EP0182748A2 - Method for the cold milling of surface layers of roadway coverings - Google Patents

Method for the cold milling of surface layers of roadway coverings Download PDF

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Publication number
EP0182748A2
EP0182748A2 EP85810547A EP85810547A EP0182748A2 EP 0182748 A2 EP0182748 A2 EP 0182748A2 EP 85810547 A EP85810547 A EP 85810547A EP 85810547 A EP85810547 A EP 85810547A EP 0182748 A2 EP0182748 A2 EP 0182748A2
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Prior art keywords
composition
milled material
liquid composition
liquid
layers
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Granted
Application number
EP85810547A
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German (de)
French (fr)
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EP0182748A3 (en
EP0182748B1 (en
Inventor
Jean Beauverd
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Colas SA
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Colas SA
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Priority to AT85810547T priority Critical patent/ATE50012T1/en
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Publication of EP0182748A3 publication Critical patent/EP0182748A3/en
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Publication of EP0182748B1 publication Critical patent/EP0182748B1/en
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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
    • 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
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping

Definitions

  • the invention relates to a method of cold milling the surface layers of the pavement covering in which the milled material is recovered with a view to its reuse. It also relates to a machine implementing said process and the use of the milled material obtained according to this process.
  • Maintenance of the road surface may, among other things, use so-called cold milling techniques.
  • the surface layers of the coating are removed by milling, with a view to lowering and regularizing the level of the surface, thus preparing it to receive a new coating.
  • resulting materials can then be either eliminated or reused, if necessary after subsequent storage and reprocessing.
  • precise reuse of the resulting materials for example as a foundation layer or for pavement adjustment, it is then necessary to subject one or more additional treatments to the milled material, so that it acquires the quality compaction required.
  • Such processing can only be carried out at the cost of additional operations and using ancillary facilities, which increase the total cost of all operations accordingly.
  • an aqueous composition such as an aqueous solution or suspension or simply water.
  • an organic composition such as a solvent or a mixture of organic solvents, for example toluene, heavy or light aliphatic hydrocarbons or other petroleum distillation residues.
  • organic composition it is also advantageous to use a binder or mixture of anhydrous binders, such as lacquers or so-called "cut-back" binders.
  • an aqueous organic composition such as an emulsion of bitumen or tar for example.
  • the nature of the liquid composition will in fact depend on the use assigned to the milling material, in accordance with current practices.
  • the quantity of liquid composition to be incorporated into the milling material is calculated as a function of the various parameters making it possible to define the milling material: this quantity will in particular be a function of the mass of milled material collected, of the particle size curve of said material , the angularity of the grains constituting said material and the compaction energy accepted according to standard SN 670 330 a (PROCTOR test or similar).
  • the quantity of liquid composition thus calculated will be that which makes it possible to obtain a milled material with an optimum content of compacting liquid.
  • additional mixing can be carried out in order to obtain optimal homogenization of the material mixed with the liquid composition.
  • Such mixing can be carried out on the same milling site, immediately after the incorporation of the liquid composition or during a separate step, in an appropriate installation.
  • the method of the invention can be suitably implemented using a cold milling machine comprising a device for storing the composite. tion, a device for bringing the liquid composition into the milling zone and a device for dosing the liquid-incorporated composition into the milled material.
  • any known means can be used, such as a tank for example, fixed on the machine itself or on an auxiliary vehicle, the device bringing the liquid composition to the desired level then being arranged accordingly.
  • a metering pump is preferably used, controlled by the speed of advance of the machine. The control of such a pump can be achieved using any suitable known means, for example using an independent tachometer, a tachometer connected to the transmission system of the machine or the milling element of said machine, or through the PTO of the milling element of the machine.
  • the pump flow (Q) is then determined as follows:
  • the milled material resulting from the process according to the invention can be reused immediately or after intermediate storage, in particular for the preparation of foundation layers, adjustment layers or wear layers of roadways.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Road Repair (AREA)
  • Road Paving Structures (AREA)
  • Road Signs Or Road Markings (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

1. A process for the preparation of a carriageway surfacing material from the material recovered when the top layers of carriageways are cold-milled, characterized in that a predetermined amount of an aqueous, organic or aqueous-organic liquid composition is incorporated into the milled material during the milling operation, said amount being calculated so that a material with the optimum content of compaction liquid is obtained in one operation.

Description

L'invention se rapporte à un procédé de fraisage à froid des couches superficielles du revêtement de chaussées dans lequel le matériau fraisé est récupéré en vue de sa réutilisation. Elle a également pour objet une machine mettant en oeuvre ledit procédé et l'utilisation du matériau fraisé obtenu selon ce procédé.The invention relates to a method of cold milling the surface layers of the pavement covering in which the milled material is recovered with a view to its reuse. It also relates to a machine implementing said process and the use of the milled material obtained according to this process.

L'entretien du revêtement de chaussées peut faire entre autre appel à des techniques dites de fraisage à froid. Lors de telles opérations, sans traitement préalable particulier, on élimine par fraisage les couches superficielles du revêtement, en vue d'abaisser et de régulariser le niveau de la surface, la préparant ainsi à recevoir un nouveau revêtement.Maintenance of the road surface may, among other things, use so-called cold milling techniques. During such operations, without special prior treatment, the surface layers of the coating are removed by milling, with a view to lowering and regularizing the level of the surface, thus preparing it to receive a new coating.

Au cours du fraisage, selon les cas, on se contente de réduire l'émission de poussières en injectant de l'eau dans ce système, le plus généralement au niveau de la zone de fraisage proprement dite. Les matériaux résultants peuvent être alors soit éliminés soit réutilisés, le cas échéant après stockage et retraitement subséquents. Dans le cas d'une réutilisation précise des matériaux résultants, par exemple comme couche de fondation ou de réglage de chaussées, il est alors nécessaire de faire subir un ou plusieurs traitements complémentaires au matériau fraisé, de façon à ce qu'il acquière la qualité de compactage souhaitée. De tels traitements ne peuvent être exécutés qu'au prix d'opérations supplémentaires et à l'aide d'installations annexes, qui renchérissent d'autant le coût total de l'ensemble des opérations.During milling, depending on the case, it is sufficient to reduce the emission of dust by injecting water into this system, most generally at the level of the milling area proper. The resulting materials can then be either eliminated or reused, if necessary after subsequent storage and reprocessing. In the case of precise reuse of the resulting materials, for example as a foundation layer or for pavement adjustment, it is then necessary to subject one or more additional treatments to the milled material, so that it acquires the quality compaction required. Such processing can only be carried out at the cost of additional operations and using ancillary facilities, which increase the total cost of all operations accordingly.

De tels inconvénients peuvent être aisément surmontés par la mise en oeuvre du procédé défini à la revendication 1. Au cours dudit procédé en effet, on incorpore au matériau fraisé une composition liquide en quantité prédéterminée, calculée de façon à obtenir, en une seule opération, un matériau à teneur en liquide de compactage optimale, en vue de la réutilisation désirée.Such drawbacks can be easily overcome by implementing the method defined in claim 1. In fact during said method, a liquid composition in predetermined quantity is incorporated into the milled material, calculated so as to obtain, in a single operation, a material with an optimal compacting liquid content, with a view to the desired reuse.

Selon l'invention, on peut avantageusement utiliser, à titre de composition liquide, une composition aqueuse telle une solution ou une suspension aqueuse ou simplement de l'eau. On peut également utiliser une composition organique tel un solvant ou un mélange de solvants organiques, par exemple du toluène, des hydrocarbures aliphatiques lourds ou légers ou d'autres résidus de distillation de pétrole. A titre de composition organique, on peut en outre avantageusement utiliser-un liant ou mélange de liants anhydres, tel des laques ou des liants dits "cut-back".According to the invention, it is advantageous to use, as liquid composition, an aqueous composition such as an aqueous solution or suspension or simply water. It is also possible to use an organic composition such as a solvent or a mixture of organic solvents, for example toluene, heavy or light aliphatic hydrocarbons or other petroleum distillation residues. As organic composition, it is also advantageous to use a binder or mixture of anhydrous binders, such as lacquers or so-called "cut-back" binders.

Selon l'invention, on peut également utiliser une composition organique aqueuse telle une émulsion de bitume ou de goudron par exemple. La nature de la composition liquide dépendra en fait de l'utilisation assignée au matériau de fraisage, conformément aux pratiques en cours.According to the invention, it is also possible to use an aqueous organic composition such as an emulsion of bitumen or tar for example. The nature of the liquid composition will in fact depend on the use assigned to the milling material, in accordance with current practices.

Selon l'invention, la quantité de composition liquide à incorporer au matériau de fraisage est calculée en fonction des divers paramètres permettant de définir le matériau de fraisage: cette quantité sera notamment fonction de la masse de matériau fraisé recueilli, de la courbe granulométrique dudit matériau, de l'angularité des grains constituant ledit matériau et de l'énergie de compactage admise selon la norme SN 670 330 a (essai PROCTOR ou similaire). La quantité de composition liquide ainsi calculée sera celle qui permet d'obtenir un matériau fraisé à teneur en liquide de compactage optimale.According to the invention, the quantity of liquid composition to be incorporated into the milling material is calculated as a function of the various parameters making it possible to define the milling material: this quantity will in particular be a function of the mass of milled material collected, of the particle size curve of said material , the angularity of the grains constituting said material and the compaction energy accepted according to standard SN 670 330 a (PROCTOR test or similar). The quantity of liquid composition thus calculated will be that which makes it possible to obtain a milled material with an optimum content of compacting liquid.

Si nécessaire, en fonction de la réutilisation assignée au matériau fraisé, on peut effectuer un malaxage complémentaire afin d'obtenir une homogénéisation optimale du matériau mélangé à la composition liquide. Un tel malaxage peut être mis en oeuvre sur les lieux mêmes du fraisage, immédiatement après l'incorporation de la composition liquide ou lors d'une étape séparée, dans une installation appropriée.If necessary, depending on the reuse assigned to the milled material, additional mixing can be carried out in order to obtain optimal homogenization of the material mixed with the liquid composition. Such mixing can be carried out on the same milling site, immediately after the incorporation of the liquid composition or during a separate step, in an appropriate installation.

Le procédé de l'invention peut être convenablement mis en oeuvre à l'aide d'une machine de fraisage à froid comportant un dispositif de stockage de la composition liquide, un dispositif pour amener la composition liquide dans la zone de fraisage et un dispositif pour doser la composition liquide-incorporée au matériau fraisé.The method of the invention can be suitably implemented using a cold milling machine comprising a device for storing the composite. tion, a device for bringing the liquid composition into the milling zone and a device for dosing the liquid-incorporated composition into the milled material.

En guise de dispositif de stockage, on peut utiliser tout moyen connu, tel un réservoir par exemple, fixé sur la machine elle-même ou sur un véhicule annexe, le dispositif amenant la composition liquide au niveau désiré étant alors agencé en conséquence. Comme dispositif permettant le dosage de la composition liquide, on utilise de préférence une pompe doseuse, asservie à la vitesse d'avancement de la machine. L'asservissement d'une telle pompe peut être réalisé à l'aide de tout moyen connu adéquat, par exemple à l'aide d'un tachimètre indépendant, d'un compte-tours branché sur le système de transmission de la machine ou de l'élément fraiseur de ladite machine, ou par l'entremise de la prise de force de l'élément fraiseur de la machine.As a storage device, any known means can be used, such as a tank for example, fixed on the machine itself or on an auxiliary vehicle, the device bringing the liquid composition to the desired level then being arranged accordingly. As a device allowing the dosage of the liquid composition, a metering pump is preferably used, controlled by the speed of advance of the machine. The control of such a pump can be achieved using any suitable known means, for example using an independent tachometer, a tachometer connected to the transmission system of the machine or the milling element of said machine, or through the PTO of the milling element of the machine.

On donnera ci-après, à titre d'exemple, un mode de calcul du débit de la pompe doseuse (composition liquide: liant organique de type cut-back/CB).

  • - poids spécifique du liant: γCB = 0,97 t/m3
  • - % CB optimal : 3% en poids
  • - largeur de fraisage : LF = 2,50 m
  • - épaisseur de fraisage : EF = 0,03 m
  • - vitesse d'avancement du véhicule : V = 2 m/min
  • - poids spécifique du matériau à enrober : γE = 2,4 t/m3
A method of calculating the flow rate of the metering pump will be given below, by way of example (liquid composition: organic binder of cut-back / CB type).
  • - specific weight of the binder: γ CB = 0.97 t / m3
  • -% optimal CB: 3% by weight
  • - milling width: LF = 2.50 m
  • - milling thickness: EF = 0.03 m
  • - vehicle advance speed: V = 2 m / min
  • - specific weight of the material to be coated: γ E = 2.4 t / m3

Le débit de la pompe (Q) se détermine alors comme suit:

Figure imgb0001
Figure imgb0002
Figure imgb0003
 The pump flow (Q) is then determined as follows:
Figure imgb0001
Figure imgb0002
Figure imgb0003

Le matériau fraisé résultant du procédé selon l'invention peut être réutilisé immédiatement ou après un stockage intermédiaire, notamment pour la préparation de couches de fondation, de couches de réglage ou de couches d'usure des chaussées.The milled material resulting from the process according to the invention can be reused immediately or after intermediate storage, in particular for the preparation of foundation layers, adjustment layers or wear layers of roadways.

Claims (8)

1. Procédé de fraisage à froid des couches superficielles du revêtement de chaussées dans lequel le matériau fraisé est récupéré en vue de sa réutilisation, caractérisé en ce qu'au cours dudit procédé, on incorpore au matériau fraisé une composition liquide en quantité prédéterminée, ladite quantité étant calculée pour obtenir en une opération un matériau à teneur en liquide de compactage optimale.1. Method of cold milling the surface layers of the road surface in which the milled material is recovered with a view to its reuse, characterized in that during the said process, a liquid composition is incorporated in the milled material in predetermined quantity, the said quantity being calculated to obtain in one operation a material with optimum content of compacting liquid. 2. Procédé selon la revendication 1, caractérisé en ce qu'on utilise à titre de composition liquide, une composition aqueuse, une composition organique ou une composition organique aqueuse.2. Method according to claim 1, characterized in that an aqueous composition, an organic composition or an aqueous organic composition is used as the liquid composition. 3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce qu'on utilise, à titre de composition liquide, de l'eau, un solvant ou un mélange de solvants organiques, un liant ou un mélange de liants organiques ou une émulsion, telle une émulsion de bitume ou de goudron.3. Method according to one of claims 1 and 2, characterized in that one uses, as liquid composition, water, a solvent or a mixture of organic solvents, a binder or a mixture of organic binders or an emulsion, such as a bitumen or tar emulsion. 4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que la quantité de composition liquide à incorporer est calculée en fonction de la masse de matériau fraisé, de la courbe granulométrique du matériau fraisé, de l'angularité des grains et de l'énergie de compactage admise.4. Method according to one of claims 1 to 3, characterized in that the amount of liquid composition to be incorporated is calculated as a function of the mass of milled material, the particle size curve of the milled material, the angularity of the grains and of the allowed compaction energy. 5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'il comprend une opération complémentaire de malaxage du matériau fraisé mélangé à la composition liquide.5. Method according to one of claims 1 to 4, characterized in that it comprises an additional operation of kneading the milled material mixed with the liquid composition. 6. Machine pour le fraisage à froid des couches superficielles du revêtement de chaussées utilisée pour la mise en oeuvre du procédé selon la revendication 1, caractérisée en ce qu'elle comporte un dispositif de stockage de la composition liquide, un dispositif pour amener la composition liquide dans la zone de fraisage et un dispositif pour doser la composition liquide incorporée au matériau fraisé.6. Machine for cold milling of the surface layers of the road surface used for implementing the method according to claim 1, characterized in that it comprises a device for storing the liquid composition, a device for bringing the composition liquid in the milling zone and a device for metering the liquid composition incorporated into the milled material. 7. Machine selon la revendication 6, caractérisée en ce que le dispositif de dosage de la composition liquide est une pompe doseuse, asservie à la vitesse d'avancement de la machine.7. Machine according to claim 6, characterized in that the device for dosing the composition liquid is a metering pump, controlled by the speed of advance of the machine. 8. Utilisation de matériau fraisé obtenu au moyen du procédé selon l'une des revendications 1 à 5 pour la préparation de couches de fondation, de couches de réglage ou de couches d'usure de chaussées.8. Use of milled material obtained by the method according to one of claims 1 to 5 for the preparation of foundation layers, adjustment layers or wear layers of pavements.
EP85810547A 1984-11-20 1985-11-18 Method for the cold milling of surface layers of roadway coverings Expired - Lifetime EP0182748B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810547T ATE50012T1 (en) 1984-11-20 1985-11-18 PROCESS FOR COLD MILLING OF ROAD SURFACE COATINGS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5541/84A CH661953A5 (en) 1984-11-20 1984-11-20 METHOD FOR PREPARING A PAVEMENT COATING MATERIAL.
CH5541/84 1984-11-20

Publications (3)

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EP0182748A2 true EP0182748A2 (en) 1986-05-28
EP0182748A3 EP0182748A3 (en) 1987-04-15
EP0182748B1 EP0182748B1 (en) 1990-01-31

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AT (1) ATE50012T1 (en)
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DE (1) DE3575752D1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2606801A1 (en) * 1986-11-18 1988-05-20 Colas Sa PROCESS FOR COLD REGENERATION OF THE UPPER LAYERS OF PAVEMENTS AND BINDERS FOR THE IMPLEMENTATION OF THIS PROCESS
FR2609653A1 (en) * 1987-01-19 1988-07-22 Nord Recyclage Materiaux Process for recycling bituminous waste
EP0378973A1 (en) * 1989-01-13 1990-07-25 TODINI COSTRUZIONI GENERALI S.p.A. Self-propelled multipart machinery for preparing in-situ and spreading out cold bituminous or cementitious mix
WO1991002846A1 (en) * 1989-08-15 1991-03-07 Astec Industries, Inc. Asphalt pavement recycling apparatus
EP0597176A1 (en) * 1992-11-08 1994-05-18 WIRTGEN GmbH Process and apparatus for renovating damaged roadways
RU2447035C1 (en) * 2010-10-20 2012-04-10 Сергей Константинович Илиополов Dense organomineral mixture
US20150107927A1 (en) * 2013-10-21 2015-04-23 Hyundai Motor Company Active hood apparatus for vehicle
FR3031991A1 (en) * 2015-01-28 2016-07-29 Colas Sa METHOD FOR PLACING DUST-ABUTMENT LANDING USING A MOBILE PLANER
RU2666949C1 (en) * 2017-11-14 2018-09-13 Олег Александрович Горбунов Pavement layer method for transport infrastructure
RU2803759C1 (en) * 2022-07-11 2023-09-19 Олег Александрович Горбунов Technogenic soil for construction of non-rigid road pavement layers for transport infrastructure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2714547C1 (en) * 2018-12-11 2020-02-18 Андрей Викторович Кочетков Method for construction of road pavement and construction of road pavement

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Publication number Priority date Publication date Assignee Title
FR2484492A1 (en) * 1980-06-17 1981-12-18 Lefebvre Sa Entreprise Jean Regenerator surfacer for old bituminous carriageway - has automatic binder regenerator additive dosage by linkage to surfacer vehicle speed
US4373961A (en) * 1981-10-13 1983-02-15 Penelizer Corporation Process and composition for use in recycling of old asphalt pavements
FR2520400A1 (en) * 1982-01-27 1983-07-29 Colas Sa Highway metalling method for flexible courses - has separate aggregate and binder addition points in mixer for re-grading

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Publication number Priority date Publication date Assignee Title
FR2484492A1 (en) * 1980-06-17 1981-12-18 Lefebvre Sa Entreprise Jean Regenerator surfacer for old bituminous carriageway - has automatic binder regenerator additive dosage by linkage to surfacer vehicle speed
US4373961A (en) * 1981-10-13 1983-02-15 Penelizer Corporation Process and composition for use in recycling of old asphalt pavements
FR2520400A1 (en) * 1982-01-27 1983-07-29 Colas Sa Highway metalling method for flexible courses - has separate aggregate and binder addition points in mixer for re-grading

Non-Patent Citations (1)

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Title
CIVIL ENGINEERING, March 1981, pages 34-35, Londres, GB; V. SERVAS: "Cold mix recycling" *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2606801A1 (en) * 1986-11-18 1988-05-20 Colas Sa PROCESS FOR COLD REGENERATION OF THE UPPER LAYERS OF PAVEMENTS AND BINDERS FOR THE IMPLEMENTATION OF THIS PROCESS
EP0274920A1 (en) * 1986-11-18 1988-07-20 C O L A S Société Anonyme Method of cold-regenerating the surface layers of roadways
FR2609653A1 (en) * 1987-01-19 1988-07-22 Nord Recyclage Materiaux Process for recycling bituminous waste
EP0378973A1 (en) * 1989-01-13 1990-07-25 TODINI COSTRUZIONI GENERALI S.p.A. Self-propelled multipart machinery for preparing in-situ and spreading out cold bituminous or cementitious mix
WO1991002846A1 (en) * 1989-08-15 1991-03-07 Astec Industries, Inc. Asphalt pavement recycling apparatus
EP0597176A1 (en) * 1992-11-08 1994-05-18 WIRTGEN GmbH Process and apparatus for renovating damaged roadways
US5741085A (en) * 1992-11-08 1998-04-21 Wirtgen; Reinhard Process and apparatus for the repair of damaged roads
RU2447035C1 (en) * 2010-10-20 2012-04-10 Сергей Константинович Илиополов Dense organomineral mixture
US20150107927A1 (en) * 2013-10-21 2015-04-23 Hyundai Motor Company Active hood apparatus for vehicle
US9340179B2 (en) * 2013-10-21 2016-05-17 Hyundai Motor Company Active hood apparatus for vehicle
FR3031991A1 (en) * 2015-01-28 2016-07-29 Colas Sa METHOD FOR PLACING DUST-ABUTMENT LANDING USING A MOBILE PLANER
WO2016120545A1 (en) 2015-01-28 2016-08-04 Colas Mobile planing machine and planing method for roadways with reduction in dust by a mobile planing machine
RU2666949C1 (en) * 2017-11-14 2018-09-13 Олег Александрович Горбунов Pavement layer method for transport infrastructure
RU2803759C1 (en) * 2022-07-11 2023-09-19 Олег Александрович Горбунов Technogenic soil for construction of non-rigid road pavement layers for transport infrastructure
RU2820381C1 (en) * 2023-11-21 2024-06-03 Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный лесотехнический университет" Fibre-bitumen-cement-soil mixture

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Publication number Publication date
DE3575752D1 (en) 1990-03-08
ATE50012T1 (en) 1990-02-15
EP0182748A3 (en) 1987-04-15
EP0182748B1 (en) 1990-01-31
CH661953A5 (en) 1987-08-31

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