JPH06157917A - Binder composition for colored pavement - Google Patents

Abstract

PURPOSE:To obtain a binder composition having excellent toughness, tenacity, deformation resistance, aggregate-holding force, kinetic stability and workability and useful for paving of a heavy traffic route, etc., by adding a dicyclopentadiene-type petroleum resin, etc., to a specific binder for colored pavement. CONSTITUTION:This binder composition is produced by incorporating (A) a binder for colored pavement produced by using an aromatic process oil as a main component and adding a teleblock copolymer such as styrene-butadiene- styrene or styreneisoprene-styrene copolymer to the aromatic process oil with (B) a dicyclopentadiene-type petroleum resin and a C5 petroleum resin to improve the modifying effect of the teleblock copolymer.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a binder composition for colored pavement, and more specifically, to obtain high deformation resistance, high aggregate grasping force and dynamic stability for roadway pavement and water permeable / drainage pavement in heavy traffic routes. The present invention relates to a colored pavement binder composition.

[0002]

2. Description of the Related Art Conventionally, a binder composition for a colored pavement is usually used in an asphalt mixture by adding a thermoplastic resin and rubber to a paraffin-based, naphthene-based or aromatic light-colored lubricating oil fraction produced from crude oil. It has the same properties as the straight asphalt used and is mixed with aggregates, fillers, pigments, etc. and used exclusively as a mixture for colored paving for sidewalks, bicycle paths and light traffic roadways. ing.

In recent years, there has been an increasing demand for the use of colored paving mixtures that clearly indicate vehicle division zones such as bus lanes and vehicle stoppages in order to alleviate traffic congestion and the frequent occurrence of accidents accompanying the deterioration of traffic conditions. Also, on the other hand, if water pools occur in the roadway during rainfall, the impact on the third party due to water splashes and the comfort of running the vehicle will be impaired. However, as a part of environmental improvement, there is a demand for coloring this permeable / drainable pavement.

[0004]

However, the mixture using the above-mentioned conventional binder composition for colored paving has only the same degree of deformation resistance as that of the mixture using straight asphalt. , There is no problem in use in places where light load is applied such as sidewalks, bicycle paths and light traffic roads, but deformation resistance against use in places where heavy load is applied such as heavy traffic routes and vehicle stop parts. Performance is too low, and the aggregate grasping force required for use in places where heavy loads are applied and dynamic stability required for use in places where dynamic loads such as trucks are repeatedly applied cannot be obtained. There's a problem.

In addition, since the open-grain size asphalt mixture used for water-permeable / drainage pavement has less meshing and bonding area between aggregates than general dense-grain asphalt mixture, it is even more There is a demand for a binder with a high gripping power, and even with commonly used straight asphalt and modified asphalt, the gripping power required is not sufficiently satisfied. Since the deformation resistance is inferior to that of the asphalt mixture, the one having high deformation resistance is required.

That is, when the conventional mixture using the binder composition for colored pavement is used in a heavy load place such as a heavy traffic line or a vehicle stop, or when it is used as a water-permeable / drainable colored pavement in a roadway part. Is higher than straight asphalt and modified asphalt used in asphalt mixture, that is, a softening point and 60 which is a measure of deformation resistance.
It is required to improve the viscosity at ℃ and the toughness / tenacity value that is a measure of the grasping power of the aggregate and the dynamic stability of the mixture.However, these requirements cannot be met, and therefore the practical stage is reached. The current situation is not.

As a result of intensive studies on these requirements, the present invention has been extensively studied and put to practical use as a modifier for asphalt, and styrene / butadiene / styralene rubber (hereinafter referred to as SBS rubber) and styrene / isoprene / Attention was paid to the modification effect of a teleblock polymer such as styrene rubber (hereinafter referred to as SIS rubber).

The modifying effect of this SBS rubber or SIS rubber has a double structure due to the incompatibility of styrene and butadiene or isoprene, and at room temperature the end blocks of styrene are mutually affected by van der Waals force (intermolecular attractive force). A physical cross-linking called a domain that is bonded to the resin is formed to form a discontinuous aggregate, and this discontinuous aggregate is formed in the binder to prevent plastic flow, softening point and 60 ° C viscosity. To increase the deformation resistance, increase the toughness / tenacity which is a measure of the aggregate grasping force, and further improve the dynamic stability of the mixture.

However, since the domains are only physically cross-linked by Van der Waals' force, the domains are separated in the presence of heat or an aromatic solvent having a good compatibility with styrene. However, a sufficient modifying effect was not obtained. That is, as a binder composition for a colored pavement, an aromatic process oil is generally used because it is excellent in thermal stability and colorability and is inexpensive, and the aromatic process oil is SBS. It has good compatibility with rubber and SIS rubber. Therefore, when aromatic process oil is used, the end block of styrene is dissolved, and when the mixture is returned to room temperature, the mixture becomes strong and tough. The formation of the domain to be deleted is not recognized, and as a result, S
The original intended modification effect of BS rubber and SIS rubber was not obtained.

According to the present invention, by selecting the type of petroleum resin to be added to the colored pavement binder composition, even if the colored pavement binder composition mainly contains aromatic process oil, the SBS rubber is used. The original modification effect of SBS rubber and SIS rubber is brought out without increasing the addition ratio of SIS rubber and SIS rubber, and the deformation resistance, aggregate grasping power and dynamics are equal to or higher than those of modified asphalt type II. The stability can be improved, and it can be used not only in places with heavy loads such as heavy traffic routes and vehicle stops, but can also be used as water-permeable / drainage pavement in such places, and also ensure sufficient workability. It is an object to provide a colored binder composition for a colored pavement.

[0011]

In order to solve the above-mentioned problems, the present invention is mainly composed of an aromatic process oil, and the aromatic process oil is made of styrene / butadiene / styrene or styrene / isoprene / styrene. For colored pavement binders containing block copolymers,
A dicyclopentadiene-based petroleum resin and a C5-based petroleum resin that increase the modification effect of the teleblock copolymer are added.

[0012]

With the above structure, a tereblock copolymer such as styrene / butadiene / styrene or styrene / isoprene / styrene is added to the aromatic process oil, and the colored pavement binder is added to the aromatic block type process oil. A binder composition for a colored pavement, which is mainly composed of an aromatic process oil by adding a dicyclopentadiene-based petroleum resin and a C5-based petroleum resin, which are compatible with each other and increase the modification effect of the teleblock copolymer. However, without increasing the addition ratio of SBS rubber or SIS rubber, the original modification effect of SBS rubber or SIS rubber can be brought out, and modified asphalt II
Dynamic stability in the mixture while increasing the softening point, which is a guideline for deformation resistance, and the toughness / tenacity value, which is a guideline for grasping power of aggregate in asphalt mixture It is possible to improve the rupture strength, which is a guideline for, so that it is suitable not only for use on heavy traffic lines or places where heavy loads are applied, such as vehicle stops, but also especially for water-permeable and drainage pavement on roadways. Can be used as

Further, since it is not necessary to increase the addition ratio of the teleblock copolymer, workability can be sufficiently ensured.

[0014]

EXAMPLES Examples will be described below. As the aromatic process oil described here, one of the two types of oil A and oil B shown in Table 1 was used.

[0015]

[Table 1]

Further, it is best to perform a wheel tracking test to determine the dynamic stability as an evaluation of the mixture, but since a large amount of the mixture is required and it takes a long time, the evaluation of the mixtures of Examples 1 to 3 is performed. Is a rupture strength test (test temperature of 60 ° C.) that correlates with the dynamic stability obtained from the wheel tracking test, and the wheel tracking test is the final use for the water-permeable / drainable pavements of Examples 4 to 6. Only the mixture was evaluated. As the particle size of the mixture used in the crush strength test, the drainage particle size was used in order to easily find the difference in the properties of the binder.

[0017]

Example 1 Oil A of Table 1 was used as an aromatic process oil, and as shown in Table 2, 42.5 parts of oil A was mixed with C which is incompatible with SBS rubber so as to have a penetration of 55.
57.5 parts of 5 type petroleum resin was added as the first base binder (1), and 57.5 parts of oil A was incompatible with SBS rubber. Dicyclopentadiene type petroleum resin (D
CPD-based petroleum resin) (42.5 parts) to prepare a second base binder (2), and these first and second base binders (1) and (2) are designated as test number 1 and are 100:
0, test number 2 as 90:10, test number 3 as 8
0:20, 70:30 as test number 4, 60:40 as test number 5, 50:50 as test number 6, 40:60 as test number 7, 30:70 as test number 8,
Table 3 below shows the results of measuring the respective properties when Test No. 9 was mixed at a compounding ratio of 0: 100 and 7% of SBS rubber was added thereto.

Table 3 shows the property values of the modified asphalt type II used for heavy traffic routes as Reference Example 1, and the oil name of Table 1 as the aromatic process oil as Reference Example 2. The modified asphalt II was prepared by adding SBS rubber only to the second base binder (2) containing A and having a blending ratio of dicyclopentadiene-based petroleum resin having a penetration of 55 as shown in Table 2. The results obtained when an attempt was made to obtain a crushing strength almost the same as the crushing strength of the mold are also shown.

Further, the relationship between the plotted results of the rupture strengths of Test Nos. 1 to 9 is shown by the solid line in FIG.

[0020]

[Table 2]

[0021]

[Table 3]

As a result, the first base binder (1)
Test No. 1 and second base binder using only (2)
In the case of the test number 9 using only the above, in all cases, the value of the crush strength is much lower than the value of the crush strength of the modified asphalt II type. When C5 petroleum resin and dicyclopentadiene petroleum resin were added to the process oil, as is clear from the results of Test Nos. 2 to 8, aromatic process oils of C5 petroleum resin and dicyclopentadiene petroleum resin were added. By changing the blending ratio, the softening point and 60
An increase in the toughness / tenacity, which is a measure of the grip strength of aggregates in ° C viscosity and asphalt mixture, and an increase in the value of crush strength, which is a measure of dynamic stability, can be observed. It is possible to increase the softening point, 60 ° C viscosity and toughness / tenacity value more than the modified asphalt type II, and also improve the crush strength, so it can be used even on the target heavy traffic route. It was confirmed that the properties of the binder that could be shared were obtained.

From the above results, the solubility of SBS rubber can be adjusted by combining aromatic process oil with C5 petroleum resin and dicyclopentadiene petroleum resin which are incompatible with SBS rubber, and By grasping the optimum blending amounts of the C5 petroleum resin and the dicyclopentadiene petroleum resin with respect to the aromatic process oil, in particular, as shown by the solid line in FIG. It is possible to obtain a peak value that sharply rises near the blending ratio, which greatly exceeds the crush strength of the modified asphalt type II, so when the mixture is returned to the use temperature, the domain of SBS rubber is increased. It can be presumed that the SBS rubber was formed, and thereby, the modification effect based on the formation of the domain of the SBS rubber was elicited, and the mixture It has the effect of greatly increasing the strength, therefore, it is more preferable for Test No. 5 or 6 in Example 1.

As shown in Reference Example 2, the modified asphalt II was prepared by adding SBS rubber to the first base binder (1) which was prepared by adding only C5 petroleum resin to aromatic process oil. It is possible to add 14% of SBS rubber to obtain the same crush strength as that of the mold, but it is necessary to use a large amount of expensive teleblock copolymer such as SBS rubber, let alone 150 °. The C viscosity was 4470 cst, and the colored pavement binder composition of Reference Example 2 was heated.
There is a problem that workability is deteriorated because the viscosity at high temperature when a mixture is manufactured by mixing fillers, pigments and the like becomes very high.

On the other hand, by mixing dicyclopentadiene-based petroleum resin and C5-based petroleum resin in an appropriate amount in the aromatic process oil, it is possible to form domains of the SBS rubber without increasing the SBS rubber addition rate. By utilizing the peak value of the crush strength, it exceeds the crush strength of the modified asphalt II type, which is economically advantageous and the viscosity at 150 ° C can be kept low. Heating the binder composition,
The workability in manufacturing the mixture by mixing the aggregate, the filler, the pigment and the like with this can also be excellent.

[0026]

Example 2 Oil B of Table 1 was used as the aromatic process oil, and as shown in Table 4, 48.0 parts of oil B was C5 petroleum incompatible with SBS rubber so that the penetration was 55. A third base binder (3) was compounded with 52.0 parts of a resin, and 61.5 parts of oil B was incompatible with SBS rubber. Dicyclopentadiene-based petroleum resin 3
A fourth base binder (4) was prepared by blending 8.5 parts, and these third and fourth base binders (3) and (4) were designated as test number 10 as shown in Table 5.
0: 0, test number 11 as 90:10, test number 12
As 80:20, test number 13 as 70:30, test number 14 as 60:40, test number 15 as 5
0:50, test number 16 as 40:60, test number 1
The following Table 5 shows the results of measuring the properties when 7 and 30:70 and Test No. 18 were mixed at a compounding ratio of 0: 100 and 7% of SBS rubber was added thereto.

Also, the relationship between the plotted results of the rupture strengths of test Nos. 10 to 18 is shown by the dotted line in FIG.

[0028]

[Table 4]

[0029]

[Table 5]

As a result, the third base binder (3)
In the case of Test No. 10 using only No. 4 and Test No. 18 using only the fourth base binder (4), the value of the crush strength was higher than that of the modified asphalt II type. In contrast to the very low value, when the C5 petroleum resin and the dicyclopentadiene petroleum resin were added to the aromatic process oil, it was clear from the results of test numbers 11 to 17 that the aromatic system oil By changing the blending ratio of C5 petroleum resin and dicyclopentadiene petroleum resin, which are incompatible with process oil, the softening point, which is a measure of deformation resistance, and the gripping power of aggregates in 60 ° C viscosity and asphalt mixture. It can be seen that the toughness / tenacity, which is a guideline for the test, and the value of the crush strength, which is a guideline for the dynamic stability, are increased. Among them, the test numbers 12 and 13 are examples. Improved asphalt II and higher softening point and 60 ° C viscosity and toughness / tenacity values, as well as improved crush strength, so it can be used well even on target heavy traffic routes. It was confirmed that the properties of the binder could be obtained.

Also in this case, the C5 petroleum resin and the dicyclopentadiene petroleum resin which are incompatible with the SBS rubber are combined with the aromatic process oil, and the optimum blending amount of the SBS rubber is grasped by grasping the optimum blending amount. The solubility can be adjusted optimally, and as a result, in particular, as shown by the dotted line in FIG. 1, the rupture strength can obtain a peak value that sharply increases near the compounding ratio of test number 13, and the value thereof is Since the crush strength of the modified asphalt type II is greatly exceeded, it can be inferred that domains were formed by the SBS rubber when the mixture was returned to the use temperature, which was based on the formation of the domains of the SBS rubber. It has the effect of eliciting a modifying effect and significantly increasing the strength of the mixture. Therefore, in Example 2, the test number 13 was used. Ri preferred.

Further, by utilizing the peak value of the rupture strength due to the domain formation of the SBS rubber, SB
Modified asphalt II even if the S rubber addition rate is not high
Since the crushing strength of the mold is exceeded and the economic merit is obtained, and the viscosity at 150 ° C can be suppressed to a low level, the colored pavement binder composition is heated to form an aggregate,
Workability in manufacturing a mixture by mixing fillers, pigments, etc. can also be excellent.

[0033]

Example 3 Oil A of Table 1 was used as an aromatic process oil, and 42.5 parts of oil A was mixed with C, which is incompatible with SIS rubber, so that the penetration is 55 as shown in Table 2.
57.5 parts of 5 petroleum resin is mixed with the first base binder (1), and 57.5 parts of oil A is mixed with 42.5 parts of dicyclopentadiene petroleum resin which is incompatible with SIS. A second base binder (2) was prepared and these first and second base binders (1) were tested with test number 19
As 100: 0, as test number 20 as 90:10, as test number 21 as 80:20, as test number 22 as 7
0:30, test number 23 as 60:40, test number 2
4 as 50:50, test number 25 as 40:60,
The following Table 6 shows the results of measuring the respective properties when 30:70 as the test number 26 and 0: 100 as the test number 27 were mixed, and SIS rubber 7% was added thereto.

The results of each of the rupture strength tests of Test Nos. 19 to 27 are shown by the one-dot chain line in FIG.

[0035]

[Table 6]

From the above results, in the case of the test number 19 using only the first base binder (1) and the test number 27 using only the second base binder (2), the values of the rupture strength were both. In comparison with the modified asphalt II type, which shows a very low value for the crush strength, the test was conducted when C5 petroleum resin and dicyclopentadiene petroleum resin were added to the aromatic process oil. As is clear from the results of Nos. 20 to 26, the aromatic process oil contains C
By changing the blending ratio of the 5 type petroleum resin and the dicyclopentadiene type petroleum resin, the softening point, which is a measure of deformation resistance, and the toughness tena, which is a measure of 60 ° C viscosity and the grasping power of the aggregate in the asphalt mixture, It is possible to recognize an increase in the value of rupture strength, which is a measure of the city and dynamic stability. Among them, as an example, the test number 23 has a softening point and a viscosity or toughness of 60 ° C. higher than that of the modified asphalt type II.・ While increasing the tenacity value,
Moreover, since it is possible to improve the crush strength, it was confirmed that the properties of the binder that could be sufficiently used even when used on the target heavy traffic route were obtained.

Also in this case, the C5 petroleum resin and the dicyclopentadiene petroleum resin, which are incompatible with the SIS rubber, are combined with the aromatic process oil, and the optimum blending amount of the SIS rubber is grasped by grasping the optimum blending amount. The solubility can be optimally adjusted so that, in particular, the rupture strength as shown by the dashed line in FIG.
It is possible to obtain a peak value that sharply rises near the compounding ratio of, and since the value greatly exceeds the crush strength of the modified asphalt type II, when the mixture is returned to the use temperature, SIS rubber It can be presumed that the domains were formed, and thereby, the modifying effect based on the domain formation of the SIS rubber was elicited, and the effect of significantly increasing the strength of the mixture was obtained. Further, by utilizing the peak value of the rupture strength due to the domain formation of the SIS rubber, even if the addition rate of the SIS rubber is not large, it exceeds the crush strength of the modified asphalt II type, which is economically advantageous. In addition, since the viscosity at 150 ° C. can be suppressed to a low level, the workability in producing a mixture by heating the colored pavement binder composition and mixing it with an aggregate, a filler, a pigment and the like is also improved. It can be done.

[0038]

Examples 4 to 6 Oil name A in Table 1 was used as the aromatic process oil, and C5 was added to 48.5 parts of this oil A.
A mixture of 34.5 parts of a petroleum-based petroleum resin and 17.0 parts of a dicyclopentadiene-based petroleum resin, that is, the first and second examples in which the highest rupture strength was obtained in Examples 1 and 3. 6 base binders (1) and (2)
The results obtained by adding 10% of SBS rubber as Example 4, 11% of SBS rubber as Example 5, and 12% of SBS rubber as Example 6 were added to the mixture of 0:40. , Shown in Table 7.

Further, Table 7 also shows three types of straight asphalt 60/80 as Reference Example 3, modified asphalt II type as Reference Example 4, and high viscosity asphalt used for drainage pavement as Reference Example 5. The sex was examined.

[0040]

[Table 7]

From the above results, in Examples 4, 5, and 6, the softening point, which is a measure of the deformation resistance, and the toughness / tenacity, which is a measure of the viscosity at 60 ° C. and the grasping power of the aggregate, are all taken. Shows a value equal to or higher than the high viscosity asphalt used for drainage pavement, and
As shown in Reference Example 4 in Table 7, the mixture using these binders showed a value equal to or higher than the value of the dynamic stability of the high-viscosity asphalt used for drainage pavement, and In addition to having the practicality of being suitable for water-permeable / drainage pavement, it can be lower than the modified asphalt type II and the high-viscosity asphalt even at the compaction temperature of the mixture, so that the workability is sufficiently satisfied.

[0042]

As described above, according to the present invention, an aromatic process oil is mainly used, and this aromatic process oil contains styrene, butadiene, styrene, or styrene.
Since a dicyclopentadiene-based petroleum resin and a C5-based petroleum resin, which increase the modification effect of the teleblock copolymer, were added to the colored binder for pavement to which a teleblock copolymer such as isoprene / styrene was added, an aromatic process Even in the case of a colored pavement binder composition mainly composed of oil, the original modifying effect of SBS rubber or SIS rubber can be brought out without increasing the addition ratio of SBS rubber or SIS rubber, and modified asphalt. Dynamic stability in the mixture while increasing the softening point, which is the standard of deformation resistance, and the viscosity at 60 ° C and the toughness / tenacity value, which is the standard of grasping power of the aggregate in the asphalt mixture. It is possible to improve the crush strength, which is a measure of the degree of damage. It can be used not only in places where heavy load is applied, but also as suitable for water-permeable / drainage pavement in the roadway. Moreover, since it is not necessary to add a large proportion of the teleblock copolymer, it can be used for colored pavement. It is possible to sufficiently secure workability when the binder composition is heated and the aggregate, the filler, the pigment and the like are mixed to produce a mixture.

[Brief description of drawings]

FIG. 1 is a characteristic diagram showing the peak value of crush strength in the test results of Examples 1 to 3.

Claims (1)

[Claims] 1. A colored pavement binder comprising an aromatic process oil as a main component, and a tereblock copolymer such as styrene / butadiene / styrene or styrene / isoprene / styrene added to the aromatic process oil. A binder composition for a colored pavement, characterized in that a dicyclopentadiene-based petroleum resin and a C5-based petroleum resin for increasing the modification effect of the block copolymer are added.