KR101849311B1 - Asphalt mixtures and pavement construction method using the same thing - Google Patents

Asphalt mixtures and pavement construction method using the same thing Download PDF

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KR101849311B1
KR101849311B1 KR1020160061833A KR20160061833A KR101849311B1 KR 101849311 B1 KR101849311 B1 KR 101849311B1 KR 1020160061833 A KR1020160061833 A KR 1020160061833A KR 20160061833 A KR20160061833 A KR 20160061833A KR 101849311 B1 KR101849311 B1 KR 101849311B1
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asphalt
mm
weight
delete delete
aggregate
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KR1020160061833A
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Korean (ko)
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KR20170007104A (en
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김현욱
이호정
권수안
김낙석
조신행
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주식회사 포스코건설
한국건설기술연구원
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/18Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04Waste materials; Refuse
    • C04B18/14Waste materials; Refuse from metallurgical processes
    • C04B18/141Slags
    • C04B18/142Steelmaking slags, converter slags
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2/00Lime, magnesia or dolomite
    • C04B2/02Lime
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/08Fats; Fatty oils; Ester type waxes; Higher fatty acids, i.e. having at least seven carbon atoms in an unbroken chain bound to a carboxyl group; Oxidised oils or fats
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/26Bituminous materials, e.g. tar, pitch
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00Hydraulic cements
    • C04B7/02Portland cement
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/18Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/182Aggregate or filler materials, except those according to E01C7/26
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/18Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/22Binder incorporated in hot state, e.g. heated bitumen
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/30Adapting or protecting infrastructure or their operation in transportation
    • Y02A30/31Relating to road transportation
    • Y02A30/33Ground surface material
    • Y02A30/333Warm-mix asphalt
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/90Reuse, recycling or recovery technologies cross-cutting to different types of waste
    • Y02W30/91Use of waste materials as fillers for mortars or concrete
    • Y02W30/94Use of waste materials as fillers for mortars or concrete from metallurgical processes

Abstract

The present invention relates to an asphalt composition containing an aggregate containing steelmaking slag having a maximum particle diameter of 10 mm, wherein when the synthetic granules are 10 mm, 5 mm, 2.5 mm, 1.2 mm, 0.6 mm, 0.3 mm, 0.15 mm and 0.08 mm, Wherein the asphalt composition comprises 98 to 99.7%, 75 to 80%, 45 to 57%, 27 to 40%, 17 to 27%, 10 to 16%, 7 to 9% and 4 to 6% By presenting the packaging method, it is excellent in durability, water resistance, strength, adhesive strength, shortening of traffic control time, excellent workability and economical.

Description

[0001] ASPHALT COMPOSITION AND PAVEMENT CONSTRUCTION METHOD USING THE SAME THING [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to civil engineering and technical fields, and more particularly, to an asphalt composition and an asphalt pavement method using the same.

In Korea, the waste generated from the steelmaking process accounts for 50% of the main products, and by 2015 there is an enormous amount of about 28 million tons.

These wastes contain a large amount of effective resources that can be recycled, such as iron, carbon, and limestone, and thus can be recycled as aggregates.

In the United States, Australia, Canada, and Europe, slag has been reworked with excellent aggregate and used as aggregate for high value added asphalt and cement concrete.

In Korea, it is difficult to collect high quality aggregate because it is difficult to collect pavement for road pavement and new development of pavement due to strengthened law on conservation of natural environment in recent years. In some cases, aggregate wave is generated depending on area.

In accordance with the demands of the times, efforts are being actively made to reuse slag generated as a by-product in a steel mill as aggregate and utilize it as a road pavement material.

According to previous studies, the criteria such as density, abrasion, etc. of the slag aggregate satisfies the criteria of the road aggregate in Korea sufficiently and the value of Marshall Stability of the asphalt mixture using the slag aggregate is high Surface and base mixture standards.

Also, the rutting resistance can be confirmed to be superior to the crush run mixture using the slag aggregate asphalt mixture.

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

However, in the field of slag recycling in Korea, it is limited to simple use of slag powder and roadbed material, which is insufficient in terms of usage and utilization compared to foreign countries.

Further, in the case of mixing asphalt of slag aggregate, incomplete coating occurs due to the characteristics of the surface of slag aggregate. Therefore, it is necessary to solve the above problems and to recover the physical properties of the residual asphalt.

Disclosure of the Invention The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an asphalt composition and an asphalt pavement method using the same, which are excellent in durability, water resistance and strength and excellent in adhesion, shorten traffic control time, The purpose is to provide.

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

The asphalt composition of the present invention comprises 90 to 97% by weight of the aggregate; 1 to 6% by weight filler; And 1 to 7% by weight of a binder.

The aggregate contained 0.15 part by weight of steel making slag based on the aggregate; 0.15 parts by weight of recycled aggregate; And 0.7 parts by weight of a general aggregate.

It is preferable that the filler is any one or a mixture of two or more of limestone powder, Portland cement, slaked lime and recovered dust.

The binder contains 85 to 95% by weight of common asphalt; 2 to 7% by weight of SBS modifier; And 2 to 8% by weight of an emulsifier.

The general asphalt may contain 5 to 15 parts by weight of saturated hydrocarbons; 30 to 45 parts by weight aromatic; 30 to 45 parts by weight of a resin; And 5 to 20 parts by weight of asphaltenes.

The binder comprises 82 to 90% by weight of common asphalt; 0.1 to 9% by weight of a warming additive; 0.05 to 2% by weight of a corrosion inhibitor; And 1 to 17% by weight of a reinforcing agent; .

Preferably, the warming additive comprises a wax component additive and a polyether amine component additive.

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

The wax component additive is any one of a polyethylene wax having a melting point of 60 ° C or higher or a synthetic wax synthesized by a fischer-Tropsh process, and the polyether amine component preferably has a molecular weight of 800 or more.

The polyether amine component preferably comprises an ether functionality formed by ethylene oxide and propylene oxide.

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

The reinforcing agent is a by-product of the reduced pressure distillation step, and the by-product of the reduced pressure distillation step is preferably a hydrocarbon compound having an aromatic content of 50% or more produced at the middle stage of the reduced pressure distillation step.

As a by-product of the above vacuum distillation step, it is preferable that the flash point according to ASTM D93 is not less than 230 DEG C and the viscosity (60 DEG C) according to ASTM D2171 is not more than 1,000 centipoise (cP).

The asphalt composition of the present invention preferably has a porosity of 3.5 to 7%.

The asphalt pavement method using the asphalt composition according to an embodiment of the present invention comprises: a step of mixing and manufacturing the asphalt composition; A pretreatment step of removing foreign matters from the asphalt pavement surface; And an installation step of installing the asphalt composition on an outer surface of the asphalt pavement surface.

In the manufacturing step, the mixing temperature of the asphalt composition is preferably 130 to 140 ° C.

Another asphalt pavement method using the asphalt composition according to an embodiment of the present invention includes a manufacturing step of mixing the asphalt composition for forming the base layer and the surface layer, respectively; A base layer forming step of forming the base layer by placing the asphalt composition in an area for carrying the asphalt pavement; A step of installing a bituminous material on top of the base layer; And a surface layer forming step of forming the surface layer by placing the asphalt composition on top of the installed bituminous material.

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

In the manufacturing step, the mixing temperature of the asphalt composition to form the surface layer is 130 to 140 ° C, and the compaction temperature is 115 to 125 ° C.

In the base layer forming step, the base layer preferably has a thickness of 8 to 12 cm.

In the surface layer forming step, the thickness of the surface layer is preferably 3 to 7 cm.

The present invention provides an asphalt composition and an asphalt pavement method using the same, which is excellent in durability, water resistance and strength, excellent in adhesion, shortens traffic control time, excellent in workability, and economical.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a graph showing composite particle size of an asphalt mixture of the present invention. FIG.
2 is a graph showing the synthetic particle size of the asphalt mixture of the present invention containing recycled aggregate
3 and the following are experimental results for verifying the effects of the present invention,
3 is a graph showing a composite particle size curve of an aggregate;
Figure 4 is an image of a turning compander used in the verification test.
5 is an image showing the completion of production of a specimen.
6 is an image showing a specimen set in a Kim Test assembly for deformation strength test.
7 is a simulation of indirect tensile strength.
Fig. 8 is an image showing a state in which an indirect tensile strength test is carried out through a specimen. Fig.
9 is an image showing a state in which a cyclic running test is performed.
Fig. 10 is an image showing a state in which a slab specimen is mounted for wheel tracking test. Fig.
11 is a graph showing the results of measurement of deformation strength.
12 is a graph showing the results of indirect tensile strength measurement.
13 is a graph showing the result of measuring the dynamic stability of the wheel tracking test result.

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

The present invention relates to an asphalt composition containing an aggregate containing steelmaking slag having a maximum particle diameter of 10 mm, wherein when the synthetic granules are 10 mm, 5 mm, 2.5 mm, 1.2 mm, 0.6 mm, 0.3 mm, 0.15 mm and 0.08 mm, Is in the range of 98 to 99.7%, 75 to 80%, 45 to 57%, 27 to 40%, 17 to 27%, 10 to 16%, 7 to 9% and 4 to 6%.

Table 1 and Fig. 1 are tables and graphs showing the above synthesized particle size distribution.

Figure 112016048386415-pat00001

In Korea, an asphalt composition having steel slag mixed therein has been developed. However, the synthetic particle size standard of aggregate having a maximum particle diameter of 10 mm has not been established yet.

Therefore, in the present invention, maximizing the performance of the asphalt composition containing the steelmaking slag by maximizing the composite particle size standard of the 10 mm wheat grain size mixture is the most important feature.

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

First, steel slag is mixed to improve the resistance to plastic deformation and cracking resistance of asphalt, and the strength, durability, and water resistance of the asphalt are excellent, so that the performance of the asphalt concrete for road can be effectively exhibited.

In addition, the present invention can maximize the above advantages by clearly showing the synthetic granularity standard of 10 mm wheat grain size.

Second, by using steelmaking slag as an asphalt aggregate, carbon dioxide generated in the manufacturing process is reduced, which is eco-friendly and economical.

Third, the asphalt pavement using the asphalt composition of the present invention is excellent in workability and is advantageous in that it can shorten the traffic control time because the middle temperature technique is applied.

Fourth, when the asphalt pavement is applied using the asphalt composition of the present invention, the pavement is excellent in adhesion to the pavement, and various finishing effects and non-slip effect can be increased through the thin pavement.

The asphalt composition as described above contains 90 to 97% by weight of aggregate; 1 to 6% by weight filler; 1 to 7% by weight of a binder.

Table 2 shows the composition ratio of the above ingredients.

Figure 112016048386415-pat00002

The above aggregate (based on aggregate) contained 0.15 part by weight of steelmaking slag; 0.15 parts by weight of recycled aggregate; And 0.7 parts by weight of a common aggregate.

In this case, the environmental pollution source can be reduced by using the recycled aggregate, and the economic efficiency can be improved.

Table 3 and FIG. 2 are tables and graphs showing the synthetic particle size distribution of the aggregate containing the recycled aggregate.

Figure 112016048386415-pat00003

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

Here, the recovered dust is subjected to the PRV (Percent of Rigden Voids) test and the appropriate recovered dust is used.

Further, the binder contains 85 to 95% by weight of common asphalt; 2 to 7% by weight of SBS modifier; And 2 to 8% by weight of an emulsifier.

Table 4 shows the composition ratio of the above ingredients.

Figure 112016048386415-pat00004

Here, the general asphalt is a mixture of 5 to 15 parts by weight of saturated hydrocarbons; 30 to 45 parts by weight aromatic; 30 to 45 parts by weight of a resin; 5 to 20 parts by weight of asphaltenes.

Table 5 shows the composition ratio of the above ingredients.

Figure 112016048386415-pat00005

The above binder contains 82 to 90% by weight of common asphalt; 0.1 to 9% by weight of a warming additive; 0.05 to 2% by weight of a corrosion inhibitor; And 1 to 17% by weight of a reinforcing agent.

At this time, the warming additive includes a wax component additive and a polyether amine component additive, and a mixture weight ratio of the wax component additive to the polyether amine component additive is 1: 0.2 to 1: 1.

The wax component and the polyetheramine component have complementary functions.

The wax component serves to improve resistance to plastic deformation and to prevent deterioration of high-temperature performance, while the polyetheramine component improves crack resistance to prevent degradation of low-temperature performance.

The wax component additive is any one of a polyethylene wax having a melting point of 60 ° C or higher or a synthetic wax synthesized by a fischer-Tropsh process, and the polyether amine component preferably has a molecular weight of 800 or more.

It is preferred that the polyether amine component in the mesophilic additive comprises an ether functional group formed by ethylene oxide and propylene oxide.

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

The above corrosion inhibitor prevents the corrosion of the slag aggregate by suppressing the oxidation while allowing the asphalt to be uniformly coated in the slag aggregate having a rough surface and a large pore.

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

As a by-product of the reduced pressure distillation step, it is preferable that the flash point according to ASTM D93 is 230 DEG C or more and the viscosity (60 DEG C) according to ASTM D2171 is 1,000 centipoise (cP) or less.

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

In addition, the reinforcing agent of the present invention minimizes the heterogeneity with the asphalt raw material of the existing vegetable oils and improves the fatigue crack resistance.

The asphalt composition of the present invention preferably has a porosity of 3.5 to 7%.

As described above, the mid-temperature thin layer asphalt pavement method can be carried out by using the asphalt composition of the present invention.

The asphalt pavement method can be made by the following process.

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

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

And an asphalt composition is installed on the outer surface of the asphalt pavement surface.

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

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

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

The mixing temperature of the asphalt composition for forming the surface layer is preferably 130 to 140 캜, and the compaction temperature is preferably 115 to 125 캜.

Next, a base layer forming step for forming the base layer by pouring the asphalt composition into the area for carrying the asphalt pavement is performed.

Here, the thickness of the base layer is preferably 8 to 12 cm.

Then, a bitumen material installation step is carried out to install a bitumen material on the top of the base layer.

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

After 1 to 2 hours have elapsed from the installation of the bituminous material, a surface layer forming step of forming the surface layer by placing the asphalt composition on the top of the installed bituminous material is performed.

At this time, it is preferable that the surface layer has a thickness of 3 to 7 cm.

The asphalt pavement method with such a process is advantageous in functional, construction, and economical aspects because it is easy to construct and realizes a mild thin road pavement having excellent performance.

Hereinafter, experimental examples for explaining the effects of the present invention will be described.

In order to verify the performance of the asphalt composition containing the steelmaking slag as the aggregate of the present invention, the specimens were produced with optimum asphalt content (OAC) according to the mixing ratio of the present invention, and the plastic deformation resistance, (resistance of cracking).

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

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

Item Spec PG64-22
(HMA)
PG76-22
(HMA)
PG76-22
(WMRA)
Penetration (1 / 10mm) - 71 27 Absolute viscosity
(at 60 ° C, Poise)
- 2000 88468
Viscosity, cP, 135 ° C - 415 1747 G / sd, kPa 64 ° C ≥1.0 1.21 - 76 ° C - 1.46 (R) After TFOT G / sd, kPa 64 ° C ≥2.2 1.1 - 76 ° C - 2.52 PVA Residue Stiffness, MPa -12 ° C ≤300 190 155.6 M-Value -12 ° C ≥0.3 0.35 0.34 Performance Grade 64-22 76-22 76-22
PG64-22 Asphalt is a commonly used asphalt in Korea and is classified into 60-80 grade AP-5
PG76-22 (HMA) is a modified asphalt for hot mix (hot mix asphalt: HMA, H-PMA)
PG76-22 (WMRA) is a modified asphalt for warm mix (Warm mix asphalt: WMRA)

As shown in Table 7, granular aggregate of 10 mm maximum coarse aggregate and fine aggregate of slag and slag aggregate were used. For comparison, granite crushed stone was used in Kangwon-do, Gangwon-do, and limestone fraction (mineral filler) limestone powder) was used.

Figure 112016048386415-pat00006

In the case of mixing design, the synthetic granularity is based on the maximum size of coarse aggregate of 10 mm, and the particle sizes determined by synthesizing each aggregate are shown in the graphs shown in Table 8 and FIG.

Figure 112016048386415-pat00007

The specimens were manufactured by using OAC determined based on the mixing design data provided by Kyonggi University. The specimens were 150 mm in diameter and 100 mm in diameter.

It was changed from 150mm to 100mm according to the supply and demand condition of aggregate.

FIG. 4 shows a superpave gyratory compactor of PINE used in the present verification test, and FIG. 5 is a photograph showing the production of a specimen.

In preparing the mixture, the aggregate and asphalt heating short term aging temperature and time are as shown in Table 9.

Aggregate asphalt Agg
(° C)
asphalt
(° C)
Goal Mix
Temperature (℃)
Short-term aging turning
promise
Temperature (℃) Time (H) Granite PG64-22 165 160 155 155 One 100
Slag
PG64-22 165 160 155 155 One 100
PG76-22 175 170 170 170 One 100 PG76-22 145 160 135 135 2 100

First, a deformation strength (SD) test was conducted.

The deformation strength of the asphalt mixture is one of the important parameters of the mixing design (R2 = 0.9 or more) as a characteristic value showing a high correlation with the rutting characteristics.

The deformation strength test method can evaluate the resistance to the plastic deformation of the asphalt mixture more thoroughly considering the direction of compaction in the preparation of specimens and the direction of loading under load in fracture test and considering resistance to axial compression and shear.

In addition, the objectivity of the deformation strength test is acknowledged, and the Marshall stability and deformation strength standard are applied to the Ministry of Land, Transport and Maritime Affairs Directive.

The deformation strength test of asphalt concrete was calculated by reading the maximum load (P) and the vertical deformation (y) pressed from the surface at a load-deformation curve obtained by applying a load to a specimen taken out from a 60 ° C water tank.

5 is a view showing a specimen set in a Kim test assembly for deformation strength test.

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

The indirect tensile strength test can be used to predict cracking resistance by providing tensile strength and tensile strain useful for characterizing asphalt mixtures.

In this study, indirect tensile strength tests were performed on three binder mixtures at temperatures of 5, 25 and 40 ℃.

The indirect tensile strength test is performed by measuring the maximum load at the time of failure by placing a specimen with a specimen of 100 mm diameter inside the specimen and placing the specimen in the top and bottom of the specimen.

Fig. 7 is a simulation of the indirect tensile strength, and Fig. 8 is a view showing an indirect tensile strength test carried out on a specimen.

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

In the present invention, a 305 × 305 × 50 mm slab specimen was prepared with a roller press compactor aiming for a porosity of 4% (FIG. 9).

The prepared specimens were stored for 24 hours at room temperature and then stored at 60 ° C for 6 hours. The settlement amount was measured at a test temperature of 60 ° C, a load weight of 686 kN (70 kg), and a running time (number of passes and times) of 2,520 times for 60 minutes at 42 times / min. The material of the wheel is steel, diameter 200mm, width 50mm and stroke length 230mm (KS F 2374).

10 shows a slab specimen mounted for wheel tracking test.

The results of the experiment are as follows.

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

Figure 112016048386415-pat00008

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

In the case of the asphalt mixture according to the present invention, the value of H-PMA and WMRA was 5.0 and 4.54 MPa, respectively, which were 3.96 and 3.24, respectively.

That is, the asphalt mixture according to the present invention showed higher deformation strength than the comparative granite general mixture, and the deformation strengths showed similar values.

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

As shown in Table 11 and Fig. 12, the indirect tensile strength of the slag and ordinary asphalt mixture decreased with increasing temperature.

Figure 112016048386415-pat00009

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

At 25 and 40 ℃, the indirect tensile strength of the slag AP-5 mixture was 0.49 and 0.18 MPa, which was about 70%, compared with 0.72 and 0.25 MPa, respectively.

However, the tensile strength of the asphalt mixture according to the present invention shows a value of 0.95 and 0.84 MPa for the H-PMA and WMRA mixtures, respectively, which increases by 31 and 17%, respectively.

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

The results of the dynamic stability test are as follows.

The dynamic stability of the wheel tracking test results is shown in Fig.

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

However, the porosity of the slag AP-5 mixture was found to be 5.8, indicating that insufficient compaction was the cause.

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

The dynamic stability of the WMRA mixture was 1,666 pass / mm, indicating an increase in plastic deformation.

As a result of the test for verifying the effect of the asphalt composition of the present invention as described above, it was confirmed that the road pavement with excellent performance can be ensured because it is excellent in the deformation strength, tensile strength and dynamic stability.

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

Agg Binder OAC
(%)
Density
(g / cm3)
Air Voids
(%)
VMA
(%)
VFA
(%)
S D
(MPa)
Steelmaking slag (15%)
Recycled aggregate (15%)
General aggregate (70%)
WMRA
PG76-22

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 above test results, the deformation strength meets the criteria of 4.25MPa, which is the medium vehicle standard of the Ministry of Land, Transport and Traffic.

Table 13 shows the results of the dynamic stability test of the specimens prepared using the PG76-22 (WMRA) binder together with the aggregate containing the recycled aggregate.

Agg Binder 45 min strain
(mm)
Final settlement
(mm)
DS KS
(pass / mm)
DS NEW
(pass / mm)
Strain rate
(mm / min)
Steelmaking slag (15%)
Recycled aggregate (15%)
General aggregate (70%)
WMRA
PG76-22

2.13

2.28

4128

2876

0.0102

As shown in the above test results, the dynamic stability according to one embodiment of the present invention is 4128, which is confirmed to satisfy the dynamic stability standard of 2500, Korea Highway Corporation.

Table 14 shows the results of the resilient modulus (M R ) test of the specimens prepared using the PG76-22 (WMRA) binder with the aggregate containing the recycled aggregate.

Agg.
Binder
AP
Cont. (%)
Air
Voids (%)
5 ℃ 25 ℃ 45 ° C
M R M R M R Steelmaking slag (15%)
Recycled aggregate (15%)
General aggregate (70%)
WMRA
PG76-22

5.6

3.4

20,208

12,640

1,372

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

Claims (22)

  1. 90 to 97% by weight of aggregate;
    1 to 6% by weight filler;
    1 to 7% by weight of a binder,
    The porosity is 3.5 to 7%
    The aggregate is, based on the weight of the aggregate,
    0.15 parts by weight of steel making slag having a maximum particle diameter of 10 mm,
    0.15 parts by weight of recycled aggregate,
    And 0.7 parts by weight of a general aggregate,
    Composite particle size
    And 75% to 80%, 45% to 57%, 27% to 40%, and 17% to 27% in the case of the checker 10 mm, 5 mm, 2.5 mm, 1.2 mm, 0.6 mm, 0.3 mm, 0.15 mm, , 10 to 16%, 7 to 9%, and 4 to 6%
    The filler
    Limestone powder, Portland cement, slaked lime and recovered dust, or a mixture of two or more thereof,
    The binder
    82 to 90% by weight of common asphalt;
    0.1 to 9% by weight of a warming additive;
    0.05 to 2% by weight of a corrosion inhibitor; And
    1 to 17% by weight of a reinforcing agent,
    The warming additive
    The wax component additive and the polyether amine component additive are mixed in a weight ratio of 1: 0.2 to 1: 1,
    The wax component additive is any one of a polyethylene wax having a melting point of 60 ° C or higher or a synthetic wax synthesized by a fischer-Tropsh process,
    The polyether amine component has a molecular weight of 800 or more,
    Wherein the polyether amine component comprises an ether functionality formed by ethylene oxide and propylene oxide,
    The corrosion inhibitor
    A phenolic antioxidant, a phenolic anticorrosion inhibitor, an amine anticorrosion agent or a sulfur anticorrosion agent,
    The reinforcing agent
    By-product of the reduced pressure distillation step, and the by-product of the reduced pressure distillation step is a hydrocarbon compound having an aromatic content of 50% or more produced in the middle stage of the reduced pressure distillation step, wherein the by-product of the vacuum distillation step has a flash point of 230 ° C or higher according to ASTM D93 , And the viscosity (60 DEG C) according to ASTM D2171 is 1,000 centipoise (cP) or less.
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  16. The asphalt pavement method using the asphalt composition of claim 1,
    A production step of mixing and mixing the asphalt composition;
    A pretreatment step of removing foreign matters from the asphalt pavement surface;
    And installing the asphalt composition on an outer surface of the asphalt pavement surface
    Asphalt pavement method.
  17. 17. The method of claim 16,
    The manufacturing step
    Wherein the mixing temperature of the asphalt composition is 130 to 140 ° C.
  18. The asphalt pavement method using the asphalt composition of claim 1,
    A base layer and an asphalt composition for forming a surface layer;
    A base layer forming step of forming the base layer by placing the asphalt composition in an area for carrying the asphalt pavement;
    A step of installing a bituminous material on top of the base layer;
    A surface layer forming step of forming the surface layer by placing the asphalt composition on an upper part of the installed bituminous material;
    Asphalt pavement method.
  19. 19. The method of claim 18,
    The manufacturing step
    The mixing temperature of the asphalt composition for forming the base layer is 130 to 185 캜,
    And the compaction temperature is set to be 115 to 150 占 폚.
  20. 19. The method of claim 18,
    The manufacturing step
    The mixing temperature of the asphalt composition for forming the surface layer is 130 to 140 캜,
    Wherein the compaction temperature is 115 to 125 占 폚.
  21. 19. The method of claim 18,
    The base layer forming step
    Wherein the base layer has a thickness of 8 to 12 cm.
  22. 19. The method of claim 18,
    The surface layer forming step
    Wherein the thickness of the surface layer is 3 to 7 cm.
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WO2018128208A1 (en) * 2017-01-06 2018-07-12 한국건설기술연구원 Asphalt composition and asphalt paving method using same
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100795184B1 (en) * 2006-09-08 2008-01-16 인천선강(주) The asphalt concrete which and uses this uses the oxidized slag as the electricity
KR100823352B1 (en) * 2008-01-25 2008-04-17 (주)무량기술 Thin layer paving composition, permeable concrete and manufacturing method water permeable warm mix asphalt concrete
KR100898393B1 (en) * 2009-02-09 2009-05-18 (주)현대아스콘 Regeneration ascon and manufacturing method thereof
JP2010007353A (en) * 2008-06-26 2010-01-14 Himeji Ichi Asphalt pavement repairing method
KR101283942B1 (en) * 2012-10-31 2013-07-09 하나케이텍(주) Cold asphalt mixture using recycled aggregates and pavement structure with it
KR101505829B1 (en) * 2013-11-07 2015-03-25 한국화학연구원 Modifier Composition for Warm Mixing Asphalt, and Warm Mixing Asphalt Mixture manufactured using the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100795184B1 (en) * 2006-09-08 2008-01-16 인천선강(주) The asphalt concrete which and uses this uses the oxidized slag as the electricity
KR100823352B1 (en) * 2008-01-25 2008-04-17 (주)무량기술 Thin layer paving composition, permeable concrete and manufacturing method water permeable warm mix asphalt concrete
JP2010007353A (en) * 2008-06-26 2010-01-14 Himeji Ichi Asphalt pavement repairing method
KR100898393B1 (en) * 2009-02-09 2009-05-18 (주)현대아스콘 Regeneration ascon and manufacturing method thereof
KR101283942B1 (en) * 2012-10-31 2013-07-09 하나케이텍(주) Cold asphalt mixture using recycled aggregates and pavement structure with it
KR101505829B1 (en) * 2013-11-07 2015-03-25 한국화학연구원 Modifier Composition for Warm Mixing Asphalt, and Warm Mixing Asphalt Mixture manufactured using the same

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