WO2022138805A1 - Composition d'asphalte, appareil de fabrication de composition d'asphalte, système de fabrication de composition d'asphalte, mélange d'asphalte, procédé de fabrication de composition d'asphalte, et procédé de fabrication de mélange d'asphalte - Google Patents

Composition d'asphalte, appareil de fabrication de composition d'asphalte, système de fabrication de composition d'asphalte, mélange d'asphalte, procédé de fabrication de composition d'asphalte, et procédé de fabrication de mélange d'asphalte Download PDF

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WO2022138805A1
WO2022138805A1 PCT/JP2021/047817 JP2021047817W WO2022138805A1 WO 2022138805 A1 WO2022138805 A1 WO 2022138805A1 JP 2021047817 W JP2021047817 W JP 2021047817W WO 2022138805 A1 WO2022138805 A1 WO 2022138805A1
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Prior art keywords
asphalt
aggregate
silane compound
organic silane
base oil
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PCT/JP2021/047817
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English (en)
Japanese (ja)
Inventor
悦樵 呉
彰 瀬尾
健太郎 野口
正実 金丸
裕 南
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出光興産株式会社
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Priority to JP2022571612A priority Critical patent/JPWO2022138805A1/ja
Priority to AU2021410102A priority patent/AU2021410102A1/en
Publication of WO2022138805A1 publication Critical patent/WO2022138805A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/54—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch

Definitions

  • the present invention relates to an asphalt composition that improves water resistance by suppressing separation between asphalt and aggregate, an asphalt composition manufacturing apparatus, an asphalt composition manufacturing system, an asphalt mixture, a method for manufacturing an asphalt composition, and the like. Regarding the manufacturing method of asphalt mixture.
  • asphalt peeling phenomenon has come to be mentioned as a main cause of damage to asphalt pavement, in which rainwater or groundwater permeates between the asphalt and the aggregate and the asphalt coated on the surface of the aggregate peels off. rice field.
  • peeling phenomenon between the asphalt and the aggregate occurs, the function of adhering the aggregates to each other is deteriorated, and there is a possibility that cracks, potholes, and the like are easily damaged.
  • Patent Document 3 is an asphalt composition containing an asphalt base oil and a silane-containing coupling agent.
  • the base of the silane-containing coupling agent is a butadiene polymer, the flash point is low, the stability of the properties cannot be ensured during storage in factories, warehouses, etc., and further during mass storage. There is a problem of lack of safety.
  • the present disclosure has been devised in view of the above-mentioned points, and the purpose thereof is to provide a technique for suppressing peeling between asphalt and aggregate to improve water resistance.
  • the organic silane compound contains an asphalt base oil and an organic silane compound, and the organic silane compound contains silicon element in terms of silicon atom, which is 14% by mass or more and 300% by mass with respect to the asphalt composition.
  • Techniques can be provided that include:
  • the present inventors have diligently studied the component composition of the asphalt composition and the asphalt mixture and the content thereof. As a result, they have newly found that an organic silane compound is added in order to improve the water resistance performance by suppressing the peeling between the asphalt and the aggregate, and have completed the present invention.
  • an asphalt composition an asphalt composition manufacturing apparatus, an asphalt composition manufacturing system, an asphalt mixture, an asphalt composition manufacturing method, and an asphalt mixture manufacturing method will be described in detail.
  • the peeling resistance described below indicates the adhesiveness between the aggregate and the asphalt, and indicates that the asphalt is less likely to be peeled from the aggregate due to the increased peeling resistance. ..
  • the asphalt composition in the present embodiment contains at least an asphalt base oil and an organic silane compound, respectively, and the organic silane compound contains silicon element in terms of silicon atom, which is 14 mass ppm or more and 300 mass by mass with respect to the asphalt composition. Contains ppm or less.
  • the content of the silicon element derived from the organic silane compound contained in the asphalt composition in the present embodiment is determined by using JPI-5S-38-03, lubricating oil, additive element test method, and inductively coupled plasma emission spectroscopy. Can be detected. Before performing the spectroscopic analysis, the sample dissolved in kerosene was subjected to a centrifuge, for example, 28930 G was added for 20 minutes, impurities in the asphalt were removed using the density difference, and the supernatant was subjected to spectroscopic analysis. ..
  • Asphalt base oil includes, for example, straight asphalt, solvent-free asphalt such as propane-free asphalt, solvent-free asphalt, blown asphalt, semi-blown asphalt, SBS (styrene-butadiene-styrene copolymer), and EEA (ethylene ethyl acrylate).
  • Etc. and reinforced asphalt such as modified asphalt are used as appropriate, respectively or in combination.
  • the content of the asphalt base oil with respect to the entire asphalt composition in the present embodiment is preferably 89.3% by weight or more and 99.5% by weight or less.
  • the straight asphalt As the straight asphalt, the asphalt specified in JIS K 2207 or a mixture thereof can be used. In the present embodiment, this straight asphalt can be used from needle entry grades 40 to 60 to 200 to 300 equivalent.
  • solvent removal oil corresponds to a fraction (high-viscosity lubricating oil fraction) extracted from vacuum-distilled residual oil using a solvent (see "2nd Edition Petroleum Dictionary", edited by the Petroleum Society, 2005, p.542. ). Propane or propane and butane may be used as the solvent.
  • Solvent-free asphalt corresponds to the residue obtained by extracting solvent-free oil (high-viscosity lubricating oil fraction) from vacuum-distilled residual oil ("Second Edition Petroleum Dictionary", edited by the Petroleum Society, 2005, p.542. reference). In particular, when propane or propane and butane are used as the solvent, it is called propane-free asphalt.
  • the blown asphalt is, for example, the asphalt defined in JIS K 2207.
  • Semi-blown asphalt is, for example, "Asphalt Pavement Outline", published by Japan Road Association, January 13, 1997, p. 51, Semi-blown asphalt as defined in Table-3.3.4.
  • Organic silane compound in the present embodiment contains 14% by mass or more and 300% by mass or less of the silicon element in terms of silicon atoms with respect to the asphalt composition.
  • the organic silane compound is an element of silicon in terms of silicon atom and is less than 14 mass ppm with respect to the asphalt composition, the peeling between the asphalt and the aggregate cannot be suppressed, and the water resistance performance cannot be improved.
  • the silicon element derived from silica (SiO 2 ) that cannot be completely separated may be contained in the asphalt composition in an amount of about 10 mass ppm in terms of silicon atom.
  • the silicon element is about 10 mass ppm with respect to the asphalt composition in terms of silicon atom, it is not possible to suppress the peeling of the asphalt and the aggregate, and it is not possible to improve the water resistance performance. .. Further, even if it is added in excess of 300 mass ppm, not only the effect of suppressing peeling is saturated, but also the cost of the asphalt composition increases.
  • the organic silane compound in the present embodiment is, for example, a silane-modified petroleum resin (hereinafter referred to as a silane-modified petroleum resin), and a silicon element is added to the silane-modified petroleum resin from 0.1 to 0.1 in terms of silicon atom. Contains 10% by mass.
  • the content of silicon element in the silane-modified petroleum resin can be measured by ICP emission spectroscopic analysis such as JPI-5S-38-03 Lubricating oil-Additional element test method-Inductively coupled plasma emission spectroscopy. Specifically, 0.1 g of a silane-modified petroleum resin is heated at 550 ° C.
  • the silane-modified petroleum resin contains 0.1 to 10% by mass, preferably 0.3 to 8% by mass, and 0.5 to 2% by mass of silicon element in terms of silicon atom with respect to the silane-modified petroleum resin. Is more preferable.
  • the silane-modified petroleum resin is preferably a silane-modified hydrogenated petroleum resin having an organic silane structure. Of these, a silane-modified hydrogenated petroleum resin in which an alkoxysilyl group is bonded to the main chain of the hydrogenated petroleum resin via a bonding portion is preferable.
  • petroleum resin refers to aliphatic olefins and aliphatic diolefins having 4 to 10 carbon atoms, or aliphatic diolefins having 8 carbon atoms, which are obtained as by-products during the production of olefins such as ethylene by thermal decomposition of petroleums such as naphtha. It is a resin obtained by polymerizing or copolymerizing one or more unsaturated compounds selected from the above aromatic compounds having an olefinically unsaturated bond.
  • the petroleum resin is, for example, an "aliphatic petroleum resin” obtained by polymerizing aliphatic olefins or aliphatic diolefins, an "aromatic petroleum resin” obtained by polymerizing an aromatic compound having an olefinic unsaturated bond, or an aliphatic resin. It can be roughly classified into “aliphatic-aromatic copolymerized petroleum resin” which is a copolymer of olefins and aliphatic diolefins and an aromatic compound having an olefinically unsaturated bond.
  • Examples of the aliphatic olefins having 4 to 10 carbon atoms include butene, pentene, hexene, and heptene.
  • Examples of aliphatic diolefins having 4 to 10 carbon atoms include butadiene, pentadiene, isoprene, piperylene, cyclopentadiene, dicyclopentadiene, and methylpentadiene.
  • examples of the aromatic compound having 8 or more carbon atoms and having an olefinically unsaturated bond include styrene, ⁇ -methylstyrene, ⁇ -methylstyrene, vinyltoluene, vinylxylene, inden, methylinden, and ethylinden. ..
  • the raw material compound of this petroleum resin does not necessarily have to be a by-product of olefin production by thermal decomposition of petroleum such as naphtha, and a chemically synthesized unsaturated compound may be used.
  • Preferred preferred examples of the petroleum resin are a dicyclopentadiene-based petroleum resin obtained by polymerizing cyclopentadiene or dicyclopentadiene, or a dicyclopentadiene-styrene-based petroleum resin obtained by copolymerizing these cyclopentadiene or dicyclopentadiene with styrene.
  • Examples thereof include petroleum resins, C5-based petroleum resins obtained by polymerizing isoprene and piperylene, and C9-based petroleum resins obtained by polymerizing C9 monomers such as inden and vinyltoluene.
  • the "hydrogenated petroleum resin” here is a petroleum resin in which a hydrogen atom is added to the petroleum resin.
  • the hydrogenated petroleum resin includes a fully hydrogenated petroleum resin in which an unsaturated bond does not substantially remain and a partially hydrogenated petroleum resin in which an unsaturated bond remains, and is preferably a fully hydrogenated petroleum resin.
  • a hydrogenated aliphatic-aromatic copolymer petroleum resin is preferable.
  • a direct bond is bonded to a carbon atom contained in a hydrogenated polymer (hydrated petroleum resin) obtained by polymerizing an aromatic compound having a saturated bond and a hydrogen atom is added, and an alkoxysilyl group is further bonded. To say.
  • alkoxysilyl group a trialkoxysilyl group having an alkoxy group having 1 to 20 carbon atoms which may be linear or branched is preferable, and an alkoxy group having 1 to 10 carbon atoms which may be linear or branched is preferable.
  • the trialkoxysilyl group having is more preferable. Specific examples thereof include a trimethoxysilyl group, a triethoxysilyl group, and a tripropoxysilyl group, and a trimethoxysilyl group and a triethoxysilyl group are preferable.
  • the bonding portion may be any divalent or higher organic group that can be bonded to the carbon atom of the main chain of the hydrogenated petroleum resin and can be bonded to an alkoxysilyl group, preferably an alkylene group, and is an alkylene group having 2 to 3 carbon atoms. Is more preferable.
  • the asphalt composition composed of the above-mentioned composition is at least blended (mixed) with aggregate and paved as an asphalt mixture, for example, on a predetermined base surface of road pavement.
  • a first example of a manufacturing system for an asphalt composition and an asphalt mixture composed of the above-mentioned component compositions will be described with reference to FIG.
  • the asphalt manufacturing plant 100 as a manufacturing system for an asphalt composition composed of the above-mentioned composition or an asphalt mixture containing this asphalt composition mainly comprises an asphalt base oil container 101 for storing and storing asphalt base oil. It is composed of a first mixing container 102 for mixing asphalt base oil and various additives such as the above-mentioned organic silane compound.
  • the asphalt manufacturing plant 100 has a first product container 103 for storing and storing the asphalt composition produced by mixing, and a first stirring device (mixing device) 105 provided in the first mixing container 102. It is configured to include any one or all of the additive supply device 106 for supplying various additives, at least one of the first stirring device 105 and the control device (control unit) 108 for controlling the additive supply device 106. May be.
  • the asphalt base oil container 101 and the first mixing container 102 are connected by a first supply path 104, and the asphalt base oil maintained at a predetermined temperature is asphalt through the first supply path 104.
  • a predetermined amount is supplied from the base oil container 101 to the first mixing container 102.
  • piping is used for the first supply path 104.
  • first mixing container 102 and the first product container 103 are connected by a second supply path 107, and the asphalt composition produced in the first mixing container 102 is the first product container 103. Will be transferred to and stored and maintained at a predetermined temperature for a predetermined period.
  • second supply path 107 for example, piping is used.
  • an additive supply device 106 for supplying various additives such as an organic silane compound and a first stirring device for stirring the asphalt base oil and the organic silane compound at a predetermined rotation speed ( A first mixing device) 105 is provided.
  • the asphalt composition manufacturing apparatus is configured including the first mixing container 102 and the first stirring device 105.
  • the asphalt composition may be manufactured by including the additive supply device 106 and the control device 108 described later.
  • the control device 108 is a device that controls the temperature control and supply amount of various materials, and is electrically connected to the first stirring device 105 and the additive supply device 106 by wire or wirelessly.
  • control device 108 includes a storage device (storage unit) 110 such as an HDD or a CD that stores predetermined parameters, and a processing device (processing unit) 109 such as a CPU that reads out each parameter and controls the target device. It has at least an input device (input unit) 111 using a UI or the like for inputting each parameter or necessary data or inputting a signal for performing necessary processing. Further, it may have an output device such as a display or a printer (not shown).
  • the processing device 109, the storage device 110, and the input device 111 are each electrically connected to each other.
  • the asphalt manufacturing plant 100 stores a second mixing container 112 for producing an asphalt mixture by mixing the produced asphalt composition and the aggregate, and an asphalt mixture produced by the second mixing container 112. -It may be configured to include a second product container 113 for storage. Further, the asphalt manufacturing plant 100 includes a second stirring device (second mixing device) 115 provided in the second mixing container 112, an aggregate supply device 116 for supplying aggregate, and a second stirring device 115. And any one or all of the control device (control unit) 108 for controlling the aggregate supply device 116 may be included in the configuration.
  • the first product container 103 and the second mixing container 112 are connected by a third supply path 114.
  • the asphalt composition maintained at a predetermined temperature is supplied from the first product container 103 to the second mixing container 112 via the third supply path 114 in a predetermined amount.
  • the third supply path 114 for example, piping is used.
  • the second mixing container 112 and the second product container 113 are connected by a fourth supply path 117, and the asphalt mixture produced in the second mixing container 112 is transferred to the second product container 113. Therefore, it will be stored and maintained at a predetermined temperature for a predetermined period.
  • a truck, a bucket, a basket, or the like is used for the fourth supply path 117.
  • the aggregate supply device 116 for supplying the aggregate, the asphalt composition containing the asphalt base oil and the organic silane compound, and the aggregate are stirred at a predetermined rotation speed.
  • a second stirring device (second mixing device) 115 is provided.
  • the asphalt mixture manufacturing apparatus is configured including the second mixing container 112 and the second stirring device 115. It should be noted that the asphalt mixture manufacturing apparatus may be included, including the aggregate supply apparatus 116.
  • the control device 108 is electrically interconnected with the second stirring device 115 and the aggregate supply device 116.
  • the method for producing an asphalt composition includes an additive mixing step S101.
  • the method for producing an asphalt mixture includes an asphalt mixture manufacturing step S100 in which an asphalt base oil, an organic silane compound, and an aggregate are mixed.
  • the asphalt mixture manufacturing step S100 includes, for example, an additive mixing step S101, a first storage step S102, and an aggregate mixing step S103.
  • additive mixing step S101 In the additive mixing step S101, the asphalt base oil and the organic silane compound are mixed to produce an asphalt composition.
  • a predetermined amount of the organic silane compound is added to the asphalt base oil in the first mixing container 102. Then, the first stirring device 105 stirs and mixes for a predetermined time under the condition that the rotation speed is, for example, 140 ° C. or higher and 2,000 rpm or higher and 4,000 rpm or lower.
  • the asphalt composition produced in the additive mixing step S101 contains silicon element in an amount of 14 mass ppm or more and 300 mass ppm or less in terms of silicon atom.
  • First storage step (asphalt composition storage step): S102)
  • the asphalt composition produced in the additive mixing step S101 is transferred to the first product container 103 for temporary storage and storage.
  • the temperature may be controlled by, for example, the control device 108 so as to maintain a predetermined temperature in the product container.
  • aggregate mixing step S103 In the aggregate mixing step S103, after the asphalt composition is produced or stored, at least an aggregate having a predetermined particle size is added to the asphalt composition, for example, at a predetermined rotation speed of about 145 ° C. To produce an asphalt mixture having desired properties by mixing at. This step is not necessary when selling or shipping the asphalt composition.
  • Step S104 the asphalt mixture produced in the aggregate mixing step S103 is transferred to the second product container 113 for temporary storage and storage.
  • the temperature may be controlled by, for example, the control device 108 so as to maintain a predetermined temperature in the product container.
  • the asphalt composition in the present embodiment contains silicon element in terms of silicon atoms, which is 14 mass ppm or more and 300 mass ppm or less with respect to the asphalt composition. Thereby, the peeling resistance can be improved. Therefore, it is possible to suppress the peeling of the asphalt and the aggregate and improve the water resistance performance.
  • the asphalt composition in the present embodiment has a high flash point, can ensure the stability of properties when stored in a factory, warehouse, etc., and can further secure safety when stored in large quantities.
  • the asphalt mixture in the present embodiment at least an aggregate is mixed with the asphalt composition having the above-mentioned component composition.
  • the peeling resistance can be improved. Therefore, it is possible to suppress the peeling of the asphalt and the aggregate and improve the water resistance performance.
  • the method for producing an asphalt mixture in the present embodiment includes an asphalt mixture manufacturing step S100 in which an asphalt base oil, an organic silane compound, and an aggregate are mixed, and an asphalt composition containing the asphalt base oil and the organic silane compound.
  • the substance contains silicon element of 14 mass ppm or more and 300 mass ppm or less in terms of silicon atom. Thereby, the peeling resistance can be improved. Therefore, it is possible to suppress the peeling of the asphalt and the aggregate and improve the water resistance performance.
  • the asphalt mixture production step S100 is carried out by an additive mixing step S101 for producing an asphalt composition by mixing an asphalt base oil and an organic silane compound, and an additive mixing step S101.
  • an aggregate mixing step S103 which mixes the produced asphalt composition with the aggregate. This makes it possible to suppress variations in the quality of the asphalt composition.
  • the asphalt base oil container 101 and the first mixing container 102 are connected by the first supply path 104.
  • the asphalt base oil maintained at a predetermined temperature is supplied from the asphalt base oil container 101 to the first mixing container 102 via the first supply path 104 in a predetermined amount.
  • piping is used for the first supply path 104.
  • an additive supply device 106 for supplying various additives such as an organic silane compound, an aggregate supply device 116 for supplying an aggregate, an asphalt base oil and an organic silane compound are provided.
  • a first stirring device (first mixing device) 105 for stirring the aggregate and the aggregate at a predetermined rotation speed is provided.
  • the asphalt base oil, the organic silane compound, and the aggregate can be simultaneously mixed by the first stirring device 105 to produce an asphalt mixture.
  • the resulting asphalt mixture contains an asphalt composition containing an asphalt base oil and an organic silane compound.
  • the first mixing container 102 and the first product container 103 are connected by a second supply path 107, and the asphalt mixture produced in the first mixing container 102 is transferred to the first product container 103. Therefore, it will be stored and maintained at a predetermined temperature for a predetermined period.
  • a truck, a bucket, or a basket is used for the second supply path 107.
  • the method for producing an asphalt mixture includes an asphalt mixture manufacturing step S200 in which an asphalt base oil, an organic silane compound, and an aggregate are mixed.
  • the asphalt mixture manufacturing step S200 includes, for example, an aggregate mixing step S201 and a first storage step S202.
  • aggregate mixing step S201 In the aggregate mixing step S201, the asphalt base oil, the organic silane compound, and the aggregate are simultaneously mixed to produce an asphalt mixture.
  • the asphalt base oil, the organic silane compound, and the aggregate are supplied to the first mixing container 102. Then, the asphalt base oil, the organic silane compound, and the aggregate are mixed in the first stirring device 105 under the conditions of, for example, 130 ° C. or higher for 30 seconds or longer, preferably 145 ° C. or higher for 45 seconds or longer. Stir and mix for a predetermined time to produce an asphalt mixture.
  • the asphalt mixture contains an asphalt composition containing an asphalt base oil and an organic silane compound.
  • the asphalt composition contained in the asphalt mixture contains 14% by mass or more and 300% by mass or less of silicon element in terms of silicon atom.
  • First storage step (asphalt mixture storage step): S202)
  • the produced asphalt mixture is transferred to the first product container 103 for temporary storage and storage.
  • the temperature may be controlled by, for example, the control device 108 so as to maintain a predetermined temperature in the product container.
  • the asphalt mixture manufacturing step includes an aggregate mixing step of simultaneously mixing an asphalt base oil, an organic silane compound, and an aggregate. This makes it possible to select the type of asphalt base oil and aggregate to be mixed with the organic silane compound according to the demand for the asphalt mixture. Therefore, it is possible to flexibly meet the demand for asphalt mixture.
  • the container for storing the asphalt composition containing the asphalt base oil and the organic silane compound can be omitted, and the existing container for storing the asphalt base oil can be used. Therefore, it is possible to save space in the asphalt manufacturing plant.
  • an asphalt base oil, an organic silane compound, and an aggregate are simultaneously mixed to produce an asphalt mixture. That is, the asphalt mixture can be produced by one mixing. Therefore, it is possible to improve the production efficiency of the asphalt mixture.
  • the asphalt base oil container 101 and the first mixing container 102 are connected by the first supply path 104, and the asphalt base oil maintained at a predetermined temperature is the first.
  • a predetermined amount is supplied from the asphalt base oil container 101 to the first mixing container 102 via the supply path 104 of the above.
  • piping is used for the first supply path 104.
  • an aggregate supply device 116 for supplying the aggregate and a first stirring device (first mixing device) for stirring the asphalt base oil and the aggregate at a predetermined rotation speed are provided.
  • a first stirring device for stirring the asphalt base oil and the aggregate at a predetermined rotation speed
  • the asphalt base oil and the aggregate can be mixed by the first stirring device 105.
  • an asphalt mixture containing an asphalt base oil and an aggregate can be produced.
  • the first mixing container 102 and the first product container 103 are connected by a second supply path 107, and the asphalt mixture produced in the first mixing container 102 is transferred to the first product container 103. Therefore, it will be stored and maintained at a predetermined temperature for a predetermined period.
  • a truck, a bucket, or a basket is used for the second supply path 107.
  • first product container 103 and the second mixing container 112 are connected by a third supply path 114.
  • the asphalt mixture maintained at a predetermined temperature is supplied from the first product container 103 to the second mixing container 112 via the third supply path 114 in a predetermined amount.
  • the third supply path 114 for example, a truck, a bucket, or a basket is used.
  • the second mixing container 112 and the second product container 113 are connected by a fourth supply path 117, and the asphalt mixture produced in the second mixing container 112 is transferred to the second product container 113. Therefore, it will be stored and maintained at a predetermined temperature for a predetermined period.
  • a truck, a bucket, or a basket is used for the fourth supply path 117.
  • the second mixing container 112 is provided with an additive supply device 106 for supplying various additives such as an organic silane compound, an asphalt mixture containing an asphalt base oil and an aggregate, and an organic silane compound.
  • a second stirring device (second mixing device) 115 for stirring according to the number of rotations of the above is provided.
  • the asphalt mixture can be produced by mixing the asphalt base oil, the organic silane compound, and the aggregate.
  • the resulting asphalt mixture contains an asphalt composition containing an asphalt base oil and an organic silane compound.
  • the method for producing an asphalt mixture includes an asphalt mixture manufacturing step S300 in which an asphalt base oil, an organic silane compound, and an aggregate are mixed.
  • the asphalt mixture manufacturing step S300 includes, for example, an aggregate mixing step S301, a first storage step S302, an additive mixing step S303, and a second storage step S304.
  • aggregate mixing step S301 In the aggregate mixing step S301, the asphalt base oil and the aggregate are mixed to produce an asphalt mixture.
  • the asphalt base oil and the aggregate are stirred and mixed in the first stirring device 105 at a predetermined rotation speed of, for example, about 145 ° C. for a predetermined time to produce an asphalt mixture.
  • First storage step (asphalt mixture storage step): S302)
  • the asphalt mixture produced in the aggregate mixing step S301 is transferred to the first product container 103 for temporary storage and storage.
  • the temperature may be controlled by, for example, the control device 108 so as to maintain a predetermined temperature in the product container.
  • additive mixing step S303 In the additive mixing step S303, the asphalt mixture is mixed with the organic silane compound after the asphalt mixture is produced or stored.
  • a predetermined amount of the organic silane compound is added to the asphalt mixture, and the condition is such that, for example, at 130 ° C. or higher for 30 seconds or longer, preferably 145 ° C. or higher for 45 seconds or longer in the second stirring device 115. Stir and mix for a predetermined time, such as mixing in, to produce an asphalt mixture.
  • the asphalt mixture produced in the additive mixing step S303 contains an asphalt composition containing an asphalt base oil and an organic silane compound.
  • the asphalt composition contained in the asphalt mixture contains 14% by mass or more and 300% by mass or less of silicon element in terms of silicon atom.
  • Step S304 the asphalt mixture produced in the additive mixing step S303 is transferred to the second product container 113 for temporary storage and storage.
  • the temperature may be controlled by, for example, the control device 108 so as to maintain a predetermined temperature in the product container.
  • the asphalt mixture manufacturing step S300 is performed by the aggregate mixing step S301 for mixing the asphalt base oil and the aggregate to produce the asphalt mixture and the aggregate mixing step S301.
  • the additive mixing step S303 for mixing the produced asphalt mixture and the organic silane compound is included. This makes it possible to select the type of asphalt mixture to be mixed with the organic silane compound according to the demand for the asphalt mixture. Therefore, it is possible to flexibly meet the demand for asphalt mixture.
  • the container for storing the asphalt composition containing the asphalt base oil and the organic silane compound can be omitted, and the existing container for storing the asphalt base oil can be used. Therefore, it is possible to save space in the asphalt manufacturing plant.
  • Crushed stone made of hard sandstone is used as the aggregate, and stone powder made by crushing limestone is used to prepare the composition of fine particles (components with a small particle size) to prepare a specimen.
  • the limestone crushed stone powder used to adjust the particle size of the aggregate is 100% at a sieve mass of 600 ⁇ m, 90-100% at 150 ⁇ m, and 75 ⁇ m, which is compatible with JIS A5008 “limestone powder for pavement”.
  • the preparation of the specimen is roughly classified into two stages of mixing the asphalt composition and the aggregate and rolling compaction.
  • 600 g of the asphalt composition heated to 155 ° C. and 10119 g of the aggregate heated to 165 ° C. are prepared.
  • the aggregate was put in a mixer, and only the aggregate was mixed for 60 seconds to make it uniform. Mixing was temporarily stopped, 600 g of the asphalt composition was added to the mixer, and then the asphalt composition and the aggregate were mixed for 120 seconds.
  • the asphalt composition and aggregate after mixing were placed in a wheel tracking test formwork (inner dimensions: length 30.0 cm, width 30.0 cm, depth 5.0 cm) and compacted.
  • the rolling compaction is applied to the mixed asphalt by rolling a columnar roller having a radius of 460 mm under the rolling compaction temperature shown in Table 2 below. This rolling compaction is performed in two stages of primary rolling compaction and secondary rolling compaction. After that, it was dried for 8 hours to complete the preparation of the specimen.
  • the specimen prepared by the above-mentioned fabrication method is installed in a double wheel tracking tester and immersed in a water bath constantly heated to 60 ° C. assuming the road surface temperature in summer with the water surface at least 2 mm higher than the upper surface of the specimen for 2 hours. Then, for example, as shown in FIG. 7, the specimen 5 having a size of 30 ⁇ 30 ⁇ 5 cm was cured. Next, the specimen 5 is loaded with a downward load of 700 N by the wheels 11 in a water bath at 60 ° C., which is the same as during curing, with the water surface at least 2 mm higher than the upper surface of the specimen, in the direction of the arrow in the figure. It was made to make a round trip at a pace of 26.5 round trips / minute. By the way, the traveling position by the wheel 11 was the same traveling path without shifting.
  • FIG. 8 shows an example of the amount of deformation of the specimen, that is, the amount of subsidence (mm) with respect to the number of wheel traveling reciprocations on the specimen in the water resistance evaluation test.
  • This subsidence amount is the subsidence depth (mm) in the depth direction from the surface of the specimen 5. The test was terminated when the amount of subsidence reached 20 mm or the wheel completed 10,000 reciprocating round trips.
  • the difference in the amount of subsidence continues to decrease. This means that no peeling inflection has occurred.
  • the load is continuously applied beyond the number of round trips in which the difference in the amount of subsidence becomes the minimum value, there is no inflection point, so that the separation between the asphalt and the aggregate is suppressed and the state remains convex upward. It is considered that the amount of subsidence tends to increase. Therefore, when there is no inflection point, it is evaluated as being able to improve the peeling resistance of asphalt, and is represented by “ ⁇ ” in Table 3.
  • Table 3 shows the specifications of the asphalt compositions of Examples 1 to 6 and Comparative Examples 1 to 5 and the evaluation results of the asphalt peeling resistance.
  • Example 1 The asphalt base oil used in Example 1, Example 2, Example 3, Example 4, Example 5, Example 6, Comparative Example 1, Comparative Example 2, Comparative Example 3, Comparative Example 4, and Comparative Example 5 , Straight asphalt with needle penetration grade 60-80.
  • Typical properties are a needle insertion degree of 67 (1/10 mm), a softening point of 48.0 ° C, and a density of 1.036 kg / m 3 at 15 ° C.
  • the organic silane compounds used in Example 1, Example 2, Example 3, Example 4, Example 5, Example 6, Comparative Example 1 and Comparative Example 2 have an alkylene group having a trimethoxysilyl group as a bond.
  • a silane-modified hydrogenated petroleum resin bonded to the main chain of a fully hydrogenated dicyclopentadiene-styrene petroleum resin via.
  • the organic silane compound used has a melting point of 100 ° C., a flash point of 234 ° C., and a bromine value of 2.5 g / 100 g.
  • the asphalt base oil and the organic silane compound were mixed to form an asphalt composition, and then the asphalt composition and the aggregate were mixed to form an asphalt mixture. The material was produced.
  • an organic silane compound was mixed to form an asphalt mixture.
  • the petroleum resin used in Comparative Example 3 and Comparative Example 4 is a completely hydrogenated dicyclopentadiene-styrene-based petroleum resin that has not been silane-modified.
  • the petroleum resin used has a melting point of 100 ° C., a flash point of 234 ° C., and a bromine value of 2.5 g / 100 g.
  • Examples 1, Example 2, Example 3, Example 4, Example 5, Example 6, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 are contained in the asphalt composition.
  • the content of silicon element derived from the organic silane compound was measured using JPI-5S-38-03 Lubricating oil-Additional element test method-Inductively coupled plasma emission spectroscopy. Before performing spectroscopic analysis, centrifuge each specimen dissolved in kerosene, add 28930G for 20 minutes, remove impurities in the asphalt using the density difference, and perform spectroscopic analysis on the supernatant. rice field.
  • the above-mentioned slope has a negative value, and there is no inflection. This makes it possible to improve the peeling resistance of asphalt. Therefore, peeling between the asphalt and the aggregate can be suppressed, and the water resistance can be improved.
  • the asphalt mixture is an asphalt mixture obtained by mixing an asphalt base oil and an organic silane compound to form an asphalt composition and then mixing an aggregate
  • the asphalt base oil and the asphalt base oil are mixed.
  • It is an asphalt mixture mixed with an organic silane compound when mixed with an aggregate. That is, even when the asphalt base oil and the organic silane compound are mixed and then the aggregate is mixed, or when the asphalt base oil and the aggregate are mixed and the organic silane compound is mixed, the peeling resistance of the asphalt is improved. Can be improved. Therefore, peeling between the asphalt and the aggregate can be suppressed, and the water resistance can be improved.
  • Asphalt manufacturing plant 101 Asphalt base oil container 102: First mixing container 103: First product container 104: First supply path 105: First stirring device 106: Additive supply device 107: Second Supply path 108: Control device 109: Processing device 110: Storage device 111: Input device 112: Second mixing container 113: Second product container 114: Third supply path 115: Second stirring device 116: Aggregate Supply device 117: Fourth supply path

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Abstract

L'invention concerne une technique visant à supprimer le pelage entre l'asphalte et l'agrégat afin d'améliorer les performances de résistance à l'eau. Une composition d'asphalte selon la présente invention est caractérisée en ce qu'elle comprend de 14 à 300 ppm en masse d'élément de silicium en termes d'atome de silicium par rapport à la composition d'asphalte. La composition d'asphalte comprend un composé de silane organique, et le composé de silane organique est de préférence une résine de pétrole modifiée par silane, et plus préférablement une résine de pétrole hydrogénée modifiée par un silane ayant une structure de silane organique.
PCT/JP2021/047817 2020-12-23 2021-12-23 Composition d'asphalte, appareil de fabrication de composition d'asphalte, système de fabrication de composition d'asphalte, mélange d'asphalte, procédé de fabrication de composition d'asphalte, et procédé de fabrication de mélange d'asphalte WO2022138805A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10279812A (ja) * 1997-04-08 1998-10-20 Sanyo Chem Ind Ltd アスファルト改質剤及びアスファルト組成物
WO2006046473A1 (fr) * 2004-10-25 2006-05-04 Kaneka Corporation Préparation durcissable
JP2020041051A (ja) * 2018-09-10 2020-03-19 昭和シェル石油株式会社 アスファルト組成物およびアスファルト合材

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10279812A (ja) * 1997-04-08 1998-10-20 Sanyo Chem Ind Ltd アスファルト改質剤及びアスファルト組成物
WO2006046473A1 (fr) * 2004-10-25 2006-05-04 Kaneka Corporation Préparation durcissable
JP2020041051A (ja) * 2018-09-10 2020-03-19 昭和シェル石油株式会社 アスファルト組成物およびアスファルト合材

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