo
- Publication number
- EP2084115A2 EP2084115A2 EP07848350A EP07848350A EP2084115A2 EP 2084115 A2 EP2084115 A2 EP 2084115A2 EP 07848350 A EP07848350 A EP 07848350A EP 07848350 A EP07848350 A EP 07848350A EP 2084115 A2 EP2084115 A2 EP 2084115A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- composition
- bituminous
- aggregates
- composition according
- 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- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- 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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/065—Recycling 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
-
- 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
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/12—Mortar-bound paving
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/012—Discrete reinforcing elements, e.g. fibres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Definitions
- the present invention relates to a compacted rolled concrete composition reinforced with metal fibers and containing a variable proportion of recycled bituminous materials resulting from the deconstruction of roadways, as well as to a process for producing continuous pavements or industrial areas without attached from this composition.
- BAC continuous reinforced concrete process
- compacted rolled concrete compositions allow, for at least equal mechanical performance, a reduction in the cement content of the order of 20% because of both a reduction in the order 15% of the water content and also a higher density obtained by compaction with heavy equipment (and not by a mere pervibration with vibrating needles).
- the lower water content makes it possible to use the material with an asphalt paver finisher, then compact it with a heavy vibratory compactor and a tire compactor usually weighing 3 tonnes per wheel.
- the compacted rolled concrete has the advantage of an immediate lift which allows the traffic of the construction trucks: thus it is possible to implement the bituminous wearing course as soon as the compaction of the compacted concrete is finished, which makes it possible to open the pavement to the circulation as soon as the bituminous mix is cooled, that is to say after a very short delay of the order of 4 hours.
- the consistency of the pervious cast concrete requires an implementation with the traditional techniques of slipping machine or vibrating rule and not allows re-circulation until after a sufficient setting time which is usually 7 days.
- metal fibers used in perverted concrete in industrial slabs are most often drawn fibers, in particular hook fibers such as those marketed by Bekaert under the trademark “Dramix”, corrugated fibers such as those marketed by the company. Trefil Arbed or the total anchored fiber marketed under the trademark “Twincone” by Trefil Arbed.
- the document EP 1 278 925 describes a compacted rolled concrete composition reinforced with metal fibers, for the realization of a continuous road without joint which offers good properties in terms of the number of cracks and control of the opening of these cracks.
- This composition comprises metal fibers of a particular type, at a dosage of 30 kg to 40 kg per cubic meter of concrete.
- Metal fibers are described in detail in this document and may be defined by the fact that they consist of substantially cylindrical son having a substantially straight longitudinal central portion extending on each side through a spacer portion of a portion of curved end whose shape is of the type which prevents the attachment of two neighboring fibers, said threads having a diameter of between 0.38 and 1.05 mm, a total length of between 19 and 80 mm, a length of the parts of end between 1.5 and 4 mm, a transverse offset between the central portion and each end portion of at least 0.75 mm, an obtuse angle of not more than 160 ° between each intermediate portion and the central portion , an obtuse angle between each intermediate portion and end portion, a minimum tensile strength of 900N / mm2.
- the planed elements are therefore constituted in variable proportions, depending on the case and the type of pavement, bituminous materials from the wearing courses and basecoats of pavements, and possibly from materials treated with hydraulic binders from pavement foundation layers.
- Bituminous blasting thus comes from the deconstruction of bituminous pavements for which the original material was manufactured in hot asphalt plants, with a bitumen dosage generally between 4.2% and 5% of the weight of aggregates.
- Bituminous blasting is therefore composed of natural aggregates which remain coated with a film of bitumen.
- bituminous blotches can be partially recycled for the manufacture of bituminous mixes in hot-mix asphalt plants, but generally at a maximum rate of 25% in most existing installations, with higher rates being possible. achieved with particular technologies, to date with a maximum of 35% to 50%. Indeed, the introduction of spoilage firstly poses material problems related to hot-dip tube technology and the limits of the corresponding device called ring recycling. In addition, the heating of the costs entails an aging of the bitumen whose mechanical properties are thus degraded. As a result, the quality criteria for the manufacture and implementation of hot-mix asphalt usually limit the maximum amount of recycled bituminous paste in the final mixture to a maximum of 25%.
- the object of the invention is to provide a compacted rolled concrete composition containing bituminous blast which does not exhibit, at least, some of the aforementioned disadvantages of the prior art.
- composition can be implemented with the asphalt mix application workshops, that is to say, finisher and compactors.
- the reference in terms of evaluation of the control of cracking is the Technical Guide for the Maintenance of Concrete Pavements, published by the Roads and Highways Technical Service associated with the Central Bridges and Roads Laboratory (October 2002), which provides for different severity levels for slab beats measured between crack edges.
- the beat is measured under the passage of a 13-tonne axle with roadside equipment called the Lacroix deflectograph.
- Level 1 corresponding to the lowest severity for which no maintenance intervention is required, is set at a beat threshold of less than 20 hundredths of a millimeter.
- the invention provides a fiber-reinforced compacted rolled concrete composition
- a fiber-reinforced compacted rolled concrete composition comprising aggregates, a hydraulic binder and metal fibers, the hydraulic binder content being between 150 and 400 kg per cubic meter of concrete and the water content being between 90 and 160 liters per cubic meter of concrete, characterized in that said aggregates comprise bituminous blotches, the dosage of metal fibers being at most 25 kg per cubic meter of concrete.
- the metal fibers are those described in EP 1 278 925, that is to say that they consist of substantially cylindrical son having a substantially rectilinear longitudinal central portion extending on each side via a intermediate portion of a curved end portion whose shape is of the type which prevents the attachment of two adjacent fibers, said wires having a diameter of between 0.38 and 1.05 mm, a total length of between 19 and 80 mm, a length of the end portions between 1.5 and 4 mm, a transverse offset between the central portion and each end portion of at least 0.75 mm, an obtuse angle of not more than 160 ° between each intermediate portion and the portion central, an obtuse angle between each intermediate portion and end portion, a minimum tensile strength of 900 N / mm 2 .
- This composition makes it possible to recycle, in the cold, a high proportion of bituminous mix and thus requires only a limited consumption of new aggregates coming from the quarries.
- bituminous materials manufactured in the HMA positions at a temperature generally on the order of 150 0 C without heating the aggregates in the present composition avoids the corresponding consumption of fuel or of natural gas.
- a fiber dosage of less than or equal to 25 kg per cubic meter of concrete is sufficient to achieve the objective of satisfactory charge transfer and controlled cracking with a crack opening of less than 1 millimeter, without which it is necessary to implement the technique of continuous reinforced concrete.
- the dosage of metal fibers is between 20 and 25 kg per cubic meter of concrete.
- the aggregates comprise between 10% and 90% of bituminous straws.
- the granular mixture comprises at least 40% of bituminous drums.
- said aggregates comprise between 0% and 50% corrector sand.
- said aggregates comprise between 0% and 50% of crushed cement concrete resulting from the demolition of pavements, buildings or various works.
- the composition has a content of plasticizer adjuvant and / or retarder at most equal to 1, 8% by weight of hydraulic binder.
- the concrete composition according to the invention offers a particularly advantageous behavior in terms of control of cracking. Specifically, the spacing between cracks is generally greater than 20 meters and the opening of these cracks varies between 0.2 mm and 1 mm maximum. Such cracking behavior allows good load transfer between cracks edges and thus avoids damage related to the so-called slabbing phenomenon frequently found on perverted concrete pavements.
- the invention also provides a method for producing continuous pavements or industrial areas without joints, characterized in that it comprises the step of producing a compacted rolled reinforced concrete layer of fibers from the composition according to the invention above.
- the method can be realized:
- the on-site recycling comprises the steps of: - spreading metal fibers and a hydraulic binder on a road to be reconstructed comprising a bituminous material;
- the method comprises the step of adding new aggregates, mills or recycled aggregates in the materials spread on the road to be rebuilt, in a proportion of between 10% and 90%.
- the new aggregates comprise a correction sand.
- the aggregates added comprise a proportion of crushed cement concrete from the demolition of pavements, buildings or various works.
- FIGS. 1 and 2 are graphs showing the evolution of the mechanical properties of compositions according to embodiments of the invention, as a function of the rate of bituminous blasting.
- Table I The study illustrated in Table I only deals with concrete matrices before the introduction of metal fibers, in order to isolate the phenomena related to the action of the bituminous mix in the aggregate mixture.
- the compositions 2, 3 and 4 are formulated for the use of the metal fibers described in the document EP 1 278 925 and sold in particular by the company Bekaert under the trademark "Dramix 80/60".
- the new aggregates are chippings with a granularity of 6/10 mm and 10/14 mm, with the addition of a 2/6 mm sand and a corrective sand 0 / 4 mm.
- Corrective sand is a rolled river sand that serves both to optimize the grain size curve according to the French standard NF P 98-128 and to facilitate the compaction of the final material on site, the aim being to obtain the highest density possible for an increase in resistance.
- the new granulate is the same 0/4 mm corrector sand as for compositions 2 and 3; bituminous drums come from a stock on a coating station, the granularity being 0/10 mm.
- compositions 1 and 2 do not include bituminous blotches and are given for reference.
- the composition 1 is a pervious cast concrete and the composition 2 is a compacted rolled concrete comprising a lower water dosage of 45 liters relative to the composition 1, a reduction of the water content of 28%.
- the study illustrated in Table I thus confirms that, despite a lower cement dosage of 50 kg, a reduction of 15%, the resistance of the compacted rolled concrete, that is to say 4.5 MPa, is greater 25% to that of perverted cast concrete which is 3.4 MPa.
- Composition 3 comprises 40% of bituminous blot in a formulation of new aggregates of compacted rolled concrete, resulting in a bitumen content of 2.05% in the mixture thus obtained.
- Table I shows that the strength of the composition 3 is 2.54 MPa, a decrease of 44% compared to the composition 2 whose resistance is 4.5 MPa .
- the modulus of elasticity also decreases by about 50% by comparing the two compositions 2 and 3.
- the introduction of bituminous blot in proportion of 40% in a mixture of new aggregates therefore leads to reduce both the resistance and the modulus of elasticity by a factor of the order of 2.
- Composition 4 comprises 90% bituminous blotches, ie 4.6% bitumen, in compacted rolled concrete. At the same dosage cement that the composition 1 which contains 100% new aggregates, Table I shows this time a decrease in strengths and modulus of elasticity in a factor of 3.
- bituminous pavements in wearing course manufactured with 5% of grade 60/70 bitumen, have a modulus of elasticity in the range of 5,000 to 6,000 MPa at a temperature of 15 ° C and a dynamic test frequency of 10 Hz.
- the low-bitumen manufactured at 4.2% or 4.5% of bitumen and used as a basecoat pavement have a module of the order of 9 000 MPa under the same test conditions.
- high modulus bituminous mixes which are manufactured with 35/50 grade hard bitumens or with modified bitumens, for example by polymers. With modules of the order of 14,000 MPa under the above test conditions, high-modulus asphalt pavements reduce pavement base layer thicknesses because of their higher stiffness than conventional low-density asphalt pavements. .
- FIGS. 1 and 2 of the accompanying drawings show the respective evolutions of the splitting resistances and the modulus of elasticity (in static compression at a temperature of 20 ° C.) of the various compositions 2 to 4 of the aforementioned Table I, as a function of the bituminous paste content.
- a compacted rolled concrete dosed at 280 kg of cement and containing from 60% to 70% of bituminous drums, a bitumen content of the order of 3% to 3.5% has a modulus of elasticity, so a stiffness, close to that of a high-modulus bituminous mix generally dosed at 5% of bitumen.
- This result is unexpected because according to the invention there is obtained a hybrid material, formulated with a relatively strong cement dosage and containing relatively little bitumen, which nevertheless shows a viscoelastic mechanical behavior close to that of a high modulus bituminous mix.
- the material according to the invention is interesting because it has the same structural power, at the same time:
- composition described in document EP 1 278 925 gives good results in terms of controlling cracking of pavements for a fiber dosage of the order of 30 to 40 kg per cubic meter of concrete.
- a correlation has been observed between the stiffness of a material treated with a hydraulic binder (cement or blast furnace slag in particular) and its cracking behavior in pavements in service, with a decrease in cracking which is parallel to the decrease in the modulus of elasticity of the material.
- compositions 3 and 4 make it possible to produce a compacted rolled concrete layer for continuous pavements or industrial areas without joints.
- the thickness of the compacted rolled concrete layer is very close, within half a centimeter, to the thickness required for composition 2 described in document EP 1 278 925.
- the thickness may be from 7 to 20 cm.
- the compacted rolled concrete layer may be covered, for example, with a bituminous asphalt surface course selected, for example, for its ability to drain rain water and / or to limit the emission of noise.
- hydraulic binder and new or recycled aggregates could be used, for example crushed cement concrete from the deconstruction of rigid pavements or other concrete structures.
- levels of hydraulic binders, water and adjuvant can be modified, within limits allowing an implementation of the composition with the techniques generally used with compacted rolled concrete.
- the fiber dosing means described in EP 1 324 865 can be installed on a self-propelled semi-trailer unit which allows it a high mobility. This is why the manufacture of the composition can be carried out using a recycling workshop in cold place of the roadway, by the use of the aforementioned dosing means for the fibers, associated with materials specifically adapted as for example the ARC 700 or the EMF 200 developed by the company Eiffage Travaux Publics or the MARINI CoId Recycler MCR 250 developed by the company FAYAT. These materials have the advantage of mobility while being equipped with a continuous mixer as that of the continuous plants described in the document EP 1 324 865. The judicious combination of these materials thus allows to obtain a good quality of mixing and drying.
- the proportion of corrective sand is generally of the order of 10 to 20% in the granular mixture, which corresponds to a use of 80 to 90% of the materials of the site;
- the spreading of the binder is carried out above the fiber-covered corrective sand layer, for example with ARC dosing equipment developed by the company Eiffage
- Milling is performed on a variable thickness according to the sizing calculation of the roadway to be reinforced, for example using a machine marketed by Wirtgen.
- the milling operation can also be carried out for example with a material of the ARC 700 type of the company Eiffage Travaux
- this machine also ensures the mixing of the composition; e. mixing and implementation of the composition with, for example, EMF 200 material from Eiffage Travaux Publics or equivalent material such as MARINI CoId
- Steps a. have. above ground recycling can be carried out successively without waiting time between them, this due to the immediate lift of the material according to the composition of the present invention, a material that allows the circulation of trucks and construction equipment for the implementation of the bituminous wearing course.
- the pavement thus recycled can therefore be opened to traffic as soon as the wearing course is cooled, that is to say about half a day after the application of the latter.
- the recycling in place also has the advantage of limiting transportation costs and fuel consumption by avoiding the displacement, by trucks, of the materials to be recycled to the plant and then their return to the site.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0608503A FR2906270B1 (fr) | 2006-09-27 | 2006-09-27 | Composition de beton roule compacte renforce de fibres comprenant des fraisats bitumineux et procede de realisation d'une chaussee |
PCT/FR2007/051978 WO2008037911A2 (fr) | 2006-09-27 | 2007-09-20 | Composition de beton roule compacte renforce de fibres comprenant des fraisats bitumineux et procede de realisation d'une chaussee a partir de ladite composition |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2084115A2 true EP2084115A2 (fr) | 2009-08-05 |
Family
ID=37939606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07848350A Withdrawn EP2084115A2 (fr) | 2006-09-27 | 2007-09-20 | Composition de beton roule compacte renforce de fibres comprenant des fraisats bitumineux et procede de realisation d'une chaussee a partir de ladite composition |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2084115A2 (fr) |
FR (1) | FR2906270B1 (fr) |
WO (1) | WO2008037911A2 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103803914A (zh) * | 2013-12-25 | 2014-05-21 | 新疆研科节能科技有限公司 | 碾压快固混凝土及其制备方法和使用方法 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110761156A (zh) * | 2019-11-08 | 2020-02-07 | 南通威而多专用汽车制造有限公司 | 电动式路缘石滑膜摊铺机 |
CN111576162A (zh) * | 2020-05-13 | 2020-08-25 | 内蒙古路桥集团有限责任公司 | 乳化沥青厂拌冷再生路面施工工艺 |
CN114956678A (zh) * | 2022-04-24 | 2022-08-30 | 路爱君 | 沥青混凝土铣刨料再生水泥混凝土及其制备工艺 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2175032B (en) * | 1985-04-25 | 1988-02-17 | Fibredec Ltd | A method of resurfacing a road |
FR2808522B1 (fr) * | 2000-05-03 | 2003-01-10 | Chaussees Tech Innovation | Composition de beton roule compacte renforce de fibres et procede de realisation d'une chaussee a partir de ladite composition |
EP1634858A1 (fr) * | 2004-09-13 | 2006-03-15 | Losinger Construction S.A. | Beton hydraulique |
-
2006
- 2006-09-27 FR FR0608503A patent/FR2906270B1/fr not_active Expired - Fee Related
-
2007
- 2007-09-20 WO PCT/FR2007/051978 patent/WO2008037911A2/fr active Application Filing
- 2007-09-20 EP EP07848350A patent/EP2084115A2/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2008037911A2 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103803914A (zh) * | 2013-12-25 | 2014-05-21 | 新疆研科节能科技有限公司 | 碾压快固混凝土及其制备方法和使用方法 |
CN103803914B (zh) * | 2013-12-25 | 2016-04-27 | 新疆研科节能科技有限公司 | 碾压快固混凝土及其制备方法和使用方法 |
Also Published As
Publication number | Publication date |
---|---|
WO2008037911A3 (fr) | 2008-05-22 |
WO2008037911A2 (fr) | 2008-04-03 |
FR2906270A1 (fr) | 2008-03-28 |
FR2906270B1 (fr) | 2008-11-14 |
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