JP2002060628A - Asphalt composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide asphalt which can save energy, greatly decrease a content of a substance causing a toxic problem or the like and increase a recycling number by decreasing a mixing temperature in manufacturing a mixed material. SOLUTION: A reduced pressure distillation residue of a crude oil is subjected to a hydrogenation treatment at a temperature of not lower than 350 deg.C under an pressure of not lower than 12.0 MPa in an atmospheric hydrogen content of 70 to 90% in a fluidized catalyst bed and further a light component of at least more than 50 mass % is removed at a temperature of not lower than 300 deg.C under a pressure of not more than 13.8 kPa.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt composition used for pavement of roads, waterproof sheets, sound insulation sheets, roofing, steel pipe coating and the like.

[0002]

2. Description of the Related Art Asphalt, which has been used for pavement of roads, is a bituminous substance obtained by subjecting crude oil to a normal pressure / vacuum distillation apparatus to remove light components, and is also called straight asphalt. ing. In addition, resin or rubber is blended with straight asphalt,
Functional asphalt with enhanced functions such as adhesive strength is used for applications such as permeable pavement.

[0003] When these various asphalts are used for, for example, road pavement, a blending operation under a high temperature is performed in order to uniformly mix the asphalt and the aggregate such as gravel at a predetermined ratio. Have been done. (In this application,
A mixture in which aggregate such as gravel and asphalt are uniformly mixed at a predetermined ratio is referred to as “mixture”. Also, after the blending operation, a so-called curing operation of maintaining a high temperature for a certain time is performed in order to adjust the asphalt to the aggregate. Further, when performing the so-called pavement work in which the mixture is spread and compacted on a road, the mixture is heated to a predetermined temperature.

[0004] After a predetermined period (usually about 5 years) has elapsed, the mixture used for pavement on the road, etc., has reached the end of its life as a pavement surface. In the meantime, the asphalt functioning as the binder of the aggregate deteriorates, hardens and becomes brittle, and loses the function as the binder originally required for asphalt.

[0005] After the end of its life, the asphalt regenerated oil rich in aromatic oil is added and mixed in order to soften the asphalt contained therein after pulverization. Will be played as The recycled mixture is used again for road paving materials.

[0006]

However, the asphalt used so far has an unnecessarily high viscosity. Asphalt has the property that the viscosity decreases as the temperature increases. Therefore, in order to lower the viscosity to an appropriate level, it was necessary to set a high heating temperature during the blending operation of the mixture. Here, the mixing ratio (mass ratio) of aggregate and asphalt in the blending operation is
The asphalt is about 6 for the aggregate 100. Therefore, in order to reduce the viscosity of the asphalt to an appropriate level, it is necessary to heat the aggregate to a high temperature even in an amount 10 times or more the amount of the aggregate. Similarly, in the curing step after the mixing operation and in the compaction step in road construction, there is a problem that the aggregate must be heated at least 15 times the amount thereof in order to reduce the asphalt viscosity. Therefore, enormous energy has been input to heating in each of the steps of blending, curing, and compacting.

Further, since each of the blending, curing, and compacting operations is performed at a high temperature, there is a problem that the asphalt itself deteriorates due to heat and oxidation during the process. There is also a problem that the life as a road pavement material is shortened due to the oxidative deterioration and the like. Furthermore, because of this, the number of reusable times was limited, and there was a demand to increase the number of reusable times.

Further, since road pavement work is also performed in towns, toxicity and odor of sulfur compounds such as hydrogen sulfide caused by sulfur contained in asphalt have been a problem.

In the present invention, energy saving can be achieved by lowering the mixing temperature during the production of the mixture, etc., and the content of substances that pose problems such as toxicity is greatly reduced.
Another object of the present invention is to provide asphalt that can be recycled more frequently.

[0010]

SUMMARY OF THE INVENTION Crude oil heavier phenomena are increasing in proportion to the discovery of new oil reserves. on the other hand,
Due to environmental problems and the like, the demand structure of petroleum products is becoming lighter and lighter, and there is a large gap between the supply and demand sides of supply and demand between petroleum products. In order to cope with such a situation, for example, a fluid catalytic cracking device and an advanced hydrogen cracking device capable of obtaining light products from heavy crude oil have been introduced and operated. When these devices are operated, a residual oil / reduced residual oil is always produced at a constant rate. Conventionally, most of these residual oils have been consumed as fuel oil base materials.

The inventor of the present application has found that the residual oil / reduced pressure residual oil of the above-mentioned advanced hydrogen cracking apparatus which has been subjected to a predetermined treatment can be diverted to the use of conventional asphalt, and the aforementioned problems inherent in the conventional asphalt. Can solve most of the problems.

Hereinafter, the present invention will be described.

According to the first aspect of the present invention, the residue obtained by distillation under reduced pressure of crude oil is subjected to hydrogenation treatment at a temperature of 350 ° C. or more, a pressure of 12.0 MPa or more, an atmosphere hydrogen concentration of 70 to 90%, and a fluidized catalyst bed. Temperature 300 ° C or higher, pressure 13.8k
The above object is achieved by an asphalt composition containing a residue obtained by removing 50% by mass or more of light components under Pa or less.

Here, a temperature of 350 ° C. or more and a pressure of 12.
The step of hydrotreating under 0 MPa or more, an atmosphere hydrogen concentration of 70 to 90%, and a fluidized catalyst bed is a step of highly hydrocracking a crude oil under reduced pressure distillation residue. In addition, temperature 30
The step of removing 50% by weight or more of light components under the conditions of 0 ° C. or more and a pressure of 13.8 kPa or less is a middle distillate generated by partially decomposing a reduced pressure distillation residue in the advanced hydrogen cracking step. This is the step of separating the minute from the residue. In the following, the residue from which the light components have been further removed through the advanced hydrogen cracking step is referred to as “advanced hydrogen cracking step residue”. The asphalt composition according to the invention of claim 1 is, in other words, an asphalt composition containing a residue from the advanced hydrogen cracking step. Also,
Asphalt composition containing advanced hydrogen cracking process residue,
It is a concept that includes the advanced hydrogen cracking process residue alone (100% by mass), the blend of the advanced hydrogen cracking process residue and conventional asphalt, and the addition of functional materials such as resin and rubber to these. .

According to the present invention, a new use as asphalt can be given to the residue of the advanced hydrogen cracking process, which was conventionally only used as a fuel oil base.

Through the above-mentioned advanced hydrogen cracking step, each component in the crude oil undergoes a predetermined change. That is, asphaltene in a micellar state in which condensed aromatic, oligomer, and resin molecules are stacked in layers, the micelles expand, the bonding state connecting the micelles is loosened, and most of the asphaltene is changed to an oligomer or a resin. Molecules that are unstable to heat, ultraviolet rays, and oxidation existing in the resin component are replaced with hydrogen atoms, and become a chemically and physically stable resin. A hydrogen atom is added to an aromatic oil component such as an unstable aromatic compound or a double bond such as an olefin component in a highly irritating aromatic compound to change into a stable aromatic oil component. In addition, the linear molecules forming a part of the aromatic component molecules are separated from the aromatic molecules by hydrogenation, and change into saturated hydrocarbons having a relatively small molecular weight. Saturated hydrocarbon oils, particularly straight-chain hydrocarbons having 7 or more carbon atoms, are all decomposed and removed. Therefore, what is called a wax component is not included at all. Nitrogen-based, sulfur-based, and oxygen-based polar substances are removed by advanced hydrogenation.

As an example, the residual oil obtained by distillation under reduced pressure is used as a raw material at a temperature of 440 ° C., a pressure of 19.25 MPa, and a pressure of 80 ° C.
% Hydrogen / fluidized alumina bed catalyst, and then subjected to a hydrogenation treatment at a temperature of 365 ° C. and a pressure of 4.14 kPa.
Table 1 shows the quantitative changes that each component in the composition obtained as a residue of the advanced hydrogen cracking process has undergone during the above treatment when at least 50% by mass or more of the light components are removed under the conditions described in Table 1.
Shown in The residual oil from vacuum distillation used as a raw material here corresponds to conventional asphalt.

In Table 1, "JPI method" means
This is a test method specified by the Japan Petroleum Institute. (The same applies hereinafter.) A flow of the analysis is shown in FIG. 4 for reference.

[0019]

[Table 1]

Due to the component changes shown in Table 1, the residue of the advanced hydrogen decomposition step after the treatment is different from the physical properties of the conventional asphalt. As a result, the physical properties of the asphalt composition of the present invention are also different from those of the conventional asphalt. The features of the asphalt composition according to the second to seventh aspects of the present invention described below are mainly derived from the characteristics of the residue from the advanced hydrogen cracking step. Therefore,
The mixing ratio of the residue of the advanced hydrogen cracking step in the asphalt composition of the present invention is 50% by mass or more, more preferably 70% by mass, in order to make use of the characteristics of the residue of the advanced hydrogen cracking step.
It is desirable that the above is maintained.

The kinematic viscosity of the asphalt composition of the present invention at a temperature of 100 ° C. is 200.
２０００2000 mm ² / s. The measurement of kinematic viscosity here
According to the method specified in JIS K 2207 6.14. This range of kinematic viscosity is lower than that of conventional asphalt. Due to such a reduction in viscosity, the mixing temperature, curing temperature, and compaction work temperature of the pavement material can be kept low. Therefore, energy saving in each step is realized by lowering these temperatures in each step. Further, the degree of oxidative deterioration and thermal deterioration of asphalt itself progressing through each step can be suppressed to a low level.

In addition, as set forth in claim 3, the asphalt composition of the present invention has a resin content of 25% by mass or more, and contains more resin than conventional asphalt. Due to such properties, the amount of asphalt added at the time of mixing the mixture can be reduced. This is because the resin plays a central role in the asphalt as a binder for linking aggregates. Further, the number of times of reusing the mixture used for the road pavement can be increased.
In addition, when regenerating a mixture using conventional asphalt, the number of times of regeneration can be increased by adding the asphalt composition of the present invention. Further, by doing so, it is possible to dispense with the use of regenerated oil containing a large amount of highly harmful polycyclic aromatics, which has been conventionally used in regenerating composite materials.

[0023] As described in claim 4, the asphalt composition of the present invention has a sulfur content of 2.0% by mass or less. Due to such properties, generation of harmful hydrogen sulfide and sulfur compounds such as mercaptan during mixing of the mixture and pavement work is extremely small, and a safe working environment can be realized. In addition, since there is almost no generation of offensive odor due to these substances, the degree of freedom of road pavement work around the residential area can be increased.

[0024] As described in claim 5, the asphalt composition of the present invention has a nitrogen content of 0.2% by mass or less. Due to such properties, heat resistance and oxidation resistance can be further enhanced, and the degree of deterioration due to high temperature during mixing, curing, and compaction work of the mixture, and deterioration over time due to long-term use as a road surface material are suppressed. be able to.

According to a sixth aspect of the present invention, the above object is achieved by a mixture in which the asphalt composition according to any one of the first to fifth aspects is mixed.

According to the present invention, it is possible to obtain a mixture in which the asphalt composition having the features according to claims 1 to 5 is mixed.

According to a seventh aspect of the present invention, there is provided the composite material according to the sixth aspect, which is used for permeable pavement. According to this invention, the characteristics of the asphalt composition of claims 1 to 5 can be utilized for permeable pavement by using the mixture of claim 6 for permeable pavement.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below. In addition,
In the following description, the residue of the advanced hydrogen cracking process is 100
%, That is, an asphalt composition in which conventional asphalt or the like is not blended will be described as an example.

FIG. 1 is a diagram showing an example of a process for producing the asphalt composition of the present invention. The starting material for this production process is crude oil. The type of the crude oil used in the present invention is not particularly limited, and any type of crude oil can be used. For example, a paraffinic Middle Eastern crude such as Arabian light, Murban and berry can be used. Indonesian crude oil such as paraffin-rich Minas crude oil, Chinese crude oil such as Daqing crude oil, naphthenic Venezuela and Australian crude oil may be used. In the asphalt composition of the present invention, the bottom 4 of the atmospheric distillation apparatus 1 is applied to the vacuum distillation apparatus 2, and the bottom 5 is treated with the advanced hydrogenation apparatus 3, and then the middle distillate (light fraction) 6 is removed. Bottom (residual)
7 can be obtained. In contrast, the conventional asphalt 8 is obtained from the bottom (residue) 5 processed by the vacuum distillation apparatus 2.

According to the knowledge of the inventor of the present invention, as the actual operating conditions, the residue obtained by distillation under reduced pressure of crude oil was subjected to a temperature of 440 ° C. and a pressure of 1
The most economical method is to perform hydrogenation treatment under a fluidized alumina catalyst bed under an atmosphere hydrogen concentration of 80% under 9.25 MPa, and further remove light components under the conditions of a temperature of 365 ° C. and a pressure of 4.14 kPa. Operation is performed.

Table 2 shows the properties of the conventional asphalt and the asphalt composition according to the present invention (residue from the advanced hydrogen cracking step) in comparison. Here as conventional asphalt,
In Table 1 (classification of straight asphalt and blown asphalt) of JIS K 2207, straight asphalt 60-80 (penetration degree 60 at 25 ° C.)
And 80 or less), which is representative of asphalt treated with Kafuji crude oil.

[0032]

[Table 2]

As is apparent from Table 2, the asphalt composition of the present invention has the asphaltene amount reduced by one third as compared with the conventional asphalt. Therefore, molecules unstable to changes such as oxidation are removed, so that asphalt excellent in heat resistance, oxidation resistance, and ultraviolet light resistance can be obtained. Also, the asphaltene component impairs the compatibility with the third component, but the asphalt composition of the present invention contains only one third of the asphaltene content of the conventional asphalt. Therefore, the mixing time when producing a functional asphalt by blending a resin component or a rubber component for the purpose of extending the life, increasing the water permeability, and increasing the durability can be greatly reduced. Furthermore, it is also said that the asphaltene component is harmful to the human body according to one theory, and the asphalt composition of the present invention is less likely to be dust because the harmful asphaltene component has been changed to a highly sticky resin component. It is also advantageous for environmental pollution when flying.

The asphalt composition of the present invention has a resin content of about 50% as compared with the conventional asphalt.
Contains a lot. Therefore, it is possible to reduce the asphalt mixing ratio in the mixture from 6% to 4% as compared with the conventional case. The reason why asphalt is mixed with the mixture is to allow it to function as a binder for gravel and the like, and the resin plays a central role in that.

For reference, the mixing ratio of the mixture in the case of using the asphalt composition of the present invention and in the case of using the conventional asphalt is shown in Table 3 as an example.

[0036]

[Table 3]

Further, when the asphalt composition of the present invention is used for permeable pavement, the mixing ratio in the mixture is smaller than that of conventional asphalt, so that the porosity of the mixture can be increased, and the water permeability can be improved. Can be improved. In addition, the mixing ratio of the third component such as resin or resin can be reduced, and the cost can be reduced accordingly.

Generally, as shown in FIG. 2, when the mixture is recycled, the resin content in the asphalt is said to decrease by 16.7% per recycling. On the other hand, the minimum resin content of asphalt in recycled mix is said to be 20%. Therefore, when a conventional mixture using asphalt is used for recycling, the use limit is reached by two recyclings (see point A in FIG. 2). On the other hand, when recycling the mixture using the asphalt composition of the present invention, 20
It can be recycled four times before reaching the% limit (see point B in FIG. 2).

Furthermore, the asphalt composition according to the present invention has a greatly reduced sulfur and nitrogen content as compared with conventional asphalt due to a high degree of hydrogenation.
It becomes stable against heat, oxidation, and ultraviolet rays, and can exhibit sufficient durability against deterioration over time of the road surface, for example, the phenomenon of exfoliation of aggregate, cracks, rutting, and the like.

Table 4 shows the thin film heating test method (JIS K2
207 6.8) shows a comparison between the asphalt composition according to the invention and conventional asphalt.

[0041]

[Table 4]

Here, the thin film heating test is a test in which a 3.2 mm sample of asphalt thin film is heated in a high-temperature air bath at 160 ° C. for a predetermined time. JIS K 2207
In 6.8, the heating time is specified as 5 hours, but here, both were compared under two conditions of 3 hours and 120 hours.

The penetration indicates the hardness of the asphalt and is represented by the length of a predetermined needle vertically entering a sample under specified conditions. The penetration is JIS K 2207 6.
3 specifies the test method, and specifies that the measurement be performed at 25 ° C. However, the asphalt composition of the present invention has a large absolute value of penetration (soft) and cannot be measured by the method specified in JIS. . Therefore, in Table 4, the test results are displayed according to the penetration remaining rate so that the influence of the error due to the difference in the measured temperature is reduced.

The asphalt composition of the present invention has a high penetration penetration ratio after any heating time. Asphalt has a reduced penetration due to deterioration due to heating. Therefore, it is clear that the asphalt composition of the present invention has a small degree of deterioration due to heating.

The thin film heating mass change is used to evaluate the tendency of the thin film asphalt to deteriorate due to heating. That is, the asphalt in which the surface of the aggregate in the mixture is coated as a binder reproduces the heating received in each of the mixing, curing, and compaction steps as a test. The thin film heating mass change (%) is measured by measuring the mass change of the sample after overheating.
Expressed as a percentage of the mass of the pre-heated sample. It can be seen that the asphalt composition of the present invention has only a slight change after any heating time, and that the asphalt composition is less likely to be deteriorated by heating in the form of a thin film.

The elongation indicates the ductility of asphalt. When both ends of a sample having a specified shape are pulled at a specified temperature and a specified speed, the distance that the sample extends until the sample is cut is expressed in cm. Therefore, elongation indicates the flexibility of asphalt to temperature. The road surface repeatedly expands and contracts due to the temperature difference between day and night. If the repetition of the expansion and contraction exceeds the limit, cracks and cracks occur. Therefore, the elongation is an index indicating the temperature followability of asphalt. The high elongation at each temperature means that the material has good temperature followability, and a mixture in which such asphalt is mixed has high durability as a result. Further, the elongation indicates one end of the degree of spreadability of asphalt as a binder covering the aggregate surface in the mixture. JIS K2
207 Straight asphalt 60 in “Quality of straight asphalt and blown asphalt” in Table 3
According to the quality standard of -80 (the penetration at 25 ° C is more than 60 and 80 or less), the elongation at 15 ° C is “1”.
00 or more ". Conventional asphalt has a heating time of 1
Failure to comply with this standard in 20 hours. On the other hand, the asphalt composition according to the present invention conforms to this standard even when the heating time is 120 hours. Therefore, it can be seen that the asphalt composition according to the present invention is less likely to decrease in elongation due to deterioration than conventional asphalt, and is an asphalt suitable for long-term use.

Further, as is apparent from Table 2, the asphalt composition according to the present invention has a wax content removed, so that the aggregates caused by wax precipitation can be peeled off,
The occurrence of cracks and the like is prevented.

The kinematic viscosity of the asphalt composition according to the present invention is lower than that of conventional asphalt at any temperature (see Table 2 and FIG. 3). Normally, asphalt has a kinematic viscosity of 180 mm ² / s when mixing the mixture.
It must be heated until: When the mixture is used as a road pavement material and compacted at a road construction site, the asphalt has a kinematic viscosity of 300 mm ² / s.
It must be heated until:
(Edited and published by the Japan Road Association, 5th edition of the “Asphalt Pavement Outlines” revised edition (November 18, 1993) No. 9
See page 0. This is because it is necessary to sufficiently infiltrate the asphalt into the aggregate when mixing and compacting the mixture, and for this purpose the kinematic viscosity of the asphalt must be lower than a predetermined value. As also shown in Table 2, the asphalt composition according to the present invention has a size of 300 mm ² /
s and the heating temperature for lowering the viscosity to 180 mm ² / s at the time of mixing the mixture, compared with conventional asphalt,
It can be as low as 0 degrees C. Therefore, energy saving can be achieved by the lower temperature. As described above, in both the compaction and the mixing of the mixture, in order to raise the temperature of the asphalt to a predetermined temperature, it is necessary to heat the entire aggregate having a mass slightly more than 15 times that of the aggregate. Therefore, an enormous amount of energy can be saved by setting the heating temperature to be slightly lower than 30 ° C.

Incidentally, asphalt magazine Vol. 40.
No. On page 20 of 195, Tamotsu Yoshinaka and Nobuyuki Nemoto disclose a trial calculation of the relationship between the mixture temperature and the carbon dioxide emission per ton of mixture. According to this description, under the condition that the water content of the aggregate is 3% and the outside temperature is 30 ° C.,
Heating temperature 150 ° C (Kinematic viscosity 18
0 mm ² / s).
The amount of carbon dioxide generated by the combustion of fuel oil required for heating is about 18.5 kilograms per ton of aggregate. On the other hand, under the same conditions, at a heating temperature of 117 ° C. (corresponding to a temperature at which the kinematic viscosity of the asphalt composition of the present invention decreases to a kinematic viscosity of 180 mm ² / s), it is generated with the combustion of fuel oil required for heating. The amount of carbon dioxide generated is about 15.5 kilograms per ton of aggregate. Thus, by using the asphalt composition of the present invention, the amount of carbon dioxide generated is reduced by about 16%. This is understood to mean that about 16% of energy saving has been achieved.

Next, the results of a trial calculation of the energy comparison by the present inventor will be shown. As described above, when the asphalt composition of the present invention is used, the amount of asphalt in the mixture can be reduced. Here, however, a trial calculation was performed using the same asphalt as the conventional asphalt. Table 5 shows the results of a trial calculation for the conventional asphalt, and Table 6 shows the results of the trial calculation for the asphalt composition of the present invention. Here, the energies are indexed and compared using dimensionless quantities.

[0051]

[Table 5]

[0052]

[Table 6]

As can be seen by comparing the heating energy per 100 parts of the mixture at the bottom of each of Tables 5 and 6, the mixture was mixed using the asphalt composition of the present invention. The required energy (index) is 2796. On the other hand, the required energy (index) when using the conventional asphalt is 3846, which indicates that about 27% of energy saving can be realized by using the asphalt composition of the present invention. .

Also, in the case of heating during compaction at a road construction site, the use of the asphalt composition of the present invention makes it possible to keep the heating temperature as low as 30 ° C. or more.
A similar energy saving effect is realized. Further, immediately after the mixing of the mixture, the mixture needs to be maintained near the mixing temperature for curing, but also in this work process, the asphalt composition of the present invention realizes energy saving because the holding temperature can be lowered. be able to.

Further, since each of the mixing, curing and compaction steps is performed at a low temperature, it is possible to obtain asphalt which is less susceptible to oxidative degradation and thermal degradation in combination with the low nitrogen content. .

Further, as shown in Table 2, the asphalt composition of the present invention has a Fraser embrittlement point lower by 15 ° C. than the conventional asphalt. Here, the Fraas embrittlement point indicates the flexibility of asphalt at low temperatures.
The temperature at which the asphalt film becomes brittle and cracks when the asphalt film on the steel sheet is cooled and bent under specified conditions. Therefore, the asphalt composition of the present invention can exhibit sufficient performance as an aggregate binder even when used as a pavement mixture in a low-temperature region.

[0057]

As described above, the asphalt composition of the present invention provides a new use to the residue of the advanced hydrogen cracking process which has been used only as a conventional fuel oil.

Since the asphalt composition of the present invention has a low asphaltene content, asphalt excellent in heat resistance, oxidation resistance and ultraviolet light resistance can be obtained.
In addition, the asphalt composition of the present invention contains only one third of the asphalt content of the conventional asphalt, so that the resin component and the rubber component are used for the purpose of extending the life, increasing the water permeability, and increasing the durability. The mixing time when blending to produce functional asphalt can be significantly reduced. Further, since the asphalt composition of the present invention has a low content of harmful asphaltene components, it is advantageous for environmental pollution when scattered as dust.

The asphalt composition of the present invention has a low kinematic viscosity at any temperature.
The temperature of both curing and compaction at the pavement construction site can be lowered, and energy can be saved. In addition, since these temperatures are low, the degree of oxidative deterioration and thermal deterioration during each work process can be suppressed to a low level in combination with the low nitrogen content.

Since the asphalt composition of the present invention has a large amount of resin, it is possible to increase the number of recycles of the mixture. Also, when producing functional asphalt,
The mixing ratio of resin and rubber can be reduced to contribute to cost reduction.

Since the asphalt composition of the present invention has a low sulfur content, harmful hydrogen sulfide and sulfur compounds such as mercaptan are generated in a very small amount at the time of mixing the mixture and pavement work. Work environment can be realized. Further, since there is almost no generation of offensive odor due to these substances, it is advantageous for road pavement work around residential areas.

In addition, the asphalt composition of the present invention has a significantly reduced content of sulfur and nitrogen due to a high degree of hydrogenation as compared with conventional asphalt, so that it is stable against heat, oxidation and ultraviolet rays. In addition, sufficient durability can be exhibited against deterioration over time of the road surface, for example, the phenomenon of peeling of aggregates, cracks, rutting, and the like. Further, since the asphalt composition according to the present invention has a wax component removed, peeling of aggregates and cracks caused by wax precipitation are prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing a manufacturing process.

FIG. 2 is a diagram showing a change in resin content due to recycling.

FIG. 3 is a relationship diagram between viscosity and temperature.

FIG. 4 is a flow chart of asphalt composition analysis (JPI-5)
S-22-83)

Claims (7)

[Claims] 1. A vacuum distillation residue of crude oil is subjected to a temperature of 350 ° C. or more, a pressure of 12.0 MPa or more, and an atmosphere hydrogen concentration of 70 to 9
An asphalt composition containing 0% and a residue obtained by subjecting to a hydrogenation treatment under a fluidized catalyst bed and removing 50% by mass or more of light components at a temperature of 300 ° C. or more and a pressure of 13.8 kPa or less. 2. A kinematic viscosity at a temperature of 100 ° C. is 200.
2. The method according to claim 1, wherein the thickness is from about 2000 mm ² / s.
3. The asphalt composition according to item 1. 3. The asphalt composition according to claim 1, wherein the resin content is 25% by mass or more. 4. The asphalt composition according to claim 1, wherein the sulfur content is 2.0% by mass or less. 5. The asphalt composition according to claim 1, wherein the nitrogen content is 0.2% by mass or less. 6. A mixture in which the asphalt composition according to claim 1 is mixed. 7. The composite material according to claim 6, wherein the application is permeable pavement.