KR102524659B1 - Asphalt Concrete Compositions for Thin Overlay Pavement Comprising Stylene Isoprene Stylene and Constructing Methods Using Thereof - Google Patents

Abstract

The present invention provides an asphalt concrete composition for thin-layer pavement, comprising, 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 a petroleum resin; 800 to 1,500 parts by weight of crushed aggregate; 0.1 to 2 parts by weight of cellulose fiber; 0.1 to 2 parts by weight of an antioxidant; 0.1 to 2 parts by weight of an anti-stripping agent; and 0.1 to 2 parts by weight of a stabilizer. The asphalt concrete composition for thin-layer pavement containing crushed aggregate according to the present invention has good durability and waterproofness and prevents water infiltration and potholes while plastic deformation, aging, and/or peeling may not occur easily, and also, has high resistance to thermal aging and high resistance to flow at high temperatures to make thin-layer construction possible at room temperature or high temperatures.

Description

Asphalt Concrete Compositions for Thin Overlay Pavement Comprising Stylene Isoprene Stylene and Constructing Methods Using Thereof}

The present invention relates to an asphalt concrete composition for thin layer pavement containing crushed aggregate and a construction method using the same, and more particularly, to a surface layer surface to be repaired in order to maintain and repair old roads, concrete structures, etc., which can be laid in a thin layer. It relates to an asphalt concrete composition for thin pavement containing aggregate and a construction method using the same.

In general, bicycle roads are constructed in various ways depending on the ground condition or surrounding conditions of the area where the road is installed, but the surface layer constituting the road surface is generally paved with asphalt concrete or cement concrete.

For example, after compacting the foundation, crushed stone aggregate or concrete is laid to form a base layer, and then asphalt concrete or cement concrete is laid and cured thereon to perform surface layer construction. After that, the construction of the bicycle road pavement was performed by applying a colored epoxy on the surface layer in a spray method to color it.

On the other hand, asphalt is a black or dark brown solid or semi-solid thermoplastic material composed of thousands or more kinds of high molecular hydrocarbons (C-H), including organic compounds and trace amounts of inorganic compounds, in a very complicated manner.

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

In addition, the asphalt is used as a bonding material or adhesive material because it has excellent adhesiveness and excellent adhesion to mineral materials, and is also used as a waterproof material because it is not soluble in water and is impervious, and the viscosity can be changed according to the purpose of use Its application range is diverse and it is used for various purposes such as road pavement, waterproofing, general industrial use, and agricultural use.

Asphalt used for road pavement is petroleum-based asphalt, and straight asphalt with excellent adhesiveness, extensibility, and water absorption is generally used.

On the other hand, as a road pavement method used in road construction, asphalt pavement having a base road bed and a surface layer of 2 to 10 cm in thickness or cement concrete pavement consisting of a road bed and a concrete plate thereon is mainly performed.

In addition, in general, a bridge is a general term for an elevated structure built to pass over the upper part of a river, coast, or road. form a pavement layer.

As the bridge pavement as described above is a part that directly transmits traffic load, it is required to have suitable strength and crack resistance, as well as to have waterproof performance because it is exposed to moisture such as rainwater. It is required to have low chloride ion permeability in order to prevent corrosion of the reinforcing bar by

Korean Patent Registration No. 0641021 discloses waterproof asphalt, which is characterized by including emulsified asphalt and tourmaline.

On the other hand, as such a bridge pavement method, a conventional concrete pavement method or an asphalt pavement method has been known and widely used.

Here, the ascon used in the asphalt pavement is a shortened name for asphalt concrete, and is also referred to as a heated asphalt mixture for paving (KS F 2349 standard), HMA (hot mix asphalt), and the like.

General asphalt concrete is manufactured by mixing asphalt binder, coarse aggregate, sand and/or filler at high temperature, and is widely used as a road pavement material.

In particular, as a general road pavement method, the asphalt concrete road pavement construction method has been mainly implemented.

In such asphalt pavement, plastic deformation sometimes occurs along the driving track before 5 years after construction, causing serious driving problems, or even if there is no plastic deformation problem, the pavement material gradually ages with the passage of time and eventually causes severe cracks. There is a problem that occurs and requires periodic maintenance.

Therefore, in order to minimize the maintenance cost, it is required to develop an asphalt composition that minimizes plastic deformation of a road paved using asphalt concrete, does not age for a long time, and does not easily peel off.

On the other hand, when the bridge pavement of the existing bridge is re-constructed, the existing waterproof coating is damaged due to the cutting of the asphalt, and the waterproof coating and asphalt concrete have to be re-constructed, blocking vehicle traffic for a long time, which hinders vehicle traffic.

In addition, when a crack occurs in the pavement, asphalt sealant is heated and injected to impart adhesiveness and waterproofness to the cracked part, but it does not penetrate into the deep part of the fine crack or void, so the penetration of rainwater reduces durability and wear resistance. there was.

In addition, the existing road surface is not drained, so when it rains, water accumulates on the road surface and when a vehicle passes, the spray obscures the view, causing a traffic accident. When driving on the road, the asphalt melts and the wheels of the car come off, causing a risk of traffic accidents, and a huge cost is required to repair it. had a problem with

In order to solve the above problems, recently, research on the slurry room method, which is a method of paving the road in a thin layer and completing the construction quickly, has been actively conducted, and accordingly, a number of patents related to the slurry room method have been filed.

However, despite the excellent water resistance and high durability of the slurry room method, asphalt for thin pavement suitable for the slurry room method has not been developed due to the imperfection of the modifier added to the slurry room method.

The present invention was created to overcome the above-mentioned problems, has good durability and waterproofness, does not easily cause plastic deformation, aging and / or peeling, and reduces scattering dust and waste through no-cutting and no-heating construction during road maintenance Asphalt concrete composition for thin-layer pavement containing crushed aggregate capable of suppressing occurrence, preventing water penetration and potholes, and having high resistance to heat aging and flow resistance at high temperatures, enabling thin-layer construction at room temperature or high temperature to provide.

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 crushed aggregate;

0.1 to 2 parts by weight of cellulose fibers;

0.1 to 2 parts by weight of an antioxidant;

0.1 to 2 parts by weight of an anti-peeling agent; and

Provided is an asphalt concrete composition for thin pavement containing 0.1 to 2 parts by weight of a stabilizer.

In addition, the present invention

A foreign substance removal-cleaning step of cleaning after removing foreign substances on the surface;

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 crushed aggregate based on 100 parts by weight of asphalt on the surface where the foreign matter removal-cleaning step is completed 0.1 to 2 parts by weight of cellulosic fibers, 0.1 to 2 parts by weight of antioxidant, 0.1 to 2 parts by weight of anti-stripping agent, and 0.1 to 2 parts by weight of stabilizer An asphalt concrete composition for thin-layer paving is poured to thin pavement; and

Provides a method for constructing an asphalt concrete composition for thin pavement comprising a curing step of curing after the pouring step is completed.

The asphalt concrete composition for thin pavement containing crushed aggregate according to the present invention has good durability and waterproofness, does not easily cause plastic deformation, aging and/or peeling, and reduces scattering dust through no-cutting and no-heating construction during road maintenance and It is possible to suppress waste generation, prevent penetration water and potholes, and have high resistance to heat aging and flow resistance at high temperatures, so that thin layer construction is possible at room temperature or high temperature.

Hereinafter, the present invention will be described in detail.

In one aspect, the present invention is 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 crushed aggregate; 0.1 to 2 parts by weight of cellulose fibers; 0.1 to 2 parts by weight of an antioxidant; 0.1 to 2 parts by weight of an anti-peeling agent; And it provides an asphalt concrete composition for thin pavement containing 0.1 to 2 parts by weight of a stabilizer.

In another aspect, the present invention removes foreign substances on the surface and then cleans the foreign matter removal-cleaning step; 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 crushed aggregate based on 100 parts by weight of asphalt on the surface where the foreign matter removal-cleaning step is completed 0.1 to 2 parts by weight of cellulosic fibers, 0.1 to 2 parts by weight of antioxidant, 0.1 to 2 parts by weight of anti-stripping agent, and 0.1 to 2 parts by weight of stabilizer An asphalt concrete composition for thin-layer paving is poured to thin pavement; And it provides a method for constructing an asphalt concrete composition for thin pavement comprising a curing step of curing after the pouring step is completed.

The asphalt concrete composition according to the present invention, specifically the asphalt concrete composition for thin layer pavement, and more specifically, the asphalt concrete composition for thin layer pavement including crushed aggregate is used to maintain roads, bridges, concrete structures, etc., such as old roads, on the surface layer surface. As a composition for enabling laying in a thin layer, it is not particularly limited as long as it is a conventional asphalt concrete composition in the art having this purpose.

Asphalt according to the present invention integrates the bearing capacity of the asphalt concrete composition, specifically, chemical bonding between the aggregate constituting the asphalt concrete composition for thin layer pavement including crushed aggregate and other compositions, and is resistant to deformation and deformation under high temperature in summer and low temperature in winter. It is intended not only to provide bonding strength to improve resistance to cracking, but also to maintain properties after mixing the composition, and any asphalt commonly used in the art for this purpose is not particularly limited, but it is recommended Petroleum-based asphalt or asphalt mixtures such as straight asphalt can be used.

Here, it is recommended to use a natural asphalt mixture as the asphalt mixture.

The asphalt mixture, specifically the natural asphalt mixture, is not particularly limited as long as it is a natural asphalt mixture commonly used in the art, but is preferably straight asphalt, Trinidad lake asphalt, Trinidad epure asphalt or It is preferable to use at least one mixture selected from these, more preferably straight asphalt and natural asphalt having a penetration of 20 to 40, such as Trinidad Lake asphalt and/or Trinidad Epure asphalt mixture. Preferably, it is recommended to use a mixture of 70 to 80% by weight of straight asphalt having a penetration of 20 to 40 and 20 to 30% by weight of natural asphalt composed of Trinidad Lake asphalt or Trinidad Epure asphalt.

Here, the straight asphalt is a conventional asphalt obtained by refining the residue obtained by dry distillation or distillation of a raw material with petroleum asphalt, and in particular, those having a penetration of 20 to 40 are better because of their easy workability.

The straight asphalt is preferably included in an amount of 70 to 80% by weight in the asphalt mixture. If the content is less than 70% by weight, it may take a long time to harden after asphalt pavement, and the softening point may be lowered, and if it exceeds 80% by weight, fluidity may be reduced.

In addition, the natural asphalt serves to improve the fluidity of the asphalt composition of the present invention and to increase deformation resistance, sliding resistance and frictional resistance.

As the natural asphalt, trinidad lake asphalt and/or Trinidad epure asphalt may be used.

The natural asphalt is preferably included in an amount of 20 to 30% by weight in the asphalt mixture, and when the content is less than 20% by weight, the effect of improving fluidity, deformation resistance, slip resistance and friction resistance is insignificant, and exceeds 30% by weight In this case, the asphalt of the present invention may be softened and the softening point may be lowered.

The asphalt concrete composition according to the present invention, specifically the asphalt concrete composition for thin-layer pavement, and more specifically, the asphalt concrete composition for thin-layer pavement including crushed aggregate, constitutes the content of the remaining components other than asphalt based on 100 parts by weight of asphalt.

Styrene isoprene styrene (SIS) according to the present invention suppresses crack generation, prevents potholes, and improves strength while providing cohesive strength to asphalt.

Preferred styrene isoprene styrene is preferably styrene isoprene styrene having an elongation of 320 to 1,400%, and it is recommended that the amount used is 1 to 30 parts by weight based on 100 parts by weight of asphalt.

Styrene butadien styrene (SBS) according to the present invention suppresses the occurrence of cracks in the asphalt concrete composition, provides waterproof performance, and improves strength at the same time.

Preferred styrene butadiene styrene is preferably styrene butadiene styrene having an elongation of 320 to 1,400%, and the amount used can be changed according to the user's choice, but it is recommended to use 1 to 30 parts by weight based on 100 parts by weight of asphalt. .

The petroleum resin according to the present invention is to provide high adhesion to the asphalt concrete composition for thin pavement, and for this purpose, a petroleum resin commonly used in the art, preferably an aromatic petroleum resin, an aliphatic petroleum resin, or a mixture thereof Can be used, and particularly preferably, a petroleum resin having a melting temperature of 100 ° C or more, a penetration of 3 dmm or less, and a viscosity at 140 ° C (hereinafter referred to as 140 ° C viscosity) of 50 to 500 cps is suitable, but it is recommended that the melting temperature is A petroleum resin having a temperature of 110 ° C to 140 ° C, a penetration of 0.5 to 2 dmm, and a viscosity of 50 to 300 cps at 140 ° C is good, but more preferably, an aliphatic C-5 petroleum resin having a viscosity of 100 to 150 cps is used.

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

The crushed aggregate according to the present invention is an asphalt concrete composition, specifically an asphalt concrete composition for thin paving, more specifically a component of an asphalt concrete composition for thin paving including crushed aggregate, such as asphalt, styrene isoprene styrene, styrene butadiene It is a mineral material for construction that can be agglomerated by styrene or petroleum resin to form a lump, and is chemically stable.

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

The preferred size of the crushed aggregate is preferably 5 mm to 8 mm in average particle diameter.

Specifically, the crushed aggregate may further include basic grainstone having a particle size of about 5 mm and a water absorption of about 0.7% and/or bauxite having a particle size of about 5 mm and a water absorption of about 5.40%. Preferably, the amount of crushed aggregate used is 800 to 1,500 parts by weight based on 100 parts by weight of asphalt.

Cellulose fibers according to the present invention are intended to provide tensile strength and / or lightness due to stress applied in the longitudinal-lateral direction of a thin pavement surface formed of an asphalt concrete composition, and are conventional cellulose fibers in the art having this purpose , It is preferable to specifically use natural cellulose fibers, and the amount used is preferably 0.1 to 2 parts by weight based on 100 parts by weight of asphalt.

The antioxidant according to the present invention is to prevent oxidation of the 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, , It is preferable that the amount used is 0.1 to 2 parts by weight based on 100 parts by weight of asphalt.

The anti-stripping agent according to the present invention is to prevent the asphalt concrete composition from being easily peeled off from the construction surface, and any conventional anti-stripping agent in the art for this purpose may be used, but preferably polyphosphoric acid, It is preferable to use an amine-based or phosphoric acid ester-based peeling inhibitor.

Specifically, the anti-stripping agent is a liquid type polyphosphoric acid-based anti-stripping agent having a specific gravity of 1.0 or more and a viscosity of 110 cPs at 60 ° C; It may be an amine-based anti-stripping agent having an acid value of 10 mgKOH/g or less and a total amine value of 140 to 400 mgHCl/g.

It is recommended that the preferred amount of the anti-stripping agent is 0.1 to 2 parts by weight based on 100 parts by weight of asphalt.

The stabilizer according to the present invention is to stably store each component of the asphalt concrete composition for thin layer pavement for a longer period of time, and any stabilizer having this purpose may be used, but preferably pectin, gum arabic, and cara Night gum, tragacan gum, locust bean gum, guar gum, tamarind gum, tara gum, damma gum, agar, carrageenan, alginic acid, xanthan, dextran, glucan, gelatin, casein, cellulose derivatives, or at least one or more selected from these It is preferable to use a mixture, and it is recommended that the amount used is 0.1 to 2 parts by weight based on 100 parts by weight of asphalt.

The asphalt concrete composition according to the present invention, specifically the asphalt concrete composition for thin layer pavement, and more specifically, the asphalt concrete composition for thin layer pavement including crushed aggregate further includes one or more additives implemented in the following specific mode can do.

As a specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of polyvinyl alcohol powder based on 100 parts by weight of asphalt to provide light weight and rigidity.

Here, the polyvinyl alcohol powder includes pores of 0.1 to 10 μm in a range of 0.05 to 0.4 cc/g.

As another specific embodiment, the 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, abrasion resistance, chemical resistance, and hardness of the composition. , Calcite has the property of being insoluble in pure water, and can also act as a buffer against an acidic environment, with a preferred average particle size of 1 to 5 μm.

As another specific aspect, the asphalt concrete composition according to the present invention improves cracking and falling off even when the composition rapidly cures, and polyvinylidene fluoride resin is used as asphalt to provide workability, adhesion and stability of the composition. It may further include 0.1 to 3 parts by weight based on 100 parts by weight.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 0.1 to 3 parts by weight of neopentylglycol (NPG) based on 100 parts by weight of asphalt to prevent shrinkage during hardening of the composition.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of gibbsite based on 100 parts by weight of asphalt to improve strength, wear resistance and fire resistance.

Here, if the amount of the gibbsite used is less than 1 part by weight, the effect of improving performance may be weak, and if the amount of the gibbsite used exceeds 3 parts by weight, workability deteriorates and manufacturing cost increases, making it uneconomical.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 0.1 to 5 parts by weight of cerium based on 100 parts by weight of asphalt to improve strength, fire resistance and corrosion resistance.

As another specific embodiment, the asphalt concrete composition according to the present invention may further include 0.1 to 2 parts by weight of halloysite based on 100 parts by weight of asphalt to improve the strength, fire resistance, wear resistance, and corrosion resistance of the composition. The halloysite is a clay mineral containing aluminum and silicon in a ratio of about 1:1, and when it is included in the composition, the above effects are expressed.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of gelite fine powder based on 100 parts by weight of asphalt in order to develop long-term strength and improve durability of the composition. As a mineral material with an effect of 187 times or more of the above, in addition to the above effect, it also has a high-quality far-infrared ray emission effect, and a preferred average particle size is 1 to 5 μm.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 0.1 to 3 parts by weight of calcium aluminate based on 100 parts by weight of asphalt in order to prevent drying shrinkage of the composition, calcium aluminate is the asphalt concrete composition When included in, it becomes expandable and prevents shrinkage from drying of the composition. If the amount used is less than 0.1 parts by weight based on 100 parts by weight of asphalt, the effect is insignificant, and if it exceeds 3 parts by weight, it will be excessive and reduce workability. can't be good

As another specific embodiment, the asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of sodium metasilicate based on 100 parts by weight of asphalt to improve the compressive strength and flexural strength of the composition, the content of which is asphalt 100 If it is less than 1 part by weight, the fluidity is lowered and irregular bubbles are formed, and if it exceeds 5 parts by weight, it is difficult to secure the curing time, which is not good.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 0.1 to 3 parts by weight of magnesium nitride based on 100 parts by weight of asphalt in order to improve the strength, wear resistance, and durability of the composition.

As another specific embodiment, the asphalt concrete composition according to the present invention further contains 1 to 3 parts by weight based on 100 parts by weight of sodium tripolyphosphate to improve the fluidity of the composition and improve the dispersibility and compressive strength can do.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 5 to 30 parts by weight of modified sulfur based on 100 parts by weight of asphalt in order to improve the curing time and rebound rate of the composition.

Here, the modified sulfur is capable of having radioactivity or a microstructure at room temperature or 135° C., and preferably has a form of a modified sulfur polymer.

Preferred modified sulfur may have a viscosity of 1 to 10 million cP at 135 ° C.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 10 parts by weight of isobutylaldehyde based on 100 parts by weight of asphalt in order to improve polymerization and the like.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of sericite based on 100 parts by weight of asphalt in order to improve strength, waterproofness and durability of the composition.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 10 parts by weight of butyl acrylate based on 100 parts by weight of asphalt in order to improve the bonding property of the composition and prevent cracking.

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

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 10 parts by weight of hafnium based on 100 parts by weight of asphalt in order to improve fire resistance and / or heat resistance of the composition.

As another specific embodiment, the asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight based on 100 parts by weight of sulforaphane in order to maintain discoloration resistance, durability, and crack resistance of the composition. there is.

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

As another specific embodiment, the asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of zirconium based on 100 parts by weight of asphalt in order to enhance corrosion resistance, acid resistance and fire resistance of the composition.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 4 parts by weight of citric acid based on 100 parts by weight of asphalt in order to prevent aggregation of the materials constituting the composition and to secure a certain working time. .

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of lithium hydroxide based on 100 parts by weight of asphalt in order to improve curing reactivity by preventing curing of the composition and organic matter.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of barium sulfate based on 100 parts by weight of asphalt in order to improve the abrasion resistance, durability, filling effect and thickening effect of the composition.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight based on 100 parts by weight of serpentine powder in order to secure the fluidity of the composition and improve fire resistance, acid resistance and durability, The serpentine is a silicate mineral containing magnesium, and the average particle diameter of the serpentine powder is preferably 0.01 to 0.29 mm.

As another specific embodiment, the asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of sodium sulfate based on 100 parts by weight of asphalt in order to control the viscosity of the composition and improve drying properties, the content of which is 100 parts by weight of asphalt When the content exceeds 5 parts by weight, the drying property is improved, but the viscosity is increased and workability is lowered.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of wollastonite based on 100 parts by weight of asphalt to prevent cracking of the composition.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 5 parts by weight of tungsten disulfide (WS ₂ ) based on 100 parts by weight of asphalt to improve the wear resistance and mechanical strength of the composition.

As another specific aspect, the asphalt concrete composition according to the present invention provides fast curing characteristics of the composition to effectively prevent material separation and material loss, and to improve wet hardening performance, crack inhibition performance, and shrinkage resistance performance. Based on 100 parts by weight, it may further include 0.1 to 2 parts by weight of zeolite fine powder, and a preferred average particle size is 1 to 5 μm.

As another specific embodiment, the asphalt concrete composition according to the present invention contains 1 to 3 parts by weight of diaminodiphenylsulfone based on 100 parts by weight of asphalt to improve the durability of the composition's cohesion, water resistance, freeze-thaw, and resistance to salt damage It may further include, at this time, the diaminodiphenyl sulfone is 3,3'-diaminodiphenyl sulfone, 3,4'-diaminodiphenyl sulfone, 4,4'-diaminodiphenyl sulfone and these At least one selected from the group consisting of mixtures may be used.

As another specific aspect, the 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.

As another specific aspect, the 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 to improve the waterproofness, watertightness, acid resistance and neutralization resistance of the composition. Potassium magnesium titanate is obtained by melting a mixture of 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 at a temperature of 1300 to 1500 ° C. After cooling, the average particle size is 1 The above effect can be further improved by using one prepared by grinding to a size of 30 μm to 30 μm.

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

As another specific aspect, the asphalt concrete composition according to the present invention may further include 0.1 to 3 parts by weight of sodium alkylbenzenesulfonate based on 100 parts by weight of asphalt to improve the anticorrosive performance and shrinkage reduction effect of the composition.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 1 to 3 parts by weight of peat based on 100 parts by weight of asphalt to improve the viscosity and adsorption of the composition.

As another specific aspect, the asphalt concrete composition according to the present invention is 1 to 5 parts by weight of asphalt to improve the strength, acid resistance, etc. of the composition, and to neutralize the soil of the construction target surface and promote the effect of decomposing pollutants. It may further include a fine powder of elvan by weight. The elvan belongs to granite diorite porphyry among igneous rocks, and has a fine porous structure with quartz and feldspar densely mixed on a green background. It contains ferric oxide, calcium, magnesium, germanium, selenium, etc., and absorbs, decomposes and removes pollutants, organic substances, germs, etc. It has a function to do so, and the preferred average particle size is 1 to 5 μm.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 0.1 to 3 parts by weight of bauxite fine powder based on 100 parts by weight of asphalt to improve the strength, wear resistance and fire resistance of the composition. is light gray in color and is a mineral containing a lot of aluminum, and preferably has an average particle size of 1 to 5 μm.

As another specific embodiment, the asphalt concrete composition according to the present invention contains 1 to 10 parts by weight of poly based on 100 parts by weight of asphalt to induce excellent thermal stability, fluidity, physical bonding strength and smooth surface formation when the composition is mixed at high temperature. A lactic acid resin may be further included.

At this time, the polylactic acid resin may be any conventional polylactic acid resin in the art, but it is recommended to use poly-D-lactic acid [poly (D-lactic acid), PDLA] and poly-L-lactic acid [ poly(L-lactic acid), PLLA] in a weight ratio of 1:3 to 5 is preferably used.

As another specific embodiment, the asphalt concrete composition according to the present invention is 1 to 10 parts by weight of tetraprue based on 100 parts by weight of asphalt so that the asphalt concrete layer on which the composition is applied has a surface with improved surface hardness, chemical resistance and stain resistance. An orethylene hexafluoropropylene copolymer (FEP) may be further included.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 0.1 to 5 parts by weight of isobornyl acrylate based on 100 parts by weight of asphalt to provide excellent fluidity and bonding strength of the composition.

As another specific embodiment, the asphalt concrete composition according to the present invention contains 0.1 to 3 parts by weight of polyoxyethylene polyoxypropylene glycol (polyoxyethylene polyoxy propylene block polymer) may be further included.

As another specific aspect, the asphalt concrete composition according to the present invention may further include 0.1 to 2 parts by weight of glutaraldehyde based on 100 parts by weight of asphalt to improve the bonding strength between components constituting the composition.

The asphalt concrete composition according to the present invention having such a configuration, specifically the asphalt concrete composition for thin-layer paving, and more specifically, the method of constructing the asphalt concrete composition for thin-layer paving including crushed aggregate will be described as follows.

The asphalt concrete composition construction method according to the present invention, specifically the asphalt concrete composition construction method for thin pavement containing crushed aggregate, includes a foreign matter removal-cleaning step of removing foreign matter on the surface and then cleaning;

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 crushed aggregate based on 100 parts by weight of asphalt on the surface where the foreign matter removal-cleaning step is completed 0.1 to 2 parts by weight of cellulosic fibers, 0.1 to 2 parts by weight of antioxidant, 0.1 to 2 parts by weight of anti-stripping agent, and 0.1 to 2 parts by weight of stabilizer An asphalt concrete composition for thin-layer paving is poured to thin pavement; and

It includes a curing step of curing after the pouring step is finished.

Here, the thin layer of the pouring step includes forming an asphalt concrete composition for thin pavement with a thickness of 10 to 50 mm.

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

[Example 1]

100 g of straight asphalt, 15 g of styrene isoprene 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 130 cps at 140 ° C, prepared by crushing gravel to an average particle size of about 6 mm 1,100 g of crushed aggregate, 1 g of natural cellulose fiber, 1 g of 2.2-methylenebis(4-methyl-6-t-butylphenol), 1 g of a liquid type polyphosphoric acid-based anti-stripping agent having a specific gravity of 1.0 or more and a viscosity of 110 cPs at 60 ° C, and An asphalt concrete composition for thin pavement containing crushed aggregate was prepared by mixing 1 g of pectin.

[Example 2]

It was carried out in the same manner as in Example 1, but with the addition of 3 g of polyvinyl alcohol powder containing pores of about 5 μm in the range of about 0.05 to 0.2 cc / g.

[Example 3]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of calcite powder having an average particle size of 3 μm.

[Example 4]

It was carried out in the same manner as in Example 1, but with the addition of 1 g of polyvinylidene fluoride resin.

[Example 5]

It was carried out in the same manner as in Example 1, but with the addition of 1 g of neopentyl glycol.

[Example 6]

It was carried out in the same manner as in Example 1, but with the addition of 1 g of gibbsite.

[Example 7]

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

[Example 8]

It was carried out in the same manner as in Example 1, but with the addition of 1 g of halloysite.

[Example 9]

It was carried out in the same manner as in Example 1, except that 2 g of fine gelite powder having an average particle size of 3 μm was further added.

[Example 10]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of calcium aluminate.

[Example 11]

It was carried out in the same manner as in Example 1, but with the addition of 3 g of sodium metasilicate.

[Example 12]

It was carried out in the same manner as in Example 1, but with the addition of 1 g of magnesium nitride.

[Example 13]

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

[Example 14]

It was carried out in the same manner as in Example 1, but with the addition of 15 g of modified sulfur having a viscosity of about 5 million cP at 135 ° C.

[Example 15]

It was carried out in the same manner as in Example 1, but with the addition of 5 g of isobutylaldehyde.

[Example 16]

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

[Example 17]

It was carried out in the same manner as in Example 1, but with the addition of 3 g of butyl acrylate.

[Example 18]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of imidazoline betaine.

[Example 19]

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

[Example 20]

It was carried out in the same manner as in Example 1, but with the addition of 3 g of sulforaphane.

[Example 21]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of polytrimethylene terephthalate.

[Example 22]

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

[Example 23]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of citric acid.

[Example 24]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of lithium hydroxide.

[Example 25]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of barium sulfate.

[Example 26]

It was carried out in the same manner as in Example 1, but with the addition of 3 g of serpentine powder having an average particle diameter of 0.1 mm.

[Example 27]

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

[Example 28]

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

[Example 29]

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

[Example 30]

It was carried out in the same manner as in Example 1, except that 1 g of fine zeolite powder having an average particle size of 3 μm was further added.

[Example 31]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of 3,3'-diaminodiphenylsulfone.

[Example 32]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of sodium magnesium silicate.

[Example 33]

It was carried out in the same manner as in Example 1, but with the addition of 3 g of potassium magnesium titanate.

[Example 34]

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

[Example 35]

It was carried out in the same manner as in Example 1, but with the addition of 1 g of sodium alkylbenzenesulfonate.

[Example 36]

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

[Example 37]

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

[Example 38]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of fine bauxite powder having an average particle size of 3 μm.

[Example 39]

It was carried out in the same manner as in Example 1, except that 5 g of a mixture of poly-D-lactic acid and poly-L-lactic acid mixed in a weight ratio of 1:4 was further added.

[Example 40]

It was carried out in the same manner as in Example 1, but with the addition of 5 g of tetrafluoroethylene hexafluoropropylene copolymer.

[Example 41]

It was carried out in the same manner as in Example 1, but with the addition of 3 g of isobornyl acrylate.

[Example 42]

It was carried out in the same manner as in Example 1, but with the addition of 2 g of polyoxyethylene polyoxypropylene glycol.

[Example 43]

It was carried out in the same manner as in Example 1, but with the addition of 1 g of glutaraldehyde.

[Example 44]

It was carried out in the same manner as in Example 1, except that all adducts added according to Examples 2 to 43 were added.

[Experiment]

After preparing an asphalt layer having a thickness of about 20 mm using the composition prepared according to the examples, low-temperature (at -10 ° C.) hardenability, crack resistance, dynamic stability, indirect tensile strength, deformation strength, rotational viscosity, etc. was measured and shown in Table 1.

Here, the dynamic stability was measured through the deformation strength test and the test by the Kim Test to evaluate the plastic deformation resistance, the indirect tensile strength was conducted to evaluate the crack resistance, and the rotational viscosity was measured using an asphalt rotational viscometer.

Gelation/1hr
(at -10℃) degree of crack dynamic stability
(pass/mm) indirect tensile strength
(ITS) strain strength
(Mpa) rotational viscosity 80℃ 100℃ 120℃ Example 1 66 doesn't exist 1856 0.84 5.55 5831 3567 1581 Example 2 67 doesn't exist 1867 0.85 5.54 5913 3645 1704 Example 3 68 doesn't exist 1868 0.87 5.86 5816 4631 1952 Example 4 68 doesn't exist 1858 0.87 5.87 5714 4102 1821 Example 5 66 doesn't exist 1957 0.86 5.86 6785 4553 1943 Example 6 68 doesn't exist 1966 0.88 5.86 5953 4263 1832 Example 7 68 doesn't exist 1958 0.88 5.78 6828 4356 1943 Example 8 69 doesn't exist 1839 0.86 5.83 6962 3557 1852 Example 9 67 doesn't exist 1858 0.91 5.74 6645 3660 1786 Example 10 67 doesn't exist 1959 0.93 5.71 6887 4871 2082 Example 11 68 doesn't exist 1949 0.86 5.68 7455 3755 2053 Example 12 69 doesn't exist 1948 0.84 5.65 7579 4143 2162 Example 13 68 doesn't exist 1967 0.88 5.72 6826 3948 1982 Example 14 69 doesn't exist 1873 0.86 5.65 7494 4756 2163 Example 15 66 doesn't exist 1974 0.84 5.68 6237 3229 1464 Example 16 69 doesn't exist 1985 0.83 5.71 6244 3356 1672 Example 17 69 doesn't exist 1979 0.88 5.73 5534 3143 1365 Example 18 68 doesn't exist 1867 0.84 5.74 5646 3152 1401 Example 19 69 doesn't exist 1869 0.86 5.88 5157 4741 1753 Example 20 70 doesn't exist 1963 0.88 5.90 6773 3863 2184 Example 21 70 doesn't exist 1874 0.87 5.88 6436 4701 1964 Example 22 67 doesn't exist 1983 0.89 5.73 6664 3482 2081 Example 23 67 doesn't exist 1886 0.87 5.98 6047 3395 2193 Example 24 69 doesn't exist 1984 0.89 5.63 6170 3252 2158 Example 25 69 doesn't exist 1876 0.91 5.83 6503 3877 2434 Example 26 69 doesn't exist 1907 0.90 5.56 6574 4363 1865 Example 27 69 doesn't exist 1898 0.87 5.88 5749 5393 1834 Example 28 70 doesn't exist 1864 0.87 5.71 5445 4460 1951 Example 29 69 doesn't exist 1873 0.89 5.76 6723 3693 1990 Example 30 66 doesn't exist 1893 0.88 5.74 6561 3475 1968 Example 31 67 doesn't exist 1886 0.87 5.82 6347 2766 1833 Example 32 68 doesn't exist 1897 0.89 6.10 6945 3829 2053 Example 33 67 doesn't exist 1875 0.86 6.15 6964 2538 1995 Example 34 69 doesn't exist 1869 0.86 5.89 6234 3955 1865 Example 35 69 doesn't exist 1976 0.87 6.11 6545 3793 2063 Example 36 69 doesn't exist 1905 0.92 5.86 6443 3392 1881 Example 37 68 doesn't exist 1885 0.91 5.95 5945 2658 1845 Example 38 70 doesn't exist 1868 0.88 5.79 5494 2455 1961 Example 39 69 doesn't exist 1875 0.89 5.74 6422 3767 1912 Example 40 66 doesn't exist 1914 0.90 5.78 6737 3565 1965 Example 41 68 doesn't exist 1885 0.90 5.66 6252 4401 2187 Example 42 68 doesn't exist 1901 0.87 5.91 6575 4546 1874 Example 43 69 doesn't exist 1922 0.89 5.65 6729 4473 2019 Example 44 69 doesn't exist 1905 0.87 5.84 5645 2853 1764

As shown in Table 1, the low-temperature hardenability, crackability, dynamic stability, indirect tensile strength and deformation strength of the examples using the thin-layer pavement asphalt concrete composition were good, and the rotational viscosity was at least 1200 or more at 80 to 120 ° C. It was.

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

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 an aliphatic C-5 petroleum resin having a viscosity of 130 cps at 140 ° C;
800 to 1,500 parts by weight of crushed aggregate;
0.1 to 2 parts by weight of cellulose fibers;
0.1 to 2 parts by weight of an antioxidant;
0.1 to 2 parts by weight of an anti-peeling agent; and
In the asphalt concrete composition for thin pavement containing 0.1 to 2 parts by weight of a stabilizer,
Further comprising 1 to 5 parts by weight of calcite powder based on 100 parts by weight of asphalt,
Halloysite is further included in an amount of 0.1 to 2 parts by weight based on 100 parts by weight of asphalt,
Further comprising 1 to 3 parts by weight of gelite fine powder based on 100 parts by weight of asphalt,
Further comprising 1 to 3 parts by weight of sodium tripolyphosphate based on 100 parts by weight of asphalt,
Further comprising 1 to 10 parts by weight of butyl acrylate based on 100 parts by weight of asphalt,
Further comprising sulforaphane in an amount of 1 to 5 parts by weight based on 100 parts by weight of asphalt,
Further comprising 1 to 5 parts by weight of polytrimethylene terephthalate based on 100 parts by weight of asphalt,
Further comprising 1 to 4 parts by weight of citric acid based on 100 parts by weight of asphalt,
Further comprising 0.1 to 2 parts by weight of zeolite fine powder based on 100 parts by weight of asphalt,
Further comprising 1 to 5 parts by weight of sodium magnesium silicate based on 100 parts by weight of asphalt,
Further comprising 1 to 5 parts by weight of zinc phosphate based on 100 parts by weight of asphalt,
Further comprising 1 to 3 parts by weight of peat based on 100 parts by weight of asphalt,
An asphalt concrete composition for thin pavement further comprising 0.1 to 5 parts by weight of isobornyl acrylate based on 100 parts by weight of asphalt.
delete delete delete A foreign substance removal-cleaning step of cleaning after removing foreign substances on the surface;
Based on 100 parts by weight of asphalt on the surface where the foreign matter removal-cleaning step is completed, 1 to 30 parts by weight of styrene isoprene styrene, 1 to 30 parts by weight of styrene butadiene styrene, 1 to 140 ℃ aliphatic C-5 petroleum resin having a viscosity of 130 cps 30 parts by weight, 800 to 1,500 parts by weight of crushed aggregate, 0.1 to 2 parts by weight of cellulose fiber, 0.1 to 2 parts by weight of antioxidant, 0.1 to 2 parts by weight of anti-exfoliation agent, and 0.1 to 2 parts by weight of stabilizer Asphalt concrete composition for thin layer pavement In addition, calcite powder is further included at 1 to 5 parts by weight based on 100 parts by weight of asphalt, halloysite is further included at 0.1 to 2 parts by weight based on 100 parts by weight of asphalt, and fine gelite powder is 1 to 5 parts by weight based on 100 parts by weight of asphalt. 3 parts by weight, further containing 1 to 3 parts by weight of sodium tripolyphosphate based on 100 parts by weight of asphalt, further including butyl acrylate at 1 to 10 parts by weight based on 100 parts by weight of asphalt, and sulforaphane based on 100 parts by weight of asphalt It further contains 1 to 5 parts by weight based on parts, further includes 1 to 5 parts by weight of polytrimethylene terephthalate based on 100 parts by weight of asphalt, and further contains 1 to 4 parts by weight of citric acid based on 100 parts by weight of asphalt, It further contains 0.1 to 2 parts by weight of fine zeolite powder based on 100 parts by weight of asphalt, 1 to 5 parts by weight of sodium magnesium silicate based on 100 parts by weight of asphalt, and 1 to 5 parts by weight of zinc phosphate based on 100 parts by weight of asphalt. An asphalt concrete composition for thin layer pavement further comprising 1 to 3 parts by weight of peat based on 100 parts by weight of asphalt, and 0.1 to 5 parts by weight of isobornyl acrylate based on 100 parts by weight of asphalt to thin layer pavement. Casting step of pouring; and
A method of constructing an asphalt concrete composition for thin pavement comprising a curing step of curing after the pouring step is finished.