Liquid type polymer asphalt composition and surface treatment method for asphalt pavement

Abstract

The present invention provides a liquid polymer asphalt composition comprising 50 to 70 weight% of a liquid polymer; 2 to 3 weight% of an admixture; and 27 to 47 weight% of emulsified asphalt, wherein the admixture is characterized by being a mixture of one or more of Amines (C16-18-alkyl), quaternary ammonium salts (Tallowdimonium propyltrimonium dichloride), and fatty acids (Fatty acdis), thereby enabling repair of damaged parts, improving adhesion performance and durability to extend service life, improving friction resistance performance, providing antifreeze effects, and obtaining excellent workability and eco-friendliness because it is constructed at room temperature.

Description

Technology Field

[0001] The present invention relates to the field of construction technology, and more specifically, to a liquid polymer asphalt composition and a surface treatment method for asphalt pavement using the same. Background Technology

[0002] Asphalt pavement is a structure composed of a mixture of asphalt, aggregate, and limestone powder, consisting of a mixture in which the asphalt coats and holds the aggregate.

[0003] Over time, the asphalt coating on the exposed surface of the asphalt pavement peels off due to vehicle traffic; as the asphalt coating wears off, the force holding the aggregates in place decreases, eventually leading to aggregate detachment and pavement damage.

[0004] Asphalt paving is constructed by laying the asphalt mixture using paving equipment; however, since there is a limit to the paving area of ​​the paving machine, the entire section cannot be paved at once and is constructed in sections.

[0005] As a result, the contact portion (110) between the part laid first and the lowered temperature and the part laid later and the higher temperature is not sufficiently attached, causing a construction joint to occur.

[0006] These construction joints are a major cause of damage to asphalt pavement, such as aggregate detachment, cracking, and potholes.

[0008] To prevent damage to asphalt pavements, surface treatment methods such as fog seals and slurry seals have been developed.

[0009] However, due to the reality of excessively high traffic volume in domestic asphalt pavements, the application of surface treatment methods requiring temporary traffic closure is minimal.

[0010] Therefore, it is common practice to perform surface layer cutting and reconstruction only after damage to the asphalt pavement has occurred, which consumes a significant amount of time and cost.

[0011] Meanwhile, even asphalt pavements treated with conventional surface treatment methods are damaged relatively easily, due to the unique characteristics of the domestic road environment.

[0012] Domestic roads have excessive traffic volume and severe temperature fluctuations, causing asphalt pavements to easily deteriorate due to the shrinkage and expansion of the material.

[0013] To solve this, it is necessary to develop surface treatment methods using high-performance materials. Prior art literature

[0014] (Patent Document 0001) KR 10-2025-0155787 A(Patent Document 0002) KR 10-2025-0083465 A(Patent Document 0003) JP 7617307 B2(Patent Document 0004) JP 7386955 B1(Patent Document 0005) JP 2023-158941 A(Patent Document 0006) JP 7350599 B2 The problem to be solved

[0015] The present invention was developed to solve the above-mentioned problems, and aims to provide a liquid polymer asphalt composition and a surface treatment method for asphalt pavement using the same, which enables repair of damaged parts, improves adhesion performance and durability to extend service life, improves friction resistance performance, has an anti-freezing effect, and achieves excellent workability and eco-friendliness because it is constructed at room temperature. means of solving the problem

[0016] To solve the above problem, the present invention provides a liquid polymer asphalt composition comprising 50 to 70 weight% of a liquid polymer; 2 to 3 weight% of an admixture; and 27 to 47 weight% of emulsified asphalt, wherein the admixture is characterized by being a mixture of one or more of Amines (C16-18-alkyl), quaternary ammonium salts (Tallowdimonium propyltrimonium dichloride), and fatty acids (Fatty acdis).

[0017] The above liquid polymer is preferably a mixture of one or more of liquid EVA (Ethylene Vinyl Acetate), liquid SBR (Styrene Butadiene Rubber), liquid SBS (Styrene Butadiene Styrene), and liquid resin.

[0018] It is preferable that the liquid type EVA (Ethylene Vinyl Acetate) has a solid content of 55% by weight or more, the liquid type SBR (Styrene Butadiene Rubber) has a solid content of 55% to 64% by weight, the liquid type SBS (Styrene Butadiene Styrene) has a solid content of 50% to 60% by weight, and the liquid type Resin composition has a solid content of 50% by weight or more.

[0019] It is preferable that the above emulsified asphalt is a mixture of one or more of cationic, anionic, and nonionic compositions.

[0020] The above emulsified asphalt preferably has an asphalt solid content of 30 to 60 weight percent.

[0021] It is preferable that the above emulsified asphalt has a penetration of 40 or less.

[0022] The present invention provides a method for manufacturing a liquid polymer asphalt composition, comprising: a step of manufacturing a base emulsified asphalt composition by mixing the emulsified asphalt and an admixture at a speed of 100 to 200 rpm for 1 to 2 hours to manufacture a base emulsified asphalt composition; and a step of manufacturing the liquid polymer emulsified asphalt by mixing the liquid polymer with the base emulsified asphalt composition at a speed of 30 to 100 rpm for 3 to 4 hours.

[0023] The present invention relates to a surface treatment method for asphalt pavement using the above-described liquid polymer asphalt composition, comprising: a coating step of applying the above-described liquid polymer asphalt composition to the surface of the asphalt pavement in an amount of 0.2 to 0.5 L / ㎡; an aggregate spreading step of spreading aggregate to secure frictional resistance performance; and 0.03 to 0.05 kgf / cm² on the surface of the asphalt pavement for the penetration and adhesion of the above-described liquid polymer asphalt composition into cracks. 2 A surface treatment method for asphalt pavement is presented, characterized by including a load application step in which a load is applied by a load plate (100) so as to apply pressure.

[0024] The load plate (100) preferably comprises: a contact portion (110) formed from a material of polyurethane high-elasticity foam, high-hardness sponge, or high-density sponge so as not to cause damage to the asphalt pavement; and a weight portion (120) formed from a material with a higher weight than the material of the contact portion (110) and installed on the upper part of the contact portion (110).

[0025] The above aggregate spreading step involves using aggregate with a particle size range of 0.35 to 1.2 mm at a rate of 0.2 to 0.5 kg / m³ 2 It is advisable to spray an amount equal to that. Effects of the invention

[0026] The present invention provides a liquid polymer asphalt composition and a surface treatment method for asphalt pavement using the same, which enables repair of damaged parts, improves adhesion performance and durability to extend service life, improves friction resistance performance, has an anti-freezing effect, and achieves excellent workability and eco-friendliness because it is constructed at room temperature. Brief explanation of the drawing

[0027] FIG. 1 and below illustrate embodiments of the present invention, Figures 1 and 2 are photographs of the results of physical property tests depending on whether an admixture was incorporated. Figure 3 is a conceptual diagram of a surface treatment method. Figure 4 is a cross-sectional view of the load plate. Specific details for implementing the invention

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0029] As shown in FIG. 1 and below, the liquid polymer asphalt composition according to the present invention comprises 50 to 70 weight% of a liquid polymer; 2 to 3 weight% of an admixture; and 27 to 47 weight% of emulsified asphalt.

[0030] Liquid polymers are materials that increase adhesion and compatibility, and one or more of liquid EVA (Ethylene Vinyl Acetate), liquid SBR (Styrene Butadiene Rubber), liquid SBS (Styrene Butadiene Styrene), and liquid resin are used.

[0031] Here, the weight percentage of polymer solids is an important factor in determining the construction volume of the construction site, and the following quality standards must be applied.

[0032] Liquid EVA (Ethylene Vinyl Acetate) with a solid content of 55% by weight or more, liquid SBR (Styrene Butadiene Rubber) with a solid content of 55% to 64% by weight, liquid SBS (Styrene Butadiene Styrene) with a solid content of 50% to 60% by weight, and liquid resin composition with a solid content of 50% by weight or more are used.

[0033] The admixture is a material used to mix the liquid polymer and the emulsified asphalt, and is a mixture of one or more of Amines (C16-18-alkyl), quaternary ammonium salts (Tallowdimonium propyltrimonium dichloride), and fatty acids (Fatty acdis).

[0034] Emulsified asphalt is used in which one or more of cationic, anionic, and nonionic compositions are mixed.

[0035] The above emulsified asphalt has an asphalt solid content of 30 to 60 weight percent and a penetration of 40 or less.

[0037] The method for manufacturing a liquid polymer asphalt composition according to the present invention is carried out by the following process.

[0038] A base emulsified asphalt composition is prepared by mixing emulsified asphalt and an admixture at a speed of 100 to 200 rpm for 1 to 2 hours.

[0039] Subsequently, a liquid polymer is mixed into the base emulsified asphalt composition and mixed at a speed of 30 to 100 rpm for 3 to 4 hours to produce a liquid polymer emulsified asphalt.

[0041] The surface treatment method for asphalt pavement using the liquid polymer asphalt composition according to the present invention is carried out by the following process.

[0042] A liquid polymer asphalt composition is applied to the surface of the asphalt pavement in an amount of 0.2 to 0.5 L / m².

[0043] Aggregates are sprayed onto the coated surface to ensure frictional resistance performance, using aggregates with a particle size range of 0.35 to 1.2 mm at a rate of 0.2 to 0.5 kg / m² 2 Spray an amount equal to the amount of

[0044] For the penetration and adhesion of the above liquid polymer asphalt composition into cracks, 0.03~0.05 kgf / cm² on the surface of the asphalt pavement 2 A load is applied by the load plate (100) so that pressure is applied (Fig. 3).

[0045] The load plate (100) is composed of a contact portion (110) and a weight portion (120). (Fig. 4)

[0046] The contact portion (110) is formed from one of the following materials: polyurethane high-elasticity foam, high-hardness sponge, or high-density sponge, so as not to cause damage to the asphalt pavement.

[0047] The weight portion (120) is formed of a material (such as rubber) that is heavier than the material of the contact portion (110) and is installed on the upper part of the contact portion (110).

[0048] A load plate (100) of this structure can be installed at the rear of a work vehicle and constructed by dragging it.

[0050] Hereinafter, test results for verifying the physical properties of the liquid polymer asphalt composition according to the present invention will be described.

[0051] An embodiment of the present invention is prepared by mixing 60% by weight of liquid EVA (liquid polymer), 2% by weight of Amines (C16-18-alkyl) (admixture), and 38% by weight of cationic emulsified asphalt with a penetration of 40, using the manufacturing method described above.

[0052]

[0053] Table 1 shows the test results of comparative examples and embodiments of the present invention to evaluate the difference in performance depending on whether an admixture is incorporated.

[0054] Comparative Example 1 is one in which no admixture is incorporated, Comparative Example 2 is one in which 1 weight% of an admixture is incorporated, and Example 2 is one in which 2 weight% of an admixture is incorporated, and the remaining components are all the same.

[0055] Since the admixture is a material intended to mix the liquid polymer and the emulsified asphalt, a visual evaluation and a sieve residue test (KS M 2203) to evaluate the degree of residue generation were performed to confirm whether they were well mixed.

[0056] Test results showed that when the admixture was not incorporated, the material hardened due to a breaking phenomenon and could not be used, and when 1 wt% was used, it appeared to mix but the amount of residue increased. (Fig. 2)

[0057] When 2 to 3 weight percent of the admixture is used, the visual evaluation results are satisfactory, and it was confirmed that the amount of residue generated satisfies the KS quality standard (within 0.3%). (Fig. 1)

[0058]

[0059] Table 2 shows the results of the KS F 2393 High Temperature Performance (DSR) test.

[0060] Comparative Example 1 is a tack coat emulsified asphalt composition, Comparative Example 2 is a modified emulsified asphalt, and the example is manufactured by the formulation described above.

[0061] In the case of asphalt pavements without surface treatment, damage is generally caused by aggregate detachment resulting from cracking at low temperatures; however, in the case of asphalt pavements with surface treatment, damage mainly occurs due to asphalt loss at high temperatures because the adhesive strength is increased compared to general asphalt pavements.

[0062] The liquid polymer asphalt composition according to the present invention utilizes a liquid polymer to solve the above problem.

[0063] Tack coat emulsified asphalt and modified emulsified asphalt, which are similar materials, were used as comparative examples, and it was confirmed that the example exhibited a shear stress (G* / sinδ) approximately 18 to 37 times higher than that of the comparative example.

[0064]

[0065] Table 3 shows the adhesion strength test results according to the KS F 4932 test method.

[0066] It was performed to evaluate the adhesion performance with asphalt pavement, and the test results confirmed that the adhesion performance of the example was 7 to 17 times better than that of the comparative example, tack coat and modified emulsified asphalt.

[0067]

[0068] Table 4 shows the softening point test results according to penetration characteristics.

[0069] The softening point refers to the temperature at which asphalt becomes fluid; the higher the softening point, the less it changes with heat, resulting in superior durability.

[0070] Comparative Example 1 is a mixture of emulsified asphalt with a penetration of 80, Comparative Example 2 is a mixture of emulsified asphalt with a penetration of 60, and the Example is a mixture of emulsified asphalt with a penetration of 40, and all other components are identical.

[0071] Test results confirmed that when emulsified asphalt with a penetration of 40 or less is applied, the softening point increases by 1.2 times.

[0072]

[0073] Table 5 shows the test results regarding the difference in friction resistance performance according to the construction sequence.

[0074] The example was constructed in the order of asphalt application (application of liquid polymer asphalt composition), aggregate spreading, and load application by a load plate, while the comparative example was constructed in a different order.

[0075] As a result of the test, it was confirmed that when constructed using the method of the example, the friction resistance performance increased by about 5 to 7 or more.

[0076]

[0077] Table 6 shows the test results regarding the difference in frictional resistance performance according to the amount of aggregate spread.

[0078] The example uses aggregate with a particle size range of 0.35 to 1.2 mm at a rate of 0.2 to 0.5 kg / m³ 2 This is a case where an amount of aggregate is applied, and the comparative example is a case where aggregate of the same particle size is applied in a different amount.

[0079] As a result of the test, it was confirmed that when constructed using the method of the example, the friction resistance performance increased by about 5 to 7 or more.

[0081] The liquid polymer asphalt composition according to the present invention applies a liquid polymer, which is a polymer material, to asphalt at a rate of 50% or more, thereby maximizing the performance of the material and improving the adhesion performance and durability of the asphalt pavement.

[0082] The surface treatment method for asphalt pavement according to the present invention is applicable to all domestic asphalt pavements (new pavements, aged pavements) and enables the repair of damaged areas (potholes, cracks, aggregate detachment areas, etc.).

[0083] Specifically, it can be applied to all pavements made of asphalt mixtures, such as the road surface, driving section, and base layer.

[0084] In addition, when applied to side roads or old paved roads, it has the effect of extending service life, and when applied to new pavement, it can improve visibility.

[0085] Since aggregates are scattered, frictional resistance and anti-freezing performance can be improved depending on the characteristics of the aggregates, and because construction is performed at room temperature (normal ambient temperature), it offers excellent workability and convenience.

[0086] In other words, the surface treatment method for asphalt pavement according to the present invention secures frictional force by scattering aggregate after construction of a liquid polymer asphalt composition, improves adhesion as the liquid polymer asphalt penetrates into cracks through consolidation construction, and improves aggregate bonding strength to obtain an effect of preventing aggregate detachment.

[0088] The foregoing merely describes some preferred embodiments that can be implemented by the present invention. As is well known, the scope of the present invention should not be interpreted as being limited to the above embodiments, and all technical concepts that share the fundamental principles with the technical concept of the present invention described above shall be considered to be included within the scope of the present invention. Explanation of the symbols

[0089] 100 : Load plate 110 : Contact part 120 : Weight part

Claims

Claim 1 A liquid polymer asphalt composition comprising 50 to 70 weight% of a liquid polymer; 2 to 3 weight% of an admixture; and 27 to 47 weight% of emulsified asphalt, wherein the admixture is characterized by being a mixture of one or more of amines (C16-18-alkyl), quaternary ammonium salts (Tallowdimonium propyltrimonium dichloride), and fatty acids (Fatty acidis). Claim 2 A liquid polymer asphalt composition according to claim 1, characterized in that the liquid polymer is a mixture of one or more of liquid EVA (Ethylene Vinyl Acetate), liquid SBR (Styrene Butadiene Rubber), liquid SBS (Styrene Butadiene Styrene), and liquid Resin. Claim 3 A liquid polymer asphalt composition according to claim 2, characterized in that the liquid type EVA (Ethylene Vinyl Acetate) has a solid content of 55% by weight or more, the liquid type SBR (Styrene Butadiene Rubber) has a solid content of 55% to 64% by weight, the liquid type SBS (Styrene Butadiene Styrene) has a solid content of 50% to 60% by weight, and the liquid type resin composition has a solid content of 50% by weight or more. Claim 4 A liquid polymer asphalt composition according to claim 1, wherein the emulsified asphalt is characterized by being a mixture of one or more of cationic, anionic, and nonionic compositions. Claim 5 In claim 4, the liquid polymer asphalt composition is characterized in that the emulsified asphalt has an asphalt solid content of 30 to 60 weight percent. Claim 6 In claim 4, the liquid polymer asphalt composition is characterized in that the emulsified asphalt has a penetration of 40 or less. Claim 7 A method for manufacturing a liquid polymer asphalt composition according to any one of claims 1 to 6, comprising: a step of manufacturing a base emulsified asphalt composition by mixing the emulsified asphalt and an admixture at a speed of 100 to 200 rpm for 1 to 2 hours to manufacture a base emulsified asphalt composition; and a step of manufacturing the liquid polymer emulsified asphalt by mixing the liquid polymer with the base emulsified asphalt composition at a speed of 30 to 100 rpm for 3 to 4 hours. Claim 8 A surface treatment method for asphalt pavement using a liquid polymer asphalt composition according to any one of claims 1 to 6, comprising: a coating step of applying the liquid polymer asphalt composition to the surface of the asphalt pavement in an amount of 0.2 to 0.5 L / ㎡; an aggregate spreading step of spreading aggregate to secure frictional resistance performance; and 0.03 to 0.05 kgf / cm² on the surface of the asphalt pavement for the penetration and adhesion of the liquid polymer asphalt composition into cracks. 2 A surface treatment method for asphalt pavement characterized by including a load application step in which a load is applied by a load plate (100) so as to apply pressure. Claim 9 In claim 8, the surface treatment method for asphalt pavement is characterized in that the load plate (100) comprises: a contact portion (110) formed by a material of polyurethane high-elasticity foam, high-hardness sponge, or high-density sponge so as not to cause damage to the asphalt pavement; and a weight portion (120) formed by a material having a higher weight than the material of the contact portion (110) and installed on the upper part of the contact portion (110). Claim 10 In claim 8, the aggregate spreading step comprises aggregate having a particle size range of 0.35 to 1.2 mm at a rate of 0.2 to 0.5 kg / m³ 2 A surface treatment method for asphalt pavement characterized by spraying an amount of

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