JP4473896B2 - Asphalt additive and method for producing asphalt mixture - Google Patents

Asphalt additive and method for producing asphalt mixture Download PDF

Info

Publication number
JP4473896B2
JP4473896B2 JP2007191923A JP2007191923A JP4473896B2 JP 4473896 B2 JP4473896 B2 JP 4473896B2 JP 2007191923 A JP2007191923 A JP 2007191923A JP 2007191923 A JP2007191923 A JP 2007191923A JP 4473896 B2 JP4473896 B2 JP 4473896B2
Authority
JP
Japan
Prior art keywords
asphalt
additive
weight
parts
mixture
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
JP2007191923A
Other languages
Japanese (ja)
Other versions
JP2009029839A (en
Inventor
勲 兵藤
慶文 荒尾
Original Assignee
三野道路株式会社
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 三野道路株式会社 filed Critical 三野道路株式会社
Priority to JP2007191923A priority Critical patent/JP4473896B2/en
Publication of JP2009029839A publication Critical patent/JP2009029839A/en
Application granted granted Critical
Publication of JP4473896B2 publication Critical patent/JP4473896B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Road Paving Structures (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

本発明は、補強繊維を含むアスファルト用添加物、該アスファルト添加物を使用したアスファルト混合物の製造方法に関する。   The present invention relates to an asphalt additive containing reinforcing fibers and a method for producing an asphalt mixture using the asphalt additive.

道路の舗装に使用されるアスファルトは、砕石、砂及び石粉などの骨材と混合され、加熱下の柔らかい状態で路上に敷き詰められてアスファルト道路を形成する。
アスファルト道路は、車両走行によって、磨耗等の劣化が早期に生じるため、アスファルト中に補強材又は改質剤を混合して、アスファルトの機械的強度及び耐久性の向上を図っている。例えば特許文献1には、ポリオレフィン系の強化繊維をアスファルトに混合して、耐久性、可撓性及び剪断耐性を向上させる舗装用組成物が開示されている。
Asphalt used for road paving is mixed with aggregates such as crushed stone, sand and stone powder, and is spread on the road in a soft state under heating to form an asphalt road.
Asphalt roads are deteriorated at an early stage due to running of the vehicle, and therefore, reinforcing materials or modifiers are mixed in the asphalt to improve the mechanical strength and durability of the asphalt. For example, Patent Document 1 discloses a paving composition that improves durability, flexibility, and shear resistance by mixing polyolefin-based reinforcing fibers with asphalt.

特開平5−98165号公報JP-A-5-98165

上記特許文献1の技術では、アスファルト中で強化繊維が均一に分散せず、舗装されたアスファルトの機械的強度が均一にならない。これはポリオレフィン系繊維が静電気等により帯電して繊維間で互いに引きつけ合うため、アスファルト中で分散せずにポリオレフィン系繊維に塊ができた状態で固化するため、舗装されたアスファルト中で強化繊維の濃度が不均一となり、交通量の多い道路や高温等の悪条件下では、アスファルトの流動化、磨耗及びクラックが発生する。   In the technique of Patent Document 1, the reinforcing fibers are not uniformly dispersed in the asphalt, and the mechanical strength of the paved asphalt is not uniform. This is because the polyolefin fibers are charged by static electricity and attract each other, so they are not dispersed in the asphalt and solidify in a lump in the polyolefin fibers, so that the reinforcing fibers in the paved asphalt The concentration becomes uneven, and asphalt fluidization, wear, and cracking occur under bad conditions such as high-traffic roads and high temperatures.

本発明の課題は、取り扱いが容易で作業環境を良好にし、かつアスファルト中での繊維の均一分散を可能にして、耐流動性、耐磨耗性などの必要特性のバランスがとりやすいアスファルト用添加物と、該アスファルト添加物を使用したアスファルト混合物の製造方法を提供することにある。   The object of the present invention is to add asphalt that is easy to handle, improves the working environment, enables uniform dispersion of fibers in the asphalt, and easily balances necessary properties such as flow resistance and wear resistance. And a method for producing an asphalt mixture using the asphalt additive.

課題を解決するための手段及び発明の効果Means for Solving the Problems and Effects of the Invention

上記課題を解決するために、本発明のアスファルト用添加物は、ストレートアスファルトに対して親和性を有する添加材と、疎水化処理された短繊維からなる綿状の繊維物とを含み、繊維物に添加材を含浸させて含浸混合物となし、該含浸混合物を合成樹脂製の包装袋内に収容し、該包装袋を加熱下のストレートアスファルトに投入して用いるようしたことを特徴とする。   In order to solve the above-mentioned problems, an additive for asphalt of the present invention includes an additive having an affinity for straight asphalt, and a cotton-like fiber material made of hydrophobized short fibers, The impregnation mixture is impregnated into an impregnation mixture, the impregnation mixture is contained in a synthetic resin packaging bag, and the packaging bag is put into a heated straight asphalt for use.

上記構成とすることで、アスファルト混合物の製造時における材料投入時には、包装袋から含浸混合物を取出す必要がないため取り扱いが容易、かつ含浸混合物が投入作業中に飛散しないため作業環境が良好であり、保管時には吸湿が抑えられるため保存期間を長くでき、繊維物に含浸した添加材の外部への漏れを防止できる。また、含浸混合物は繊維間での滑りがよく塊になり難く分散性が良好であるため、繊維物の濃度が均一となり、耐流動性、耐摩耗性及び耐クラック性の向上を図ることができる。   By adopting the above-described configuration, when the material is introduced at the time of manufacturing the asphalt mixture, it is not necessary to take out the impregnated mixture from the packaging bag, so that the handling is easy and the working environment is good because the impregnated mixture does not scatter during the input operation, Since moisture absorption is suppressed during storage, the storage period can be extended, and leakage of the additive impregnated into the fiber can be prevented. Further, since the impregnated mixture has good slipperiness between fibers and does not easily agglomerate and has good dispersibility, the concentration of the fiber can be made uniform, and the flow resistance, wear resistance and crack resistance can be improved. .

包装袋の厚みを、0.03〜0.06mmとなしたので、この厚みによって内容物の品質低下が防止され、かつアスファルト混合物の製造時、包装袋の溶けが良好であるため、繊維物の分散性が損なわれない。包装袋の厚みが0.03mm未満では、含浸した添加材が包装袋から滲み出てしまい、0.06mmを越えると包装袋が混合時に溶け難くなり、アスファルトへの繊維状物の分散性が悪化するので、上記範囲が望ましいと言える。   Since the thickness of the packaging bag is 0.03 to 0.06 mm, the thickness prevents the quality of the contents from being deteriorated, and the melting of the packaging bag is good when manufacturing the asphalt mixture. Dispersibility is not impaired. When the thickness of the packaging bag is less than 0.03 mm, the impregnated additive oozes out from the packaging bag, and when it exceeds 0.06 mm, the packaging bag becomes difficult to dissolve when mixed, and the dispersibility of the fibrous material in asphalt deteriorates. Therefore, it can be said that the above range is desirable.

短繊維は、植物繊維からなるので、植物繊維はセルロースを含み、該セルロースは水酸基を多く含み、分子間で互いに水素結合して凝集することが多いも、疎水化と添加材の含浸によって繊維間の滑りがさらによくなり、塊になり難く分散性が良好であるため、短繊維の濃度が均一となり、耐流動性、耐摩耗性及び耐クラック性の向上を図ることができる。   Since short fibers are made of plant fibers, the plant fibers contain cellulose, and the cellulose contains many hydroxyl groups and often agglomerates due to hydrogen bonding between molecules. Since the slippage of the fibers is further improved and the dispersibility is good due to the difficulty of forming a lump, the concentration of the short fibers becomes uniform, and the flow resistance, wear resistance and crack resistance can be improved.

添加材は、該添加材の全重量に対してナフテン系オイルが40〜70重量部、スチレン系熱可塑性エラストマーが20〜45重量部、ポリプロピレンが2〜30重量部含有するので、添加材のナフテン系オイルの含有率によって、ストレートアスファルトとの相溶性または親和性が向上し、含有率が40重量部未満では、ストレートアスファルトとの親和性が必ずしも十分に向上せず、70重量部を超えると他の成分(スチレン系熱可塑性エラストマー、ポリプロピレン)の含有率が少なくなり、全体の特性のバランスがとりにくくなる。また、スチレン系熱可塑性エラストマーの含有率によって、耐低温性の向上ができ、含有率が20重量部未満では、低温において硬くなりやすくなり、45重量部を超えると他の成分の含有率が少なくなる問題が生じる。一方、ポリプロピレンの含有率によって、耐磨耗性の向上ができ、含有率が2重量部未満では耐磨耗性が必ずしも十分に向上しない。30重量部を超えると、他の成分の含有率が少なくなりやすい。   The additive contains 40 to 70 parts by weight of naphthenic oil, 20 to 45 parts by weight of styrene thermoplastic elastomer, and 2 to 30 parts by weight of polypropylene based on the total weight of the additive. The compatibility or affinity with straight asphalt is improved depending on the content of the base oil. If the content is less than 40 parts by weight, the affinity with straight asphalt does not necessarily improve sufficiently. The content of these components (styrene-based thermoplastic elastomer, polypropylene) is reduced, making it difficult to balance the overall characteristics. Also, the low-temperature resistance can be improved by the content of the styrenic thermoplastic elastomer. When the content is less than 20 parts by weight, it tends to be hard at low temperatures, and when it exceeds 45 parts by weight, the content of other components is small. Problem arises. On the other hand, the wear resistance can be improved by the content of polypropylene, and if the content is less than 2 parts by weight, the wear resistance is not necessarily improved sufficiently. If it exceeds 30 parts by weight, the content of other components tends to decrease.

骨材と、ストレートアスファルトとが混合されたアスファルト混合物の製造方法において、骨材と、ストレートアスファルトとを150〜180℃で混合した後に、アスファルト用添加物を添加し、さらに5〜60秒混合するが、180℃を超えると添加材と、ストレートアスファルトとが混ざりすぎ、必ずしも2層構造とならないため、加熱温度は180℃以下が望ましい。また、150℃未満では必ずしも十分に混合しないので150℃以上が望ましい。一方、アスファルト添加物を添加した後の混合時間が5〜60秒であるのは、60秒を超えると2層構造となりにくく、5秒未満では必ずしも十分に混合しないため、上記範囲が好ましいと言える。   In the method for producing an asphalt mixture in which aggregate and straight asphalt are mixed, after the aggregate and straight asphalt are mixed at 150 to 180 ° C., an additive for asphalt is added and further mixed for 5 to 60 seconds. However, if the temperature exceeds 180 ° C., the additive and straight asphalt are too mixed, and the two-layer structure is not necessarily obtained. Therefore, the heating temperature is desirably 180 ° C. or less. Moreover, if it is less than 150 degreeC, it will not necessarily mix sufficiently, Therefore 150 degreeC or more is desirable. On the other hand, the mixing time after addition of the asphalt additive is 5 to 60 seconds. When the time exceeds 60 seconds, a two-layer structure is hardly formed, and when the time is less than 5 seconds, the mixing is not always sufficient, so the above range is preferable. .

発明の実施の形態BEST MODE FOR CARRYING OUT THE INVENTION

以下、本発明の実施の形態につき図面に示す実施例を参照して説明する。図1は本発明に係るアスファルト用添加物の概要断面図、図2はアスファルト用添加物の製造工程図である。図1及び図2において、アスファルト用添加物1は、ストレートアスファルトに対して親和性を有する添加材2と、疎水化処理された短繊維3からなる綿状の繊維物3aとを含み、繊維物3aを浸漬用容器A内の添加材2中に浸漬して、繊維物3aの短繊維3に添加材2を含浸させて含浸混合物4となしている。その後、含浸混合物4を浸漬用容器Aから取出し、含浸混合物4を包装袋5内に収容し、包装袋5を密閉状態とすることによって、アスファルト用添加物1を製造している。   Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings. FIG. 1 is a schematic sectional view of an asphalt additive according to the present invention, and FIG. 2 is a production process diagram of the asphalt additive. 1 and 2, the asphalt additive 1 includes an additive 2 having an affinity for straight asphalt and a cotton-like fiber 3a made of short fibers 3 that have been hydrophobized. 3a is immersed in the additive 2 in the container A for immersion, and the short fiber 3 of the fiber 3a is impregnated with the additive 2 to form an impregnation mixture 4. Then, the asphalt additive 1 is manufactured by taking out the impregnation mixture 4 from the container A for immersion, accommodating the impregnation mixture 4 in the packaging bag 5, and making the packaging bag 5 airtight.

アスファルト混合物を製造するには、図3に示すように、骨材6と、ストレートアスファルト7とをミキサーMに投入して150〜180℃で混合した後に、アスファルト用添加物1を投入し、さらに5〜60秒混合する。その後、図5に示すように、アスファルト混合物を舗装してアスファルト道路Dを形成する。この骨材6の全重量に対してストレートアスファルト7が例えば6.5〜8.5重量部、アスファルト用添加物1が例えば0.2〜0.6重量部の配合で添加される。このアスファルト混合物は、図4に示すように、骨材6の表面がストレートアスファルト7に覆われ、さらに短繊維3が均一分散された添加材2の被膜で覆われる形態となる。   In order to produce the asphalt mixture, as shown in FIG. 3, the aggregate 6 and the straight asphalt 7 are introduced into the mixer M and mixed at 150 to 180 ° C., and then the asphalt additive 1 is introduced. Mix for 5-60 seconds. Then, asphalt mixture D is paved as shown in FIG. The straight asphalt 7 is added in an amount of, for example, 6.5 to 8.5 parts by weight, and the asphalt additive 1 is added in an amount of, for example, 0.2 to 0.6 parts by weight with respect to the total weight of the aggregate 6. As shown in FIG. 4, the asphalt mixture has a form in which the surface of the aggregate 6 is covered with straight asphalt 7 and further covered with a coating of the additive 2 in which the short fibers 3 are uniformly dispersed.

この結果、ストレートアスファルト7の表面を、短繊維3が分散した添加材2の薄膜が保護し、かつ短繊維3が骨材6とストレートアスファルト7との境界個所や、ストレートアスファルト7と添加材2との境界個所に介在して機械的補強材として機能するため、耐磨耗性や耐久性などの諸特性をバランスよく向上させることができる。また、骨材6の粒度分布が後述(表2参照)のようにされているので、強度、空隙率、表面粗さが優れている。骨材6の全重量に対してストレートアスファルト7が6.5重量部未満では接着強度が低く、8.5重量部を超えるとコストアップになりやすい。また、アスファルト用添加物1が0.2重量部未満では耐低温性や耐劣化性などの諸特性を必ずしも十分に向上できず、0.6重量部を超えるとコストアップになりやすい。一方、上記ストレートアスファルト7の針入れ度は60/80または80/100であることが好ましい。   As a result, the surface of the straight asphalt 7 is protected by the thin film of the additive 2 in which the short fibers 3 are dispersed, and the short fiber 3 is a boundary portion between the aggregate 6 and the straight asphalt 7 or the straight asphalt 7 and the additive 2. Since it functions as a mechanical reinforcing material by interposing at the boundary portion, it is possible to improve various characteristics such as wear resistance and durability in a balanced manner. Further, since the particle size distribution of the aggregate 6 is set as described later (see Table 2), the strength, the porosity, and the surface roughness are excellent. If the straight asphalt 7 is less than 6.5 parts by weight with respect to the total weight of the aggregate 6, the adhesive strength is low, and if it exceeds 8.5 parts by weight, the cost tends to increase. Further, if the asphalt additive 1 is less than 0.2 parts by weight, various properties such as low temperature resistance and deterioration resistance cannot be sufficiently improved, and if it exceeds 0.6 parts by weight, the cost tends to increase. On the other hand, the penetration of the straight asphalt 7 is preferably 60/80 or 80/100.

骨材6は砕石、スクリーニングス、粗砂、石粉からなる。骨材6の全重量に対して、砕石が22〜42重量部、スクリーニングスが18〜38重量部、粗砂が24〜44重量部、石粉が2〜10重量部の組成とされている。   Aggregate 6 consists of crushed stone, screenings, coarse sand, and stone powder. The total weight of the aggregate 6 is 22 to 42 parts by weight of crushed stone, 18 to 38 parts by weight of screenings, 24 to 44 parts by weight of coarse sand, and 2 to 10 parts by weight of stone powder.

添加材2は、該添加材2の全重量に対してナフテン系オイルが40〜70重量部、スチレン系熱可塑性エラストマーが20〜45重量部、ポリプロピレンが2〜30重量部の組成とされている。スチレン系熱可塑性エラストマーはスチレン−ブタジエン−スチレン共重合体であり、特に、スチレンとブタジエンの重量比が、スチレン1重量部に対してブタジエンが1.6〜3.0重量部とされている。
また、ポリプロピレンの平均分子量は、ストレートアスファルト7との相溶性または親和性の向上の点から、1000〜10000であることが好ましい。より好ましくは1000〜8000であり、さらに好ましくは2000〜5000である。また、添加材2はストレートアスファルト7の全重量部に対して0.05〜5.0重量部混合する。好ましくは0.1〜1.0重量部である。0.05重量部未満であると、舗装されたアスファルトの耐流動性、耐摩耗性の効果が得られない。5.0重量部を超えても前記効果は変わらない。
The additive 2 is composed of 40 to 70 parts by weight of naphthenic oil, 20 to 45 parts by weight of styrene thermoplastic elastomer, and 2 to 30 parts by weight of polypropylene with respect to the total weight of the additive 2. . The styrenic thermoplastic elastomer is a styrene-butadiene-styrene copolymer. In particular, the weight ratio of styrene to butadiene is 1.6 to 3.0 parts by weight of butadiene with respect to 1 part by weight of styrene.
Moreover, it is preferable that the average molecular weight of a polypropylene is 1000-10000 from the point of a compatibility or affinity improvement with the straight asphalt 7. FIG. More preferably, it is 1000-8000, More preferably, it is 2000-5000. The additive 2 is mixed in an amount of 0.05 to 5.0 parts by weight with respect to the total weight part of the straight asphalt 7. Preferably it is 0.1-1.0 weight part. If it is less than 0.05 parts by weight, the effects of flow resistance and wear resistance of the paved asphalt cannot be obtained. Even if it exceeds 5.0 parts by weight, the above effect is not changed.

繊維物3aにおける短繊維3は、主成分がセルロースによって構成される樹木、作物などから得られる繊維や、古紙、食品廃棄物から得られる再生繊維が挙げられる。短繊維3の一般性状は、一例としてαセルロース含有量が約80%、灰分量が10%以下、水分量が7%以下、酸性度(pH)が6〜8、かさ密度が32g/Lであり、最長繊維長が約5mm、平均繊維長が約1.1mmのものが挙げられる。また、ストレートアスファルト7の全重量部に対して繊維物3aを0.05〜5.0重量部混合する。好ましくは0.1〜1.0重量部である。0.05重量部未満であると、セルロースの含有量が少なすぎて、舗装されたアスファルトの耐流動性、耐摩耗性の効果が得られない。5.0重量部を超えても前記効果は変わらない。また、繊維物3aの疎水化は、シリコン樹脂、フッソ樹脂系の撥水剤などを用いて処理している。   Examples of the short fibers 3 in the fiber 3a include fibers obtained from trees, crops, and the like whose main component is cellulose, and recycled fibers obtained from waste paper and food waste. The general properties of the short fiber 3 are, for example, an α cellulose content of about 80%, an ash content of 10% or less, a moisture content of 7% or less, an acidity (pH) of 6-8, and a bulk density of 32 g / L. The longest fiber length is about 5 mm, and the average fiber length is about 1.1 mm. Further, 0.05 to 5.0 parts by weight of the fiber 3a is mixed with respect to the total parts by weight of the straight asphalt 7. Preferably it is 0.1-1.0 weight part. If it is less than 0.05 parts by weight, the cellulose content is too small, and the effects of flow resistance and wear resistance of the paved asphalt cannot be obtained. Even if it exceeds 5.0 parts by weight, the above effect is not changed. Further, the hydrophobicity of the fiber 3a is processed using a silicon resin, a fluorine resin water repellent or the like.

包装袋5は合成樹脂製であり、一例として塩化ビニル、ポリエチレン、ポリプロピレン、ポリスチレンなどが挙げられ、その厚みを0.03〜0.06mmとなしている。この厚みによって内容物の品質低下が防止され、かつアスファルト混合物の製造時、包装袋5の溶けが良好であるため、繊維物3aにおける短繊維3の分散性が損なわれない。包装袋5の厚みが0.03mm未満では、含浸させた添加材2が包装袋5から滲み出てしまい、0.06mmを越えると包装袋5が混合時に溶け難くなり、アスファルトへの短繊維3の分散性が悪化する。   The packaging bag 5 is made of a synthetic resin, and examples thereof include vinyl chloride, polyethylene, polypropylene, polystyrene, and the thickness thereof is 0.03 to 0.06 mm. This thickness prevents deterioration of the quality of the contents, and at the time of manufacturing the asphalt mixture, the melting of the packaging bag 5 is good, so that the dispersibility of the short fibers 3 in the fiber 3a is not impaired. When the thickness of the packaging bag 5 is less than 0.03 mm, the impregnated additive 2 oozes out from the packaging bag 5, and when it exceeds 0.06 mm, the packaging bag 5 becomes difficult to melt during mixing, and the short fibers 3 to asphalt 3. The dispersibility of becomes worse.

アスファルト混合物の製造方法では、例えば150〜180℃程度の高温で混合するが、その理由は、180℃を超えるとアスファルト用添加物1と、ストレートアスファルト7とが混ざりすぎ、必ずしも2層構造とならないためである。また、150℃未満では必ずしも十分に混合しない。一方、アスファルト用添加物材1を添加した後の混合時間が5〜60秒であるのは、60秒を超えると2層構造となりにくく、5秒未満では必ずしも十分に混合しないためである。より望ましい混合時間は5〜50秒であり、さらに望ましくは10〜30秒である。   In the manufacturing method of the asphalt mixture, for example, mixing is performed at a high temperature of about 150 to 180 ° C. The reason is that if it exceeds 180 ° C., the additive 1 for asphalt and the straight asphalt 7 are too mixed and do not necessarily have a two-layer structure. Because. Moreover, if it is less than 150 degreeC, it will not necessarily mix sufficiently. On the other hand, the reason why the mixing time after adding the asphalt additive 1 is 5 to 60 seconds is that when the time exceeds 60 seconds, it becomes difficult to form a two-layer structure, and when the time is less than 5 seconds, mixing is not always sufficient. A more desirable mixing time is 5 to 50 seconds, and further desirably 10 to 30 seconds.

以下、本発明の効果を確認するために行った実験について説明する。
まず、アスファルト用添加物1に使用するための添加材2を得るために、ナフテン系オイル、スチレン系熱可塑性エラストマー、ポリプロピレンを下記表1のように配合した。
Hereinafter, experiments conducted for confirming the effects of the present invention will be described.
First, in order to obtain the additive 2 for use in the asphalt additive 1, naphthenic oil, styrene thermoplastic elastomer, and polypropylene were blended as shown in Table 1 below.

Figure 0004473896
Figure 0004473896

表1中の成分は、以下のものを用いた。
SBS:スチレン−ブタジエン−スチレン共重合体、旭化成株式会社製、アサプレンT437、スチレン/ブタジエン比 30/70。
ポリプロピレン:三洋化成工業株式会社製、ビスコール660。
The following components were used in Table 1.
SBS: Styrene-butadiene-styrene copolymer, manufactured by Asahi Kasei Corporation, Asaprene T437, styrene / butadiene ratio 30/70.
Polypropylene: manufactured by Sanyo Chemical Industries, Ltd., biscor 660.

アスファルト用添加物1を得るために、添加材2を繊維物3aの短繊維3に含浸させた含浸混合物2を、厚みを0.05mmで塩化ビニル製の包装袋5内に収容した。添加材2は、「商品名:ミノコート、三野道路株式会社製」を使用し、繊維物3aは、「商品名:トップセル、株式会社エムアイテック製」を使用した。また、アスファルト用添加物1の全重量に対して、添加材2が75重量部、繊維物3aが25重量部、包装袋5が0.001重量部とされる配合にした。   In order to obtain the additive 1 for asphalt, the impregnation mixture 2 obtained by impregnating the short fiber 3 of the fiber 3a with the additive 2 was accommodated in a packaging bag 5 made of vinyl chloride with a thickness of 0.05 mm. The additive 2 used was “trade name: Minocoat, manufactured by Mino Road Co., Ltd.”, and the textile 3a was “trade name: Top Cell, manufactured by MITEC Corporation”. Further, the additive 2 was 75 parts by weight, the fiber 3a was 25 parts by weight, and the packaging bag 5 was 0.001 part by weight with respect to the total weight of the asphalt additive 1.

7号砕石、スクリーニングス、粗砂からなる骨材6を150℃において混合した後、針入れ度が60/80のストレートアスファルト7を添加して、骨材6の表面がストレートアスファルト7の薄膜で覆われている混合物を得た。その混合物にアスファルト用添加物1を投入して添加した後、20秒攪拌した。このようにして、本発明に属するアスファルト混合物のサンプルを作成した。   Aggregate 6 consisting of No. 7 crushed stone, screenings, and coarse sand is mixed at 150 ° C., then straight asphalt 7 with a needle penetration of 60/80 is added, and the surface of aggregate 6 is a thin film of straight asphalt 7 A covered mixture was obtained. The asphalt additive 1 was added to the mixture and added, followed by stirring for 20 seconds. In this way, a sample of the asphalt mixture belonging to the present invention was prepared.

また、各成分の配合割合として、7号砕石(岐阜県多治見市 日章産業製)が32重量部、スクリーニングス(岐阜県多治見市 日章産業製)が25重量部、粗砂(岐阜県中津川市恵那峡サンド製)が34重量部、石粉(岐阜県武儀郡 尾花屋産業製)が6重量部、ストレートアスファルト60/80(昭和シェル石油製)が7.5重量部、アスファルト用添加物1が0.4重量部とされる配合にした。なお、骨材6の粒度および加算通過百分率は表2の通りであった。   In addition, as a mixing ratio of each component, No. 7 crushed stone (manufactured by Nissho Sangyo, Tajimi-shi, Gifu) is 32 parts by weight, screenings (manufactured by Nissho Sangyo, Tajimi-shi, Gifu) is 25 parts by weight, coarse sand (Nakatsugawa, Gifu) City Enakyo Sand) 34 parts by weight, stone powder (Ohanaya Industry Co., Gifu Prefecture) 6 parts by weight, straight asphalt 60/80 (Showa Shell Sekiyu) 7.5 parts by weight, asphalt additive 1 The formulation was 0.4 parts by weight. In addition, the particle size and the addition passing percentage of the aggregate 6 are as shown in Table 2.

Figure 0004473896
Figure 0004473896

アスファルト混合物の物性として表3に示す。このように、アスファルトに求められる諸特性が優れ、高度にバランスがとれていることが確認できた。これらの物性の中でも特に曲げ強度及び破断ひずみが大きいことが分かる。   The physical properties of the asphalt mixture are shown in Table 3. Thus, it was confirmed that various properties required for asphalt were excellent and highly balanced. Among these physical properties, it can be seen that bending strength and breaking strain are particularly large.

Figure 0004473896
Figure 0004473896

本発明に係るアスファルト用添加物の概要断面図。The outline sectional view of the additive for asphalt concerning the present invention. アスファルト添加物の製造工程を示す図。The figure which shows the manufacturing process of an asphalt additive. アスファルト混合物の製造工程を示す図。The figure which shows the manufacturing process of an asphalt mixture. アスファルト混合物の概要図。Schematic diagram of asphalt mixture. アスファルト道路を示す図。The figure which shows asphalt road.

符号の説明Explanation of symbols

1 ストレートアスファルト用添加物
2 添加材
3 短繊維
3a 繊維物
4 含浸混合物
5 包装袋
6 骨材
7 ストレートアスファルト
DESCRIPTION OF SYMBOLS 1 Additive for straight asphalt 2 Additive 3 Short fiber 3a Fiber 4 Impregnation mixture 5 Packaging bag 6 Aggregate 7 Straight asphalt

Claims (5)

ストレートアスファルトに対して親和性を有する添加材と、
疎水化処理された短繊維からなる綿状の繊維物とを含み、
前記繊維物に前記添加材を含浸させて含浸混合物となし、該含浸混合物を合成樹脂製の包装袋内に収容し、該包装袋を加熱下の前記ストレートアスファルトに投入して用いることを特徴とするアスファルト用添加物。
An additive having an affinity for straight asphalt;
Including a cotton-like fiber made of short fibers subjected to hydrophobic treatment,
The fiber material is impregnated with the additive to form an impregnated mixture, the impregnated mixture is accommodated in a synthetic resin packaging bag, and the packaging bag is put into the heated straight asphalt for use. Asphalt additive.
前記包装袋の厚みを、0.03〜0.06mmとなしたことを特徴とする請求項1に記載のアスファルト用添加物。   The asphalt additive according to claim 1, wherein the packaging bag has a thickness of 0.03 to 0.06 mm. 前記短繊維は、植物繊維からなることを特徴とする請求項1又は2に記載のアスファルト用添加物。   The asphalt additive according to claim 1 or 2, wherein the short fibers are made of plant fibers. 前記添加材は、該添加材の全重量に対してナフテン系オイルを40〜70重量部、スチレン系熱可塑性エラストマーを20〜45重量部、ポリプロピレンを2〜30重量部含有することを特徴とする請求項1ないし3のいずれか1項に記載のアスファルト用添加物。   The additive comprises 40 to 70 parts by weight of naphthenic oil, 20 to 45 parts by weight of styrene thermoplastic elastomer, and 2 to 30 parts by weight of polypropylene based on the total weight of the additive. The additive for asphalt according to any one of claims 1 to 3. 骨材と、ストレートアスファルトとが混合されたアスファルト混合物の製造方法において、前記骨材と、前記ストレートアスファルトとを150〜180℃で混合した後に、請求項1ないし4のいずれか1項に記載のアスファルト用添加物を添加し、さらに5〜60秒混合することを特徴とするアスファルト混合物の製造方法。   In the manufacturing method of the asphalt mixture with which the aggregate and the straight asphalt were mixed, after mixing the said aggregate and the said straight asphalt at 150-180 degreeC, It is any one of Claims 1 thru | or 4. A method for producing an asphalt mixture, comprising adding an additive for asphalt and further mixing for 5 to 60 seconds.
JP2007191923A 2007-07-24 2007-07-24 Asphalt additive and method for producing asphalt mixture Active JP4473896B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007191923A JP4473896B2 (en) 2007-07-24 2007-07-24 Asphalt additive and method for producing asphalt mixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007191923A JP4473896B2 (en) 2007-07-24 2007-07-24 Asphalt additive and method for producing asphalt mixture

Publications (2)

Publication Number Publication Date
JP2009029839A JP2009029839A (en) 2009-02-12
JP4473896B2 true JP4473896B2 (en) 2010-06-02

Family

ID=40400712

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007191923A Active JP4473896B2 (en) 2007-07-24 2007-07-24 Asphalt additive and method for producing asphalt mixture

Country Status (1)

Country Link
JP (1) JP4473896B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5075957B2 (en) * 2010-08-27 2012-11-21 三野道路株式会社 Additive for asphalt, asphalt emulsion, and method for producing asphalt mixture
JP5959045B2 (en) * 2012-03-06 2016-08-02 日本道路株式会社 Pavement location and repaving method for pavement location
US11066558B2 (en) 2017-07-21 2021-07-20 Kao Corporation Asphalt composition, method for producing same and additive for asphalt
JP7417934B2 (en) 2020-03-05 2024-01-19 大成ロテック株式会社 Asphalt modification material

Also Published As

Publication number Publication date
JP2009029839A (en) 2009-02-12

Similar Documents

Publication Publication Date Title
Selvin et al. Mechanical properties of titanium dioxide-filled polystyrene microcomposites
Ameli et al. Laboratory evaluation of the effect of coal waste ash (CWA) and rice husk ash (RHA) on performance of asphalt mastics and Stone matrix asphalt (SMA) mixture
Alhamali et al. Physical and rheological characteristics of polymer modified bitumen with nanosilica particles
Agudelo et al. Ground tire rubber and bitumen with wax and its application in a real highway
JP4473896B2 (en) Asphalt additive and method for producing asphalt mixture
Yaro et al. Performance evaluation of waste palm oil fiber reinforced stone matrix asphalt mixtures using traditional and sequential mixing processes
Zarei et al. Effect of nano-carbon black on the mechanical properties of asphalt mixtures
JP5075957B2 (en) Additive for asphalt, asphalt emulsion, and method for producing asphalt mixture
Babalghaith et al. Optimization of mixing time for polymer modified asphalt
El-Saikaly Study of the possibility to reuse waste plastic bags as a modifier for asphalt mixtures properties (Binder Course Layer)
Taher et al. Moisture susceptibility of hot mix asphalt mixtures modified by nano silica and subjected to aging process
Abdul-Mawjoud et al. Evaluation of SBR and PS-modified asphalt binders and HMA mixtures containing such binders
Angelone et al. A comparative study of bituminous mixtures with recycled polyethylene added by dry and wet processes
Mehta et al. A review on the use of waste plastics in hot mix asphalt
Roshan et al. Laboratory Investigation of Micronized Lomashell Powder Effects on Asphalt Binder and Mix Performance.
Hinislioğlu et al. Effects of high density polyethylene on the permanent deformation of asphalt concrete
Rasheda et al. Application of nano-silica in rubber modified asphalt mix made with marginal aggregates
Al-Hadidy Evaluation of pyrolisis polypropylene modified asphalt paving materials
Al-Haydari et al. Durability and aging characteristics of sustainable paving mixture
Alsheyab et al. Effect of waste tire rubber on properties of asphalt cement and asphalt concrete mixtures: State of the art
Nazari et al. Laboratory Investigation of the Effect of Stone Mastic Asphalt Modified with SEBS Polymer and Cellulose Fibers on the Moisture Susceptibility
Thejaswi et al. Sugarcane Bagasse Fibers for Enhancing Moisture Susceptibility Properties in Stone Mastic Asphalt
Muniandy et al. Determination of rheological properties of bio mastic asphalt
Mohammadi et al. Effect of ethylene‐1‐butene copolymer on tensile properties and toughness of polypropylene/mica/organoclay hybrid nanocomposites
Ravi Shankar et al. Investigation on the Effect of Anti Stripping Additives on the Moisture Sensitivity of Bituminous Concrete

Legal Events

Date Code Title Description
A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090825

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20090825

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20100204

TRDD Decision of grant or rejection written
A975 Report on accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A971005

Effective date: 20100226

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100302

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100305

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20150312

Year of fee payment: 5

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 4473896

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

S201 Request for registration of exclusive licence

Free format text: JAPANESE INTERMEDIATE CODE: R314201

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250