WO2024202337A1 - 道路補修材 - Google Patents

道路補修材 Download PDF

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Publication number
WO2024202337A1
WO2024202337A1 PCT/JP2023/046427 JP2023046427W WO2024202337A1 WO 2024202337 A1 WO2024202337 A1 WO 2024202337A1 JP 2023046427 W JP2023046427 W JP 2023046427W WO 2024202337 A1 WO2024202337 A1 WO 2024202337A1
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WIPO (PCT)
Prior art keywords
asphalt
mass
repair material
road repair
less
Prior art date
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PCT/JP2023/046427
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English (en)
French (fr)
Japanese (ja)
Inventor
雅義 吉田
玲児 菊池
信行 八幡
克美 横溝
勉 石垣
学 神尾
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Nippo Corp
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Nippo Corp
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Publication date
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Priority to JP2025509748A priority Critical patent/JPWO2024202337A1/ja
Publication of WO2024202337A1 publication Critical patent/WO2024202337A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • 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
    • C08K5/04—Oxygen-containing compounds
    • C08K5/10—Esters; Ether-esters
    • C08K5/101—Esters; Ether-esters of monocarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/02—Polyalkylene oxides
    • 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
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • 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
    • 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
    • E01C7/30—Coherent pavings made in situ made of road-metal and binders of road-metal and other binders, e.g. synthetic material, i.e. resin

Definitions

  • the present invention relates to a road repair material that can be applied at room temperature.
  • Asphalt mixtures containing cutback materials such as mineral oils are known as road repair materials for repairing potholes and other problems on asphalt roads. It is known that the strength of these asphalt mixtures increases as the cutback materials volatilize.
  • asphalt mixtures containing cement as described in Patent Documents 1 and 2, and these asphalt mixtures can be hardened by adding water.
  • Patent Document 3 discloses an asphalt pavement regeneration device, and with this regeneration device there is no need to heat and mix the asphalt mixture, but Patent Document 3 does not relate to road repair materials for repairing potholes, etc.
  • Asphalt mixtures that contain cutback materials such as mineral oil have the problem of emitting volatile organic compounds (VOCs), and when a bagged asphalt mixture is opened, it must be used up, and if it cannot be used up, it must be discarded.
  • VOCs volatile organic compounds
  • Road repair materials such as those described in Patent Documents 1 and 2 have the problem that they require water when used. Since water is not required for normal road repair work, water must be prepared separately in order to use these road repair materials, which can cause problems during construction. In addition, these road repair materials also absorb moisture and begin to harden after opening, so they must be used on the same day after opening.
  • the present invention aims to provide a new road repair material that can be applied at room temperature, emits virtually no VOCs, and can be used even after a period of time has passed since it was opened, as well as a method for producing the same.
  • a road repair material comprising asphalt, aggregate, and a softening agent, the softening agent comprising a fatty acid-based compound.
  • Aspect 2 The road repair material of claim 1, wherein the asphalt is a polymer-modified asphalt.
  • Aspect 3 The road repair material according to claim 1, wherein the asphalt is contained as an asphalt emulsion.
  • Aspect 4 The road repair material according to claim 3, wherein the asphalt emulsion comprises a polymer modified asphalt.
  • Aspect 5 The road repair material according to claim 1, wherein the content of recycled asphalt concrete aggregate is less than 20% by mass.
  • Aspect 7 The road repair material according to claim 1, wherein the softener comprises a fatty acid-based compound represented by the following general formula (1): R 1 -CO-(AO)m-OR 2 ...General formula (1) (In the formula, R 1 represents a linear or branched hydrocarbon group having 15 to 19 carbon atoms, R 2 represents either hydrogen or a linear or branched hydrocarbon group having 1 to 18 carbon atoms, AO represents a linear or branched alkylene oxide unit having 2 to 4 carbon atoms, and m represents the average number of moles added and is a number from 0 to 30.)
  • Aspect 8 The road repair material according to claim 1, wherein the fatty acid-based compound has an iodine value of 50 to 110.
  • Aspect 9 The road repair material according to aspect 1, comprising 10 parts by mass or more and 60 parts by mass or less of the softening agent relative to 100 parts by mass of the asphalt.
  • Aspect 10 The method for producing a road repair material according to any one of aspects 1 to 9, comprising mixing the asphalt, the aggregate, and the softening agent.
  • Aspect 11 The method for producing a road repair material according to claim 10, wherein the mixing is carried out at a temperature of 100° C. or less.
  • Aspect 12 The method for producing a road repair material according to aspect 10, wherein aggregate is mixed after the asphalt and the softening agent are mixed.
  • the present invention provides a new road repair material and its manufacturing method that can be applied at room temperature, emits virtually no VOCs, and can be used even after a period of time has passed since it was opened.
  • FIG. 1 is a diagram illustrating the penetration resistance test carried out in the examples.
  • FIG. 2 is a diagram illustrating the flow test carried out in the examples.
  • the road repair material of the present invention is a road repair material containing asphalt, aggregate, and a softening agent, and the softening agent contains a fatty acid-based compound.
  • this road repair material hardens when subjected to pressure. Unlike conventional repair materials, this road repair material does not require waiting for the cutback material to volatilize, and can be used immediately after being spread over potholes on asphalt roads, temporarily compacted with a shovel, and then compacted with a vehicle or plate. Without being bound by theory, it is believed that this is because when pressure is applied to the road repair material, which contains asphalt, aggregate, and softener, the aggregate interlocks better, increasing the contact area between the aggregates, and the softener separates from the asphalt, allowing it to harden quickly. It has also been found that the road repair material of the present invention does not harden until a large amount of pressure is applied, and therefore can remain usable even after a period of time has passed since it was opened.
  • the road repair material of the present invention can have a VOC concentration of 100 mg/L or less, 50 mg/L or less, 30 mg/L or less, 20 mg/L or less, 10 mg/L or less, or 5 mg/L or less when measured at 20°C in accordance with JIS K0125.
  • the road repair material of the present invention contains asphalt.
  • modified asphalt can be mentioned.
  • Modified asphalt can be blown asphalt, polymer modified asphalt modified with polymeric materials such as thermoplastic elastomers and thermoplastic resins, etc. It is preferable that the asphalt is contained as an asphalt emulsion. It is even more preferable that the asphalt emulsion contains polymer modified asphalt.
  • the asphalt preferably contains a thermoplastic elastomer.
  • examples of such asphalt compositions include straight asphalt (modified asphalt) modified with a thermoplastic elastomer.
  • Thermoplastic elastomers used in modified asphalt may be any thermoplastic elastomer commonly used in this field, including, for example, one or more of styrene/butadiene block copolymers, styrene/butadiene/styrene block copolymers, styrene/butadiene random copolymers, styrene/isoprene block copolymers, styrene/isoprene/styrene block copolymers, styrene/isoprene random copolymers, ethylene/vinyl acetate copolymers, ethylene/acrylic acid ester copolymers, etc.
  • the content of thermoplastic elastomer in the modified asphalt may be 0.1 mass% or more, 0.5 mass% or more, 1 mass% or more, 2 mass% or more, 3 mass% or more, 5 mass% or more, or 10 mass% or more, and may be 30 mass% or less, 20 mass% or less, 10 mass% or less, 5 mass% or less, 3 mass% or less, or 2 mass% or less, based on the total amount of modified asphalt.
  • the content of asphalt or straight asphalt in the modified asphalt may be 70% by mass or more, 80% by mass or more, 85% by mass or more, 90% by mass or more, 95% by mass or more, or 97% by mass or more, and may be 99.5% by mass or less, 99% by mass or less, 98% by mass or less, 97% by mass or less, 95% by mass or less, or 90% by mass or less, based on the total amount of modified asphalt.
  • the asphalt content in the road repair material of the present invention may be 2.0 mass% or more, 3.0 mass% or more, 4.0 mass% or more, or 5.0 mass% or more, and may be 20 mass% or less, 15 mass% or less, 10 mass% or less, 8.0 mass% or less, 5.0 mass% or less, or 4.0 mass% or less.
  • the road repair material of the present invention contains aggregate.
  • aggregate those generally used in this field can be used.
  • recycled aggregate or asphalt concrete recycled aggregate may be used as the aggregate, and these recycled aggregates may be 5% by mass or more, 10% by mass or more, 20% by mass or more, 30% by mass or more, or 40% by mass or more of the total aggregate, and may be 100% by mass or less, 90% by mass or less, 80% by mass or less, 70% by mass or less, or 60% by mass or less.
  • recycled aggregates may not be used substantially, for example, less than 20% by mass, 10% by mass or less, 5% by mass or less, or not at all in the entire road repair material.
  • the road repair material of the present invention preferably uses coarse aggregate and/or fine aggregate as the aggregate.
  • Coarse aggregate with a particle size of 2.36 mm or more and fine aggregate with a particle size of less than 2.36 mm can be used by selecting the particle size, mixing ratio, etc. from the viewpoint of interlocking between the coarse aggregates and fluidity.
  • Examples of coarse aggregate include No. 7 crushed stone with a particle size range of 2.36 mm or more and less than 4.75 mm, No. 6 crushed stone with a particle size range of 4.75 mm or more and less than 13.2 mm, No. 5 crushed stone with a particle size range of 13.2 mm or more and less than 19 mm, and No. 4 crushed stone with a particle size range of 19 mm or more and less than 31.5 mm.
  • Fine aggregates include, for example, fine aggregates smaller than 2.36 mm, such as river sand, dune sand, mountain sand, sea sand, crushed sand, fine sand, screenings, crushed stone dust, silica sand, artificial sand, glass cullet, and foundry sand.
  • the particle sizes of the above coarse and fine aggregates are as specified in JIS A5001-2008.
  • the aggregate content in the road repair material of the present invention may be 70% by mass or more, 75% by mass or more, 80% by mass or more, 85% by mass or more, or 90% by mass or more, or 97% by mass or less, 95% by mass or less, 93% by mass or less, 90% by mass or less, or 85% by mass or less.
  • the road repair material of the present invention can contain a fatty acid compound as a softening agent, which makes the road repair material of the present invention substantially free of VOC emissions and usable even after a period of time has passed since it was opened.
  • a fatty acid compound with an iodine value of 50 to 110 can be used.
  • the softener may be a combination of multiple fatty acid compounds, in which case the iodine value mentioned above refers to the value of the fatty acid compound in which multiple compounds are combined.
  • the iodine value of the fatty acid compound is the iodine value measured in accordance with JIS K0070-1992.
  • the fatty acid compound is preferably a compound represented by the following general formula (1).
  • General formula (1) (In the formula, R 1 represents a linear or branched hydrocarbon group having 15 to 19 carbon atoms, R 2 represents either hydrogen or a linear or branched hydrocarbon group having 1 to 18 carbon atoms, AO represents a linear or branched alkylene oxide unit having 2 to 4 carbon atoms, and m represents the average number of moles added and is a number from 0 to 30.)
  • fatty acids and fatty acid alkyl esters, fatty acid polyoxyalkylene alkyl esters, and polyoxyalkylene fatty acid esters are preferred, and these can be used alone or in combination of two or more selected from these.
  • the molecular weight (g/mol) of the fatty acid compound may be, for example, 100 or more, 150 or more, 200 or more, 250 or more, 270 or more, or 280 or more, or 500 or less, 450 or less, 400 or less, 350 or less, 330 or less, or 320 or less.
  • these molecular weights may be weight average molecular weights.
  • R 1 is preferably a linear or branched alkyl group having 15 to 17 carbon atoms and a linear or branched alkenyl group having 15 to 17 carbon atoms.
  • R 2 is preferably hydrogen or a methyl group.
  • AO is preferably an ethylene oxide unit.
  • m is preferably 0 to 15. This is because the workability of the road repair material produced is improved.
  • the iodine value of the fatty acid compound is preferably 60 to 100 (g/100 mg), and more preferably 70 to 85 (g/100 mg).
  • the "alkenyl group” refers to a hydrocarbon group containing 1 to 3 double bonds.
  • Examples of the fatty acid compound (b) represented by the general formula (1) include fatty acid: R 1 COOH, fatty acid methyl ester: R 1 COOCH 3 , fatty acid (poly)oxyethylene methyl ester: R 1 COO(CH 2 CH 2 O) m CH 3 , (poly)oxyethylene fatty acid ester: R 1 COO(CH 2 CH 2 O) m H, and specific examples thereof include palmitic acid, palmitic acid methyl ester, palmitic acid (poly)oxyethylene methyl ester (average number of moles added: 1 to 15), (poly)oxyethylene palmitic acid ester (average number of moles added: 1 to 15), stearic acid, stearate methyl ester, stearic acid (poly)oxyethylene methyl ester (average number of moles added: 1 to 15), (poly)oxyethylene stearate ester (average number of moles added: 1 to 15), oleic acid, oleic acid methyl ester, ole
  • a fatty acid methyl ester mixture containing 75-95% by mass of oleic acid methyl ester and having an iodine value of 50-110 (g/100 mg) or a polyoxyethylene fatty acid ester with 16-18 carbon atoms (average number of moles added: 3-15). This is because the workability of the road repair material produced is improved.
  • the content of the softener in the road repair material of the present invention may be 5 parts by mass or more, 10 parts by mass or more, 15 parts by mass or more, 20 parts by mass or more, 25 parts by mass or more, 30 parts by mass or more, or 40 parts by mass or more, or 70 parts by mass or less, 60 parts by mass or less, 50 parts by mass or less, 40 parts by mass or less, 35 parts by mass or less, or 30 parts by mass or less, per 100 parts by mass of asphalt.
  • the content of the softener in the road repair material of the present invention may be 0.1 mass% or more, 0.3 mass% or more, 0.5 mass% or more, 0.8 mass% or more, or 1.0 mass% or more, and may be 10 mass% or less, 5.0 mass% or less, 3.0 mass% or less, 2.0 mass% or less, 1.5 mass% or less, or 1.0 mass% or less.
  • the road repair material of the present invention is substantially free of cement.
  • the cement content of the entire road repair material is less than 20% by mass, 10% by mass or less, 5% by mass or less, or that no cement is contained at all.
  • the method for producing a road repair material of the present invention includes mixing asphalt, aggregate, and softener.
  • each component of the method for producing a road repair material of the present invention reference can be made to each component described for the road repair material of the present invention.
  • the types and blending amounts of asphalt, aggregate, softener, etc. reference can be made to the above types and contents.
  • the method for manufacturing a road repair material of the present invention can include a step of mixing asphalt and aggregate to obtain a first mixture, and a step of adding a softener to the first mixture and mixing it to obtain a road repair material.
  • the mixture can be heated to about 150°C to 180°C and mixed, but when the road repair material is bagged, it can be cooled to a certain temperature.
  • the first mixture is in a state in which the aggregate is substantially covered with asphalt.
  • the road repair material of the present invention is advantageous because it can be mixed with a softener while the asphalt mixture is still hot after production. That is, with conventional road repair materials that use mineral oil, the mineral oil would ignite if the asphalt mixture was left at a high temperature after production, so it was necessary to cool the material before mixing it with the mineral oil, but with the road repair material of the present invention, such cooling and reheating steps are not necessary.
  • the method for manufacturing the road repair material of the present invention can include, depending on the type of softener, a step of heating the softener to about 20°C as necessary before adding the softener in order to prevent the softener from freezing and to improve its mixability.
  • the above-mentioned mixing step can also be carried out at a temperature of 100°C or less.
  • the viscosity of the asphalt becomes too high, making it difficult to achieve a homogeneous mixture.
  • the softener can reduce the viscosity of the asphalt to a level where the asphalt and aggregate can be mixed homogeneously at a temperature of 100°C or less. Therefore, in the manufacturing method of the present invention, there is no need to mix the asphalt and aggregate at a high temperature exceeding 100°C, making it possible to reduce carbon dioxide emissions.
  • the mixing of asphalt, aggregate, and softener may be carried out at temperatures below 100°C, below 80°C, below 60°C, or below 30°C, and can be carried out at temperatures above 0°C, above 10°C, above 20°C, above 30°C, or above 50°C.
  • the softener As the softener, the following seven types of softener were used.
  • the above aggregate 1 was mixed with asphalt and softener 1 at approximately 160°C so that the content of asphalt and softener 1 in the road repair material was 5.7% by mass, to obtain the road repair material of Example 1.
  • polymer modified asphalt type II Naichireki Co., Ltd., Polyphalt SS
  • approximately 38 parts by mass of softener 1 was used per 100 parts by mass of asphalt.
  • the obtained road repair material and the road repair material of Comparative Example 1 containing a mineral oil-derived product as a softener were evaluated for workability by a penetration resistance test and a flow test, and various physical properties were measured by a Marshall density test, a room temperature wheel tracking test, and a Cantablo test. Furthermore, the obtained road repair material was also subjected to a VOC measurement.
  • the road repair material was filled up to the top of the Marshall mold, leveled, and compacted three times. After that, a needle as shown in Figure 1 was inserted into the material using a push-pull gauge at a speed of 1 inch/second to measure the resistance.
  • the road repair material was placed in a funnel as shown in Figure 2, and the top surface of the funnel was smoothed to a flat surface. The funnel was then lifted horizontally and the time it took for all of the road repair material in the funnel to fall out was measured.
  • the flow test also included observations of changes over time immediately after opening the product bag.
  • the height (A) of the mold is measured.
  • the mass of the empty mold (B) and two sheets of filter paper (C) is measured, and a predetermined mass of 900 grams of the mixture is placed in the mold and tamped 30 times on one side.
  • the weights of the mold, filter paper, and sample (D) are measured, and the drop (E) from the edge of the mold to the surface of the mixture is measured.
  • measurements are taken at four points, and the average drop is calculated.
  • the thickness (t) of the sample after tamping is measured.
  • thickness (t) (A) - (E) - 0.5.
  • the room temperature wheel tracking test was performed according to the method described in B003 (Wheel Tracking Test Method) of the "Pavement Survey and Test Method Handbook, Volume 3 (published by the Japan Road Association)."
  • the Cantabro test was performed at 5°C according to the method described in B010 (Cantabro test method) of the Pavement Survey and Testing Method Handbook, Volume 3 (published by the Japan Road Association).
  • VOC measurements were outsourced to Green Search Co., Ltd., who conducted the measurements at room temperature in accordance with JIS K0125.
  • the repair material of Comparative Example 1 was difficult to disintegrate after one day, and after three days the lumps were disintegrated and measured, and after seven and 14 days the lumps were forcibly disintegrated and measured, whereas the repair material of Example 1 was within the target range in the flow test even after 28 days.
  • the density of the repair material of Comparative Example 1 decreased over time, whereas the density of the repair material of Example 1 remained essentially unchanged even after 28 days.
  • Example 1 The results of the penetration resistance test and flow test regarding the workability of Example 1 were equivalent to those of Comparative Example 1, a conventional product, and the workability was good. In addition, in other physical property tests, Example 1 obtained better results than Comparative Example 1, a conventional product. Furthermore, the road repair material of Example 1 did not emit VOCs.
  • Road repair materials were manufactured by replacing softener 1 with softeners 2 to 7, and evaluated in the same manner. Results were generally equivalent to those of Example 1 or within the target range. Road repair materials in which aggregate 1 was replaced with aggregate 2 also produced good results, but due to the large aggregate particle size, the road repair materials had high durability and load-bearing capacity, although the road repair material using aggregate 1 was better in terms of workability and appearance.
  • the mixing carried out at approximately 160°C to manufacture the road repair material of Example 1 was carried out at approximately 30°C.
  • softener 1 and asphalt were mixed first, and then aggregate 1 was mixed.
  • the obtained road repair material had the same appearance and physical properties as the road repair material of Example 1, or results were obtained that were within the target value range.
  • Example 1 when the road repair material of Example 1 was produced using an asphalt emulsion containing polymer-modified asphalt as the asphalt, not only were the physical properties equivalent to those of Example 1 obtained, but the material was also easier to mix, making production extremely easy.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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  • Road Paving Structures (AREA)
PCT/JP2023/046427 2023-03-30 2023-12-25 道路補修材 Ceased WO2024202337A1 (ja)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0959354A (ja) * 1995-08-30 1997-03-04 Kao Corp アスファルト乳剤用添加剤及びアスファルト組成物
JP2001072860A (ja) * 1999-06-30 2001-03-21 Nichireki Co Ltd アスファルト組成物とその製造方法並びに用途
JP2003160732A (ja) * 2001-11-26 2003-06-06 Osamu Ogata 改質アスファルト組成物、鉱油系軟化剤
JP2009221436A (ja) * 2008-03-18 2009-10-01 Toa Doro Kogyo Co Ltd アスファルト組成物
JP2018080212A (ja) * 2016-11-14 2018-05-24 日油株式会社 アスファルト用施工性改善剤
JP2020090623A (ja) * 2018-12-06 2020-06-11 日油株式会社 アスファルト用施工性改善剤
WO2022070398A1 (ja) * 2020-10-02 2022-04-07 大林道路株式会社 常温アスファルト混合物

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0959354A (ja) * 1995-08-30 1997-03-04 Kao Corp アスファルト乳剤用添加剤及びアスファルト組成物
JP2001072860A (ja) * 1999-06-30 2001-03-21 Nichireki Co Ltd アスファルト組成物とその製造方法並びに用途
JP2003160732A (ja) * 2001-11-26 2003-06-06 Osamu Ogata 改質アスファルト組成物、鉱油系軟化剤
JP2009221436A (ja) * 2008-03-18 2009-10-01 Toa Doro Kogyo Co Ltd アスファルト組成物
JP2018080212A (ja) * 2016-11-14 2018-05-24 日油株式会社 アスファルト用施工性改善剤
JP2020090623A (ja) * 2018-12-06 2020-06-11 日油株式会社 アスファルト用施工性改善剤
WO2022070398A1 (ja) * 2020-10-02 2022-04-07 大林道路株式会社 常温アスファルト混合物

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