• 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:
    Process and manufacturing plant for bituminous mixtures tempered with material recovered from bituminous mixtures (mrmb) with the possibility of recycling up to 100% of said material. The process comprises the following steps: a) providing mrmb with a granulometry comprised between 0 and a maximum diameter; b) treat said mrmb to obtain at least two fractions of mrmb (one fine and one coarse); c) submit predetermined quantities of said mrmb fractions to a process of mixing and heating by flow of hot gases so that the heating times of each fraction are adapted to their granulometry and that the temperature of the mixture at the end of the step is comprised between 90º c-120º c; d) knead the mixture obtained in the previous step with a predetermined amount of bituminous emulsion supplied at a temperature comprised between 60ºC and 80º c. The final mixture after step d) will reach a temperature between 90-110º c. The invention also comprises a plant for executing said method. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2560895A1
    申请号:ES201431103
    申请日:2014-07-23
    公开日:2016-02-23
    发明作者:Antonio Angel Ramirez Rodriguez；José Ramón OTERO ABAD；Jacinto Luis GARCÍA SANTIAGO；Rafael Pablo GUILLÉN CARMONA；Patricia DÍAZ MARTÍN
    申请人:Sacyr Construccion SA；
    IPC主号:
    专利说明:

    Process and manufacturing plant for bituminous mixtures tempered with material recovered from bituminous mixtures 5
    FIELD OF THE INVENTION
    This invention relates to a method of manufacturing hardened bituminous mixtures to form the upper layers of road pavements and other
    10 road infrastructure using material recovered from deteriorated and / or aged layers of bituminous mixtures, with the possibility of using a rate of up to 100% of recovered material. The invention also encompasses a manufacturing plant for executing said process.
    BACKGROUND OF THE INVENTION
    In general terms, we can define a bituminous mixture as a combination of bitumen (also called asphalt) and some mineral aggregates in predetermined proportions that determine its physical properties and, eventually, its performance for a
    20 determined use.
    The conservation of road heritage implies planned rehabilitation and conservation operations to maintain its adequate structural durability and functional response. In the most widespread type of pavement, that of bituminous pavements, one of the
    The most common and frequent operations are the milling and removal of damaged and / or aged layers and their replacement (replacement) by new layers using newly manufactured bituminous mixtures.
    The product generated by milling deteriorated and / or aged bituminous mixtures
    30 is usually called "RAP", using the acronym of the Anglo-Saxon denomination of said material (Reclaimed Asphalt Pavement) or MRMB (Material Recovered of Bituminous Mixtures) that will be the term that we will use in future.


    The MRMB is made up of materials of high technical and economic value, so its reuse or recycling is desirable. Hot fabrication procedures are known for bituminous replacement mixtures that can use a certain percentage of MRMB (up to 50% approximately) but
    5 not 100% because the high temperatures reached during the hot manufacturing processes (approximately between 160ºC-180ºC) deteriorate ("burn") the bitumen present in the MRMB, thus damaging its properties.
    Processes for the production of cold bituminous mixtures with emulsion are known
    10 bituminous that allow to use 100% MRMB. However, these mixtures present important drawbacks such as the need for a curing period (which is usually at least a year) and the weakness of their mechanical performance in the first moments after they are put into operation. For these reasons, when these procedures are used, it is essential to add an additional layer of race on top of the layer
    15 where MRMB is being used.
    On the other hand, in the known methods of manufacturing hardened bituminous mixtures such as that described in the patent ES 2 368 980 A1 the use of MRMB is not contemplated.
    20 Consequently, there is currently a large surplus of MRMB that is treated as a waste with the economic and environmental disadvantages that this entails.
    The present invention is aimed at solving that problem. 25
    SUMMARY OF THE INVENTION
    An object of the present invention is to provide methods of manufacturing bituminous mixtures with a high level of mechanical and functional performance that
    30 allow a percentage of MRMB recycling of up to 100%.
    Another objective of the present invention is to provide processes for manufacturing bituminous mixtures that reduce their cost compared to known processes.


    Another objective of the present invention is to provide manufacturing plants for the execution of the aforementioned processes.
    In a first aspect, these and other objectives are achieved with a continuous process of manufacturing bituminous mixtures from Bituminous Mixtures Recovered Material (MRMB) and a bituminous emulsion comprising the following steps:
    a) Provide MRMB of a granulometry smaller than a maximum diameter "D3" determined by the sieves of the mill to be used; B) Treat said MRMB to obtain at least two fractions of MRMB whose maximum sizes are not greater than D1 mm and D2 mm;
    c) Submit predetermined quantities of said fractions of MRMB to a process of mixing and heating by flow of hot gases so that the heating times of each fraction are adapted to their granulometry, being more
    15 short and with lower intensity of exposure for a fraction of smaller size (because it has more amount of binder adhered to the aggregate, to have this greater surface area than the larger aggregate, thus preventing deterioration of the binder by exposure of hot gases) than for a larger one (which has a lower amount of binder and can be exposed more time to hot gases without
    20 deteriorates the binder), and that the temperature of the mixture at the end of the passage is between 90 ° C-120 ° C; d) Knead the mixture obtained in the previous step with a predetermined amount of bituminous emulsion supplied at a temperature comprised between 60 ° C and 80 ° C. The final mixture after step d) will reach a temperature between 90 25 110 ° C.
    Advantageously, the granulometry of the first fraction is between 0mm and 7mm (and more advantageously between 0mm and 5mm) and the granulometry of the second fraction is between 4mm and 30mm (and more advantageously between 5mm and 25mm.
    30 The procedure admits the incorporation of virgin aggregate to the mixture to improve its properties. Also, if desired, to make temperate mixtures with a recovery rate of MRMB less than 100%.


    In cases where 100% of the starting material is MRMB the amount of bituminous emulsion is between 2.5% -3% by weight of the total bituminous mixture, providing a percentage of bitumen much lower than necessary when no recycled materials are used.
    In a second aspect, the aforementioned objectives are achieved with a plant for the manufacture of bituminous mixtures from Bituminous Mixtures Recovered Material (MRMB) and a bituminous emulsion comprising:
    a) a unit of pretreatment of the material coming from old pavements, either by milling or by the demolition of a bituminous pavement, in which the material of more than a maximum diameter D3 is rejected. The fraction comprised approximately between a diameter D2 mm and D3 mm is fed to a shredding mill. The smaller fraction of D2 mm is taken directly to the exit screen along with the product of the shredder mill. This shredding mill separates, with the minimum possible fragmentation of the stone matrix, the fractions joined by the binder, that is, what it really does is to "take off" them. This pretreatment unit can incorporate a magnetic separator that prevents the entry of pikes or remains of metals present in the material to be fed. The product of this stage that is obtained in the exit screen are two or more fractions of MRMB at room temperature.
    b) a first hopper for a first fraction of MRMB with a granulometry whose maximum size is not greater than D1 mm, a second hopper for a second fraction of MRMB with a granulometry whose maximum size is not greater than D2 mm and an emulsion tank bituminous materials provided with dosing devices for the material contained therein;
    c) a drying drum with the delayed burner for heating and mixing of materials configured as a parallel flow drum, in which the material to be heated and the hot gases coming from its combustion chamber circulate in the same direction, and equipped with two material inputs at different distances from its combustion chamber;
    d) a first transport device (eg a conveyor belt) arranged to transport preset amounts of the first MRMB fraction to the inlet of the drying drum furthest from its combustion chamber and a second transport device (e.g. a band) conveyor) ready to transport


    pre-set amounts of the second fraction of MRMB at the entrance of the drying drum closest to the combustion chamber;
    e) a kneader, for kneading the mixture made in the drying drum with a predetermined amount of bituminous emulsion from the bituminous emulsion tank 5 which is arranged so as to receive the mixture made in the drum of gravity by gravity.
    drying
    Advantageously, the drying drum comprises a controlled recirculation system for part of the effluent fumes and is provided with a bag filter for the treatment
    10 of the non-recirculated fumes.
    Advantageously, the mixer comprises a system for measuring its energy consumption which allows estimating the humidity of the final bituminous mixture.
    The plant can also comprise a device for raising the kneaded product to a waiting hopper, in order to adapt the continuous flow of the installation to the discontinuous of the trucks. The lifting device can be, for example, a squeegee elevator. For long waiting times, instead of a hopper, a larger sized silo can be used, heat-insulated and heated in its base.
    The plant may also comprise a third and a fourth hopper for irid aggregate connected to the second conveying device so that it can also transport predetermined amounts of virgin aggregate to the drying drum. The granulometry of the virgin aggregate will be the necessary to obtain the final granulometry of the desired mixture with
    25 the percentages determined in the work formula obtained in the laboratory.
    The third and fourth hoppers can also be used alternatively for a third and a fourth fraction of the MRMB in case they want to use more than two fractions of recycled material in the manufacturing process.
    Other features and advantages of the present invention will be apparent from the following detailed description of illustrative embodiments of its object in relation to the accompanying figures.


    BRIEF DESCRIPTION OF THE DRAWINGS
    Figure 1 is a functional diagram illustrating an embodiment of the process for manufacturing temperate bituminous mixtures object of the invention.
    Figure 2 is a schematic plan view illustrating the main components of the tempering bituminous mixtures manufacturing plant object of the invention.
    DETAILED DESCRIPTION OF THE INVENTION
    10 The continuous manufacturing process of bituminous mixtures tempered with MRMB
    We will describe in detail below the steps of the procedure of the invention
    15 following Figure 1. a) The first step is to provide MRMB of a granulometry smaller than D3 mm, thus rejecting the MRMB of more than this diameter. Preferably, the granulometry will be between 0mm and a D3 value of less than 60mm. b) In the second step the MRMB is treated to obtain at least two fractions f1 and
    20 f2 whose maximum sizes are not greater than D1 mm and D2 mm, which are arranged in stores A1 and A2. Preferably, the value of D1 will be less than 7 mm and the value of D2 will be less than 30mm.
    This treatment can be carried out by means of a first operation of crushing the
    MRMB comprised between D2 and D3 in, for example, a ripping mill and a second screening operation of the shredded material and the remainder of the MRMB (less than D2) to obtain said two fractions f1 and f2 of MRMB. It is important to point out that the heartbreaking mill separates the MRMB with the minimal fragmentation of the stone matrix, that is to say that what it really does is to "take off" the aggregates united by the bitumen.
    30 The treatment of this step can also include the separation of metallic materials present in the MRMB by means of magnetic separators.


    Preferably, the first fraction f1 has a granulometry comprised between 0 and 7mm (and more preferably between 0mm and 5mm) and the second fraction f2 has a granulometry comprised between 4mm and 30mm (and more preferably between 5mm and 25mm).
    At the end of the step, two (or more) fractions of MRMB are obtained at room temperature, with two (or more) clearly differentiated granulometries and in which the humidity has been significantly reduced. In this way, the amount of bitumen present in each fraction of the MRMB can be calculated with greater accuracy and with this information, the working formula of the final bituminous mixture and the amount of bituminous emulsion to be added in the fourth step can be optimized.
    c) In the third step, predetermined quantities of the fractions f1, f2 of MRMB (and in their case other fractions) obtained in the previous step are submitted to a process of mixing and heating by hot gas flow so that the times of heating are smaller for smaller MRMB fractions and that the temperature of the mixture is between 90 ° C-120 ° C at the end of this step c).
    In an embodiment of the method, the execution of this step is carried out by first feeding hoppers T1, T2 destined to the fractions f1, f2 of MRMB provided with dosing devices D1, D2 from the preparations A1 and A2; supplying, in the second place, predetermined quantities of said fractions f1, f2 to transport devices, for example feeding bands B1, B2 that lead them to two differentiated inputs of a TS drying drum where said fractions are mixed and heated differently thus allowing a 100% recycling rate of MRMB for the reasons stated above.
    Thus, in the process of the present invention, the MRMB is heated directly but it is done in such a way that it does not affect the bitumen present therein.
    The heating of the two fractions f1, f2 is carried out by contact with a flow of hot gases ac (avoiding contact with the flame that takes place in the counter-flow drying drums used in bituminous plants such as the one described in the patent ES 2 368 980 A1) and the heating time is different for the two fractions f1 and f2, when entering them at different points of the TS drying drum to accommodate their different granulometry and, therefore, the different quantities of binder (bitumen ) so as not to affect its properties.


    Fraction f2, with the thicker MRMB, is introduced through the entrance closest to the source of hot gases ac (at the beginning of the TS drying drum) as more time is needed to transmit the necessary amount of heat to the coarser fraction. The fraction f1, with the finest aggregate, is introduced through the entrance farthest from the hot gas source ac which is located at an appropriate point of the drying drum TS so that the fraction f1 reaches the required temperature at the exit of the drum of drying TS that is comprised between 90-120ºC.
    In addition to the f1 and f2 fractions of MRMB, this step can include an additional fraction of virgin aggregate to improve the characteristics of the bituminous mixture. Where appropriate, this material would be supplied to the TS drying drum through the feeder band B2 used for fraction f2 of the MRMB. The granulometry of the virgin aggregate will be necessary to obtain the final granulometry of the desired mixture with the percentages determined in the working formula obtained in the laboratory. Alternatively, instead of using virgin aggregate, this step may include a third and a fourth fraction f3 and f4 of the MRMB if more than two fractions of recycled material are to be used in the manufacturing process. Preferably, the granulometries of the third and fourth fraction f3 and f4 will be between D1 mm and D2 mm. Where appropriate, this material would be supplied to the TS drying drum also through the feeder band B2 used for fraction f2 of the MRMB.
    d) In the fourth step, the mixture obtained in the previous step is kneaded with a predetermined amount of bituminous emulsion supplied at a temperature comprised between 60 ° C and 80 ° C.
    The mixture f1 + f2 obtained in the previous step is discharged in an AM bitumen mixer or mixer where it is kneaded together with a predetermined amount of bituminous emulsion eb that is received at 60-80 ° C from a tank T3 equipped with a dosing device D3. In the present process when 100% MRMB is used as starting material, the amount of bituminous emulsion eb is between 2.5-3% by weight.
    The bituminous mixture mb obtained after the fourth step can be supplied directly to a means of transport to take it to its destination or be stored, by means of some lifting device in a hopper or waiting silo, which can be heat-insulated and heated.
    Nº application21 / 08 / 2014F.OEPM21 / 08 / 2014F.Efectiva


    - In a preferred embodiment, it is a parallel flow (equi-current) drum, driven by electric motors and a fuel oil burner (although any other fuel such as gas can be used). Its combustion chamber 6 is arranged in a
    5 position delayed and has two entries or rings in different positions. The one closest to the combustion chamber 6 is intended for the coarser fraction (s) of the MRMB and, where appropriate, the virgin aggregates and the farthest fraction to the finest fraction of the MRMB. The latter must be located at a point on the drying drum 5 as far as possible from the burner (to damage as little as possible the bitumen) but at a point such as to allow said fraction
    10 reach the required temperature at the outlet of the drying drum which is comprised between 90ºC-120ºC.
    Its configuration with delayed flame and its great length allow to increase the residence time of the MRMB fractions to achieve the necessary transfer of
    15 heat but avoiding at the same time the direct contact of the MRMB with the flame. As it is a parallel flow drum, it absorbs the extreme temperature contacts to the materials fed to it. The materials and hot air circulate in the same direction unlike what happens in the drying drums of many bituminous plants and, in particular, that described in ES 2 368 980 A1.
    20 It is provided with frequency variators that allow to modify the speed of rotation.
    It is connected to a bag filter 13 with extractor fan, to reduce harmful emissions and at the same time favor the combustion of the flame.
    25 As it is a parallel flow drum - less thermally efficient than a counter-flow drum - it includes a recirculation system for the effluent fumes. That is, a certain percentage of the exhaust fumes of the drying drum 5 are not sent to the bag filter 13 but are recirculated to the interior of the drying drum 5 by means of
    30 of a system of recirculation ducts and electrovalves.
    The combustion gases can be mixed at the beginning of their cycle: they can be wrapped with a part of recirculated gases and another part of fresh air by means of a tangential fan that creates the necessary turbulence for homogeneous heating (the amount of fresh air


    it can be modulated). With this system of partial recirculation of gases the efficiency of the drum in equi-current or in parallel is improved.
    The combination of the delayed burner (and therefore the absence of direct contact with the
    5 flame) and an adequate control of the temperature by means of the partial recirculation of the fumes, makes the treatment of bitumen present in the MRMB very careful, not damaging it and allowing its reuse.
    The burner of the drying drum 5 is supplied with fuel oil (although it can be used
    10 any other fuel such as gas) by a pump from a tank at about 40 ° C and this is filtered through pass filters.
    - Transport devices 7, 8 from the hoppers 1, 2; 3, 4 to the drying drum 5. The quantities required at each moment of the fine and coarse fractions of MRMB are
    15 deliver, respectively, to transport devices 7, 8 (in the example shown in FIG. 2 are conveyor belts) as well as, where appropriate, the virgin aggregates to the transport device 8 by means of dosing devices (belt feeders with variator of frequency and integrated scale) integrated in the hoppers 1, 2, 3, 4 and said transport devices lead them to the drying drum 5. The device of
    The transport 8 is connected to the inlet of the drying drum 5 closest to the combustion chamber 6 and the transport device 7 is connected to the furthest entrance.
    - Tank 10 of bituminous emulsion.
    25 It is a heated and heat-sealed tank with sufficient capacity to store the bituminous emulsion for the process. It is connected to a pump driven by a frequency inverter and controlled by a control system (PID) that is based on the readings of a flowmeter to supply the bitumen emulsion to the mixer 9.
    30 - Kneader 9. The kneader 9 receives the flow of material out of the drying drum 5 and the bituminous emulsion of the tank 10 at a temperature comprised between 60-80 ° C. The mixer 9 is arranged below the drying drum 5 so that it can receive by gravity the mixture of the MRMB fractions (and, where appropriate, of virgin aggregates).


    the final mixture reaching a temperature comprised between 90-110 ° C. It is therefore an arrangement different from that of plants with temperate bituminous mixtures, such as that described in ES 2 368 980 A1.
    The mixer 9 includes a system for measuring energy consumption to estimate, using appropriate correlation tables, the humidity of the final mixture. This parameter is fundamental because, in order to guarantee an adequate compaction during laying, it is necessary that the humidity of the mixture oscillates between 0.5 and 1%.
    10 The installation provides the possibility of adding water to the mixer to achieve the desired moisture in the final mix.
    - Device 11, 12 of evacuation of the bituminous mixture. The bituminous mixture that comes out of the kneader 9 is taken to a waiting hopper 12 by means of a lifting device such as, for example, a belt lifter.
    eleven.
    Although the present invention has been described in connection with various embodiments, it can be appreciated from the description that various combinations of elements, variations or improvements therein can be made and that they are within the scope of the invention defined in the appended claims.

    权利要求:
    Claims (10)
    [1]
    1. Continuous process for the manufacture of tempered bituminous mixtures from Recovered Material from Bituminous Mixtures (MRMB) and a bituminous emulsion,
    5 characterized in that it comprises the following steps: a) Providing MRMB with a particle size between 0 and D3 mm; b) Treat said MRMB to obtain at least two fractions of MRMB whose
    maximum sizes are not greater than D1 mm and D2 mm; c) Subject predetermined amounts of said MRMB fractions to a
    10 process of mixing and heating by hot gas flow so that the heating times and intensity of exposure of each fraction are adapted to its granulometry, being shorter for a smaller fraction than for a larger one, and that the temperature of the mixture at the end of the step is between 90 ° C-120 ° C;
    D) Knead the mixture obtained in the previous step with a predetermined quantity of bituminous emulsion supplied at a temperature between approximately 60ºC and 80ºC, the final mixture reaching after step d) a temperature between 90-110ºC.
    20 2. Continuous process for the manufacture of tempered bituminous mixtures according to claim 1, characterized in that the rate of recovered material is 100%
    [3]
    3. Continuous process for the manufacture of bituminous mixtures according to any one of the preceding claims, characterized in that in step b) it is obtained
    25 a first fraction of MRMB with a particle size between 0mm and D1mm, and a second fraction of MRMB with a particle size between D1mm and D2mm.
    [4]
    4. Continuous process for the manufacture of tempered bituminous mixtures according to
    Any one of the preceding claims, characterized in that in step b) the maximum size of the first fraction D1 is less than 7mm, preferably less than 5mm.

    a) A unit for the pre-treatment of the material from old pavements in which the material of more than D3 mm is rejected and the fraction between approximately D2 mm and D3 mm is fed to a shredder mill, while the smaller fraction of D2 mm is taken directly to an exit screen together with the product from the shredder mill, the product obtained in the exit screen being two fractions of MRMB at room temperature
    b) a first hopper (1) for a first fraction of MRMB with a granulometry whose maximum size is not greater than D1 mm, a second hopper (2) for a second fraction of MRMB with a granulometry whose maximum size is not greater than D2 mm and a bituminous emulsion tank (10) provided with metering devices for the material contained therein;
    c) a drying drum (5) with delayed burner for heating and mixing materials configured as a parallel flow drum, in which the material to be heated and the hot air from its combustion chamber (6) circulate in the same direction, and equipped with two material inlets at different distances from its combustion chamber (6);
    d) a first transport device (7) arranged to transport predetermined quantities of the first fraction of MRMB to the entrance of the drying drum (5) farthest from its combustion chamber (6) and a second transport device (8) arranged to transport predetermined quantities of the second fraction of MRMB to the inlet of the drying drum (5) closest to the combustion chamber (6);
    e) a kneader (9), to knead the mixture made in the drying drum (5) with a predetermined amount of bituminous emulsion from the bituminous emulsion tank (10), which is arranged so that it receives the mixture produced by gravity in the drying drum (5).
    [12]
    12. Plant for the manufacture of tempered bituminous mixtures according to claim 11, characterized in that the transport devices (7) and (8) are conveyor belts.
    [13]
    13. Plant for the manufacture of warm bituminous mixtures according to claim 11, characterized in that the drying drum (5) comprises a recirculation system for part of the effluent fumes and a filter (13) for the treatment of the non-recirculated fumes.

    [14]
    14. Plant for the manufacture of warm bituminous mixtures according to claim 13, characterized in that the filter (13) for the treatment of non-recirculated fumes is a bag filter.
    [15]
    15. Plant for the manufacture of tempered bituminous mixtures according to any of claims 11-14, characterized in that the mixer (9) comprises a system for measuring its energy consumption that allows estimating the humidity of the final bituminous mixture.
    [16]
    16. Plant for the manufacture of warm bituminous mixtures according to any of claims 11-15, characterized in that the necessary means have been provided for adding water to the kneader (9) to achieve the desired humidity in the final bituminous mixture.
    [17]
    17. Plant for the manufacture of tempered bituminous mixtures according to claim 11, characterized in that it includes respective devices 11, 12 for lifting and storing the final bituminous mixture.
    18. Plant for the manufacture of tempered bituminous mixtures according to any of claims 11-17, characterized in that it also comprises a third and a fourth hoppers (3, 4) connected with the second transport device (8) so that it can also transporting predetermined quantities of the material stored in the third and fourth hoppers (3, 4) to the drying drum (5).
    [19]
    19. Plant for the manufacture of warm bituminous mixtures according to claim 18, characterized in that the third and fourth hoppers (3, 4) are intended to store virgin aggregate.
    20. Plant for the manufacture of tempered bituminous mixtures according to claim 18, characterized in that the third and fourth hoppers (3, 4) are destined to store a third and a fourth fraction f3 and f4 of the MRMB in case they are wanted use more than two fractions of recycled material in the manufacturing process.

    f1
    f2
    A1
    A2
    T1
    T2
    D1D2
    f2 B1
    f1
    B2
    T3
    f1 + f2
    D3
    TS
    eb
    mb
    A.M
    FIG. 1
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    引用文献:
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    US4126397A|1976-12-27|1978-11-21|Mendenhall Robert Lamar|Asphaltic concrete recycle apparatus|
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    法律状态:
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    CA2955110A| CA2955110A1|2014-07-23|2015-04-17|Method and plant for the production of tempered bituminous mixtures with reclaimed asphalt pavement|
    MA040442A| MA40442A|2014-07-23|2015-04-17|Method and plant for the production of hot asphalt mixes with reclaimed asphalt mix material|
    PCT/ES2015/000054| WO2016012635A1|2014-07-23|2015-04-17|Method and plant for the production of hot asphalt mixes with reclaimed asphalt mix material|
    MX2017000924A| MX2017000924A|2014-07-23|2015-04-17|Method and plant for the production of hot asphalt mixes with reclaimed asphalt mix material.|
    EP15824453.3A| EP3173526A4|2014-07-23|2015-04-17|Method and plant for the production of hot asphalt mixes with reclaimed asphalt mix material|
    US15/328,430| US20170211243A1|2014-07-23|2015-04-17|Method and plant for the production of hot asphalt mixes with reclaimed asphalt mix material|
    PE2017000088A| PE20170190A1|2014-07-23|2015-04-17|PROCEDURE AND PLANT FOR THE MANUFACTURE OF TEMPERED BITUMINOUS MIXTURES WITH MATERIAL RECOVERED FROM BITUMINOUS MIXTURES|
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    CONC2017/0000439A| CO2017000439A2|2014-07-23|2017-01-19|Procedure and manufacturing plant for tempered bituminous mixtures with material recovered from bituminous mixtures|
    CL2017000167A| CL2017000167A1|2014-07-23|2017-01-23|Procedure and manufacturing plant for tempered bituminous mixtures with material recovered from bituminous mixtures|
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