JP3447261B2 - Asphalt composition - Google Patents

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 normally removing crude oil by subjecting crude oil to atmospheric distillation under reduced pressure, and is also called straight asphalt. ing. Also, blend resin and rubber into straight asphalt,
Functional asphalt with enhanced functions such as adhesive strength is used for applications such as water-permeable pavement.

When these various asphalts are used for road pavement applications, for example, since the aggregates such as gravel and the asphalt are uniformly mixed at a predetermined ratio, a blending operation under high temperature is performed. It is being appreciated. (In the present application,
A mixture of aggregate such as gravel and asphalt uniformly at a predetermined ratio is called "mixture". ) Further, after the blending work, so-called curing work in which the high temperature is kept for a certain period of time is performed in order to make the asphalt familiar to the aggregate. Further, even when performing so-called pavement work in which the composite material is spread on a road and compacted, the composite material is heated to a predetermined temperature.

The composite material used for pavement of roads, etc., ends its life as a paved surface after a lapse of a predetermined period (usually about 5 years). During that time, the asphalt functioning as a binder for the aggregate deteriorates, hardens and becomes brittle, and loses the function as a binder originally required for asphalt.

After crushing, the mixture that has reached the end of its life is mixed with a predetermined amount of asphalt regenerated oil rich in aromatic oils for the purpose of softening the asphalt contained in the mixture. To be played as. The recycled mixture is used again as paving material for roads.

[0006]

However, the asphalt used so far has a viscosity higher than necessary. The viscosity of asphalt has the property of decreasing as the temperature increases. Therefore, in order to reduce the viscosity to an appropriate level, it was necessary to set the heating temperature high during the blending work of the mixture. Here, the mixing ratio (mass ratio) of the aggregate and asphalt in the blending work is
It is about 6 asphalt for 100 aggregates. Therefore, in order to reduce the viscosity of asphalt to an appropriate level, it is necessary to heat even aggregates in an amount 10 times or more that high temperature. Similarly, in the curing step after the mixing operation and the compaction step in road construction, there is a problem that the aggregate needs to be heated in an amount 15 times or more that of the asphalt in order to reduce the asphalt viscosity. Therefore, enormous amount of energy is applied to heating in each process of blending work, curing work and compaction work.

Further, since the blending work, the curing work, and the compacting work are carried out under high temperature, there is a problem that the asphalt itself is thermally and oxidatively deteriorated during the process. There is also a problem that the life as a road pavement material is shortened due to this oxidative deterioration and the like. Further, as a result of this, the number of times it can be reused has been limited, and there has been a demand for increasing the number of times of reuse.

Further, since road pavement work is carried out even in towns, the toxicity and malodor of sulfur compounds such as hydrogen sulfide due to the sulfur content in asphalt has been a problem.

Therefore, in the present invention, energy saving can be achieved by lowering the mixing temperature at the time of manufacturing the composite material, and the content of the substance causing toxicity and the like is significantly reduced,
Moreover, the purpose is to provide asphalt that can be recycled many times.

[0010]

[Means for Solving the Problems] The crude oil heaviness phenomenon is increasing in proportion to the discovery of new crude oil reserves. on the other hand,
Due to environmental issues and the like, the demand structure for petroleum products is becoming lighter, and there is a large gap in the supply-demand balance between the petroleum products on the supply side and the demand side. In order to cope with such a situation, a fluid catalytic cracking apparatus, an advanced hydrogen cracking apparatus, or the like, which can obtain a light product from heavy crude oil, has been introduced and is operating. When these devices are operated, the residual oil / reduced pressure residual oil is always produced at a constant rate. Conventionally, most of these residual oils have been consumed as fuel oil base stocks.

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

The present invention will be described below.

According to the invention of claim 1, the vacuum distillation residue of crude oil is subjected to hydrogenation treatment at a temperature of 350 ° C. or higher, a pressure of 12.0 MPa or higher, an atmospheric hydrogen concentration of 70 to 90%, and under a fluidized catalyst bed, and Temperature 300 ° C or higher, pressure 13.8k
The above problem is solved by an asphalt composition containing a residue obtained by removing 50% by mass or more of light components under a condition of Pa or less.

Here, the temperature is 350 ° C. or higher and the pressure is 12.
The step of performing hydrogenation treatment at 0 MPa or more, atmospheric hydrogen concentration of 70 to 90%, and under a fluidized catalyst bed is a step of highly hydrolyzing a vacuum distillation residue of crude oil. Also, the temperature is 30
The step of removing 50% by mass or more of light components under conditions of 0 ° C. or higher and a pressure of 13.8 kPa or lower is an intermediate distillation produced by decomposing a part of the vacuum distillation residue in the advanced hydrogenolysis step. This is the process of separating the minute and the residual. Hereinafter, the residue from which the light components have been removed after the advanced hydrogenolysis step is referred to as "advanced hydrogenolysis step residue". In other words, the asphalt composition according to the invention of claim 1 is an asphalt composition containing an advanced hydrogenolysis step residue. Also,
What is an asphalt composition containing the residue of advanced hydrogenolysis step?
(1) Remaining advanced hydrogen decomposition process residue and conventional asphalt
Blended products, resins and rubbers in the blended products
With the addition of functional materials such as
Add functional materials such as resin and rubber to the residue of the elementary decomposition process.
(2) Advanced hydrogen
It is a concept that includes only the disassembly process residue alone
There is also .

According to the present invention, a new use as asphalt can be given to the residue in the advanced hydrogenolysis step which has been conventionally used only as a fuel oil base material.

Through the above-mentioned advanced hydrogenolysis step, each component in crude oil undergoes a predetermined change. That is, asphaltene, which is in a micelle-like state in which condensed aromatic, oligomer, and resin molecules are piled up in layers, each micelle expands, the bonding state connecting the micelles becomes loose, and most of the asphaltene changes to an oligomer or resin. Molecules existing in the resin which are unstable to heat, ultraviolet rays and oxidation are replaced with hydrogen atoms to become chemically and physically stable resins. The aromatic oil component is changed to a stable aromatic oil component by adding a hydrogen atom to a double bond such as an olefin component in an unstable aromatic or highly aromatic aromatic compound. Further, the linear molecule forming a part of the aromatic component molecule is separated from the aromatic molecule by hydrogenation and is changed to a saturated hydrocarbon having a relatively small molecular weight. Saturated hydrocarbon oils, especially linear hydrocarbons having 7 or more carbon atoms, are all decomposed and removed. Therefore, the so-called wax content 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 of vacuum distillation is used as a raw material at a temperature of 440 ° C., a pressure of 19.25 MPa, and a pressure of 80.
Hydrogenation treatment under the conditions of% concentration hydrogen / fluidized alumina bed catalyst, temperature 365 ° C., pressure 4.14 kPa
Table 1 shows the quantitative changes that each component in the composition obtained as a residue of the advanced hydrogenolysis step undergoes during the above treatment when at least 50% by mass of light components are removed under the conditions of Table 1.
Shown in. The residual oil of vacuum distillation used as a raw material here corresponds to conventional asphalt.

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

[0019]

[Table 1]

Due to the changes in the components shown in Table 1, the residue in the advanced hydrogenolysis step after the treatment is changed from the physical properties of conventional asphalt. As a result, the physical properties of the asphalt composition of the present invention also differ from those of conventional asphalt. The features of the asphalt composition according to the inventions of claims 2 to 7 described below are mainly derived from the characteristics of the residue in the advanced hydrogenolysis step. Therefore,
In the asphalt composition of the present invention, the blending ratio of the residue in the advanced hydrogen decomposition step is 50% by mass or more, and more preferably 70% by mass, in order to utilize the characteristics of the residue in the advanced hydrogen decomposition step.
It is desirable to maintain the above.

[0021] As described in claim 2, the asphalt composition of the present invention has a kinematic viscosity of 200 at a temperature of 100 ° C.
˜2000 mm ² / s. Here, the measurement of kinematic viscosity is
According to the method specified in JIS K 2207 6.14. This kinematic viscosity range is lower than that of conventional asphalt. By lowering the viscosity as described above, the mixing temperature of the paving material, the curing temperature, and the compaction work temperature at the site can be kept low. Therefore, by lowering these temperatures in each step, energy saving in each step is realized. In addition, the degree of oxidative deterioration / heat deterioration of the asphalt itself that progresses during each step can be suppressed to a low level.

Further, as described in claim 3, the asphalt composition of the present invention has a resin content of 25% by mass or more, and contains a larger amount of resin content than conventional asphalt. Due to such properties, it is possible to reduce the amount of asphalt added when the mixture is mixed. This is because the resin component plays a central role in the asphalt as a binder that binds the aggregates together. In addition, the number of reuses of the mixture used for road paving 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 a regenerated oil containing a large amount of extremely harmful polycyclic aromatic aromatics, which has been conventionally used when regenerating a composite material.

Further, 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 during paving 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, it is possible to increase the degree of freedom of road pavement work around the residential area.

Further, as described in claim 5, the asphalt composition of the present invention has a nitrogen content of 0.2% by mass or less. With such properties, heat resistance and oxidation resistance can be further enhanced, and deterioration due to high temperature during mixing, curing and compaction of the composite material and deterioration over time due to long-term use as road surface material can be suppressed to a low level. be able to.

The invention of claim 6 solves the above-mentioned problems by a mixture containing the asphalt composition of any one of claims 1 to 5.

According to the present invention, it is possible to obtain a mixture containing the asphalt composition having the features of claims 1 to 5.

The invention according to claim 7 is the composite material according to claim 6, characterized in that the use is a water-permeable pavement. According to this invention, by using the composite material of claim 6 for water-permeable pavement, the characteristics of the asphalt composition of claims 1-5 can be utilized in the water-permeable pavement.

[0028]

The details of the present invention will be described below. In addition,
In the following description, the residual amount of advanced hydrogenolysis step is 100
%, That is, an asphalt composition in which a 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 manufacturing process is crude oil. The type of crude oil used in the present invention is not particularly limited, and any crude oil can be widely used. For example, a paraffinic Middle Eastern crude oil such as Arabian light, marban, or berry can be used. Also, Indonesian crude oil such as paraffin-rich Minas crude oil, Chinese crude oil such as Daqing crude oil, naphthene-based Venezuela or 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, the bottom 5 is further treated with the advanced hydrogenation treatment apparatus 3, and then the middle distillate (light fraction) 6 is removed. Bottom (residual)
It can be obtained as 7. On the other hand, 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 application, as the actual operating conditions, the vacuum distillation residue of crude oil was used at a temperature of 440 ° C. and a pressure of 1
It is most economical to carry out hydrogenation treatment under a fluidized alumina catalyst bed at an atmospheric hydrogen concentration of 80% under 9.25 MPa and further to remove light components under conditions of a temperature of 365 ° C. and a pressure of 4.14 kPa. The operation is carried out.

Table 2 shows the properties of the conventional asphalt and the asphalt composition according to the present invention (residual residue of advanced hydrogen decomposition step) in comparison. As conventional asphalt here,
According to JIS K 2207, Table 1 (Classification of straight asphalt / blown asphalt), straight asphalt 60-80 (penetration of 60 at 25 ° C)
It is representative of asphalt corresponding to the standard of more than 80 and less than 80), which has been treated with cafji crude oil.

[0032]

[Table 2]

As is clear from Table 2, the amount of asphaltene in the asphalt composition of the present invention is reduced to one third as compared with the conventional asphalt. Therefore, since molecules that are unstable with respect to changes such as oxidation are removed, asphalt having excellent heat resistance, oxidation resistance, and ultraviolet resistance can be obtained. Further, the asphaltene content inhibits the compatibility with the third component, but the asphalt composition of the present invention contains only one-third the amount of asphaltene content of the conventional asphalt. Therefore, it is possible to significantly shorten the mixing time when the functional asphalt is produced by blending the resin component and the rubber component for the purpose of extending the life, increasing the water permeability, and increasing the durability. Further, it is also said that the asphaltene content is harmful to the human body, and since the harmful asphaltene component of the present invention is changed to a resin content having high adhesiveness, it is less likely to become dust. Also, it is advantageous for environmental pollution when scattered.

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

For reference, the compounding ratios of the mixture when the asphalt composition of the present invention is used and when the conventional asphalt is used are shown in Table 3 as an example.

[0036]

[Table 3]

Further, when the asphalt composition of the present invention is used for water-permeable pavement, the compounding ratio in the mixture is smaller than that in the conventional asphalt, so that the porosity of the mixture can be increased and the water-permeable performance can be improved. Can be improved. Further, the compounding ratio of the third component such as resin or resin can be lowered, and the cost can be suppressed accordingly.

In general, as shown in FIG. 2, when the composite material 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 the conventional mixture material using asphalt is used for recycling, this usage limit is reached after two times of recycling (see point A in FIG. 2). On the other hand, when recycling a mixture using the asphalt composition of the present invention, 20
It is possible to recycle 4 times before the limit value of% is reached (see point B in FIG. 2).

Further, in the asphalt composition according to the present invention, the contents of sulfur and nitrogen are greatly reduced as compared with the conventional asphalt due to the 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, peeling phenomenon of aggregates, cracks, ruts, and the like.

Table 4 shows the thin film heating test method (JIS K 2
207 shows a comparison between the asphalt composition according to the invention according to 6.8) and conventional asphalt.

[0041]

[Table 4]

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

Penetration refers to the hardness of asphalt, and is the length of vertical penetration of a predetermined needle into a sample under specified conditions. Penetration is JIS K 2207 6.
The test method is specified in 3 and the measurement is specified to be performed at 25 ° C. However, the asphalt composition of the present invention has a large absolute penetration value (soft) and cannot be measured by the method specified in JIS. Therefore, the measurement temperature was intentionally set to 10 ° C. . Therefore, in Table 4, the test result is displayed by the penetration rate remaining rate so that the influence of the error due to the difference in the measurement temperature is reduced.

The asphalt composition of the present invention has a large penetration residual rate after any heating time. Asphalt has a low penetration due to deterioration due to heating. Therefore, it is clear that the asphalt composition of the present invention is less deteriorated by heating.

The thin film heating mass change evaluates the deterioration tendency of the thin film asphalt due to heating. That is, the asphalt coated on the surface of the aggregate in the mixture as a binder reproduces as a test the heat that it receives in each step of mixing, curing and compaction. Thin film heating mass change (%) measures the amount of mass change after heating the sample,
It is expressed as a percentage of the mass of the sample before heating. It can be seen that the asphalt composition of the present invention shows a slight change after any heating time, and shows little deterioration tendency by heating in a thin film form.

The elongation refers to the ductility of asphalt, and when the 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 it breaks is expressed in cm. Therefore, the elongation indicates the flexibility of asphalt with respect to temperature. The road surface is repeatedly expanded and contracted due to the temperature difference between day and night. When the repetition of expansion and contraction exceeds the limit, cracks or cracks occur. Therefore, the elongation is an index showing the temperature followability of asphalt. The high elongation at each temperature has good temperature followability, and as a result, the asphalt-mixed mixture material has high durability. Further, the elongation indicates one end of the degree of spreadability in which the asphalt in the mixture covers the surface of the aggregate as a binder. JIS K 2
207 Straight asphalt 60 in “Straight asphalt / blown asphalt quality” in Table 3
According to the quality standard of -80 (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
20 hours will be non-compliant with this standard. On the other hand, the asphalt composition according to the present invention meets 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 the elongation due to deterioration than conventional asphalt, and is an asphalt suitable for long-term use.

Further, as is clear from Table 2, the asphalt composition according to the present invention has the wax content removed, so that the aggregate is peeled off due to wax precipitation,
Generation of cracks and the like is prevented.

Further, the asphalt composition according to the present invention has lower kinematic viscosity at any temperature as compared with conventional asphalt (see Table 2 and FIG. 3). Normally, asphalt has a kinematic viscosity of 180 mm ² / s when mixed.
It is said that it must be heated until the temperature becomes below. When compacting the mixture as a road paving material at the road construction site, the asphalt has a kinematic viscosity of 300 mm ² / s.
It is said that it must be heated until the temperature becomes below.
(Edited by Japan Road Association, "Asphalt Pavement Guidelines" revised version 5th edition (issued November 18, 1993) 9th
See page 0. This is because the asphalt needs to be sufficiently permeated into the aggregate at the time of mixing the mixture and compaction, and for this reason, the kinematic viscosity of the asphalt needs to be lower than a predetermined value. As shown in Table 2, the asphalt composition according to the present invention has a compaction rate of 300 mm ² /
s, and the heating temperature for decreasing the viscosity to 180 mm ² / s when mixing the mixture is 3 compared to conventional asphalt.
Only 0 degrees C high is enough. Therefore, energy can be saved because the temperature is low. As described above, in order to heat the temperature of the asphalt to a predetermined temperature both during compaction and mixing of the mixture, it is necessary to heat the entire aggregate having a mass that is 15 times as high as that. Therefore, the enormous amount of energy saving can be realized by requiring the heating temperature to be slightly lower than 30 degrees Celsius.

By the way, asphalt magazine Vol. 40.
No. On page 20 of 195, Tamotsu Yoshinaka and Nobuyuki Nemoto disclose a trial calculation value of the relationship between the mixture temperature of the mixture and the carbon dioxide emission amount per ton of the mixture. According to this description, under the condition that the moisture content of the aggregate is 3% and the outside temperature is 30 ° C,
Heating temperature 150 degrees C (Kinematic viscosity of conventional asphalt 18
(Corresponding to the temperature at which the viscosity is reduced to 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 the temperature at which the asphalt composition of the present invention has a kinematic viscosity of 180 mm ² / s), it is generated along with the combustion of fuel oil required for heating. The amount of carbon dioxide generated is about 15.5 kilograms per ton of aggregate. Therefore, 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 energy saving of about 16% was realized.

Next, a result of trial calculation of energy comparison by the inventor of the present application will be shown. As described above, when the asphalt composition of the present invention is used, the amount of asphalt compounded in the mixture can be reduced, but here, the trial calculation was performed with the same compound as the conventional asphalt. Table 5 shows the trial calculation results for the conventional asphalt, and Table 6 shows the trial calculation results for the asphalt composition of the present invention. Here, the energy is indexed and compared by a dimensionless quantity.

[0051]

[Table 5]

[0052]

[Table 6]

As can be seen by comparing the heating energies per 100 parts of the mixture in the bottom columns of Tables 5 and 6, when 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 conventional asphalt is 3846, and it is shown that about 27% energy saving can be realized by using the asphalt composition of the present invention. .

Further, even in the heating at the time of compaction at the road construction site, the heating temperature can be suppressed to 30 ° C. or lower by using the asphalt composition of the present invention.
A similar energy saving effect is realized. Further, immediately after mixing the mixture, it is necessary to keep the mixture around the mixing temperature for curing. Even in this working step, the asphalt composition of the present invention can reduce the holding temperature, thereby realizing energy saving. be able to.

Further, since the mixing, curing and compacting steps are carried out at low temperatures, it is possible to obtain asphalt which is resistant to oxidative deterioration and thermal deterioration in combination with the low nitrogen content. .

Further, as shown in Table 2, the asphalt composition of the present invention has a lower Frass embrittlement point by 15 ° C than that of conventional asphalt. Here, the frass embrittlement point represents the flexibility of asphalt at low temperatures.
The initial temperature at which an asphalt thin film becomes brittle and cracks when the thin film of asphalt on a steel plate is cooled and bent under specified conditions. Therefore, the asphalt composition of the present invention can exhibit sufficient performance as a binder for aggregates even when used as a paving material for low temperature areas.

[0057]

INDUSTRIAL APPLICABILITY As described above, the asphalt composition of the present invention has a new application to the residue in the advanced hydrogenolysis step, which has conventionally been used only as a fuel oil.

Further, since the asphalt composition of the present invention has a low asphaltene content, it is possible to obtain an asphalt having excellent heat resistance, oxidation resistance and ultraviolet resistance.
Further, the asphalt composition of the present invention contains only one-third the amount of asphaltene content of conventional asphalt, therefore, resin content and rubber content for the purpose of long life, water permeability, high durability, etc. It is possible to greatly shorten the mixing time when blending to produce a functional asphalt. Further, since the asphalt composition of the present invention has a low content of harmful asphaltene component, it is advantageous for environmental pollution when it is scattered as dust.

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

Further, since the asphalt composition of the present invention contains a large amount of resin, it is possible to increase the number of times of recycling the mixture. In addition, when manufacturing functional asphalt,
The compounding ratio of the resin component and the rubber component can be lowered to contribute to cost reduction.

Further, since the asphalt composition of the present invention has a low sulfur content, it produces a very small amount of harmful hydrogen sulfide and sulfur compounds such as mercaptan during mixing of mixture materials and during paving work, and is safe. A work environment can be realized. In addition, since there is almost no generation of offensive odor due to these substances, it is also advantageous for road paving work in the vicinity of residential areas.

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

[Brief description of 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] Relationship between viscosity and temperature

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

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Claims (7)

(57) [Claims] 1. A vacuum distillation residue of crude oil is obtained at a temperature of 350 ° C. or higher, a pressure of 12.0 MPa or higher, and an atmospheric hydrogen concentration of 70-9.
An asphalt composition containing 0% and a residue obtained by hydrogenation treatment under a fluidized catalyst bed and further removing 50% by mass or more of light components under conditions of a temperature of 300 ° C. or higher and a pressure of 13.8 kPa or lower. 2. The kinematic viscosity at a temperature of 100 ° C. is 200.
It is -2000 mm < ² > / s and Claim 1 characterized by the above-mentioned.
The asphalt composition according to. 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 containing the asphalt composition according to claim 1. 7. The composite material according to claim 6, wherein the application is a water-permeable pavement.