WO2019017335A1 - Procédé de revêtement de route - Google Patents

Procédé de revêtement de route Download PDF

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Publication number
WO2019017335A1
WO2019017335A1 PCT/JP2018/026720 JP2018026720W WO2019017335A1 WO 2019017335 A1 WO2019017335 A1 WO 2019017335A1 JP 2018026720 W JP2018026720 W JP 2018026720W WO 2019017335 A1 WO2019017335 A1 WO 2019017335A1
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WO
WIPO (PCT)
Prior art keywords
styrene
asphalt
polyester
less
mass
Prior art date
Application number
PCT/JP2018/026720
Other languages
English (en)
Japanese (ja)
Inventor
橋本　良一
亮司 岩本
Original Assignee
花王株式会社
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 花王株式会社 filed Critical 花王株式会社
Priority to EP18834907.0A priority Critical patent/EP3656920A4/fr
Priority to US16/631,087 priority patent/US11708669B2/en
Priority claimed from JP2018134130A external-priority patent/JP6787588B2/ja
Publication of WO2019017335A1 publication Critical patent/WO2019017335A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/26—Bituminous materials, e.g. tar, pitch
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
    • C08G63/181—Acids containing aromatic rings
    • C08G63/183—Terephthalic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L21/00—Compositions of unspecified rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/22—Binder incorporated in hot state, e.g. heated bitumen

Definitions

  • the present invention relates to a method of paving roads.
  • asphalt pavement using asphalt mixture is often performed .
  • a road surface is formed by an asphalt mixture in which aggregates are joined by asphalt, and has good hardness and durability.
  • asphalt pavement surfaces become wrinkled or cracked due to long-term use, it is necessary to repair the pavement, and as a result, maintenance costs are increased and traffic of vehicles is greatly affected.
  • Patent Document 1 describes a waste toner-containing paving material comprising 100 parts by weight of asphalt and 1 to 10 parts by weight of waste toner.
  • the toner which is a waste with the said pavement material and providing the pavement material excellent in flow resistance, abrasion resistance, and crack resistance, it was conventionally processed as an industrial waste. It is described that the waste toner is reused.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2000-169208
  • the embodiment of the present invention is Step 1: mixing asphalt, thermoplastic elastomer, polyester, and aggregate, obtaining an asphalt mixture, and Step 2: applying the asphalt mixture obtained in step 1 on a road to form an asphalt pavement layer
  • a method of paving a road including the step of forming
  • the polyester has a softening point of 90 ° C. or more and 140 ° C. or less, and a glass transition point of 40 ° C. or more and 80 ° C. or less, and the ratio of the polyester is more than 17 parts by mass relative to 100 parts by mass of the asphalt
  • the present invention relates to a method of paving roads, which is equal to or less than parts by mass.
  • a method of paving a road is Step 1: mixing asphalt, thermoplastic elastomer, polyester, and aggregate, obtaining an asphalt mixture, and Step 2: applying the asphalt mixture obtained in step 1 on a road to form an asphalt pavement layer
  • a method of paving a road including the step of forming The polyester has a softening point of 90 ° C. or more and 140 ° C. or less, and a glass transition point of 40 ° C. or more and 80 ° C. or less, It is the pavement method of the road whose ratio of the said polyester is 17 mass parts or more and 50 mass parts or less with respect to 100 mass parts of said asphalts.
  • the polyester By having a softening point of a predetermined value or more and a glass transition point of a predetermined value or more, the polyester exerts high intermolecular force (van der Waals force), and the thermoplastic elastomer which is an asphalt modifying component and the intermolecular mutual It is thought that it acts and adsorbs to the aggregate.
  • the polyester has a softening point below a predetermined value and a glass transition point within a range below the predetermined value, the stress relaxation property of the pavement (to be resistant to cracking) is maintained in order to leave the flexibility of the thermoplastic elastomer. It is thought that the stability is also improved because the resin of high polarity is adsorbed to the aggregate and the aggregate is anchored while leaving the
  • Binder mixture means a mixture containing asphalt and a thermoplastic elastomer, and is a concept including, for example, a modified asphalt with a thermoplastic elastomer described later.
  • Constituent unit derived from alcohol component means a structure in which hydrogen atom is removed from hydroxyl group of alcohol component
  • constituent unit derived from carboxylic acid component means hydroxyl group from carboxyl group of carboxylic acid component. It means the removed structure.
  • carboxylic acid compound includes not only the carboxylic acid but also an anhydride which is decomposed during the reaction to form an acid, and an alkyl ester of the carboxylic acid (for example, an alkyl group having 1 to 3 carbon atoms) It is.
  • carboxylic acid compound is an alkyl ester of a carboxylic acid
  • the carbon number of the alkyl group which is an alcohol residue of the ester is not counted as the carbon number of the carboxylic acid compound.
  • Step 1 is a step of mixing an asphalt, a thermoplastic elastomer, a polyester and an aggregate to obtain an asphalt mixture.
  • Asphalt As asphalt for example, various asphalts can be used.
  • straight asphalt which is petroleum asphalt for paving, it is possible to cite blown asphalt.
  • Straight asphalt is a residual bituminous substance obtained by processing crude oil with an atmospheric distillation apparatus, a vacuum distillation apparatus or the like.
  • blown asphalt is meant asphalt obtained by heating a mixture of straight asphalt and heavy oil and then blowing in air for oxidation.
  • the penetration of asphalt is preferably more than 40 and preferably 120 or less, more preferably 80 or less, still more preferably 60 or less.
  • the measurement method of penetration is according to the method defined in JIS K2207: 2006.
  • a length of 0.1 mm in which a specified needle vertically enters the sample is represented as 1.
  • the amount of asphalt is preferably 67% by mass or more, more preferably 70% by mass or more, still more preferably 73% by mass or more, still more preferably, based on the total amount of asphalt, thermoplastic elastomer and polyester. It is 75% by mass or more, and preferably 85% by mass or less, more preferably 83% by mass or less.
  • thermoplastic elastomer for example, styrene / butadiene block copolymer (hereinafter, also simply referred to as “SB”), styrene / butadiene / styrene block copolymer (hereinafter, also simply referred to as “SBS”), styrene / butadiene random Copolymer (hereinafter referred to simply as “SBR”), styrene / isoprene block copolymer (hereinafter referred to simply as "SI”), styrene / isoprene / styrene block copolymer (hereinafter referred to simply as "SIS”) And styrene / isoprene random copolymer (hereinafter, also simply referred to as “SIR”), ethylene / vinyl acetate copolymer, and ethylene /
  • SBS styrene / butadiene
  • thermoplastic elastomers As a commercial item of ethylene / acrylic acid ester copolymer, "Elvaroy” (made by Dupont company) is mentioned, for example.
  • thermoplastic elastomers styrene / butadiene block copolymer, styrene / butadiene / styrene block copolymer, styrene / butadiene random copolymer, styrene / isoprene block copolymer, styrene / isoprene / styrene block copolymer
  • Preferred is a combined styrene / isoprene random copolymer, more preferably a styrene / butadiene / styrene block copolymer or a styrene / butadiene random copolymer.
  • the amount of the thermoplastic elastomer is preferably 0.5% by mass or more, more preferably 1% by mass or more, still more preferably 1.5% by mass, based on the total amount of asphalt, thermoplastic elastomer and polyester. % Or more, preferably 30% by mass or less, more preferably 20% by mass or less, still more preferably 10% by mass or less, still more preferably 7% by mass or less.
  • the proportion of the thermoplastic elastomer is preferably 0.1 parts by mass or more, more preferably 0.5 parts by mass or more, still more preferably 1 part by mass or more, still more preferably 2 parts by mass with respect to 100 parts by mass of asphalt.
  • the amount is preferably not less than 30 parts by mass, more preferably 20 parts by mass or less, still more preferably 10 parts by mass or less, still more preferably 5 parts by mass or less.
  • Asphalt and thermoplastic elastomers are preferably used as binder mixtures which are mixtures of these.
  • binder mixture include straight asphalt which is modified asphalt (hereinafter also referred to as "modified asphalt”) and the like.
  • Polyester has a softening point of 90 ° C. or more and 140 ° C. or less, and a glass transition point of 40 ° C. or more and 80 ° C. or less from the viewpoint of achieving both excellent stability and stress relaxation properties.
  • polyester preferably contains a structural unit derived from an alcohol component containing 60 mol% or more of an alkylene oxide adduct of bisphenol A, and And at least one selected from the group consisting of terephthalic acid and isophthalic acid, having a structural unit derived from an acid component, and more preferably, a structural unit derived from an alcohol component containing 60 mol% or more of an alkylene oxide adduct of bisphenol A And a structural unit derived from a carboxylic acid component containing 50 mol% or more.
  • the alcohol component examples include aliphatic diols, aromatic diols, and polyhydric alcohols having a valence of 3 to 8. These alcohol components can be used alone or in combination of two or more.
  • the alcohol component contains an alkylene oxide adduct of bisphenol A from the viewpoint of achieving both the excellent stability and the stress relaxation property of the asphalt pavement material layer, and preferably the formula (I): [Wherein, OR 1 and R 1 O are alkylene oxides, R 1 is an alkylene group having 2 or 3 carbon atoms, and x and y are positive numbers indicating the average addition mole number of the alkylene oxide, x and y And the alkylene oxide adduct of bisphenol A represented by the following formula is preferable: 1 or more, preferably 1.5 or more, and 16 or less, preferably 8 or less, more preferably 4 or less.
  • the polyester contains a structural unit derived from an alcohol component containing 60 mol% or more of an alkylene oxide adduct of bisphenol A
  • the polyester intermolecularly interacts with the thermoplastic elastomer which is an asphalt modifying component, and is adsorbed to the aggregate
  • the thermoplastic elastomer which is an asphalt modifying component
  • a resin of high rigidity is adsorbed on the aggregate to retain the flexibility while maintaining the flexibility of the thermoplastic elastomer, and the stability is maintained. Is also considered to improve.
  • thermoplastic elastomers in particular, SBS and SBR described later are likely to exhibit this effect.
  • alkylene oxide adduct of bisphenol A represented by the above formula (I) examples include propylene oxide adduct of 2,2-bis (4-hydroxyphenyl) propane (hereinafter, also simply referred to as “BPA”), BPA And ethylene oxide adducts of Among these, a combination of a propylene oxide adduct of BPA and an ethylene oxide adduct of BPA is preferred.
  • the amount of the alkylene oxide adduct of bisphenol A in the alcohol component is preferably at least 65 mol%, more preferably from the viewpoint of achieving both excellent stability and stress relaxation property by intermolecular interaction with the thermoplastic elastomer. It is 80 mol% or more and 100 mol% or less.
  • the molar ratio of propylene oxide adduct of bisphenol A / ethylene oxide adduct of bisphenol A is preferably from the viewpoint of achieving both excellent stability and stress relaxation property by intermolecular interaction with the thermoplastic elastomer. It is 5/95 or more, more preferably 10/90 or more, and preferably 50/50 or less, more preferably 40/60 or less, further preferably 30/70 or less.
  • the aliphatic diol is, for example, an aliphatic diol having 2 to 20 carbon atoms.
  • Examples of aliphatic diols include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,4- Examples include butenediol, 1,3-butanediol, neopentyl glycol, 1,10-decanediol and 1,12-dodecanediol.
  • the trihydric or higher polyhydric alcohol is, for example, a trihydric alcohol. Examples of trihydric or higher polyhydric alcohols include glycerin.
  • Carboxylic acid component examples include aromatic dicarboxylic acid compounds, aliphatic dicarboxylic acid compounds, and trivalent to hexavalent polyvalent carboxylic acid compounds. These carboxylic acid components can be used alone or in combination of two or more.
  • aromatic dicarboxylic acid compound phthalic acid, isophthalic acid, terephthalic acid, naphthalene dicarboxylic acid, or these anhydrides, these alkyl esters (for example, carbon number 1 or more and 3 or less of an alkyl group) are mentioned. .
  • the carboxylic acid component contains one or more selected from the group consisting of terephthalic acid and isophthalic acid from the viewpoint of achieving both excellent stability and stress relaxation properties, and preferably contains terephthalic acid.
  • the amount of one or more selected from terephthalic acid and isophthalic acid in the carboxylic acid component is 50 mol% or more, preferably 60 mol% or more, and more preferably, from the viewpoint of achieving both excellent stability and stress relaxation properties. Is 70 mol% or more, more preferably 75 mol% or more, and preferably 99 mol% or less, more preferably 95 mol% or less, still more preferably 90 mol% or less.
  • the carbon number of the aliphatic dicarboxylic acid is preferably 3 or more, more preferably 4 or more, and preferably 10 or less, more preferably 8 or less, from the viewpoint of achieving both excellent stability and stress relaxation properties.
  • Examples of aliphatic dicarboxylic acid compounds include fumaric acid, maleic acid, oxalic acid, malonic acid, citraconic acid, itaconic acid, glutaconic acid, succinic acid, adipic acid, suberic acid, azelaic acid, sebacic acid and dodecanedioic acid It can be mentioned.
  • saturated or unsaturated dicarboxylic acids having 4 to 8 carbon atoms are preferable, and fumaric acid, maleic acid and adipic acid are preferable from the viewpoint of achieving both excellent stability and stress relaxation properties. More preferred is adipic acid.
  • the content of the aliphatic dicarboxylic acid compound is preferably 1% by mole or more, more preferably 5% by mole or more, and still more preferably 10% by mole, from the viewpoint of achieving both excellent stability and stress relaxation in the carboxylic acid component.
  • the trivalent to hexavalent polyvalent carboxylic acid compound is preferably a trivalent carboxylic acid compound.
  • trivalent to hexavalent polyvalent carboxylic acid compounds include trimellitic acid, 2,5,7-naphthalenetricarboxylic acid and pyromellitic acid.
  • the alcohol component may appropriately contain a monohydric alcohol
  • the carboxylic acid component may appropriately contain a monovalent carboxylic acid compound.
  • the molar ratio of the structural unit derived from the carboxylic acid component to the structural unit derived from the alcohol component [carboxylic acid component / alcohol component] is preferably 0.7 or more, more preferably 0.8 or more from the viewpoint of adjusting the acid value. And preferably 1.5 or less, more preferably 1.3 or less, and still more preferably 1.1 or less.
  • the hydroxyl value of the polyester is preferably 1 mg KOH / g or more, more preferably 5 mg KOH / g or more, still more preferably 8 mg KOH / g or more, still more preferably 10 mg KOH / g or more, still more preferably 13 mg KOH, from the viewpoint of obtaining excellent stability.
  • / G or more and preferably 35 mg KOH / g or less, more preferably 30 mg KOH / g or less, still more preferably 25 mg KOH / g or less, still more preferably 20 mg KOH / g or less, still more preferably 14 mg KOH / g or less .
  • the acid value of the polyester is preferably 1 mg KOH / g or more, more preferably 2 mg KOH / g or more, still more preferably 3 mg KOH / g, from the viewpoint of promoting adsorption to aggregate and further improving the stability of the asphalt pavement layer. Or more, more preferably 5 mg KOH / g or more, still more preferably 10 mg KOH / g or more, still more preferably 12 mg KOH / g or more, and from the viewpoint of increasing the water resistance of pavement, preferably 30 mg KOH / g or less, more preferably 20 mg KOH / G or less, more preferably 18 mg KOH / g or less.
  • the softening point of the polyester is 90 ° C. or more, preferably 95 ° C. or more, more preferably 100 ° C. or more, and 140 ° C. or less, preferably 125 ° C. or less, from the viewpoint of obtaining excellent stability.
  • the temperature is more preferably 115 ° C. or less, still more preferably 108 ° C. or less, still more preferably 105 ° C. or less.
  • the glass transition point of the polyester is 40 ° C. or higher, preferably 45 ° C. or higher, from the viewpoint of achieving both excellent stability and stress relaxation and further improving the stability of the asphalt pavement layer at high temperatures. More preferably, the temperature is 50 ° C. or higher, more preferably 55 ° C. or higher, and the viewpoint of achieving both the excellent stability and the stress relaxation property, and the solubility of the polyester in the plant mix is increased, and the rolling pressure during construction is It is 80 degrees C or less from a viewpoint of performing smoothly, Preferably it is 70 degrees C or less, More preferably, it is 60 degrees C or less.
  • An acid value, a hydroxyl value, a softening point, and a glass transition point can be measured by the method as described in an Example.
  • an acid value, a hydroxyl value, a softening point, and a glass transition point can be adjusted with raw material monomer composition, molecular weight, a catalyst amount, or reaction conditions.
  • the manufacturing method of polyester is not specifically limited, For example, it can manufacture by polycondensing the alcohol component and carboxylic acid component which were mentioned above.
  • the temperature of the polycondensation reaction is not particularly limited, but is preferably 160 ° C. or more and 260 ° C. or less from the viewpoint of reactivity.
  • a total of 100 parts by mass of an alcohol component and a carboxylic acid component is catalyzed by a tin (II) compound having no Sn-C bond such as di (2-ethylhexanoate) tin (II) as a catalyst
  • a tin (II) compound having no Sn-C bond such as di (2-ethylhexanoate) tin (II) as a catalyst
  • 0.01 parts by mass or more, more preferably 0.2 parts by mass or more, and preferably 1.5 parts by mass or less, more preferably 0.6 parts by mass or less may be used.
  • a pyrogallol compound such as gallic acid is used as an esterification catalyst, preferably 0.001 parts by mass or more, more preferably to 100 parts by mass of the total of the alcohol component and the carboxylic acid component. Is preferably 0.005 parts by mass or more, more preferably 0.01 parts by mass or more, and preferably 0.15 parts by mass or less, more preferably 0.10 parts by mass or less, still more preferably 0.05 parts by mass or less May be
  • the proportion of polyester is more than 17 parts by mass, preferably 20 parts by mass or more, more preferably 24 parts by mass or more, from the viewpoint of achieving both excellent stability and stress relaxation property with respect to 100 parts by mass of asphalt. And 50 parts by mass or less, preferably 40 parts by mass or less, more preferably 30 parts by mass or less.
  • the composition containing the above-mentioned asphalt, a thermoplastic elastomer, and polyester may be called an asphalt composition. That is, the asphalt composition according to the embodiment of the present invention comprises asphalt, a thermoplastic elastomer and a polyester, The polyester has a softening point of 90 ° C. or more and 140 ° C. or less, and a glass transition point of 40 ° C. or more and 80 ° C. or less, The ratio of the polyester is more than 17 parts by mass and not more than 50 parts by mass with respect to 100 parts by mass of asphalt.
  • the asphalt pavement material layer which makes compatible the outstanding stability and stress relaxation nature is obtained.
  • the suitable aspect of asphalt, a thermoplastic elastomer, and polyester is as above-mentioned.
  • the aggregate for example, crushed stone, cobbles, gravel, sand, regenerated aggregate, ceramics and the like can be arbitrarily selected and used.
  • any of coarse aggregate with a particle diameter of 2.36 mm or more and fine aggregate with a particle diameter of less than 2.36 mm can be used.
  • the coarse aggregate for example, crushed stone with a particle size range of 2.36 mm to 4.75 mm, crushed stone with a particle size range of 4.75 mm to 12.5 mm, crushed stone with a particle size range of 12.5 mm to 19 mm, a particle size Crushed stone of the range 19 mm or more and 31.5 mm or less is mentioned.
  • the fine aggregate is preferably a fine aggregate having a particle size of not less than 0.075 mm and less than 2.36 mm.
  • Fine aggregates include, for example, river sand, hill sand, mountain sand, sea sand, crushed sand, fine sand, screenings, crushed dust, silica sand, artificial sand, glass cullet, cast sand, recycled aggregate crushed sand .
  • the above particle size is a value defined in JIS 5001-1995. Among these, the combination of coarse aggregate and fine aggregate is preferable.
  • the filler for example, sand
  • the lower limit value of the average particle diameter of the filler is, for example, 0.001 mm or more.
  • the average particle size of the filler is preferably 0.001 mm or more, and preferably 0.05 mm or less, more preferably 0.03 mm or less, and still more preferably 0.02 mm or less.
  • the average particle size of the filler can be measured by a laser diffraction type particle size distribution measuring device.
  • the average particle diameter means an average particle diameter of 50% of volume accumulation.
  • Method of measuring filler average particle size The average particle diameter of the filler is a value measured under the conditions shown below using a laser diffraction type particle size distribution measuring apparatus (“LA-950” manufactured by Horiba, Ltd.).
  • Measurement method Flow method Dispersion medium: Ethanol Sample preparation: 2 mg / 100 mL ⁇ Dispersion method: Stirring, built-in ultrasonic wave 1 minute
  • Fillers include sand, fly ash, calcium carbonate, calcium hydroxide and the like. Among these, calcium carbonate is preferred.
  • the mass ratio of coarse aggregate to fine aggregate is preferably 10/90 or more, more preferably 20/80 or more, still more preferably 30/70 or more, and preferably 90/10 or less, more preferably It is 80/20 or less, more preferably 70/30 or less.
  • the content of aggregate is preferably 800 parts by mass or more, more preferably 900 parts by mass or more, more preferably 1000 parts by mass or more, based on 100 parts by mass in total of asphalt, thermoplastic elastomer and polyester. Preferably it is 2500 mass parts or less, More preferably, it is 2000 mass parts or less, More preferably, it is 1500 mass parts or less.
  • the asphalt mixture contains the aforementioned asphalt, thermoplastic elastomer, polyester and aggregate. According to the asphalt mixture, an asphalt pavement material layer having both excellent stability and stress relaxation properties is obtained.
  • the total content of asphalt, thermoplastic elastomer and polyester in the asphalt mixture is preferably 2% by mass or more, more preferably 3% by mass or more, still more preferably 4% by mass or more, and preferably 15% by mass The content is more preferably 10% by mass or less, still more preferably 9% by mass or less.
  • the asphalt mixture of an example is, for example, 30% by volume to 45% by volume of coarse aggregate, 30% by volume to 50% by volume of fine aggregate, and 5% by volume to 10% by volume of asphalt, Thermoplastic elastomer, and polyester (fine particle size asphalt).
  • the asphalt mixture in one example is, for example, 45% to 70% by volume of coarse aggregate, 20% to 45% by volume of fine aggregate, and 3% to 10% by volume of asphalt, Thermoplastic elastomer, and polyester (dense particle size asphalt).
  • the asphalt mixture of one example is, for example, 70% by volume to 80% by volume coarse aggregate, 10% by volume to 20% by volume fine aggregate, and 3% by volume to 10% by volume asphalt, Thermoplastic elastomer, and polyester (porous asphalt).
  • the asphalt mixture may further contain other components, if necessary.
  • the blending ratio of asphalt in asphalt mixtures containing conventional aggregate and asphalt is usually determined from “blending design of asphalt composition” described in “Pave design design and construction guidelines” issued by Japan Road Association. It is decided according to the optimal asphalt amount to be In the present specification, the above-mentioned optimum asphalt amount corresponds to the total amount of asphalt, thermoplastic elastomer and polyester. Therefore, in general, it is preferable to set the optimum asphalt content to the total blending amount of asphalt, thermoplastic elastomer and polyester. However, the method does not have to be limited to the method described in “Pave design design guidelines”, and may be determined by another method.
  • the mixing method of the asphalt, the thermoplastic elastomer, the polyester, and the aggregate in step 1 is not particularly limited, and may be manufactured by any method, and usually, a method of manufacturing an asphalt mixture containing the aggregate and the asphalt You may do according to.
  • Asphalt, thermoplastic elastomer, and polyester may be premixed prior to adding the aggregate.
  • the temperature at which asphalt, thermoplastic elastomer and polyester are mixed is preferably 130 ° C. or more, more preferably 150 ° C. or more, and preferably 230 ° C. or less, more preferably Is 200 ° C. or less.
  • the stirring speed at the time of mixing is preferably 100 rpm or more, more preferably 200 rpm or more, and preferably 1000 rpm or less, more preferably 800 rpm or less.
  • Step 1 is a step of mixing the heated aggregate, the above-mentioned asphalt, the thermoplastic elastomer, and the polyester.
  • a specific manufacturing method there can be mentioned a method of manufacturing an asphalt mixture which is called a conventional plant mix system, a premix system or the like. All are methods of adding asphalt, a thermoplastic elastomer, and polyester to the heated aggregate.
  • the addition method is, for example, a premix system in which asphalt, a thermoplastic elastomer, and a polyester are previously dissolved, from the viewpoint of achieving both marshall stability as an index of the strength of the specimen and a flow value as an index of toughness of the specimen.
  • a plant mix method in which a modified asphalt in which a thermoplastic elastomer is dissolved is added to asphalt, and then polyester is added.
  • the plant mix system is preferable. More specifically, in the method of producing an asphalt mixture, in the mixing step, preferably, (I) Add and mix asphalt and thermoplastic elastomer to heated aggregate, then add and mix polyester, or (Ii) Add and mix asphalt, thermoplastic elastomer and polyester simultaneously to the heated aggregate. Among these, the method (i) is preferable.
  • the temperature of the heated aggregate is preferably a temperature higher than the softening point of the polyester, from the viewpoint of achieving both the excellent stability of the asphalt pavement layer and the stress relaxation property, preferably 130 ° C. or more, more preferably Is preferably 150 ° C. or more, more preferably 170 ° C. or more, and preferably 230 ° C. or less, more preferably 210 ° C. or less, still more preferably 200 ° C. or less.
  • the mixing temperature is preferably a temperature higher than the softening point of polyester, preferably 130 ° C. or more, more preferably 150 ° C. or more, still more preferably 170 ° C. or more, still more preferably 175 ° C. or more Preferably it is 230 degrees C or less, More preferably, it is 210 degrees C or less, More preferably, it is 200 degrees C or less.
  • the mixing time in step 1 is, for example, 30 seconds or more, preferably 1 minute or more, more preferably 2 minutes or more, still more preferably 5 minutes or more, and the upper limit of the time is not particularly limited, for example, about 30 minutes. is there.
  • step 1 from the viewpoint of achieving both the excellent stability and the stress relaxation property of the asphalt pavement material layer, after the above mixing, there is a step of holding the obtained mixture at a temperature higher than the softening point of the polyester.
  • the mixture may be further mixed, as long as the temperature is equal to or higher than the above temperature.
  • the mixing temperature is preferably a temperature higher than the softening point of the polyester, more preferably 130 ° C. or more, still more preferably 150 ° C. or more, still more preferably 170 ° C. or more, still more preferably 175 ° C. or more And preferably 230 ° C. or less, more preferably 210 ° C. or less, still more preferably 200 ° C. or less.
  • the holding time in the step of holding is preferably 0.5 hours or more, more preferably 1 hour or more, and still more preferably 1.5 hours or more, and the upper limit of the time is not particularly limited, for example, about 5 hours. is there.
  • Step 2 is a step of applying the asphalt mixture obtained in step 1 to a road to form an asphalt pavement layer.
  • the asphalt pavement layer is preferably a base layer or a surface layer.
  • the asphalt mixture may be compacted by the same method, with the same construction as usual.
  • the compaction temperature when used as a heated asphalt mixture is preferably a temperature higher than the softening point of polyester, preferably 100 ° C. or more, more preferably 120 ° C. or more, still more preferably 130 ° C. or more, and preferably It is 200 ° C. or less, more preferably 180 ° C. or less.
  • Step 1 mixing asphalt, thermoplastic elastomer, polyester, and aggregate, obtaining an asphalt mixture
  • Step 2 applying the asphalt mixture obtained in the above step 1 to a road for asphalting
  • a method of paving a road comprising the step of forming a pavement layer,
  • the polyester has a softening point of 90 ° C. or more and 140 ° C. or less, and a glass transition point of 40 ° C. or more and 80 ° C.
  • a method of paving a road wherein the ratio of the polyester is more than 17 parts by mass and not more than 50 parts by mass with respect to 100 parts by mass of the asphalt.
  • ⁇ 4> A carboxylic acid containing 50 mol% or more of one or more selected from the group consisting of a constituent unit derived from an alcohol component containing 60 mol% or more of an alkylene oxide adduct of bisphenol A and the polyester
  • ⁇ 5> The method of paving a road according to any one of ⁇ 1> to ⁇ 4>, wherein the polyester contains 50 mol% or more of an aromatic dicarboxylic acid compound in a carboxylic acid component.
  • thermoplastic elastomer is a styrene / butadiene block copolymer, a styrene / butadiene / styrene block copolymer, a styrene / butadiene random copolymer, a styrene / isoprene block copolymer, a styrene / isoprene / styrene block copolymer Any of ⁇ 1> to ⁇ 5> which is at least one selected from the group consisting of a polymer, a styrene / isoprene random copolymer, an ethylene / vinyl acetate copolymer, and an ethylene / acrylic acid ester copolymer How to pave the road described.
  • the thermoplastic elastomer is a styrene / butadiene block copolymer, a styrene / butadiene / styrene block copolymer, a styrene / butadiene random copolymer, a styrene / isoprene block copolymer, a styrene / isoprene / styrene block copolymer
  • the road paving method according to any one of ⁇ 1> to ⁇ 6>, which is at least one selected from the group consisting of a polymer and a styrene / isoprene random copolymer.
  • the polyester has a softening point of 90 ° C. or more and 140 ° C. or less, and a glass transition point of 40 ° C. or more and 80 ° C. or less,
  • the asphalt composition whose ratio of the said polyester is 17 mass parts or more and 50 mass parts or less with respect to 100 mass parts of asphalt.
  • the thermoplastic elastomer is a styrene / butadiene block copolymer, a styrene / butadiene / styrene block copolymer, a styrene / butadiene random copolymer, a styrene / isoprene block copolymer, a styrene / isoprene / styrene block copolymer ⁇ 8> to ⁇ 12>, which is at least one selected from the group consisting of a polymer, a styrene / isoprene random copolymer, an ethylene / vinyl acetate copolymer, and an ethylene / acrylic acid ester copolymer
  • the asphalt composition as described in any one.
  • thermoplastic elastomer is a styrene / butadiene block copolymer, a styrene / butadiene / styrene block copolymer, a styrene / butadiene random copolymer, a styrene / isoprene block copolymer, a styrene / isoprene / styrene block copolymer
  • An asphalt mixture comprising the asphalt composition according to any one of ⁇ 8> to ⁇ 14> and an aggregate. Use of the asphalt composition according to any one of ⁇ 16> ⁇ 8> to ⁇ 14> for road pavement. Use of the asphalt mixture according to any one of ⁇ 17> and ⁇ 15> for road pavement.
  • Example 1 9200 g of Carretera aggregate (2300 g of aggregate Grava, 2300 g of aggregate Sello, 4600 g of aggregate Arena (see below for the composition of the aggregate)) preheated to 190 ° C. are put in a mixer for asphalt and 30 at 190 ° C. Mixed for a second. Then, 660 g of modified asphalt containing 2.2% by mass of SBS was added, and mixed for 1 minute in an asphalt mixer. Next, 165 g of resin A-1 was added, mixed for 1 minute, and stored at 180 ° C. for 2 hours to obtain an asphalt mixture.
  • Examples 2 to 4 A specimen was obtained in the same manner as in Example 1 except that the components of the types and amounts shown in Tables 2 and 3 were used. Various evaluation tests were conducted, and the results are shown in Table 3.
  • Comparative Examples 1 to 3 A specimen was obtained in the same manner as in Example 1 except that the components of the types and amounts shown in Tables 2 and 3 were used. Various evaluation tests were conducted, and the results are shown in Table 3.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Road Paving Structures (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne un procédé de revêtement de route qui permet de créer une couche de matériau de revêtement d'asphalte capable d'obtenir simultanément des caractéristiques de stabilité et de relaxation de contrainte supérieures. Ce procédé de revêtement de route comprend : une étape 1 permettant obtenir un mélange d'asphalte par le mélange d'asphalte, d'un élastomère thermoplastique, d'un polyester et d'un agrégat ; et une étape 2 permettant de former une couche de matériau de revêtement d'asphalte en appliquant le mélange d'asphalte obtenu dans l'étape 1 sur une route, le polyester présentant un point de ramollissement de 90 à 140 °C et une température de transition vitreuse de 40 à 80 °C, et la proportion du polyester étant supérieure à 17 parties en masse mais pas supérieure à 50 parties en masse par rapport à 100 parties en masse de l'asphalte.
PCT/JP2018/026720 2017-07-18 2018-07-17 Procédé de revêtement de route WO2019017335A1 (fr)

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EP18834907.0A EP3656920A4 (fr) 2017-07-18 2018-07-17 Procédé de revêtement de route
US16/631,087 US11708669B2 (en) 2017-07-18 2018-07-17 Road paving method

Applications Claiming Priority (4)

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JP2017139243 2017-07-18
JP2017-139243 2017-07-18
JP2018-134130 2018-07-17
JP2018134130A JP6787588B2 (ja) 2017-07-18 2018-07-17 道路の舗装方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4116491A4 (fr) * 2020-03-06 2024-03-27 Kao Corp Composition d'asphalte

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06116500A (ja) * 1992-10-02 1994-04-26 Elf Atochem Japan Kk 改良された舗装用アスファルト組成物
JP2000169208A (ja) 1998-11-30 2000-06-20 Mi Tec:Kk 廃トナー含有舗装材
JP2013222044A (ja) * 2012-04-16 2013-10-28 Kao Corp トナー用結着樹脂

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06116500A (ja) * 1992-10-02 1994-04-26 Elf Atochem Japan Kk 改良された舗装用アスファルト組成物
JP2000169208A (ja) 1998-11-30 2000-06-20 Mi Tec:Kk 廃トナー含有舗装材
JP2013222044A (ja) * 2012-04-16 2013-10-28 Kao Corp トナー用結着樹脂

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3656920A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4116491A4 (fr) * 2020-03-06 2024-03-27 Kao Corp Composition d'asphalte

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