JPH1160961A - Asphalt composition, mixture and paved body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an asphalt composition which gives excellent Cantabor loss rate, to obtain a composition which has a high mechanical strength and a high low-temperature viscosity, and is excellent in stability of the composition, and whose mixture has excellent workability and excellent Cantabor loss rate, to obtain a mixture using the composition, and to obtain a paved body. SOLUTION: These asphalt composition, an asphalt mixture using the composition and a paved body are obtained by compounding asphalt with (A) a polymer modifier selected from a natural rubber, a styrene-butadiene randam copolymer, a polychloroprene, a polybutadiene, an acrylonitrile-butadiene copolymer, an olefin polymer, a urethane polymer, a polyester polymer, an ethylene-vinyl acetate copolymer, an ethylene-ethyl acrylate copolymer, a styrene-butadiene block copolymer, a styrene isoprene block copolymer, an acrylic polymer and a styrene polymer and (B) an oil-gelling agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an open-grain mixture which is used as a pavement on roadways, especially on roads with heavy vehicle traffic, airport runways, sidewalks, parks and the like, and also as a kind of roadway / sidewalk pavement. The present invention relates to an asphalt composition used for producing a pavement material for a water-permeable pavement or a drainage pavement.

[0002]

2. Description of the Related Art Currently, straight asphalt is mainly used as a road pavement material. However, due to an increase in traffic volume and heavy vehicle traffic, the road surface temperature rises in the summer at intersections and heavy vehicle traffic areas. It has been pointed out that there is a problem that the road surface undulates due to rutting, and that a pavement body is worn by a tire chain or the like in a snowy cold region.

[0003] Conventionally, in order to solve these problems, by adding a high-molecular weight rubber or resin as an asphalt modifier, the temperature sensitivity of asphalt is improved, and the adhesion to aggregate is improved. It is known that the performance of asphalt as a binder for paving can be improved by imparting flexibility at low temperatures and the like.

[0004] In order to increase the slip resistance of the pavement,
In addition, in order to prevent water splashing from cars and to prevent the hydroplaning phenomenon that occurs when cars are running at high speeds in rainy weather, the open particle size mixture is also used for the purpose of increasing the number of passing vehicles and reducing noise due to speeding up. Permeable pavement using
Alternatively, drainage pavement has been widely adopted in recent years. In this kind of permeable pavement or drainage pavement, mechanical strength such as higher toughness and tenacity, higher viscosity at low temperature (for example, 60 ° C.), that is, high viscosity at low temperature (for example, 60 ° C.), It is necessary to improve the cantaburo loss rate, which is an index of stone skipping, and methods of increasing the molecular weight of the modifier and increasing the amount of the modifier have been tried, but on the other hand, the melt viscosity at high temperatures increases, Workability is significantly impaired. As a means for solving these problems, block copolymers such as styrene-butadiene block copolymer and styrene-isoprene block copolymer have been mainly studied, and are currently the mainstream of asphalt compositions, but their solubility in asphalt is limited. Yes, the addition of a large amount deteriorates the stability of the composition.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the conventional asphalt composition, and has high mechanical strength, high low-temperature (60 ° C.) viscosity, good stability as a composition, It is a further object of the present invention to provide a highly balanced asphalt composition in which the mixture has good workability and a loss rate of cantabulo.

[0006]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, an asphalt composition containing a specific polymer modifier and an oil gelling agent has been obtained.
High mechanical strength (specifically toughness, tenacity) and low temperature (60 ° C) viscosity, good stability as a composition, low melt viscosity at high temperature, and asphalt mixture using the composition It has been found that the properties are good and the cantablo loss rate can be suppressed to a low level, and the present invention has been completed. The present invention relates to asphalt, (A)
Natural rubber (NR), styrene-butadiene random copolymer (SBR), polychloroprene (CR), polybutadiene (BR), acrylonitrile butadiene copolymer (NBR), olefin polymer (PO), urethane polymer ( PU), polyester polymers (PEs), ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), styrene-butadiene block copolymer (SBS), styrene-isoprene block copolymer 1 selected from coalesced (SIS), acrylic polymer (Ac) and styrenic polymer (PS)
An asphalt composition comprising one or more polymer modifiers and (B) an oil gelling agent. Also, the present invention provides the asphalt with (A) the above-mentioned specific polymer modifier in an amount of 1 to 20% by weight based on the total amount of the composition,
(B) An asphalt composition containing 0.1 to 5% by weight of an oil gelling agent based on the total amount of the composition.

Hereinafter, the contents of the present invention will be described in detail. As asphalt in the present invention, any asphalt such as natural asphalt, petroleum asphalt, or a mixed asphalt thereof can be used. Examples of the natural asphalt include Gilsonite, Grahamalite, Trinidad Lake Asphalt, and the like. Examples of petroleum asphalt include straight asphalt of various penetration grades obtained by distillation of crude oil, blown asphalt or semi-blown asphalt produced by blowing air in the presence or absence of a catalyst, and asphalt materials. Solvent-removed asphalt generated when separating asphalt from a contained fraction with a solvent such as propane or n-butane can be exemplified. These petroleum asphalts can be used as a mixture of two or more.

[0008] The natural and petroleum asphalts exemplified above are asphalts generally known for road paving. The most preferred asphalt of the present invention is straight asphalt, particularly at 25 ° C.
Those having a penetration of 20 to 150, preferably 40 to 120 are preferred. The proportion of asphalt in the composition of the present invention is not particularly limited, but usually,
75 to 98.9% by weight, preferably 8%, based on the total amount of the composition
0 to 97.8% by weight.

In the present invention, (A) the polymer modifier is natural rubber (NR), styrene-butadiene random copolymer (SBR), polychloroprene (CR), polybutadiene (BR), acrylonitrile butadiene copolymer ( NBR), olefin-based polymer (PO), urethane-based polymer (PU), polyester-based polymer (PEs), ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), styrene 1 selected from butadiene block copolymer (SBS), styrene-isoprene block copolymer (SIS), acrylic polymer (Ac) and styrene polymer (PS)
It consists of species or two or more species.

Although the proportion of the high molecular weight modifier in the composition of the present invention is not particularly limited, it is usually preferably 1 to 20% by weight, particularly preferably 2 to 20% by weight based on the total amount of the composition.
１８18% by weight. If it is less than 1% by weight, the mechanical strength, specifically, toughness and tenacity will be low, and
If the ratio exceeds the above range, the stability of the composition becomes poor and the melt viscosity at a high temperature tends to increase.

The oil gelling agent in the present invention includes:
1,3: 2,4 dibenzylidene sorbitol, 1,3:
2,4-dibenzylidene xylitol, 12-hydroxystearic acid, N-lauroyl-L-glutamic acid-
one selected from α, γ-bis-n-butylamide, spin-labeled steroid, cholesterol derivative, aluminum dialkylphosphate, phenolic cyclic oligomer, 2,3-bis-n-hexadecyloxyanthracene, cyclic depsipeptide and the like Alternatively, two or more low molecular organic oil gelling agents can be used.

Although the ratio of the oil gelling agent in the composition of the present invention is not particularly limited, it is usually preferably 0.1 to 5% by weight, particularly preferably 0.2 to 4% by weight based on the total amount of the composition. %. If it is less than 0.1% by weight, the gelling effect tends to be small, the viscosity at low temperature (60 ° C.) tends to be low, and the cantablo loss rate tends to be high. If the content exceeds 5% by weight, not only the viscosity at low temperature (60 ° C.) but also the melt viscosity at high temperature increases, the workability decreases, the composition becomes hard, and as a result, the phenomenon that tuftena decreases on the contrary also occurs. I do.

In addition to the above substances, the asphalt composition of the present invention may optionally contain various additives conventionally used in asphalt compositions, such as silica, talc, calcium carbonate, various minerals, and fibrous and powdery materials such as glass. Fillers, reinforcements, mineral aggregates, pigments or softeners such as paraffinic, naphthenic and aroma-based process oils, coumarone indene resin, terpene resin, petroleum resin, rubber powder, anti-peeling agent, anti-freeze An agent or the like may be added within a range that does not impair the effects of the present invention.

Further, the asphalt mixture of the present invention is:
The above asphalt composition and aggregate, specifically, Nos. 5 and 6
No. 7, No. 7, etc. consist of single-grained crushed stones, coarse sand, fine sand, natural aggregates such as screenings, and artificial aggregates, and their composition ratios fulfill the function of the structure as roads and passages. If there is, it does not matter.

When the asphalt composition of the present invention is used for pavement on a road, the preparation method is not particularly limited, and a stirring type heating melting vessel, a roll, a kneader,
After preparing the composition with a Banbury mixer, extruder, etc.,
A method of mixing various kinds of heated aggregate mixtures and fillers in a mixer of an asphalt plant (so-called premix binder), and a method of adding and mixing each component of the composition together with asphalt in a mixer of an asphalt plant (so-called plant mix binder) Method).

[0016]

EXAMPLES The present invention will be specifically described below with reference to examples, but these examples do not limit the present invention.
In the following description, parts and percentages are shown on a weight basis. In the table, the polymer modifier is abbreviated as follows. CR: polychloroprene (trade name: Hardway II,
SBR: Styrene-butadiene random copolymer (trade name: Rodex, manufactured by Nippon Synthetic Rubber Co., Ltd.) SBS: Styrene-butadiene block copolymer (trade name: Tufprene 315, Asahi Kasei) SIS: Styrene-isoprene block copolymer Polymers (Califlex TR-1107, manufactured by Shell) PEs: Polyester-based polymer (Vylonal M)
D1100, manufactured by Toyobo) PO: Olefin polymer (trade name: Chemipearl S-10)
0: manufactured by Mitsui Petrochemical) PU: urethane-based polymer (trade name: Iizelux, manufactured by Hodogaya Chemical) Ac: acrylic polymer (trade name: Polytron T-27)
6, Asahi Kasei) PS: Styrene-based polymer (trade name Pegal LL-502)
0, made of high pressure gas)

Measurement of physical properties of asphalt composition; toughness and tenacity test: Toughness and tenacity test method described in “Handbook of Pavement Test Methods (Japan Road Association)” (J
EAAS compliant). Melt viscosity: measured at 200 ° C. with a Brookfield viscometer. Low temperature viscosity: Measured by a 60 ° C. viscosity test method described in “Pavement Test Method Handbook (Japan Road Association)”. Binder stability (storage stability): About 100 g of asphalt composition was placed in a tube having an inner diameter of about 30 mm, and
After standing at 50 ° C. for 24 hours, sampling was performed separately for the upper layer and the lower layer, and the penetration was measured. The difference in the penetration was used as a measure of layer separation, and judged based on the following criteria. A (Good stability): Penetration difference between upper layer and lower layer is less than 10 B (Stability is somewhat poor): Penetration difference between upper layer and lower layer is 10 or more and less than 15 C (poor stability): Penetration between upper layer and lower layer Difference of 15 or more

Measurement of physical properties of asphalt mixture; Cantablo loss rate: No. 6 crushed stone from Himekawa, Niigata Prefecture, coarse sand,
After preparing a mixture with a porosity of about 20% using stone powder from Aomi Town, Niigata Prefecture, the Japan Highway Public Corporation standard Kantaburo test method (JHS
231-1992).

Examples 1-12 Asphalt composition test;
According to the formulations shown in Tables 1 and 2, chloroprene (CR) polymer modifier was added as a chloroprene (CR) polymer modifier to a straight asphalt 60-80 manufactured by Showa Shell Co., Ltd. under heating and melting at 180 ° C. DENKA HARDWAY II manufactured by Nippon Rika Co., Ltd. as an oil gelling agent (1,3: 2,4 dibenzylidene sorbitol)
Were sequentially added and melt-mixed. In Tables 1 to 5, the amount of the chloroprene (CR) -based polymer modifier was indicated by the solid content. After the complete melting and mixing, curing and defoaming were further performed for about 10 minutes to obtain evaluation samples. The resulting asphalt composition has high toughness, tenacity, 200,000 poise
It has a viscosity of 60 ° C. and a low viscosity of 200 ° C. as described above, and there is no problem in stability as a composition.

Asphalt mixture test; No. 6 crushed stone / coarse sand / stone powder = 82.0 / 13.0 / 5.0 Aggregate in a predetermined amount, heated to about 200 ° C., and then adjusted to 190 ° C. After mixing for 30 seconds with a 30 kg mixer manufactured by Yato Kikai Kogyo Co., Ltd., an amount of straight equivalent to the amount of binder (straight asphalt + polymer modifier + oil gelling agent) is 5% with respect to the aggregate. Add asphalt for 1 minute, add polymer modifier and oil gelling agent from the composition shown in Tables 1 and 2 and mix for 3 minutes, place in a prescribed mold and squeeze, porosity about 20% Was prepared. Each of the test pieces had a low cantaburo loss rate and was good. The amount of the binder to be added to the aggregate was determined from the optimum amount of the binder according to the Japan Highway Public Corporation Standard JHS232 “Adhesion test method for drainage asphalt mixture”.

Both the physical properties of the composition and the physical properties of the mixture were excellent, and it was confirmed that the asphalt composition and the mixture were highly balanced.

Examples 13 to 20 Asphalt composition test;
Various polymers listed in Table 2 as polymer modifiers were added to a straight asphalt 60-80 manufactured by Showa Shell Co., Ltd. under stirring and heated and melted at 0 ° C., and Gelol manufactured by Nippon Rika Co., Ltd. was used as an oil gelling agent. A predetermined amount of D is sequentially added,
Melt mixed. After the complete melting and mixing, curing and defoaming were further performed for about 10 minutes to obtain evaluation samples. The asphalt composition obtained had high toughness, tenacity, a viscosity of 60 ° C. of 200,000 poise or more, and a low viscosity of 200 ° C., and there was no problem with the stability of the composition.

Asphalt mixture test: No. 6 crushed stone / coarse sand / stone powder = 82.0 / 13.0 / 5.0 A predetermined amount of crushed stone was heated to about 200 ° C., and then Yato was heated to 190 ° C. After mixing for 30 seconds with a 30 kg mixer manufactured by Kikai Kogyo Co., Ltd., the amount of straight asphalt corresponding to the amount of the binder (straight asphalt + polymer modifier + oil gelling agent) to the aggregate is 5%. For 1 minute, the polymer modifier and the oil gelling agent are added from the composition shown in Table 2 and mixed for 3 minutes. The mixture is placed in a predetermined mold and compacted to obtain a specimen having a porosity of about 20%. Produced. Each of the test pieces had a low cantaburo loss rate and was good.

It was confirmed that both the composition properties and the mixture properties were excellent, and the asphalt composition and the mixture were highly balanced.

Examples 21 to 22 Asphalt composition test;
As a styrene-butadiene random copolymer (SBR) -based polymer modifier, ROdex manufactured by Nippon Synthetic Rubber Co., Ltd. was added to a stirred asphalt 60-80 manufactured by Showa Shell Co., Ltd., which was heated and melted at 0 ° C. A predetermined amount of gelol D manufactured by Shin-Nippon Rika Co., Ltd. as an oil gelling agent,
Sequentially added and melt mixed. After the complete melting and mixing, curing and defoaming were further performed for about 10 minutes to obtain evaluation samples. The asphalt composition obtained had high toughness, tenacity, a viscosity of 60 ° C. of 200,000 poise or more, and a low viscosity of 200 ° C., and there was no problem with the stability of the composition.

Asphalt mixture test: No. 6 crushed stone / coarse sand / stone powder = 82.0 / 13.0 / 5.0 A predetermined amount of crushed stone, heated to about 200 ° C., and then temperature-controlled to 190 ° C. After mixing for 30 seconds with a 30 kg mixer manufactured by Kikai Kogyo Co., Ltd., the amount of straight asphalt corresponding to the amount of the binder (straight asphalt + polymer modifier + oil gelling agent) to the aggregate is 5%. For 1 minute, the polymer modifier and the oil gelling agent are added from the composition shown in Table 2 and mixed for 3 minutes. The mixture is placed in a predetermined mold and compacted to obtain a specimen having a porosity of about 20%. Produced. Each of the test pieces had a low cantaburo loss rate and was good.

Both the physical properties of the composition and the mixture were excellent, and it was confirmed that the asphalt composition and the mixture were highly balanced.

Examples 23 to 24 Asphalt composition test;
As a chloroprene (CR) -based polymer modifier, Denka Hardway II type manufactured by Denki Kagaku Kogyo Co., Ltd. was added to a straight asphalt 60-80 manufactured by Showa Shell Co., Ltd. , A predetermined amount of 12-hydroxystearic acid was sequentially added and melt-mixed.
After complete melting and mixing, the sample was cured and defoamed for about 10 minutes to obtain an evaluation sample. The resulting asphalt composition has high toughness, tenacity, viscosity of more than 200,000 poise at 60 ° C.,
It had a low viscosity at 200 ° C., and there was no problem with the stability of the composition.

Asphalt mixture test: No. 6 crushed stone / coarse sand / stone powder = 82.0 / 13.0 / 5.0 A predetermined amount of crushed stone was heated to about 200 ° C. and then heated to 190 ° C. Tanito. After mixing for 30 seconds with a 30 kg mixer manufactured by Kikai Kogyo Co., Ltd., the amount of straight asphalt corresponding to the amount of the binder (straight asphalt + polymer modifier + oil gelling agent) to the aggregate is 5%. For 1 minute, the polymer modifier and the oil gelling agent from the composition shown in Table 3 are added and mixed for 3 minutes, and placed in a predetermined mold and squeezed to obtain a specimen having a porosity of about 20%. Produced. Each of the test pieces had a low cantaburo loss rate and was good.

Both the composition properties and the mixture properties were excellent, and it was confirmed that the asphalt composition and the mixture were highly balanced.

Examples 25-29 Asphalt composition test;
A chloroprene (CR) modifier as a polymer modifier is added to a straight asphalt 40-60 or 80-100 manufactured by Showa Shell Co., Ltd. under stirring and heated and melted by Denka Denki Co., Ltd. Hardway II type or styrene-butadiene block copolymer (SBS) -based modifier: Tufpren 315 manufactured by Asahi Kasei Kogyo Co., Ltd., and Gelol D manufactured by Shin-Nippon Rika Co., Ltd. as an oil gelling agent
Alternatively, a predetermined amount of 12-hydroxystearic acid was successively added and melt-mixed. After complete melting and mixing, the sample was cured and defoamed for about 10 minutes to obtain an evaluation sample. The resulting asphalt composition has high toughness, tenacity, 200,000 poise
It has a viscosity of 60 ° C. and a low viscosity of 200 ° C. as described above, and there is no problem in stability as a composition.

Asphalt mixture test: No. 6 crushed stone / coarse sand / stone powder = 82.0 / 13.0 / 5.0 A predetermined amount of crushed stone, heated to about 200 ° C., and then adjusted to 190 ° C. After mixing for 30 seconds with a 30 kg mixer manufactured by Kikai Kogyo Co., Ltd., the amount of straight asphalt corresponding to the amount of the binder (straight asphalt + polymer modifier + oil gelling agent) to the aggregate is 5%. For 1 minute, the polymer modifier and the oil gelling agent from the composition shown in Table 3 are added and mixed for 3 minutes, and placed in a predetermined mold and squeezed to obtain a specimen having a porosity of about 20%. Produced. Each of the test pieces had a low cantaburo loss rate and was good.

Both the composition properties and the mixture properties were excellent, and it was confirmed that the asphalt composition and the mixture were highly balanced.

Examples 30 to 33 Asphalt composition test;
A chloroprene (CR) modifier as a polymer modifier is added to a straight asphalt 60-80 manufactured by Showa Shell Co., Ltd. under stirring and heated and melted by Denka Hardway II type manufactured by Denki Kagaku Kogyo KK Alternatively, a styrene-butadiene block copolymer (SBS) -based modifier: Toughprene 315 manufactured by Asahi Kasei Kogyo Co., Ltd. or Rodex manufactured by Nippon Synthetic Rubber Co., Ltd. as a styrene-butadiene random copolymer (SBR) -based polymer modifier. As an oil gelling agent, Nippon Rika Co., Ltd. Gel All D, 12-
A predetermined amount of hydroxystearic acid or 1,3: 2,4 dibenzylidene xylitol was sequentially added in the composition shown in Table 3, and melt-mixed. After complete melting and mixing, the sample was cured and defoamed for about 10 minutes to obtain an evaluation sample. The resulting asphalt composition has high toughness, tenacity, 200,000 poise
It has a viscosity of 60 ° C. and a low viscosity of 200 ° C. as described above, and there is no problem in stability as a composition.

Asphalt mixture test: No. 6 crushed stone / coarse sand / stone powder = 82.0 / 13.0 / 5.0 A predetermined amount of crushed stone was heated to about 200 ° C., and then Yato was heated to 190 ° C. After mixing for 30 seconds with a 30 kg mixer manufactured by Kikai Kogyo Co., Ltd., the amount of straight asphalt corresponding to the amount of the binder (straight asphalt + polymer modifier + oil gelling agent) to the aggregate is 5%. For 1 minute, the polymer modifier and the oil gelling agent from the composition shown in Table 3 are added and mixed for 3 minutes, and placed in a predetermined mold and squeezed to obtain a specimen having a porosity of about 20%. Produced. Each of the test pieces had a low cantaburo loss rate and was good.

Both the composition properties and the mixture properties were excellent, and it was confirmed that the asphalt composition and the mixture were highly balanced.

Examples 34 to 39 Asphalt composition test; straight asphalt 6 manufactured by Showa Shell Co., Ltd., heated and melted at 180 ° C.
0-80, chloroprene (CR) as a polymer modifier
Modifier: Denka Hardway II type manufactured by Denki Kagaku Kogyo Co., Ltd. or Styrene-Butadiene Block Copolymer (SBS) Modifier: Tufrene 315 manufactured by Asahi Kasei Kogyo Co., Ltd. Gelol D or 12-hydroxystearic acid manufactured by K.K. was added in a prescribed amount in the order shown in Table 4 and melt-mixed.
After complete melting and mixing, the sample was cured and defoamed for about 10 minutes to obtain an evaluation sample. The obtained asphalt composition is at 200 ° C.
Although the viscosity is somewhat high, it is in the range of practical use, and in some cases, the stability is slightly inferior, but the high toughness, tenacity,
It has a viscosity of 60,000 ° C. or more and a good composition.

Asphalt mixture test: No. 6 crushed stone / coarse sand / stone powder = 82.0 / 13.0 / 5.0 A predetermined amount of crushed stone was heated to about 200 ° C., and then Yato was heated to 190 ° C. After mixing for 30 seconds with a 30 kg mixer manufactured by Kikai Kogyo Co., Ltd., the amount of straight asphalt corresponding to the amount of the binder (straight asphalt + polymer modifier + oil gelling agent) to the aggregate is 5%. For 1 minute, the polymer modifier and the oil gelling agent from the composition shown in Table 4 were added and mixed for 3 minutes, and the mixture was placed in a predetermined mold and compacted to obtain a specimen having a porosity of about 20%. Produced. Each of the test pieces had a low cantaburo loss rate and was good.

Both the composition properties and the mixture properties were excellent, and it was confirmed that the composition was a well-balanced asphalt composition and mixture.

Example 9 Asphalt mixtures corresponding to 13 to 20 were spread on a roadbed. It was confirmed that it had sufficient performance as drainage pavement and permeable pavement.

Comparative Example 1 Straight asphalt 60-8 manufactured by Showa Shell Co., Ltd.
0 and Gelol D manufactured by Shin Nihon Rika Co., Ltd. as oil gelling agents were evaluated in the same manner as in Example 1 at predetermined amounts shown in Table 5. The composition has low toughness, tenacity, and low viscosity at 60 ° C., and the mixture has a cantablon loss rate of 29.5.
%, Which was not satisfactory.

Comparative Example 2 Straight asphalt 60-8 manufactured by Showa Shell Co., Ltd.
0 and a chloroprene (CR) -based modifier as a polymer modifier: Denka Hardway II type manufactured by Denki Kagaku Kogyo Co., Ltd. were evaluated in the same manner as in Example 1 at predetermined amounts shown in Table 5.
The composition had a low viscosity at 60 ° C., and the mixture had a high cantaburo loss rate of 25.8%, which was not satisfactory.

Comparative Examples 3 and 4 Straight asphalt 60-8 manufactured by Showa Shell Co., Ltd.
0 and a styrene-butadiene block copolymer (SBS) -based modifier as a polymer modifier: Tufpren 315 manufactured by Asahi Kasei Kogyo Co., Ltd. were evaluated in the same manner as in Example 1 at predetermined amounts shown in Table 5. As a composition, the viscosity at 60 ° C. is low,
The mixture had a high cantablon loss rate and was not satisfactory.

Comparative Example 5 Straight Asphalt 60-8 manufactured by Showa Shell Co., Ltd.
0 and a styrene-butadiene block copolymer (SBS) -based modifier as a polymer modifier: Tufpren 315 manufactured by Asahi Kasei Kogyo Co., Ltd. were evaluated in the same manner as in Example 1 at predetermined amounts shown in Table 5. As a composition, the viscosity was high at 200 ° C., and as a mixture, the loss rate of cantablon was high, and the composition was not satisfactory.

Comparative Example 6 Straight asphalt 60-8 manufactured by Showa Shell Co., Ltd.
0 and a styrene-butadiene block copolymer (SBS) -based modifier as a polymer modifier: Tufpren 315 manufactured by Asahi Kasei Kogyo Co., Ltd. were evaluated in the same manner as in Example 1 at predetermined amounts shown in Table 5. As a composition, the viscosity at 60 ° C. is low,
The viscosity at 200 ° C. was high, the stability of the binder was poor, and the mixture had a high cantablon loss rate, which was not satisfactory.

[0046]

[Table 1]

[0047]

[Table 2]

[0048]

[Table 3]

[0049]

[Table 4]

[0050]

[Table 5]

[0051]

As described above, the asphalt composition of the present invention has a high mechanical strength and a high low-temperature viscosity, has excellent stability as a composition, and has a good workability and excellent mixture. It has a cantaburo loss rate and provides excellent permeable pavement and drainage pavement.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 101: 00)

Claims (6)

[Claims] 1. Asphalt: (A) natural rubber, styrene-butadiene random copolymer, polychloroprene, polybutadiene, acrylonitrile-butadiene copolymer, olefin-based polymer, urethane-based polymer, polyester-based polymer, ethylene- One or more selected from vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, styrene-butadiene block copolymer, styrene-isoprene block copolymer, acrylic polymer and styrene polymer Polymer modifier, (B)
An asphalt composition comprising an oil gelling agent. 2. A method comprising adding (A) a polymer modifier in an amount of 1 to 20% by weight based on the total amount of the composition, and (B) adding an oil gelling agent in an amount of 0.1 to 5% by weight based on the total amount of the composition. The asphalt composition according to claim 1, characterized in that: 3. The asphalt composition according to claim 1, wherein the oil gelling agent is 1,3: 2,4 dibenzylidene sorbitol and / or 1,3: 2,4 dibenzylidene xylitol. 4. An asphalt mixture comprising the asphalt composition according to claim 1. 5. A drainable pavement comprising the asphalt mixture according to claim 4. 6. A permeable pavement comprising the asphalt mixture according to claim 4.