• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a reinforcing grid (10) for a bituminous coating. It consists of at least one flexible strip comprising crossed fibers, comprising a first series of longitudinal fibers (11) parallel to each other and a second series of transverse fibers (12), also parallel to each other and whose direction intersects substantially perpendicularly. the direction of said longitudinal fibers (12). To increase the resistance to deformation of the coatings, the invention proposes to complete the rectangular or square grid mentioned above, by a mesh of oblique fibers (14) which are arranged so as to cut the first series of longitudinal fibers ( 11) and the second series of transverse fibers (12) at an angle which may preferably be between 10 and 80 °. All of the fibers may be deposited and bonded to the surface of a geotextile web (13) of the nonwoven type.
    公开号:CH710791A2
    申请号:CH00269/15
    申请日:2015-02-27
    公开日:2016-08-31
    发明作者:Ducrest David
    申请人:Ducrest David；Dario Guccione；
    IPC主号:
    专利说明:

    The present invention relates to a reinforcing grid for a bituminous coating consisting of at least one flexible strip comprising cross-fibers, comprising a first series of longitudinal fibers parallel to each other and a second series of transverse fibers, parallel to each other, the direction substantially perpendicularly intersects the direction of said longitudinal fibers.
    Technical area
    The invention relates to the field of road construction and in particular the establishment of a bituminous coating on a road, in particular on a section with curvatures and / or bifurcations, that is to say areas where the stresses applied to the road surface are large and in varying directions due to changes in direction imposed on the vehicles.
    Prior art
    For road construction is usually carried out in the following manner: in a first step is carried out a base, called foundation layer, consisting of various materials commonly used in the field of road construction. Then, several layers of bituminous mix are preferably placed over the foundation layer. A grid of fiberglass or carbon fiber or the like is applied between two layers of bituminous mix so that the top layer of bituminous mix applied hot over the foundation layer and the fiber grid , drown it in the bitumen.
    The grid, in the form of longitudinal strips is currently composed of a grid of fibers consisting of several rows parallel to each other longitudinally disposed fibers and several rows parallel to each other of fibers arranged transversely to said longitudinally arranged fibers, namely at 90 ° of the previous ones. A square or rectangular mesh is thus obtained, the function of which is to increase the resistance of the pavement subjected to climatic and mechanical constraints, the forces exerted by the wheels of the vehicles traveling by road. The purpose of this reinforcement grid is essentially to protect the coating against cracking.
    It has been found that this resistance is relatively good when the vehicles travel substantially in the direction of the fibers, namely in the direction of the longitudinal strips or in a transverse direction, but became more random when the vehicles travel in angularly offset directions. relative to said longitudinal and transverse directions, which is particularly the case in turns or crossing sectors of different road sections. In these places, cracks and wrinkles in the pavement are quickly observed, which involves civil engineering works to repair the traffic lanes.
    Presentation of the invention
    The present invention proposes to overcome the aforementioned drawbacks by proposing to strengthen the mechanical strength of the fiber gratings in order to enhance their efficiency, especially in busy areas and in particular in bends and change of direction zones of vehicles, such as junctions of road sections, bifurcations, where vehicle wheels generate lateral forces due to kinetic energy, relative to the general direction of vehicles.
    This object is achieved by the grid according to the invention as defined by the preamble and characterized in that it further comprises at least one complementary oblique fiber network with respect to said longitudinal fibers and said transverse fibers, forming a an angle substantially between 10 and 80 ° with respect to said longitudinal fibers and an angle substantially between 80 ° and 10 ° relative to said transverse fibers.
    Preferably, said at least one first series of longitudinal fibers parallel to each other and said at least one second series of transverse fibers parallel to each other intersect substantially perpendicularly and said oblique fiber network comprises at least one set parallel fibers between them which make an angle approximately equal to 45 ° with respect to the direction of said longitudinal fibers and said transverse fibers.
    According to an advantageous mode of production, said longitudinal fibers, said transverse fibers and said oblique fibers are mechanically connected to each other.
    According to a first embodiment, said transverse fibers and said oblique fibers are bonded together.
    According to a second embodiment, said longitudinal fibers, said transverse fibers and said oblique fibers are welded together.
    According to a third embodiment, one of the sets consisting of said longitudinal fibers, said transverse fibers or said oblique fibers are connected by at least one flexible wire.
    In a particularly advantageous manner, said bonding of said fibers is carried out by means of a substance based on bitumen.
    According to a specific embodiment, said oblique fiber network constitutes a double mesh composed of a first series of oblique fibers and of a second series of oblique fibers, said first series of oblique fibers forming an acute angle inclusive with said second series of oblique fibers.
    According to an advantageous embodiment, the fibers of said at least one first series of longitudinal fibers and the fibers of said at least one second series of transverse fibers, as well as the oblique fibers, complementary to said longitudinal fibers and to said transverse fibers comprise glass fibers, and / or carbon fibers and / or a mixture of glass fibers and carbon fibers and / or natural or synthetic fibers having mechanical strength characteristics similar to those of glass fibers and carbon.
    The grid advantageously comprises a base structure consisting of a geotextile web to which is bound all the longitudinal, transverse and oblique fibers, by mechanical means.
    According to an advantageous mode of production, the connection between the geotextile web and said set of fibers is achieved by means of a bituminous binder, such as for example a bituminous product.
    The present invention and its advantages will be better understood on reading the detailed description of various preferred embodiments of the reinforcing grid according to the invention, with reference to the accompanying drawings given for information only and not limiting, in which :<tb> fig. 1 <SEP> represents a plan view of a first embodiment of a reinforcing grid according to the invention, and<tb> fig. 2 <SEP> represents a plan view of a second embodiment of a reinforcing grid according to the invention.
    [0019] Referring to FIG. 1, the reinforcing grid 10 for bituminous coating consists of at least one flexible strip consisting of a set of crossed fibers, comprising a first series of longitudinal fibers 11 parallel to each other and a second series of transverse fibers 12, also parallel between them and the direction of which substantially perpendicularly intersects the direction of said longitudinal fibers 11. These two series of fibers 11 and 12 form, according to a known embodiment, said flexible strip or, in the most effective embodiment of the invention, these two series of fibers 11 and 12 are deposited on a base structure, consisting for example of a geotextile web 13 made of a material of the nonwoven type, to which they are mechanically bonded, for example by means of a bituminous binder and associated with complementary oblique fibers.
    This type of reinforcement grid is usually used to increase the strength of the road surface, in particular to counter premature cracking of the coating under the effect of tensile stresses imposed by weather conditions and mechanical forces. For this purpose, these grids are embedded in the bituminous coating layer or between several successive layers which constitute the running surface of the road.
    In order to improve the performance of the reinforcing grids by increasing the mechanical strength of the coatings, the present invention proposes to complete the rectangular grid or square mentioned above, by a mesh of oblique fibers 14 which are arranged so as to cut the first series of longitudinal fibers 11 and the second series of transverse fibers 12 at an angle which may preferably be between 10 and 80 °. The oblique fibers could be substantially diagonal and arranged at 45 ° with respect to said longitudinal fibers 11 and said transverse fibers 12. They are advantageously parallel to each other. They are preferably made of glass fibers or carbon fibers, but can be made from natural or synthetic fibers, knowing that the basic requirement is that they must have a mechanical strength at least close to that of glass fibers. or carbon. The fibers preferably consist of a set of strands assembled in bundles or twisted. They may be welded to longitudinal fibers 11 and / or transverse fibers 12 or connected by at least one flexible yarn, or glued for example with a bituminous binder or the like. In the case where all the fibers are placed on a veil of the geotextile type 13, the oblique fibers 14 are preferably also mechanically connected to the other fibers and to the surface of said veil 13 with bitumen.
    When a vehicle is moving in a curve, the stresses exerted by the tires of the wheels are absorbed by the road surface, the forces tending to crack and deform this coating being counteracted by the different groups or sets of fibers 11, 12 and 14. Cracking and deformation are due in part to the transverse results exerted on the fibers, but these results will be lower when the angles are reduced. The addition of the oblique fibers 14 makes it possible to reduce the transverse results on the network of fibers and, consequently, to better absorb the stresses by reducing the cracking and the deformations in the areas subjected to high stresses, for example in the bends.
    [0023] With reference to FIG. 2, the reinforcing grid 20 for a bituminous coating consists of at least one flexible strip having as previously crossed fibers, a first series of longitudinal fibers 21 parallel to each other and a second series of transverse fibers 22, also parallel between they and whose direction crosses substantially perpendicularly the direction of said longitudinal fibers.
    To increase the resistance to cracking and deformation of the coatings, the reinforcing grid 20 proposes to complete the rectangular grid or square mentioned above, by a double mesh of oblique fibers 24 and 25 which are arranged so to cut the first series of longitudinal fibers 21 and the second series of transverse fibers 22. The oblique fibers 24 are arranged parallel to each other, but cut the first series of longitudinal fibers 22 at a given angle x which may advantageously be between 10 ° and 80 ° and the second series of transverse fibers 22 at a given angle y which can advantageously be between 80 ° and 10 °. Similarly, the oblique fibers 25 are arranged parallel to each other, but cut the first series of longitudinal fibers 21 at a given angle z which may advantageously be between 80 ° and 10 ° and the second series of transverse fibers 22 at angles which may preferably be between 10 ° and 80 °.
    The oblique fibers are, as previously constituted by bundles or strands of fibers, preferably glass, carbon or the like and the fiber assemblies can be mechanically connected, welded or glued together to increase the resistance to tearing or tearing. the disintegration of the whole structure of the reinforcement grid. They can be mechanically connected, welded or glued on a geotextile web 23, for example with a bituminous product. This solution is advantageous by facilitating the laying of the grid of the upper bituminous layer of the road surface and facilitating the connection with the upper layer.
    The grid arises between several layers of bituminous mix or a concrete layer and a bituminous mix layer which comprises the running surface and it is integrally incorporated in this coating, embedded in a bituminous emulsion or a bituminous membrane. .
    The longitudinal fibers 11, 21 or transverse 12, 22 or oblique 14, 24 may be adapted according to the results that are desired depending on the road traffic concerned. The weight of the grid may for example vary between 100 and 600g / m2, so as to adapt to either light traffic or heavy traffic. Similarly, the density of the fiber mesh may be greater or less for the same reasons.
    The invention is not limited to the use of two sets of fibers constituting the base of the structure, nor to the use of one or two groups of oblique fibers superimposed on the longitudinal and transverse fibers. Their number as well as their section can be varied according to the applications. The spacing of the longitudinal fibers as well as the spacing of the transverse fibers can be varied. The section of the fiber groups and their composition are adaptable according to the specific needs. The angles of section of the longitudinal and transverse fibers as well as the angles of the oblique fibers with respect to the longitudinal and transverse fibers are variable.
    权利要求:
    Claims (11)
    [1]
    1. reinforcing grid (10, 20) for a bituminous coating, consisting of at least one flexible strip comprising crossed fibers, comprising at least a first series of longitudinal fibers (11, 21) parallel to each other and at least one second series of transverse fibers (12, 22), parallel to one another, the direction of which intersects the direction of said longitudinal fibers at a given angle, characterized in that it further comprises at least one oblique fiber network (14, 24, 25 ) complementary to said longitudinal fibers (11, 21) and said transverse fibers (12, 22) forming an angle of substantially between 10 and 80 ° with respect to said longitudinal fibers (11, 21) and an angle of substantially between 80 ° and 10 ° with respect to said transverse fibers (12, 22).
    [2]
    2. Grid according to claim 1, characterized in that said at least one first series of longitudinal fibers (11, 21) parallel to each other and said at least one second series of transverse fibers (12, 22) parallel to each other intersect substantially perpendicularly and in that said network of oblique fibers (14, 24, 25) comprises at least one set of parallel fibers between them which make an angle approximately equal to 45 ° with respect to the direction of said longitudinal fibers and said transverse fibers.
    [3]
    3. Grid according to any one of claims 1 or 2, characterized in that said longitudinal fibers (11, 21), said transverse fibers (12, 22), and said oblique fibers (14, 24, 25) are related mechanically between them.
    [4]
    4. Grid according to claim 3, characterized in that said longitudinal fibers (11, 21), said transverse fibers (12, 22) and said oblique fibers (14, 24, 25) are glued together.
    [5]
    5. Grid according to claim 3, characterized in that said longitudinal fibers, said transverse fibers and said oblique fibers are welded together.
    [6]
    6. Grid according to claim 3, characterized in that one of the sets consisting of said longitudinal fibers, said transverse fibers or said oblique fibers are connected by at least one flexible wire.
    [7]
    7. Grid according to claim 4, characterized in that said gluing of said fibers is carried out by means of a bituminous substance.
    [8]
    8. Grid according to claim 1, characterized in that said network of oblique fibers is a double mesh composed of a first series of oblique fibers and a second series of oblique fibers, said first series of oblique fibers forming an angle included acute with said second series of oblique fibers.
    [9]
    9. Grid according to any one of claims 1 to 8, characterized in that the fibers of said at least a first series of longitudinal fibers and the fibers of said at least a second series of transverse fibers, and the oblique fibers, complementary to said longitudinal fibers and said transverse fibers comprise glass fibers, and / or carbon fibers and / or a mixture of glass fibers and carbon fibers and / or natural or synthetic fibers having a similar mechanical strength to that of glass and carbon fibers.
    [10]
    10. Grid according to claim 9, characterized in that it comprises a base structure consisting of a geotextile web to which is bound all the longitudinal, transverse and oblique fibers.
    [11]
    11. Grid according to claim 10, characterized in that the connection between the geotextile web and said set of fibers is achieved by means of a bituminous binder.
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    同族专利:
    公开号 | 公开日
    CH710791B1|2020-01-31|
    WO2016134493A1|2016-09-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    BE560293A|
    US20130156501A1|2011-12-16|2013-06-20|William Scott HEMPHILL|Reinforced fiber mats for use in paved surfaces|
    法律状态:
    2018-06-15| NV| New agent|Representative=s name: ACTOSPHERE SARL, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    CH00269/15A|CH710791B1|2015-02-27|2015-02-27|Reinforcement grid for bituminous road surface.|CH00269/15A| CH710791B1|2015-02-27|2015-02-27|Reinforcement grid for bituminous road surface.|
    PCT/CH2016/000034| WO2016134493A1|2015-02-27|2016-02-26|Reinforcing grid for bituminous or similar road coating, method for installing same and road coating with said reinforcing grid|
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