JP4030732B2 - Regeneration additive for asphalt binder for paving - Google Patents
Regeneration additive for asphalt binder for paving Download PDFInfo
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- JP4030732B2 JP4030732B2 JP2001189098A JP2001189098A JP4030732B2 JP 4030732 B2 JP4030732 B2 JP 4030732B2 JP 2001189098 A JP2001189098 A JP 2001189098A JP 2001189098 A JP2001189098 A JP 2001189098A JP 4030732 B2 JP4030732 B2 JP 4030732B2
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Description
【０００１】
【発明の属する技術分野】
本発明は、舗装用アスファルト系バインダーの再生添加剤に関する。詳細には、一般舗装発生材または排水性舗装発生材から得られる再生骨材の表面に付着している劣化したアスファルトバインダーを排水性舗装用アスファルトバインダーへ再生するために適した再生添加剤に関する。
【０００２】
【従来の技術】
近年、骨材資源問題・廃棄物処理問題から舗装発生材の有効利用が叫ばれている。舗装発生材のリサイクルは、その多くが石油系重質油の添加によるストレートアスファルト混合物への再生が一般的である。また、特殊な再生用改質アスファルトの使用により舗装発生材を改質アスファルト混合物へと再生する方法も提案されてはいるものの、舗装発生材から得られた再生骨材と新規骨材との配合比率を限定した使用方法が一般的であり、またその施工実績の規模は小さいのが現状である。ましてや既存の石油系重質油または再生用改質アスファルトを使用して舗装発生材を排水性舗装混合物へと再生することを試みても、そのバインダー性状が排水性舗装用バインダーの規格を満たさず、満足な結果が得られないのが現状である。
【０００３】
【発明が解決しようとする課題】
本発明の目的は、一般舗装発生材・排水性舗装発生材の再生時に、再生混合物中の劣化したアスファルトバインダーが新規の排水性舗装用バインダーと実質的に同等の物理性状となることを可能とする再生添加剤を提供することにある。
【０００４】
【問題を解決するための手段】
すなわち、本発明は石油系重質油と熱可塑性エラストマーを構成成分として含有することを特徴とする劣化したアスファルトバインダーを排水性舗装用アスファルトバインダーへ再生するための再生添加剤に関する。
【０００５】
本発明の再生添加剤においては、石油系重質油１００重量部に対して熱可塑性エラストマーを８〜５０重量部含有することが好ましい。
【０００６】
本発明の再生添加剤においては、石油系重質油の６０℃における動粘度が８０〜８００ｍｍ2／ｓであることが好ましい。
【０００７】
本発明の再生添加剤においては、石油系重質油が、パラフィン基原油、ナフテン基原油、混合基原油等より得られる減圧蒸留残渣油、プロパンエキストラクト、フルフラールエキストラクト、フルフラールラフィネート及びメチルエチルケトンエキストラクトよりなる群から選択される重質油であることが好ましい。
【０００８】
本発明の再生添加剤においては、熱可塑性エラストマーがスチレンと他のモノマーとの共重合体であって、スチレン単位の含量が１０〜４５質量％であることが好ましい。
【０００９】
本発明の再生添加剤においては、熱可塑性エラストマーが、スチレンとブタジエンのトリブロック共重合体、またはスチレンとブタジエンのトリブロック共重合体とスチレンとブタジエンのジブロック共重合体の混合物であることが好ましい。
【００１０】
【発明の実施の形態】
以下に本発明を詳述する。
本発明に用いる石油系重質油は特に限定されないが、特に６０℃における動粘度が８０〜８００ｍｍ2／ｓの石油系重質油が好ましい。石油系重質油の６０℃における動粘度が８００ｍｍ2／ｓを超えると、熱可塑性エラストマー添加後の粘度が高くなり、作業性が悪くなる。一方、６０℃における動粘度が８０ｍｍ2／ｓ未満の場合、混合物の製造時に白煙が多く作業性、安全性が悪化する。
石油系重質油としては、例えばパラフィン基原油、ナフテン基原油、または混合基原油より得られる減圧蒸留残渣油、プロパンエキストラクト、フルフラールエキストラクト、フルフラールラフィネート及びメチルエチルケトンエキストラクトよりなる群から選択される重質油が好ましい例として挙げることができる。
【００１１】
本発明に用いられる熱可塑性エラストマーとしては、スチレンと他のモノマーを共重合して得られる熱可塑性エラストマーが好ましい。熱可塑性エラストマー中のスチレン単位の含量は１０〜４５質量％であることが好ましく、より好ましくは２０〜３０質量％である。熱可塑性エラストマー中のスチレン単位の含量が１０質量％未満であると再生後のアスファルトバインダーの６０℃粘度が新規排水性舗装用バインダーの規格を満足しないおそれがある。一方、熱可塑性エラストマー中のスチレン単位の含量が４５質量％を超えると再生後のアスファルトバインダーのフラース脆化点が上昇するおそれがある。
【００１２】
本発明に用いられる熱可塑性エラストマーの好ましい例としては、スチレン−ブタジエン−スチレンのトリブロック共重合体（ＳＢＳ）、スチレン−ブタジエン−スチレンのトリブロック共重合体とスチレン−ブタジエンのジブロック共重合体との混合物を挙げることができる。また、これらはスチレン−ブタジエンのランダム共重合体を含んでいても良い。
本発明に用いられる熱可塑性エラストマーの他の好ましい例としては、スチレン−イソプレン−スチレンブロック共重合体（ＳＩＳ）、スチレン−エチレン−ブタジエン−スチレンのブロック共重合体（ＳＥＢＳ）及びスチレン−ブタジエン−ブチレン−スチレンのブロック共重合体（ＳＢＢＳ）を挙げることができる。
これらは、単独もしくは混合して使用することができる。
【００１３】
さらに、前記した本発明に用いられる熱可塑性エラストマーには、スチレン−ブタジエンゴム、クロロプレンゴムおよび天然ゴム等のゴム、エチレン−エチルアクリレート共重合体（ＥＥＡ）、エチレン−酢酸ビニル共重合体（ＥＶＡ）などのエチレン系共重合体、あるいは脂肪族炭化水素樹脂、脂環族系炭化水素樹脂および芳香族炭化水素樹脂等の石油樹脂類を混合して用いることができる。この場合の混合割合は、熱可塑性エラストマー１００重量部に対して１００重量部以下が好ましい。
【００１４】
本発明において用いられる熱可塑性エラストマーのメルトフローレート（ＭＦＲ：２００℃・５ｋｇにて測定）は、好ましくは２０以下、より好ましくは１５以下である。熱可塑性エラストマーのメルトフローレートが２０を超えると再生後の排水性舗装用アスファルトバインダーの６０℃粘度が新規排水性舗装用バインダーの規格を満足しないおそれがある。
【００１５】
本発明の再生添加剤は、石油系重質油と熱可塑性エラストマーを構成成分として含有する組成物であり、石油系重質油と熱可塑性エラストマーの含有割合は石油系重質油１００重量部に対して、熱可塑性エラストマーが好ましくは８〜５０重量部、より好ましくは１５〜３０重量部である。熱可塑性エラストマーが８重量部未満では、再生後のアスファルトバインダーの６０℃粘度が新規排水性舗装用バインダーの規格を満足しないおそれがある。一方、熱可塑性エラストマーが５０重量部を超えると再生添加剤の粘度が高くなり、作業性および骨材との混合性が悪くなるなどの問題がある。
本発明の再生添加剤は、石油系重質油に熱可塑性エラストマーを添加し、好ましくは温度１５０〜２００℃で、通常２〜５時間攪拌することにより調製できる。
【００１６】
本発明の再生添加剤は、再生骨材に付着している劣化アスファルトバインダー１００重量部に対して、通常５〜３０重量部、好ましくは１０〜２０重量部を添加する（以降、この劣化アスファルトバインダーと再生添加剤の混合物を再生排水性舗装用バインダーと呼ぶ。）。
この再生排水性舗装用バインダーは単体だけでも使用可能であるが、劣化アスファルトバインダーの劣化の程度により新規の排水性舗装用バインダーを添加して使用することもできる。新規排水性舗装用バインダーの混合割合は、再生排水性舗装用バインダー１００重量部に対して、０〜９００重量部、好ましくは５０〜９００重量部、より好ましくは１００〜９００重量部である。
劣化アスファルトバインダーに再生添加剤を添加混合する時の温度は、通常の排水性舗装用アスファルトを製造する時の温度である１６０℃〜１９０℃程度で良く、また再生添加剤自体は室温〜１８０℃程度に加熱しておくこともできる。また再生添加剤を添加する時の混合時間は、通常の排水性舗装用アスファルト混合物を製造する時の混合時間程度で良く、通常４０秒から２分程度で十分である。
【００１７】
【発明の効果】
本発明の再生添加剤は、舗装発生材から得た再生骨材に付着した劣化アスファルトバインダーを新規排水性舗装用バインダーと実質的に同等の物性性状へと回復させることが可能である。
【００１８】
【実施例】
以下に実施例を挙げ、本発明を具体的に説明するが、本発明はこれらに限定されるものではない。
【００１９】
なお、実施例および比較例で用いた試験法は以下の通りである。
（１）動粘度：「舗装試験法便覧」（社団法人日本道路協会編、丸善（株）発行）に記載の「高温粘度試験方法」に準じた。
（２）薄膜加熱試験：ＪＩＳ Ｋ２２０７に記載の「薄膜加熱試験方法」に準じた。
（３）加圧促進劣化試験：「舗装試験法便覧別冊」（社団法人日本道路協会編）に記載の「加圧劣化容器を用いた舗装用バインダーの促進劣化試験方法」に準じた。
（４）針入度：ＪＩＳ Ｋ２２０７に準じた。
（５）軟化点：ＪＩＳ Ｋ２２０７に準じた。
（６）伸度：ＪＩＳ Ｋ２２０７に準じた。
（７）６０℃粘度：「舗装試験法便覧別冊」（社団法人日本道路協会編）に記載の「６０℃粘度試験方法」に準じた。
（８）タフネス：「舗装試験法便覧」（社団法人日本道路協会編）に記載の「タフネステナシティ試験法」に準じた。
（９）テナシティ：「舗装試験法便覧」（社団法人日本道路協会編）に記載の「タフネステナシティ試験法」に準じた。
【００２０】
（実施例１）
６０℃における動粘度が１００ｍｍ2／ｓのフルフラールエキストラクト１００重量部に対し、スチレン単位含量が３０質量％のＳＢＳを３０重量部添加し、１８０℃の加熱状態で３時間攪拌し、ＳＢＳを溶解分散して再生用添加剤Ａを調整した。
次に、市販の排水性舗装用バインダーに薄膜加熱試験（ＴＦＯＴ）を実施し、さらに米国ＳＨＲＰ規格試験である加圧促進劣化試験（ＰＡＶ）を実施することにより劣化排水性舗装用バインダーを得た。
市販の新規排水性舗装用バインダー７０重量部、前記劣化排水性舗装用バインダー３０重量部、および再生添加剤Ａ３重量部をステンレスビーカーにとり、１８０℃で９０秒間攪拌混合した。
得られたバインダーの性状は表１に示すように、日本改質アスファルト協会が定める排水性バインダー規格を全て満足し、十分な性状が得られた。
【００２１】
（実施例２）
６０℃における動粘度が１００ｍｍ2／ｓのフルフラールエキストラクト１００重量部に対し、スチレン単位含量が３０質量％のＳＢＳを５０重量部添加し、１８０℃の加熱状態で３時間攪拌し、ＳＢＳを溶解分散して再生用添加剤Ｂを調整した。
市販の新規排水性舗装用バインダー５０重量部、実施例１で得た劣化排水性舗装用バインダー５０重量部、および再生添加剤Ｂ５重量部をステンレスビーカーにとり、１８０℃で９０秒間攪拌混合した。
得られたバインダーの性状は表１に示すように、日本改質アスファルト協会が定める排水性バインダー規格を全て満足し、十分な性状が得られた。
【００２２】
（実施例３）
市販のストレートアスファルト６０／８０に薄膜加熱試験（ＴＦＯＴ）を実施し、さらに米国ＳＨＲＰ規格試験である加圧促進劣化試験（ＰＡＶ）を実施することにより劣化ストレートアスファルトバインダーを得た。
市販の新規排水性舗装用バインダー８０重量部、前記劣化ストレートアスファルトバインダー２０重量部、および再生添加剤Ｂ２重量部をステンレスビーカーにとり、１８０℃で９０秒間攪拌混合した。
得られたバインダーの性状は表１に示すように、日本改質アスファルト協会が定める排水性バインダー規格を全て満足し、十分な性状が得られた。
【００２３】
（比較例１）
市販の新規排水性舗装用バインダー７０重量部、および実施例１で得た劣化排水性舗装用バインダー３０重量部をステンレスビーカーにとり、１８０℃で９０秒間攪拌混合した。
得られたバインダーは針入度が３７、１５℃における伸度が４５ｃｍであり、日本改質アスファルト協会が定める排水性バインダー規格を満足せず、十分な性状が得られなかった。
【００２４】
（比較例２）
市販の新規排水性舗装用バインダー５０重量部、実施例１で得た劣化排水性舗装用バインダー５０重量部、および再生添加剤としてフルフラールエキストラクト（再生添加剤Ｃ）５重量部をステンレスビーカーにとり、１８０℃で９０秒間攪拌混合した。
得られたバインダーは軟化点が７３℃、６０℃粘度が１７ｋＰａ・ｓ、タフネスが１９Ｎ・ｍであり、日本改質アスファルト協会が定める排水性バインダー規格を満足せず、十分な性状が得られなかった。
（比較例３）
市販の新規排水性舗装用バインダー８０重量部、実施例３で得た劣化ストレートアスファルトバインダー２０重量部、および再生添加剤Ｃ２重量部をステンレスビーカーにとり、１８０℃で９０秒間攪拌混合した。
得られたバインダーは６０℃粘度が１ｋＰａ・ｓ、タフネス１７Ｎ・ｍ、テナシティ１３Ｎ・ｍであり、日本改質アスファルト協会が定める排水性バインダー規格を満足せず、十分な性状が得られなかった。
【００２５】
【表１】
BACKGROUND OF THE INVENTION
The present invention relates to a regeneration additive for an asphalt binder for paving. More specifically, the present invention relates to a regenerative additive suitable for regenerating a deteriorated asphalt binder adhering to the surface of a regenerated aggregate obtained from a general pavement generating material or a drainable pavement generating material into a drainage pavement asphalt binder.
[0002]
[Prior art]
In recent years, effective use of pavement generated materials has been screamed because of aggregate resource problems and waste disposal problems. Most of the recycling of pavement generating materials is generally regenerated into a straight asphalt mixture by adding petroleum heavy oil. In addition, although a method for regenerating pavement generated material into a modified asphalt mixture by using special modified asphalt for recycling is proposed, the combination of recycled aggregate obtained from pavement generated material and new aggregate The method of use with a limited ratio is common, and the current scale of construction is small. Even if we try to regenerate the pavement material into drainage pavement mixture using existing heavy petroleum oil or reclaimed modified asphalt, the binder properties do not meet the standards for drainage pavement binders. Currently, satisfactory results cannot be obtained.
[0003]
[Problems to be solved by the invention]
The purpose of the present invention is to allow the deteriorated asphalt binder in the recycled mixture to have substantially the same physical properties as the new drainage pavement binder during the regeneration of the general pavement generator / drainage pavement generator. It is to provide a regenerative additive.
[0004]
[Means for solving problems]
That is, the present invention relates to a regenerative additive for regenerating a deteriorated asphalt binder characterized by containing petroleum heavy oil and a thermoplastic elastomer as constituents into a drainage pavement asphalt binder.
[0005]
The regeneration additive of the present invention preferably contains 8 to 50 parts by weight of a thermoplastic elastomer with respect to 100 parts by weight of petroleum heavy oil.
[0006]
In the regenerative additive of the present invention, the kinematic viscosity at 60 ° C. of the heavy petroleum oil is preferably 80 to 800 mm 2 / s.
[0007]
In the regenerative additive of the present invention, the petroleum heavy oil is a vacuum distillation residue oil, propane extract, furfural extract, furfural raffinate, and methyl ethyl ketone extract obtained from paraffinic crude oil, naphthenic crude oil, mixed base crude oil, etc. A heavy oil selected from the group consisting of:
[0008]
In the regeneration additive of the present invention, the thermoplastic elastomer is preferably a copolymer of styrene and another monomer, and the content of styrene units is preferably 10 to 45% by mass.
[0009]
In the regeneration additive of the present invention, the thermoplastic elastomer may be a mixture of a styrene and butadiene triblock copolymer, or a mixture of a styrene and butadiene triblock copolymer and a styrene and butadiene diblock copolymer. preferable.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention is described in detail below.
The petroleum heavy oil used in the present invention is not particularly limited, but a petroleum heavy oil having a kinematic viscosity at 60 ° C. of 80 to 800 mm 2 / s is particularly preferable. When the kinematic viscosity at 60 ° C. of the petroleum heavy oil exceeds 800 mm 2 / s, the viscosity after the addition of the thermoplastic elastomer increases, and the workability deteriorates. On the other hand, when the kinematic viscosity at 60 ° C. is less than 80 mm 2 / s, white smoke is large during the production of the mixture, and workability and safety deteriorate.
The petroleum heavy oil is selected from the group consisting of, for example, vacuum distillation residue oil obtained from paraffinic crude oil, naphthenic crude oil, or mixed crude oil, propane extract, furfural extract, furfural raffinate, and methyl ethyl ketone extract. Heavy oil can be mentioned as a preferred example.
[0011]
The thermoplastic elastomer used in the present invention is preferably a thermoplastic elastomer obtained by copolymerizing styrene and other monomers. The content of styrene units in the thermoplastic elastomer is preferably 10 to 45% by mass, more preferably 20 to 30% by mass. If the content of the styrene unit in the thermoplastic elastomer is less than 10% by mass, the regenerated asphalt binder may have a viscosity at 60 ° C. that does not satisfy the standards for a new drainage pavement binder. On the other hand, if the content of the styrene unit in the thermoplastic elastomer exceeds 45% by mass, there is a possibility that the fructose embrittlement point of the asphalt binder after regeneration is increased.
[0012]
Preferred examples of the thermoplastic elastomer used in the present invention include a styrene-butadiene-styrene triblock copolymer (SBS), a styrene-butadiene-styrene triblock copolymer, and a styrene-butadiene diblock copolymer. And a mixture thereof. These may contain a random copolymer of styrene-butadiene.
Other preferable examples of the thermoplastic elastomer used in the present invention include styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butadiene-styrene block copolymer (SEBS), and styrene-butadiene-butylene. -The block copolymer (SBBS) of styrene can be mentioned.
These can be used alone or in combination.
[0013]
Further, the thermoplastic elastomer used in the present invention includes rubbers such as styrene-butadiene rubber, chloroprene rubber and natural rubber, ethylene-ethyl acrylate copolymer (EEA), ethylene-vinyl acetate copolymer (EVA). Or a mixture of petroleum resins such as aliphatic hydrocarbon resins, alicyclic hydrocarbon resins, and aromatic hydrocarbon resins. In this case, the mixing ratio is preferably 100 parts by weight or less with respect to 100 parts by weight of the thermoplastic elastomer.
[0014]
The melt flow rate (MFR: measured at 200 ° C. and 5 kg) of the thermoplastic elastomer used in the present invention is preferably 20 or less, more preferably 15 or less. If the melt flow rate of the thermoplastic elastomer exceeds 20, the viscosity of the asphalt binder for drainage pavement after regeneration may not satisfy the standards for a new drainage pavement binder.
[0015]
The regeneration additive of the present invention is a composition containing petroleum heavy oil and thermoplastic elastomer as constituent components, and the content ratio of petroleum heavy oil and thermoplastic elastomer is 100 parts by weight of petroleum heavy oil. On the other hand, the thermoplastic elastomer is preferably 8 to 50 parts by weight, more preferably 15 to 30 parts by weight. If the thermoplastic elastomer is less than 8 parts by weight, the regenerated asphalt binder may not satisfy the standard for a new drainage pavement binder at 60 ° C. On the other hand, when the amount of the thermoplastic elastomer exceeds 50 parts by weight, there is a problem that the viscosity of the regenerative additive is increased and workability and mixing with the aggregate are deteriorated.
The regeneration additive of the present invention can be prepared by adding a thermoplastic elastomer to a petroleum heavy oil, and preferably stirring at a temperature of 150 to 200 ° C. for 2 to 5 hours.
[0016]
The regeneration additive of the present invention is usually added in an amount of 5 to 30 parts by weight, preferably 10 to 20 parts by weight with respect to 100 parts by weight of the degraded asphalt binder adhering to the recycled aggregate (hereinafter referred to as this degraded asphalt binder). And a mixture of recycled additives are called recycled drainage pavement binders).
This recycled drainage pavement binder can be used alone, but a new drainage pavement binder can also be added depending on the degree of deterioration of the deteriorated asphalt binder. The mixing ratio of the new drainage pavement binder is 0 to 900 parts by weight, preferably 50 to 900 parts by weight, and more preferably 100 to 900 parts by weight with respect to 100 parts by weight of the recycled drainage pavement binder.
The temperature at which the regenerative additive is added to and mixed with the deteriorated asphalt binder may be about 160 ° C. to 190 ° C., which is the temperature at which ordinary drainage pavement asphalt is produced, and the regenerated additive itself is room temperature to 180 ° C. It can also be heated to the extent. The mixing time for adding the regeneration additive may be about the mixing time for producing a normal drainage pavement asphalt mixture, and usually about 40 seconds to 2 minutes is sufficient.
[0017]
【The invention's effect】
The regenerated additive of the present invention can restore the deteriorated asphalt binder attached to the regenerated aggregate obtained from the pavement generating material to the physical properties substantially equivalent to the new drainage pavement binder.
[0018]
【Example】
EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.
[0019]
The test methods used in Examples and Comparative Examples are as follows.
(1) Kinematic Viscosity: According to “High Temperature Viscosity Test Method” described in “Handbook of Pavement Test Methods” (edited by Japan Road Association, published by Maruzen Co., Ltd.).
(2) Thin film heating test: According to “Thin film heating test method” described in JIS K2207.
(3) Pressurized accelerated deterioration test: Conforms to “Accelerated deterioration test method of pavement binder using pressure deteriorated container” described in “Pavement Test Method Handbook” (edited by Japan Road Association).
(4) Penetration: conforming to JIS K2207.
(5) Softening point: According to JIS K2207.
(6) Elongation: According to JIS K2207.
(7) Viscosity at 60 ° C .: According to “60 ° C. Viscosity Test Method” described in “Pavement Test Method Handbook” (edited by Japan Road Association).
(8) Toughness: In accordance with “Toughness Tensity Test Method” described in “Handbook of Pavement Test Method” (edited by the Japan Road Association).
(9) Tenacity: According to “Toughness Tenacity Test Method” described in “Handbook of Pavement Test Method” (edited by the Japan Road Association).
[0020]
Example 1
30 parts by weight of SBS having a styrene unit content of 30% by mass is added to 100 parts by weight of furfural extract having a kinematic viscosity of 100 mm 2 / s at 60 ° C., and stirred for 3 hours in a heated state at 180 ° C. to dissolve SBS. Dispersing additive A was prepared by dispersing.
Next, a thin film heating test (TFOT) was performed on a commercially available drainage pavement binder, and further, a pressurization accelerated deterioration test (PAV) which is a US SHRP standard test was performed to obtain a deteriorated drainage pavement binder. .
70 parts by weight of a commercially available new drainage pavement binder, 30 parts by weight of the above-mentioned deteriorated drainage pavement binder, and 3 parts by weight of regeneration additive A were placed in a stainless beaker and stirred and mixed at 180 ° C. for 90 seconds.
As shown in Table 1, the properties of the obtained binder satisfied all drainage binder standards established by the Japan Modified Asphalt Association, and sufficient properties were obtained.
[0021]
(Example 2)
50 parts by weight of SBS having a styrene unit content of 30% by mass is added to 100 parts by weight of furfural extract having a kinematic viscosity of 100 mm 2 / s at 60 ° C., and stirred for 3 hours in a heated state at 180 ° C. to dissolve SBS. Dispersing additive B was prepared by dispersing.
50 parts by weight of a commercially available new drainage pavement binder, 50 parts by weight of the deteriorated drainage pavement binder obtained in Example 1, and 5 parts by weight of regenerating additive B were placed in a stainless beaker and stirred and mixed at 180 ° C. for 90 seconds.
As shown in Table 1, the properties of the obtained binder satisfied all drainage binder standards established by the Japan Modified Asphalt Association, and sufficient properties were obtained.
[0022]
(Example 3)
A commercially available straight asphalt 60/80 was subjected to a thin film heating test (TFOT), and further subjected to a pressure accelerated deterioration test (PAV) which is a US SHRP standard test to obtain a deteriorated straight asphalt binder.
80 parts by weight of a commercially available new drainage pavement binder, 20 parts by weight of the above-described deteriorated straight asphalt binder, and 2 parts by weight of the regenerating additive B were placed in a stainless beaker and stirred and mixed at 180 ° C. for 90 seconds.
As shown in Table 1, the properties of the obtained binder satisfied all drainage binder standards established by the Japan Modified Asphalt Association, and sufficient properties were obtained.
[0023]
(Comparative Example 1)
70 parts by weight of a commercially available new drainage pavement binder and 30 parts by weight of the deteriorated drainage pavement binder obtained in Example 1 were placed in a stainless beaker and stirred and mixed at 180 ° C. for 90 seconds.
The obtained binder had a penetration of 37 and an elongation at 15 ° C. of 45 cm, did not satisfy the drainage binder standard established by the Japan Modified Asphalt Association, and did not have sufficient properties.
[0024]
(Comparative Example 2)
Take 50 parts by weight of a commercially available new drainage pavement binder, 50 parts by weight of the deteriorated drainage pavement binder obtained in Example 1, and 5 parts by weight of furfural extract (regeneration additive C) as a regeneration additive. The mixture was stirred and mixed at 180 ° C. for 90 seconds.
The obtained binder has a softening point of 73 ° C., a viscosity of 60 ° C. of 17 kPa · s, a toughness of 19 N · m, does not satisfy the drainage binder standard established by the Japan Modified Asphalt Association, and does not have sufficient properties. It was.
(Comparative Example 3)
80 parts by weight of a commercially available new drainage pavement binder, 20 parts by weight of the deteriorated straight asphalt binder obtained in Example 3 and 2 parts by weight of the regenerating additive C were placed in a stainless beaker and stirred and mixed at 180 ° C. for 90 seconds.
The obtained binder had a viscosity of 1 kPa · s at 60 ° C., a toughness of 17 N · m, and a tenacity of 13 N · m, did not satisfy the drainage binder standard established by the Japan Modified Asphalt Association, and did not have sufficient properties.
[0025]
[Table 1]
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
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| JP2001189098A JP4030732B2 (en) | 2001-06-22 | 2001-06-22 | Regeneration additive for asphalt binder for paving |
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| JP2001189098A JP4030732B2 (en) | 2001-06-22 | 2001-06-22 | Regeneration additive for asphalt binder for paving |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006233130A (en) * | 2005-02-28 | 2006-09-07 | Nippon Oil Corp | Granular regeneration additive composition for asphalt binder for paving |
| JP4856500B2 (en) * | 2006-08-29 | 2012-01-18 | 昭和シェル石油株式会社 | Asphalt binder |
| JP5180572B2 (en) * | 2007-12-13 | 2013-04-10 | ニチレキ株式会社 | Recycled porous asphalt pavement binder, pavement mixture and pavement using the same |
| KR100898393B1 (en) | 2009-02-09 | 2009-05-18 | (주)현대아스콘 | Reclaimed Ascon and Method of Making the Same |
| CN102924936A (en) * | 2012-11-09 | 2013-02-13 | 重庆市智翔铺道技术工程有限公司 | Bituminous cold reclaiming agent and application of bituminous cold reclaiming agent in cold reclaiming of bituminous concrete |
| CN103613943B (en) * | 2013-12-17 | 2016-09-07 | 海南大学 | Hot asphalt regenerative agent, Preparation Method And The Use |
| CN118562305A (en) * | 2024-04-19 | 2024-08-30 | 湖北省交通规划设计院股份有限公司 | A regeneration agent for factory-mixed hot regeneration, preparation method and application thereof |
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