JPH0892913A - Repair method for water-permeable pavement materials - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a method for giving sufficient strength to a water-permeable pavement material having an deteriorated upper layer and repairing it with a beautiful finished appearance. [Structure] The surface of an existing water-permeable pavement material is impregnated with an impregnating resin whose main material is thixotropic resin. The impregnating resin is filled in the gaps between the aggregates and does not flow down to the lower layer, increasing the bonding force between the aggregates and increasing the strength of the surface layer portion. The impregnating resin includes a mixture of fine-grained aggregate and short fibers, and by using a pigment-added resin, a natural and beautiful paved surface can be obtained by utilizing the texture of the existing aggregate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair method for effectively increasing the strength of the surface layer of a water-permeable pavement material and preventing the aggregate from falling off.

[0002]

2. Description of the Related Art Construction of a water-permeable pavement floor is performed by using an aggregate made of bean gravel (natural stone) or a ceramic fired body with an epoxy resin,
A thermosetting resin such as polyester resin is appropriately mixed as a binder, and the mixture is applied to the lower ground such as concrete or asphalt and paved with a metal trowel or a mechanical trowel retainer.

In this case, a resin having a relatively low viscosity is often used as a binder for reasons such as the mixing of aggregates and the ease of work during construction. Therefore, pavement is performed before the resin is cured. The amount of resin in the surface layer became extremely small as it flowed down to the lower layer of the material, and the strength of the surface layer was apt to decrease, and it was particularly easy to drop the aggregate in the corners of the pavement material and around cracks. Further, due to deterioration over time, the aggregate may fall off due to the wear of the resin in the surface layer and the reduction in strength.

[0004] As a repairing method for preventing the fall of aggregates on the surface layer in advance, or for preventing the fall of pavement materials in which aggregates have already fallen off, the features of existing pavement materials have been conventionally used. In order to leave the pavement material, the same resin as that used for the existing pavement material was used, and this was directly applied to the surface of the pavement material to increase the amount of resin in the surface layer of the pavement material and to increase the bonding strength of the aggregate.

[0005]

However, in the above repair method, since the applied resin easily flows down from the gap of the aggregate to the lower layer of the pavement material, the application should be repeated a plurality of times to sufficiently increase the strength of the surface layer. There is a problem in that it has to be performed, which requires a lot of man-hours and labor. Further, when the amount of resin applied increases and a large amount of resin adheres to the surface aggregate, the non-slip property of the surface of the pavement material decreases, and slippage easily occurs. Therefore, after applying the resin, it is necessary to spray fine-grained aggregate on the surface of the pavement material, and apply the resin again on the paving material to make the surface layer less slippery. As described above, the conventional repair method has a problem that a large number of man-hours, labor and a large amount of resin are required, resulting in a large repair cost.

In addition, when repairing a pavement material that has been used for a long time, dirt on the surface of the pavement material is thoroughly cleaned by high-pressure water cleaning, etc., but it is difficult to completely remove the dirt adhering to the surface of the aggregate. It was often the case that the resin had to be applied with the stains still attached. In this case, in the conventional repair method, stains on the surface of the pavement material become more conspicuous due to the application of the resin, and the finish feeling after repair is significantly impaired.

The present invention has been made in view of the above problems, and can effectively and sufficiently enhance the bonding force between the aggregates of the upper layer of the pavement material and also provide a suitable friction resistance on the surface. Another object of the present invention is to provide a method of repairing a water-permeable pavement material that can be repaired to a beautiful pavement surface that makes the best use of the texture of the aggregate material and is excellent in workability and workability.

[0008]

In order to solve the above problems, the inventors of the present invention have earnestly studied to sufficiently impregnate the gap between the aggregates with the coating resin to reduce the drooling of the resin. As a result, it was found that by giving thixotropic property to the resin as the binder and impregnating it with the surface of the pavement material, the resin is surely cured at the surface layer of the pavement material, and the strength of the surface layer can be sufficiently increased. Completed the invention.

The term "thixotropic" as used in the present invention means a colloidal dispersion in which a gel is formed in a stationary state at a constant temperature and becomes a sol when an external force is applied (stirring) to reduce the viscosity. Reversible property. In addition, with "thixotropic agent",
It is an additive that gives the above-mentioned properties to the resin when mixed with the resin, and is different from a thickener that merely increases the viscosity of the resin by mixing.

The repair method of the present invention is characterized by impregnating the surface of the pavement material to be repaired with a thixotropic resin. As the resin used in the present invention, a thermosetting resin such as epoxy, polyester, vinyl ester, MMA or the like which can be used at room temperature can be used.

Examples of the thixotropic agent added to impart thixotropy to the resin include, for example, a fatty acid dimer ester such as DISPARON # 3600 (Kusumoto Kasei Co., Ltd., trade name), Aerosil # 2 (Nippon Aerosil Co., Ltd.). ) ・ Product name) etc., colloidal silica type, SA-1000 (Kyoeisha Chemical Co., Ltd.), etc. Amide wax type, Milcon MS-2 (Showa Mining Co., Ltd., product name), etc. System, fatty acid-treated calcium carbide-based, oxidized polyethylene wax-based liquid, granular, etc.
Alternatively, they can be used in combination.

The required thixotropy is 10 to 60 ° C.
2 atmosphere, the number of revolutions measured by B-type rotational viscometer is 2 rp
The ratio of the viscosity at 20 rpm to the viscosity at m, that is, the thixotropic index is preferably 2.0 or more and 6.0 or less. More preferably, the thixotropic index is 2.0 or more and 4.0 or less, and the viscosity at 20 ° C. is 20 at a measured rotation speed of 20 rpm.
000 cps. If the thixotropic index is smaller than the above range, the resin tends to flow, and the resin cannot be effectively cured at the surface layer of the pavement material, and if it is larger than the above range, the resin only adheres to the surface of the pavement material. Therefore, it becomes impossible to sufficiently impregnate the aggregates in the surface layer portion.

In the repair method of the present invention, the surface of the paving material is impregnated with a small amount of fine aggregate or short fibers, or a mixture of both with the above-mentioned thixotropic impregnating resin, and a preferable friction is applied to the coated surface. The feature is that the characteristics are given. The fine aggregate to be mixed has an average particle size of about 1 mm or less, for example, natural stone or silica sand having a particle size of 0.1 to 1.0 mm, natural or artificial such as a fired balloon having a particle size of 0.005 to 0.3 mm. Aggregates can be used.

The mixing amount of the fine-grained aggregate is preferably 2 to 20 parts by weight with respect to 100 parts by weight of the resin. If the amount is less than 2 parts by weight, the amount of the fine aggregate aggregate that hardens on the resin surface portion is too small to increase the frictional resistance of the resin surface. On the other hand, if the amount is more than 20 parts by weight, the viscosity of the resin to be impregnated will be excessively increased and the workability will be deteriorated, and the gaps of the paving material will be filled with the fine-grained aggregate, which will impair the water permeability.

The short fibers to be mixed are carbon fibers,
There are glass fibers, synthetic polymer fibers such as vinylon and rayon, and those having a length of about 0.5 to 3.0 mm can be used. The mixing amount of short fibers is 100
It is preferable that the mixing ratio is 0.1 to 1.0 part by weight with respect to parts by weight. If the amount is less than 0.1 part by weight, the surface reinforcing effect cannot be obtained, and if the amount is more than 1.0 part by weight, a large amount of excess fibers remain on the surface, which causes a loss of aesthetics.

The mixing ratio in the case of forming the paving material by mixing the fine-grain aggregate and the short fibers with resin is also the same as above.

Further, the repairing method of the present invention is characterized by impregnating from the surface of the pavement material a mixture of the above thixotropic resin and a small amount of pigment. The pigment to be mixed can be selected according to conditions such as the hue of the paving material and the state of stains. The mixing ratio of the pigment is 100 parts by weight of the resin,
It is preferably 0.5 to 5.0 parts by weight. If the amount is less than 0.5 parts by weight, the color becomes light and the mixing effect cannot be obtained.
If it is more than 0 parts by weight, the hue is too strong and the texture of the surface of the existing pavement material is lost.

The thixotropic resin and the mixture thereof are
It is preferable to appropriately impregnate the surface of the repair pavement material at a rate of 0.3 to 1.5 kg / m ² with a roller brush or an airless coater. 0.3 kg / m ² less reinforcing effect is less, the water permeability is lowered by 1.5 kg / m ² or more.

[0019]

[Function] By using a thixotropic resin, the impregnated resin is less likely to drip and a sufficient amount of resin is secured at the surface layer of the pavement material, increasing the bond strength between the aggregates at the surface layer and ensuring The strength can be recovered.

When thixotropy is applied to the above impregnated resin, the amount of resin in the surface layer portion increases and the surface becomes slippery easily. However, when the resin is mixed with fine-grained aggregate, the friction resistance on the surface increases. This is because the fine-grained aggregate or the short fibers are hardened on the surface of the pavement material and appropriate irregularities are formed on the surface, so that the non-slip property is imparted.

By mixing fine-grained aggregates or short fibers with the above-mentioned impregnated resin, fine-grained aggregates or short fibers are appropriately dispersed in the voids between the aggregates in the surface layer of the pavement material to increase the contact area. Therefore, the strength of the paving material can be increased. When short fibers are mixed, the aggregates are directly bonded by the short fibers, so that the strength of the paving material is further increased.

By mixing the above-mentioned impregnating resin with a pigment, stains and the like on the surface aggregate become less noticeable, and a natural and beautiful paved surface can be obtained in which the taste and texture of the existing paving material are fully utilized.

[0023]

EXAMPLES The present invention will be specifically described below based on examples. Epoxy resin A (base / hardening agent = 10) having the characteristics shown in Table 1 which is usually used as a binder for water-permeable pavement materials.
0/20, see Table 1) and aggregate (natural cobblestone, diameter 3-6)
mm) and the weight ratio is 1: 14.3 (resin content is 6.
5%) mixed at 20 ° C., wooden formwork (thickness 10 m
m × width 70 mm × length 150 mm). This was left to stand in an atmosphere of 60 ° C. for 2 hours and then cured at 20 ° C. for 7 days to obtain an existing pavement material.

[0024]

[Table 1]

As the impregnating resin for repair, epoxy resin B (base / hardening agent = 100/40) having the viscosity characteristics shown in Table 2 was used. Further, a thixotropic agent was added thereto to obtain resins C and D having the viscosity characteristics shown in the table, which were also used as impregnating resins.

[0026]

[Table 2]

Next, the existing pavement material was impregnated with impregnating resins B, C and D, respectively, and an experiment was conducted. Details are as follows.

Example 1 An impregnating resin C was applied to an existing pavement material. Application is carried out in an atmosphere of 20 ° C with a roller brush, and 60 ° C immediately after application.
After being left for 2 hours in the atmosphere, the product was cured for 7 days. The coating amount has two levels of 0.5 kg / m ² and 1 kg / m ² ,
It was applied once and twice, respectively.

Example 2 Impregnation resin D was applied to an existing pavement material. The coating conditions were the same as in Example 1.

Comparative Example 1 An existing pavement material in which no resin was impregnated was designated as Comparative Example 1.

Comparative Example 2 Impregnation resin B was applied to an existing pavement material. The coating conditions were the same as in Example 1.

Test Example 1 Measurement of Resin Content About 2 g of a piece was taken from the upper and lower layers (thickness of about 3 mm each) of the existing pavement material, and the weight when burned at 600 ° C. for 4 hours The amount of resin was measured from the change. The measurement results are shown in Table 3. Further, in visual confirmation of the entire cross-sectional layer of the existing pavement material, in Comparative Examples 1 and 2, a large amount of resin was cured in the lower layer portion of the pavement material, whereas in Examples 1 and 2, the resin was in the upper layer portion. It was confirmed that the resin had a tendency to harden.

Test Example 2 Bending Strength Test With a tensile stress acting on the coated surface, the spacing is 100 m.
The breaking load was measured by the central halving load (loading speed 2 mm / min) as m, and the bending strength was calculated from the average value of the two bodies.
The results were as shown in Table 3.

Test Example 3 Water Permeability Test A pipe having a diameter of 50 mm and a height of 100 mm was placed on the impregnated surface, and the time taken for 1 liter of water poured into the pipe to pass through the pavement material was measured. The measurement results are shown in Table 3.

[0035]

[Table 3]

As is clear from the test results, Comparative Example 1,
Compared with No. 2, in Examples 1 and 2 impregnated with the thixotropic impregnating resin, the amount of resin in the upper layer portion of the pavement material could be increased, and the tendency of the resin to flow down to the lower layer could be improved. The amount of resin in the upper layer increased as the thixotropic index increased.

Further, as the amount of resin in the surface layer (upper layer) was increased, the bonding force between the aggregates was increased and the bending strength was also increased. This flexural strength increased as the thixotropic index of the impregnated resin increased, the total impregnation amount increased, and the number of times applied increased. This is consistent with the tendency that the resin tends to remain on the impregnated surface of the pavement material.

The maximum water permeation time was 40 seconds in Example 2, but the water permeation was within the practical range under all coating conditions. When the slipperiness of each impregnated surface was judged by touch, it was confirmed that the surface tended to be slippery as the thixotropic index of the impregnated resin increased and the number of times of coating increased. This tendency was remarkable especially in the wet state.

Example 3 With respect to 100 parts by weight of impregnated resin C, 5 and 10 parts by weight of natural pumice (Ishikawa Wright (trade name), particle size 0.13 to 0.
25 mm) was mixed, and under the same conditions as in Example 1 above, 1 kg / m ^{2 was} applied as a single coating to the existing pavement material.

Example 4 5 and 10 parts by weight of a baked balloon (Galolite (trade name), particle size of 0.05 to 0.
3 mm) was mixed, and under the same conditions as in Example 1 above, the existing pavement material was applied once at a rate of 1 kg / m ² .

Test Example 4 Friction Resistance Test As shown in FIG. 1, expanded polyethylene (5-fold expansion, 2 mm thickness, 1 cm × 1 cm) was formed on the top surface of the test body and at three locations on the bottom surface.
A weight (2.18 kg, diameter 65 mm, height 75 mm) to which was adhered was placed, and this was pulled with glass fiber, and the frictional resistance when moving for a certain distance was sprayed with water evenly on the surface of the test body when dry. The measurement was performed separately for the wet condition. The measurement results are shown in Table 4.

As Comparative Example 3, Test Example 4 was applied to an existing pavement material in which only impregnating resin C was applied once at 1 kg / m ^2.
Was tested. The results are shown in Table 4.

[0043]

[Table 4]

As is clear from the test results, when only the impregnated resin C was applied in Comparative Example 3, the amount of resin in the surface layer of the paving material was large, so that the friction coefficient was small and the surface became slippery. When impregnated resin C was mixed with fine-grained aggregate in Examples 3 and 4 and used, the coefficient of friction could be remarkably increased in both dry and wet conditions, and slipperiness could be improved. Moreover, when each impregnated surface was evaluated by touching, good feeling was obtained with both of the materials coated with the fine aggregate.

Example 5 The impregnated resin of Example 3 was subjected to test construction (air temperature 23 ° C., fine weather) in an actual construction object. As a result, good workability and impregnation state were obtained.

Example 6 The impregnated resin of Example 3 was added with 0.
1, 0.5 and 5.0 parts by weight of pigment are added respectively,
Trial construction at actual construction property (air temperature 23 ° C, sunny weather)
did. As a result, the pigment added 0.1 parts by weight,
The color of the surface was the same as before the impregnation, but the impregnation with the resin made the existing pavement stains noticeable. On the other hand, in the case of adding 0.5 and 5.0 parts by weight, the dirt on the surface was buried and became inconspicuous, and the texture of the existing pavement material was not impaired, and a beautiful and beautiful pavement surface could be obtained. .

[0047]

As described above, according to the method of the present invention, since the resin having thixotropy is impregnated from the surface of the pavement material, the impregnated resin does not drip down, and the surface layer portion of the pavement material is sufficiently spilled. It can be cured, and the bond strength between the aggregates of the surface layer can be effectively increased. Therefore, high strength can be imparted to the surface of the pavement material even with a single application, repair work can be efficiently performed, workability and workability can be improved, and repair cost can be reduced.

Also, by using a mixture of the above-mentioned impregnating resin with fine-grained aggregates or short fibers, the frictional resistance on the surface of the paving material can be effectively increased by one application, and in this respect as well. The workability of repair work can be improved and the cost can be reduced.

By adding a pigment to the above-mentioned impregnated resin, stains on the surface aggregate become less noticeable, and the pavement surface is naturally and beautifully repaired by taking advantage of the texture and texture of the existing pavement material. You can

[Brief description of drawings]

FIG. 1A is a diagram showing a measurement system of a friction resistance test,
(B) is a bottom view of the weight used in the friction resistance test.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Aihara 1-6-6 Minamidai, Kawagoe City, Saitama Prefecture Stock Company ABC Trading Company (72) Masaji Morikawa 1-6-6 Minamidai, Kawagoe City, Saitama Prefecture Stock Company ABC Company

Claims (5)

[Claims] 1. A method for repairing a water-permeable pavement material, which comprises impregnating a water-permeable pavement material laid on the lower ground with a resin having thixotropic properties. 2. In an atmosphere of 10 to 60 ° C., 2.0 to
The method for repairing a water-permeable pavement material according to claim 1, wherein a resin having a thixotropic index of 6.0 is used. 3. A resin having a thixotropic property and 2 to 20 fine aggregates having an average particle diameter of about 1 mm or less with respect to 100 parts by weight of the resin.
The method for repairing a water-permeable pavement material according to claim 1, which is used by mixing by weight. 4. The method for repairing a water-permeable pavement material according to claim 1, wherein a short fiber is mixed with a thixotropic resin. 5. The water-permeable pavement according to claim 1, wherein the resin having thixotropy is used by adding 0.5 to 5.0 parts by weight of a pigment to 100 parts by weight of the resin. How to repair wood.