WO2021100343A1 - Mélange d'asphalte, procédé de pavage et procédé de production de produit durci d'asphalte - Google Patents

Mélange d'asphalte, procédé de pavage et procédé de production de produit durci d'asphalte Download PDF

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Publication number
WO2021100343A1
WO2021100343A1 PCT/JP2020/037909 JP2020037909W WO2021100343A1 WO 2021100343 A1 WO2021100343 A1 WO 2021100343A1 JP 2020037909 W JP2020037909 W JP 2020037909W WO 2021100343 A1 WO2021100343 A1 WO 2021100343A1
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Prior art keywords
asphalt mixture
carboxylic acid
asphalt
mass
microcapsules
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PCT/JP2020/037909
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English (en)
Japanese (ja)
Inventor
優介 畠中
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富士フイルム株式会社
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Priority to JP2021558207A priority Critical patent/JP7237193B2/ja
Publication of WO2021100343A1 publication Critical patent/WO2021100343A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/10—Metal compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • 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
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/10—Encapsulated ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; 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
    • E01C7/26—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

  • This disclosure relates to an asphalt mixture, a pavement method, and a method for producing a hardened asphalt product.
  • Asphalt mixture used at high temperature (hereinafter referred to as "heated asphalt mixture”) is widely used for pavement of road surface, for example.
  • the heated asphalt mixture thickens or hardens as the temperature decreases, the pot life (that is, the usable time) of the heated asphalt mixture is limited.
  • the heated asphalt mixture is used under conditions that cause a significant decrease in temperature (for example, when a small amount of the heated asphalt mixture is used in several times, when the heated asphalt mixture is transported for a long time, or when a thin layer overlay method is used, etc. It is hard to say that it is suitable for use in (when the heated asphalt mixture is spread thinly by the construction method). Therefore, when using the heated asphalt mixture, it is necessary to appropriately control the temperature of the heated asphalt mixture. For example, the initial rolling temperature of the heated asphalt mixture is adjusted to the range of 110 ° C to 140 ° C.
  • Patent Document 1 describes an aggregate and an asphalt emulsion as main components, and the aggregate and the asphalt emulsion are mixed with each other in a state where the volume of the asphalt emulsion is increased by foaming.
  • a normal temperature asphalt mixture for pavement which is characterized in that the granulation phenomenon is suppressed, is disclosed.
  • Patent Document 2 in addition to the materials normally used in producing a heated asphalt mixture, fats and oils or fatty acids and an alkaline additive are added and mixed, and a curing accelerator is added to the mixture during or immediately after the construction.
  • a room temperature construction type heated asphalt mixture which is characterized in that the added fat or fatty acid and an alkali content rapidly saponify with each other to develop strength.
  • the pavement method using the asphalt mixture described in Patent Document 1 has a problem that the strength of the obtained cured product is relatively small and the curing time is long.
  • Patent Document 2 by supplying a curing accelerator (for example, water) to the asphalt mixture during or immediately after construction, fats and oils or fatty acids and alkalis rapidly saponify. By thickening the viscosity, it is possible to develop the strength that enables early traffic opening.
  • a curing accelerator for example, water
  • the asphalt mixture using the saponification reaction is brought into contact with the curing accelerator, the saponification reaction proceeds. Therefore, adding the curing accelerator to the asphalt mixture before the construction hinders the transportability and workability of the asphalt mixture. there's a possibility that.
  • the present disclosure includes the following aspects.
  • the above-mentioned carboxylic acid which comprises at least one carboxylic acid compound selected from the group consisting of asphalt, aggregate, aliphatic carboxylic acid, and aliphatic carboxylic acid ester, water, and an alkaline compound.
  • An asphalt mixture in which at least one selected from the group consisting of a compound, the above water, and the above alkaline compound is encapsulated in microcapsules.
  • ⁇ 3> The asphalt mixture according to ⁇ 1> or ⁇ 2>, which further contains a cutback agent.
  • ⁇ 4> The asphalt mixture according to any one of ⁇ 1> to ⁇ 3>, wherein at least the carboxylic acid compound is encapsulated in the microcapsules.
  • ⁇ 5> The asphalt mixture according to any one of ⁇ 1> to ⁇ 4>, wherein the aliphatic carboxylic acid has 10 to 26 carbon atoms.
  • ⁇ 6> The asphalt mixture according to any one of ⁇ 1> to ⁇ 5>, wherein the aliphatic carboxylic acid is a fatty acid.
  • ⁇ 7> The asphalt mixture according to any one of ⁇ 1> to ⁇ 6>, wherein the aliphatic carboxylic acid ester has 10 to 26 carbon atoms.
  • ⁇ 8> The asphalt mixture according to any one of ⁇ 1> to ⁇ 7>, wherein the aliphatic carboxylic acid ester is a fatty acid alkyl ester.
  • ⁇ 9> Any of ⁇ 1> to ⁇ 8> in which the content of the carboxylic acid compound is 12% by mass to 20% by mass on a mass basis with respect to the total amount of the asphalt and the carboxylic acid compound.
  • the asphalt mixture according to one. ⁇ 10> One of ⁇ 1> to ⁇ 9> in which the content ratio of the carboxylic acid compound, the water, and the alkaline compound is 50 to 150: 400 to 600: 1 on a mass basis.
  • a pavement method including a step of laying the asphalt mixture according to any one of ⁇ 1> to ⁇ 10> on a paved body and a step of pressurizing the laid asphalt mixture.
  • a method for producing a cured asphalt product which comprises a step of pressurizing the asphalt mixture according to any one of ⁇ 1> to ⁇ 10>.
  • an asphalt mixture having excellent transportability and workability at a low temperature for example, 100 ° C. or lower.
  • a pavement method using an asphalt mixture having excellent transportability and workability at a low temperature (for example, 100 ° C. or lower).
  • a method for producing a cured asphalt product using an asphalt mixture having excellent transportability and workability at a low temperature for example, 100 ° C. or lower.
  • the numerical range represented by using “-" means a range including the numerical values before and after "-" as the lower limit value and the upper limit value.
  • the upper limit value or the lower limit value described in a certain numerical range may be replaced with the upper limit value or the lower limit value of another numerical range described stepwise.
  • the upper limit value or the lower limit value described in a certain numerical range may be replaced with the value shown in the examples.
  • the amount of each component in the composition means the total amount of the plurality of substances present in the composition when a plurality of substances corresponding to each component are present in the composition, unless otherwise specified. ..
  • process is included in the term “process” as long as the intended purpose of the process is achieved, not only in an independent process but also in cases where it cannot be clearly distinguished from other processes. ..
  • the asphalt mixture according to the present disclosure comprises at least one carboxylic acid compound selected from the group consisting of asphalt, aggregate, aliphatic carboxylic acid, and aliphatic carboxylic acid ester, water, and an alkaline compound. At least one selected from the group consisting of the carboxylic acid compound, the water, and the alkaline compound is encapsulated in microcapsules.
  • the asphalt mixture according to the present disclosure it is possible to provide an asphalt mixture having excellent transportability and workability at a low temperature (for example, 100 ° C. or lower).
  • a low temperature for example, 100 ° C. or lower.
  • the reason why the asphalt mixture according to the present disclosure exerts the above effect is presumed as follows. It is considered that the thickening or hardening of the asphalt mixture according to the present disclosure is promoted by the reaction (for example, neutralization or saponification) of the carboxylic acid compound and the alkaline compound in the presence of water.
  • the reaction for example, neutralization or saponification
  • the asphalt mixture according to the present disclosure it is possible to provide an asphalt mixture having excellent transportability and workability at a low temperature.
  • the term "low temperature" relating to transportability and workability is relatively low as compared with the temperature at which the conventional heated asphalt mixture is transported and the temperature at which the conventional heated asphalt mixture is used for construction. Means temperature.
  • the asphalt mixture according to the present disclosure includes asphalt.
  • the asphalt mixture according to the present disclosure may contain one or more asphalts.
  • the type of asphalt is not limited.
  • known asphalt can be used.
  • asphalt include natural asphalt and petroleum asphalt.
  • the asphalt may be modified asphalt.
  • Specific examples of asphalt include straight asphalt, blown asphalt, semi-blown asphalt, and polymer-modified asphalt.
  • Polymer-modified asphalt is a polymer (eg, styrene-butadiene-styrene copolymer, styrene-butadiene rubber, styrene-isoprene-styrene copolymer, ethylene-vinyl acetate copolymer, and ethylene-ethyl acrylate copolymer). It is an asphalt containing.
  • the asphalt preferably contains straight asphalt.
  • the asphalt content is not limited.
  • the asphalt content may be determined, for example, according to the intended use and the desired properties.
  • the asphalt content is preferably 0.5% by mass or more, and preferably 1% by mass or more, based on the total mass of the asphalt mixture from the viewpoint of transportability and workability of the asphalt mixture before curing. It is more preferable, and it is particularly preferable that it is 2% by mass or more.
  • the content of asphalt is preferably 10% by mass or less with respect to the total mass of the asphalt mixture from the viewpoint of the strength of the cured product of the asphalt mixture (hereinafter, may be referred to as "hardened asphalt product"). It is more preferably 8% by mass or less, and particularly preferably 6% by mass or less.
  • the asphalt content is 2% by mass to 15% by mass with respect to the total amount of asphalt and aggregate from the viewpoint of transportability and workability of the asphalt mixture before curing and strength of the asphalt cured product. %, More preferably 3% by mass to 8% by mass.
  • the asphalt mixture according to the present disclosure contains aggregate.
  • the asphalt mixture according to the present disclosure may contain two or more aggregates.
  • the type of aggregate is not limited.
  • a known aggregate can be used.
  • the aggregate include natural aggregate, artificial aggregate, and regenerated aggregate.
  • Specific aggregates include, for example, sand, gravel, crushed stone (for example, No. 6 crushed stone), steel slag, limestone, stone powder, cement, slaked lime, fly ash, ceramics, sinopearl, aluminum grains, plastic grains, carbon black site , Emery, and carbon black.
  • the aggregate preferably contains crushed stone.
  • the content of aggregate is not limited.
  • the content of the aggregate may be determined, for example, according to the intended use and the desired characteristics.
  • the content of the aggregate is preferably 75% by mass or more, more preferably 80% by mass or more, and 85% by mass or more with respect to the total mass of the asphalt mixture. Is particularly preferable.
  • the content of the aggregate is preferably 94% by mass or less, more preferably 92% by mass or less, based on the total mass of the asphalt mixture from the viewpoint of transportability and workability of the asphalt mixture before curing. It is preferably 90% by mass or less, and particularly preferably 90% by mass or less.
  • the content of aggregate is 85% by mass to 98% by mass with respect to the total amount of asphalt and aggregate from the viewpoint of the transportability and workability of the asphalt mixture before hardening and the strength of the hardened asphalt. It is preferably by mass%, more preferably 92% by mass to 97% by mass.
  • the asphalt mixture according to the present disclosure contains at least one carboxylic acid compound selected from the group consisting of an aliphatic carboxylic acid and an aliphatic carboxylic acid ester.
  • the carboxylic acid compound contributes to thickening or hardening of the asphalt mixture by reacting (for example, neutralizing or saponifying) with the alkaline compound in the presence of water.
  • the asphalt mixture according to the present disclosure may contain an aliphatic carboxylic acid or an aliphatic carboxylic acid ester as a carboxylic acid compound.
  • the asphalt mixture according to the present disclosure may contain both an aliphatic carboxylic acid and an aliphatic carboxylic acid as the carboxylic acid compound.
  • the asphalt mixture according to the present disclosure preferably contains an aliphatic carboxylic acid ester as a carboxylic acid compound.
  • the asphalt mixture according to the present disclosure preferably contains an aliphatic carboxylic acid as a carboxylic acid compound from the viewpoint of the strength of the asphalt cured product (for example, martial stability).
  • the asphalt mixture according to the present disclosure contains both an aliphatic carboxylic acid and an aliphatic carboxylic acid ester as the carboxylic acid compound from the viewpoint of transportability, workability, and strength of the cured asphalt product (for example, martial stability). It is preferable to include it.
  • Aliphatic carboxylic acids are aliphatic compounds having at least one carboxy group.
  • the type of aliphatic carboxylic acid is not limited.
  • As the aliphatic carboxylic acid a known aliphatic carboxylic acid can be used.
  • the carbon number of the aliphatic carboxylic acid is preferably 2 to 30, more preferably 10 to 26, and 16 to 22 from the viewpoint of the kneadability of the asphalt mixture before curing and the strength of the asphalt cured product. Is particularly preferable.
  • the aliphatic carboxylic acid examples include an aliphatic monocarboxylic acid, an aliphatic dicarboxylic acid, and an aliphatic tricarboxylic acid.
  • the aliphatic carboxylic acid may be an aliphatic compound having four or more carboxy groups. Further, the aliphatic carboxylic acid may be a saturated aliphatic carboxylic acid or an unsaturated aliphatic carboxylic acid.
  • the aliphatic carboxylic acid is preferably a fatty acid, more preferably a fatty acid having 16 to 22 carbon atoms, from the viewpoint of transportability and workability of the asphalt mixture before curing.
  • Fatty acids are aliphatic compounds having one carboxy group (ie, aliphatic monocarboxylic acids). Examples of fatty acids include saturated fatty acids and unsaturated fatty acids.
  • Saturated fatty acids include, for example, butanoic acid, pentanoic acid, hexanoic acid, heptanic acid, octanoic acid, nonanoic acid, decanoic acid, dodecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, icosanoic acid, docosan. Acids, tetracosanoic acid, hexacosanoic acid, octacosanoic acid, and triacanthanoic acid can be mentioned.
  • unsaturated fatty acids include oleic acid (also known as cis-9-octadecenoic acid), linoleic acid (also known as 9,12-octadecadienoic acid), and linolenic acid (also known as 9,12,15-octadeca). Trienoic acid).
  • the fatty acid is preferably an unsaturated fatty acid, more preferably an unsaturated fatty acid having 16 to 22 carbon atoms, and more preferably olein, from the viewpoint of the kneadability of the asphalt mixture before curing and the strength of the cured asphalt product. It is particularly preferably an acid.
  • the aliphatic carboxylic acid ester is a compound having a structure in which the hydrogen atom of at least one carboxy group (-COOH) of the aliphatic carboxylic acid is replaced with an organic group (for example, an alkyl group).
  • the type of aliphatic carboxylic acid ester is not limited.
  • As the aliphatic carboxylic acid ester a known aliphatic carboxylic acid ester can be used.
  • the carbon number of the aliphatic carboxylic acid ester is preferably 2 to 30, more preferably 10 to 26, and 16 to 16. 22 is particularly preferable.
  • Examples of the aliphatic carboxylic acid constituting the partial structure of the aliphatic carboxylic acid ester include the aliphatic carboxylic acid described in the above section "Aliphatic carboxylic acid".
  • the aliphatic carboxylic acid ester may be an ester of an aliphatic carboxylic acid and a polyhydric alcohol.
  • Examples of the ester of the aliphatic carboxylic acid and the polyhydric alcohol include an ester of a fatty acid and glycerin (that is, fat and oil).
  • the aliphatic carboxylic acid ester is preferably a fatty acid ester, more preferably a fatty acid alkyl ester, and a fatty acid alkyl having 16 to 22 carbon atoms, from the viewpoint of transportability and workability of the asphalt mixture before curing. It is particularly preferable that it is an ester. Further, the aliphatic carboxylic acid ester is preferably at least one fatty acid alkyl ester selected from the group consisting of fatty acid methyl ester and fatty acid ethyl ester, and more preferably fatty acid ethyl ester.
  • fatty acid ethyl esters examples include ethyl heptanoate, ethyl decanoate, ethyl icosanoate, ethyl oleate, and ethyl linoleate.
  • the fatty acid ethyl ester is preferably ethyl oleate.
  • the content of the carboxylic acid compound is preferably 0.1% by mass or more, preferably 0.3% by mass or more, based on the total mass of the asphalt mixture from the viewpoint of kneadability of the asphalt mixture before curing. Is more preferable, and 0.6% by mass or more is particularly preferable.
  • “content of carboxylic acid compound” means the ratio of the total amount of the carboxylic acid compound not contained in the microcapsules and the carboxylic acid compound contained in the microcapsules unless otherwise specified. To do.
  • the content of the carboxylic acid compound is preferably 5% by mass or less, more preferably 3% by mass or less, and more preferably 1.5% by mass, based on the total mass of the asphalt mixture. It is particularly preferable that it is mass% or less.
  • the content of the carboxylic acid compound is 10% by mass to 22% by mass with respect to the total amount of asphalt and the carboxylic acid compound from the viewpoint of the kneadability of the asphalt mixture before curing and the strength of the asphalt cured product. %, More preferably 12% by mass to 20% by mass, and particularly preferably 14% by mass to 18% by mass.
  • the asphalt mixture according to the present disclosure contains water. Water can accelerate the reaction between the carboxylic acid compound and the alkaline compound.
  • the type of water is not limited. Examples of water include tap water, groundwater, distilled water, ion-exchanged water, and industrial water.
  • the water content is preferably 0.5% by mass or more, more preferably 1% by mass or more, and 2% by mass, based on the total mass of the asphalt mixture.
  • water content means the ratio of the total amount of water not contained in microcapsules and water contained in microcapsules, unless otherwise specified.
  • the water content is preferably 10% by mass or less, more preferably 8% by mass or less, and 6% by mass, based on the total mass of the asphalt mixture. It is particularly preferable that it is% or less.
  • the asphalt mixture according to the present disclosure contains an alkaline compound.
  • the asphalt mixture according to the present disclosure may contain one or more alkaline compounds.
  • alkaline compound is not limited as long as it is a compound capable of reacting (for example, neutralizing or saponifying) with a carboxylic acid compound.
  • the alkaline compound may be a compound that produces a chemical species capable of reacting (for example, neutralizing or saponifying) with a carboxylic acid compound by reacting with water.
  • calcium oxide (CaO) can produce calcium hydroxide (Ca (OH) 2 ) capable of reacting with a carboxylic acid compound by reaction with water.
  • alkaline compound examples include alkali metal hydroxides (eg, sodium hydroxide and potassium hydroxide), alkali metal oxides (eg, sodium oxide), and alkaline earth metal hydroxides (eg, water). Calcium oxide) and oxides of alkaline earth metals (eg, calcium oxide). Examples of the alkaline compound include sodium hydrogen carbonate and potassium hydrogen carbonate.
  • the alkaline compound is at least one alkaline compound selected from the group consisting of alkali metal hydroxides, alkali metal oxides, alkaline earth metal hydroxides, and alkaline earth metal oxides. Is preferable.
  • the content of the alkaline compound is preferably 5 ⁇ 10 -4 % by mass or more, preferably 20 ⁇ 10 -4 % by mass or more, based on the total mass of the asphalt mixture. Is more preferable, and 50 ⁇ 10 -4 % by mass or more is particularly preferable.
  • “content of alkaline compound” means the ratio of the total amount of the alkaline compound not contained in the microcapsules and the alkaline compound contained in the microcapsules unless otherwise specified.
  • the content of the alkaline compound is preferably 1,000 ⁇ 10 -4 % by mass or less, preferably 500 ⁇ 10 with respect to the total mass of the asphalt mixture, from the viewpoint of transportability and workability of the asphalt mixture before curing. more preferably -4 or less by mass%, particularly preferably 100 ⁇ 10 -4% by weight or less.
  • the content ratio of the carboxylic acid compound, water, and the alkaline compound is based on the mass from the viewpoint of the transportability and workability of the asphalt mixture before curing and the strength of the asphalt cured product.
  • the ratio is preferably 20 to 250: 250 to 900: 1, more preferably 30 to 200: 300 to 750: 1, and particularly preferably 50 to 150: 400 to 600: 1.
  • Microcapsules At least one selected from the group consisting of carboxylic acid compounds, water, and alkaline compounds contained in the asphalt mixture according to the present disclosure is encapsulated in microcapsules.
  • the progress of the reaction between the carboxylic acid compound and the alkaline compound in the asphalt mixture can be suppressed, and thus the unintended time (for example, transportation). It is possible to suppress the progress of thickening or hardening of the asphalt mixture during (during the process and during the construction).
  • At least one selected from the group consisting of a carboxylic acid compound, water, and an alkaline compound contained in the asphalt mixture according to the present disclosure is encapsulated in microcapsules for each type.
  • the controllability of the reaction between the carboxylic acid compound and the alkaline compound can be further improved. Therefore, the transportability and workability can be further improved.
  • the term "type” relating to microcapsules means three classifications of carboxylic acid compounds, water, and alkaline compounds.
  • the term “by type” relating to microcapsules means that carboxylic acid compounds, water, and alkaline compounds are treated separately. Therefore, in the embodiment that "at least one selected from the group consisting of a carboxylic acid compound, water, and an alkaline compound is encapsulated in a microcapsule for each type", the group consisting of a carboxylic acid compound, water, and an alkaline compound.
  • the component that is allowed to be encapsulated in one of the microcapsules is, in principle, a carboxylic acid compound, water, or an alkaline compound.
  • At least one selected from the group consisting of a carboxylic acid compound, water, and an alkaline compound is encapsulated in a microcapsule for each type
  • the group consisting of a carboxylic acid compound, water, and an alkaline compound from the group consisting of a carboxylic acid compound, water, and an alkaline compound.
  • the two or three selected species are separately encapsulated in multiple microcapsules. For example, when the objects contained in the microcapsules are a carboxylic acid compound and water, the carboxylic acid compound and water are separately contained in a plurality of microcapsules.
  • the asphalt mixture according to the present disclosure may contain at least one selected from the group consisting of microcapsules containing a carboxylic acid compound, microcapsules containing water, and microcapsules containing an alkaline compound. ..
  • a plurality of components belonging to the same type for example, a plurality of compounds belonging to a carboxylic acid compound
  • microcapsules contained in the asphalt mixture according to the present disclosure include, for example, the following seven embodiments.
  • Microcapsules containing carboxylic acid compounds (2) Microcapsules containing water (3) Microcapsules containing alkaline compounds (4) Microcapsules containing carboxylic acid compounds and microcapsules containing water ( 5) Microcapsules containing carboxylic acid compounds and microcapsules containing alkaline compounds (6) Microcapsules containing water and microcapsules containing alkaline compounds (7) Microcapsules containing carboxylic acid compounds, water Microcapsules containing, and microcapsules containing alkaline compounds
  • At least a carboxylic acid compound is encapsulated in microcapsules from the viewpoint of transportability and workability.
  • the content of the carboxylic acid compound contained in the microcapsules is preferably 85% by mass to 100% by mass with respect to the total mass of the carboxylic acid compound. , 90% by mass to 100% by mass, more preferably 95% by mass to 100% by mass.
  • the content of water contained in the microcapsules is preferably 85% by mass to 100% by mass, and 90% by mass to 100% by mass, based on the total mass of water. It is more preferably by mass%, and particularly preferably 95% by mass to 100% by mass.
  • the content of the alkaline compound contained in the microcapsules is preferably 85% by mass to 100% by mass, preferably 90% by mass, based on the total mass of the alkaline compound. It is more preferably% to 100% by mass, and particularly preferably 95% by mass to 100% by mass.
  • the components of the wall material (that is, the outer shell) of the microcapsules are not limited.
  • the wall material of the microcapsules preferably contains a polymer.
  • polystyrene block copolymer examples include polyurethane, polyurea, polyester, polyether, polyolefin, polyamide, polyvinyl chloride, acrylic resin, styrene-ethylene / butylene-styrene block copolymer (SEBS), and styrene-butadiene-styrene block copolymer weight.
  • SEBS styrene-ethylene / butylene-styrene block copolymer
  • SEPS styrene-butadiene-styrene block copolymer
  • the wall material of the microcapsules preferably contains at least one polymer selected from the group consisting of polyurethane and polyurea, and more preferably contains polyurethane.
  • the wall material of the microcapsules contains the above-mentioned polymer, it is possible to suppress the destruction of the microcapsules in the manufacturing process (for example, kneading) of the asphalt mixture, so that the transportability and workability can be improved.
  • the polyurethane structure is not limited as long as it has a urethane bond.
  • Polyurethane preferably has a structural unit derived from a polyfunctional isocyanate compound.
  • the polyfunctional isocyanate compound is an isocyanate compound having two or more isocyanate groups (that is, -NCO) or an isocyanate compound having three or more isocyanate groups from the viewpoint of kneadability of the asphalt mixture. It is preferable, and it is more preferable that it is an isocyanate compound having three or more isocyanate groups.
  • polyfunctional isocyanate compound examples include methylenediphenyl 4,4'-diisocyanate, methylenediphenyl 4,4'-diisocyanate, 1,4-phenylenediisocyanate, and 4,4'-diisocyanate-3,3'. Includes dimethylbiphenyl, tolylene diisocyanate (eg, tolylen-2,4-diisocyanate, and tolylen-2,6-diisocyanate), and trimethylolpropane adduct of tolylene isocyanate. Examples of commercially available products of the polyfunctional isocyanate compound include Barnock (registered trademark) D-750 (DIC Corporation) and Burnock DN-980 (DIC Corporation).
  • polyurea is not limited as long as it has a urea bond.
  • Polyurea preferably has a structural unit derived from a polyfunctional isocyanate compound.
  • the polyfunctional isocyanate compound include the polyfunctional isocyanate compound described in the description of polyurethane.
  • a preferred embodiment of the polyfunctional isocyanate compound forming the constituent unit of polyurea is the same as that of the polyfunctional isocyanate compound described in the description of polyurethane.
  • the thickness of the wall material of the microcapsules is not limited. From the viewpoint of kneadability of the asphalt mixture, the average thickness of the wall material of the microcapsules is preferably 0.2 ⁇ m or more, more preferably 1 ⁇ m or more, further preferably 3 ⁇ m or more, and 4 ⁇ m or more. Is particularly preferable. From the viewpoint of the strength of the asphalt cured product, the average thickness of the wall material of the microcapsules is preferably 20 ⁇ m or less, more preferably 10 ⁇ m or less, and particularly preferably 5 ⁇ m or less. The average thickness of the wall material of the microcapsules is the arithmetic mean of the thickness of the wall material of 30 arbitrarily selected microcapsules. The thickness of the wall material of the microcapsules is measured using a scanning electron microscope (SEM).
  • SEM scanning electron microscope
  • the particle size of microcapsules is not limited.
  • the average particle size of the microcapsules is preferably 1 ⁇ m or more, more preferably 5 ⁇ m or more, and particularly preferably 10 ⁇ m or more, from the viewpoint of the strength of the cured asphalt product. From the viewpoint of kneadability of the asphalt mixture, the average particle size of the microcapsules is preferably 500 ⁇ m or less, more preferably 300 ⁇ m or less, further preferably 100 ⁇ m or less, and particularly preferably 50 ⁇ m or less. preferable.
  • the average particle size of the microcapsules is the arithmetic mean of the particle size of 30 arbitrarily selected microcapsules. The particle size of the microcapsules is measured using a scanning electron microscope (SEM).
  • the manufacturing method of microcapsules is not limited.
  • a method for producing microcapsules for example, a known method can be used depending on the composition of the wall material of the microcapsules and the components contained in the microcapsules.
  • the method for producing microcapsules include an interfacial polymerization method, an in-situ polymerization method, an in-liquid curing coating method, a phase separation method (core selvation method), an in-liquid drying method (interfacial precipitation method), and a spray-drying method. Can be mentioned.
  • an oil droplet type emulsion (O / W type emulsion) in water can be obtained by dispersing an oil phase containing a carboxylic acid compound and a monomer (for example, a polyfunctional isocyanate compound) in the aqueous phase. it can.
  • a monomer for example, a polyfunctional isocyanate compound
  • microcapsules containing a carboxylic acid compound can be formed.
  • the conditions for polymerizing the monomer in the above method are not limited and may be determined according to the type of the monomer.
  • a water-in-oil emulsion (W / O emulsion) can be obtained by dispersing the aqueous phase in an oil phase containing raw materials (for example, a monomer and a polymerization initiator) for forming a wall material. it can.
  • raw materials for example, a monomer and a polymerization initiator
  • W / O emulsion emulsion
  • emulsion emulsion in which oil droplets containing water are dispersed in the aqueous phase. it can.
  • microcapsules containing water can be formed.
  • the conditions for polymerizing the monomer in the above method are not limited and may be determined according to the type of the monomer.
  • the asphalt mixture according to the present disclosure may contain components other than the above-mentioned components (hereinafter, referred to as "other components").
  • Other components include, for example, cutback agents, organic solvents, surfactants, and emulsifiers.
  • various additives added to known asphalt mixtures can also be mentioned.
  • the asphalt mixture according to the present disclosure preferably further contains a cutback agent. Since the cutback agent can suppress an increase in the viscosity of the asphalt mixture, it is possible to improve the transportability and workability of the asphalt mixture. For the same reason, the cutback agent can also improve the kneadability of the asphalt mixture.
  • Examples of the cutback agent include mineral oil, tar, pitch, gasoline, kerosene, A heavy oil, B heavy oil, and C heavy oil.
  • the cutback agent is preferably mineral oil.
  • the content of the cutback agent is not limited.
  • the content of the cutback agent is 0.1 with respect to the total mass of the asphalt mixture from the viewpoint of kneadability, transportability, and workability of the asphalt mixture. It is preferably from mass% to 5% by mass, more preferably from 0.5% by mass to 5% by mass, and particularly preferably from 0.5% by mass to 3% by mass.
  • Examples of the method for producing the asphalt mixture according to the present disclosure include a method of mixing asphalt, an aggregate, a carboxylic acid compound, water, and an alkaline compound by a known method.
  • At least one selected from the group consisting of a carboxylic acid compound, water, and an alkaline compound is encapsulated in microcapsules in advance.
  • a composition containing a carboxylic acid compound may be used as a source of the carboxylic acid compound.
  • the composition containing the carboxylic acid compound include tall oil.
  • a composition containing an alkaline compound may be used as a source of the alkaline compound.
  • examples of the composition containing an alkaline compound include Portland cement.
  • microcapsules containing a carboxylic acid compound are prepared based on the method described in the above section "Microcapsules".
  • an asphalt mixture can be obtained by mixing asphalt, an aggregate, microcapsules containing a carboxylic acid compound, water, and Portland cement as a source of an alkaline compound by a known method.
  • the asphalt mixture according to the present disclosure is excellent in transportability and workability, it can be used for construction of various asphalt pavements.
  • the road surface can be paved.
  • the asphalt mixture according to the present disclosure can also be used for repairing asphalt pavement.
  • the pavement method according to the present disclosure includes a step of laying the asphalt mixture according to the present disclosure on the paved body (hereinafter, may be referred to as a “laying step”) and a step of pressurizing the laid asphalt mixture (hereinafter, referred to as “laying step”). , May be referred to as "pressurization process").
  • laying step a step of laying the asphalt mixture according to the present disclosure on the paved body
  • pressurization process May be referred to as "pressurization process”
  • the pavement method according to the present disclosure includes a step of laying the asphalt mixture according to the present disclosure on the paved body.
  • the asphalt mixture applied to the pavement method according to the present disclosure is as described in the above section "Asphalt mixture". Further, the asphalt mixture applied to the pavement method according to the present disclosure may be prepared before being laid on the paved body. For example, the asphalt mixture may be prepared, if desired, just prior to laying on the pavement.
  • the type of paved body is not limited.
  • the paved body may be a tangible body on which an asphalt mixture can be laid.
  • a layer called a roadbed or a roadbed can be mentioned.
  • Materials contained in the pavement include, for example, sand, gravel, crushed stone, cement, and lime.
  • the method of laying the asphalt mixture is not limited.
  • a method of laying the asphalt mixture a known method can be used.
  • an asphalt mixture can be laid using an asphalt finisher.
  • the temperature of the asphalt mixture when laying the asphalt mixture is preferably 0 ° C to 100 ° C, more preferably 15 ° C to 100 ° C.
  • the pavement method according to the present disclosure includes a step of pressurizing the laid asphalt mixture.
  • the inclusion components of the microcapsules are released by the destruction of the microcapsules, so that the asphalt mixture is thickened or hardened.
  • the method of pressurizing the asphalt mixture is not limited.
  • a method of pressurizing the asphalt mixture a known method can be used.
  • Examples of the method of pressurizing the asphalt mixture include a method using a compaction machine (for example, a road roller).
  • the asphalt mixture may be pressurized multiple times.
  • the pressure when pressurizing the asphalt mixture is not limited as long as the pressure is such that the microcapsules contained in the asphalt mixture can be destroyed.
  • the pressure at which the asphalt mixture is pressurized may be determined, for example, in the range of 0.1 MPa to 500 MPa.
  • the temperature of the asphalt mixture when pressurizing the asphalt mixture is preferably 0 ° C to 100 ° C, more preferably 15 ° C to 100 ° C.
  • the pavement method according to the present disclosure may include steps other than the laying step and the pressurizing step as long as the gist of the present disclosure is not deviated.
  • the pavement method according to the present disclosure may include a step of leveling the surface of the laid asphalt mixture while arranging the asphalt mixture or between the laying step and the pressurizing step. By leveling the surface of the laid asphalt mixture, the asphalt mixture can be uniformly pressurized in the pressurizing step.
  • the pavement method according to the present disclosure preferably includes a step of curing the pressurized asphalt mixture (hereinafter, may be referred to as a "curing step") after the pressurizing step.
  • a curing step includes protecting or allowing the asphalt mixture to stand.
  • the environment for example, temperature, humidity, and time
  • the environment for example, temperature, humidity, and time
  • the temperature at which the asphalt mixture is cured is preferably 10 ° C to 40 ° C, more preferably 15 ° C to 25 ° C.
  • the humidity (relative humidity) when curing the asphalt mixture is preferably 0% to 90%, more preferably 0% to 70%.
  • the time for curing the asphalt mixture is preferably 1 hour to 72 hours, more preferably 3 hours to 24 hours.
  • the surface of the paved body can be paved with a cured product (asphalt cured product) of the asphalt mixture after thickening or hardening of the asphalt mixture.
  • a cured product asphalt cured product
  • the asphalt cured product formed on the road surface can function as, for example, the surface layer of the road.
  • the method for producing a cured asphalt product according to the present disclosure includes a step of pressurizing the asphalt mixture according to the present disclosure (pressurization step). According to the method for producing a cured asphalt product according to the present disclosure, it is possible to provide a method for producing a cured asphalt product using an asphalt mixture having excellent transportability and workability at a low temperature (for example, 100 ° C. or lower).
  • Asphalt mixture applied to the method for producing a cured asphalt product according to the present disclosure is as described in the above section "Asphalt mixture”.
  • the method and conditions of the pressurizing step in the method for producing a cured asphalt product according to the present disclosure can be applied to the method and conditions of the pressurizing step described in the above section "Pavement method".
  • the method for producing a cured asphalt product according to the present disclosure may include, if necessary, a step (laying step) of laying the asphalt mixture according to the present disclosure on the paved body before the pressurizing step.
  • a step (laying step) of laying the asphalt mixture according to the present disclosure on the paved body before the pressurizing step.
  • the method and conditions of the laying process in the method for producing a cured asphalt product according to the present disclosure the method and conditions of the laying process described in the above section "Pavement method" can be applied.
  • the pressurizing step is performed on the laid asphalt mixture. That is, the laid asphalt mixture is pressurized.
  • the method for producing a cured asphalt product according to the present disclosure may include other steps described in the above section "Pavement method", if necessary.
  • a cured product (hardened asphalt product) of the asphalt mixture according to the present disclosure can be obtained after thickening or curing the asphalt mixture.
  • the method for producing a hardened asphalt product according to the present disclosure can be used, for example, for construction of asphalt pavement and repair of asphalt pavement.
  • Na 2 O eq means the content (mass%) of total alkali in Portland cement calculated by the following formula described in "JIS R 5210: 2019".
  • the content of alkaline compounds in the asphalt mixture containing Portland cement shall be calculated based on the value of "Na 2 O eq”.
  • Formula: Na 2 O eq Na 2 O + 0.658 ⁇ K 2 O Na 2 O: Sodium oxide content (mass%) in Portland cement
  • K 2 O Potassium oxide content (mass%) in Portland cement
  • PVA-205 polyvinyl alcohol
  • Kuraray Co., Ltd. 9 parts by mass
  • microcapsules (A) containing the fatty acid ester and the fatty acid are simply referred to as "microcapsules (A)".
  • the average thickness of the wall material of the microcapsules (A) is 2.1 ⁇ m.
  • the average particle size of the microcapsules (A) is 45 ⁇ m.
  • the content of the aliphatic carboxylic acid and the aliphatic carboxylic acid ester in the microcapsules (A) is 90% by mass.
  • microcapsules (B) containing the fatty acid ester and the fatty acid are simply referred to as "microcapsules (B)".
  • the average thickness of the wall material of the microcapsules (B) is 3.5 ⁇ m.
  • the average particle size of the microcapsules (B) is 50 ⁇ m.
  • the content of the aliphatic carboxylic acid and the aliphatic carboxylic acid ester in the microcapsules (B) is 88% by mass.
  • a fatty acid ester and a microcapsule (C) containing a fatty acid were obtained by the same procedure as that of the microcapsule (A) containing a fatty acid.
  • microcapsules (C) containing the aliphatic carboxylic acid and the aliphatic carboxylic acid ester are simply referred to as “microcapsules (C)”.
  • the average thickness of the wall material of the microcapsules (C) is 4.9 ⁇ m.
  • the average particle size of the microcapsules (C) is 45 ⁇ m.
  • the content of the aliphatic carboxylic acid and the aliphatic carboxylic acid ester in the microcapsules (C) is 88% by mass.
  • Microcapsules (D) containing an aliphatic carboxylic acid and an aliphatic carboxylic acid ester By the same procedure as the microcapsules (A) containing fatty acid ester and fatty acid, except that the trimethylol propane adduct (Bernock D-750) of Trilenis isocyanate was changed to Bernock DN-980 (DIC Co., Ltd.). , A fatty acid ester and a microcapsule (D) containing a fatty acid were obtained.
  • the microcapsules (D) containing the fatty acid ester and the fatty acid are simply referred to as "microcapsules (D)".
  • the average thickness of the wall material of the microcapsules (D) is 2.1 ⁇ m.
  • the average particle size of the microcapsules (D) is 45 ⁇ m.
  • the content of the aliphatic carboxylic acid and the aliphatic carboxylic acid ester in the microcapsules (D) is 90% by mass.
  • Microcapsules (E) containing an aliphatic carboxylic acid ester were obtained by the same procedure as for microcapsules (A) except that the tall oil was changed to ethyl oleate.
  • the microcapsules (E) containing the fatty acid ester are simply referred to as "microcapsules (E)".
  • the average thickness of the wall material of the microcapsules (E) is 2.1 ⁇ m.
  • the average particle size of the microcapsules (E) is 45 ⁇ m.
  • the content of the aliphatic carboxylic acid ester in the microcapsules (E) is 90% by mass.
  • Microcapsules (F) containing aliphatic carboxylic acid were obtained by the same procedure as for microcapsules (A) except that the tall oil was changed to oleic acid.
  • the microcapsules (F) containing fatty acids are simply referred to as "microcapsules (F)".
  • the average thickness of the wall material of the microcapsules (F) is 2.1 ⁇ m.
  • the average particle size of the microcapsules (F) is 45 ⁇ m.
  • the content of the aliphatic carboxylic acid in the microcapsules (F) is 90% by mass.
  • sodium chloride and sodium nitrite as a water-soluble polymerization inhibitor were added to ion-exchanged water to prepare a sodium chloride-sodium nitrite aqueous solution.
  • the concentration of sodium chloride in the sodium chloride-sodium nitrite aqueous solution was adjusted to 1% by mass.
  • the concentration of sodium nitrite in the sodium chloride-sodium nitrite aqueous solution was adjusted to 0.02% by mass.
  • a primary emulsion of a water droplet (W / O) type emulsion in oil was prepared by adding a sodium chloride-sodium nitrite aqueous solution (100 parts by mass) to the monomer solution and then stirring the mixture using a stirring / dispersing device.
  • the obtained primary emulsion contains 1% by mass of polyvinyl alcohol (PVA, Poval PVA-205, Kuraray Co., Ltd.) as a dispersant and 0.02% by mass of sodium nitrite as a water-soluble polymerization inhibitor.
  • PVA polyvinyl alcohol
  • a slurry containing microcapsules (G) containing water was obtained.
  • IPA isopropanol
  • Solvent replacement using a centrifuge was performed by sedimenting the microcapsules (G) in the slurry, removing the supernatant, and then redispersing the microcapsules (G) in isopropanol.
  • microcapsules (G) containing water were simply referred to as "microcapsules (G)".
  • the average thickness of the wall material of the microcapsules (G) is 4.0 ⁇ m.
  • the average particle size of the microcapsules (G) is 60 ⁇ m.
  • the water content in the microcapsules (G) is 87% by mass.
  • Example 1 An asphalt mixture was obtained by kneading each of the following components using a three-one motor (Shinto Kagaku Co., Ltd.). The kneading conditions are as follows.
  • Example 2 An asphalt mixture was obtained by kneading each of the following components using a three-one motor (Shinto Kagaku Co., Ltd.). The kneading conditions are as follows.
  • Example 3 An asphalt mixture was obtained by kneading each of the following components using a three-one motor (Shinto Kagaku Co., Ltd.). The kneading conditions are as follows.
  • Example 4 An asphalt mixture was obtained by kneading each of the following components using a three-one motor (Shinto Kagaku Co., Ltd.). The kneading conditions are as follows.
  • Example 5 An asphalt mixture was obtained by kneading each of the following components using a three-one motor (Shinto Kagaku Co., Ltd.). The kneading conditions are as follows.
  • Example 6 An asphalt mixture was obtained by kneading each of the following components using a three-one motor (Shinto Kagaku Co., Ltd.). The kneading conditions are as follows.
  • Example 7 An asphalt mixture was obtained by kneading each of the following components using a three-one motor (Shinto Kagaku Co., Ltd.). The kneading conditions are as follows.
  • Example 8 An asphalt mixture was obtained by kneading each of the following components using a three-one motor (Shinto Kagaku Co., Ltd.). The kneading conditions are as follows.
  • B The asphalt mixture could be kneaded for 60 minutes, and the rate of increase in viscosity after kneading with respect to the viscosity before kneading was more than 5% and 25% or less.
  • C The asphalt mixture could be kneaded for 60 minutes, and the rate of increase in viscosity after kneading with respect to the viscosity before kneading was more than 25% and 50% or less.
  • D The asphalt mixture could not be kneaded for 60 minutes because the asphalt mixture aggregated during the kneading.
  • microcapsule in the column of "asphalt mixture” in Table 1 means the component contained in the microcapsule.
  • the component described as "-" in the "Asphalt mixture” column of Table 1 means a component not contained in the asphalt mixture.

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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)
  • Materials Engineering (AREA)
  • Architecture (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Road Paving Structures (AREA)

Abstract

La présente invention concerne : un mélange d'asphalte présentant une excellente transportabilité et une excellente ouvrabilité à basse température (par exemple, à une température inférieure ou égale à 100 °C) ; et une application associée. Le mélange d'asphalte comprend : un asphalte ; un granulat ; au moins un composé acide carboxylique choisi dans le groupe constitué par un acide carboxylique aliphatique et un ester d'acide carboxylique aliphatique ; de l'eau ; et un composé alcalin, au moins un élément choisi dans le groupe constitué par le composé acide carboxylique, l'eau et le composé alcalin étant encapsulé dans une microcapsule.
PCT/JP2020/037909 2019-11-19 2020-10-06 Mélange d'asphalte, procédé de pavage et procédé de production de produit durci d'asphalte WO2021100343A1 (fr)

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CN113861704A (zh) * 2021-09-22 2021-12-31 烟台南山学院 一种基于相变胶囊的沥青材料及其制备工艺

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JPH04296363A (ja) * 1990-12-19 1992-10-20 Nynas Petroleum:Ab ビチューメンエマルジョン、その製造法、それに使用する破壊添加剤、およびビチューメンエマルジョンの使用
JPH08183948A (ja) * 1994-12-27 1996-07-16 Nakajima Kinzoku Kogyo Kk 路面凍結抑制剤及びこれを用いた路面凍結抑制舗装材
JPH1149963A (ja) * 1997-03-10 1999-02-23 Colas Sa ビチューメンエマルジョン、ビチューメンエマルジョンの製造方法、及び舗装の建設又は整備用のビチューメン材料の製造方法
JP2004299127A (ja) * 2003-03-28 2004-10-28 Railway Technical Res Inst コンクリートの製造方法、並びにコンクリート用粉体及び繊維混和材
JP2009073905A (ja) * 2007-09-20 2009-04-09 Masatoshi Okabayashi 常温アスファルト合材添加用カプセル体
WO2015107762A1 (fr) * 2014-01-17 2015-07-23 前田道路株式会社 Mélange asphaltique, son procédé de production et procédé de pavage l'utilisant
JP2017082180A (ja) * 2015-10-30 2017-05-18 シンレキ工業株式会社 繊維入り鹸化反応型常温アスファルト混合物

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Publication number Priority date Publication date Assignee Title
JPH04296363A (ja) * 1990-12-19 1992-10-20 Nynas Petroleum:Ab ビチューメンエマルジョン、その製造法、それに使用する破壊添加剤、およびビチューメンエマルジョンの使用
JPH08183948A (ja) * 1994-12-27 1996-07-16 Nakajima Kinzoku Kogyo Kk 路面凍結抑制剤及びこれを用いた路面凍結抑制舗装材
JPH1149963A (ja) * 1997-03-10 1999-02-23 Colas Sa ビチューメンエマルジョン、ビチューメンエマルジョンの製造方法、及び舗装の建設又は整備用のビチューメン材料の製造方法
JP2004299127A (ja) * 2003-03-28 2004-10-28 Railway Technical Res Inst コンクリートの製造方法、並びにコンクリート用粉体及び繊維混和材
JP2009073905A (ja) * 2007-09-20 2009-04-09 Masatoshi Okabayashi 常温アスファルト合材添加用カプセル体
WO2015107762A1 (fr) * 2014-01-17 2015-07-23 前田道路株式会社 Mélange asphaltique, son procédé de production et procédé de pavage l'utilisant
JP2017082180A (ja) * 2015-10-30 2017-05-18 シンレキ工業株式会社 繊維入り鹸化反応型常温アスファルト混合物

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113861704A (zh) * 2021-09-22 2021-12-31 烟台南山学院 一种基于相变胶囊的沥青材料及其制备工艺

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