WO2018128208A1 - Asphalt composition and asphalt paving method using same - Google Patents

Abstract

The present invention relates to an asphalt composition in which aggregates including steel slag having a maximum particle diameter of 10 mm are mixed, and provides: an asphalt composition of which the combined gradation is respectively 98-99.7%, 75-80%, 45-57%, 27-40%, 17-27%, 10-16%, 7-9%, and 4-6% when sieve sizes are 10 mm, 5 mm, 2.5 mm, 1.2 mm, 0.6 mm, 0.3 mm, 0.15 mm, and 0.08 mm; and an asphalt paving method using the same, thereby having excellent durability, water resistance, and strength, and superior adhesive strength, shortening traffic control time, having good constructability, and being economical.

Description

Asphalt composition and asphalt pavement method using the same

The present invention relates to the field of civil engineering, and more particularly, to an asphalt composition and an asphalt pavement method using the same.

In Korea, the amount of waste generated from the steelmaking process accounts for 50% of the main products, generating about 28 million tons in 2015.

These wastes contain a large amount of effective resources, such as iron, carbon, and limestone, which can be recycled to aggregate.

Already in the United States, Australia, Canada, Europe, slag is reprocessed into excellent aggregates and used as aggregates for high value-added asphalt and cement concrete.

In Korea, the law on conservation of natural environment has recently been strengthened, making it difficult to collect aggregates for road paving and new development of quarries, which makes it difficult to supply high-quality aggregates.

In order to meet the demands of the times, efforts are being actively made to reprocess slag generated as a by-product in steel mills as aggregates and to use it as road paving materials.

According to the previous study, slag aggregates satisfy the domestic road aggregate standards such as density and abrasion, and the Marshall Stability value of asphalt mixture using slag aggregate It was found to meet the mixture criteria for surface and substrate.

In addition, the rutting resistance can be seen that the asphalt mixture using the slag aggregate is superior to the general crush run (crush run) mixture.

Therefore, the slag aggregate can be fully utilized for asphalt concrete for roads.

However, in the domestic slag recycling field, it is merely used as a fine slag powder and roadbed material for road use, which is insufficient in terms of usage and utilization compared to foreign countries.

In addition, in the case of the asphalt mixture of slag aggregate, there is a problem such as incomplete coating occurs due to the characteristics of the surface of the slag aggregate, there is a need for a solution to solve this problem and to restore the properties of the residual asphalt.

The present invention is derived to solve the above problems, excellent durability, water resistance, strength, excellent adhesion, shortening traffic control time, excellent workability, economical asphalt composition and asphalt paving method using the same Its purpose is to provide.

In order to solve the above problems, the present invention is an asphalt composition containing an aggregate containing a steelmaking slag having a maximum particle diameter of 10mm, the synthetic particle size is 10mm, 5mm, 2.5mm, 1.2mm, 0.6mm, 0.3mm, 0.15mm , 0.08mm, 98-99.7%, 75-80%, 45-57%, 27-40%, 17-27%, 10-16%, 7-9%, 4-6% asphalt composition, respectively present.

Asphalt composition of the present invention is 90 to 97% by weight of the aggregate; Filler 1 to 6% by weight; It is preferred to include a binder; 1 to 7% by weight.

The aggregate is 0.15 parts by weight of steelmaking slag based on the aggregate; Circulating aggregate 0.15 parts by weight; And general aggregate 0.7 parts by weight; It is preferable to include.

The filler is preferably any one of limestone powder, portland cement, slaked lime, recovered dust or a mixture of two or more.

The binder is 85 to 95% by weight of general asphalt; 2-7 wt% SBS modifier; It is preferable to include; 2 to 8% by weight emulsifier.

The general asphalt is 5 to 15 parts by weight of saturated hydrocarbon; 30 to 45 parts by weight of aromatics; 30 to 45 parts by weight of resin; It is preferable to include; 5 to 20 parts by weight of asphaltenes.

The binder is 85 to 95% by weight of general asphalt; 0.1-10% by weight of the neutralizing additive; Corrosion inhibitor 0.05-2% by weight; And 1 to 20% by weight reinforcing agent; It is preferable to include.

The neutralizing additive preferably includes a wax component additive and a polyetheramine component additive.

The mixing weight ratio of the wax component additive to the polyetheramine component additive is preferably 1: 0.2 to 1: 1.

The wax component additive is either a polyethylene wax having a melting point of 60 ° C. or more, or a synthetic wax synthesized by a Fischer-Tropsh process, and the polyetheramine component preferably has a molecular weight of 800 or more.

The polyetheramine component preferably comprises ether functional groups formed by ethylene oxide and propylene oxide.

The corrosion inhibitor is preferably any one of a phenol-based corrosion inhibitor, an amine corrosion inhibitor or a sulfur-based corrosion inhibitor.

The reinforcing agent is a by-product of the vacuum distillation process, and the by-product of the vacuum distillation process is preferably in the form of a hydrocarbon compound having an aromatic content of 50% or more produced in the middle stage of the vacuum distillation process.

The by-product of the vacuum distillation process has a flash point of 230 ° C. or higher according to ASTM D93, and a viscosity (60 ° C.) of ASTM D2171 of 1,000 centipoise (cP) or less.

As for the asphalt composition of this invention, it is preferable that porosity is 3.5 to 7%.

Asphalt pavement method using an asphalt composition according to an embodiment of the present invention manufacturing step of mixing the asphalt composition; A pretreatment step of removing foreign matter from the asphalt pavement surface; It includes; laying step of laying the asphalt composition on the outer surface of the asphalt pavement surface.

The manufacturing step is preferably such that the mixing temperature of the asphalt composition is 130 ~ 140 ℃.

Another asphalt pavement method using an asphalt composition according to an embodiment of the present invention is a manufacturing step of mixing the asphalt composition to form a base layer and a surface layer, respectively; A base layer forming step of forming the base layer by pouring the asphalt composition in a region for paving the asphalt; A bitumen material placing step of depositing a bitumen material on the base layer; And a surface layer forming step of forming the surface layer by pouring the asphalt composition on top of the laid bitumen material.

In the manufacturing step, the mixing temperature of the asphalt composition for forming the base layer is 130 to 185 ° C, and the compaction temperature is preferably 115 to 150 ° C.

The manufacturing step is preferably a mixing temperature of the asphalt composition for forming the surface layer is 130 ~ 140 ℃, compaction temperature is 115 ~ 125 ℃.

The base layer forming step is preferably such that the thickness of the base layer is 8 ~ 12cm.

The surface layer forming step is preferably such that the thickness of the surface layer is 3 ~ 7cm.

The present invention provides excellent durability, water resistance, strength, excellent adhesion, shortening traffic control time, excellent workability, economical asphalt composition and asphalt paving method using the same.

1 is a graph showing the synthetic particle size of the asphalt mixture of the present invention.

Figure 2 is a graph showing the composite particle size of the asphalt mixture of the present invention including recycled aggregate

3 is an experimental result for verifying the effect of the present invention,

4 is a schematic diagram of the indirect tensile strength.

5 is a graph showing the results of measuring strain strength.

6 is a graph showing the results of indirect tensile strength measurement.

7 is a graph showing the results of measuring the dynamic stability of the wheel tracking test results.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached table and the accompanying drawings.

The present invention is an asphalt composition containing an aggregate containing steelmaking slag having a maximum particle diameter of 10mm, the synthetic particle size is 10mm, 5mm, 2.5mm, 1.2mm, 0.6mm, 0.3mm, 0.15mm, 0.08mm, respectively. 98 ~ 99.7%, 75 ~ 80%, 45 ~ 57%, 27-40%, 17 ~ 27%, 10-16%, 7-9%, 4-6%.

Table 1 and FIG. 1 is a table and a graph showing the above synthetic particle size distribution.

Asphalt composition in which steelmaking slag is mixed has been developed in Korea, but a composition based on the synthetic particle size of aggregate having a maximum particle diameter of 10 mm has not been developed.

Therefore, in the present invention, by presenting the synthetic particle size standards of the 10 mm dense mixture, the biggest feature is that the performance of the asphalt composition incorporating steelmaking slag can be maximized.

More specifically, the advantages obtained through the asphalt composition of the present invention are as follows.

First, by mixing steelmaking slag, the plastic deformation resistance and crack resistance of the asphalt is improved, and the strength, durability, and water resistance are excellent, so that the performance as asphalt concrete for roads can be effectively exhibited.

In addition, in the present invention, by clearly presenting the 10 mm compactness synthetic particle size standards, it is possible to maximize the above advantages more.

Secondly, by using steelmaking slag as an asphalt aggregate, carbon dioxide generated in the manufacturing process is reduced to have an advantage of being environmentally friendly and economical.

Third, when the asphalt pavement using the asphalt composition of the present invention, there is an advantage in that the construction time is excellent, and the traffic control time can be shortened because the medium temperature technology is applied.

Fourth, when the asphalt pavement using the asphalt composition of the present invention, the adhesion to the pavement material is excellent, there is an advantage that can increase the various finishing and non-slip effect through the thin layer pavement.

Asphalt composition as above is 90 to 97% by weight aggregate; Filler 1 to 6% by weight; It comprises a binder; 1 to 7% by weight.

Table 2 shows the above component combination ratio.

Above aggregate (based on aggregate) is 0.15 parts by weight of steelmaking slag; Circulating aggregate 0.15 parts by weight; And general aggregate 0.7 parts by weight; can be used in a configuration including.

In this case, it is possible to reduce the environmental pollution source using the recycled aggregate, improve the economics.

Table 3 and Figure 2 is a table and graph showing the distribution of synthetic particle size of the aggregate containing circulating aggregate.

The filler may be any one of limestone powder, portland cement, slaked lime, recovered dust or a mixture of two or more.

Here, the recovered dust is subjected to a Percent of Rigden Voids (PRV) test to use the appropriate number of dust.

In addition, the binder is 85 to 95% by weight of general asphalt; 2-7 wt% SBS modifier; Emulsifier 2 ~ 8% by weight; is configured to include.

Table 4 shows the above component combination ratio.

Here, the general asphalt is 5 to 15 parts by weight of saturated hydrocarbon; 30 to 45 parts by weight of aromatics; 30 to 45 parts by weight of resin; 5 to 20 parts by weight of asphaltenes; is configured to include.

Table 5 shows the above component combination ratio.

Above binder is 85 to 95% by weight of general asphalt; 0.1-10% by weight of the neutralizing additive; Corrosion inhibitor 0.05-2% by weight; And a reinforcing agent 1 to 20% by weight; a binder containing can be used.

In this case, the neutralizing additive may include a wax component additive and a polyetheramine component additive, and a mixing weight ratio of the wax component additive to the polyetheramine component additive may be 1: 0.2 to 1: 1.

The wax component and the polyetheramine component have a complementary function.

The wax component plays a role of preventing the deterioration of high temperature performance by improving plastic deformation resistance, and the polyetheramine component plays a role of preventing degradation of low temperature performance by improving crack resistance.

The wax component additive is either a polyethylene wax having a melting point of 60 ° C. or more, or a synthetic wax synthesized by a Fischer-Tropsh process, and the polyetheramine component preferably has a molecular weight of 800 or more.

The polyetheramine component in the neutralizing additive preferably comprises ether functional groups formed by ethylene oxide and propylene oxide.

It is preferable that the corrosion inhibitor is any one of a phenol-based corrosion inhibitor, an amine corrosion inhibitor or a sulfur-based corrosion inhibitor.

The above corrosion inhibitors prevent the corrosion of the slag aggregates by preventing the oxidation of the asphalt evenly coated in the slag aggregates having a rough surface and a lot of pores.

The adjuvant is a by-product of the vacuum distillation process, and the by-product of the vacuum distillation process is preferably in the form of a hydrocarbon compound having an aromatic content of 50% or more produced in the intermediate stage of the vacuum distillation process.

The by-product of the vacuum distillation process preferably has a flash point of 230 ° C. or higher according to ASTM D93 and a viscosity (60 ° C.) of ASTM D2171 of 1,000 centipoise (cP) or less.

The reinforcing agent is a physical reinforcing agent, and is added to the asphalt composition using recycled aggregate to reinforce the stiffness and penetration of the asphalt composition.

In addition, the reinforcing agent of the present invention improves fatigue cracking resistance by minimizing heterogeneity with asphalt raw materials possessed by conventional vegetable oils.

It is preferable that the asphalt composition of this invention is 3.5 to 7% of porosity.

As described above, the middle temperature asphalt pavement method may be performed using the asphalt composition of the present invention.

Asphalt paving method can be made by the following process.

First, a manufacturing step of mixing and preparing an asphalt composition and a pretreatment step of removing foreign matter from the asphalt pavement surface are performed.

At this time, it is preferable that the mixing temperature of the asphalt composition is 130 to 140 ° C.

And the laying step of laying the asphalt composition on the outer surface of the asphalt pavement surface.

In addition, the asphalt pavement method of the present invention can be carried out by the method of forming the base layer and the surface layer of the asphalt structure as follows.

First, a manufacturing step of mixing and manufacturing the asphalt compositions for forming the base layer and the surface layer is made.

At this time, it is preferable that the mixing temperature of the asphalt composition for forming the base layer is 130 to 185 ° C, and the compaction temperature is 115 to 150 ° C.

In addition, it is preferable that the mixing temperature of the asphalt composition for forming a surface layer is 130-140 degreeC, and compaction temperature may be 115-125 degreeC.

Next, the base layer forming step of forming the base layer by pouring the asphalt composition in the area for asphalt pavement is made.

Here, it is preferable to make the thickness of a base layer into 8-12 cm.

And the step of installing bitumen material is carried out to install the bitumen material on top of the base layer.

The bitumen laying step above is a process for solving the problem of penetration of the tack coat and mixing with the base material.

After 1 to 2 hours have elapsed after laying the bitumen material, a surface layer forming step is performed in which an asphalt composition is poured on top of the laid bitumen material to form a surface layer.

At this time, it is preferable that the surface layer be 3-7 cm in thickness.

Asphalt pavement method made of such a process has the advantage that it is easy in construction, and excellent in performance, mid-temperature thin-layer pavement in terms of functionality, construction, and economics.

Hereinafter, an experimental example for examining the effects of the present invention will be described.

In order to verify the performance of the asphalt composition in which steelmaking slag is mixed as the aggregate of the present invention, the specimens were prepared at the optimum asphalt content (OAC) according to the component blend ratio proposed in the present invention, and thus plastic deformation resistance and crack resistance were obtained. (resistant of cracking) and the like.

That is, the general mixture using the asphalt mixture and granite crushed stone of the present invention was prepared as a specimen, and the performance was compared and analyzed according to the deformation strength test, the indirect tensile strength test, and the wheel tracking test.

As shown in Table 6, three types of asphalt were used for preparing the specimens, PG64-22 (pen. 60-80), PG76-22 (HMA), and PG76-22 (WMRA).

As shown in Table 7, the aggregate used slag coarse aggregate and slag fine aggregate with the maximum size of coarse aggregate 10mm, and used granite crushed stone in Hoengseong-gun, Gangwon-do for comparison, and limestone powder (mineral filler) limestone powder) was used.

In the case of the compound design, the composite particle size was applied to the coarse aggregate maximum size of 10mm standard, the particle size determined by synthesizing each aggregate is shown in the graph shown in Table 8 and FIG.

The specimen was fabricated using the OAC determined based on the mixed design data provided by Gyeonggi University. The specimens were produced with 150mm diameter and 100mm specimens.

According to the supply and demand conditions of the aggregate was produced by changing from 150mm to 100mm.

This verification test was carried out using PINE's superpave gyratory compactor after the specimen was prepared.

In preparing the mixtures, aggregate and asphalt heating short term aging temperatures and times are shown in Table 9.

First, the deformation strength (SD) test was performed.

Deformation strength of asphalt mixtures is one of the important variables in formulation design (R2 = 0.9 or more), which is a characteristic value that correlates well with the rutting properties.

Deformation strength test method is the same as the compaction direction in the specimen production and the loading direction of the load in the fracture test, and the resistance to plastic deformation of the asphalt mixture can be more overview, considering the axial compression and shear resistance.

In addition, in recognition of the objectivity of the strain test, the Ministry of Land, Transport and Maritime Affairs guides the application of Marshall stability and strain strength in parallel.

The strain strength test of asphalt concrete was calculated by reading the maximum load (P) and the vertical strain (y) pressed from the surface at the load-strain curve obtained by loading the specimens taken out of the 60 ° C water bath.

Deformation strength test was carried out by setting specimens in the Kim Test assembly.

Next, an indirect tensile strength (ITS) test was performed.

Indirect tensile strength tests can be used to predict crack initiation resistance by providing tensile strength and tensile strain useful for characterizing asphalt mixtures.

Indirect tensile strength tests were performed on three binder mixtures at temperatures of 5, 25 and 40 ° C.

The indirect tensile strength test is calculated by measuring the maximum load at break by applying load to the specimen with a concave load strip with a diameter of 100 mm inside the specimen.

4 is a schematic diagram of the indirect tensile strength, the indirect tensile strength test was carried out through the specimen.

Next, the dynamic stability by the wheel tracking test was tested.

In the present invention, a slab specimen of 305 x 305 x 50 mm was prepared with a roller press compactor to achieve a porosity of 4% in order to perform a repeat driving test.

The prepared specimens were tested after 6 hours storage at 60 ℃ after room temperature curing for 24 hours. The amount of settlement according to 2,520 repeated runs (time and number of passes) for 60 minutes was measured at a test temperature of 60 ° C., a loading load of 686 kN (70 kg) and a number of passes of 42 times / min. The wheel is made of steel, diameter 200 mm, width 50 mm and one stroke stroke 230 mm (KS F 2374).

The result of the experiment as above is as follows.

First, in the case of the deformation strength, the deformation strength of the general mixture using the granite aggregate and the slag aggregate and the normal and H-PMA, WMRA mixture is shown in Table 10, FIG.

The deformation strength of the general granite aggregate mixture was 4.05 MPa, which is higher than the standard 3.2.

In the case of the asphalt mixture of the present invention is 3.96, the modified H-PMA, WMRA mixture is 5.0, 4.54 MPa was shown to satisfy the general 3.2 standard, Ministry of Land, Infrastructure and Transport, 4.25 MPa for heavy vehicles.

That is, in the case of the asphalt mixture according to the present invention, it showed a higher deformation strength than the comparative granite general mixture, it can be seen that the deformation strength showed a similar value.

The results of testing the indirect tensile strength are as follows.

As shown in Table 11, Figure 6, the indirect tensile strength of slag and general asphalt mixture decreased with increasing temperature.

At 5 ° C, the mixture showed the highest tensile strength of 3.39 MPa and the slag AP-5, H-PMA and WMRA mixtures showed 2.54, 2.72 and 2.3 MPa, respectively.

The indirect tensile strength at 25 and 40 ° C was about 70% at 0.49 and 0.18 MPa for the slag AP-5 mixture compared to 0.72 and 0.25 MPa for the general mixture.

However, the tensile strength of the asphalt mixture according to the present invention shows that the H-PMA and WMRA mixtures have values of 0.95 and 0.84 MPa, respectively, increasing by 31 and 17%, respectively.

Tensile strength of H-PMA and WMRA mixture was about 15% higher than that of H-PMA mixture.

Next, dynamic stability test results are as follows.

Wheel stability test results show dynamic stability in FIG. 6.

The dynamic stability of the general slag mixture was 242 pass / mm, which was 50% higher than that of 530 of the general mixture.

However, the porosity of the slag AP-5 mixture was 5.8.

The dynamic stability of the H-PMA mixture was 1,491 pass / mm, which appears to be an increase in the plastic deformation resistance with the use of modified asphalt.

In the case of the WMRA mixture, the dynamic stability was increased to 1,666 pass / mm.

As described above, as a result of the experiment for verifying the effect of the asphalt composition of the present invention, because it is excellent in all the deformation strength, tensile strength, dynamic stability, it was confirmed that the road paving of excellent performance can be secured.

Table 12 shows the strain strength results of specimens prepared using PG76-22 (WMRA) binder with aggregates containing recycled aggregates.

Agg	Binder	OAC (%)	Density (g / cm 3)	Air Voids (%)	VMA (%)	VFA (%)	S D (MPa)
Steelmaking slag (15%) Circulating aggregate (15%) General aggregate (70%)	WMRAPG76-22	5.6	2.454	3.4	16.7	79.8	6.86
			2.456	3.3	16.6	80.3
			2.453	3.4	16.7	79.8

As shown in the test results above, the strain strength satisfies the 4.25 MPa standard, which is the standard for heavy vehicles.

Table 13 shows the results of dynamic stability testing of specimens prepared using PG76-22 (WMRA) binders with aggregates containing recycled aggregates.

Agg	Binder	45 min deformation (mm)	Final settlement (mm)	DS KS (pass / mm)	DS NEW (pass / mm)	Strain rate (mm / min)
Steelmaking slag (15%) Circulating aggregate (15%) General aggregate (70%)	WMRAPG76-22	2.13	2.28	4128	2876	0.0102

As shown in the above test results, the dynamic stability according to an embodiment of the present invention is 4128, and it can be confirmed that the Korea Highway Corporation satisfies the dynamic stability standard of 2500.

Table 14 shows the recovery modulus (M _R ) test results of specimens prepared using PG76-22 (WMRA) binder together with aggregates containing recycled aggregates.

Agg.	Binder	APCont. (%)	AirVoids (%)	5 ℃	25 ℃	45 ℃
				M R	M R	M R
Steelmaking slag (15%) Circulating aggregate (15%) General aggregate (70%)	WMRAPG76-22	5.6	3.4	20,208	12,640	1,372

Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above It will be said that both the technical idea and the technical idea which together with the base are included in the scope of the present invention.

Claims (22)

1. Asphalt composition incorporating aggregate containing steelmaking slag having a maximum particle diameter of 10mm,

   Composite particle size

   For checkers 10mm, 5mm, 2.5mm, 1.2mm, 0.6mm, 0.3mm, 0.15mm, 0.08mm, 98 ~ 99.7%, 75 ~ 80%, 45 ~ 57%, 27-40%, 17 ~ 27%, respectively , 10-16%, 7-9%, 4-6% asphalt composition.
2. The method of claim 1,

   90 to 97% by weight of the aggregate;

   Filler 1 to 6% by weight;

   Binders 1-7 wt%;

   Asphalt composition comprising a.
3. The method of claim 2,

   The aggregate is

   0.15 parts by weight of steelmaking slag based on the aggregate;

   Circulating aggregate 0.15 parts by weight; And

   Asphalt composition, comprising 0.7 parts by weight of general aggregate.
4. The method of claim 2,

   The filler is

   Asphalt composition, characterized in that the limestone powder, Portland cement, slaked lime, recovered dust any one or a mixture of two or more.
5. The method of claim 2,

   The binder is

   General asphalt 85 to 95% by weight;

   2-7 wt% SBS modifier;

   Emulsifier 2-8 wt%;

   Asphalt composition comprising a.
6. The method of claim 5,

   The general asphalt

   5-15 parts by weight of saturated hydrocarbon;

   30 to 45 parts by weight of aromatics;

   30 to 45 parts by weight of resin;

   5 to 20 parts by weight of asphaltenes;

   Asphalt composition comprising a.
7. The method of claim 2,

   The binder is

   General asphalt 85 to 95% by weight;

   0.1-10% by weight of the neutralizing additive;

   Corrosion inhibitor 0.05-2% by weight; And

   Asphalt composition, characterized in that it comprises a;
8. The method of claim 7, wherein

   The neutralizing additive is asphalt composition comprising a wax component additive and a polyetheramine component additive.
9. The method of claim 8,

   Asphalt composition, characterized in that the mixing weight ratio of the wax component additive to the polyetheramine component additive is 1: 0.2 to 1: 1.
10. The method of claim 8,

    The wax component additive is any one of a polyethylene wax having a melting point of 60 ° C. or more or a synthetic wax synthesized by a Fischer-Tropsh process, and the polyetheramine component has an molecular weight of 800 or more. Composition.
11. The method of claim 8,

    The polyetheramine component is characterized in that it comprises an ether functional group formed by ethylene oxide and propylene oxide.
12. The method of claim 7, wherein

    The preservative is an asphalt composition, characterized in that any one of the phenol-based corrosion inhibitor, amine-based corrosion inhibitor or sulfur-based corrosion inhibitor.
13. The method of claim 7, wherein

    The reinforcing agent is a by-product of the reduced pressure distillation process, and the by-product of the reduced pressure distillation process is an asphalt composition, characterized in that the hydrocarbon compound in the form of an aromatic content of 50% or more produced in the intermediate stage of the reduced pressure distillation process.
14. The method of claim 13,

    The by-product of the vacuum distillation process has a flash point of 230 ° C. or higher according to ASTM D93, and an asphalt composition according to ASTM D2171 having a viscosity (60 ° C.) of 1,000 centipoise (cP) or less.
15. The method of claim 1,

    Asphalt composition, characterized in that the porosity is 3.5-7%.
16. As asphalt paving method using the asphalt composition of any one of claims 1 to 15,

    A manufacturing step of mixing and manufacturing the asphalt composition;

    A pretreatment step of removing foreign matter from the asphalt pavement surface;

    A laying step of laying the asphalt composition on an outer surface of the asphalt pavement surface;

    Asphalt pavement method characterized in that it comprises.
17. The method of claim 16,

    The manufacturing step

    Asphalt paving method, characterized in that the mixing temperature of the asphalt composition is 130 ~ 140 ℃.
18. As asphalt paving method using the asphalt composition of any one of claims 1 to 15,

    A manufacturing step of mixing the asphalt compositions for forming a base layer and a surface layer, respectively;

    A base layer forming step of forming the base layer by pouring the asphalt composition in a region for paving the asphalt;

    A bitumen material placing step of depositing a bitumen material on the base layer;

    A surface layer forming step of forming the surface layer by pouring the asphalt composition on top of the laid bitumen material;

    Asphalt pavement method characterized in that it comprises.
19. The method of claim 18,

    The manufacturing step

    The mixing temperature of the asphalt composition for forming the base layer is 130 ~ 185 ℃,

    Asphalt pavement method characterized in that the compaction temperature to be 115 ~ 150 ℃.
20. The method of claim 18,

    The manufacturing step

    The mixing temperature of the asphalt composition for forming the surface layer is 130 ~ 140 ℃,

    Asphalt pavement method characterized in that the compaction temperature to be 115 ~ 125 ℃.
21. The method of claim 18,

    The base layer forming step

    Asphalt pavement method characterized in that the thickness of the base layer to be 8 ~ 12cm.
22. The method of claim 18,

    The surface layer forming step

    Asphalt pavement method, characterized in that the thickness of the surface layer is 3 ~ 7cm.

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