KR102589183B1 - Modified-Asphalt Concrete Composition with Improved Crack Resistance and Constructing Methods Using Thereof - Google Patents

Abstract

The present invention provides 1 to 30 parts by weight of styrene isoprene styrene, based on 100 parts by weight of asphalt; 1 to 30 parts by weight of styrene butadiene styrene; 1 to 30 parts by weight of petroleum resin; 800 to 1,500 parts by weight of aggregate; 0.1 to 5 parts by weight of a performance improver; 0.1 to 5 parts by weight of nanoceramic particles; 0.1 to 5 parts by weight of compatibilizer; 0.1 to 5 parts by weight of vegetable oil; 0.1 to 5 parts by weight of cellulose fiber; and a modified asphalt concrete composition with improved crack resistance containing 0.1 to 5 parts by weight of an antioxidant and a method of constructing the same.
The modified asphalt concrete composition with improved crack resistance according to the present invention has good crack resistance, high fluidity resistance, and/or durability, and does not easily cause plastic deformation, aging, and/or peeling, and prevents water penetration and potholes, It has the effect of allowing the pouring process to be easily performed at low cost.

Description

Modified-Asphalt Concrete Composition with Improved Crack Resistance and Constructing Methods Using Thereof}

The present invention relates to a modified asphalt concrete composition with improved crack resistance and a construction method thereof. More specifically, the PG grade performance is public grade PG 76-22, PG 76-28, PG 82-22, and PG 82-34. It relates to a modified asphalt concrete composition with improved physical properties of asphalt concrete, such as crack resistance, and a construction method using the same.

In general, asphalt is a black or dark brown solid or semi-solid thermoplastic material that is very complexly composed of thousands of types of polymer hydrocarbons (C-H) containing organic compounds and trace amounts of inorganic compounds, and has the characteristic of gradually changing into a liquid state when heated.

The asphalt is divided into types such as natural asphalt, petroleum-based asphalt, and paving tar, and straight asphalt and emulsified asphalt are widely known.

In addition, the asphalt is used as a binding material or adhesive material because it has excellent adhesion and adhesion to mineral materials. It is also used as a waterproofing material because it does not dissolve in water and is impermeable. The viscosity can be changed depending on the purpose of use. Its application range is diverse and it is used for various purposes such as road paving, waterproofing, general industrial purposes, and agricultural purposes.

Asphalt used for road paving is petroleum-based asphalt, and straight asphalt, which has excellent adhesion, extensibility, and water absorption, is generally used.

However, straight asphalt has the disadvantages of low softening point, high temperature sensitivity, weak weather resistance, and weak cohesion, so it is used by adding various modifiers to make up for these problems and to suit the characteristics of the place where it is used.

In general, types of asphalt modifiers include rubber series, thermoplastic resin series, thermosetting resin series, hydrocarbon series, filler series, fiber series, antioxidants, reducing agents, etc. Rubber series include natural rubber, Styrene Butadiene Rubber (SBR), and waste tires. (Crumb Rubber), etc. are used, and in the thermoplastic resin series, Styrene Butadiene Styrene (SBS), Ethylenevinylacetate (EVA), Polyethylene (PE), Polypropylene (PP), Polyvinyl Chloride (PVC), and Polyethylene Terephthalate (PET) are used. , The thermosetting resin series includes epoxy resin, urethane resin, acrylic resin, phenol resin, and petroleum resin, and the hydrocarbon series includes natural asphalt and gilsonite.

However, the asphalt modified materials developed so far have problems with cracks and plastic deformation of the pavement, which appear as the asphalt's resistance to low-temperature cracks and fatigue cracks decreases over time after construction due to the large temperature difference between the four seasons. Problems such as asphalt oxidation caused by exposure to sunlight and aggregate detachment due to weakened adhesion appear. In addition, it is not easy to secure uniform quality with field-injected modified materials (Plant-mix type), and pre-mix type (Pre-mix type) occurs. mixtype) Modified asphalt is difficult to preserve because it is not easy to mix the components uniformly and each component such as the modified material and asphalt depends on physical bonding, so storage is poor.

In particular, modified concrete, which improves the performance of concrete with fast-hardening cement and polymer, has been developed since 2000, and is widely used as a repair material for concrete road structures due to its short curing time, high water permeability resistance, and freeze-thaw resistance.

However, the modified concrete is expensive because it contains a large amount of latex, has a high heat reflectivity, so the prevention effect against early freezing in winter is less than that of conventional asphalt concrete, and has a low heat absorption rate, so it is difficult to change external temperature (daily temperature range, four seasons) like in Korea. ) In severe environments, there is a problem that cracks, surface peeling, and falling off (portholes) occur due to temperature stress.

Moreover, there are some bridges or special areas where general polymer-modified asphalt (PMA) pavement is difficult to withstand under traffic conditions where congestion is severe and the ratio of heavy vehicles is high.

Therefore, very strong asphalt pavement must be constructed thickly, but in the case of general asphalt pavement, it must not only be thick but also have strong elasticity, toughness, and tensile strength.

In general, steel box girder bridges as well as concrete bridges require a waterproofing process to prevent deterioration of the lower layer.

However, waterproofing layers (paints, coatings, etc.) have the problem of high cost while lacking structural performance.

Therefore, as mentioned above, if a mixture with excellent elasticity and a mixture with high toughness and tensile strength and high adhesion function are applied, an asphalt pavement that demonstrates both structural performance and durability can be created, and thus can withstand excessive traffic loads. As it is an asphalt pavement with excellent durability and features, it not only facilitates construction but also allows rapid opening to traffic.

Meanwhile, as a prior art related to the above-described technology, Korean Patent Publication No. 10-2016-0106070 discloses a polymer-modified asphalt concrete composition and a method of manufacturing polymer-modified asphalt concrete using the same.

The present invention was created to overcome the problems described above, and has good crack resistance, high fluidity resistance, and/or durability, and prevents water penetration and potholes while not easily causing plastic deformation, aging, and/or peeling. The object is to provide a modified asphalt concrete composition that can be used.

This invention

Based on 100 parts by weight of asphalt,

1 to 30 parts by weight of styrene-isoprene styrene;

1 to 30 parts by weight of styrene butadiene styrene;

1 to 30 parts by weight of petroleum resin;

800 to 1,500 parts by weight of aggregate;

0.1 to 5 parts by weight of a performance improver;

0.1 to 5 parts by weight of nanoceramic particles;

0.1 to 5 parts by weight of compatibilizer;

0.1 to 5 parts by weight of vegetable oil;

0.1 to 5 parts by weight of cellulose fiber; and

Provided is a modified asphalt concrete composition with improved crack resistance containing 0.1 to 5 parts by weight of an antioxidant.

In addition, the present invention

A cleaning step of organizing the surface to be constructed;

Based on 100 parts by weight of asphalt, 1 to 30 parts by weight of styrene isoprene styrene, 1 to 30 parts by weight of styrene butadiene styrene, 1 to 30 parts by weight of petroleum resin, 800 to 1,500 parts by weight of aggregate, 0.1 to 5 parts by weight of performance improver, nanoceramic A modified asphalt concrete composition with improved crack resistance comprising 0.1 to 5 parts by weight of particles, 0.1 to 5 parts by weight of compatibilizer, 0.1 to 5 parts by weight of vegetable oil, 0.1 to 5 parts by weight of cellulose fiber, and 0.1 to 5 parts by weight of antioxidant. A mixing step of mixing;

A pouring step of transporting the mixed modified asphalt concrete composition with improved crack resistance by a moving means and pouring it on the target surface where the preparation step has been completed;

A compaction step of compaction after the pouring step is completed; and

A method of constructing a modified asphalt concrete composition with improved crack resistance is provided, including a curing step of curing after the compaction step is completed.

The modified asphalt concrete composition with improved crack resistance according to the present invention has good crack resistance, high fluidity resistance, and/or durability, and does not easily cause plastic deformation, aging, and/or peeling, and prevents water penetration and potholes, It has the effect of allowing the pouring process to be easily performed at low cost.

Hereinafter, the present invention will be described in detail.

In one aspect, the present invention includes 1 to 30 parts by weight of styrene isoprene styrene, based on 100 parts by weight of asphalt; 1 to 30 parts by weight of styrene butadiene styrene; 1 to 30 parts by weight of petroleum resin; 800 to 1,500 parts by weight of aggregate; 0.1 to 5 parts by weight of a performance improver; 0.1 to 5 parts by weight of nanoceramic particles; 0.1 to 5 parts by weight of compatibilizer; 0.1 to 5 parts by weight of vegetable oil; 0.1 to 5 parts by weight of cellulose fiber; and 0.1 to 5 parts by weight of an antioxidant. It provides a modified asphalt concrete composition with improved crack resistance.

From another perspective, the present invention includes a cleaning step of organizing the surface to be constructed; Based on 100 parts by weight of asphalt, 1 to 30 parts by weight of styrene isoprene styrene, 1 to 30 parts by weight of styrene butadiene styrene, 1 to 30 parts by weight of petroleum resin, 800 to 1,500 parts by weight of aggregate, 0.1 to 5 parts by weight of performance improver, nanoceramic A modified asphalt concrete composition with improved crack resistance comprising 0.1 to 5 parts by weight of particles, 0.1 to 5 parts by weight of compatibilizer, 0.1 to 5 parts by weight of vegetable oil, 0.1 to 5 parts by weight of cellulose fiber, and 0.1 to 5 parts by weight of antioxidant. A mixing step of mixing; A pouring step of transporting the mixed modified asphalt concrete composition with improved crack resistance by a moving means and pouring it on the target surface where the preparation step has been completed; A compaction step of compaction after the pouring step is completed; And it provides a construction method of a modified asphalt concrete composition with improved crack resistance, including a curing step of curing after the compaction step is completed.

The asphalt according to the present invention is not particularly limited as long as it is an asphalt commonly used in the art, but it is recommended that petroleum-based asphalt such as straight asphalt can be used.

Here, the straight asphalt is a normal asphalt obtained by refining the residue obtained by drying or distilling the raw material as petroleum asphalt. In particular, those with a penetration degree of 60 to 80 are better because they are easier to construct on roads.

The content of the remaining components other than asphalt constituting the modified asphalt concrete composition according to the present invention, specifically the modified asphalt concrete composition with improved crack resistance, is based on 100 parts by weight of asphalt.

Stylene isoprene stylene (SIS) according to the present invention suppresses the occurrence of cracks in modified asphalt concrete compositions, specifically modified asphalt concrete compositions with improved crack resistance, prevents potholes, and provides cohesive strength. At the same time, it improves strength.

The preferred styrene isoprene styrene is styrene isoprene styrene with an elongation of 320 to 1,400%. The amount of styrene isoprene styrene can be changed depending on the user's choice, but it is recommended to use 1 to 30 parts by weight based on 100 parts by weight of asphalt. It is desirable.

Styrene butadiene stylene (SBS) according to the present invention, like the styrene isoprene styrene, not only suppresses the occurrence of cracks in the modified asphalt concrete composition and prevents potholes, but also provides cohesive strength to asphalt and improves strength. I order it.

The preferred styrene butadiene styrene is styrene butadiene styrene with an elongation of 320 to 1,400%, and its usage is recommended to be 1 to 30 parts by weight based on 100 parts by weight of asphalt.

The petroleum resin according to the present invention is intended to provide high adhesion to the modified asphalt concrete composition, and for this purpose, a petroleum resin commonly used in the industry, preferably an aromatic petroleum resin, an aliphatic petroleum resin, or a mixture thereof. Can be used, and particularly preferably, a petroleum resin with a melt temperature of 100°C or higher, a penetration of 1/10 mm or less, and a viscosity of 50 to 500 cps at 140°C (hereinafter referred to as 140°C viscosity) is suitable, but it is recommended that the melt A petroleum resin with a temperature of 110℃ to 140℃, a penetration degree of 0.5 to 3, and a viscosity of 50 to 300cps at 140℃ is preferred, but it is more recommended to use an aliphatic C-5 petroleum resin with a viscosity of 100 to 150cps. .

The preferred amount of petroleum resin used is not particularly limited, but it is recommended to be 1 to 30 parts by weight based on 100 parts by weight of asphalt.

The aggregate according to the present invention is agglomerated into a lump by the modified asphalt concrete composition, specifically the components of the modified asphalt concrete composition with improved crack resistance, such as asphalt, styrene isoprene styrene, styrene butadiene styrene, petroleum resin, etc. It is a mineral material for construction and is chemically stable.

The aggregate refers to granite, limestone, sand, gravel, basalt, rubble, bazalt, vermiculite, or a mixture of at least one or more selected from these, or other similar materials.

Specifically, the aggregate may further include basic vein rock with a particle size of about 13 mm and a water absorption of about 0.7% and/or bauxite with a particle size of about 5 mm and a water absorption of about 0.7%.

Depending on the size of the aggregate, those smaller than 5 mm are called fine aggregates, and those larger than 5 mm are called coarse aggregates. The preferred amount of aggregate used is 800 to 1,500 parts by weight based on 100 parts by weight of asphalt, and the mixing amount of fine aggregate and coarse aggregate included in the aggregate is not particularly limited, so it can be adjusted appropriately as needed. An example of a preferable aggregate is aggregate. Aggregate is a mixture of coarse aggregate of number 7 (13mm~5mm), fine aggregate of particle size number 4 (75% of 2.5mm passage), and filler (85% of 0.08mm passage) in a weight ratio of 55:43:2. It is recommended to use.

The performance improver according to the present invention may be any performance improver commonly used in the industry, specifically any asphalt performance improver, and the amount used is preferably 0.1 to 5 parts by weight based on 100 parts by weight of asphalt.

Preferred performance improvers include 90 to 99.5% by weight of vinyl acetate monomer-paraffin oil and 0.5 to 10% by weight of benzoyl peroxide based on the total weight of the performance improver.

Here, the vinyl acetate monomer-paraffin oil is preferably a mixture of 5 to 25% by weight of vinyl acetate monomer and 75 to 95% by weight of paraffin oil.

The nanoceramic particles according to the present invention rise to the surface during curing of the modified asphalt concrete composition to form a dense and high hardness surface, thereby improving moisture resistance, durability, weather resistance, impact resistance, and chemical resistance.

The amount of nanoceramic particles used is preferably 0.1 to 5 parts by weight based on 100 parts by weight of asphalt.

Preferred nanoceramic particles include silicon carbide, alumina, silica, zirconia-silica, ZnO, TiO ₂ and/or CaCO ₃ .

These ceramic particles preferably have an average particle size in the nano range. Specifically, the average particle size of the silicon carbide is 300 to 500 nm, the average particle size of the alumina is 500 to 1000 nm, the average particle size of the silica is 700 to 1500 nm, and the zirconia- It is preferable that the average particle diameter of silica is 500 to 1000 nm, the average particle diameter of ZnO is 500 to 1000 nm, the average particle diameter of TiO2 is 100 to 300 nm, and the average particle diameter of CaCO ₃ is 500 to 1000 nm.

Among these, silicon carbide does not exist as a natural mineral, so it is artificially synthesized, has excellent chemical stability and corrosion resistance at high temperatures, and has high hardness.

The compatibilizer according to the present invention is intended to increase compatibility between the modified asphalt concrete composition, specifically the asphalt, etc. contained in the modified asphalt concrete composition with improved crack resistance, etc., and the performance improver.

Preferred compatibilizers include polyphosphoric acid, metal salt inorganic acids, or mixtures thereof, and it is recommended to use 0.1 to 5 parts by weight based on 100 parts by weight of asphalt.

The vegetable oil according to the present invention is intended to facilitate work by reducing the viscosity of the modified asphalt concrete composition and to improve durability against cracks, etc., and any vegetable oil common in the art for this purpose may be used. However, it is preferable to use perilla oil, sesame oil, soybean oil, cooking oil, sunflower oil, or at least one mixture selected from these, and more preferably, it is recommended to use sunflower oil, and the amount used is based on 100 parts by weight of asphalt. It is recommended that it is 0.1 to 5 parts by weight.

The cellulose fiber according to the present invention is intended to provide tensile strength and/or lightness due to stress applied in the longitudinal-lateral direction of the construction surface formed of the modified asphalt concrete composition, and any cellulose fiber having this purpose can be used. However, it is preferable to use natural cellulose fibers, and the amount used is 0.1 to 5 parts by weight based on 100 parts by weight of asphalt.

The antioxidant according to the present invention is used to prevent oxidation of the modified asphalt concrete composition.

Preferred antioxidants are amine-based, bisphenol-based, monophenol-based and sulfur-based antioxidants, preferably 2.2-methylenebis(4-methyl-6-t-butylphenol) [2. 2 - M e t h y l e n e b i s ( 4 - m e t h y l - 6 - t - b u t y l p h e n o l )], 2.6-di-t-Butyl-4-methylphenol (2.6-di-t-Butyl-4-methylphenol), or mixtures thereof may be used. , the amount used is preferably 0.1 to 5 parts by weight based on 100 parts by weight of asphalt.

The modified asphalt concrete composition according to the present invention, specifically the modified asphalt concrete composition with improved crack resistance, may further include one or more types of additives implemented in the following specific embodiments.

In a specific embodiment, the modified asphalt concrete composition according to the present invention, specifically the modified asphalt concrete composition with improved crack resistance, is dissolved in sulfuric acid in order to realize the excellent strength performance, wet hardening performance, performance recovery performance, crack inhibition performance, and high durability of the composition. Magnesium may be further included in an amount of 1 to 5 parts by weight based on 100 parts by weight of asphalt. If the content of magnesium sulfate is less than 1 part by weight based on 100 parts by weight of asphalt, the improvement effect is minimal, and if it exceeds 5 parts by weight, Workability is not good due to excessive cost.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of calcite powder based on 100 parts by weight of asphalt in order to improve the heat resistance, wear resistance, chemical resistance, and/or hardness of the composition. Calcite has the property of being insoluble in pure water, and can also serve as a buffer in an acidic environment, and its preferred average particle size is 1 to 5㎛.

In another specific embodiment, the modified asphalt concrete composition according to the present invention uses polyvinylidene fluoride resin to improve cracking and dropping phenomenon even when the composition rapidly hardens, and to provide processability, adhesion, and stability of the composition. It may further be included in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of asphalt.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 0.1 to 3 parts by weight of trimethylolpropane triacrylate based on 100 parts by weight of asphalt in order to improve the hardness of the composition and reduce surface contamination. .

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 0.1 to 5 parts by weight of polyoxyethylene nonylphenyl ether based on 100 parts by weight of asphalt in order to improve dispersibility and improve the stability and workability of the material. You can.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 0.1 to 2 parts by weight of nickel slag powder based on 100 parts by weight of asphalt in order to improve the heat resistance and acid resistance of the composition. The nickel slag powder is The nickel slag powder is made by pulverizing nickel slag, an industrial by-product generated during the nickel smelting process, and contains 30 to 35% by weight of MgO. This component has stability against heat and acid, so the above effects can be obtained. The average particle size of the preferred nickel slag powder is 1 to 3㎛.

In another specific embodiment, the modified asphalt concrete composition according to the present invention contains 0.1 to 3 parts by weight of diisononyl phthalate (Di-Isononyl) based on 100 parts by weight of asphalt in order to improve the heat resistance, elastic recovery, and wrinkle resistance of the composition. Phthalate, (DINP)) may be further included.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include tocopheryl acetate in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of asphalt in order to improve the antibacterial and anti-oxidation effects of the composition. .

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of styrene-butadiene resin based on 100 parts by weight of asphalt in order to improve the fluidity of the composition and improve the dispersibility and compressive strength. You can.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of a boric acid compound based on 100 parts by weight of asphalt in order to improve water resistance and scratch resistance, and the boric acid compound includes Examples include orthoboric acid, metaboric acid, tetraboric acid, methyl borate, and ethyl borate, and orthoboric acid is preferably used.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 10 parts by weight of acetylated dranolan based on 100 parts by weight of asphalt in order to improve the water resistance, heat resistance, salt resistance, and adhesiveness of the composition. You can.

In another specific embodiment, the modified asphalt concrete composition according to the present invention further contains 1 to 5 parts by weight of imidazoline betaine based on 100 parts by weight of asphalt in order to improve the material separation resistance, workability, and freeze-thaw durability of the composition. can do.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of sericite based on 100 parts by weight of asphalt in order to improve the wear resistance, fire resistance, water resistance, and deodorization of the composition. The sericite is a mineral belonging to the monoclinic system and has excellent stability, lubricity, moisture retention, etc., so when it is included in a modified asphalt concrete composition, it has the above-mentioned effects.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of zinc chromate based on 100 parts by weight of asphalt in order to improve the strength, corrosion resistance, and durability of the composition. , if the content exceeds 5 parts by weight based on 100 parts by weight of asphalt, strength, corrosion resistance and durability are improved, but workability deteriorates, and if the content is less than 1 part by weight, separation of materials occurs, which is not good.

In another specific embodiment, the modified asphalt concrete composition according to the present invention further contains 1 to 5 parts by weight of polytrimethylene terephthalate based on 100 parts by weight of asphalt in order to improve the flexibility, elasticity, elasticity, and ultraviolet ray resistance of the composition. can do.

In another specific embodiment, the modified asphalt concrete composition according to the present invention further includes 1 to 5 parts by weight of gamma-aminopropyltriethoxysilane based on 100 parts by weight of asphalt in order to prevent deterioration, durability, and improve curability of the composition. can do.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of dibutylhydroxytoluene based on 100 parts by weight of asphalt to prevent rancidity and aging and improve stability of the composition.

In another specific embodiment, the modified asphalt concrete composition according to the present invention prevents oxidation of the composition, provides rapid curing characteristics, effectively prevents material separation and material loss, and has wet hardening performance, crack suppression performance, and shrinkage resistance. In order to improve performance, 0.1 to 2 parts by weight of shungite fine powder may be further included based on 100 parts by weight of asphalt. Shungite is a mineral whose main components are silicate and fullerene and is known to have excellent antioxidant ability. It is used as modified asphalt. When included in a concrete composition, the above-mentioned effects can be obtained, and the average particle size of the preferred fine powder of Sunjit is 1 to 5㎛.

In another specific embodiment, the modified asphalt concrete composition according to the present invention contains 1 to 3 parts by weight of diaminodiphenyl based on 100 parts by weight of asphalt in order to improve the durability of the composition's cohesion, water resistance, freeze-thaw, and resistance to salt damage. It may further include sulfone, wherein diaminodiphenylsulfone is 3,3'-diaminodiphenylsulfone, 3,4'-diaminodiphenylsulfone, 4,4'-diaminodiphenylsulfone, and these One or more types selected from the group consisting of mixtures may be used.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of sodium magnesium silicate based on 100 parts by weight of asphalt in order to control the viscosity of the composition and improve workability and hygroscopicity. there is.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of potassium magnesium titanate based on 100 parts by weight of asphalt in order to improve the waterproofing, watertightness, acid resistance and neutralization resistance of the composition. The potassium magnesium titanate is obtained by mixing a titanium oxide source, a potassium oxide source, and a magnesium oxide source in a weight ratio of 70 to 80:15 to 25:5 to 15, melted at a temperature of 1300 to 1500°C, and after cooling, the average particle diameter is The above-mentioned effect can be further improved by using a product manufactured by grinding to 1 to 30 μm.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of ammonium phosphate based on 100 parts by weight of asphalt to provide flame retardancy to the composition and prevent patina.

In another specific embodiment, the modified asphalt concrete composition according to the present invention can further use 0.1 to 3 parts by weight of gallium nitride (GaN) fine powder based on 100 parts by weight of asphalt in order to reduce cracking and improve wear resistance, salt resistance, etc. of the composition. The preferred average particle size of gallium nitride is 1 to 5㎛.

In another specific embodiment, the modified asphalt concrete composition according to the present invention contains 0.1 to 3 parts by weight of polyoxyethylene-polyoxypropylene glycol (polyoxyethylene) based on 100 parts by weight of asphalt to provide durability, impact resistance, and bonding strength of the composition. -polyoxypropylene block polymer) may be further included.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of acrylonitrile based on 100 parts by weight of asphalt in order to improve the strength, elongation and durability of the composition.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of polychlorotrifluoroethylene based on 100 parts by weight of asphalt in order to improve the strength, impact resistance, and chemical resistance of the composition. there is.

In another specific embodiment, the modified asphalt concrete composition according to the present invention further includes 1 to 3 parts by weight of polyester polyol based on 100 parts by weight of asphalt in order to improve the tensile strength, wear resistance, elasticity, oil resistance, heat resistance, etc. of the composition. can do.

Here, if the content of the polyester polyol exceeds 3 parts by weight, performance is improved, but the viscosity increases and workability is reduced, and if the content is less than 1 part by weight, workability is improved, but tensile strength, abrasion resistance, elasticity, oil resistance, and heat resistance are improved. The effect becomes weaker.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of gluconolactone based on 100 parts by weight of asphalt to prevent aging, prevent peeling, and improve crack resistance of the composition. there is.

In another specific embodiment, the modified asphalt concrete composition according to the present invention contains distearyl pentaerythritol to prevent the composition from being decomposed by an oxidation reaction and losing its intrinsic properties by suppressing or blocking the chemical reaction due to contact with oxygen. Diphosphate (Distearyl pentaerythritol diphosphite) may be further included in an amount of 1 to 5 parts by weight based on 100 parts by weight of asphalt.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 10 parts by weight of guar gum based on 100 parts by weight of asphalt.

Here, the guar gum is a natural resin that is a water-soluble polymer material, and voids are generated due to the interaction between expansion due to hydration reaction, contraction due to dehydration, and expansion action when the composition solidifies due to hydration reaction, and these voids and natural Guar gum, a resin, can exhibit shock absorption due to its inherent elasticity.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of itaconic acid based on 100 parts by weight of asphalt in order to maintain the dispersibility and fluidity of the composition for a certain period of time. .

In another specific embodiment, in order to improve the plasticity and molding processability of the modified asphalt concrete composition according to the present invention, ethylene bis stearamide may be further included in an amount of 1 to 10 parts by weight based on 100 parts by weight of asphalt. .

In another specific embodiment, the modified asphalt concrete composition according to the present invention is oxidized and discolored when the composition is exposed to air, light, and moisture, thereby damaging the appearance as well as preventing a rapid decrease in the physical properties of the composition. It may further include 1 to 5 parts by weight of red copper ions based on 100 parts by weight of asphalt. Since red copper ions are a secondary mineral produced by weathering of copper sulfide minerals and easy for copper ions to elute, the eluted copper ions are absorbed by microorganisms or When in contact with a virus, it binds to enzymes or proteins and reduces their activity, thereby lowering the metabolic function of microorganisms and viruses, and activating oxygen in the air through the catalytic action of eluted copper ions, which has the effect of decomposing organic matter of microorganisms and viruses. there is.

In another specific embodiment, the modified asphalt concrete composition according to the present invention improves the durability, wear resistance, and strength of the composition, and effectively prevents defects such as lifting or peeling even after a long period of time, by adding 1 to 1 to 100 parts by weight of asphalt. It may further include 5 parts by weight of zinc phosphate (Zn ₃ (PO ₄ ) ₂ ).

In another specific embodiment, in order to impart an antibacterial effect to the modified asphalt concrete composition according to the present invention and to remove heavy metals contained in the modified asphalt concrete composition, carboxymethyl chitosan (carboxymethyl chitosan) is added in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of asphalt. It may further be included in parts by weight. The carboxymethyl chitosan is a chitosan derivative and is usually extracted from the shells of crustaceans such as crabs and shrimp.

In another specific embodiment, in order to improve the excellent surface hardness, chemical resistance, and contamination resistance of the modified asphalt concrete composition according to the present invention, 5 to 15 parts by weight of tetrafluoroethylene hexafluoropropylene copolymer (FEP) based on 100 parts by weight of asphalt ) may further be included.

In another specific embodiment, the modified asphalt concrete composition according to the present invention contains 1 to 10 parts by weight of 2-bromopyridine (2- bromopyridine) may be further included.

In another specific embodiment, in order to lubricate the components constituting the modified asphalt concrete composition according to the present invention and prevent a high viscosity increase at high temperatures, it may further include 1 to 5 parts by weight of polyethylene wax based on 100 parts by weight of asphalt. You can.

In another specific aspect, the modified asphalt concrete composition according to the present invention not only increases the weather resistance and adsorption capacity of the composition, absorbs carbon dioxide floating in the air, purifies the air and stably absorbs ultraviolet rays, but also acts as a binder. In order to do this, 1 to 10 parts by weight of a mixture of sodium silicate and silica sand mixed at a weight ratio of 1:1 may be further included based on 100 parts by weight of asphalt.

Here, using a mixture of sodium silicate and silica sand in a weight ratio of 1:1 allows the silica sand to act as a binder, and sodium silicate acts as a ceramic binder to increase weather resistance and adsorption power, and to increase air absorption. This is to provide an air purifying effect by absorbing carbon dioxide floating in the air and an effective ultraviolet ray stabilizer that absorbs the entire ultraviolet ray wavelength range and the entire visible ray wavelength range.

In another specific embodiment, the modified asphalt concrete composition according to the present invention contains germanium oxide at 1 part by weight based on 100 parts by weight of asphalt in order to improve the long-term strength of the composition, resistance to freeze-thaw and salt damage, improvement in shrinkage resistance, and incombustibility. It may further include from 5 to 5 parts by weight.

In another specific embodiment, the modified asphalt concrete composition according to the present invention improves the adhesion, cohesion, and material separation prevention of the composition, and improves physical performance such as shrinkage resistance, adhesion strength, bending strength, tensile strength, and compressive strength. For this purpose, 1 to 5 parts by weight of aminomethyl polystyrene resin may be further included based on 100 parts by weight of asphalt.

In another specific embodiment, the modified asphalt concrete composition according to the present invention further contains 1 to 3 parts by weight of glycidyl methacrylate based on 100 parts by weight of asphalt in order to improve the fluidity, waterproofness, water resistance, chemical resistance, etc. of the composition. can do.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of molybdenum disulfide based on 100 parts by weight of asphalt in order to improve the strength, wear resistance, crack reduction effect, etc. of the composition.

In another specific embodiment, the modified asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of Gongyorin based on 100 parts by weight of asphalt in order to improve the adsorption capacity, deodorization, heat resistance, etc. of the composition. Calcium carbonate obtained by firing oyster shells is the main ingredient, and the above effect is further improved by using raw oyster shells made by baking and pulverizing raw oyster shells at a temperature of 700 to 900 ° C for 1 to 2 hours, followed by hydration and carbonation reaction. You can do it.

In another specific embodiment, the modified asphalt concrete composition according to the present invention develops strength by improving the reactivity of the composition, and contains sodium metaphosphate based on 100 parts by weight of asphalt to improve contamination resistance and material separation resistance. It may further be included in an amount of 0.1 to 3 parts by weight.

In another specific embodiment, the modified asphalt concrete composition according to the present invention contains 1 to 5 parts by weight of aluminum silicate based on 100 parts by weight of asphalt to improve fire resistance and fillability by improving the thermal and chemical stability of the composition. It can be included.

In another specific embodiment, the modified asphalt concrete composition according to the present invention contains 0.1 to 2 parts by weight of dicyclohexylammonium 2 based on 100 parts by weight of asphalt to improve the adhesive strength properties, wear resistance, contamination resistance, chemical resistance, and weather resistance of the composition. -May further contain cyanoacrylate.

The construction method using the modified asphalt concrete composition according to the present invention having the above configuration, specifically the modified asphalt concrete composition with improved crack resistance, will be described as follows.

A cleaning step of organizing the surface to be constructed using the modified asphalt concrete composition according to the present invention;

Based on 100 parts by weight of asphalt, 1 to 30 parts by weight of styrene isoprene styrene, 1 to 30 parts by weight of styrene butadiene styrene, 1 to 30 parts by weight of petroleum resin, 800 to 1,500 parts by weight of aggregate, 0.1 to 5 parts by weight of performance improver, nanoceramic A modified asphalt concrete composition with improved crack resistance comprising 0.1 to 5 parts by weight of particles, 0.1 to 5 parts by weight of compatibilizer, 0.1 to 5 parts by weight of vegetable oil, 0.1 to 5 parts by weight of cellulose fiber, and 0.1 to 5 parts by weight of antioxidant. A mixing step of mixing;

A pouring step of transporting the mixed modified asphalt concrete composition with improved crack resistance by a moving means and pouring it on the target surface where the preparation step has been completed;

A compaction step of compaction after the pouring step is completed; and

It includes a curing step of curing after the compaction step is completed.

Here, the means of transportation in the pouring step may be any conventional means of transportation in the art, for example, ready-mixed concrete or a dump truck.

Hereinafter, the present invention will be described in detail through examples. However, the following examples are only for illustrating the present invention in detail and do not limit the scope of the present invention by these examples.

[Example 1]

100 g of straight asphalt with a penetration degree of 70, 15 g of styrene isoprene styrene with an elongation of about 850%, 15 g of styrene butadiene styrene with an elongation of about 850%, 15 g of aliphatic C-5 petroleum resin with a viscosity of about 120 cps at 140°C, aggregate number 7 ( Vinyl acetate, 1,100g of aggregate mixed with coarse aggregate of 13mm~5mm, fine aggregate of grain size No. 4 (75% of 2.5mm passage), and filler (85% of 0.08mm passage) in a weight ratio of 55:43:2. Monomer - 3g of performance improver containing 95% by weight of paraffin oil and 5% by weight of benzoyl peroxide, 3g of silicon carbide with an average particle diameter of about 400nm, 3g of polyphosphoric acid, 3g of sunflower oil, 3g of natural cellulose fiber, and 2.2-methylenebis (4 A modified asphalt concrete composition with improved crack resistance was prepared by mixing 2g of -methyl-6-t-butylphenol).

[Example 2]

This was carried out in the same manner as Example 1, but with the addition of 3 g of magnesium sulfate.

[Example 3]

The same method as Example 1 was performed, except that 2 g of calcite powder with an average particle size of 3 ㎛ was additionally added.

[Example 4]

The same method as Example 1 was performed, except that 1 g of polyvinylidene fluoride resin was additionally added.

[Example 5]

The same method as Example 1 was performed, except that 1 g of trimethylolpropane triacrylate was additionally added.

[Example 6]

The same method as Example 1 was performed, except that 2 g of polyoxyethylenenonylphenyl ether was additionally added.

[Example 7]

The same method as Example 1 was performed, except that 1 g of nickel slag powder with an average particle size of 2 μm was added.

[Example 8]

The same method as Example 1 was performed, except that 2 g of diisononyl phthalate was additionally added.

[Example 9]

The same method as Example 1 was performed, except that 1 g of tocopheryl acetate was additionally added.

[Example 10]

This was carried out in the same manner as Example 1, but with the addition of 2 g of styrene-butadiene resin.

[Example 11]

The same method as Example 1 was performed, except that 2 g of orthoboric acid was additionally added.

[Example 12]

The same method as Example 1 was performed, except that 3 g of acetylated dranolan was added.

[Example 13]

The same method as Example 1 was performed, except that 2 g of imidazoline betaine was additionally added.

[Example 14]

This was carried out in the same manner as Example 1, but with the addition of 2g of sericite.

[Example 15]

This was carried out in the same manner as Example 1, but with the addition of 3 g of zinc chromate.

[Example 16]

The same method as Example 1 was performed, except that 2 g of polytrimethylene terephthalate was additionally added.

[Example 17]

The same method as Example 1 was performed, except that 2 g of gamma-aminopropyltriethoxysilane was additionally added.

[Example 18]

The same method as Example 1 was performed, except that 2 g of dibutylhydroxytoluene was additionally added.

[Example 19]

This was carried out in the same manner as in Example 1, but with the addition of 1 g of Sunjit fine powder with an average particle size of 3㎛.

[Example 20]

The same method as Example 1 was performed, except that 2 g of 3,3'-diaminodiphenylsulfone was added.

[Example 21]

The same method as Example 1 was performed, except that 2 g of sodium magnesium silicate was added.

[Example 22]

The same method as Example 1 was performed, except that 3 g of potassium magnesium titanate was additionally added.

[Example 23]

The same method as Example 1 was performed, except that 2 g of ammonium phosphate was added.

[Example 24]

The same method as Example 1 was performed, except that 2 g of gallium nitride fine powder with an average particle size of 3 μm was added.

[Example 25]

The same method as Example 1 was performed, except that 2 g of polyoxyethylene-polyoxypropylene glycol was added.

[Example 26]

The same method as Example 1 was performed, except that 2 g of acrylonitrile was added.

[Example 27]

The same method as Example 1 was performed, except that 2 g of polychlorotrifluoroethylene was additionally added.

[Example 28]

This was carried out in the same manner as Example 1, but with the addition of 1 g of polyester polyol.

[Example 29]

This was carried out in the same manner as in Example 1, but with the addition of 2 g of gluconolactone.

[Example 30]

The same method as Example 1 was performed, except that 3 g of distearyl pentaerythritol diphosphate was added.

[Example 31]

The same method as Example 1 was performed, except that 3 g of guar gum was added.

[Example 32]

This was carried out in the same manner as Example 1, but with the addition of 3 g of itaconic acid.

[Example 33]

The same method as Example 1 was performed, except that 3 g of ethylene bisstamide was added.

[Example 34]

This was carried out in the same manner as Example 1, but with the addition of 2 g of red copper stone.

[Example 35]

This was carried out in the same manner as Example 1, but with the addition of 2 g of zinc phosphate.

[Example 36]

The same method as Example 1 was performed, except that 2 g of carboxymethyl chitosan was added.

[Example 37]

The same method as Example 1 was performed, except that 10 g of tetrafluoroethylene hexafluoropropylene copolymer was added.

[Example 38]

This was carried out in the same manner as Example 1, but with the addition of 5 g of 2-bromopyridine.

[Example 39]

The same method as Example 1 was performed, except that 3 g of polyethylene wax was additionally added.

[Example 40]

This was carried out in the same manner as in Example 1, except that 5 g of a mixture of sodium silicate and silica sand mixed at a weight ratio of 1:1 was added.

[Example 41]

This was carried out in the same manner as Example 1, but with the addition of 2 g of germanium oxide.

[Example 42]

This was carried out in the same manner as Example 1, but with the addition of 2 g of aminomethylpolystyrene resin.

[Example 43]

This was carried out in the same manner as Example 1, but with the addition of 2 g of glycidyl methacrylate.

[Example 44]

This was carried out in the same manner as in Example 1, but with the addition of 3 g of molybdenum disulfide.

[Example 45]

This was carried out in the same manner as Example 1, but with the additional addition of 3 g of Gyeongyorin.

[Example 46]

This was carried out in the same manner as in Example 1, but with the addition of 2 g of sodium metaphosphate.

[Example 47]

This was carried out in the same manner as in Example 1, but with the addition of 2 g of aluminum silicate.

[Example 48]

The same method as Example 1 was performed, except that 1 g of dicyclohexylammonium 2-cyanoacrylate was added.

[Example 49]

This was carried out in the same manner as Example 1, except that all the additives added according to Examples 2 to 48 were added.

[Experiment]

After manufacturing an asphalt concrete layer with a thickness of about 62 mm using the composition prepared according to the examples, porosity, water resistance, cracking resistance, indirect tensile strength, and strain strength were measured, and an asphalt layer with a thickness of about 50 mm was manufactured and the dynamic Stability, etc. were measured and shown in Table 1.

Here, the plastic deformation resistance was measured through the strain strength test and dynamic stability test using the Kim Test, and the indirect tensile strength was conducted to evaluate crack resistance.

porosity waterproof degree of crack Dynamic stability
(pass/mm) Indirect tensile strength
(ITS) strain strength
(Mpa) Example 1 1.7% 99% doesn't exist 3846 1.07 5.63 Example 2 2.6% 99% doesn't exist 4064 1.06 5.85 Example 3 2.5% 99% doesn't exist 4063 0.98 5.93 Example 4 2.8% 99% doesn't exist 3968 0.97 5.82 Example 5 1.8% 98% doesn't exist 4066 1.00 5.95 Example 6 1.9% 98% doesn't exist 3993 1.07 5.83 Example 7 2.1% 99% doesn't exist 3982 1.03 5.83 Example 8 2.7% 99% doesn't exist 4082 1.02 5.90 Example 9 1.7% 99% doesn't exist 4123 1.00 5.92 Example 10 2.5% 99% doesn't exist 3842 1.03 5.63 Example 11 2.3% 99% doesn't exist 3826 1.02 5.65 Example 12 2.1% 99% doesn't exist 3854 1.04 5.74 Example 13 2.4% 98% doesn't exist 3862 1.06 5.66 Example 14 1.6% 99% doesn't exist 4067 1.02 5.73 Example 15 1.8% 98% doesn't exist 3782 0.96 5.56 Example 16 1.6% 98% doesn't exist 3981 1.03 5.74 Example 17 1.7% 99% doesn't exist 4163 1.05 5.86 Example 18 2.5% 98% doesn't exist 3457 0.97 5.12 Example 19 2.2% 99% doesn't exist 4035 1.01 5.89 Example 20 1.7% 99% doesn't exist 3678 1.02 5.48 Example 21 2.1% 99% doesn't exist 3563 1.04 5.27 Example 22 2.4% 99% doesn't exist 3468 1.05 5.29 Example 23 2.5% 99% doesn't exist 3659 1.01 5.55 Example 24 2.3% 99% doesn't exist 3758 1.00 5.37 Example 25 1.6% 98% doesn't exist 3989 1.04 5.56 Example 26 2.4% 99% doesn't exist 3897 0.97 5.45 Example 27 1.7% 99% doesn't exist 3873 0.96 5.47 Example 28 2.2% 98% doesn't exist 3729 1.03 5.35 Example 29 2.0% 99% doesn't exist 3843 1.00 5.44 Example 30 2.5% 99% doesn't exist 3779 0.99 5.36 Example 31 2.3% 99% doesn't exist 3662 0.95 5.34 Example 32 1.8% 99% doesn't exist 3591 0.97 5.14 Example 33 1.8% 98% doesn't exist 3983 0.93 5.46 Example 34 1.9% 98% doesn't exist 3745 0.90 5.35 Example 35 1.6% 99% doesn't exist 3574 0.94 5.66 Example 36 2.1% 99% doesn't exist 3963 1.07 5.65 Example 37 2.0% 99% doesn't exist 3982 0.94 5.62 Example 38 1.9% 99% doesn't exist 3951 1.02 5.56 Example 39 1.8% 98% doesn't exist 3983 1.00 5.64 Example 40 2.4% 99% doesn't exist 3974 1.03 5.73 Example 41 2.3% 99% doesn't exist 3765 1.08 5.31 Example 42 1.6% 99% doesn't exist 3668 1.05 5.30 Example 43 1.8% 99% doesn't exist 4063 0.97 5.78 Example 44 2.4% 98% doesn't exist 4256 1.09 6.03 Example 45 2.5% 99% doesn't exist 3978 1.01 5.65 Example 46 1.7% 99% doesn't exist 3784 1.05 5.53 Example 47 2.4% 99% doesn't exist 3948 1.08 5.56 Example 48 2.7% 99% doesn't exist 3634 0.98 5.33 Example 49 1.7% 98% doesn't exist 3783 0.99 5.44

As shown in Table 1, it can be confirmed that the porosity of the examples using the modified asphalt concrete composition with improved crack resistance is good in the range of 1.5 to 4%, water resistance, dynamic stability, indirect tensile strength and deformation strength are good, and there are no cracks. there was.

As described above, those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, all embodiments described above should be understood as illustrative and not restrictive. The scope of the present invention should be construed as including all changes or modified forms derived from the meaning and scope of the claims described below and their equivalent concepts rather than the detailed description above.

Claims (5)

Based on 100 parts by weight of asphalt,
1 to 30 parts by weight of styrene-isoprene styrene;
1 to 30 parts by weight of styrene butadiene styrene;
1 to 30 parts by weight of petroleum resin;
800 to 1,500 parts by weight of aggregate;
0.1 to 5 parts by weight of a performance improver;
0.1 to 5 parts by weight of nanoceramic particles;
0.1 to 5 parts by weight of compatibilizer;
0.1 to 5 parts by weight of vegetable oil;
0.1 to 5 parts by weight of cellulose fiber; and
A modified asphalt concrete composition with improved crack resistance containing 0.1 to 5 parts by weight of an antioxidant,
Magnesium sulfate is further included in an amount of 1 to 5 parts by weight based on 100 parts by weight of asphalt,
Calcite powder is further included in an amount of 1 to 5 parts by weight based on 100 parts by weight of asphalt,
It further contains 1 to 5 parts by weight of imidazoline betaine based on 100 parts by weight of asphalt,
Ammonium phosphate is further included in an amount of 1 to 3 parts by weight based on 100 parts by weight of asphalt,
It further contains 1 to 5 parts by weight of gluconolactone based on 100 parts by weight of asphalt,
Itaconic acid is further included in an amount of 1 to 5 parts by weight based on 100 parts by weight of asphalt,
Carboxymethyl chitosan is further included in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of asphalt,
A modified asphalt concrete composition with improved crack resistance further comprising 1 to 5 parts by weight of germanium oxide based on 100 parts by weight of asphalt.
delete delete delete A cleaning step of organizing the surface to be constructed;
Based on 100 parts by weight of asphalt, 1 to 30 parts by weight of styrene isoprene styrene, 1 to 30 parts by weight of styrene butadiene styrene, 1 to 30 parts by weight of petroleum resin, 800 to 1,500 parts by weight of aggregate, 0.1 to 5 parts by weight of performance improver, nanoceramic A modified asphalt concrete composition with improved crack resistance containing 0.1 to 5 parts by weight of particles, 0.1 to 5 parts by weight of compatibilizer, 0.1 to 5 parts by weight of vegetable oil, 0.1 to 5 parts by weight of cellulose fiber, and 0.1 to 5 parts by weight of antioxidant. , magnesium sulfate is further included in an amount of 1 to 5 parts by weight based on 100 parts by weight of asphalt, calcite powder is further included in an amount of 1 to 5 parts by weight based on 100 parts by weight of asphalt, and imidazoline betaine is added in an amount of 1 to 5 parts by weight based on 100 parts by weight of asphalt. It further contains 5 parts by weight, ammonium phosphate is further contained in 1 to 3 parts by weight based on 100 parts by weight of asphalt, gluconolactone is further contained in 1 to 5 parts by weight based on 100 parts by weight of asphalt, and itaconic acid is added in 100 parts by weight based on asphalt. It further contains 1 to 5 parts by weight based on parts by weight, carboxymethyl chitosan is further included in 0.1 to 3 parts by weight based on 100 parts by weight of asphalt, and germanium oxide is further included in 1 to 5 parts by weight based on 100 parts by weight of asphalt. A mixing step of mixing a modified asphalt concrete composition with improved resistance;
A pouring step of transporting the mixed modified asphalt concrete composition with improved crack resistance by a moving means and pouring it on the target surface where the preparation step has been completed;
A compaction step of compaction after the pouring step is completed; and
A method of constructing a modified asphalt concrete composition with improved crack resistance, comprising a curing step of curing after the compaction step is completed.