JP4773111B2 - Color crack sealant for paving - Google Patents

Description

  The present invention relates to a color crack sealing material for paving, and in particular, to a color crack sealing material for paving that is toned in a color tone similar to the surface of the paving and does not show a seal mark.

  The surface of the road pavement is not only subjected to weather effects such as sunlight including ultraviolet rays, rainfall, and snowfall, but is also subjected to extremely severe conditions that repeatedly receive loads from traffic vehicles. For this reason, it is not an exaggeration to say that once the pavement is constructed, the deterioration starts immediately, and it is inevitable that cracks will occur on the pavement surface sooner or later.

  Once cracks occur on the pavement surface, rainwater penetrates into the pavement from the cracks, causing separation of asphalt and aggregates, or even soaking into the roadbed to soften the roadbed and support the pavement. It will cause a decline in power. The decrease in pavement bearing capacity further promotes the generation of cracks on the pavement surface, and a vicious cycle in which rainwater penetrated from newly generated cracks further reduces the bearing capacity is repeated, significantly reducing the pavement life. The Rukoto. For this reason, the crack which generate | occur | produced on the pavement surface needs to be repaired at an early stage.

  Usually, repair of a crack generated on a pavement surface is performed by injecting and filling a water-proof sealing material into the crack. For example, a normal temperature injection type sealing material as disclosed in Patent Document 1 or a patent A heat injection type sealing material as shown in Document 2 is used. However, the normal temperature injection type sealing material has a drawback that the volumetric shrinkage after being filled in the cracks is large, so that a sufficient water-stopping effect cannot be obtained, and the surface remains sticky after filling. When it is used, the black stains in a relatively short period of time, and the seal mark is noticeably detrimental.

  On the other hand, the heat-injection type sealing material is sufficiently satisfactory in terms of water-stopping effect, but has the problem that it is essentially black because the asphalt is the main component and the seal mark is finished black. That is, the surface of normal asphalt pavement has a structure in which asphalt mortar is scattered in the gaps of the aggregate, and generally has a color close to black gray. The surface of ordinary cement concrete pavement is gray. If such a crack generated on the black-gray or gray pavement surface is filled with a conventional heat-injection type sealing material and sealed, the seal mark will stand out black, not only detracting from the pavement aesthetics, but also the black seal. The driver misidentifies the mark as a fallen object and may suddenly turn the steering wheel or apply a brake, which is not preferable from the viewpoint of traffic safety.

In addition, when repairing cracks that have occurred in color pavements that have been adopted everywhere in recent years, the use of conventional heat-injection-type sealing materials will result in blackened seal marks, disturbing the harmony of colors, and aesthetics. There is a disadvantage that it is not preferable for safety. Furthermore, the pavement seam in the longitudinal direction of the road has a poor adhesive strength and is a part that spreads early and is likely to crack, but this pavement seam in the longitudinal direction of the road is usually a road center line, that is, a center line. It is often provided at the same position, and cracks are generated on the white or yellow center line. Sealing such a crack on the white or yellow center line with a black heat-injection type sealant will not only make the seal mark stand out, but it will not be aesthetically pleasing, and the visibility of the lane marking will deteriorate. The above is also not preferable. Similarly, when repairing cracks in white road markings such as pedestrian crossings and parking-prohibited areas, the use of black heat-injection-type seals makes the seal marks conspicuous and desirable. It wasn't.
JP 61-157521 A JP 63-60307 A

  The present invention was made in order to solve the problems of the conventional crack sealing material as described above, has a sufficient water-stopping effect, and has no noticeable seal marks. It is a problem to provide.

  The present invention provides the above-mentioned problem by providing a color crack sealing material for pavement formed by blending an anti-peeling agent, an adhesion inhibitor, and an inorganic filler in addition to a thermoplastic resin, a tackifier, and a plasticizer. It is a solution.

  In the color crack sealing material for paving of the present invention, it is desirable to mix a colored inorganic filler as the inorganic filler, and a part or all of the inorganic filler is one or more kinds of colored fillers. By using an inorganic filler, the color tone of the color crack sealing material for paving of the present invention can be adjusted to various desired color tones. However, it is needless to say that the color tone obtained by the above blending may be used without blending the colored inorganic filler.

  As a mixing ratio of each component, 0.1 to 10 parts by mass of an anti-peeling agent, 1 to 20 parts by mass of an adhesion inhibitor, and 100 parts by mass with respect to a total of 100 parts by mass of a thermoplastic resin, a tackifier, and a plasticizer. The blending ratio of 10 to 50 parts by mass of the system filler is preferable, and the breakdown of the total of 100 parts by mass of the thermoplastic resin, the tackifier, and the plasticizer is 10 to 50 parts by mass of the thermoplastic resin and the tackifier. It is preferable to make 10-80 mass parts and a plasticizer into the ratio of 10-80 mass parts.

  According to the color crack sealing material for pavement of the present invention, since each component as described above is blended, the seal surface is less sticky, peels off, tires of traveling vehicles, etc. It is possible to adjust the color to match the color of the pavement surface to be repaired, so that the seal marks are not noticeable and the aesthetics of the pavement are not impaired. And the visibility of the various road markings displayed on the road is not impaired, and drivers do not mistake the seal mark as a fallen object and do not turn the steering wheel or apply the brake suddenly. There is an advantage that it is extremely preferable in terms of traffic safety.

  As described above, the color crack sealing material for paving according to the present invention comprises a thermoplastic resin, a tackifier, a plasticizer, an anti-peeling agent, an adhesion inhibitor, and an inorganic filler. Accordingly, a colored inorganic filler is included as the inorganic filler. Each compounding component will be described as follows.

  Examples of the thermoplastic resin that can be used in the color crack sealing material for pavement of the present invention include styrene resins such as SIS, SBS and hydrogenated products thereof, ethylene / ethyl acrylate copolymer (EEA), ethylene / acrylic acid. Examples include ethylene resins such as copolymers (EAA) and ethylene vinyl acetate copolymers (EVA), polyester resins, and nylon resins, and these thermoplastic resins are used alone. Alternatively, two or more kinds may be used in combination.

  Examples of the tackifier that can be used in the color crack sealing material for paving of the present invention include aliphatic petroleum resins, aromatic petroleum resins, alicyclic petroleum resins, hydrogenated petroleum resins, rosin resins, terpene resins, and styrene. Resin, isoprene-based resin, coumarone-indene resin, etc., and any one of these tackifiers may be used alone, or two or more thereof may be used in combination.

  Examples of the plasticizer that can be used in the color crack sealing material for pavement of the present invention include aliphatic oil, aromatic oil, alicyclic oil, cylinder oil, etc., and these plasticizers are any one of them. May be used alone or in combination of two or more.

  Examples of the peeling inhibitor that can be used in the color crack sealing material for pavement of the present invention include surfactants such as amines, amides, and quaternary ammonium salts, and phosphate esters, and these peeling inhibitors. May be used alone or in combination of two or more.

  Examples of the adhesion inhibitor that can be used in the color crack sealing material for paving of the present invention include paraffin wax, microcrystalline wax, Fischer-Tropsch wax, polyethylene wax, polypropylene wax, and the like. Any one of them may be used alone, or two or more of them may be used in combination.

  Examples of the inorganic filler that can be used in the color crack sealing material for pavement of the present invention include calcium carbonate, barium carbonate, barium sulfate, Neuburg clay, clay, and colored inorganic fillers also known as pigments. Some titanium oxide, carbon black, zinc oxide, white lead, graphite, cadmium red, molybdenum orange, ferric hydroxide, yellow iron oxide, yellow lead, chromium oxide, chromium green, ultramarine, bitumen, cobalt blue, manganese violet, etc. These inorganic fillers may be used alone or in combination of two or more thereof. Among them, since titanium oxide is white and carbon black is black, if these are appropriately blended and used, the color tone of the color crack seal for pavement of the present invention can be as white as road markings such as pedestrian crossings and asphalt There is an advantage that it can be adjusted to black gray or gray which is close to the surface color of pavement or cement concrete pavement. In addition, for example, cadmium red and ferric oxide are red, and iron oxide yellow is yellow. If these are appropriately selected or used in combination, they will occur on red colored pavements or on the yellow center line. Even when used for repairing cracks and the like, a color crack sealing material for pavement can be obtained in which seal marks are not noticeable. The colored or non-colored inorganic filler as described above is merely an example, and various other colored or non-colored inorganic materials that are usually used for the pavement color crack seal material of the present invention. It goes without saying that fillers can be used.

  As long as the crack sealing material obtained by blending can be used as a crack sealing material for paving, the mixing ratio of the above components is not particularly limited, but there is little stickiness on the seal surface, and peeling from the cracks is also possible. In addition, from the viewpoint of obtaining a paving color crack sealing material excellent in water-stopping and durability, 0.1 to 0.1 parts of the anti-peeling agent with respect to a total of 100 parts by mass of the thermoplastic resin, the tackifier, and the plasticizer. It is preferable to mix 10 parts by mass, 1 to 20 parts by mass of an adhesion inhibitor, and 10 to 50 parts by mass of an inorganic filler.

  If the anti-peeling agent is less than 0.1 parts by mass, the anti-peeling effect is not effective. On the other hand, if it exceeds 10 parts by mass, the anti-peeling effect is not improved so much and is not economical. On the other hand, if the adhesion inhibitor is less than 1 part by mass, the adhesion suppressing effect is not obtained, and the seal surface becomes sticky, which is not preferable. On the other hand, when the adhesion inhibitor exceeds 20 parts by mass, the adhesive force to the inner surface of the crack of the sealing material is weakened, and the sealing material is easily peeled off. If the inorganic filler is less than 10 parts by mass, not only the wear resistance of the sealing material becomes inferior, but also the sticking surface is felt, which is not preferable. On the other hand, when the amount of the inorganic filler exceeds 50 parts by mass, the amount of the filler is too large, the viscosity is increased, and workability is inferior. In addition, when a colored inorganic filler is used as the inorganic filler, the entire amount of the inorganic filler may be used as the colored inorganic filler, but as long as the desired color tone is obtained, the inorganic filler It is economically preferable that the amount of the colored inorganic filler occupying is less than 10 parts by mass, preferably 7 parts by mass or less, and is preferably used in combination with a non-colored inorganic filler.

  The total of 100 parts by mass of the thermoplastic resin, the tackifier, and the plasticizer is 10 to 50 parts by mass of the thermoplastic resin, 10 to 80 parts by mass of the tackifier, and 10 to 80 of the plasticizer. It is preferable to make it the ratio of a mass part. If the amounts of these three components are out of this range, a sufficient water-stopping effect cannot be obtained, and workability and heat stability are deteriorated, which is not preferable.

  Hereinafter, the color crack sealing material for paving of the present invention will be described in more detail with examples.

<Examples 1-3>
With the formulation shown in Table 1 below, each material was dissolved and mixed while being heated in a heating kettle to produce pavement color crack seal materials 1 to 3 according to the present invention. The color crack seal materials for the three types of pavement produced were slightly light gray in Example 1, gray in Example 2, black gray in Example 3, and cement concrete pavement or asphalt. It was similar to the surface color of the pavement.

<Comparative Examples 1-2>
With the formulation shown in Table 2 below, each material was dissolved and mixed while being heated in a heating kettle to produce sealing materials of Comparative Examples 1 and 2. In addition, the sealing material of the comparative example 1 is a conventional heat injection type sealing material, and the color tone was black. On the other hand, the sealing material of Comparative Example 2 was a commonly used resin binder, and the color tone was light brown.

<Tensile adhesion test>
Using the color crack sealing material for paving of Examples 1 to 3 and the sealing material of Comparative Examples 1 and 2, a tensile adhesion test was performed in accordance with the adhesion strength test method defined in JIS K5400. That is, each of the sealing materials of Examples 1 to 3 and Comparative Examples 1 and 2 heated to about 200 ° C. is applied to one side of a steel plate having a size of 70 × 70 × 20 mm to a thickness of about 3 mm, and the test temperature is set. Then, a steel jig for pulling was placed thereon, and a weight of about 1 kg was placed thereon, and left still for 24 hours. After standing, remove the weight, make a 40x40mm size around the jig, make a cut reaching the steel plate, set it in a tensile tester in that state, and apply a tensile load to the steel plate in the vertical direction The maximum tensile load was measured. The tensile bond strength A (MPa) was obtained from the measured maximum tensile load T (N) by the following calculation formula, and the average value of the results obtained three times for each sealing material was obtained. Two test temperatures, 5 ° C. and 20 ° C., were used. The results are shown in Table 3.
a formula:
A (MPa) = {T ( N) / 16 (cm 2)} × 10 4/10 6

  As shown in Table 3, each of the sealing materials of Examples 1 to 3 showed a high tensile adhesive strength of 1.5 MPa or more at a test temperature of 5 ° C. and 0.8 MPa or more at a test temperature of 20 ° C. Compared to the sealing material of Comparative Example 1 which is a conventional heat-injection type sealing material, the tensile adhesive strength is equal to or higher than that, and the color crack sealing material for paving of the present invention is used as a crack sealing material. It adheres strongly to the pavement surface and is difficult to peel off, indicating that it has high water-stopping and durability. On the other hand, the sealing material of Comparative Example 2, which is essentially only a resin binder, has a tensile adhesive strength as low as 1.1 MPa at 5 ° C. and 0.5 MPa at 20 ° C., which is a high tensile adhesive required for crack sealing materials. It was found that it did not meet the strength requirements.

<Adhesion test>
Using the color crack sealing material for pavement of Examples 1 to 3 and the sealing material of Comparative Examples 1 and 2, an adhesion test was performed by the method described below. That is, after applying a celluloprimer on the surface of a concrete plate having a size of 30 × 30 × 4 cm and drying, a mold having a size of 4 × 6 × 0.3 cm is set on the concrete plate, Then, each of the sealing materials heated to about 200 ° C. was poured, cooled to room temperature, removed from the mold, and cured at a test temperature of 60 ° C. for 2 hours. After curing, a rubber sheet (15 x 15 x 0.1 cm) with a known mass is placed on the sealing material, and a corrugated rubber plate (30 x 30 x 1 cm) is placed on it, and the wheel tracking test is performed on it. The solid tire was traversed 5 times, and after traversing, the rubber sheet was peeled off and the mass of the sealing material adhering to the rubber sheet was measured. The adhesion rate (%) was determined by the following calculation formula, and the average value of the results obtained three times for each sealing material was determined. The results are shown in Table 4.
a formula:
Adhesion rate (%) = {(mass of peeled rubber sheet−mass of initial rubber sheet) / (mass of sealing material poured into mold)} × 100

  As shown in Table 4, all of the sealing materials of Examples 1 to 3 had an adhesion rate of 0.0, and did not peel off at all without adhering to the rubber sheet placed thereon. The sealing material of Comparative Example 1 which is a heat-injection type sealing material showed an adhesion rate of 23.3%, resulting in about 1/4 of the sealing material being adhered to the rubber sheet and peeling off. In addition, the sealing material of Comparative Example 2, which is only a resin binder, shows an adhesion rate as high as 70%, and most of the sealing material adheres to the rubber sheet and is peeled off by the five-way traverse traveling of the solid tire. The result was obtained. As is apparent from the results, the color crack sealing material for pavement of the present invention has an extremely excellent seal that has no stickiness on the sealing surface and hardly adheres to the tire even when the vehicle tire travels on the sealing surface. It is a material.

<Penetration test>
Using the sealing material of Example 3 and the sealing material of Comparative Example 1, a permeability test was performed in the following manner. That is, two glass plates having a length of 100 mm and a width of 200 mm are overlapped, vertically oriented so that the side of the width of 200 mm is up and down, and both ends of the upper sides of the two glass plates that are erected. A spacer having a thickness of 2.5 mm is inserted between the glass plates facing each other to form a wedge-shaped space having an upper opening between the two glass plates. Next, a sealing material to be tested for permeability is injected into the wedge-shaped space from the top over a width of about 130 mm, and when the injected sealing material penetrates the wedge-shaped space and a space is formed at the top, The operation | work which inject | pours a sealing material into a wedge-shaped space part is repeated, and it confirms that the sealing material was filled to the upper part of the wedge-shaped space part, and complete | finishes an injection | pouring operation | work. When the injection operation was completed, the depth at which the sealing material penetrated into the wedge-shaped space was measured over an injection width of about 130 mm, and the lowest value of the penetration depth was taken as the penetration depth of the sealing material. The penetration test is performed twice for each viscosity by heating each sealing material and adjusting the viscosity to 1 Pa · s or 0.5 Pa · s. The average value was obtained. The results are shown in Table 5.

  As shown in the results of Table 5, the sealing material of Example 3 which is the color crack sealing material for paving of the present invention has the same viscosity as that of the sealing material of Comparative Example 1 which is a conventional heat injection type sealing material. When compared with the above, it can be seen that the penetration depth is substantially the same, the permeability is excellent, and it can be sufficiently used as a crack sealing material.

<Workability test>
The sealing material of Example 3 and the sealing material of Comparative Example 1 were heated to each temperature, and the viscosity at each temperature serving as a measure of workability was measured. The viscosity was measured using a double cylindrical rotational viscometer. The results are shown in Table 6.

  As can be seen from the results in Table 6, the sealing material of Example 3 which is a pavement color crack sealing material of the present invention has a higher temperature viscosity than the sealing material of Comparative Example 1 which is a conventional heat injection type sealing material. Although it is slightly higher, it is understood that the viscosity has no problem in the injection work and has good workability.

<Heating stability test>
Using the sealing material of Example 3 and the sealing material of Comparative Example 1, each sealing material was heated to 260 ° C., held for 4 hours, and cooled to room temperature three times, and then three times. The penetration, softening point, and fructose embrittlement point before and after were measured, and the degree of deterioration by heating, that is, the heating stability was tested. In addition, all of the measurement of the penetration, the softening point, and the Frath embrittlement point were performed according to the measuring method prescribed | regulated to JISK2207. The results are shown in Table 7.

  As shown in the results of Table 7, the sealing material of Example 3 which is the color crack sealing material for paving of the present invention is heated to 260 ° C., held for 4 hours and then cooled for 3 hours, and then subjected to three thermal cycles. It can be seen that the properties of penetration, softening point, and fructose embrittlement point are almost unchanged, and the heat stability is extremely excellent. On the other hand, the sealing material of Comparative Example 1, which is a conventional heat injection type sealing material, has undergone a similar thermal cycle, but its characteristics have deteriorated slightly, but in terms of heating stability, The result showed that the color crack sealing material for paving was superior to the conventional heat injection type sealing material.

<Example 4>
With the formulation shown in Table 8, each material was dissolved and mixed while heating in a heating kettle to produce a sealing material of Example 4 which is a color crack sealing material for paving of the present invention. The color tone of the manufactured sealing material is light gray, and even if it is injected and filled in a crack generated on the surface of the cement concrete pavement, the seal mark does not stand out.

<Example 5>
With the formulation shown in Table 9, each material was dissolved and mixed while being heated in a heating kettle to produce a sealing material of Example 5 which was a color crack sealing material for paving of the present invention. The color tone of the manufactured sealing material is red, and even if it is injected and filled in a crack generated on the surface of the red color pavement, the seal mark does not stand out.

<Example 6>
With the formulation shown in Table 10, each material was dissolved and mixed while being heated in a heating kettle to produce a sealing material of Example 6 which is a pavement color crack sealing material of the present invention. The color tone of the manufactured sealing material is yellow, and even if it is injected and filled in the crack generated on the yellow center line, the seal mark does not stand out.

  As described above, the color crack sealing material for pavement of the present invention can be adjusted freely in color and can be matched with the surface color of the pavement to be repaired, so asphalt pavement, cement concrete pavement, color Even if it is used for repairing cracks that have occurred on any pavement, or for repairing cracks that have occurred on white or yellow center lines, or on white road markings such as pedestrian crossings, after repair In addition to the fact that the seal mark does not stand out and does not impair the aesthetics of the existing pavement, the driver of the vehicle misidentifies the seal mark as a fallen object and applies a sudden handle or brake. It is extremely useful for traffic safety without impairing the visibility of the center line and road markings. In addition, the pavement color crack seal material of the present invention has an excellent water-stopping effect, and its seal surface has less stickiness, so that it adheres to the vehicle tire running on the seal surface and stains the tire. A good water-stopping effect can be sustained over a long period of time without peeling off. In this way, pavement color crack seal material is effective for repairing cracks in existing pavements, and can be used for repairing cracks not only on roads, but also in parking lots, airfields, container yards, open spaces, and promenades. It is a very useful material for the maintenance of these roads.

Claims (2)

In addition to a thermoplastic resin, a tackifier, and a plasticizer, a color crack sealing material for paving comprising an anti-peeling agent, an adhesion inhibitor, and an inorganic filler , the thermoplastic resin, the tackifier, and 0.1 to 10 parts by weight of anti-peeling agent, 1 to 20 parts by weight of tackiness inhibitor, and 10 to 50 parts by weight of inorganic filler for a total of 100 parts by weight of plasticizer, thermoplastic resin The total of 100 parts by mass of the tackifier and the plasticizer is 10 to 50 parts by mass of the thermoplastic resin, 10 to 80 parts by mass of the tackifier, and 10 to 80 parts by mass of the plasticizer. Color crack sealant for paving .   The color crack sealing material for pavements according to claim 1, comprising a colored inorganic filler as the inorganic filler.