Thin layer surface treatment mixture

Abstract

To provide a thin layer surface treatment mixture capable of forming a thin surface treatment layer having excellent adhesiveness and durability.SOLUTION: A thin layer surface treatment mixture for road surfaces includes a cationic emulsion and a mortar material, in which the mortar material comprises a quick-hardening admixture, cement, and fine aggregate.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a thin-layer surface treatment mixture for forming a thin-layer surface treatment layer on the surface of a road surface. [Background technology]

[0002] Pavement surfaces such as asphalt and concrete pavements are generally subjected to the direct load of traffic and are exposed to rain, ultraviolet rays, etc., which causes deterioration such as roughness and cracks to form on the surface, and this deterioration gradually progresses inward, eventually leading to failure. Preventive maintenance methods are used to prevent such damage caused by deterioration and to maintain the pavement by carrying out appropriate repairs.

[0003] As such a preventive maintenance method, a surface treatment method using a surface treatment mixture is generally known. For example, Patent Document 1 proposes a surface treatment mixture for use in the surface treatment method, which is a pavement surface repair material obtained by mixing a nonionic asphalt emulsion, an admixture mainly composed of cement, and one or more of aggregate, filler, and water. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-196145 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the technology of Patent Document 1, the surface treatment layer formed on the surface of pavement such as asphalt pavement or concrete pavement does not have sufficient adhesion to the pavement surface, and therefore, further improvement in adhesion was desired from the standpoint of improving reliability and durability. [Means for solving the problem]

[0006] As a result of intensive research into solving the above problems, the inventors discovered that by using a thin-layer surface treatment mixture for road surfaces that contains a cationic emulsion and a mortar material containing a fast-hardening admixture, cement, and fine aggregate, it is possible to form a thin surface treatment layer on the road surface that has excellent adhesiveness and durability, and have completed the present invention.

[0007] That is, according to the present invention, there is provided a thin layer surface treatment mixture for road surfaces, which comprises a cationic emulsion and a mortar material, wherein the mortar material comprises a rapid-hardening admixture, cement, and fine aggregate.

[0008] In the present invention, the cationic emulsion is preferably a latex of a cationic styrene-butadiene copolymer. The thin layer surface treatment mixture of the present invention preferably further contains a color pigment. Furthermore, the thin-layer surface treatment mixture of the present invention preferably further contains carbon black. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a thin layer surface treatment mixture capable of forming a thin surface treatment layer having excellent adhesiveness and durability. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a graph showing the results of measuring the pot life and working life of the thin-layer surface treatment mixture according to Example 1. [Figure 2] FIG. 2 is a graph showing the measurement results of the adhesiveness of the thin-layer surface treatment mixture according to Example 1 and the thin-layer surface treatment mixture according to Comparative Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0011] The thin layer surface treatment mixture of the present invention is a thin layer surface treatment mixture for road surfaces, which contains a cationic emulsion and a mortar material, and the mortar material contains a rapid-hardening admixture, cement, and fine aggregate.

[0012] The thin-layer surface treatment mixture of the present invention is a mixture used to form a thin surface treatment layer on a paved road surface such as an asphalt pavement or a concrete pavement, and is usually a premix type mixture prepared by mixing a cationic emulsion with a mortar material immediately before application. By applying the thin-layer surface treatment mixture of the present invention prepared in this manner to a paved road surface, a thin surface treatment layer (for example, 1 to 5 mm thick, preferably 1 to 3 mm thick) can be formed. Specifically, when the thin-layer surface treatment mixture of the present invention is applied to a pavement surface, the cationic emulsion reacts with the mortar material, causing a hardening reaction to occur, forming a surface treatment layer on the pavement surface that has excellent adhesion and durability. In other words, the thin-layer surface treatment mixture of the present invention is a premixed, room-temperature hardening mixture.

[0013] The thin-layer surface treatment mixture of the present invention can be used for repairing paved road surfaces and for preventive maintenance of paved road surfaces, and can also be used for colored pavements by adding color pigments (e.g., red, yellow, green, blue, orange, etc.).Furthermore, the thin-layer surface treatment mixture of the present invention can also be used for black pavements by adding carbon black.

[0014] The thin layer surface treatment mixture of the present invention contains a cationic emulsion. The cationic emulsion is not particularly limited as long as it is an emulsion that exhibits cationic properties. However, from the viewpoint of further enhancing the adhesiveness of the resulting surface treatment layer, a cationic butadiene polymer latex is preferred, a cationic acrylonitrile-butadiene copolymer latex and a cationic styrene-butadiene copolymer latex are more preferred, and a cationic styrene-butadiene copolymer latex is particularly preferred. The cationic styrene-butadiene copolymer latex is an aqueous dispersion in which styrene-butadiene copolymer particles are dispersed in water, and exhibits cationic properties.

[0015] The cationic emulsion preferably has a solid content of 35 to 70% by weight, and more preferably 40 to 55% by weight. twist The cationic emulsion preferably has a pH in the range of 5.0 to 6.9, and more preferably has a pH in the range of 5.5 to 6.5.

[0016] The thin-layer surface treatment mixture of the present invention contains a mortar material in addition to the cationic emulsion. The mortar material used in the present invention contains a rapid-hardening admixture, cement, and fine aggregate.

[0017] The mortar material used in the present invention is not particularly limited as long as it contains a rapid-hardening admixture, cement, and fine aggregate, but it is preferable that the content ratio of each element falls within the following range when quantitatively analyzed by the FP (Fundamental Parameter) method using X-ray fluorescence analysis (XRF). Na: preferably 0.3 to 0.6% by weight, more preferably 0.42 to 0.52% by weight Mg: preferably 0.4 to 0.9% by weight, more preferably 0.58 to 0.68% by weight Al: preferably 3 to 7% by weight, more preferably 4.5 to 5.5% by weight Si: preferably 10 to 35% by weight, more preferably 20 to 28% by weight S: preferably 4 to 11% by weight, more preferably 7 to 8% by weight K: preferably 0.4 to 1.5% by weight, more preferably 0.9 to 1% by weight Ca: preferably 30 to 70% by weight, more preferably 52 to 62% by weight Ti: preferably 0.2 to 0.8% by weight, more preferably 0.48 to 0.58% by weight Fe: preferably 1 to 6% by weight, more preferably 3.1 to 4.1% by weight

[0018] Furthermore, the mortar material used in the present invention preferably has a volume-based median diameter measured by dry particle size distribution measurement using a laser diffraction / scattering method of 300 to 500 μm, more preferably 380 to 480 μm, and even more preferably 415 to 460 μm.

[0019] The rapid-hardening admixture constituting the mortar material used in the present invention is preferably a composition containing calcium aluminate, an inorganic sulfate, and a setting modifier.

[0020] When calcium aluminate comes into contact with cationic emulsions during use, it releases calcium and aluminum ions. These ions react with sulfate ions released from inorganic sulfates to form hydrates such as needle-shaped crystals of ettringite (3CaO·Al2O3·3CaSO4·32H2O) or monosulfate (3CaO·Al2O3·CaSO4·12H2O), thereby improving the early strength development of thin-layer surface treatment mixtures. If the release rate of calcium and aluminum ions from calcium aluminate is too slow, their reactivity with sulfate ions may be impaired, potentially reducing the early strength development of thin-layer surface treatment mixtures. On the other hand, if the release rate of calcium and aluminum ions from calcium aluminate is too high, their reactivity with sulfate ions may be enhanced, resulting in a rapid initial setting time for fast-hardening mortar compositions. This makes it difficult to adjust the initial setting time even with the use of set regulators, potentially limiting the usable life. For this reason, the average particle size (average primary particle size) of calcium aluminate is preferably in the range of 8 to 100 μm.

[0021] The average particle size of calcium aluminate can be measured, for example, using a scanning electron microscope (SEM) and an electron probe microanalyzer (EPMA). That is, calcium aluminate particles contained in the rapid-hardening admixture are identified from SEM images of the rapid-hardening admixture and the results of elemental analysis using EPMA. The particle sizes of the particles identified as calcium aluminate are then measured from the SEM images and the average particle size is calculated. Particles in which only calcium and aluminum are detected by elemental analysis using EPMA can be identified as calcium aluminate particles.

[0022] The calcium aluminate preferably has one or more compositions selected from the group consisting of 12CaO·7Al2O3, 11CaO·7Al2O3·CaF2, and CaO·Al2O3, and has a vitrification rate of 80% or more. The vitrification rate is more preferably 80 to 98%, and particularly preferably 90 to 98%. Calcium aluminate having the above composition and vitrification rate has a high rate of elution of calcium ions and aluminum ions when in contact with water, making it highly reactive and enabling it to reliably improve the early strength development of the thin-layer surface treatment mixture.

[0023] In addition, calcium aluminate has a Blaine specific surface area of ​​3000 to 5500 cm 2 The Blaine specific surface area is preferably 1 / g. The Blaine specific surface area is measured by a specific surface area test using a Blaine air permeation device as described in JIS R5201 "Physical Testing Methods for Cement."

[0024] When the inorganic sulfate contained in the rapid-hardening admixture comes into contact with water during use of the mortar, it releases sulfate ions, which react with calcium ions and aluminum ions released from the calcium aluminate to produce hydrated needle-shaped crystals such as ettringite or monosulfate, thereby improving the early strength development of the thin-layer surface-treated mixture.

[0025] If the dissolution rate of sulfate ions from inorganic sulfate is slow, the reactivity with calcium ions and aluminum ions dissolving from calcium aluminate will be poor, the time from the start of setting to hardening will be long, and the early strength development of the thin layer surface treatment mixture will be poor. For this reason, inorganic sulfates are used when the Blaine specific surface area is 8000 cm 2 / g or more. The Blaine specific surface area of ​​inorganic sulfates is preferably 12000 cm 2 / g or less is preferable.

[0026] The inorganic sulfate is preferably anhydrous gypsum, particularly type II anhydrous gypsum. Anhydrous gypsum (particularly type II anhydrous gypsum) has high reactivity with calcium aluminate, and therefore can more reliably improve the early strength development of the thin-layer surface treatment mixture.

[0027] The set regulator contained in the fast-hardening admixture has the effect of adjusting the time from when the cationic emulsion is added to the mortar to when the mortar starts to set, i.e., delaying the hardening time of the mortar, when the mortar is used. The delay in the hardening time of the mortar due to the set regulator improves the fluidity of the thin-layer surface treatment mixture from when the cationic emulsion is added to the mortar to when the hardening reaction of the mortar progresses.

[0028] The retarding effect of the setting regulator on the setting time of the thin-layer surface treatment mixture is thought to be due to the fact that the setting regulator dissolves in water and undergoes a chelate reaction with the calcium and aluminum ions eluted from the rapid-setting admixture (calcium aluminate), forming a film on the surface of the rapid-setting admixture, temporarily inhibiting the elution of calcium and aluminum ions from the rapid-setting admixture. However, because the film formed on the surface of the rapid-setting admixture is extremely thin, it dissolves and disappears in a relatively short time. After this film disappears, the calcium and aluminum ions begin to eluate again from the rapid-setting admixture, and the setting reaction of the thin-layer surface treatment mixture progresses.

[0029] The setting modifier contained in the rapid-hardening admixture is made up of fine particles with an average particle size (average primary particle size) of 5 μm or less. This allows the setting modifier to dissolve quickly in water over a relatively wide temperature range. The average particle size of the setting modifier is preferably 1 μm or more.

[0030] The set regulator includes one or more of inorganic carbonates, hydroxycarboxylic acids, sodium aluminate, and sodium sulfate. These are easily soluble in water, so by including one or more of these agents in the set regulator, the set regulator's set-regulating effect is exerted early, reliably reducing fluctuations in the initial set time of the fast-hardening mortar composition due to ambient temperature. Furthermore, because the set regulator's set-regulating effect is exerted early, the initial set time is more stable and longer, and the fluidity after adding the cationic emulsion is improved.

[0031] The inorganic carbonate is preferably a carbonate or bicarbonate of an alkali metal. Examples of inorganic carbonates include sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, lithium carbonate, and ammonium carbonate. These inorganic carbonates may be used alone or in combination of two or more. Examples of hydroxycarboxylic acids include tartaric acid, citric acid, malic acid, gluconic acid, and maleic acid. These hydroxycarboxylic acids may be used alone or in combination of two or more.

[0032] The setting modifier is preferably a combination of two or more of inorganic carbonate, hydroxycarboxylic acid, sodium aluminate, and sodium sulfate. A combination of two or more is preferably a triple combination of inorganic carbonate, hydroxycarboxylic acid, and sodium aluminate, and more preferably a quadruple combination of inorganic carbonate, hydroxycarboxylic acid, sodium aluminate, and sodium sulfate. When two or more setting modifiers are combined, it is sufficient that at least one of the setting modifiers is a fine particle with an average particle size of 5 μm or less.

[0033] Among the above-mentioned setting modifiers, sodium sulfate has a particularly fast dissolution rate in water. Therefore, sodium sulfate is highly effective in improving the fluidity of the rapid-hardening mortar composition after adding water. In addition, because sodium sulfate is easily soluble in water over a wide temperature range, it also has the effect of reducing the temperature dependency of the initial setting time after adding a cationic emulsion.

[0034] The fine particles of the set modifier are preferably dispersed in the fast-hardening admixture as primary particles or agglomerated particles close to primary particles. When the set modifier is dispersed as primary particles or agglomerated particles close to primary particles, the dissolution rate in water increases, allowing the set modifier to exert its set modulating effect earlier, thereby reliably reducing fluctuations in the initial set time due to environmental temperature. Furthermore, it is preferable that the fine particles of the set modifier adhere to the surface of the calcium aluminate. In this case, the set modifier comes into contact with water before the calcium aluminate, making it more easily soluble, and allowing the set modifier to exert its set modulating effect earlier, thereby further reliably reducing fluctuations in the initial set time due to environmental temperature.

[0035] The average particle size of the set modifier contained in the fast-setting admixture can be measured, for example, using SEM and EPMA. That is, the particles of the set modifier contained in the fast-setting admixture are identified from the SEM image of the fast-setting admixture and the results of elemental analysis using EPMA, and the particle size of the particles identified as the set modifier is measured from the SEM image and the average value is calculated. For example, particles in which only sodium is detected by elemental analysis using EPMA can be identified as particles of sodium carbonate (inorganic carbonate).

[0036] The amounts of calcium aluminate, inorganic sulfate, and setting regulator contained in the fast-hardening admixture are preferably in the range of 50 to 200 parts by weight of inorganic sulfate and 0.1 to 10 parts by weight of setting regulator per 100 parts by weight of calcium aluminate.

[0037] The fast-hardening admixture can be produced, for example, by a method including a mixing and grinding step of mixing and grinding a clinker containing calcium aluminate with a setting modifier to prepare a mixed and ground product, and a mixing step of mixing the obtained mixed and ground product with an inorganic sulfate.

[0038] Furthermore, the present invention toThe mortar material used contains cement in addition to a rapid-hardening admixture. Examples of cement that can be used include ordinary Portland cement, early-strength Portland cement, moderate-heat Portland cement, low-heat Portland cement, blast-furnace cement, silica cement, fly ash cement, and silica fume cement. One type of cement may be used alone, or two or more types may be used in combination. It is preferable to use Portland cement, especially ordinary Portland cement, as the cement.

[0039] The amount of cement to be mixed is preferably in the range of 100 to 2000 parts by weight per 100 parts by weight of the rapid-hardening admixture. When the amount of cement to be mixed is in the above range, it is possible to achieve a high level of balance between the development of early strength by the rapid-hardening admixture and the development of long-term strength by the cement.

[0040] The mortar material used in the present invention contains fine aggregate in addition to the rapid-hardening admixture. The fine aggregate has the effect of suppressing shrinkage of the hardened body (autogenous shrinkage) that accompanies hardening of the thin-layer surface treatment mixture of the present invention, as well as shrinkage (drying shrinkage) that accompanies moisture dissipation after hardening. The fine aggregate is preferably sand, more preferably sand with a particle size of 150 to 3000 μm, and even more preferably sand with a particle size of 200 to 1500 μm. Alternatively, sand with a particle size of 90 to 1000 μm may be used, or even 90 to 200 μm. By setting the particle size of the fine aggregate within the above range, good mixing performance and good workability can be achieved when mixing the cationic emulsion and the mortar material.

[0041] The amount of fine aggregate to be mixed is preferably in the range of 10 to 67% by mass relative to the total amount of the mortar material. By setting the amount of fine aggregate to be mixed in this range, it is possible to improve the abrasion resistance of the surface treatment layer formed using the thin-layer surface treatment mixture of the present invention while improving the stirring performance when mixing the cationic emulsion and the mortar material.

[0042] In the thin layer surface treatment mixture of the present invention, the blending ratio of the cationic emulsion to the mortar material is preferably 10:90 to 40:60, more preferably 20:80 to 35:65, and even more preferably 22:78 to 28:72, in terms of the weight ratio of "cationic emulsion:mortar material." By setting the blending ratio of the cationic emulsion to the mortar material within the above range, the surface treatment layer formed using the thin layer surface treatment mixture of the present invention can be made to have even more excellent adhesion and durability.

[0043] In addition to the cationic emulsion and mortar material, the thin-layer surface treatment mixture of the present invention may contain other components. For example, by adding a color pigment (e.g., red, yellow, green, blue, orange, etc.), it can be used for colored pavement, and by adding carbon black, it can be used for black pavement. Furthermore, a thickener (viscosity modifier) ​​may be added, which makes it suitable for use as a step repair material. Suitable examples of thickeners include acid clay, kaolin, and attapulgite.

[0044] The thin-layer surface treatment mixture of the present invention is typically prepared by mixing a cationic emulsion and a mortar material using a hand mixer or the like immediately before application. The thus-prepared thin-layer surface treatment mixture of the present invention is then applied to a paved road surface to form a thin surface treatment layer (e.g., 1 to 5 mm thick, preferably 1 to 3 mm thick). Since the thin-layer surface treatment mixture of the present invention contains the above-described cationic emulsion and the above-described mortar material, the surface treatment layer formed using the thin-layer surface treatment mixture of the present invention can be made to have excellent adhesion to the road surface and durability. When adding components other than the cationic emulsion and the mortar material to the thin-layer surface treatment mixture of the present invention, they may be mixed with the cationic emulsion or the mortar material in advance, or they may be added separately when they are mixed.

[0045] In addition, the thin-layer surface treatment mixture of the present invention is usually prepared by mixing a cationic emulsion with a mortar material immediately before application, but in this case, it can be mixed using a hand mixer or the like at the construction site, and the thin-layer surface treatment mixture obtained by mixing can be applied using a rubber rake or the like when applied, eliminating the need for construction machinery and allowing the formation of a surface treatment layer on the road surface with high productivity. Furthermore, even when mixed using a hand mixer or the like, the thin-layer surface treatment mixture of the present invention can ensure excellent fluidity, with a flow rate of approximately 4 to 8 (J14 funnel) seconds, and can also ensure a sufficient usable time, making it suitable for use as a premix type mixture.

[0046] Furthermore, when the thin-layer surface treatment mixture of the present invention is applied to a paved road surface, the cationic emulsion reacts with the mortar material, causing a hardening reaction to occur, thereby forming a surface treatment layer on the paved road surface.In this case, the hardening reaction can proceed at room temperature (5 to 35°C) and in a relatively short time, making it possible to quickly reopen the pavement to traffic, preferably within about 30 to 60 minutes.

[0047] In the present invention, a coating layer may be formed by applying a coating to the surface of the surface-treated layer formed using the thin-layer surface-treatment mixture of the present invention. When a coloring pigment or carbon black is added to the thin-layer surface-treatment mixture, the coating layer can suppress whitening (discoloration) of the surface-treated layer. The coating layer is not particularly limited, but can be formed, for example, by using the cationic emulsion used in the thin-layer surface-treatment mixture of the present invention as a coating agent and coating this on the surface of the surface-treated layer formed using the thin-layer surface-treatment mixture of the present invention. Furthermore, a thickener (viscosity adjuster) may be further added to the coating agent. Suitable examples of thickeners include acid clay, kaolin, and attapulgite. The coating layer is preferably applied to the surface of the surface-treated layer at a pressure of 0.05 to 0.3 kg / m. 2 More preferably, it can be formed at a pressure of 1 to 2 kg / m 2 It can be formed by [Example]

[0048] The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples.

[0049] Example 1 A thin-layer surface treatment mixture was prepared by mixing 25 parts by weight of cationic styrene-butadiene copolymer latex (trade name "Luckstar DS-410", manufactured by DIC Corporation, solids concentration 43-45% by weight, pH 5.5-6.5), 75 parts by weight of mortar material (trade name "MG-11M", manufactured by Mitsubishi Materials Corporation), and 4 parts by weight of carbon black as a colorant using a hand mixer for 1.5 minutes.

[0050] The mortar (product name "MG-11M", manufactured by Mitsubishi Materials Corporation) contains a rapid-hardening admixture, cement, and fine aggregate. Quantitative analysis using X-ray fluorescence (XRF) with the Fundamental Parameter (FP) method (SQX calculation) (using a ZSX Primus X-ray fluorescence analyzer, manufactured by Rigaku Corporation) revealed the following elemental content: Furthermore, the mortar (product name "MG-11M", manufactured by Mitsubishi Materials Corporation) had a volume-based median diameter of 432 μm measured by dry particle size distribution measurement using the laser diffraction / scattering method (using a laser diffraction / scattering particle size distribution analyzer LA-950V2, manufactured by Horiba, Ltd.). Na: 0.47% by weight Mg: 0.63% by weight Al: 5.0% by weight Si: 24% by weight S: 7.5% by weight K: 0.96% by weight Ca:57% by weight Ti: 0.53% by weight Fe:3.6% by weight

[0051] Furthermore, the mortar material (product name "MG-11M", manufactured by Mitsubishi Materials Corporation) is assumed to contain the above-mentioned predetermined amounts of rapid-hardening admixture, cement, and fine aggregate, and the rapid-hardening admixture is assumed to contain the above-mentioned predetermined amounts of calcium aluminate, inorganic sulfate, and calcium aluminate.

[0052] The workable life and curing time of the obtained thin-layer surface treatment mixture were then measured. The obtained measurement results are shown in Figure 1. As is clear from the results in Figure 1, the thin-layer surface treatment mixture of Example 1 had a sufficiently long workable life at room temperature (5 to 35°C) and a short curing time of within 60 minutes. In this test, at each measurement temperature of the thin-layer surface treatment mixture, the workable time was defined as the time after the start of mixing until it became impossible to work with a rubber rake, and the curing time was defined as the time after spreading and leveling until the thin-layer surface treatment mixture no longer adhered to the tire.

[0053] The resulting thin-layer surface-treated mixture was used to prepare 30cm x 30cm x 5cm hardened specimens, which were then used to measure and evaluate abrasion resistance (dimensions: inner diameter 255mm x thickness 5mm), slip resistance, torsion resistance, and flow resistance. The evaluation results are as follows, and all of them showed sufficient properties. Abrasion resistance: 71g / m 2 Slip resistance (BPN value): 70 Torsion resistance: 0.05% Fluid resistance (Ds value): 21000 End

[0054] Abrasion resistance was measured using the wet track abrasion test (JEAAT-1, Japan Asphalt Emulsion Association), and skid resistance was measured using the pendulum skid resistance measurement method (S021-2, Pavement Testing and Investigation Method Handbook, published by the Japan Road Association). Torsional resistance was measured according to the Torsional Resistance Measurement Method (Pavement Performance Evaluation Method Supplement, published by the Japan Road Association), and flow resistance was measured according to the WT test method (Pavement Testing and Investigation Method Handbook, published by the Japan Road Association).

[0055] The resulting thin-layer surface treatment mixture was applied to both asphalt pavement (As pavement) and concrete pavement (Co pavement) to form a thin surface treatment layer 5 mm thick, and the adhesive strength was measured. In this case, a coating agent containing 100 parts by weight of cationic styrene-butadiene copolymer latex (trade name "Luckstar DS-410", manufactured by DIC Corporation) and 4 parts by weight of a thickener was applied to the surface treatment layer at a rate of 0.15 kg / m. 2 A coating layer was formed using the above method. The measurement results obtained are shown in a graph in Figure 2, along with the results of Comparative Example 1, which will be described later. As shown in Figure 2, the thin surface treatment layer obtained using the thin-layer surface treatment mixture of Example 1 exhibited high adhesive strength to both asphalt pavement surfaces (As pavement) and concrete pavement surfaces (Co pavement). The adhesive strength was measured in accordance with the tensile adhesion test (JEAAT-5, Japan Asphalt Emulsion Association).

[0056] The resulting thin-layer surface treatment mixture was applied to an asphalt pavement (As pavement, a parking lot within the Maeda Road Technology Research Institute) to form a thin surface treatment layer 3 mm thick, and a long-term durability test was conducted. In this test, a coating agent containing 100 parts by weight of cationic styrene-butadiene copolymer latex (trade name "Luckstar DS-410", manufactured by DIC Corporation) and 4 parts by weight of a thickener was applied to the surface treatment layer at a rate of 0.15 kg / m. 2 As a result of long-term durability tests, no scattering or peeling was observed for over a year after application and use, confirming the excellent durability of the coating.

[0057] <Example 2> A thin-layer surface treatment mixture was obtained in the same manner as in Example 1, except that 3.75 parts by weight of red colorant was further added instead of 4 parts by weight of carbon black, and the mixture was evaluated in the same manner. It was confirmed that the same effects as in Example 1 were obtained.

[0058] Example 3 A thin-layer surface treatment mixture was obtained in the same manner as in Example 1, except that 3.75 parts by weight of a yellow colorant was further added instead of 4 parts by weight of carbon black, and the mixture was evaluated in the same manner. It was confirmed that the same effects as in Example 1 were obtained.

[0059] Example 4 A thin-layer surface treatment mixture was obtained in the same manner as in Example 1, except that 3.75 parts by weight of green colorant was further added instead of 4 parts by weight of carbon black, and the mixture was evaluated in the same manner. It was confirmed that the same effects as in Example 1 were obtained.

[0060] <Example 5> In the measurement of adhesive strength and long-term durability test, a thin-layer surface treatment mixture was obtained in the same manner as in Example 1, except that a coating layer was not formed, and the evaluation was carried out in the same manner. It was confirmed that the same effects as in Example 1 were obtained.

[0061] Example 6 A thin-layer surface treatment mixture was obtained and evaluated in the same manner as in Example 1, except that the amount of cationic styrene-butadiene copolymer latex (trade name "Luckstar DS-410", manufactured by DIC Corporation) was 20 parts by weight, the amount of mortar material (trade name "MG-11M", manufactured by Mitsubishi Materials Corporation) was 80 parts by weight, and no colorant or thickener was added. It was confirmed that the same effects as in Example 1 were obtained. In Example 6, no coating layer was formed in the adhesion strength measurements and long-term durability tests.

[0062] <Comparative Example 1> A thin-layer surface-treated mixture was obtained in the same manner as in Example 1, except that 14.3 parts by weight of an acrylic resin emulsion and 85.7 parts by weight of polymer cement were used instead of the cationic styrene-butadiene copolymer latex (trade name "Luckstar DS-410", manufactured by DIC Corporation) and mortar material (trade name "MG-11M", manufactured by Mitsubishi Materials Corporation). Adhesion strength was measured in the same manner as in Example 1. The results obtained are shown graphically in Figure 2.

Claims

1. A thin-layer surface treatment mixture for a road surface, comprising a cationic emulsion and a mortar material, the cationic emulsion is a latex of a cationic butadiene-based polymer, The mortar material includes a rapid-hardening admixture, cement, and fine aggregate, A thin-layer road surface treatment mixture, in which the cationic emulsion and the mortar material are blended at a weight ratio of "cationic emulsion:mortar material" of 20:80 to 40:

60.

2. 2. The thin layer surface treatment mixture of claim 1, wherein said cationic emulsion is a latex of a cationic styrene-butadiene copolymer.

3. 3. The thin layer surface treatment mixture according to claim 1, further comprising a color pigment.

4. 4. The thin-layer surface treatment mixture according to claim 1, further comprising carbon black.

Images