WO2021119857A1 - Dispositif pour la réparation de fissures dans les revêtements d'asphalte au moyen de l'utilisation de micro-ondes qui augmente la température de l'asphalte depuis la surface, ce qui produit l'auto-réparation du matériau avec une intervention minimale - Google Patents

Dispositif pour la réparation de fissures dans les revêtements d'asphalte au moyen de l'utilisation de micro-ondes qui augmente la température de l'asphalte depuis la surface, ce qui produit l'auto-réparation du matériau avec une intervention minimale Download PDF

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Publication number
WO2021119857A1
WO2021119857A1 PCT/CL2019/050146 CL2019050146W WO2021119857A1 WO 2021119857 A1 WO2021119857 A1 WO 2021119857A1 CL 2019050146 W CL2019050146 W CL 2019050146W WO 2021119857 A1 WO2021119857 A1 WO 2021119857A1
Authority
WO
WIPO (PCT)
Prior art keywords
asphalt
temperature
microwaves
control unit
microwave generators
Prior art date
Application number
PCT/CL2019/050146
Other languages
English (en)
Spanish (es)
Inventor
Alvaro Andres GONZALEZ VACCAREZZA
Francisco RIOSECO PALMA
Original Assignee
Pontificia Universidad Católica De Chile
Linktech Spa
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 Pontificia Universidad Católica De Chile, Linktech Spa filed Critical Pontificia Universidad Católica De Chile
Priority to PCT/CL2019/050146 priority Critical patent/WO2021119857A1/fr
Publication of WO2021119857A1 publication Critical patent/WO2021119857A1/fr
Priority to CL2022001683A priority patent/CL2022001683A1/es

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/08—Apparatus for transporting and heating or melting asphalt, bitumen, tar, or the like
    • 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
    • E01C23/03—Arrangements for curing paving; Devices for applying curing means; Devices for laying prefabricated underlay, e.g. sheets, membranes; Protecting paving under construction or while curing, e.g. use of tents
    • 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
    • E01C23/14—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces for heating or drying foundation, paving, or materials thereon, e.g. paint
    • 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
    • E01C7/02—Coherent pavings made in situ made of road-metal without binders
    • E01C7/06—Coherent pavings made in situ made of road-metal without binders by melting, burning, or vitrifying road-metal in situ

Definitions

  • the present invention is developed in the field of asphalt repair, specifically it refers to a device for the repair of cracks in asphalt pavements through the use of microwaves that increases the temperature of the asphalt from the surface, which produces the auto repair of the material with minimal intervention.
  • Asphalt is the most used material in the construction of pavements. It has a low cost relative to other materials and delivers a high standard surface to users. Pavements deteriorate over time due to environmental effects and traffic loads and their timely maintenance is necessary. In the case of asphalt pavements, the most important deterioration is the cracking that begins to manifest gradually. Lack of proper maintenance on a cracked asphalt pavement transforms into the appearance of potholes in a short time.
  • maintenance and / or reconstruction strategies or techniques are used with the aim of preserve or recover the deterioration suffered by a pavement.
  • Said strategies include techniques that make it possible to improve specific and superficial defects, so that the functional and structural properties of the pavement are maintained within acceptable ranges so that they can be used by users at an acceptable level of service.
  • asphalt pavements are maintained by applying surface treatments that aim to delay aging and protect the rolling surface. To carry out these treatments, it is necessary to introduce specialized machinery in the field and the use of materials on the pavement surface. If the deterioration is more advanced, an alternative is to build a layer of asphalt concrete over the deteriorated pavement, commonly referred to as 'resurfacing'. Another alternative is the demolition and replacement of the asphalt layers. In both cases, the intervention of the pavement means the introduction of specialized machinery on the ground, with the consumption of virgin materials and impact on vehicular traffic.
  • an apparatus that seals and repairs cracks in asphalt pavements through the use of microwaves, comprising a device to deposit and make water penetrate into the repair zone in order to improve the penetration of microwaves in this area, where the device has a microwave generator with a wave guide pointing to the surface of the asphalt that allows the microwaves to be applied to heat the asphalt.
  • This solution seeks to solve the problem of dehydration of asphalt when applying microwaves for the repair of asphalt pavement by providing a method and an apparatus that allows to increase the humidity of the pavement before the application of the microwaves on the surface.
  • the disclosed solution aims to apply heat to the pavement surface, soften the asphalt and reduce wear on degradation tools used to work the surface.
  • a problem with this solution is that the arrangement of the microwave generator does not ensure a uniform temperature increase across the pavement, being able to generate temperature gradients due to localized areas with a higher temperature increase than others.
  • CN2670427 discloses an apparatus that seals and repairs cracks through the application of microwaves, has an array of magnetrons isolated from each other, being connected to a unit that comprises a guide transition of wave pointing directly at the asphalt surface. In addition, it includes a temperature sensor that controls the operation of the magnetrons when the asphalt reaches a certain temperature. This solution seeks to solve the problem of regulating the temperature rise in order to prevent the asphalt from burning or suffering further deterioration during the process. heating.
  • a problem with this solution is that the configuration of the waveguides used points directly to the surface, so it does not ensure a uniform temperature increase since the wave pattern that reaches the surface of the asphalt is not homogeneous, thus that produces a differentiated heating with areas with temperature peaks.
  • CN201024374 discloses an asphalt heating device with microwave for road maintenance that has microwave generators independent of each other, with a temperature control system that turns off the generators microwave when the asphalt reaches a certain temperature, where the generators are connected to a tray that guides the microwaves to the asphalt surface.
  • a problem with this solution is that the tray that guides the microwaves to the surface does not ensure that the wave pattern generated is uniform, so that a differentiated heating is generated on the asphalt surface, which makes it difficult to maintain the pavement when Generate a temperature gradient in the material, where said gradient can damage the asphalt, potentially burning or weakening it due to inadequate temperature control.
  • None of the above techniques and documents disclose an apparatus for repairing asphalt pavements through microwaves that comprises a resonance box whose geometry maximizes the chaos of the waves and guarantees the uniformity of the wave pattern that reaches the pavement surface, which together with a water spray system allows better penetration of microwaves and a profile of temperature at depth is as uniform as possible, and therefore, a homogeneous viscosity loss of the asphalt that seals and repairs cracks in the material with minimal surface intervention.
  • This device allows to increase the useful life of asphalt pavements by closing its cracks and recovering its structural capacity, it reduces the costs of repairing the pavement compared to traditional maintenance techniques since it does not require additional materials for the repair, and does not use specialized machinery for construction interventions for maintenance (application of surface treatments, demolition, construction of structural layers of pavement, among others).
  • the present invention refers to an apparatus that seals and repairs cracks in asphalt pavements through the use of microwaves, the main objective of the invention being an increase in temperature so as to produce self-repair of the asphalt with minimal surface intervention.
  • Another objective of the invention is to provide an apparatus that seals and repairs cracks in asphalt pavements through the use of microwaves, which generates a uniform pattern of microwaves directed towards the surface of the pavement.
  • Still another objective of the invention is to provide an apparatus that seals and repairs cracks in asphalt pavements through the use of microwaves, which generates an asphalt depth temperature profile that is as uniform as possible.
  • the present invention consists of a mobile device that has a microwave generator, preferably being an array of magnetrons, which emits microwaves which are directed towards the surface of the asphalt by means of wave guides. Each of these magnetrons are isolated from the others so that the waves do not interfere with each other.
  • a microwave generator preferably being an array of magnetrons, which emits microwaves which are directed towards the surface of the asphalt by means of wave guides.
  • Each of these magnetrons are isolated from the others so that the waves do not interfere with each other.
  • the waves arrive at an independent resonance box, which includes a wave diffuser and geometric characteristics that maximize the chaos of the waves, guaranteeing the uniformity with which they reach the pavement and increase its temperature.
  • the resonance box at its end close to the surface of the pavement there is a metallic mesh that increases the safety and efficiency of the heating process since it reduces microwave leaks.
  • the device comprises a motor and sensors that allow the speed of advance of the device to be regulated automatically and guarantee that the temperature increase is as required. These sensors work in conjunction with each of the magnetrons in such a way that they turn off when the required temperature of the asphalt in any of these has already been reached, which increases efficiency and prevents the pavement from being damaged by an excessive increase in temperature.
  • the apparatus also includes a water spray system that allows the penetration of microwaves into the asphalt to be more uniform.
  • the apparatus also comprises a refrigeration system that allows the operating temperature of the system to be controlled.
  • Figure 1 shows a diagram of the apparatus that seals and repairs cracks in asphalt pavements through the use of microwaves.
  • Figure 2 shows a diagram of the general operation of the apparatus.
  • Figure 3 shows an isometric view of a resonance box according to a preferred embodiment of the invention.
  • Figure 4 shows a diagram of the resulting wave pattern without using a wave diffuser in the resonance box.
  • Figure 5 shows a schematic of the resulting wave pattern when using a wave diffuser in the soundboard.
  • the present invention refers to an apparatus (1) that seals and repairs cracks or fissures (5) in asphalt pavements (3) through the use of microwaves (2), the main objective of the invention being an increase in temperature so self-repair of the asphalt (3) occurs.
  • Figure 1 shows a diagram of the general operation of the apparatus (1). Asphalt pavements (3) are commonly built on a granular layer (4) of the soil. Over time the asphalt (3) deteriorates with traffic and weather. Its most important deterioration is cracking (5).
  • the device (1) is located on the asphalt (3) with cracks or fissures (5), which is later activated to emit microwaves (2), moving on the pavement surface, causing the asphalt temperature to increase (3 ) from the surface by microwave heating (2) causing the asphalt to soften or temporarily decrease its viscosity and produce a closure or sealing (6) of the cracks or fissures (5).
  • the apparatus (1) comprises a support structure (7) on which the components of the apparatus (1) and a translation mechanism (8) such as wheels or track wheels are installed.
  • the middle or rear part of the support structure (7) comprises a plurality of microwave generators (9), which emit microwaves, which are directed towards the surface of the asphalt (3) by means of wave guides (10).
  • each microwave generator (9) comprises a wave guide (10), and a resonance box (11), which in turn has a wave diffuser (111) installed inside, which together with the geometric characteristics of the resonance box (11) maximize the chaos of the waves making the wave pattern that reaches the asphalt (3) be uniform, increase the temperature of the asphalt (3) and produce a homogeneous softening of the asphalt (3).
  • a wear part (12) is assembled that is dragged on the pavement surface, avoiding the loss of energy and confines the microwaves within it, significantly increasing the safety and efficiency of the heating process by reducing the leakage of microwaves to the environment, enhancing the reflection of microwaves (12) in the resonance boxes (11).
  • the wear part (12) is a metal mesh.
  • FIG. 1 shows a preferred embodiment of a resonance box (11) with a rectangular geometry that ensures the dispersion of the waves along the entire heating surface of the pavement.
  • a wave diffuser (111) installed inside the resonance box (11) which consists of an “L” -shaped profile that is positioned at 45 ° against the flow of the microwaves (2), where the external edge of the profile points directly upwards, where said arrangement allows the emitted microwaves (2) to bounce repeatedly in the resonance box (11) before impacting the pavement avoiding patterns or concentrated heat sources and heating the asphalt (3) evenly, avoiding concentrations of temperature that can damage the asphalt (3) and affect the self-repair process.
  • Figure 4 schematically shows the path of the microwaves (2) without a wave diffuser (111)
  • Figure 5 schematically shows the path of the microwaves (2) with a wave diffuser (111) , where said diffuser favors the reflection of said waves, which maximizes chaos and in this way the uniformity with which they reach the asphalt (3) is guaranteed, increasing the uniformity of the temperature increase.
  • the apparatus (1) also comprises a motor (13) installed in the front part of the support structure (7) and that drives the translation mechanism (8); and sensors (14a, 14b) that measure the temperature of the asphalt (3).
  • Said motor (13) and sensors (14a, 14b) are connected to a speed control unit (14), located on the front part of the support structure (7), which allows to automatically regulate the advance speed of the device and ensure that the temperature rise in the asphalt is adequate.
  • the speed control unit (14) consists of a closed circuit, which determines the advance speed of the device (1) in order to make the process as fast as possible while guaranteeing an optimal temperature in the pavement surface so that self-repair is achieved.
  • the apparatus (1) comprises at least one front sensor (14a) located in front of the resonance box (11) and at least one rear sensor (14b) located behind the plurality of microwave generators (9) .
  • said sensors (14a, 14b) are infrared, which allow the measurement of temperature on a surface without contact. This characteristic of infrared temperature sensors allows high precision temperature measurements for wide temperature ranges.
  • Said sensors (14a, 14b) work interconnected with each other in order to carry out optimal programming, through the speed control unit (14) and the general control unit (15), of the speed of the machine and define when it is necessary to turn the microwave generators on or off (9).
  • the general control unit (14) receives the information from the sensors (14a, 14b), weighing the temperature values obtained from all the sensors and will determine the optimum speed of the apparatus (2) so that it operates at the highest possible speed, but ensuring that the asphalt temperature is adequate.
  • Laboratory asphalt repair occurs between 30 ° C and 70 ° C.
  • the general control unit (15) will proceed to turn off at least one microwave generator (9). If a sensor measures a temperature lower than the minimum asphalt repair temperature (3), it will proceed to turn on at least one microwave generator (9) that is off.
  • the apparatus (1) also comprises a water sprinkler system (16) installed on the support structure (7) between the motor (13) and the resonance boxes (11) and connected to the general control unit (15 ).
  • the Microwave application has good penetration, it can generate a temperature gradient in the asphalt (3) that decreases as a function of depth.
  • the water spray system (16) injects water into the surface of the asphalt (3) penetrating it, which increases the humidity of the pavement, where the water, when excited by the microwaves (2), causes the increase in temperature in the asphalt (3) is controlled and more uniform throughout the depth of the asphalt (3), decreasing the temperature difference between the surface and the deepest section of the asphalt (3).
  • the apparatus (1) also comprises a refrigeration system (17), installed on the microwave generators (9) that allows controlling the operating temperature of the apparatus (1).
  • the cooling liquid in the cooling system (17) is water.
  • Said cooling system (17) consists of a radiator and a pressure pump that circulates the refrigerant through the microwave generators (9). In addition, it has a safety system, which cuts the power of the magnetrons if they exceed their operating temperature.
  • the general control unit (15) is in charge of maintaining the operation of the apparatus (1), controlling the switching on and off of the magnetrons, capturing measurement data from sensors (14a, 14b) and managing the water spray system (16 ) and the cooling system (17).
  • the plurality of microwave generators (9) are an array of magnetrons comprising from 9 magnetrons arranged in a 3x3 magnetron array, up to 375 magnetrons arranged in a 25x15 magnetron array. Magnetrons of different powers are used, preferably chosen within the range between 1000 W to 3000 W to make the operation more efficient. apparatus (1).
  • magnetrons of different frequencies can be used, preferably between 2.45 GHz to 0.915 GHz.
  • the magnetron array can comprise the same power, the same frequency or a combination of magnetrons with different power or frequencies.
  • the apparatus (1) comprises a housing (18) that houses all the microwave generators (9) of the apparatus.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Repair (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Road Paving Structures (AREA)

Abstract

L'invention concerne un appareil scellant et réparant des fissures dans des revêtements d'asphalte au moyen de l'utilisation de micro-ondes qui permet d'augmenter la température de l'asphalte de manière uniforme de sorte qu'une autoréparation de l'asphalte se produit avec une intervention minimale, ledit appareil comprenant une structure de support sur laquelle sont installés les éléments de l'appareil et un mécanisme de translation, une pluralité de générateurs de micro-ondes; des guides d'ondes qui dirigent les micro-ondes vers la surface; une pluralité de caisses de résonance installées sous les générateurs de micro-ondes qui comprennent un diffuseur d'ondes dans leur intérieur favorisant la réflexion des ondes; une pièce d'usure entre les caisses de résonance et la surface qui confine les micro-ondes dans ladite pièce; un moteur qui propulse le mécanisme de translation; au moins un capteur avant et au moins capteur arrière qui mesurent la température de l'asphalte; un système de pulvérisation d'eau qui injecte de l'eau sur la surface et augmente l'humidité; un système de réfrigération qui régule la température de fonctionnement; une unité de commande de la vitesse qui est reliée au moteur et aux capteurs; une unité de commande générale qui est connectée aux capteurs, aux générateurs de micro-ondes, au système de pulvérisation d'eau et de réfrigération, et se charge de maintenir le fonctionnement de l'appareil, ladite unité de commande de vitesse et ladite unité de commande générale recevant les informations des capteurs pour réguler la vitesse et définir l'allumage et l'extinction des générateurs de micro-ondes.
PCT/CL2019/050146 2019-12-19 2019-12-19 Dispositif pour la réparation de fissures dans les revêtements d'asphalte au moyen de l'utilisation de micro-ondes qui augmente la température de l'asphalte depuis la surface, ce qui produit l'auto-réparation du matériau avec une intervention minimale WO2021119857A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CL2019/050146 WO2021119857A1 (fr) 2019-12-19 2019-12-19 Dispositif pour la réparation de fissures dans les revêtements d'asphalte au moyen de l'utilisation de micro-ondes qui augmente la température de l'asphalte depuis la surface, ce qui produit l'auto-réparation du matériau avec une intervention minimale
CL2022001683A CL2022001683A1 (es) 2019-12-19 2022-06-17 Dispositivo para la reparación de grietas en los pavimentos asfálticos

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CL2019/050146 WO2021119857A1 (fr) 2019-12-19 2019-12-19 Dispositif pour la réparation de fissures dans les revêtements d'asphalte au moyen de l'utilisation de micro-ondes qui augmente la température de l'asphalte depuis la surface, ce qui produit l'auto-réparation du matériau avec une intervention minimale

Publications (1)

Publication Number Publication Date
WO2021119857A1 true WO2021119857A1 (fr) 2021-06-24

Family

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Application Number Title Priority Date Filing Date
PCT/CL2019/050146 WO2021119857A1 (fr) 2019-12-19 2019-12-19 Dispositif pour la réparation de fissures dans les revêtements d'asphalte au moyen de l'utilisation de micro-ondes qui augmente la température de l'asphalte depuis la surface, ce qui produit l'auto-réparation du matériau avec une intervention minimale

Country Status (2)

Country Link
CL (1) CL2022001683A1 (fr)
WO (1) WO2021119857A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2670427Y (zh) * 2002-11-12 2005-01-12 广东美的集团股份有限公司 微波沥青路面加热器
US20060198699A1 (en) * 2005-03-01 2006-09-07 Hall David R Apparatus and Method for Heating a Paved Surface with Microwaves
US20130223931A1 (en) * 2009-06-18 2013-08-29 Microwave Utilities, Inc. Microwave asphalt surface treatment system
CN106192712A (zh) * 2016-07-22 2016-12-07 西安电子科技大学 基于电磁超材料的沥青路面微波就地加热方法
WO2019193493A1 (fr) * 2018-04-04 2019-10-10 FUTTEC a.s. Dispositif, en particulier pour le chauffage d'asphalte et de mélanges similaires et de réparations de surfaces d'asphalte

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2670427Y (zh) * 2002-11-12 2005-01-12 广东美的集团股份有限公司 微波沥青路面加热器
US20060198699A1 (en) * 2005-03-01 2006-09-07 Hall David R Apparatus and Method for Heating a Paved Surface with Microwaves
US20130223931A1 (en) * 2009-06-18 2013-08-29 Microwave Utilities, Inc. Microwave asphalt surface treatment system
CN106192712A (zh) * 2016-07-22 2016-12-07 西安电子科技大学 基于电磁超材料的沥青路面微波就地加热方法
WO2019193493A1 (fr) * 2018-04-04 2019-10-10 FUTTEC a.s. Dispositif, en particulier pour le chauffage d'asphalte et de mélanges similaires et de réparations de surfaces d'asphalte

Also Published As

Publication number Publication date
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