JP3500129B2 - Asphalt composition and mixture - 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 and a mix which are preferably used for road paving and the like.

[0002]

2. Description of the Related Art The inventor of the present application is directed to Japanese Patent Application No. 2000-2522.
In the specification of No. 62, when the advanced hydrogen decomposition step residue is used for road paving material, it is possible to significantly reduce the mixing temperature at the time of manufacturing the composite material as compared with the case where conventional straight asphalt is used. It has been disclosed that various energy saving can be achieved, the content of a substance that causes toxicity and the like can be significantly reduced, and the number of times of recycling can be increased. Here, the "advanced hydrogen decomposition step residue" means a vacuum distillation residue of crude oil 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 a hydrogenation treatment under a fluidized catalyst bed. Further, it means the residue obtained by removing 50% by mass or more of light components under the conditions of a temperature of 300 ° C. or higher and a pressure of 13.8 kPa or lower.

A temperature of 350 ° C. or higher and a pressure of 12.0M
The step of hydrogenation treatment under Pa 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 300 ℃
As described above, the step of removing 50% by mass or more of the light components under the condition of the pressure of 13.8 kPa or less includes the intermediate fraction and the residue produced by decomposing a part of the vacuum distillation residue in the advanced hydrogenolysis step. This is the process of separating inspection.

Further, the straight asphalt is a bituminous substance obtained by subjecting crude oil to a distillation apparatus under atmospheric pressure / vacuum to remove light components.

[0005]

However, in the case of paving materials, when straight asphalt is replaced with the residual substance of the advanced hydrogen decomposition process, many merits described above are obtained, but there is a problem that road rubbing is severe. there were. This is because the kinematic viscosity of the residue in the advanced hydrogenolysis process at around room temperature is significantly lower than that of straight asphalt.

[0006] Therefore, the present invention also uses advanced hydrogenolysis step residue as road paving material, the less the tendency of rutting
And to provide a free asphalt composition and cause material.

[0007]

The present invention will be described below.

In one aspect of the present invention, the above problem is solved by an asphalt composition obtained by mixing 5 to 90 parts by weight of straight asphalt with 100 parts by weight of the residue in the advanced hydrogenolysis step.

According to this aspect, the kinematic viscosity at high temperature of the asphalt composition in which the residue of the advanced hydrogenolysis step and straight asphalt are mixed in a predetermined range is close to the kinematic viscosity of the residue of the advanced hydrogenolysis step, and At low temperatures, the kinematic viscosity of straight asphalt rapidly approaches. Therefore, since the kinematic viscosity of the mixture at a high temperature is low, it is possible to enjoy the advantage of energy saving as in the case of using the residue of the advanced hydrogenolysis step alone. In addition, since the kinematic viscosity of the mixture increases to near the kinematic viscosity of straight asphalt at around room temperature, it is possible to solve the problem of rubbing, which is a problem when the advanced hydrogenation step residue is used alone.

In this embodiment, 2 to 20 parts by weight of solvent extract may be mixed with 100 parts by weight of the asphalt composition.

Here, the solvent extract means the ore.
For solvent extraction process, which is one of the processes for refining oil-based lubricating oil
Aromatic Extracted from Solvent Oil by Vacuum Distillation
A component rich in hydrocarbons.

In this way, the compatibility of the asphalt composition with rubber and resin can be enhanced.

In this embodiment, 3 to 30 parts by weight of petroleum resin may be mixed with 100 parts by weight of the asphalt composition. Further, in this embodiment, 3 to 30 parts by weight of rubber may be mixed with 100 parts by weight of the asphalt composition. Furthermore, in this embodiment, 3 parts by weight relative to 100 parts by weight of the asphalt composition.
It is also possible to mix up to 30 parts by weight of the thermoplastic rubber.

Petroleum resin as used herein refers to a group of polymers produced from mixed unsaturated monomers obtained from a petroleum processing process fraction. Further, the rubber here is a high polymer obtained by natural, synthetic or modified, and has elasticity, post-vulcanization property and elastic recovery property. In addition, the thermoplastic rubber here is
A polymer that can be processed in the same manner as a thermoplastic material, but retains properties similar to ordinary vulcanized rubber.

In this way, the void ratio of the composite material can be increased by the action of the rubber / resin or the thermoplastic rubber.
An asphalt composition suitable for use in water-permeable pavement can be provided. The term "composite material" as used herein refers to a material that is used for the purpose of road paving by mixing asphalt or an asphalt composition with an aggregate such as gravel at a predetermined ratio (hereinafter the same).

[0016] In another aspect of the present invention, the above problem is solved by a mixture containing the asphalt composition of the above aspects.

According to this aspect, the asphalt composition having the above-mentioned various properties can be applied to a road pavement mixture.

The operation and the advantage of the present invention will be apparent from the embodiments described below.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on embodiments. First, the case where the advanced hydrogenolysis step residue and straight asphalt are mixed will be described, and then the case where the advanced hydrogenolysis step residue and the solvent extract are mixed will be described.

[0020]

[Examples] Table 1 and FIG.
The measurement result of the kinematic viscosity of the asphalt composition obtained by mixing 30 parts by weight of straight asphalt with 30 parts by weight with respect to 00 parts by weight (hereinafter referred to as "mixture 1") is shown as a residue in the advanced hydrogenolysis step. It is shown in comparison with a single body and a straight asphalt single body. FIG. 1 shows the measurement results of these kinematic viscosities in the temperature range of 60 to 200 ° C.
The results of measuring the kinematic viscosity in the temperature range of up to 100 ° C. are shown in comparison with each other. The measurement of kinematic viscosity here was performed according to the test method defined in JIS K 2207 6.14.

[0021]

[Table 1]

Generally, when two types of petroleum products having different kinematic viscosities are mixed, the kinematic viscosity of the mixture tends to be more greatly influenced by the product having a lower viscosity. For example, when a product C having a kinematic viscosity of 20 mm ² / s at a certain temperature and a product B having a kinematic viscosity of 40 mm ² / s are mixed in equal amounts, the kinematic viscosity of the product C is The arithmetic mean value of both kinematic viscosities is not 30 mm ² / s, but takes an intermediate value between 30 and 20. Basically, the same tendency is obtained when the residue of the advanced hydrogenolysis step, which has low viscosity, and the straight asphalt with high viscosity are mixed. That is, as can be read from FIG. 1 and Table 1, the kinematic viscosity of the mixture 1 is close to the kinematic viscosity of the residue of the advanced hydrogenolysis step having a low viscosity. This tendency is especially 1
It is very clearly recognized in the temperature range of 50 ° C or higher.
Therefore, at the blending working temperature of the mixture, the curing temperature, and the reheating temperature at the pavement site, the mixture 1 has a kinematic viscosity close to that of the advanced hydrogenolysis step residue. In other words, the blending working temperature, the curing temperature, and the reheating temperature at the pavement site of the mixture using the mixture 1 can be lowered as compared with the case where the straight asphalt is used. Therefore, the energy saving property of the residue of the advanced hydrogenolysis step can be enjoyed even when the mixture 1 is used.

On the other hand, the kinematic viscosity of the mixture 1 gradually approaches the kinematic viscosity of straight asphalt in the region of 100 ° C. or lower as the temperature decreases. Therefore, once the blended mixture is used as a constituent material of the pavement surface, the ambient temperature is 100 ° C. or less, so that the mixture 1 can maintain a high viscosity close to that of straight asphalt, and so-called rut occurrence occurs. Can be prevented.

The mechanism by which the kinematic viscosity of the mixture 1 rapidly approaches the kinematic viscosity of straight asphalt at 100 ° C. or lower is considered as follows. Mixture 1
When the temperature is higher than 200 ° C., the asphaltene contained in the straight asphalt expands, and the binding of the asphaltene micelles is loosened. Oil and a relatively low molecular weight resin, which are abundantly contained in the residue of the advanced hydrogenolysis process, penetrate into these micelles. The asphaltene that has been infiltrated takes in the oil component and the low-molecular-weight resin component when the temperature decreases. However, since it is surrounded by oil, it cannot return to the micelle. That is, it cannot return to asphaltene and is dispersed as a large resin component. When the temperature is further lowered, the large resin component becomes a resin having high flexibility, and the cohesive force is increased. 10 in this way
In the low temperature range of 0 ° C. or lower, the kinematic viscosity of the mixture 1 rapidly increases as the temperature decreases.

As described above, from the viewpoint of keeping the kinematic viscosity high in the low temperature range, the mixing ratio of the straight asphalt is 5 parts by weight or more, preferably 15 parts by weight or more based on 100 parts by weight of the residue in the advanced hydrogenolysis step. , And more preferably 30 parts by weight or more. On the other hand, if the mixing ratio of the straight asphalt is too high, the viscosity in the high temperature range will increase, and the original energy saving property of the advanced hydrogenolysis step residue will be lost. From this viewpoint, the upper limit of the mixing ratio of straight asphalt is 1
90 parts by weight or less, preferably 70 parts by weight or less, and more preferably 60 parts by weight or less based on 00 parts by weight.

Next, regarding the three components of the advanced hydrogenolysis step residue, mixture 1 and straight asphalt, the minimum workable temperature (the temperature at which the kinematic viscosity is about 250 to 320 mm ² / s) and the predetermined type of polymer are acceptable. Table 2 shows a comparison of melting temperatures (test results). Here, the polymer-soluble temperature means the residue of the advanced hydrogenolysis step, the mixture 1, or the residue of the advanced hydrogenolysis step, the mixture 1, when the solid polymer is introduced into the straight asphalt.
Alternatively, it refers to a temperature at which solids are no longer recognized due to dissolution of a polymer in straight asphalt.

[0027]

[Table 2]

As is clear from Table 2, the minimum workable temperature of the mixture 1 is close to the working temperature of the residual residue of the advanced hydrogenolysis step, and significant energy saving is possible as compared with the case where conventional straight asphalt is used. Is. It was also confirmed that the temperature required to dissolve the polymer, which is necessary when adjusting the water-permeable pavement material, is low, and energy saving can be realized in this respect.

Table 3 shows the results of the solubility test of the residue of the advanced hydrogenolysis process and the mixture of the solvent extract with various resins and rubbers in comparison with the advanced hydrogenolysis process residue alone and the straight asphalt alone. ing. In the table, “Mixture 2” is the residual residue of advanced hydrogenolysis step 100
5 parts by weight of solvent extract was mixed with 10 parts by weight, and "Mixture 3" was the residue of advanced hydrogenolysis step 100.
It shows the mixture of 100 parts by weight of the solvent extract with respect to each part. In the table, "PP" is polypropylene, "PE" is polyethylene, "PS" is polystyrene, "EP" is ethylene propylene rubber, "EPT" is ethylene propylene terpolymer rubber, "NR" is natural rubber, and "BR" is Butadiene rubber, "SBR" is styrene butadiene rubber, "TPO" is olefinic thermoplastic rubber, "T
"PS" indicates styrene thermoplastic rubber.

[0030]

[Table 3]

As is clear from Table 3, the residue from the advanced hydrogenolysis step is originally superior in compatibility with various rubbers and resins when compared with straight asphalt, but it is further improved by mixing solvent extract. The solubility can be increased. As an asphalt used for water-permeable pavement, it is usually necessary to mix at least 20 parts by weight of these rubbers and resins with the asphalt, but by mixing a solvent extract with the residue of the advanced hydrogenolysis step. Since the compatibility is even better,
It is possible to broaden the selection range of rubber and resin to be melted. Thereby, the material cost can be reduced. Also, since the compatibility increases, the mixing temperature can be lowered,
It can also contribute to energy saving. As an example of the above solvent extract, "Fuccol Aromax series" (Fuccol is a registered trademark) manufactured by Fuji Kosan Co., Ltd. is available in the city.

FIG. 2 shows the relationship between the temperature and the kinematic viscosity of the mixture 3 in which 100 parts by weight of the solvent extract was mixed with 100 parts by weight of the residue of the advanced hydrogenolysis process. It is shown in contrast to. Generally, the kinematic viscosity of the solvent extract is lower than the kinematic viscosity of the residue of the advanced hydrogenolysis step, and when both are mixed as described above, the kinematic viscosity of the mixture is close to the kinematic viscosity of the solvent extract, which has a low viscosity. Will be things. Therefore, in order to maintain the kinematic viscosity of the mixture at a predetermined value or more, the mixing ratio of the solvent extract is generally 20 parts by weight or less, preferably 10 parts by weight or less, more preferably 100 parts by weight of the residue in the advanced hydrogenolysis step. Is preferably 2 parts by weight or less.

In place of the solvent extract, the tar fraction (FCC tar) produced by the catalytic cracking unit or the gas fraction (VG produced by the vacuum distillation unit)
The same effect can be obtained by mixing O-VACUUMED GAS OIL).

The present invention may be mixed with simple straight astigmatism Fal bets a predetermined amount of high hydrocracking process residue,
Further, the straight asphalt and the solvent extract may be mixed at the same time. Further, in order to impart water permeability, a predetermined amount of rubber or resin may be mixed therewith. Further, in the above embodiments, the description has been made mainly for road paving, but the use of the asphalt composition of the present invention is not limited to this, and “for waterproofing” and “for sealing”
It can also be applied to applications such as "for rust preventive paint", "for ink paint" and "for soundproofing". Furthermore, since the asphalt composition of the present invention has good compatibility with plastics, it can dissolve combustible waste (plastic waste) and can use it for paving materials, so it can also be applied to waste treatment. Is.

Incidentally, it is estimated that the domestic demand for water-permeable asphalt will exceed 1 million tons in 2005, and by implementing the present invention, it is possible to treat 200,000 tons of plastic waste per year.

In the present invention, when the straight hydrogen asphalt or solvent extract is mixed with the residue of the advanced hydrogen decomposition step, the residue of the advanced hydrogen decomposition step kept at a predetermined high temperature and the straight asphalt or the solvent extract are stored in the tank. It can be blended uniformly by thoroughly stirring with. Alternatively, the advanced hydrogenolysis step residue heated to a predetermined temperature and the straight asphalt or the solvent extract may be mixed by so-called line blending in which they are blended while being supplied to the same line.

While the present invention has been described above in connection with the presently most practicable and preferred embodiments, the present invention is limited to the embodiments disclosed herein. It is not intended that the invention be modified without departing from the scope and spirit of the invention that can be read from the claims and the entire specification, and the asphalt composition and the mixture with such modifications are also technically possible in the present invention. It must be understood to be within the scope.

[0038]

As described above, in one embodiment of the present invention, 5 to 100 parts by weight of the residue in the advanced hydrogenolysis step is used.
According to the asphalt composition obtained by mixing 90 parts by weight of straight asphalt, the kinematic viscosity of the asphalt composition obtained by mixing the residue of the advanced hydrogen decomposition step and the straight asphalt at a mixing ratio within a predetermined range has a high kinematic viscosity at the high temperature The kinematic viscosity is close to that of the asphalt, and conversely, when the temperature is low, the kinematic viscosity of the straight asphalt rapidly approaches. Therefore,
Since the kinematic viscosity of the mixture at a high temperature is low, it is possible to enjoy the advantage of energy saving as in the case of using the advanced hydrogenolysis process residue alone. Further, since the kinematic viscosity of the mixture increases to near the kinematic viscosity of straight asphalt at around room temperature, it is possible to solve the problem of rubbing, which is a problem when the advanced hydrogenation step residue is used alone.

In this embodiment, by mixing 2 to 20 parts by weight of the solvent extract with 100 parts by weight of the asphalt composition, the compatibility of the asphalt composition with rubber or resin can be enhanced.

In this embodiment, 3 to 30 parts by weight of petroleum resin may be mixed with 100 parts by weight of the asphalt composition. Further, in this embodiment, 3 to 30 parts by weight of rubber may be mixed with 100 parts by weight of the asphalt composition. 3 to 30 parts by weight of the thermoplastic rubber may be mixed with 100 parts by weight of the asphalt composition.

In this way, the porosity of the mixture can be increased by the action of rubber or resin, and an asphalt composition that can be publicly used for water-permeable pavement can be provided.

[0042] According to the above Kitai-like mixed material of asphalt composition is mixed, the asphalt composition having the above characteristics can be applied to the mixed material for road paving.

[Brief description of drawings]

FIG. 1 is a diagram showing the relationship between the kinematic viscosity and temperature of a mixture of advanced hydrogenolysis step residue and straight asphalt.

FIG. 2 is a diagram showing a relationship between kinematic viscosity and temperature of a mixture of advanced hydrogenolysis step residue and solvent extract.

Claims (6)

(57) [Claims] 1. A pavement asphalt composition in which 5 to 90 parts by weight of straight asphalt is mixed with 100 parts by weight of the residue in the advanced hydrogenolysis step. 2. The asphalt composition for pavement 1 according to claim 1.
An asphalt composition in which 2 to 20 parts by weight of solvent extract are mixed with 00 parts by weight. 3. An asphalt composition obtained by mixing 3 to 30 parts by weight of a petroleum resin with 100 parts by weight of the asphalt composition according to claim 1. 4. An asphalt composition obtained by mixing 3 to 30 parts by weight of rubber with 100 parts by weight of the asphalt composition according to claim 1. 5. An asphalt composition obtained by mixing 3 to 30 parts by weight of a thermoplastic rubber with 100 parts by weight of the asphalt composition according to claim 1. 6. The asphalt according to claim 1.
A mixture in which the composition is mixed.