WO2019017334A1 - Composition d'asphalte - Google Patents

Composition d'asphalte Download PDF

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Publication number
WO2019017334A1
WO2019017334A1 PCT/JP2018/026719 JP2018026719W WO2019017334A1 WO 2019017334 A1 WO2019017334 A1 WO 2019017334A1 JP 2018026719 W JP2018026719 W JP 2018026719W WO 2019017334 A1 WO2019017334 A1 WO 2019017334A1
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WO
WIPO (PCT)
Prior art keywords
asphalt
polyester
styrene
less
mass
Prior art date
Application number
PCT/JP2018/026719
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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 EP18835024.3A priority Critical patent/EP3656821B1/fr
Priority to CN201880047294.XA priority patent/CN110914367B/zh
Priority to SG11202000439SA priority patent/SG11202000439SA/en
Priority to ES18835024T priority patent/ES2958615T3/es
Priority to BR112020000878-8A priority patent/BR112020000878B1/pt
Priority to US16/630,992 priority patent/US11168215B2/en
Priority claimed from JP2018134127A external-priority patent/JP6800919B2/ja
Publication of WO2019017334A1 publication Critical patent/WO2019017334A1/fr

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Classifications

    • 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
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08L9/06—Copolymers with styrene
    • 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
    • E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre

Definitions

  • the present invention relates to asphalt compositions used in the paving of roads, asphalt mixtures, and methods of making asphalt mixtures.
  • asphalt paving with asphalt composition is carried out ing.
  • the asphalt pavement has a good hardness and durability because the road surface is formed by an asphalt mixture in which aggregates are joined by asphalt.
  • 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 pavement material mixes the toner, which is waste, to provide a pavement material excellent in flow resistance, abrasion resistance and crack resistance, and reuses the waste toner which has been conventionally treated as industrial waste. It is stated that.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2000-169208
  • An embodiment of the present invention relates to the following [1] to [3].
  • It contains asphalt, thermoplastic elastomer and 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 asphalt composition whose ratio of the said polyester is 1 mass part or more and 17 mass parts or less with respect to 100 mass parts of asphalt.
  • An asphalt mixture comprising the asphalt composition according to [1] and an aggregate.
  • a method for producing an asphalt mixture which comprises the steps of mixing heated aggregate, asphalt, a thermoplastic elastomer, and polyester, The polyester has a softening point of 90 ° C.
  • an embodiment of the present invention relates to an asphalt composition excellent in the durability of a pavement surface after construction, an asphalt mixture, and a method for producing an asphalt mixture.
  • An embodiment of the present invention relates to the aforementioned [1] to [3]. According to an embodiment of the present invention, it is possible to provide an asphalt composition, an asphalt mixture, and a method for producing an asphalt mixture, which are excellent in the durability of the pavement surface after construction.
  • An asphalt composition according to an embodiment of the present invention (hereinafter, also simply referred to as “asphalt composition”) comprises asphalt, a thermoplastic elastomer and a polyester. Then, 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. Furthermore, the ratio of polyester is 1 part by mass or more and 17 parts by mass or less with respect to 100 parts by mass of asphalt. According to the above, an asphalt composition having excellent durability of the pavement surface after construction (hereinafter, also simply referred to as "durability”) can be obtained. Furthermore, this technology can be applied to provide asphalt mixtures and methods of making asphalt mixtures.
  • 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. And, while the polyester has a softening point of a predetermined value or less and a glass transition point of a range of a predetermined value or less, it is a bone which could not be realized only by the thermoplastic elastomer while maintaining the flexibility of the thermoplastic elastomer. It is considered that the flow resistance is improved by imparting the effect of securing the material to asphalt, and the durability of the paved surface after construction is improved.
  • 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.
  • an alkyl ester of the carboxylic acid for example, an alkyl group having 1 to 3 carbon atoms
  • the 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.
  • asphalt for example, various asphalts can be used.
  • straight asphalt which is petroleum asphalt for paving
  • 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, and 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 content of asphalt in the asphalt composition is preferably 60% by mass or more, more preferably 70% by mass or more, still more preferably 75% by mass or more, still more preferably 80% by mass or more, and preferably 98% by mass. % Or less, more preferably 96% by mass or less, still more preferably 95% 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 / acrylic
  • thermoplastic elastomers As a commercial item of ethylene / acrylic acid ester copolymer, "Elvaroy" (made by Dupont company) is mentioned, for example.
  • styrene / butadiene block copolymer As a commercial item of ethylene / acrylic acid ester copolymer, "Elvaroy” (made by Dupont company) is mentioned, for example.
  • thermoplastic elastomers from the viewpoint of further improving the durability, styrene / butadiene block copolymer, styrene / butadiene / styrene block copolymer, styrene / butadiene random copolymer, styrene / isoprene block copolymer Styrene / isoprene / styrene block copolymers and styrene / isoprene random copolymers are preferable, and styrene
  • the content of the thermoplastic elastomer in the asphalt composition is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, still more preferably 1% by mass or more, from the viewpoint of further improving the durability.
  • the content is preferably 2% by mass or more, and preferably 30% by mass or less, more preferably 20% by mass or less, still more preferably 10% by mass or less, and still more preferably 5% 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, and further preferably, with respect to 100 parts by mass of asphalt from the viewpoint of further improving the durability. Is 1 part by mass or more, more preferably 2 parts by mass or more, and preferably 30 parts by mass or less, 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.
  • the binder mixture include straight asphalt modified with a thermoplastic elastomer (hereinafter, also referred to as "modified asphalt”) and the like.
  • polyester preferably includes 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.
  • the polyester according to the first embodiment contains the aromatic dicarboxylic acid compound in an amount of 50 mol% or more in the carboxylic acid component, from the viewpoint of further improving the durability.
  • the polyester according to the second embodiment contains the aliphatic dicarboxylic acid compound in an amount of 50% by mole or more in the carboxylic acid component, from the viewpoint of further improving the durability.
  • Alcohol component examples include diols and polyhydric alcohols having a valence of 3 to 8. Examples of the alcohol component include aliphatic diols, aromatic diols, and trivalent or higher polyhydric alcohols. These alcohol components can be used alone or in combination of two or more.
  • the alcohol component preferably contains an alkylene oxide adduct of bisphenol A from the viewpoint of obtaining excellent durability, and more preferably a compound of formula (I):
  • OR 1 and R 1 O are alkylene oxides
  • R 1 is an alkylene group having 2 or 3 carbon atoms
  • x and y are positive numbers indicating the average addition mole number of the alkylene oxide
  • x and y are positive numbers indicating the average addition mole number of the alkylene oxide
  • 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, it interacts with the thermoplastic elastomer which is an asphalt modifying component and is adsorbed to the aggregate It is considered to be a thing.
  • the flow resistance is improved by imparting the effect of anchoring the aggregate to asphalt, which could not be realized by the thermoplastic elastomer alone while maintaining the flexibility of the thermoplastic elastomer, and the pavement surface after construction It is believed that the durability of the Among thermoplastic elastomers, in particular, SBS and SBR described later are likely to exhibit this effect.
  • Examples of the alkylene oxide adduct of bisphenol A represented by the formula (I) include a propylene oxide adduct of bisphenol A [2,2-bis (4-hydroxyphenyl) propane], and an ethylene oxide adduct of bisphenol A Be Among these, a combination of a propylene oxide adduct of bisphenol A and an ethylene oxide adduct of bisphenol A is preferred.
  • the amount of the alkylene oxide adduct of bisphenol A in the alcohol component is preferably 65% by mole or more from the viewpoint of enhancing melt dispersibility on asphalt and enhancing affinity with the thermoplastic elastomer to obtain excellent durability. More preferably, 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 5/95 or more, more preferably 10/90 or more, and the melt dispersibility on asphalt It is preferably 50/50 or less, more preferably 40/60 or less, still more preferably 30/70 or less, from the viewpoint of enhancing the affinity to the thermoplastic elastomer and obtaining excellent durability.
  • 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 aliphatic dicarboxylic acid compounds, aromatic 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.
  • the carbon number of the main chain 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 further improving the durability.
  • 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, dodecanedioic acid, Succinic acid substituted by an alkyl group having 1 to 20 carbon atoms or an alkenyl group having 2 to 20 carbon atoms, or anhydrides thereof, alkyl esters thereof (for example, 1 to 3 carbon atoms of an alkyl group) Can be mentioned.
  • substituted succinic acid examples include dodecyl succinic acid, dodecenyl succinic acid and octenyl succinic acid.
  • aliphatic dicarboxylic acid compounds fumaric acid, maleic acid and adipic acid are preferable, and adipic acid is more preferable.
  • the content of the aliphatic dicarboxylic acid compound is preferably 1% by mol or more, more preferably 5% by mol or more, and further preferably from the viewpoint of enhancing the flexibility of the polyester in the carboxylic acid component to further improve the durability. Is 10 mol% or more, and preferably 30 mol% or less, more preferably 25 mol% or less.
  • aromatic dicarboxylic acid compound examples include terephthalic acid, phthalic acid, isophthalic acid, naphthalenedicarboxylic acid, or anhydrides thereof, alkyl esters thereof (for example, 1 to 3 carbon atoms of alkyl group). .
  • terephthalic acid and isophthalic acid are preferable.
  • terephthalic acid is preferable from the viewpoint of further improving the durability.
  • the content of the aromatic dicarboxylic acid compound is preferably 65% by mol or more, more preferably 70% by mol or more in the carboxylic acid component from the viewpoint of enhancing the affinity between the thermoplastic elastomer and the polyester and obtaining excellent durability. And preferably 99 mol% or less, more preferably 95 mol% or less, and still more preferably 90 mol% or less.
  • the trivalent to hexavalent polyvalent carboxylic acid is preferably a trivalent carboxylic acid.
  • trivalent to hexavalent polyhydric carboxylic acids 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 carbon number of the main chain of the aliphatic dicarboxylic acid is preferably 3 or more, and preferably 10 or less, more preferably 6 or less, more preferably 4 or less, from the viewpoint of further improving the durability.
  • the content of the aliphatic dicarboxylic acid compound is preferably 65 mol% or more, more preferably 70 mol% or more, and still more preferably 75 mol% or more in the carboxylic acid component from the viewpoint of further improving the durability.
  • it is 99 mol% or less, More preferably, it is 95 mol% or less, More preferably, it is 90 mol% or less.
  • the content of the aromatic dicarboxylic acid compound is preferably 1 mol% or more, more preferably 5 mol% or more, still more preferably 10 mol% or more in the carboxylic acid component from the viewpoint of obtaining excellent durability. Preferably it is 30 mol% or less, More preferably, it is 25 mol% or less.
  • 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 softening point of the polyester is 90 ° C. or more, more preferably 95 ° C. or more, more preferably 100 ° C. or more, and 140 ° C. or less, preferably 130 ° C. or less, from the viewpoint of obtaining durability.
  • it is 125 degrees C or less, More preferably, it is 120 degrees C or less, More preferably, it is 115 degrees C or less.
  • the acid value of the polyester is preferably 2 mg KOH / g or more, more preferably 3 mg KOH / g or more, still more preferably 5 mg KOH / g or more, from the viewpoint of promoting adsorption to the aggregate and further improving the durability. From the viewpoint of enhancing the water resistance of the pavement, it is preferably 30 mg KOH / g or less, more preferably 20 mg KOH / g or less, and more preferably 18 mg KOH / g or less.
  • the hydroxyl value of the polyester is preferably 1 mg KOH / g or more, more preferably 2 mg KOH / g or more, still more preferably 5 mg KOH / g or more, and further preferably 10 mg KOH / g or more, from the viewpoint of further improving the durability. It is preferably 70 mg KOH / g or less, more preferably 50 mg KOH / g or less, further preferably 30 mg KOH / g or less, still more preferably 20 mg KOH / g or less, further preferably less than 20 mg KOH / g, further preferably 18 mg KOH / g or less.
  • the glass transition point of the polyester is 40 ° C. or more, more preferably 45 ° C. or more, and 80 ° C. or less, more preferably, from the viewpoint of obtaining durability and from the viewpoint of improving the flow resistance at high temperatures. It is 70 ° C. or less, more preferably 60 ° C. or less.
  • a softening point, an acid value, a hydroxyl value, and a glass transition point can be measured by the method as described in an Example.
  • a softening point, an acid value, a hydroxyl value, and a glass transition point can be adjusted with a raw material monomer composition, molecular weight, a catalyst amount, or reaction conditions.
  • 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 1 part by mass or more, preferably 2 parts by mass or more, more preferably 3 parts by mass or more, with respect to 100 parts by mass of asphalt, from the viewpoint of improving durability. 17 parts by mass or less, preferably 15 parts by mass or less, more preferably 12 parts by mass or less, more preferably 10 parts by mass or less, still more preferably 7 parts by mass or less, more preferably 5 parts by mass or less, more preferably 4 parts by mass It is below.
  • the asphalt composition may contain a dispersant.
  • the dispersant is preferably soluble in asphalt and has an affinity to polyester.
  • surfactant such as a polymer dispersing agent, polyoxyethylene alkylamine, an alkanolamine, etc. can be mentioned, for example.
  • the polymer dispersant for example, polyamidoamine and its salt, polycarboxylic acid and its salt, high molecular weight unsaturated acid ester, modified polyurethane, modified polyester, modified poly (meth) acrylate, (meth) acrylic copolymer And naphthalene sulfonic acid formalin condensates and the like. These dispersants may be used alone or in combination of two or more.
  • the dispersant is preferably a polymer dispersant from the viewpoint of improving high-temperature storage stability.
  • the "polymer dispersant” in the present invention means a dispersant having a weight average molecular weight of 1,000 or more. Although depending on the type of polymer, the weight average molecular weight is preferably 2,000 or more, more preferably 4,000 or more, and preferably 80,000 or less, more preferably 40,000 or less.
  • the dispersant preferably has a basic functional group.
  • the basic functional group means a group such that the pKa of the conjugate acid is -3 or more.
  • a basic functional group an amino group, an imino group, a quaternary ammonium group is mentioned, for example.
  • the base number of the dispersant is preferably 10 mg KOH / g or more, more preferably 20 mg KOH / g or more, still more preferably 30 mg KOH / g or more, and preferably 150 mg KOH / g or less, more preferably 120 mg KOH / g or less, further Preferably it is 100 mgKOH / g or less.
  • the base number is measured by the method specified in JIS K 7237: 1995.
  • dispersants include, for example, “Disk” series “byk-101”, “byk-130”, “byk-161”, “byk-162”, “byk-170”, “byk-2020”, “Byk-2164", “byk-LPN 21324" (above, made by BIC Chemie (BYK)); “Sol Sparse” series of “9000”, “11200”, “13240”, “13650”, “13940”, “17000” “18000”, “24000”, “22000”, “32000”, “38500”, “71000” (all available from Lubrisol Corporation); “Arisper” series of “PB 821”, “PB 822”, “PB 880”, “ “PB881” (above, made by Ajinomoto Fine Techno Co., Ltd.); 47 “,” 48 “,” 49 “,” 4010 “,” 4047 “,” 4050 “,” 4165 “,” 5010 "(manufactured by BASF Corporation);” Floren TG-710 "(manufactured by Kyoe
  • the content of the dispersant is preferably 1 part by mass or more, more preferably 3 parts by mass or more, still more preferably 4 parts by mass or more, and preferably 80 parts by mass or less, with respect to 100 parts by mass of polyester.
  • the amount is preferably 60 parts by mass or less, more preferably 40 parts by mass or less, still more preferably 30 parts by mass or less, and still more preferably 20 parts by mass or less.
  • An asphalt mixture according to an embodiment of the present invention contains the aforementioned asphalt composition and aggregate. That is, the asphalt mixture contains asphalt, thermoplastic elastomer, polyester, and aggregate.
  • the content of the asphalt composition 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, from the viewpoint of further improving the durability, and preferably It is 15% by mass or less, more preferably 10% by mass or less, more preferably 8% by mass or less.
  • 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 diameter 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 diameter 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, from the viewpoint of improving the dry strength.
  • 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 preferable from the viewpoint of improving the dry strength.
  • 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 1,000 parts by mass or more, more preferably 1,200 parts by mass or more, more preferably 1,400 parts by mass with respect to 100 parts by mass in total of asphalt, thermoplastic elastomer and polyester. It is the above, and preferably 3,000 parts by mass or less, more preferably 2,500 parts by mass or less, and still more preferably 2,000 parts by mass or less.
  • the asphalt mixture of an example is, for example, 30% by volume to less than 45% by volume coarse aggregate, 30% by volume to 50% by volume fine aggregate, and 5% by volume to 10% by volume asphalt composition Containing substances (fine particle size asphalt).
  • the asphalt mixture of an 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 composition Containing substances (dense 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 composition Containing substances (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 used in accordance with the optimum 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 other methods.
  • the method for producing an asphalt mixture according to an embodiment of the present invention includes the step of mixing the heated aggregate, asphalt, the thermoplastic elastomer, and the above-described polyester, from the viewpoint of further improving the durability.
  • a method of manufacturing an asphalt mixture which is called a conventional plant mix system, a premix system or the like, may be mentioned. All are methods of adding asphalt, a thermoplastic elastomer, and polyester to the heated aggregate.
  • the method of addition is, for example, asphalt, a thermoplastic elastomer, a premix method in which polyester is previously dissolved, or a plant mix method in which a modified asphalt in which thermoplastic elastomer is dissolved in asphalt is added and then polyester is added.
  • the premix system is preferable.
  • the mixing step 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.
  • the method (i) is preferable.
  • the temperature of the heated aggregate is preferably higher than the softening point of the polyester, preferably 130 ° C. or more, more preferably 150 ° C. or more, still more preferably 170 ° C. or more, from the viewpoint of durability.
  • the temperature is more preferably 180 ° C. or more, and preferably 230 ° C. or less, more preferably 210 ° C. or less, still more preferably 200 ° C. or less from the viewpoint of preventing thermal deterioration of asphalt.
  • the mixing temperature is preferably a temperature higher than the softening point of the polyester, preferably 130 ° C. or more, more preferably 150 ° C. or more, still more preferably 170 ° C. or more, still more preferably 180 ° C. or more
  • the temperature is preferably 230 ° C. or less, more preferably 210 ° C. or less, and still more preferably 200 ° C. or less.
  • the mixing time in the mixing step is, for example, 30 seconds or more, preferably 1 minute or more, more preferably 2 minutes or more, more preferably 5 minutes or more, and the upper limit of the time is not particularly limited, for example, about 30 minutes It is.
  • the method for producing an asphalt mixture has a step of holding the obtained mixture at a temperature higher than the softening point of the polyester after the mixing step.
  • 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, preferably 130 ° C. or more, more preferably 150 ° C. or more, still more preferably 170 ° C. or more, still more preferably 180 ° C. or more
  • the temperature is preferably 230 ° C. or less, more preferably 210 ° C.
  • 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.
  • Asphalt mixtures are used for road paving.
  • the road paving method preferably comprises the steps of applying the aforementioned asphalt mixture to form an asphalt paving layer.
  • the asphalt pavement layer is preferably a base layer or a surface layer.
  • the asphalt mixture may be compacted by the same method using known construction machines.
  • 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.
  • Asphalt containing thermoplastic elastomer and 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 asphalt composition whose ratio of the said polyester is 1 mass part or more and 17 mass parts or less with respect to 100 mass parts of asphalt.
  • the polyester contains an aromatic dicarboxylic acid compound in an amount of 50 mol% or more in a carboxylic acid component.
  • the asphalt composition as described in ⁇ 2> in which ⁇ 4> said polyester contains an aliphatic dicarboxylic acid compound 50 mol% or more 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 ⁇ 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 cop
  • 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
  • An asphalt mixture comprising the asphalt composition according to any one of ⁇ 1> to ⁇ 7> and an aggregate.
  • a method for producing an asphalt mixture which comprises the steps of mixing heated aggregate, asphalt, a thermoplastic elastomer, and 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 manufacturing method of the asphalt mixture whose ratio of the said polyester is 1 mass part or more and 17 mass parts or less with respect to 100 mass parts of asphalt.
  • ⁇ 14> The method for producing an asphalt mixture according to any one of ⁇ 9> to ⁇ 13>, wherein the polyester has a hydroxyl value of 1 mg KOH / g to 70 mg KOH / g.
  • 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 ⁇ 9> to ⁇ 14>, 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 ester copolymer
  • the manufacturing method of the asphalt mixture as described in any.
  • thermoplastic elastomer is styrene / butadiene block copolymer, styrene / butadiene / styrene block copolymer, styrene / butadiene random copolymer, styrene / isoprene block copolymer, styrene / isoprene / styrene block co-polymer
  • Production Example A5 (Resin A-5) The alcohol component of polyester shown in Table 1 and terephthalic acid are placed in a 5-liter four-necked flask equipped with a thermometer, a stainless steel stirring rod, a downflow condenser and a nitrogen inlet tube, and 20 g of ethyl (hexanoic acid) and 2 g of gallic acid are added, heated to 235 ° C. in 10 hours in a mantle heater and held for 5 hours after reaching 235 ° C., then 1 hour at 8.0 kPa A vacuum reaction was performed.
  • ethyl hexanoic acid
  • Example A1 As a binder mixture, 2200 g of SBS 3% by mass modified asphalt (Mexico FESPA) heated to 180 ° C. is placed in a 3 L stainless steel container and stirred at 100 rpm, and the dispersant “Sorspurse 11200” (Lubrisol Co., Ltd.) A polymer dispersant having a basic functional group, 3.4 g of base number 37 mg KOH / g, was added. Thereafter, 68 g of polyester was gradually added, and the mixture was stirred at 500 rpm for 2 hours to prepare asphalt composition AS-1. The component ratio of the produced asphalt composition AS-1 is shown in Table 2.
  • the La Vega (Mexico) aggregate (the composition of the aggregate is as described below) heated to 190 ° C. was put into a mixer for asphalt, and mixed at 190 ° C. for 30 seconds.
  • 552 g of the asphalt composition AS-1 was added and mixed in an asphalt mixer for 2 minutes.
  • the obtained asphalt mixture was stored at 180 ° C. for 2 hours, and then put in a gyro compactor (circular molding machine Cooper load 600 kPa, 100 rotation pressure) to obtain a specimen.
  • gyro compactor circular molding machine Cooper load 600 kPa, 100 rotation pressure
  • Example A2 to A6, A8, Comparative Examples A1 to A4 A specimen was obtained in the same manner as in Example A1, except that the components were of the types and amounts shown in Tables 2 and 3. Various evaluation tests were conducted, and the results are shown in Table 3.
  • Example A7 As a binder mixture, 2200 g of SBS 2.2 mass% containing modified asphalt (Mexico ARO Co., Ltd.) heated to 180 ° C. is placed in a 3 L stainless steel container and stirred at 100 rpm, and the dispersant “Sorspurse 11200” (Lubrisol) is contained therein. Company-made) 3.4g was added. Thereafter, 68 g of polyester (resin A-1) was gradually added, and the mixture was stirred at 500 rpm for 2 hours to prepare an asphalt composition AS-7. The component ratio of the produced asphalt composition AS-7 is shown in Table 2.
  • Example B1 Place Carretera aggregate (2300 g of coarse aggregate Grava aggregate Sello 2300 g, fine aggregate Arena 4600 g (the composition of the aggregate is the same as described above)) preheated to 190 ° C. into the asphalt mixer and continue at 190 ° C. for 30 seconds Mixed. Then, 640 g of SBS 2.2% by mass containing modified asphalt (Mexico ARO Co., Ltd.) was added, and mixed for 1 minute in an asphalt mixer. Next, 20 g of resin A-1 was added and mixed for 1 minute. The obtained asphalt mixture was stored at 180 ° C. for 2 hours, and then put in a gyro compactor (circular molding machine Cooper load 600 kPa, 100 rotation pressure) to obtain a specimen. The durability test was conducted, and the displacement amount at 20,000 tire passes was 6 mm.
  • a gyro compactor circular molding machine Cooper load 600 kPa, 100 rotation pressure
  • Comparative example B1 Place Carretera aggregate (2300 g of coarse aggregate Grava aggregate Sello 2300 g, fine aggregate Arena 4600 g (as described above for aggregate composition design)) heated to 190 ° C into asphalt mixer and mix at 190 ° C for 30 seconds did. Then, 660 g of SBS 2.2% modified asphalt was added, and mixed for 1 minute in an asphalt mixer. The obtained asphalt mixture was stored at 180 ° C. for 2 hours, and then put in a gyro compactor (circular molding machine Cooper load 600 kPa, 100 rotation pressure) to obtain a specimen. The durability test was conducted, and the displacement amount at 20,000 tire passes was 10 mm.

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

Abstract

La présente invention concerne une composition d'asphalte ayant une excellente durabilité après séchage, un mélange d'asphalte, et un procédé de production du mélange d'asphalte. [1] Cette composition d'asphalte contient de l'asphalte, un élastomère thermoplastique et un polyester, le polyester ayant un point de ramollissement de 90 à 140 °C et un point de transition vitreuse de 40 à 80 °C, et la proportion du polyester est de 1 à 17 parties en masse par rapport à 100 parties en masse de l'asphalte. [2] Ce mélange d'asphalte contient un agrégat et la composition d'asphalte décrite dans [1]. [3] Le procédé de production d'un mélange d'asphalte comprend une étape de mélange d'asphalte, d'un élastomère thermoplastique et d'un polyester, le polyester ayant un point de ramollissement de 90 à 140 °C et un point de transition vitreuse de 40 à 80 °C, et la proportion du polyester est de 1 à 17 parties en masse par rapport à 100 parties en masse de l'asphalte.
PCT/JP2018/026719 2017-07-18 2018-07-17 Composition d'asphalte WO2019017334A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP18835024.3A EP3656821B1 (fr) 2017-07-18 2018-07-17 Composition d'asphalte
CN201880047294.XA CN110914367B (zh) 2017-07-18 2018-07-17 沥青组合物
SG11202000439SA SG11202000439SA (en) 2017-07-18 2018-07-17 Asphalt composition
ES18835024T ES2958615T3 (es) 2017-07-18 2018-07-17 Composición asfáltica
BR112020000878-8A BR112020000878B1 (pt) 2017-07-18 2018-07-17 Composição asfáltica
US16/630,992 US11168215B2 (en) 2017-07-18 2018-07-17 Asphalt composition

Applications Claiming Priority (4)

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JP2017-139232 2017-07-18
JP2017139232 2017-07-18
JP2018-134127 2018-07-17
JP2018134127A JP6800919B2 (ja) 2017-07-18 2018-07-17 アスファルト組成物

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WO2021177444A1 (fr) * 2020-03-06 2021-09-10 花王株式会社 Composition d'asphalte
WO2021177443A1 (fr) * 2020-03-06 2021-09-10 花王株式会社 Composition d'asphalte
CN115011131A (zh) * 2022-07-20 2022-09-06 喜跃发国际环保新材料股份有限公司 一种低温抗裂沥青混合料及其制备方法

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JPH048766A (ja) * 1990-04-27 1992-01-13 Hitachi Chem Co Ltd アスフアルト組成物
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JP2005126998A (ja) * 2003-10-23 2005-05-19 Toa Doro Kogyo Co Ltd 道路舗装用組成物及びこれを用いた舗装体
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WO2021177444A1 (fr) * 2020-03-06 2021-09-10 花王株式会社 Composition d'asphalte
WO2021177443A1 (fr) * 2020-03-06 2021-09-10 花王株式会社 Composition d'asphalte
CN115244134A (zh) * 2020-03-06 2022-10-25 花王株式会社 沥青组合物
CN115244134B (zh) * 2020-03-06 2023-09-01 花王株式会社 沥青组合物
CN115011131A (zh) * 2022-07-20 2022-09-06 喜跃发国际环保新材料股份有限公司 一种低温抗裂沥青混合料及其制备方法
CN115011131B (zh) * 2022-07-20 2023-01-31 喜跃发国际环保新材料股份有限公司 一种低温抗裂沥青混合料及其制备方法

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