JP3537598B2 - Straight asphalt composition for paving - Google Patents
Straight asphalt composition for pavingInfo
- Publication number
- JP3537598B2 JP3537598B2 JP17726196A JP17726196A JP3537598B2 JP 3537598 B2 JP3537598 B2 JP 3537598B2 JP 17726196 A JP17726196 A JP 17726196A JP 17726196 A JP17726196 A JP 17726196A JP 3537598 B2 JP3537598 B2 JP 3537598B2
- Authority
- JP
- Japan
- Prior art keywords
- mass
- viscosity
- asphalt
- penetration
- straight asphalt
- 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.)
- Expired - Fee Related
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- Compositions Of Macromolecular Compounds (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、舗装用ストレート
アスファルト組成物に関し、詳しくは６０℃粘度が低い
舗装用ストレートアスファルトの、軟化点、針入度をほ
とんど変えずに、６０℃粘度のみを改善した舗装用スト
レートアスファルト組成物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straight asphalt composition for pavement, and more particularly, to a straight asphalt for pavement having a low viscosity at 60.degree. The present invention relates to a straight asphalt composition for paving.
【０００２】[0002]
【従来の技術】舗装用石油アスファルトは、原油を常圧
蒸留装置及び減圧蒸留装置等にかけ、軽質分を除去して
得られる瀝青物質であり、これをストレートアスファル
トと言う。舗装用ストレートアスファルトの種類は、ア
スファルト舗装要綱において針入度（ＪＩＳ Ｋ ２２
０７準拠）によりストレートアスファルト４０〜６０、
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の４種類に分類されている。その種類別の使い方
としては、一般地域では主として針入度６０〜８０（１
／１０ｍｍ）のストレートアスファルト６０〜８０を、
積雪寒冷地域では主としてストレートアスファルト８０
〜１００を用いる。また一般地域で交通量が多い場合に
はストレートアスファルト４０〜６０を、極端に低温に
なる地域にはストレートアスファルト１００〜１２０を
それぞれ用いることがある。原油の種類によっては、蒸
留だけでは全種の舗装用ストレートアスファルトを得る
ことができないものもあるので、空気を吹き込んだり、
針入度の異なるアスファルトを調合して所定の品質に調
製する場合もある。このように、舗装用ストレートアス
ファルトは針入度で分類され、アスファルト舗装要綱で
定められる品質規格を満足するものが製品として使用さ
れているのが現状である。舗装用アスファルトの品質評
価として、アスファルト舗装要綱規格項目の他に６０℃
粘度がある。６０℃粘度はアスファルト舗装の供用温度
上限付近におけるアスファルトのコンシステンシーを評
価するためのものである。アスファルトの６０℃粘度と
アスファルト混合物のマーシャル安定度、及びホイール
トラッキング試験における動的安定度は良好な相関関係
を示し、６０℃粘度が大きいほどマーシャル安定度、及
び動的安定度は大きくなる。６０℃粘度は主に、改質ア
スファルト、セミブローンアスファルトの評価に用いら
れるものであるが、舗装用ストレートアスファルトも６
０℃粘度が大きいものが求められている。2. Description of the Related Art Petroleum asphalt is a bituminous substance obtained by subjecting crude oil to an atmospheric distillation apparatus or a vacuum distillation apparatus to remove light components, and is referred to as straight asphalt. The type of straight asphalt for pavement is based on the penetration (JIS K22) in the asphalt pavement outline.
07), straight asphalt 40-60,
Straight asphalt 60-80, straight asphalt 80-100, straight asphalt 100-
120 are classified into four types. As a usage by type, in general areas, the penetration is mainly 60 to 80 (1
/ 10 mm) straight asphalt 60 to 80,
It is mainly straight asphalt 80 in cold snowy areas.
~ 100 is used. In addition, straight asphalts 40 to 60 may be used when traffic volume is high in general areas, and straight asphalts 100 to 120 may be used in areas where the temperature is extremely low. Depending on the type of crude oil, it is not possible to obtain all kinds of straight asphalt for pavement by distillation alone.
In some cases, asphalts having different penetrations are blended and adjusted to a predetermined quality. As described above, pavement straight asphalt is classified according to the penetration, and at present the one that satisfies the quality standard defined by the asphalt pavement outline is used as a product. Asphalt pavement quality evaluation, as well as asphalt pavement standard specification items, 60 ℃
There is viscosity. The 60 ° C. viscosity is for evaluating the asphalt consistency near the upper limit of the asphalt pavement service temperature. The asphalt viscosity at 60 ° C. and the marshal stability of the asphalt mixture and the dynamic stability in the wheel tracking test show a good correlation, and the greater the viscosity at 60 ° C., the greater the marshalling stability and the dynamic stability. The 60 ° C. viscosity is mainly used for evaluation of modified asphalt and semi-blown asphalt.
What has a large 0 degreeC viscosity is calculated | required.
【０００３】[0003]
【発明が解決しようとする課題】アスファルト舗装要綱
で定められる品質規格においては同等の性状を有する製
品でも、原油の種類により６０℃粘度が小さいものがあ
る。特に６０℃粘度についての規格はないが、６０℃粘
度はアスファルト舗装における流動性と関連が深いとさ
れ、高いものが好ましいと考えられている。６０℃粘度
の低いストレートアスファルトに、単に６０℃粘度の大
きい重質アスファルトを混合することにより粘度を増大
させた場合、６０℃粘度の増大に伴い、軟化点の増大及
び針入度の低下が大きくなり、アスファルト舗装要綱で
定められる針入度規格をはずれることがある。本発明
は、上記従来技術状況に鑑みてなされたものであり、具
体的にはアスファルト舗装要綱の品質規格を満足しなが
らも６０℃粘度が小さいストレートアスファルトの針入
度、軟化点をほとんど変化させずに、６０℃粘度のみを
増大させた舗装用ストレートアスファルト組成物を提供
することを目的とする。According to the quality standards specified in the asphalt pavement outline, even products having the same properties have a low viscosity at 60 ° C. depending on the type of crude oil. Although there is no standard for the viscosity at 60 ° C., the viscosity at 60 ° C. is considered to be closely related to the fluidity of asphalt pavement, and it is considered that a higher viscosity is preferable. When the viscosity is increased by simply mixing heavy asphalt having a large viscosity of 60 ° C. with straight asphalt having a low viscosity of 60 ° C., the increase in the softening point and the decrease in penetration greatly increase with the increase in the viscosity of 60 ° C. In other words, the penetration standard specified in the asphalt pavement outline may be deviated. The present invention has been made in view of the above-mentioned prior art situation, specifically, while satisfying the quality standards of asphalt pavement outlines, the penetration degree of straight asphalt having a small viscosity at 60 ° C., and almost changing the softening point. An object of the present invention is to provide a straight asphalt composition for pavement in which only the viscosity at 60 ° C. is increased.
【０００４】[0004]
【課題を解決するための手段】本発明者らは、上記課題
を解決するためにアスファルトの６０℃粘度に影響を及
ぼす因子について鋭意検討を重ねた結果、アスファルト
の６０℃粘度は、分子量、さらに分子量と組成に大きく
影響されることをつき止め、特定の平均分子量を有する
アスファルト類を６０℃粘度が小さいストレートアスフ
ァルトに特定割合で配合することにより、針入度、軟化
点を変化させずに６０℃粘度を効果的に増大させること
ができるとの知見を得て、本発明を完成するに至った。
すなわち、本発明は、６０℃粘度６０〜２００Ｐａ・ｓ
の性状を有するストレートアスファルトに、平均分子量
１０００〜２０００のアスファルト類が５〜６０質量％
配合されていることを特徴とする舗装用ストレートアス
ファルト組成物であり、詳しくは、軟化点４０〜５５
℃、針入度（２５℃）４０〜１２０（１／１０ｍｍ）、
６０℃粘度６０〜２００Ｐａ・ｓの性状を有し、飽和分
５〜２５質量％、アスファルテン分５〜２０質量％、芳
香族分３５〜６０質量％の組成から成るストレートアス
ファルトに、飽和分５〜２５質量％、アスファルテン分
５〜２０質量％、芳香族分３５〜６０質量％の組成から
成り、平均分子量が１０００〜２０００のアスファルト
類が５〜６０質量％配合されていることを特徴とする舗
装用ストレートアスファルト組成物を提供するものであ
る。以下、本発明を詳細に説明する。Means for Solving the Problems The present inventors have conducted intensive studies on factors affecting the viscosity of asphalt at 60 ° C. in order to solve the above-mentioned problems. As a result, the viscosity of asphalt at 60 ° C. By preventing asphalts having a specific average molecular weight from being greatly affected by the molecular weight and composition, and blending the asphalt having a specific average molecular weight into a straight asphalt having a small viscosity at 60 ° C. in a specific ratio, the penetration degree and the softening point are not changed. The inventors have found that the viscosity at ° C. can be effectively increased, and have completed the present invention.
That is, the present invention provides a 60 ° C. viscosity of 60 to 200 Pa · s.
Asphalts having an average molecular weight of 1,000 to 2,000 are contained in straight asphalt having properties of 5 to 60% by mass.
It is a straight asphalt composition for pavement characterized by being blended, and specifically has a softening point of 40 to 55.
° C, penetration (25 ° C) 40-120 (1 / 10mm),
It has properties of 60 ° C. viscosity of 60 to 200 Pa · s, straight asphalt having a composition of 5 to 25% by mass of a saturated component, 5 to 20% by mass of an asphaltene, and 35 to 60% by mass of an aromatic component. A pavement comprising a composition having a composition of 25% by mass, an asphaltene content of 5 to 20% by mass, and an aromatic content of 35 to 60% by mass, and containing 5 to 60% by mass of asphalts having an average molecular weight of 1,000 to 2,000. The present invention provides a straight asphalt composition for use. Hereinafter, the present invention will be described in detail.
【０００５】[0005]
【発明の実施の態様】ストレートアスファルトは、各種
原油を常圧蒸留装置及び減圧蒸留装置にかけ、軽質分を
除去して得られる瀝青物質であるが、本発明で使用する
ストレートアスファルトは、６０℃粘度６０〜２００Ｐ
ａ・ｓの性状を有するストレートアスファルトである。
６０℃粘度が６０Ｐａ・ｓ未満の低粘度のものは、流動
性が大きく、舗装用ストレートアスファルトとして好ま
しくない。また、本発明で使用するストレートアスファ
ルトは、軟化点４０〜５５℃、針入度（２５℃）４０〜
１２０（１／１０ｍｍ）、６０℃粘度６０〜２００Ｐａ
・ｓの性状を有し、飽和分５〜２５質量％、アスファル
テン分５〜２０質量％、芳香族分３５〜６０質量％の組
成から成るものが好ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS Straight asphalt is a bituminous substance obtained by subjecting various crude oils to an atmospheric distillation apparatus and a vacuum distillation apparatus to remove light components. The straight asphalt used in the present invention has a viscosity of 60 ° C. 60-200P
It is a straight asphalt having properties of a · s.
Those having a low viscosity of less than 60 Pa · s at 60 ° C. have high fluidity and are not preferable as straight asphalt for paving. The straight asphalt used in the present invention has a softening point of 40 to 55 ° C and a penetration (25 ° C) of 40 to 55 ° C.
120 (1/10 mm), 60 ° C viscosity 60-200 Pa
It is preferable to have a property of s and to have a composition of 5 to 25% by mass of a saturated component, 5 to 20% by mass of an asphaltene, and 35 to 60% by mass of an aromatic component.
【０００６】軟化点、針入度はアスファルト舗装要綱の
品質規格で定められた値であり、軟化点が４０℃未満、
針入度が１２０（１／１０ｍｍ）を超えるものは、舗装
用ストレートアスファルトとしては柔らか過ぎ、高温で
の性能や舗装施工における骨材との接着力等の点で好ま
しくない。また、軟化点が５５℃を超えるもの、針入度
が４０（１／１０ｍｍ）未満のものは、低温での性能や
耐ひび割れ性等の点で好ましくない。飽和分が５質量％
未満だと針入度が小さく、２５質量％を超えると、針入
度が大きくなる。アスファルテン分が５質量％未満だと
針入度が大きく、２０質量％を超えると、針入度が小さ
くなり、芳香族分が３５質量％未満だと針入度が小さ
く、６０質量％を超えると、針入度が大きくなり、それ
ぞれアスファルト舗装要綱で定められる針入度規格をは
ずれる可能性があり好ましくない。ストレートアスファ
ルトの組成において、飽和分の特に好ましい範囲は９〜
２１質量％であり、アスファルテン分の特に好ましい範
囲は９〜１６質量％であり、芳香族分の特に好ましい範
囲は４０〜５５質量％である。６０℃粘度６０〜２００
Ｐａ・ｓの性状を有するストレートアスファルトの平均
分子量は、３００以上かつ１０００未満であることが好
ましく、特に４００以上かつ１０００未満であることが
好ましい。[0006] The softening point and the penetration are values determined by the quality standard of the asphalt pavement outline, and the softening point is less than 40 ° C.
Those having a penetration of more than 120 (1/10 mm) are too soft as straight asphalt for pavement, and are not preferred in terms of performance at high temperatures and adhesion to aggregate in pavement construction. Further, those having a softening point exceeding 55 ° C. and having a penetration of less than 40 (1/10 mm) are not preferred in terms of low-temperature performance and crack resistance. 5% by mass of saturated component
If it is less than 25%, the penetration is small, and if it exceeds 25% by mass, the penetration becomes large. When the asphaltene content is less than 5% by mass, the penetration is large, and when it exceeds 20% by mass, the penetration becomes small, and when the aromatic component is less than 35% by mass, the penetration is small and exceeds 60% by mass. In addition, the penetration becomes large, which may deviate from the penetration standard specified in the asphalt pavement outline, which is not preferable. In the composition of straight asphalt, a particularly preferable range of the saturated content is 9 to
21% by mass, a particularly preferable range of the asphaltene content is 9 to 16% by mass, and a particularly preferable range of the aromatic content is 40 to 55% by mass. 60 ° C viscosity 60-200
The average molecular weight of the straight asphalt having the property of Pa · s is preferably 300 or more and less than 1,000, and particularly preferably 400 or more and less than 1,000.
【０００７】アスファルト類は、一般的には各種原油を
常圧蒸留装置及び減圧蒸留装置にかけ、軽質分を除去し
て得られる瀝青物質であるストレートアスファルト、ス
トレートアスファルトを常圧下で２３０〜２７０℃の温
度で空気を吹き込み、構成している炭化水素に脱水素重
合、縮合反応を起こさせてコンシステンシーの高い状態
にしたセミブローンアスファルトやブローンアスファル
ト、ストレートアスファルトにポリマー等の改質材を１
種もしくは２種以上混合することにより得られる改質ア
スファルト、その他石油樹脂の様なものが挙げられる
が、本発明で使用するアスファルト類は、これらのうち
平均分子量が１０００〜２０００のものであり、好まし
くは１１００〜１９００のものである。なお、ここでの
平均分子量は蒸気圧平衡法により測定したものである。
また、ゲル浸透クロマトグラフ法（ＧＰＣ）による数平
均分子量を使用しても良い。配合するアスファルト類の
平均分子量が１０００未満の場合、粘度増大効果が小さ
く、本発明における効果が少ない。また、平均分子量が
大きいものほど粘度増大効果は大きいが、平均分子量が
２０００を超えるものは入手が困難であり、実用面、コ
スト面で問題が生じる。[0007] Asphalts are generally prepared by subjecting various crude oils to a normal pressure distillation apparatus and a low pressure distillation apparatus to remove light components, and to obtain straight asphalt, which is a bituminous substance obtained at 230-270 ° C under normal pressure. Air is blown in at a temperature to cause dehydrogenation polymerization and condensation reaction of the constituent hydrocarbons to produce a high-consistency semi-blown asphalt, blown asphalt and straight asphalt with a modifier such as a polymer.
Asphalts used in the present invention include modified asphalts obtained by mixing seeds or two or more kinds, and other types of petroleum resins. Among these, the average molecular weight is 1,000 to 2,000, Preferably it is 1100-1900. Here, the average molecular weight is measured by a vapor pressure equilibrium method.
Alternatively, a number average molecular weight determined by gel permeation chromatography (GPC) may be used. When the average molecular weight of the asphalts to be blended is less than 1,000, the effect of increasing the viscosity is small and the effect in the present invention is small. The higher the average molecular weight, the greater the effect of increasing the viscosity. However, those having an average molecular weight of more than 2,000 are difficult to obtain, causing problems in practical use and cost.
【０００８】配合するアスファルト類は、軟化点４０〜
５５℃、針入度（２５℃）４０〜１２０（１／１０ｍ
ｍ）のものが好ましく、６０℃粘度６０〜２００Ｐａ・
ｓの性状を有するストレートアスファルトと同程度の軟
化点、針入度（２５℃）であることが好ましい。配合す
るアスファルト類の軟化点、針入度が６０℃粘度６０〜
２００Ｐａ・ｓの性状を有するストレートアスファルト
と大きく異なる場合は、軟化点、針入度が大きく変化
し、アスファルト舗装要綱の品質規格をはずれる可能性
があり好ましくない。配合するアスファルト類と６０℃
粘度６０〜２００Ｐａ・ｓの性状を有するストレートア
スファルトの軟化点、針入度の差は、それぞれ±５℃以
内、±５（１／１０ｍｍ）以内であることが好ましく、
特に±３℃以内、±３（１／１０ｍｍ）以内であること
が好ましい。The asphalt to be blended has a softening point of 40 to
55 ° C, penetration (25 ° C) 40-120 (1 / 10m
m) are preferable, and the viscosity at 60 ° C is 60 to 200 Pa ·
It is preferable that the softening point and the penetration (25 ° C.) are the same as those of the straight asphalt having the properties of s. Softening point and penetration of asphalt to be blended are 60 ° C viscosity 60 ~
When it is significantly different from the straight asphalt having the property of 200 Pa · s, the softening point and the penetration are greatly changed, and the quality standard of the asphalt pavement outline may be deviated, which is not preferable. Asphalt to be blended and 60 ℃
The difference in softening point and penetration of straight asphalt having a viscosity of 60 to 200 Pa · s is preferably within ± 5 ° C. and ± 5 (1/10 mm), respectively.
In particular, the temperature is preferably within ± 3 ° C. and ± 3 (1/10 mm).
【０００９】配合するアスファルト類の組成は、飽和分
が好ましくは５〜２５質量％、特に好ましくは９〜２１
質量％であり、アスファルテン分が好ましくは５〜２０
質量％、特に好ましくは９〜１６質量％であり、芳香族
分が好ましくは３５〜６０質量％、特に好ましくは４０
〜５５質量％であり、６０℃粘度６０〜２００Ｐａ・ｓ
の性状を有するストレートアスファルトと同程度の組成
であることが好ましい。このストレートアスファルトと
組成が異なると、軟化点、針入度が大きく変化し、アス
ファルト舗装要綱の品質規格をはずれる可能性があり好
ましくない。配合するアスファルト類と６０℃粘度６０
〜２００Ｐａ・ｓの性状を有するストレートアスファル
トの飽和分、アスファルテン分、芳香族分の差は、それ
ぞれ ±４質量％以内、±４質量％以内、±６質量％以
内であることが好ましく、特に±２質量％以内、±２質
量％以内、±４質量％以内であることが好ましい。な
お、ここでの組成は、石油学会法（ＪＰＩ法）による組
成分析結果を意味する。[0009] The composition of the asphalts to be blended preferably has a saturated content of 5 to 25% by mass, particularly preferably 9 to 21% by mass.
% By weight, and the asphaltene content is preferably 5 to 20%.
% By mass, particularly preferably 9 to 16% by mass, and the aromatic content is preferably 35 to 60% by mass, particularly preferably 40 to 60% by mass.
And a viscosity of 60 to 200 Pa · s at 60 ° C.
It is preferable that the composition is the same as that of straight asphalt having the following properties. If the composition is different from that of the straight asphalt, the softening point and the penetration greatly change, and the quality standard of the asphalt pavement outline may be deviated, which is not preferable. Asphalt to be blended and viscosity at 60 ° C 60
The difference between the saturated content, asphaltene content, and aromatic content of straight asphalt having a property of ~ 200 Pa · s is preferably within ± 4% by mass, ± 4% by mass, and ± 6% by mass, particularly ± It is preferably within 2% by mass, within ± 2% by mass, and within ± 4% by mass. Here, the composition means the result of composition analysis by the Japan Petroleum Institute method (JPI method).
【００１０】アスファルトの６０℃粘度は、アスファル
テン分が多く、飽和分、芳香族分等の軽質分が少ないほ
ど増大する。従って、アスファルトの粘度を増大させる
ためには、アスファルテン分が多く、飽和分、芳香族分
が少ない油種を配合するのが有効である。しかし、組成
割合の変化により粘度を増大させようとすると、粘度増
大に伴い、軟化点が高くなり、針入度が小さくなる傾向
がある。配合するアスファルト類のアスファルテン分が
２０質量％を超える場合、飽和分、芳香族分がそれぞれ
５質量％、３５質量％未満の場合は、軟化点の上昇及び
針入度の低下が大きくなる傾向があり、低温での性能、
耐ひび割れ性等の点で好ましくない。また逆に、配合す
るアスファルト類のアスファルテン分が５質量％未満、
飽和分、芳香族分がそれぞれ２５質量％、６０質量％を
超える場合、粘度増大効果が小さく、さらに軟化点の低
下、及び針入度が大きくなる傾向があり、高温での性
能、骨材との接着力の点で好ましくない。The viscosity of asphalt at 60 ° C. increases as the asphaltene content increases and the light components such as saturated components and aromatic components decrease. Therefore, in order to increase the viscosity of asphalt, it is effective to mix an oil type having a large asphaltene content and a small saturated content and an aromatic content. However, when an attempt is made to increase the viscosity by changing the composition ratio, the softening point tends to increase and the penetration tends to decrease as the viscosity increases. When the asphaltene content of the asphalts to be blended exceeds 20% by mass, and when the saturated component and the aromatic component are less than 5% by mass and 35% by mass, respectively, the increase in the softening point and the decrease in the penetration tend to increase. Yes, low temperature performance,
It is not preferable in terms of crack resistance and the like. On the contrary, the asphaltene content of the asphalt to be blended is less than 5% by mass,
When the saturated content and the aromatic content are more than 25% by mass and 60% by mass, respectively, the effect of increasing the viscosity is small, the softening point tends to decrease, and the penetration tends to increase. Is not preferred in terms of adhesive strength.
【００１１】故に、軟化点、針入度変化を極力小さくす
るために、本発明において配合するアスファルト類は、
６０℃粘度６０〜２００Ｐａ・ｓの性状を有するストレ
ートアスファルトと同程度の組成を有することが好まし
い。しかし、粘度増大の対象とする６０℃粘度６０〜２
００Ｐａ・ｓの性状を有するストレートアスファルトと
異なる組成の油種でも、結果的に軟化点、及び針入度の
変化が小さくなるアスファルト類は使用可能である。例
えば、配合することによりアスファルテン分が多くなる
場合、それに伴い軽質分も多くなる油種、または逆にア
スファルテン分が少なくなる場合、それに伴い軽質分も
少なくなる様な油種は使用可能である。Therefore, in order to minimize the change in softening point and penetration, asphalts to be blended in the present invention are:
It is preferable that the composition has the same composition as straight asphalt having a viscosity of 60 to 200 Pa · s at 60 ° C. However, the viscosity at 60 ° C. of 60 to 2 to be increased
Asphalts that have a softening point and a small change in penetration as a result can be used even with an oil type having a composition different from that of straight asphalt having a property of 00 Pa · s. For example, when the asphaltene content is increased by blending, an oil type in which the light content increases accordingly, or when the asphaltene content decreases, an oil type in which the light content decreases accordingly can be used.
【００１２】配合するアスファルト類の量は、６０℃粘
度６０〜２００Ｐａ・ｓの性状を有するストレートアス
ファルトとアスファルト類の合計量に対して、５〜６０
質量％、好ましくは１０〜５０質量％である。配合量が
５質量％未満の場合、粘度増大効果が小さい。また配合
量が多い方が粘度増大効果は大きくなるが、本発明は粘
度の小さいストレートアスファルトの有効利用を目的と
しているため、配合量が６０質量％を超える場合、粘度
増大の対象とするストレートアスファルトの使用量が少
なくなり、好ましくない。本発明は軟化点、針入度をほ
とんど変化させずに、粘度を増大させることが特徴であ
る。軟化点の変化は±５℃以内であることが好ましく、
特に、±３℃以内であることが好ましい。また、針入度
の変化は±４（１／１０ｍｍ）以内であることが好まし
く、特に、±２（１／１０ｍｍ）以内であることが好ま
しい。The amount of the asphalt to be blended is 5 to 60 with respect to the total amount of the straight asphalt and the asphalt having the property of a viscosity of 60 to 200 Pa · s at 60 ° C.
% By mass, preferably 10 to 50% by mass. When the amount is less than 5% by mass, the effect of increasing the viscosity is small. The higher the blending amount, the greater the viscosity increasing effect. However, since the present invention aims at the effective use of low viscosity straight asphalt, when the blending amount exceeds 60% by mass, the straight asphalt to be increased in viscosity is used. Is not preferred because the amount of used is small. The present invention is characterized in that the viscosity is increased without substantially changing the softening point and the penetration. The change in softening point is preferably within ± 5 ° C,
In particular, the temperature is preferably within ± 3 ° C. The change in the penetration is preferably within ± 4 (1/10 mm), and particularly preferably within ± 2 (1/10 mm).
【００１３】本発明の舗装用ストレートアスファルト組
成物においては、前記ストレートアスファルトに、前記
アスファルト類が配合されている組成物に、さらに軽質
アスファルト類を配合することができる。軽質アスファ
ルト類は、前記ストレートアスファルト、常圧残査油、
減圧残査油等が挙げられ、その他に石油樹脂、減圧蒸留
留出油等も挙げられる。軽質アスファルト類の好ましい
物性としては、比重が０．９０〜１．０３ｇ／ｃｍ3で
あり、好ましくは０．９５〜１．００ｇ／ｃｍ3であ
り、軟化点が１０〜４０℃であり、好ましくは２０〜３
０℃であり、針入度が１４０（１／１０ｍｍ）以上で、
好ましくは１６０（１／１０ｍｍ）以上のものである。
軽質アスファルト類は、１種単独または２種以上の混合
物を使用してもよい。配合する軽質アスファルト類の量
は、前記ストレートアスファルト、平均分子量１０００
〜２０００のアスファルト類及び軽質アスファルト類の
合計量の０．１〜５質量％、好ましくは０．１〜２質量
％である。軽質アスファルト類の配合量が５質量％を超
えると、針入度の増大に伴う粘度の低下が大きくなり、
本発明の効果が損なわれ好ましくない。[0013] In the straight asphalt composition for paving of the present invention, light asphalts can be further added to the composition in which the asphalts are added to the straight asphalt. Light asphalts are straight asphalt, normal pressure residual oil,
Examples thereof include a vacuum residue oil and the like, and also include a petroleum resin, a vacuum distillation distillate and the like. Preferred physical properties of the light asphalts include a specific gravity of 0.90 to 1.03 g / cm 3 , preferably 0.95 to 1.00 g / cm 3 , and a softening point of 10 to 40 ° C. Is 20-3
0 ° C, penetration is 140 (1 / 10mm) or more,
Preferably, it is 160 (1/10 mm) or more.
Light asphalts may be used alone or as a mixture of two or more. The amount of light asphalts to be blended is the straight asphalt, the average molecular weight of 1,000.
It is 0.1 to 5% by mass, preferably 0.1 to 2% by mass of the total amount of asphalts and light asphalts of up to 2000. When the blending amount of the light asphalts exceeds 5% by mass, the decrease in the viscosity with the increase in the penetration increases,
The effect of the present invention is impaired, which is not preferable.
【００１４】配合する軽質アスファルト類の組成は、飽
和分が２０〜５０質量％、好ましくは２５〜４０質量％
であり、アスファルテン分が０．１〜５質量％、好まし
くは１〜３質量％である。飽和分の量が２０質量％未満
の油種は、針入度をほとんど変化させないためには量を
多く配合しなければならない。軽質アスファルト類の配
合量が５質量％以上の場合は、粘度の低下が大きくな
り、本発明の効果が損なわれるため好ましくない。また
飽和分の量が５０質量％を超える場合、軽質アスファル
ト類の配合量が５質量％未満でも上記と同様の問題が生
じる。The composition of the light asphalt to be blended has a saturated content of 20 to 50% by mass, preferably 25 to 40% by mass.
And the asphaltene content is 0.1 to 5% by mass, preferably 1 to 3% by mass. Oils having a saturated content of less than 20% by mass must be blended in a large amount in order to hardly change the penetration. When the blending amount of the light asphalts is 5% by mass or more, the decrease in the viscosity becomes large and the effect of the present invention is impaired, which is not preferable. Further, when the amount of the saturated component exceeds 50% by mass, the same problem as described above occurs even when the blending amount of the light asphalts is less than 5% by mass.
【００１５】また、アスファルテン分が５質量％を超え
る場合、針入度を維持する効果が少なく、全く存在しな
くなると、アスファルトが柔らかくなり過ぎ、粘度の低
下が大きくなるという問題が生じる。配合する軽質アス
ファルト類の平均分子量は、９００〜２０００、好まし
くは１０００〜１９００である。分子量が９００未満の
場合、粘度の低下が大きく、本発明における粘度増大効
果が得られない。配合する軽質アスファルト類の分子量
が大きい方が、針入度の増加に伴う粘度の低下を極力小
さくする効果があることから、平均分子量は大きいほど
本発明においては有効であるが、平均分子量が２０００
を超える軽質アスファルト類は、入手が困難であり、実
用面、コスト面で問題が生じる。なお、ここでの平均分
子量は、蒸気圧平衡法により測定したものである。ま
た、ゲル浸透クロマトグラフ法（ＧＰＣ）による数平均
分子量を使用しても良い。Further, when the asphaltene content exceeds 5% by mass, the effect of maintaining the penetration is small, and when the asphaltene content is completely absent, the asphalt becomes too soft and the viscosity is greatly reduced. The average molecular weight of light asphalts to be blended is 900 to 2,000, preferably 1,000 to 1,900. When the molecular weight is less than 900, the viscosity is greatly reduced, and the effect of increasing the viscosity in the present invention cannot be obtained. The higher the molecular weight of the light asphalt to be compounded, the more effective it is in the present invention as the average molecular weight is higher, since the lower the viscosity, the more effective it is to reduce the decrease in viscosity with the increase in penetration.
Light asphalts exceeding the above are difficult to obtain, causing problems in practicality and cost. Here, the average molecular weight is measured by a vapor pressure equilibrium method. Alternatively, a number average molecular weight determined by gel permeation chromatography (GPC) may be used.
【００１６】本発明の舗装用ストレートアスファルト組
成物は、必要により、通常舗装用アスファルトに添加さ
れる他の添加材、例えば剥離防止剤、分散剤、安定剤な
どを添加してもよい。本発明の舗装用ストレートアスフ
ァルト組成物は、上記各成分を所定割合で配合すること
により製造することができる。各成分の混合は、プロペ
ラ式撹拌機、ホモミキサーなど各種の撹拌機が使用でき
るが、高剪断力をかけるホモミキサーが好ましい。各成
分の混合温度は、特に制限されるものではないが、通常
１２０〜１８０℃で行うことができる。If necessary, the straight asphalt composition for paving of the present invention may contain other additives, such as an anti-stripping agent, a dispersant, and a stabilizer, which are usually added to asphalt for paving. The pavement straight asphalt composition of the present invention can be produced by mixing the above components at a predetermined ratio. Various kinds of stirrers such as a propeller stirrer and a homomixer can be used for mixing the components, but a homomixer applying a high shear force is preferable. Although the mixing temperature of each component is not particularly limited, the mixing can be usually performed at 120 to 180 ° C.
【００１７】本発明の舗装用ストレートアスファルト組
成物の施工方法は、舗装用ストレートアスファルト組成
物を所定の温度で骨材、フィラーなどと混合し、舗装場
所に敷設し、転圧することにより行うことができる。骨
材、フィラーなどとの混合温度は、通常の混合温度でよ
く、例えば１６５〜１８５℃でよい。また、転圧時の温
度は通常の転圧温度でよく、例えば１５０〜１７５℃で
よい。また、本発明の舗装用ストレートアスファルト組
成物と骨材、フィラーなどとの混合に際しては、顔料を
混合することもできる。顔料は、通常の無機顔料（例え
ば、酸化鉄などの赤褐色顔料、水酸化鉄などの黄色顔
料、酸化クロムなどの緑顔料、ナトリウム−アルミノシ
リケートなどの群青色顔料、酸化チタンなどの白色顔料
など）が使用できる。The method for applying the straight asphalt composition for paving of the present invention can be carried out by mixing the straight asphalt composition for paving with an aggregate, a filler or the like at a predetermined temperature, laying it on a pavement site, and compacting it. it can. The mixing temperature with the aggregate, the filler and the like may be a normal mixing temperature, for example, 165 to 185 ° C. The temperature during rolling may be a normal rolling temperature, for example, 150 to 175 ° C. When the straight asphalt composition for pavement of the present invention is mixed with an aggregate, a filler, and the like, a pigment may be mixed. Pigments include ordinary inorganic pigments (for example, red-brown pigments such as iron oxide, yellow pigments such as iron hydroxide, green pigments such as chromium oxide, ultramarine pigments such as sodium-aluminosilicate, and white pigments such as titanium oxide). Can be used.
【００１８】[0018]
【実施例】次に、本発明を実施例、及び比較例によりさ
らに具体的に説明する。なお、本発明は、これらの例に
よって何ら制限されるものではない。実施例、比較例に
おける軟化点、針入度はＪＩＳ Ｋ２２０７に、６０℃
粘度は舗装試験法便覧（（社）日本道路協会、昭和６３
年版）に、組成分析は石油学会法（ＪＰＩ法）に準拠し
て行い、平均分子量は蒸気圧平衡法により測定した。Next, the present invention will be described more specifically with reference to examples and comparative examples. The present invention is not limited by these examples. The softening point and penetration in Examples and Comparative Examples were measured at 60 ° C. according to JIS K2207.
Viscosity is a pavement test manual (Japan Road Association, Showa 63)
Composition analysis was carried out in accordance with the Japan Petroleum Institute method (JPI method), and the average molecular weight was measured by a vapor pressure equilibrium method.
【００１９】実施例１
軟化点４８．５℃、針入度（２５℃）６２（１／１０ｍ
ｍ）、６０℃粘度１７０Ｐａ・ｓの性状を有し、飽和分
１４質量％、アスファルテン分１２質量％、芳香族分４
４質量％の組成からなり、平均分子量９００のストレー
トアスファルト６０〜８０に、飽和分１５質量％、アス
ファルテン分１２質量％、芳香族分４５質量％の組成か
ら成り、平均分子量１２００のアスファルトを全体量の
４０質量％の割合で１４０℃で混合した結果を表１に示
す。Example 1 Softening point 48.5 ° C., penetration (25 ° C.) 62 (1/10 m
m), having a viscosity of 60 Pa · s at 60 ° C., a saturated content of 14% by mass, an asphaltene content of 12% by mass, and an aromatic content of 4%.
A straight asphalt 60 to 80 having an average molecular weight of 900 and a composition of 15% by weight of a saturated component, 12% by weight of an asphaltene, and 45% by weight of an aromatic component. Table 1 shows the results of mixing at 140 ° C at a ratio of 40% by mass of the above.
【００２０】実施例２
軟化点４８．５℃、針入度（２５℃）６２（１／１０ｍ
ｍ）、６０℃粘度１７０Ｐａ・ｓの性状を有し、飽和分
１４質量％、アスファルテン分１２質量％、芳香族分４
４質量％の組成からなり、平均分子量９００のストレー
トアスファルト６０〜８０に、飽和分１５質量％、アス
ファルテン分１２質量％、芳香族分４５質量％の組成か
ら成り、平均分子量１２００のアスファルトを全体量の
５０質量％の割合で１４０℃で混合した結果を表１に示
す。Example 2 Softening point 48.5 ° C., penetration (25 ° C.) 62 (1/10 m
m), having a viscosity of 60 Pa · s at 60 ° C., a saturated content of 14% by mass, an asphaltene content of 12% by mass, and an aromatic content of 4%.
A straight asphalt 60 to 80 having an average molecular weight of 900 and a composition of 15% by weight of a saturated component, 12% by weight of an asphaltene, and 45% by weight of an aromatic component. Table 1 shows the results of mixing at 140 ° C at a ratio of 50% by mass of the above.
【００２１】実施例３
軟化点４８．５℃、針入度（２５℃）６２（１／１０ｍ
ｍ）、６０℃粘度１７０Ｐａ・ｓの性状を有し、飽和分
１４質量％、アスファルテン分１２質量％、芳香族分４
４質量％の組成からなり、平均分子量９００のストレー
トアスファルト６０〜８０に、飽和分１２質量％、アス
ファルテン分１１質量％、芳香族分４８質量％の組成か
ら成り、平均分子量１１５０のアスファルトを全体量の
４０質量％の割合で１４０℃で混合して調製したストレ
ートアスファルト組成物に、飽和分２８質量％、アスフ
ァルテン分１質量％の組成から成り、平均分子量１１０
０の軽質アスファルトを全体量の１質量％の割合で１４
０℃で混合した結果を表１に示す。Example 3 Softening point: 48.5 ° C., penetration (25 ° C.) 62 (1/10 m
m), having a viscosity of 60 Pa · s at 60 ° C., a saturated content of 14% by mass, an asphaltene content of 12% by mass, and an aromatic content of 4%.
A straight asphalt having an average molecular weight of 900, a straight asphalt having an average molecular weight of 900, a saturated asphaltene having an average molecular weight of 1150, an asphaltene content of 11% by weight, and an aromatic content of 48% by weight. A straight asphalt composition prepared by mixing at a temperature of 140 ° C. at a ratio of 40% by mass of the following components: a composition having a saturated content of 28% by mass and an asphaltene content of 1% by mass, and having an average molecular weight of 110
0 light asphalt at a rate of 1% by mass of the total amount of 14
Table 1 shows the results of mixing at 0 ° C.
【００２２】実施例４
軟化点４８．５℃、針入度（２５℃）６２（１／１０ｍ
ｍ）、６０℃粘度１７０Ｐａ・ｓの性状を有し、飽和分
１４質量％、アスファルテン分１２質量％、芳香族分４
４質量％の組成からなり、平均分子量９００のストレー
トアスファルト６０〜８０に、飽和分１２質量％、アス
ファルテン分１１質量％、芳香族分４８質量％の組成か
ら成り、平均分子量１１５０のアスファルトを全体量の
５０質量％の割合で１４０℃で混合して調製したストレ
ートアスファルト組成物に、飽和分２８質量％、アスフ
ァルテン分１質量％の組成からなり、平均分子量１１０
０の軽質アスファルトを全体量の１質量％の割合で１４
０℃で混合した結果を表１に示す。Example 4 Softening point 48.5 ° C., penetration (25 ° C.) 62 (1/10 m
m), having a viscosity of 60 Pa · s at 60 ° C., a saturated content of 14% by mass, an asphaltene content of 12% by mass, and an aromatic content of 4%.
A straight asphalt having an average molecular weight of 900, a straight asphalt having an average molecular weight of 900, a saturated asphaltene having an average molecular weight of 1150, an asphaltene content of 11% by weight, and an aromatic content of 48% by weight. A straight asphalt composition prepared by mixing at a rate of 50% by mass at 140 ° C. has a composition of 28% by mass of saturated component and 1% by mass of asphaltene component, and has an average molecular weight of 110.
0 light asphalt at a rate of 1% by mass of the total amount of 14
Table 1 shows the results of mixing at 0 ° C.
【００２３】[0023]
【表１】 [Table 1]
【００２４】実施例５
軟化点４５．５℃、針入度（２５℃）８３（１／１０ｍ
ｍ）、６０℃粘度１０９Ｐａ・ｓの性状を有し、飽和分
１５質量％、アスファルテン分１０質量％、芳香族分４
６質量％の組成からなり、平均分子量８９０のストレー
トアスファルト８０〜１００に、飽和分１５質量％、ア
スファルテン分１１質量％、芳香族分４５質量％の組成
から成り、平均分子量１２００のアスファルトを全体量
の４０質量％の割合で１４０℃で混合した結果を表２に
示す。Example 5 Softening point 45.5 ° C., penetration (25 ° C.) 83 (1/10 m
m), having a viscosity of 109 Pa · s at 60 ° C., a saturated content of 15% by mass, an asphaltene content of 10% by mass, and an aromatic content of 4%.
A straight asphalt 80 to 100 having an average molecular weight of 890 and a composition of 15% by weight of a saturated component, 11% by weight of an asphaltene, and 45% by weight of an aromatic component. Table 2 shows the results of mixing at 140 ° C. at a ratio of 40% by mass of the above.
【００２５】実施例６
軟化点４５．５℃、針入度（２５℃）８３（１／１０ｍ
ｍ）、６０℃粘度１０９Ｐａ・ｓの性状を有し、飽和分
１５質量％、アスファルテン分１０質量％、芳香族分４
６質量％の組成からなり、平均分子量８９０のストレー
トアスファルト８０〜１００に、飽和分１７質量％、ア
スファルテン分１２質量％、芳香族分４６質量％の組成
から成り、平均分子量１１５０のアスファルトを全体量
の４０質量％の割合で１４０℃で混合した結果を表２に
示す。Example 6 Softening point 45.5 ° C., penetration (25 ° C.) 83 (1/10 m
m), having a viscosity of 109 Pa · s at 60 ° C., a saturated content of 15% by mass, an asphaltene content of 10% by mass, and an aromatic content of 4%.
A straight asphalt 80 to 100 having an average molecular weight of 890 having a composition of 6% by mass and a 17% by mass of saturated portion, 12% by mass of asphaltene, and 46% by mass of an aromatic component having an average molecular weight of 1150 as the asphalt having an average molecular weight of 1150 Table 2 shows the results of mixing at 140 ° C. at a ratio of 40% by mass of the above.
【００２６】[0026]
【表２】 [Table 2]
【００２７】比較例１
軟化点４８．５℃、針入度（２５℃）６２（１／１０ｍ
ｍ）、６０℃粘度１７０Ｐａ・ｓの性状を有し、飽和分
１４質量％、アスファルテン分１２質量％、芳香族分４
４質量％の組成からなり、平均分子量９００のストレー
トアスファルト６０〜８０に、飽和分１４質量％、アス
ファルテン分１５質量％、芳香族分４４質量％の組成か
ら成り、平均分子量９５０のアスファルトを全体量の４
０質量％の割合で１４０℃で混合した結果を表３に示
す。Comparative Example 1 Softening point 48.5 ° C., penetration (25 ° C.) 62 (1/10 m
m), having a viscosity of 60 Pa · s at 60 ° C., a saturated content of 14% by mass, an asphaltene content of 12% by mass, and an aromatic content of 4%.
A straight asphalt 60 to 80 having an average molecular weight of 900 and a composition of 14% by weight of a saturated component, 15% by weight of an asphaltene, and 44% by weight of an aromatic component. Of 4
Table 3 shows the results of mixing at 140 ° C. at a ratio of 0% by mass.
【００２８】比較例２
軟化点４８．５℃、針入度（２５℃）６２（１／１０ｍ
ｍ）、６０℃粘度１７０Ｐａ・ｓの性状を有し、飽和分
１４質量％、アスファルテン分１２質量％、芳香族分４
４質量％の組成からなり、平均分子量９００のストレー
トアスファルト６０〜８０に、飽和分１３質量％、アス
ファルテン分１７質量％、芳香族分４５質量％の組成か
ら成り、平均分子量９７０のアスファルトを全体量の４
０質量％の割合で１４０℃で混合した結果を表３に示
す。Comparative Example 2 Softening point 48.5 ° C., penetration (25 ° C.) 62 (1/10 m
m), having a viscosity of 60 Pa · s at 60 ° C., a saturated content of 14% by mass, an asphaltene content of 12% by mass, and an aromatic content of 4%.
A straight asphalt 60 to 80 having an average molecular weight of 900 and a composition of 13% by weight of a saturated component, 17% by weight of an asphaltene, and 45% by weight of an aromatic component. Of 4
Table 3 shows the results of mixing at 140 ° C. at a ratio of 0% by mass.
【００２９】[0029]
【表３】 [Table 3]
【００３０】比較例３
軟化点４５．５℃、針入度（２５℃）８３（１／１０ｍ
ｍ）、６０℃粘度１０９Ｐａ・ｓの性状を有し、飽和分
１５質量％、アスファルテン分１０質量％、芳香族分４
６質量％の組成からなり、平均分子量８９０のストレー
トアスファルト８０〜１００に、飽和分１５質量％、ア
スファルテン分１１質量％、芳香族分４５質量％の組成
から成り、平均分子量９３０のアスファルトを全体量の
４０質量％の割合で１４０℃で混合した結果を表４に示
す。Comparative Example 3 Softening point 45.5 ° C., penetration (25 ° C.) 83 (1/10 m
m), having a viscosity of 109 Pa · s at 60 ° C., a saturated content of 15% by mass, an asphaltene content of 10% by mass, and an aromatic content of 4%.
A straight asphalt 80 to 100 having an average molecular weight of 890 having a composition of 6% by mass, a composition of 15% by mass of a saturated portion, 11% by mass of an asphaltene, and 45% by mass of an aromatic portion having a composition of an average molecular weight of 930, and Table 4 shows the results obtained by mixing at 140 ° C. at a ratio of 40% by mass.
【００３１】比較例４
軟化点４５．５℃、針入度（２５℃）８３（１／１０ｍ
ｍ）、６０℃粘度１０９Ｐａ・ｓの性状を有し、飽和分
１５質量％、アスファルテン分１０質量％、芳香族分４
６質量％の組成からなり、平均分子量８９０のストレー
トアスファルト８０〜１００に、飽和分１４質量％、ア
スファルテン分１６質量％、芳香族分４６質量％の組成
から成り、平均分子量９５０のアスファルトを全体量の
４０質量％の割合で１４０℃で混合した結果を表４に示
す。Comparative Example 4 Softening point 45.5 ° C., penetration (25 ° C.) 83 (1/10 m
m), having a viscosity of 109 Pa · s at 60 ° C., a saturated content of 15% by mass, an asphaltene content of 10% by mass, and an aromatic content of 4%.
A straight asphalt 80 to 100 having an average molecular weight of 890 having a composition of 6% by mass and a composition of 14% by mass of a saturated portion, 16% by mass of asphaltene, and 46% by mass of an aromatic portion having an average molecular weight of 950, and the entire amount of asphalt having an average molecular weight of 950 Table 4 shows the results obtained by mixing at 140 ° C. at a ratio of 40% by mass.
【００３２】[0032]
【表４】 [Table 4]
【００３３】実施例１〜６は、元のストレートアスファ
ルト６０〜８０、及び８０〜１００と比較して、軟化
点、針入度共に変化がなく、６０℃粘度のみが大幅に増
大していることから、粘度増大に関して非常に効果的で
ある。一方、比較例１においては、針入度低下に伴い、
粘度増大は確認できるが、混合するアスファルトの平均
分子量が小さいために、その効果は小さく、６０℃粘度
が２００Ｐａ・ｓを上回る位まで増大することができな
い。比較例３においては針入度、軟化点変化はないが、
混合するアスファルトの平均分子量が小さいため、粘度
増大効果が確認できない。また、比較例２、４において
は、アスファルテン分の多いアスファルトを混合するた
めに、粘度はある程度増大するが、それに伴い軟化点の
増大と針入度の減少が大きく、針入度の減少量が４（１
／１０ｍｍ）を超えてしまう。針入度減少を小さくする
ために、混合量を少なくした場合、粘度の増大が小さく
なる。故に比較例２、４は粘度増大に関して効果的では
ない。In Examples 1 to 6, the softening point and the penetration were not changed and only the viscosity at 60 ° C. was significantly increased as compared with the original straight asphalts 60 to 80 and 80 to 100. Is very effective in increasing viscosity. On the other hand, in Comparative Example 1, with a decrease in penetration,
Although an increase in viscosity can be confirmed, the effect is small because the average molecular weight of the asphalt to be mixed is small, and the viscosity at 60 ° C. cannot be increased to a level exceeding 200 Pa · s. In Comparative Example 3, there is no change in penetration and softening point,
Since the average molecular weight of the asphalt to be mixed is small, the effect of increasing the viscosity cannot be confirmed. In Comparative Examples 2 and 4, the viscosity is increased to some extent because asphalt containing a large amount of asphaltene is mixed, but the softening point and the decrease in penetration are greatly increased, and the decrease in penetration is large. 4 (1
/ 10 mm). When the amount of mixing is reduced to reduce the decrease in penetration, the increase in viscosity is reduced. Therefore, Comparative Examples 2 and 4 are not effective in increasing the viscosity.
【００３４】[0034]
【発明の効果】本発明により、６０℃粘度が小さい舗装
用ストレートアスファルトの、軟化点、及び針入度をほ
とんど変化させずに、６０℃粘度のみを増大させること
が可能である。According to the present invention, it is possible to increase only the viscosity at 60 ° C. of the straight asphalt for pavement having a low viscosity at 60 ° C. without substantially changing the softening point and the penetration.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高木 清美 埼玉県幸手市権現堂1134−２ 株式会社 コスモ総合研究所 研究開発センター内 (56)参考文献 特開 昭52−74616（ＪＰ，Ａ) 特開 昭53−97017（ＪＰ，Ａ) 特開 平６−220330（ＪＰ，Ａ) 特開 昭57−87461（ＪＰ，Ａ) 特開 昭57−85855（ＪＰ，Ａ) 特開 平９−95616（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C08L 95/00 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kiyomi Takagi 1134-2 Gongendo, Satte City, Saitama Prefecture Cosmo Research Institute, Inc. Research and Development Center (56) References JP-A-52-74616 (JP, A) JP-A-53-97017 (JP, A) JP-A-6-220330 (JP, A) JP-A-57-87461 (JP, A) JP-A-57-85855 (JP, A) JP-A-9-95616 (JP, A) JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) C08L 95/00
Claims (2)
有するストレートアスファルトに、平均分子量１０００
〜２０００のアスファルト類が５〜６０質量％配合され
ていることを特徴とする舗装用ストレートアスファルト
組成物。A straight asphalt having a viscosity of 60 to 200 Pa · s at 60 ° C. has an average molecular weight of 1000
A straight asphalt composition for pavement, comprising 5 to 60% by mass of asphalts of up to 2000.
０〜１２０（１／１０ｍｍ）、６０℃粘度６０〜２００
Ｐａ・ｓの性状を有し、飽和分５〜２５質量％、アスフ
ァルテン分５〜２０質量％、芳香族分３５〜６０質量％
の組成から成るストレートアスファルトに、飽和分５〜
２５質量％、アスファルテン分５〜２０質量％、芳香族
分３５〜６０質量％の組成から成り、平均分子量１００
０〜２０００のアスファルト類が５〜６０質量％配合さ
れていること特徴とする舗装用ストレートアスファルト
組成物。2. Softening point 40-55 ° C., penetration (25 ° C.) 4
0 to 120 (1/10 mm), 60 ° C viscosity 60 to 200
It has properties of Pa · s, and has a saturated content of 5 to 25% by mass, an asphaltene content of 5 to 20% by mass, and an aromatic content of 35 to 60% by mass.
Straight asphalt consisting of
25 mass%, 5 to 20 mass% of asphaltene content, 35 to 60 mass% of aromatic content, and an average molecular weight of 100
A straight asphalt composition for pavement, comprising 0 to 2000 asphalts in an amount of 5 to 60% by mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17726196A JP3537598B2 (en) | 1996-06-18 | 1996-06-18 | Straight asphalt composition for paving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17726196A JP3537598B2 (en) | 1996-06-18 | 1996-06-18 | Straight asphalt composition for paving |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH101613A JPH101613A (en) | 1998-01-06 |
| JP3537598B2 true JP3537598B2 (en) | 2004-06-14 |
Family
ID=16027980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17726196A Expired - Fee Related JP3537598B2 (en) | 1996-06-18 | 1996-06-18 | Straight asphalt composition for paving |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3537598B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI235739B (en) * | 1999-02-02 | 2005-07-11 | Shell Int Research | Solid-state composition comprising solid particles and binder |
| JP2002121387A (en) * | 2000-10-13 | 2002-04-23 | Jsr Corp | Asphalt modifier and modified asphalt composition |
| JP3848935B2 (en) * | 2003-06-30 | 2006-11-22 | 新日本石油株式会社 | Paving asphalt |
| JP5238133B2 (en) * | 2006-02-10 | 2013-07-17 | Ｊｘ日鉱日石エネルギー株式会社 | Asphalt continuous manufacturing method |
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1996
- 1996-06-18 JP JP17726196A patent/JP3537598B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH101613A (en) | 1998-01-06 |
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