JP2000186211A - Paving asphalt - Google Patents
Paving asphaltInfo
- Publication number
- JP2000186211A JP2000186211A JP10364103A JP36410398A JP2000186211A JP 2000186211 A JP2000186211 A JP 2000186211A JP 10364103 A JP10364103 A JP 10364103A JP 36410398 A JP36410398 A JP 36410398A JP 2000186211 A JP2000186211 A JP 2000186211A
- Authority
- JP
- Japan
- Prior art keywords
- asphalt
- pavement
- molecular weight
- elongation
- solvent deasphalting
- 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.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、舗装用アスファル
トに関する。詳しくは、特に、アスファルト舗装廃材の
リサイクル、即ち再生を繰り返した場合、繰り返し再生
後のアスファルトの１５℃伸度、または２５℃伸度を、
アスファルト舗装要網(社団法人日本道路協会)に記載さ
れている道路用アスファルトの規格値以上に回復しうる
舗装用アスファルトに関する。TECHNICAL FIELD The present invention relates to asphalt for paving. Specifically, in particular, when asphalt pavement waste material is recycled, that is, when repetition is repeated, the 15 ° C elongation or 25 ° C elongation of the asphalt after repeated regeneration is
The present invention relates to a pavement asphalt which can be recovered to a standard value of asphalt for roads described in Asphalt Pavement Network (Japan Road Association).
【０００２】[0002]
【従来の技術】昨今は資源・環境問題からの舗装発生材
の有効利用が叫ばれており、舗装発生材の再利用(リサ
イクル)が推進されている。使用済み舗装用アスファル
ト、特にアスファルト舗装廃材中のアスファルトを再生
し、繰り返し使用する場合には、再生後のアスファルト
の伸度が、道路用アスファルトの規格値を充足すること
が必要である。具体的には、ストレートアスファルト４
０／６０の場合、１５℃伸度が１０ｃｍ以上、ストレー
トアスファルト６０／８０、８０／１００、１００／１
２０の場合、１５℃伸度が１００ｃｍ以上、さらにスト
レートアスファルト２０／４０の場合、２５℃伸度が５
０ｃｍ以上に回復することが必要である。従来、このよ
うなアスファルト舗装廃材の再生にあたっては、例え
ば、ストレートアスファルト６０／８０、８０／１００
の場合、アスファルト再生添加剤、新たなアスファル
ト、またはこれら両者を添加する方法によって、再生後
のアスファルトの１５℃伸度が、道路舗装用アスファル
トの規格値である１００ｃｍ以上に回復させる試みがな
されている。しかし、従来の舗装用アスファルトにおい
ては、再生を繰り返した場合、繰り返し再生後のアスフ
ァルト伸度を規格値以上に回復させることが困難である
のが実状である。なお、再生、繰り返し再生により施工
した舗装体は、一般にひび割れが生じる懸念があるた
め、このひび割れ発生の指標と考えられている伸度の回
復は重要である。2. Description of the Related Art In recent years, effective use of pavement-generating materials due to resource and environmental issues has been called for, and the reuse (recycling) of pavement-generating materials has been promoted. When used asphalt for pavement, particularly asphalt in asphalt pavement waste material is reclaimed and used repeatedly, it is necessary that the elongation of the asphalt after regeneration satisfy the standard value of road asphalt. Specifically, straight asphalt 4
In the case of 0/60, elongation at 15 ° C. is 10 cm or more, straight asphalt 60/80, 80/100, 100/1
In the case of 20, the elongation at 15 ° C. is 100 cm or more, and in the case of straight asphalt 20/40, the elongation at 25 ° C. is 5
It is necessary to recover to 0 cm or more. Conventionally, when such asphalt pavement waste is regenerated, for example, straight asphalt 60/80, 80/100
In the case of asphalt, an asphalt regeneration additive, new asphalt, or a method of adding both of them, an attempt has been made to restore the elongation at 15 ° C. of the asphalt after regeneration to 100 cm or more, which is the standard value of asphalt for road pavement. I have. However, in the conventional asphalt for pavement, it is difficult to recover the asphalt elongation after repeated regeneration to a specified value or more when the regeneration is repeated. In addition, since there is a concern that cracks generally occur in the pavement body constructed by the regeneration and the repeated regeneration, it is important to recover the elongation, which is considered to be an index of the crack occurrence.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、使用
済み舗装用アスファルト、特にアスファルト舗装廃材の
再生および繰り返し再生後に、アスファルトの伸度が道
路用アスファルトの規格値以上に回復し得る舗装用アス
ファルトを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a pavement for which the elongation of asphalt can be restored to a value equal to or higher than a standard value for road asphalt after reclaiming and repeatedly reclaiming used asphalt, especially asphalt pavement waste material. To provide asphalt.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、上記課題
を解決するため鋭意検討を重ねた結果、アスファルトの
伸度は動的粘弾性試験で求められる損失正接（ｔａｎ
δ）と相関が高く、同一針入度のアスファルトで比較し
た場合、例えば、１５℃における損失正接（ｔａｎδ）
が大きなアスファルトほど、繰り返し再生後に、大きな
１５℃伸度の回復が見られることを見出した。さらにこ
の損失正接（ｔａｎδ）が大きなアスファルトを得るに
は、従来は利用価値が少ないとされていた溶剤脱れきア
スファルト、中でも平均分子量が２０００〜３０００の
溶剤脱れきアスファルトを特定割合で配合することが有
効であることを見出し、本発明を完成した。すなわち、
本発明によれば、舗装用アスファルトにおいて、平均分
子量２０００〜３０００の溶剤脱れきアスファルトを２
０〜８０重量％含み、かつ２５℃における針入度が２０
〜１２０、１５℃における複素弾性率（Ｇ*）と損失正
接（ｔａｎδ）との関係が２．０６ｅ-0.042G*≦ｔａｎ
δを満足することを特徴とする舗装用アスファルトが提
供される。The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, the elongation of asphalt was determined by a loss tangent (tan) determined by a dynamic viscoelasticity test.
δ) is high, and when compared with asphalt having the same penetration, for example, loss tangent (tan δ) at 15 ° C.
It has been found that asphalt having a larger asphalt has a larger recovery of 15 ° C. elongation after repeated regeneration. Furthermore, in order to obtain asphalt having a large loss tangent (tan δ), it is necessary to mix a solvent-removed asphalt having a low average utility value, in particular, a solvent-removed asphalt having an average molecular weight of 2000 to 3000 at a specific ratio. The inventors have found that the present invention is effective and completed the present invention. That is,
According to the present invention, in the asphalt for paving, a solvent deasphalted asphalt having an average molecular weight of 2000 to 3000 is used.
0-80% by weight and a penetration at 25 ° C. of 20
The relationship between the complex elastic modulus (G * ) and the loss tangent (tan δ) at １２０120 and 15 ° C. is 2.06e −0.042G * ≦ tan.
A pavement asphalt characterized by satisfying δ is provided.
【０００５】[0005]
【発明の実施の形態】以下本発明を更に詳細に説明す
る。本発明の舗装用アスファルトは、平均分子量２００
０〜３０００の溶剤脱れきアスファルト(以下、アスフ
ァルトＡという）を２０〜８０重量％、好ましくは３５
〜５５重量％含む。アスファルトＡの含有割合が８０重
量％を超える場合には、路面にひび割れが発生し易くな
る。一方、アスファルトＡの含有割合が２０重量％未満
の場合、再生時の伸度回復が小さくなる。ここで、アス
ファルトＡの平均分子量は、ゲル浸透クロマトグラフ法
（ＧＰＣ）により求められる重量平均分子量(Ｍｗ)の値
である。アスファルトＡを製造する原油の種類は特に限
定されず、例えば、パラフィン基原油、ナフテン基原
油、混合基原油等が挙げられる。アスファルトＡの製造
は、例えば、減圧蒸留残油からプロパン等を溶剤として
高粘度高級潤滑油成分(ブライトストック等)を抽出した
残渣分として得ることができる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. The pavement asphalt of the present invention has an average molecular weight of 200
0-3000 solvent deasphalted asphalt (hereinafter referred to as asphalt A) is 20-80% by weight, preferably 35% by weight.
-55% by weight. If the content of asphalt A exceeds 80% by weight, cracks are likely to occur on the road surface. On the other hand, when the content ratio of asphalt A is less than 20% by weight, recovery of elongation at the time of reproduction becomes small. Here, the average molecular weight of asphalt A is the value of the weight average molecular weight (Mw) determined by gel permeation chromatography (GPC). The type of crude oil for producing asphalt A is not particularly limited, and examples thereof include paraffin-based crude oil, naphthenic-based crude oil, and mixed-base crude oil. Asphalt A can be produced, for example, as a residue obtained by extracting a high-viscosity high-grade lubricating oil component (such as bright stock) from a vacuum distillation residue using propane or the like as a solvent.
【０００６】本発明の舗装用アスファルトにおいて、前
記アスファルトＡを除く残りのアスファルト成分として
は、平均分子量が２０００〜３０００以外の溶剤脱れき
アスファルト、常圧蒸留装置あるいは減圧蒸留装置で処
理して得られる、留出油、常圧蒸留残渣油、減圧蒸留残
渣油、ストレートアスファルト等が挙げられる。これら
の成分は１種又は２種以上混合して含有させることがで
きる。アスファルトＡ以外のアスファルト成分はこれら
に限定されるものではなく、例えば、溶剤アスファルト
より軟質な石油製品、半石油製品等が挙げられる。本発
明の舗装用アスファルトは、前記アスファルトＡを特定
割合で含有することに加えて特定の性状を有する。その
性状は、舗装用アスファルトの２５℃における針入度が
２０〜１２０、好ましくは４０〜１００であり、更に１
５℃における複素弾性率(Ｇ*)と損失正接(ｔａｎδ)と
の関係が２．０６ｅ-0.042G*≦ｔａｎδ、好ましくは
２．０６ｅ-0.042G*≦ｔａｎδ≦２．２０ｅ-0.016G*、
より好ましくは２．１０ｅ-0.034G*≦ｔａｎδ≦２．１
４ｅ-0.026G*の範囲を満たす性状である。舗装用アスフ
ァルトの２５℃における針入度が２０未満の場合には、
路面にひび割れが発生し易くなる。一方、前記針入度が
１２０を超える場合、交通荷重等によるわだち掘れが発
生し易くなる。更に舗装用アスファルトの１５℃におけ
る複素弾性率(Ｇ*)と損失正接(ｔａｎδ)との関係が
２．０６ｅ-0.042G*＞ｔａｎδである場合は、再生を繰
り返すに従いアスファルトの１５℃伸度が低下し、道路
舗装用アスファルトの規格値が充足できない。一方、ｔ
ａｎδ＞２．２０ｅ-0 .016G*である場合には、アスファ
ルトの弾性に対する粘性が強くなりすぎるため、わだち
掘れのでき易いアスファルトとなるため好ましくない。In the asphalt for pavement of the present invention, the remaining asphalt components other than the asphalt A are obtained by treating with solvent-free asphalt having an average molecular weight other than 2,000 to 3,000, an atmospheric distillation apparatus or a vacuum distillation apparatus. , Distillate, atmospheric distillation residue, vacuum distillation residue, straight asphalt and the like. These components can be contained alone or in combination of two or more. Asphalt components other than asphalt A are not limited to these, and include, for example, petroleum products and semi-petroleum products that are softer than solvent asphalt. The asphalt for paving of the present invention has a specific property in addition to the asphalt A being contained in a specific ratio. The properties of the asphalt for pavement are such that the penetration at 25 ° C. is 20 to 120, preferably 40 to 100, and 1
The relationship between the complex elastic modulus (G * ) and the loss tangent (tan δ) at 5 ° C. is 2.06 e −0.042 G * ≦ tan δ, preferably 2.06 e −0.042 G * ≦ tan δ ≦ 2.20 e −0.016 G * ,
More preferably, 2.10e- 0.034G * ≦ tanδ ≦ 2.1
It is a property satisfying the range of 4e -0.026G * . When the penetration of the asphalt for pavement at 25 ° C. is less than 20,
Cracks easily occur on the road surface. On the other hand, if the penetration exceeds 120, rutting due to traffic load or the like is likely to occur. Further, when the relationship between the complex elastic modulus (G * ) at 15 ° C. and the loss tangent (tan δ) of the asphalt for pavement is 2.06e −0.042G * > tan δ, as the regeneration is repeated, the elongation of the asphalt at 15 ° C. The standard value of asphalt for road pavement cannot be satisfied. On the other hand, t
anδ> If 2.20e -0 is .016G *, because the viscosity to the elasticity of the asphalt becomes too strong, it is not preferable because it becomes easy asphalt can of rutting.
【０００７】本発明のアスファルトの針入度及び伸度は
ＪＩＳＫ−２２０７に従って測定した値である。本発明
のアスファルトの複素弾性率（Ｇ*）及び損失正接（ｔ
ａｎδ）は、以下の方法により測定することができる。
まず、ＤＳＲ(Dynamic Shear Rheomter)(ASPHALT ANALY
ZER RAA(Rheometrics社製)を用いてアスファルトの動的
粘弾性状を測定する。つまり、ＤＳＲの２枚の平衡円盤
間にアスファルト試料を挟み、一方の円盤を一定周波数
で一定振動ひずみ（γ)下で正弦振動させ、試料を介し
て他方の円盤に伝わる正弦的応力(σ)、及び正弦的応力
(σ)と発生する振動ひずみ(γ)との間に生じる位相のず
れ(δ)を測定する。測定条件は、試料厚２ｍｍ、試料直
径８ｍｍ、角周波数１０ｒａｄ／ｓ、付与ひずみ０．３
％である。複素弾性率（Ｇ*）は、前記動的粘弾性状の
測定により発生した正弦的応力(σ)を振動ひずみ(γ)で
割った値をいう(Ｇ*＝σ／γ)。一方、損失正接（ｔａ
ｎδ）は、正弦的応力(σ)と振動ひずみ(γ)との間に生
じた位相のずれ(δ)の正接をいう。The penetration and elongation of the asphalt of the present invention are values measured according to JIS K-2207. Complex modulus (G * ) and loss tangent (t) of the asphalt of the present invention
anδ) can be measured by the following method.
First, DSR (Dynamic Shear Rheomter) (ASPHALT ANALY
The dynamic viscoelasticity of asphalt is measured using ZER RAA (manufactured by Rheometrics). In other words, an asphalt sample is sandwiched between two equilibrium disks of the DSR, one of the disks is sinusoidally vibrated at a constant frequency under a constant vibration strain (γ), and a sinusoidal stress (σ) transmitted to the other disk via the sample. , And sinusoidal stress
The phase shift (δ) between (σ) and the generated vibration strain (γ) is measured. The measurement conditions were as follows: sample thickness 2 mm, sample diameter 8 mm, angular frequency 10 rad / s, applied strain 0.3.
%. The complex elastic modulus (G * ) refers to a value obtained by dividing a sinusoidal stress (σ) generated by the dynamic viscoelasticity measurement by a vibration strain (γ) (G * = σ / γ). On the other hand, the loss tangent (ta
nδ) means the tangent of the phase shift (δ) generated between the sinusoidal stress (σ) and the vibration strain (γ).
【０００８】本発明の舗装用アスファルトは、例えば、
骨材等に添加、混合し、また、必要により改質剤、剥離
防止剤、分散剤、安定化剤等の添加剤を配合することに
より舗装用アスファルト組成物にすることができる。前
記舗装用アスファルト組成物にする場合、本発明の舗装
用アスファルトの配合割合は、骨材に対して２〜１０重
量％の範囲が好ましい。舗装用アスファルト組成物の混
合は、本発明の舗装用アスファルト、骨材、必要により
改質剤等を配合し、ミキサーを用いて１５０〜１９０℃
の温度範囲で行なうことが好ましい。[0008] The asphalt for paving of the present invention is, for example,
An asphalt composition for pavement can be obtained by adding and mixing to an aggregate or the like and, if necessary, adding additives such as a modifier, an anti-stripping agent, a dispersant and a stabilizer. In the case of the asphalt composition for paving, the proportion of the asphalt for paving of the present invention is preferably in the range of 2 to 10% by weight based on the aggregate. The asphalt composition for pavement is mixed with the asphalt for pavement of the present invention, an aggregate, a modifier and the like as necessary, and mixed at 150 to 190 ° C. using a mixer.
It is preferable to carry out in a temperature range of
【０００９】前記改質剤としては、ゴム、熱可塑性エラ
ストマー、樹脂等が挙げられる。これらは単独、あるい
は混合して用いることができる。ゴムとしては、クロロ
プレンゴム、スチレン−ブタジエンゴム、天然ゴム等が
挙げられる。熱可塑性エラストマーとしては、スチレン
−ブタジエン−スチレンブロック共重合体、スチレン−
イソプレン−スチレンブロック共重合体、スチレン−エ
チレン−ブタジエン−スチレンブロック共重合体等が挙
げられる。樹脂としては、脂肪族系炭化水素樹脂、脂環
族系炭化水素樹脂等が挙げられる。[0009] Examples of the modifier include rubber, thermoplastic elastomer, resin and the like. These can be used alone or as a mixture. Examples of the rubber include chloroprene rubber, styrene-butadiene rubber, and natural rubber. As the thermoplastic elastomer, styrene-butadiene-styrene block copolymer, styrene-
Examples include an isoprene-styrene block copolymer and a styrene-ethylene-butadiene-styrene block copolymer. Examples of the resin include an aliphatic hydrocarbon resin and an alicyclic hydrocarbon resin.
【００１０】このような本発明の舗装用アスファルトを
含む舗装用アスファルト組成物により得られる舗装は、
再利用時に、再生添加剤、例えば、石油系潤滑油等を添
加することにより、１５℃伸度又は２５℃伸度をアスフ
ァルト舗装要網(社団法人日本道路協会)に記載されてい
る道路用アスファルトの規格値以上に、具体的には、ス
トレートアスファルト４０／６０へ再生する場合、１５
℃伸度が１０ｃｍ以上、ストレートアスファルト６０／
８０、ストレートアスファルト８０／１００、ストレー
トアスファルト１００／１２０へ再生する場合、１５℃
伸度が１００ｃｍ以上、また、ストレートアスファルト
２０／４０へ再生する場合、２５℃伸度が５０ｃｍ以上
に容易に回復させることができる。The pavement obtained by the asphalt composition for pavement containing the asphalt for pavement of the present invention is as follows:
At the time of reuse, by adding a regenerating additive, for example, a petroleum-based lubricating oil, the asphalt for roads described in the asphalt pavement network (Japan Road Association) has an elongation of 15 ° C or an elongation of 25 ° C. Above the specified value, specifically, when regenerating to straight asphalt 40/60,
℃ elongation 10cm or more, straight asphalt 60 /
80, straight asphalt 80/100, when regenerating to straight asphalt 100/120, 15 ℃
When the elongation is regenerated to a straight asphalt 20/40 with an elongation of 100 cm or more, the elongation at 25 ° C. can be easily recovered to 50 cm or more.
【００１１】また、本発明の舗装用アスファルトは、舗
装用アスファルト廃材の再生にも用いることができる。
すなわち、舗装廃材より得られる再生骨材(表面を劣化
したアスファルトが被覆した状態にある骨材)１０〜１
００重量％に、新骨材を９０〜０重量％混合し、さらに
再生後のアスファルト混合物中のアスファルト量が、好
ましくは４．９〜９．５重量％となるように、本発明の
舗装用アスファルトを所定量混合することにより、舗装
用アスファルト廃材の再生が可能となる。舗装用アスフ
ァルト廃材を再生する方法は、該廃材を破砕及び分級し
た再生骨材(ストック)に、本発明の舗装用アスファル
ト、必要により新骨材、改質剤、剥離防止剤、分散剤、
安定化剤等の添加剤を配合し、ミキサーを用いて１５０
〜１９０℃で混合することにより再生アスファルト組成
物を得ることができる。前記再生骨材とは、骨材に劣化
アスファルトが被覆した状態のものである。舗装用アス
ファルト廃材としては、各種工事の際に発生するアスフ
ァルト廃材、例えば地下鉄工事、地下配管工事等の際に
発生するアスファルト廃材等が挙げられる。改質剤とし
ては、前述の例示した改質剤等が挙げられる。The pavement asphalt of the present invention can also be used for reclaiming pavement asphalt waste.
That is, recycled aggregate obtained from waste pavement (aggregate covered with asphalt whose surface has deteriorated)
90% by weight of the new aggregate is mixed with 00% by weight, and the amount of asphalt in the asphalt mixture after regeneration is preferably 4.9 to 9.5% by weight. By mixing a predetermined amount of asphalt, it is possible to recycle asphalt waste material for pavement. The method of reclaiming asphalt waste for pavement is to recycle aggregate (stock) obtained by crushing and classifying the waste, the asphalt for pavement of the present invention, if necessary, new aggregate, modifier, anti-peeling agent, dispersant,
Add additives such as stabilizers and mix using a mixer.
By mixing at ~ 190 ° C, a reclaimed asphalt composition can be obtained. The recycled aggregate is a state in which the aggregate is covered with degraded asphalt. Examples of asphalt waste materials for pavement include asphalt waste materials generated during various works, for example, asphalt waste materials generated during subway work, underground piping work, and the like. Examples of the modifying agent include the modifying agents exemplified above.
【００１２】[0012]
【発明の効果】本発明の舗装用アスファルトは、平均分
子量２０００〜３０００の溶剤脱れきアスファルトを特
定量含み、かつ２５℃における針入度が２０〜１２０、
１５℃における複素弾性率（Ｇ*）と損失正接（ｔａｎ
δ）との関係が２．０６ｅ-0.04 2G*≦ｔａｎδを満足す
るので、再生及び繰り返し再生後のアスファルトを道路
舗装用アスファルトの規格値以上の伸度に回復させるこ
とができる。The asphalt for paving of the present invention contains a specific amount of deasphalted asphalt having an average molecular weight of 2,000 to 3,000, and has a penetration at 25 ° C. of 20 to 120,
Complex modulus (G * ) at 15 ° C. and loss tangent (tan)
δ) satisfies 2.06e− 0.042G * ≦ tan δ, so that the asphalt after regeneration and repeated regeneration can be restored to an elongation equal to or higher than the standard value of asphalt for road pavement.
【００１３】[0013]
【実施例】以下実施例及び比較例により、本発明を更に
詳細に説明するが、本発明はこれらに限定されるもので
はない。なお、例中の平均分子量、針入度、伸度、複素
弾性率（Ｇ*）及び損失正接（ｔａｎδ）の測定は前述
の測定方法に従って行なった。実施例１ 平均分子量２６００の溶剤脱れきアスファルト(プロパ
ン脱れきアスファルト)を５０重量部と、減圧蒸留によ
り得られた針入度８００の減圧蒸留残渣油を５０重量部
とを混合し、２５℃における針入度が６８、１５℃にお
ける複素弾性率（Ｇ*）が１０．３０ＭＰａ、１５℃に
おける損失正接（ｔａｎδ）が１．５０のアスファルト
試料を調製した。この試料を薄膜加熱試験(ＴＥＯＴ)で
５時間試験後、さらに米国のＳＨＲＰが提案する加圧劣
化試験(ＰＡＶ)で２５℃における針入度を２７まで劣化
させた。その後、再生添加剤(日本石油(株)製の市販再
生添加剤「リバースドープ３号」)にて針入度を７０ま
で回復させ再生試料(試料１とする)を得た。試料１の１
５℃伸度を測定した結果１００ｃｍ以上であった。The present invention will be described in more detail with reference to the following Examples and Comparative Examples, but the present invention is not limited thereto. The average molecular weight, penetration, elongation, complex elastic modulus (G * ), and loss tangent (tan δ) in the examples were measured according to the above-described measurement methods. Example 1 50 parts by weight of a solvent deasphalted asphalt having an average molecular weight of 2600 (propane deasphalted asphalt) and 50 parts by weight of a vacuum distillation residual oil having a penetration of 800 obtained by vacuum distillation were mixed at 25 ° C. An asphalt sample having a penetration of 68, a complex elastic modulus (G * ) at 15 ° C of 10.30 MPa, and a loss tangent (tan δ) at 15 ° C of 1.50 was prepared. This sample was tested for 5 hours by a thin film heating test (TEOT), and further, the penetration at 25 ° C. was degraded to 27 by a pressurization deterioration test (PAV) proposed by US SHRP. Thereafter, the penetration was restored to 70 with a regeneration additive (a commercially available regeneration additive "Reverse Dope No. 3" manufactured by Nippon Oil Co., Ltd.) to obtain a regeneration sample (sample 1). Sample 1 of 1
The elongation at 5 ° C. was measured and found to be 100 cm or more.
【００１４】実施例２ 実施例１で調製した試料１を、実施例１と同様の手法で
針入度２８まで劣化させた後、針入度６９へ再生し、再
々生試料(試料２とする)を調製した。試料２の１５℃伸
度を実施例１と同様に測定したところ１００ｃｍ以上で
あった。 Example 2 Sample 1 prepared in Example 1 was deteriorated to a penetration of 28 in the same manner as in Example 1, then regenerated to a penetration of 69, and regenerated again (sample 2). ) Was prepared. When the elongation at 15 ° C. of Sample 2 was measured in the same manner as in Example 1, it was 100 cm or more.
【００１５】比較例１ 溶剤脱れきアスファルトではない減圧蒸留により得られ
た減圧蒸留アスファルトを用意した。この減圧蒸留アス
ファルトは、２５℃における針入度が６７、１５℃にお
ける複素弾性率（Ｇ*）が６．４１ＮＰａ、１５℃にお
ける損失正接（ｔａｎδ）が１．３５であった。この減
圧蒸留アスファルトを薄膜加熱試験(ＴＦＯＴ)で５時間
試験後、更に米国のＳＨＲＰが提案する加圧劣化試験
(ＰＡＶ)で２５℃における針入度が２６になるまで劣化
させた。その後、再生添加剤（日本石油(株)製の市販再
生添加剤「リバースドープ３号」）にて針入度を７０ま
で回復させ再生試料(試料３とする)を調製した。この試
料３の１５℃伸度を実施例１と同様に測定したところ２
５ｃｍであった。 Comparative Example 1 A vacuum-distilled asphalt obtained by vacuum distillation which was not a solvent deasphalted asphalt was prepared. This vacuum distilled asphalt had a penetration at 25 ° C of 67, a complex elastic modulus (G * ) at 15 ° C of 6.41 NPa, and a loss tangent (tan δ) at 15 ° C of 1.35. This vacuum distilled asphalt is tested for 5 hours by the thin film heating test (TFOT), and then the pressure deterioration test proposed by the US SHRP
(PAV), until the penetration at 25 ° C. became 26. Thereafter, the penetration was restored to 70 with a regeneration additive (a commercially available regeneration additive “Reverse Dope No. 3” manufactured by Nippon Oil Co., Ltd.) to prepare a regeneration sample (sample 3). The elongation at 15 ° C. of this sample 3 was measured in the same manner as in Example 1.
5 cm.
【００１６】比較例２ 比較例１で調製した試料３を、比較例１と同様の手法で
針入度２８まで劣化させた後、比較例１と同様に針入度
６９へ再生し、再々生試料(試料４とする)を調製した。
試料４の１５℃伸度を実施例１と同様に測定したところ
１２ｃｍであった。 Comparative Example 2 Sample 3 prepared in Comparative Example 1 was deteriorated to a penetration of 28 in the same manner as in Comparative Example 1, and then regenerated to a penetration of 69 in the same manner as in Comparative Example 1, and regenerated again. A sample (sample 4) was prepared.
When the elongation at 15 ° C. of Sample 4 was measured in the same manner as in Example 1, it was 12 cm.
Claims (1)
量２０００〜３０００の溶剤脱れきアスファルトを２０
〜８０重量％含み、かつ２５℃における針入度が２０〜
１２０、１５℃における複素弾性率（Ｇ*）と損失正接
（ｔａｎδ）との関係が２．０６ｅ-0.042G*≦ｔａｎδ
を満足することを特徴とする舗装用アスファルト。The present invention relates to asphalt for pavement, in which asphalt having a mean molecular weight of 2,000 to 3,000 is removed.
８０80% by weight, and the penetration at 25 ° C. is 20-
The relationship between the complex elastic modulus (G * ) and the loss tangent (tan δ) at 120 and 15 ° C. is 2.06e− 0.042G * ≦ tan δ
Asphalt for paving, characterized by satisfying the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10364103A JP2000186211A (en) | 1998-12-22 | 1998-12-22 | Paving asphalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10364103A JP2000186211A (en) | 1998-12-22 | 1998-12-22 | Paving asphalt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000186211A true JP2000186211A (en) | 2000-07-04 |
| JP2000186211A5 JP2000186211A5 (en) | 2006-01-05 |
Family
ID=18480987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10364103A Pending JP2000186211A (en) | 1998-12-22 | 1998-12-22 | Paving asphalt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000186211A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005023173A (en) * | 2003-06-30 | 2005-01-27 | Nippon Oil Corp | Asphalt for pavement |
| JP2009501829A (en) * | 2005-07-20 | 2009-01-22 | エスケー エナジー 株式会社 | High quality asphalt containing petroleum pitch and method for producing the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06116499A (en) * | 1992-10-06 | 1994-04-26 | Nippon Oil Co Ltd | Production of paving asphalt |
| JPH09249810A (en) * | 1996-01-10 | 1997-09-22 | Idemitsu Kosan Co Ltd | Modified asphalt composition |
| JPH1060286A (en) * | 1996-08-26 | 1998-03-03 | Cosmo Sogo Kenkyusho:Kk | Modified asphalt composition for paving |
| JPH10273598A (en) * | 1997-01-28 | 1998-10-13 | Jsr Corp | Asphalt paving composition |
-
1998
- 1998-12-22 JP JP10364103A patent/JP2000186211A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06116499A (en) * | 1992-10-06 | 1994-04-26 | Nippon Oil Co Ltd | Production of paving asphalt |
| JPH09249810A (en) * | 1996-01-10 | 1997-09-22 | Idemitsu Kosan Co Ltd | Modified asphalt composition |
| JPH1060286A (en) * | 1996-08-26 | 1998-03-03 | Cosmo Sogo Kenkyusho:Kk | Modified asphalt composition for paving |
| JPH10273598A (en) * | 1997-01-28 | 1998-10-13 | Jsr Corp | Asphalt paving composition |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005023173A (en) * | 2003-06-30 | 2005-01-27 | Nippon Oil Corp | Asphalt for pavement |
| JP2009501829A (en) * | 2005-07-20 | 2009-01-22 | エスケー エナジー 株式会社 | High quality asphalt containing petroleum pitch and method for producing the same |
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