KR102385382B1 - Repairing method for asphalt pavement - Google Patents

Abstract

The present invention relates to a repair method for asphalt pavement that comprises the steps of manufacturing a block unit for repair using an asphalt mixture containing a modified asphalt binder (S10); forming a repair part by removing an asphalt pavement layer requiring repair (S20); applying the modified asphalt binder to the repair part (S30); and assembling the block unit to the repair part (S40). The repair method for asphalt pavement according to the present invention provides improved constructability as well as structural stability.

Description

Asphalt pavement repair method {Repairing method for asphalt pavement}

The present invention relates to an asphalt pavement repair method that is easy to construct and has improved structural integrity.

Asphalt is a residue remaining after evaporation of volatile oils among the components of crude oil. It is widely used as a binder for aggregates when installing packaging materials.

However, pavement using such asphalt has different coefficients of thermal expansion according to seasonal temperature change and damage to connection parts caused by vehicle wheel load, cracks caused by subsidence of the ground and poor compaction, and portholes caused by increased heavy vehicle traffic and rain/snowfall. Damage to asphalt pavement occurs due to various factors such as

If foreign substances such as rain, snow, and calcium chloride penetrate into these damaged areas, the damaged area becomes larger and eventually leads to serious damage to the road, which not only interferes with vehicle traffic, but also may cause traffic accidents. Therefore, in order to safely drive the vehicle and extend the life of the road, it is necessary to repair the damaged part of the asphalt pavement promptly.

Accordingly, in the prior art, a method of filling the asphalt repair material after cutting the damaged part of the asphalt pavement is used, but the method does not improve the physical properties of the perfect asphalt, and there is a problem that the defect recurs later.

Korean Patent Registration No. 10-1647296

An object of the present invention is to provide an asphalt pavement repair method that is structurally stable and has improved workability.

As a means for solving the above problems, the asphalt pavement repair method of the present invention (hereinafter referred to as "the method of the present invention") comprises the steps of manufacturing a block unit for repair using an asphalt mixture containing a modified asphalt binder (S10). ); forming a repair part by removing the asphalt pavement layer requiring repair (S20); applying the modified asphalt binder to the repair part (S30); Assembling the block unit to the repair unit (S40); characterized in that it includes.

As an example, in the step S30, the modified asphalt binder applied to the repair part is impregnated with an elastic reinforcing fiber composed of an upper layer and a lower layer as a woven fiber and a support yarn for supporting the upper layer and the lower layer.

As an example, in the step S30, the support yarn in the elastic reinforcing fiber is characterized in that it is configured in a spirally wound shape.

As an example, in step S10, a modified asphalt binder comprising asphalt, thermoplastic elastomer, polyethylene wax, sulfur powder, and alkylpyrinium salt; new aggregate; recycled aggregate; Blending the asphalt mixture containing the filler (S11); It characterized in that it comprises; filling a mold with the asphalt mixture blended in S11 to prepare a block unit (S12).

As an example, the modified asphalt binder may further include a first reinforcing fiber and a second reinforcing fiber composed of a material having a higher melting point than the first reinforcing fiber.

As an example, the surface of the second reinforcing fiber is characterized in that a coating layer made of seaweed powder is applied.

As an example, the filler includes silicon dioxide and dolomite.

As an example, the dolomite is characterized in that the magnesium carbonate film is formed inside and outside by reacting with a gas containing carbon dioxide.

As an example, the filler is characterized in that it contains a mixture of inorganic waste sludge powder and sulfite that are by-product in the soda ash production process.

As described above, the method of the present invention has the advantage of minimizing the disruption of traffic by rapid construction.

In addition, the method of the present invention can structurally improve the impact resistance in the repair part, and the repair is made by the precast block unit, so that uniform physical properties are expressed in the repair part, and the material itself of the asphalt mixture constituting the block unit is It has excellent physical properties such as crack resistance and water resistance.

1 is a block diagram illustrating the method of the present invention;
2a to 2d show a method of the present invention;
3 is a view showing an elastic reinforcing fiber applied to the method of the present invention.
4 is a cross-sectional view showing a state in which elastic reinforcing fibers are impregnated in an asphalt binder and placed in a repair site in the method of the present invention.

Hereinafter, the configuration and operation of the present invention will be described in more detail based on the accompanying drawings. In describing the present invention, the terms or words used in the present specification and claims are based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her invention. It should be interpreted as meaning and concept consistent with the technical idea of

The method of the present invention includes the steps of manufacturing a block unit for repair using an asphalt mixture containing a modified asphalt binder as shown in FIG. 1 (S10); forming a repair part by removing the asphalt pavement layer requiring repair (S20); applying the modified asphalt binder to the repair part (S30); Assembling the block unit to the repair unit (S40); characterized in that it includes.

The present invention first has a step (S10) of manufacturing a block unit for repair using an asphalt mixture containing a modified asphalt binder. That is, by manufacturing a precast block unit and repairing the asphalt pavement by such block unit, the precast block unit enables easy repair and construction, as well as secures uniformity of physical properties, The asphalt mixture including the modified asphalt binder constituting the block unit also has excellent physical properties, such as crack resistance and water resistance, as described below.

In the step S10, a modified asphalt binder comprising asphalt, thermoplastic elastomer, polyethylene wax, sulfur powder, and alkylpyrinium salt; new aggregate; recycled aggregate; Blending the asphalt mixture containing the filler (S11); It characterized in that it comprises; filling a mold with the asphalt mixture blended in S11 to prepare a block unit (S12).

In step S11, a modified asphalt binder comprising asphalt, thermoplastic elastomer, polyethylene wax, sulfur powder, and alkylpyrinium salt; new aggregate; recycled aggregate; blending the asphalt mixture comprising the filler.

Preferably, the modified asphalt binder includes 1 to 8 parts by weight of a thermoplastic elastomer, 0.01 to 1 parts by weight of polyethylene wax, 0.01 to 1 parts by weight of sulfur powder, and 0.01 to 1 parts by weight of an alkylpyrinium salt based on 100 parts by weight of asphalt. justifiable

The type of asphalt is not limited, but BRA (Buton Rock Asphalt) or TLA (Trinidad Lake Asphalt) may be applied, for example. BRA (Buton Rock Asphalt) or TLA (Trinidad Lake Asphalt) has a lower flexural strength coefficient than general asphalt, so when it is applied to steel decks, it is dependent on the behavior of the steel decks, and problems such as lifting of the joint surface are controlled.

The thermoplastic elastomer is a component that improves the viscosity properties at high temperatures while enhancing elasticity at low temperatures. Examples of the thermoplastic elastomer include styrene-butadiene rubber (SBR), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butadiene-styrene block copolymer (SEBS) ), styrene-isoprene-styrene block copolymer (SIS), etc.); Olefin copolymers (more specifically, ethylene-vinyl acetate copolymers (EVA), etc. may be applied.

The polyethylene wax functions as a medium temperature additive, and lowers the temperature required for the manufacture and/or construction of the asphalt binder by about 20 to 40° C., thereby minimizing the emission of carbon dioxide and harmful substances. Preferably, the polyethylene wax has a melting point of 90 to 130° C., and a melt viscosity of about 130° C. of 80 to 300 cPs.

If the melting point of the polyethylene wax is less than 90 ℃, the strength of the asphalt may be weakened when mixed with the asphalt, and if the melting point exceeds 130 ℃, uniform dispersion is not made and non-uniform physical properties may be expressed. will be.

The sulfur powder is such that functions such as plastic deformation and fatigue crack resistance increase are expressed. As the sulfur powder, natural sulfur derived from mines can be used as a general sulfur element, but the amount of sulfur generated during desulfurization during the refining process of domestic oil refineries reaches about 1.5 million tons per year, and securing and usability of mass demand. It is preferable to use sulfur generated during the refining process of an industrial by-product, an oil refinery, in a situation where there is a limit to the increase.

The alkylpyrinium salt corresponds to a configuration for improving the adhesion between the asphalt binder and the aggregate.

On the other hand, new aggregate and recycled aggregate are applied to the asphalt mixture.

In general, the quality or particle size of aggregate greatly affects the performance of the pavement, and physico-chemical properties differ depending on the production area. In general, coarse aggregate means the aggregate remaining in the 2.5mm (No. 8) sieve, while fine aggregate means the aggregate remaining in the 0.08mm (No. 200) sieve after passing through the 2.5mm sieve.

Here, the coarse aggregate is crushed aggregate (crushed stone), crushed slag, crushed gravel, and the like, and preferably does not contain harmful substances such as clay, silt, and organic matter (refer to KS F 2357 standard). Fine aggregate is crushed sand (screenings) obtained by breaking rocks, gravel, etc., natural sand, or a mixture thereof, and preferably does not contain harmful substances such as dust, clay, and organic matter (refer to KS F 2357 standard).

The recycled aggregate refers to an aggregate obtained by pulverizing pre-prepared asphalt concrete, and the asphalt used in production is attached to the conventional asphalt concrete, and generally 1.0 to 1.5 parts by weight of asphalt is attached based on 25 to 30 parts by weight of the recycled aggregate. .

Preferably, it is reasonable to mix 10 to 30 parts by weight of the recycled aggregate with respect to 100 parts by weight of the new aggregate.

The modified asphalt binder of the present invention contains reinforcing fibers in addition to the above composition to improve crack resistance. . That is, the first reinforcing fiber and the second reinforcing fiber composed of a material having a higher melting point than the first reinforcing fiber are further added.

Preferably, it is reasonable to mix 0.01 to 1 part by weight of reinforcing fibers with respect to 100 parts by weight of asphalt, and the first reinforcing fiber and the second reinforcing fiber are blended in a weight ratio of (4:6) to (6:4). justifiable

Here, the first reinforcing fiber and the second reinforcing fiber are selected from the group consisting of cellulose fiber, polyvinyl fiber, nylon fiber, polyethylene fiber, and glass fiber, and are selected from two types having different melting points. The first reinforcing fiber with a low melting point imparts adhesiveness to the binder by molecular bonding with the asphalt binder in the mixing process, etc., and the second reinforcing fiber with a high melting point covers the aggregate in the form of bonding with the binder to form a bond between the aggregate and the binder and between the aggregate and the aggregate. It is to improve the shear strength and tensile strength of the asphalt mixture by greatly increasing the frictional force through the bridge effect.

On the other hand, polyethylene wax is added to the asphalt mixture as a medium-temperature additive as seen above, but since the aggregate is heated at a lower temperature than that of the conventional heated asphalt mixture, there is a limit in removing moisture present in the aggregate during the preparation of the asphalt mixture.

As a result, the asphalt mixture with the added medium temperature additive has lower moisture sensitivity than the heated asphalt mixture, so the cohesion and adhesion between the aggregate and the asphalt are weakened by the water flowing into the asphalt pavement. cause tally. This phenomenon, that is, the phenomenon that the asphalt flows down from the aggregate is called a “drain-down” phenomenon, and this phenomenon causes the problem of the aggregate to be detached from the asphalt after construction.

Accordingly, in the present invention, the surface of the second reinforcing fiber is modified reinforcing fibers coated with a coating layer of seaweed powder to be used. By expressing the viscosity upon contact with the second reinforcing fiber and the aggregate, the drain-down phenomenon is controlled.

That is, the second reinforcing fiber coated with seaweed powder doubles the force holding the asphalt from the aggregate to control the drain-down phenomenon. In addition, the seaweed powder applied to the second reinforcing fiber absorbs the moisture contained in the aggregate, thereby controlling the factors that decrease the water resistance of the binder due to the moisture.

Here, the type of seaweed powder is not limited, and as an example, seaweed powder belonging to brown algae may be applied.

On the other hand, in the present invention, as mentioned above, in the case of the asphalt mixture to which polyethylene wax is added, moisture sensitivity is lowered than that of the heated asphalt mixture, and another embodiment is provided to solve the problem of lowering water resistance.

In this embodiment, an example in which silicon dioxide and dolomite are included in the filler is presented.

The silicon dioxide functions and serves to increase resistance to temperature change and humidity change by reducing thermal conductivity and reducing temperature deviation.

In addition, dolomite is included to impart water resistance to the paste, and the dolomite reacts with silicon dioxide to impart water resistance to water.

That is, a mixture of silicon dioxide and dolomite is added to the filler. Silicon dioxide improves the stability of the paste against changes in humidity. In addition, more dolomite is added so that the dolomite reacts with the silicon dioxide to give the paste water resistance to water. will do

As a result, even if sufficient moisture is not removed from the aggregate during the mixing process of the medium-temperature asphalt mixture, stability is obtained by silicon dioxide against humidity changes due to exposure to such moisture, and in addition to the moisture exposed by the reaction of silicon dioxide and dolomite This is to improve the water resistance of the paste.

The silicon dioxide and dolomite mixture is preferably mixed in a weight ratio of (6: 4) to (8: 2).

In addition to this, the present invention provides an example in which water resistance is doubled by mixing modified dolomite to improve reactivity with silicon dioxide.

In this embodiment, the dolomite reacts with a gas containing carbon dioxide so that the magnesium carbonate film is formed inside and outside the modified dolomite is included.

Dolomite has pores inside and outside. Modified dolomite reacts dolomite particles with a gas containing carbon dioxide so that a film of magnesium carbonate is applied inside and outside the dolomite. The gas containing carbon dioxide is supplied to the furnace so that a film of magnesium carbonate is formed on the surface and inside by diffusion.

In this way, the film is formed to generate magnesium carbonate (MgCO ₃ ) in the inner and outer pores of the dolomite to double the reactivity with silicon dioxide, thereby improving water resistance as mentioned above.

On the other hand, the asphalt mixture of the present invention includes recycled aggregate, and the recycled aggregate is used to regenerate waste asphalt. Since the physical properties cannot be completely reproduced, there may be problems such as a decrease in strength due to this point.

Accordingly, in the asphalt mixture of the present invention, the filler contains the inorganic waste sludge powder and the sulfite mixture produced during the soda ash production process so that physical properties such as strength are supplemented.

The inorganic waste sludge powder produced by the soda ash production process is composed of sodium chloride and potassium carbonate as main raw materials, and the inorganic waste sludge discharged from the plant producing soda ash (Na ₂ CO ₃ ) is sedimented and washed with water to be included in the sludge. It is manufactured by removing about 70% of the chlorine group (Cl ^- ), drying it at a predetermined temperature, and grinding it through a mesh of a predetermined size.

Such inorganic waste sludge powder is a material with a small specific gravity but high strength and does not expand even when heat is applied to improve the strength of asphalt. will be.

However, when only the inorganic waste sludge powder is used, the strength can be reinforced to some extent. However, the inorganic waste sludge powder contains a chlorine group (Cl ^- ) component that acts as an inhibitor of strength enhancement, so it is useful for strengthening asphalt strength. There are limits.

Accordingly, in the present invention, a mixture of inorganic waste sludge powder and sulfite is added to the filler. The sulfite promotes the decomposition of chlorine group (Cl ⁻ ) components from inorganic waste sludge powder by decomposition action and makes it immobilized with solid zinc chloride through hydrogen chloride, thereby inactivating chlorine groups (Cl ⁻ ) as a factor in inhibiting strength. .

Preferably, it is appropriate that the inorganic waste sludge powder and the sulfite are mixed in a weight ratio of (95:5) to (99:1).

Hereinafter, preferred examples of the asphalt mixture of the present invention will be described by way of experimental examples.

<Production of Psalms>

After preheating while stirring the asphalt, 5 parts by weight of thermoplastic elastomer, 0.5 parts by weight of polyethylene wax, 0.5 parts by weight of sulfur powder, 0.5 parts by weight of alkylpyrinium salt, 0.1 parts by weight of polypropylene reinforcing fiber, 0.1 parts by weight of glass fiber based on 100 parts by weight of asphalt The modified asphalt binder is prepared by sequentially adding parts by weight, maintaining the stirring temperature at 140° C., and stirring for 30 minutes, and the modified asphalt is based on 100 parts by weight of a mixture of new aggregate, recycled aggregate (80: 20 by weight) and filler. An asphalt mixture was prepared by mixing 20 parts by weight of a binder while maintaining 140°C.

Here, in Example 1, glass fibers were added to the modified asphalt binder, and in Example 2, glass fibers coated with seaweed powder were added.

In addition, Example 3 is the same as Example 2, except that 20 parts by weight of a mixture of silicon dioxide and dolomite is mixed with 100 parts by weight of stone powder in the filler, and silicon dioxide and dolomite are blended in a weight ratio (6: 4), Example 4 was the same as Example 3, except that modified dolomite in which a magnesium carbonate film was formed inside and outside by reacting dolomite with a gas containing carbon dioxide was used, Example 5 is the same as Example 2, except that 100 stone powder in the filler 20 parts by weight of inorganic waste sludge powder was mixed with respect to parts by weight, Example 6 is the same as Example 5, except that 20 parts by weight of inorganic waste sludge powder and nitrite mixture (99 by weight ratio: 99: 1) was mixed.

The following experiment was performed with six specimens as shown above, and the results are shown in Table 1.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Water resistance (%) 61 66 74 78 67 66 Crack resistance (N) 19,760 19,810 19,910 19,970 19,920 19,960 Dynamic stability (times/mm) 920 970 965 970 980 990 Compressive strength (MPa, 28 days) 71 73 72 74 79 83

Water resistance (aggregate coverage after dynamic water immersion, %) was based on the EN-12697-11 Determination of the affinity between aggregate and bitumen test method. The Marshall stability and flow value test method of the used asphalt mixture was used as the standard, and the dynamic stability was measured by applying a ground pressure of 6.4kg/cm2 to a specimen of 300mm×300mm×50mm at 60 ℃ according to the wheel tracking test (KS F 2374) method. The number of reciprocations per dent depth (times/mm) was measured, and the compressive strength was measured using an asphalt compressive strength tester.

As shown in Table 1, it can be seen that Example 2 is superior to Example 1 in dynamic stability. As mentioned above, as a reinforcing fiber in Example 2, cellulose fibers coated with seaweed powder on the surface are used. It is considered that this is due to the control of the drain-down phenomenon.

In addition, it can be seen that Example 3 exhibits a superior effect than Example 2 in terms of water resistance, which is considered to be due to the fact that, as mentioned above, in the case of Example 3, a mixture of silicon dioxide and dolomite is further included in the filler, It can be seen that Example 4 exhibits a better effect in terms of water resistance than Example 3, which is believed to be due to the addition of modified dolomite to facilitate the reaction between silicon dioxide and dolomite as described above. .

In addition, it can be seen that Example 5 exhibits a superior effect than Example 2 in terms of compressive strength. It can be seen that Example 6 exhibits a more excellent effect in terms of compressive strength than Example 5, which is that the inorganic waste sludge powder contains more nitrite to inactivate chlorine groups (Cl ^- ) contained in the inorganic waste sludge powder. It is thought to be due to shikim. In addition, it can be seen that Examples 5 and 6 are more advantageous than Example 2 in terms of dynamic stability.

Next, by removing the asphalt pavement layer that needs repair, a step (S20) of forming a repair part is performed. As shown in FIGS. 2A and 2B , the packaging layer 2 is removed so that the repair part 21 is formed up to the upper part of the base layer 3 for the packaging layer 2 where the defect has occurred.

As shown in FIG. 2b , it is reasonable to form the repair part 21 up to the upper part of the base layer 3 , which removes asphalt from only the damaged part of the pavement layer 2 as mentioned above and adds a repair material. In this case, there is a problem that re-damage occurs in the repair part, which is due to the fact that the repair layer cannot be secured with sufficient impact resistance and crack resistance because the repair is made with a relatively thin thickness.

Accordingly, in the present invention, the repair part 21 is formed by removing the entire damaged pavement layer 2, and the repair is made with a deep thickness, while the repair part 21 is block as described below. It is to improve the workability by allowing the repair to be made by assembling the unit (7).

As a method of forming the repair part 21 in this way, various known techniques such as a cutting cutter can be applied, and thus detailed description thereof will be omitted.

Next, there is a step (S30) of applying the modified asphalt binder to the repair part. The modified asphalt binder functions as a primer for attaching the block unit 7 to the maintenance part 21 .

On the other hand, the repair part 21 is formed up to the upper surface of the base layer 3 as mentioned above. In the case of the base layer 3, the amount of aggregate is generally increased, so that the smoothness of the lower surface of the repair part 21 is reduced. It is not easy to raise.

Accordingly, in this step (S30), as shown in FIG. 2c , the modified asphalt binder 5 applied to the repair part 21 includes an upper layer 41 and a lower layer 42 as woven fibers, and the upper layer 41 and It is characterized in that the elastic reinforcing fiber (4) composed of the supporting yarn (43) supporting the lower layer (42) is impregnated. That is, the elastic reinforcing fibers 4 impregnated with the modified asphalt binder 5 are placed on the lower surface of the repair portion 21, and the modified asphalt binder 5 is placed on the sidewall of the repair portion 21 as shown in the drawing. ) to be applied only.

As shown in FIG. 3, the elastic reinforcing fiber 4 is a woven fiber, comprising an upper layer 41 and a lower layer 42, and a support yarn 43 supporting the upper layer 41 and the lower layer 42. characterized.

As shown in the drawings, the upper layer 41 and the lower layer 42 are formed by weaving a plurality of fiber yarns, and a plurality of meshes are formed to form a structure in which the upper and lower layers communicate.

With this configuration, as shown in FIG. 4, the aggregate g protruding from the base layer 3 is inserted into the mesh of the lower layer 42, so that the elastic reinforcing fibers 4 can be placed flat in the repair part 21. There is, and by this point, the assembly of the block unit 7 assembled on the upper part becomes easy.

The upper layer 41 and the lower layer 42 have a three-dimensional shape by the support yarn 43 so that a certain distance is formed by the support yarn 43 , and by the action of the support yarn 43 , the upper load, etc. This is to improve the resistance to the impact caused by the impact, and in particular, to facilitate the height adjustment when assembling the plurality of block units (7). That is, the ease of construction is achieved while being less affected by the flatness of the aggregate protruding from the lower surface of the repair part 21 .

In addition to this, the support thread 43 also functions as a shear key so that the block unit 7 and the base layer 3 can move together as a function to be expressed.

The fiber yarn constituting the upper layer 41, the lower layer 42, and the supporting yarn 43 of the elastic reinforcing fiber 4 is not limited to the material thereof, but it is appropriate to use a material having elasticity as the material itself, such as aramid.

The elastic reinforcing fibers 4 configured in this way are posted to improve impact resistance in the repair part as mentioned above, and to improve workability.

In order to further improve the impact resistance, it is appropriate that the support yarn 43 is configured in a spirally wound shape so that the support yarn 43 itself enables a spring behavior.

Finally, assembling the block unit to the maintenance unit 21 (S40); has.

As shown in FIG. 2D , a plurality of block units 7 are placed in the maintenance part 21 to be attached with the modified asphalt binder 5 .

A plurality of block units (7) are inserted into the maintenance section (21) and the step difference between the block units (7) is adjusted according to the gradient of the pavement layer (2), and the block units (7) are aligned in the maintenance section (21) and By applying a certain pressure, the modified asphalt binder 5 rises between the sidewalls of the block unit 7 and between the sidewalls of the block unit 7 and the sidewalls of the maintenance part 21 so that the overall level difference is adjusted.

And when the modified asphalt binder 5 exposed to the top is cleaned and cured, the repair is completed.

When asphalt concrete is laid and compacted at the site, quality deviation may occur depending on the site mix or compaction level, but the damaged part of the pavement layer 2 (repair unit 21) using the block unit 7 can be repaired. In the case of repair, it is possible to improve the quality of the repaired part and at the same time have the advantage of easy construction.

Those skilled in the art from the above description will be able to see that various changes and modifications are possible without departing from the technical spirit of the present invention. Accordingly, the technical scope of the present invention should not be limited to the content described in the detailed description of the specification, but should be defined by the claims.

2: packaging layer 3: base layer
4: elastic reinforcing fiber 5: binder
6: upper layer 7: block unit
21: maintenance department
41: upper layer 42: lower layer
43: support

Claims (9)

Manufacturing a block unit for repair using an asphalt mixture containing a modified asphalt binder (S10);
forming a repair part by removing the asphalt pavement layer requiring repair (S20);
applying the modified asphalt binder to the repair part (S30);
Assembling the block unit to the maintenance unit (S40); including,
In step S10,
Modified asphalt binder including asphalt, thermoplastic elastomer, polyethylene wax, sulfur powder, and alkylpyrinium salt; new aggregate; recycled aggregate; Blending the asphalt mixture containing the filler (S11);
Including; filling a mold with the asphalt mixture blended in S11 to prepare a block unit (S12);
The filler includes silicon dioxide, dolomite,
The asphalt pavement repair method, characterized in that the dolomite reacts with a gas containing carbon dioxide to form a film of magnesium carbonate inside and outside.
The method of claim 1,
In step S30,
The asphalt pavement repair method, characterized in that the modified asphalt binder applied to the repair part is impregnated with elastic reinforcing fibers composed of an upper layer and a lower layer as woven fibers and a support yarn for supporting the upper layer and the lower layer.
3. The method of claim 2,
In the step S30, the support yarn in the elastic reinforcing fiber is an asphalt pavement repair method, characterized in that it is configured in a spirally wound shape.
delete The method of claim 1,
To the modified asphalt binder, a first reinforcing fiber and a second reinforcing fiber composed of a material having a higher melting point than the first reinforcing fiber are further added.
6. The method of claim 5,
The second reinforcing fiber is an asphalt pavement repair method, characterized in that the surface is coated with a coating layer of seaweed powder.
delete delete The method of claim 1,
The filler is an asphalt pavement repair method, characterized in that it contains an inorganic waste sludge powder and a sulfite mixture produced during the soda ash production process.

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