JPS6033905A - Surface finish of concrete or asphalt concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a surface finishing method using a concrete or asphalt concrete layer as a base layer.

Outdoor play courts, especially tennis courts, change in appearance from earthen courts such as lawn courts, clay courts, and Antuca courts to concrete courts such as concrete or asphalt concrete courts, and even concrete courts such as Ac-1 Nor finish coats and even urethane finish coats. It became so.

This is because conventional soil-based courts have had disadvantages such as being very complicated to maintain, easily becoming muddy during rain and cannot be used immediately, and easily becoming dusty when dry. This is thought to be due to the rapid increase in the number of tennis enthusiasts, prompting the spread of concrete courts that do not have these drawbacks. Since such concrete courts do not have the above-mentioned disadvantages, they have been well received by managers and players, but the following new problems have also been pointed out. In other words, especially in the summer when the radiant heat from the sun's heat is strong, the temperature of the coat becomes abnormally high, and the surface does not absorb water, which is not expected. In addition, since the court is made of rigid concrete, playing on this court is more tiring than playing on the lawn court or Anzuca cordon, and it often causes problems in the legs and lower back. Furthermore, when cracks occur on the coated surface, it is extremely difficult to repair them; in particular, coats with a urethane finish tend to peel off the surface over long periods of use, making repairs expensive. ...and so on.

In addition, in recent years, it has become extremely difficult to secure effective space on the ground for exercise in urban areas due to overcrowding and soaring land prices. As is well known, it has come to be used as a space.

Conventionally, in order to make the roof of a building movable, mortar or insulating concrete is placed on various types of waterproofing layer covered on a base layer of concrete or asphalt concrete. Finishing can be done by applying acrylic, etc. or laying clinker tiles, or by forming a thick layer of urethane directly on the waterproof layer, but as a high-quality finish, the waterproof layer can be covered with an organic heat insulating material and mortar poured on top of it. Methods such as installing and finishing with various film-retaining materials were adopted. Rooftops finished using this method can be used for various sports such as volleyball and tennis, and the significance of such rooftop spaces in urban areas is extremely large. It was true that the game had some problems, such as not being able to play immediately and the construction cost being high.

The present invention has been made in view of the above problems, and it solves the above problems by forming a porous resin concrete layer made of granular aggregates mutually bonded with resin on a base layer of concrete or asphalt concrete. one]
It is an attempt to save one's life.

An actual example of the present invention will be explained with reference to the accompanying drawings. Figure m1 is a partially cutaway vertical cross-sectional view showing one part of the play court obtained by the method of the present invention, Figure 2 is a plan view of the same, Figures 3 and 3 are FIG. 4 is a partially cutaway vertical sectional view of another practical example. That is, in the present invention, the granular aggregate 21... and the binder resin liquid are mixed to such an extent that the aggregates 21... can be mutually bonded, and the aggregate 21... and the binder resin liquid are mixed. By laying the kneaded material directly or indirectly on the base layer 1 made of concrete or asphalt concrete and curing the binding resin liquid, the granular aggregates 21 are bonded to each other. This is a surface finishing method for a play coat, characterized in that a porous resin concrete layer 2 is formed. Figure 1 shows an example of a tennis court on the ground.The upper surface of the base layer 1 of concrete or asphalt concrete has a width of about 1Q, meandering vertically and horizontally.
cm water passage groove +1 is recessed and the side periphery is &i U
A drain groove 13 in the shape of a letter is provided. Furthermore, this water groove 1
A water supply pipe 12 connected to a water tap I4 installed in a corner of the court and having a plurality of small holes 121 drilled downward at approximately equal intervals is disposed within the water supply pipe 1. The water discharged from the drain groove 12 flows through the water passage groove 11 and is drained into the drainage groove 13 at the end thereof. Here, the groove bottoms of the water passage groove 11 and the drainage e13 should have an appropriate water gradient toward the drainage side, and the water passage ell
The concave pattern is not limited to the example shown in the figure; for example, in the case of a tennis court, the concave pattern may be provided in a high density in the back zone where players are frequently active.

In forming the porous resin concrete layer 2 on the base layer I, first, gravel or crushed stone 111 having a particle size of 1 nm or more and a binding resin liquid to be described later are mixed at a weight ratio of about 30:1.
The mixture is then kneaded and filled into the water passage groove 11 to make the surface uniform with the upper surface of the base layer l. The mixed substance filled in this water passage groove 11 forms a porous filling layer 110 in which gravel or crushed stones are mutually bonded together as the binding resin liquid hardens. The condition is to prevent the resin concrete layer 2 from sinking, for example, by installing a metal net (not shown) such as expanded metal over the opening of the water channel 11. This will improve the water permeability of the water passage groove 11 and prevent the above-mentioned depression, so it is not necessary to provide this filling layer 110 in particular. On the base layer l prepared in this way, particles with a particle size of 2 to 25
ff crushed stone 211... and a binding resin liquid to be described later are kneaded at a weight ratio of 15 to 50:1 to a thickness of 5 to 100 ffi! 1
Then, on top of that, rounded gravel with a particle size of 2 to 5 mm (hereinafter referred to as gravel) 212... and the same binding resin liquid as above are kneaded at a weight ratio of 15 to 30:l. Lay it so that it is 3 to 20 feet thick. In this way crushed stone 211
. . . and jade gravel 212 . . . as granular aggregates 21 .
and a surface layer 200, both of which constitute the porous resin concrete layer 2. Granular aggregate 21 in each layer
As a binder for mutually bonding..., etc., urethane,
Examples include synthetic resin binders such as epoxy, polyester, and acrylic (preferably methyl methacrylate).
In particular, one-component moisture-curing urethane is most preferably employed because it has excellent weather resistance, water resistance, etc., and is easy to handle. Epoxy-based and polyester-based binders can also be used, but the former has the disadvantage that it is difficult to set the temperature conditions for curing, and the latter is not recommended because it has poor adhesion with the base layer l. In this case, it is desirable to apply a suitable primer on the base layer 1, and these can be appropriately selected depending on the conditions. In addition, if the finished surface is to be colored, a dye or pigment may be added in advance to the resin liquid for forming the surface layer 200, or a desired paint may be applied on the surface layer 200 after being cured. Particularly in the case of a tennis court, color-coding the inside of the court and the surrounding area of the court using the above method is effective in making the court colorful and fashionable. On the other hand, the granular aggregate 21 . It can be made larger and has a good appearance or safety (in the case of crushed stone, players get scratched when they fall)
This is preferable in terms of the wearability of the balls, and from this point of view, gravel collected from rapid rivers, near river mouths, or on the coast is extremely suitable. Granular aggregate 2 for forming the surface layer 200
The crosstalk ratio between 1... and the binding resin is the respective aggregate 21...
- should be determined to such an extent that they can be coated with a binding resin and bonded to each other. For example, when the above-mentioned gravel with an average particle diameter of 5 millimeters is bonded with a one-component moisture-curing urethane, 100 parts of gravel (by weight) ), one-component moisture-curing urethane 2~
1° (solid weight) is suitable, which makes it about 25 to 85
A porosity of 1 is obtained. That is, if the amount of the urethane is less than 2 parts, it is difficult to sufficiently cover the surface of the gravel and bond with each other, whereas if it exceeds the LO part, the voids between the gravel will be filled with an excess of binding resin. As a result, the porosity of the porous surface layer 200 is reduced accordingly, and the intended effects of the present invention tend to diminish. Therefore, it is easy to understand that in order to achieve effective mutual bonding of aggregates 21 with a small amount of binding resin, it is preferable to use aggregates 21 or the above-mentioned rounded gravel. It will be. In addition, it is ideal that the crushed stones 211, 111, etc. used in the intermediate layer 20 and the filling layer 110 are bonded with resin at the above-mentioned crosstalk ratio as gravel, but since these layers can be covered with the surface layer 200, it is difficult to arrange the appearance. Since it is not necessary for the surface to be completely covered with a bonding resin, it is possible to use crushed stone or gravel, which is inexpensive and easily available, even if the surface area is large. These are appropriately selected according to the overall price and construction conditions.

Since the thus obtained play court has a porous resin concrete layer 2 formed on the upper surface of the concrete or asphalt concrete base layer 1, the water sprinkled on the court is quickly dispersed without accumulating on the surface. The water passes through the gaps in the resin concrete layer 2, reaches the base layer 1, moves over the base layer 1 in the surface area direction, collects in the water channel 11, and then flows through the meandering water channel 11. However, it is discharged to the outside of the court from the drainage ditch 13. Therefore, even after rain and water sprinkling, water does not accumulate on the surface, and it does not become muddy, so you can play immediately. Moreover, the water that permeates and flows through the water channel 11 is kept on the resin concrete. Water evaporates through the gaps in layer 2, so if you sprinkle water on the top surface before playing, the latent heat of evaporation will suppress the temperature rise due to solar radiant heat on the surface of the court, making it comfortable and cool even in the summer. You can enjoy playing. Furthermore, if the cooling effect is insufficient with water spray alone, the above-mentioned comfortable conditions can be maintained by constantly allowing water to flow through the water channel 11 using the water faucet 14 and the water supply pipe 12. In particular, since the water supply pipe 12 is provided with small holes +21 at appropriate intervals, the water supplied from the water faucet 14 is sprayed almost evenly over the entire water channel 11, so that the water is sprayed onto the court. The cooling effect becomes more effective. also,
Since the resin concrete layer 2 has porous elasticity, the impact force on the body during strenuous exercise on the court is alleviated. The negative effects of susceptibility to this are also significantly reduced. In addition, the surface is made of granular aggregate 2
1... Because it is a finely uneven surface, it exhibits a soft glow without the glare caused by the reflection of sunlight, and this uneven surface also guarantees non-slip properties suitable for sports such as tennis. By using aggregate 21 and gravel 212 as described above, it is also excellent in terms of safety, such as fewer scratches even if the player falls on the court. In addition, as is clear from the above structure, once installed, there is no need for any troublesome maintenance work, and even if the resin on the surface peels off during long-term use, the resin liquid can be sprayed or sprayed. Since the base layer 1 is made of rigid concrete, no caving or cracking will occur, and even if stress is applied to the resin concrete layer 2P due to shrinkage in the direction of the surface area, it can be easily repaired. Since it is absorbed by the voids in the concrete layer 2, cracks caused by such stress are prevented, ensuring semi-permanent use, and the construction cost is extremely low as the existing tennis court can be used as is. It also has the added advantage of being cheaper.

In the above embodiment, the water passage groove 11 is recessed in the base layer 1, but the water passage groove 11 is not provided and the porous resin layer 1 is disposed over a smooth concrete base layer l. Forming a concrete layer 2 is also not excluded. Even in this case, the water-permeable function of the resin concrete layer 2 keeps the top surface of the court in a playable state at all times, and if a gentle water gradient is provided on the base 1 and a drainage hole is provided on the side, watering or watering can be carried out. Rainwater flows slowly over the base layer 1 through the voids in the concrete layer 2, and the cooling effect on the upper surface of the court is achieved in the same manner as described above due to the evaporation action during this time. In addition, water supply pipe 1 arranged in water passage ll
2 is effective in distributing water throughout the entire area of the water passage groove 1-1.
It is possible to fill the channel with the filling layer 110 and allow water to flow directly from the water faucet 14 into the water channel 11. In this case, although the filling layer 110 somewhat obstructs the flow of water, the basic effect is still the same. It goes without saying that is the same as above. Furthermore, although the explanation above uses a tennis court as an example, it goes without saying that it can also be applied as a volleyball court or other outdoor sports court, or as a schoolyard for a kindergarten, elementary school, middle school, high school, or university. Then, the granular aggregate 21 of the surface layer 200 is made of natural gravel 21 as described above.
2... is the most desirable because it can be obtained in small quantities and at a low cost (more expensive than crushed stone), but it is also possible to use glass beads, resin beads, etc.

Figures 8 and 4 show an example in which the method of the present invention is applied to the roof of a building, and Figure 3 shows a conventional method using asphalt, rubber sheet, rubber asphalt, etc. on the base layer 1 of concrete or asphalt concrete. This shows that a known waterproof layer 3 is covered and a resin concrete layer 2 is formed thereon in the same manner as described above. In addition, in FIG. 4, a heat insulating layer 4 is covered on the waterproof layer 8 with an organic foam such as styrene foam, urethane foam, polyethylene foam, etc., and a resin concrete IJ-) layer 2 similar to the above is further placed on top of the heat insulating layer 4. Indicates that it has been formed. Since a roof surface finished in this way has a porous resin concrete layer 2 on its top surface, the water retention function of the resin concrete layer 2 makes it possible to maintain the above-mentioned structure even after rain or watering. Similarly, the pressure part becomes ready for play. Moreover, since the water in the resin concrete layer 2 evaporates through the voids, the rise in temperature on the surface is suppressed even in summer, resulting in a cool atmosphere. Furthermore, the above-mentioned waterproof layer 8 and heat insulating layer 4 are usually easily attacked by organic solvents, so it was conventionally considered impossible to finish them by directly coating them with synthetic resin, but resin concrete The mixture of granular aggregate 2 and resin liquid forming layer 2 is rich in granular aggregate 21, and the mixture itself is porous, so the organic solvent contained at the same time as the layer 2 is laid. The resin concrete layer 2 is formed which is firmly integrated with the waterproof layer 3 or the heat insulating layer 4 due to the adhesive properties unique to the binding resin without volatilizing through the voids and attacking the waterproof layer 8 or the heat insulating layer 4. As mentioned above, the resin concrete layer 2 can be formed easily using inexpensive materials, so it also has the added benefit of significantly reducing construction costs compared to conventional surface finishing methods for movable rooftops. be done.

Examples are given below to clearly demonstrate the above effects.

(Example 1) Ca) Base layer adjustment: Width IQn, depth 7cm, length 2 on the top surface of the existing asphalt concrete tennis court.
The two water passage grooves 01n were arranged in a serpentine VC recess so as to be symmetrical with the net in between. A U-shaped groove is provided on the periphery of the court side, the end of the water groove is connected to the U-shaped groove, a water faucet is installed at the starting point of the water groove, and the water faucet is connected to the water faucet. A 1-inch-diameter vinyl chloride pipe with small holes of 2H in diameter drilled downward at intervals of 2 m was placed in the water channel.

(b) The following three types of granular aggregate were prepared.

(b-1) Crushed stone with a particle size of 10 to 15 fl (b-2) Crushed stone with a particle size of 5 to 10111 (b-8) Gravel shoulder gravel with a particle size of 2 to 5 collected near the river mouth (C) Binding resin liquid Preparation of knee liquid moisture-curing urethane [Sumitomo Bayer Urethane Co., Ltd., SUMIDUR, E
21-1) with thinner (manufactured by Seka Kagaku Sangyo, 5w-100)
) to obtain a resin liquid with a solid content of 91 cm (weight).

(d) Add the above granular aggregate (b-1) and binding resin liquid to 10%
The mixture was kneaded at a ratio of 0 parts (by weight) to 3 parts (by weight), and the inside of the water passage groove was filled.

(e) Add the above granular aggregate (b-2) and the binding resin liquid to 10%
The mixture was kneaded at a ratio of 0 parts (by weight) to 4 parts (by weight), and was laid over the entire surface of the base layer to a thickness of 20 mm.

(f) 2 colored with chromium oxide and iron oxide colorants;
Prepare the above-mentioned binding resin liquid of seeds, and prepare the above-mentioned granular aggregate (b-8).
and the binder resin liquid in a ratio of 100 parts (by weight) to 5 parts (by weight), and these two types of mixed materials were colored on areas divided into the inside and outside of the coat to give a thickness of lOm. The O(g) thus laid was pressed with a trowel moistened with the thinner to smooth the surface, and left to dry for 4 hours to dry and harden to form a porous resin concrete layer.

(h) Tennis court lines were drawn on the upper surface of the resin concrete layer with white paint using a V trowel.

When water was sprinkled on the tennis court obtained in the above example, the water quickly penetrated into the layer without accumulating on the surface, and the surface became ready for play immediately. In addition, when water was allowed to flow from the water faucet above on a sunny day in midsummer, the temperature on the upper surface of the court did not rise above 82°C and an extremely comfortable condition was maintained. Incidentally, in a conventional asphalt concrete coat, the surface temperature can reach as high as 70°C. Next, an example of a rooftop surface finishing method is shown in Example 2. Examples 8 and 4 will be explained below.

(Example 2) (a) Selection of floor to be surface-finished The roof of a concrete building that had been subjected to exposed waterproofing using Niassfald waterproofing was selected.

(b) Preparation of granular aggregate: particle size 2-3 collected from the coast
I prepared 1IM gravel.

(C) Mixture of binding resin liquid and granular aggregate! : Unsaturated polyester [manufactured by Inu Nippon Ink Co., Ltd., Polylite 810]
No. 0 (contains accelerator and curing agent)] and the above gravel were thoroughly kneaded at a weight ratio of 1:20.

(d) Place the above blended material on the asphalt waterproof layer.
The concrete was laid to a certain thickness, and the surface was smoothed and allowed to dry and harden to form a porous resin concrete layer.

The formed resin concrete layer was firmly integrated with the waterproof layer without attacking it.

(Example 8) (a) Selection of floor to be surfaced: The roof of a concrete building, which had been exposed and waterproofed using rubber sheet waterproofing, was selected.

(b) Same as (b) of Example 2 (C) Kneading of the bonded resin liquid and granular aggregate: The moisture-curable urethane resin liquid used in Example 1 and the above gravel were mixed at a weight ratio of 1.
Mixed well with 20%.

(d) The above mixed conductor was laid on the rubber sheet waterproof layer to a thickness of 5 mm, the surface was smoothed, and the mixture was dried and hardened to form a porous resin concrete layer.

The waterproof layer was firmly integrated with the resin concrete layer without any blisters.

(Example 4) (a) Selection of floor to be surface-finished The roof of a concrete building that had been waterproofed using Niasfald waterproofing was selected.

(b) Formation of a heat insulating layer 2 A styrene foam with a thickness of 30 nm was covered over the entire surface of the waterproof layer with an adhesive to form a heat insulating layer.

(C) Preparation of granular aggregate: Gravel with a grain size of 5 collected from the coast was prepared.

(d) Mixing of the binder resin liquid and granular aggregate: The moisture-curing urethane resin liquid used in Example 1 and the gravel were thoroughly kneaded at a weight ratio of 1:20.

(e) The above mixed wire was laid on the heat insulating layer to a thickness of 1 (if), the surface was smoothed, and the mixture was dried and hardened to form a porous resin concrete layer.

The heat insulating layer was firmly integrated with the resin concrete layer without being attacked by the resin liquid.

The finished surfaces in Examples 2 to 4 above are all porous resin concrete layers, so even when water is sprinkled on the top surface, water does not accumulate on the top surface, allowing immediate movement, and even under sunny skies in summer. However, the temperature did not rise abnormally like in the conventional case. These are extremely suitable for the rooftops of buildings and various schools in urban areas, and greatly contribute to securing space for exercise.

As described above, if the surface finishing method of the present invention is applied to an existing concrete or asphalt concrete court, it will be possible to create an ideal court that has all the advantages of the conventional Anzuca coat or asphalt concrete court, making it ideal for players. It is sure to be well received by managers and managers, and even existing courts can be quickly converted to this ideal court with simple renovation work without requiring major construction, making it extremely realistic. It is a dog that stands out for its practicality and practicality. In addition, if the method of the present invention is applied to the roof of a building or school building, it will be extremely practical as an effective exercise space, and it can be constructed easily and inexpensively, making it a rare item for building managers and school personnel. It is no exaggeration to say that this is good news.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway longitudinal sectional view showing an example of a play court obtained by the method of the present invention, FIG. 2 is a plan view of the same, and FIGS. 3 and 4 are partially cutaway longitudinal sectional views of other embodiments. be. (Explanation of symbols) 1... Base layer, 11... Water channel, 12... Water supply pipe, 121... Small hole, 2... Porous resin concrete layer, 21... Granular bone Material, 3... Waterproof layer, 4...
insulation layer. that's all

Claims (1)

[Claims] 1. Granular aggregate (21...) and the aggregate (21...)
Knead with a binding resin liquid to the extent that the comrades can bond with each other,
By directly or indirectly laying a mixture of aggregate (21...) and binding resin liquid on the base layer (1) made of concrete or asphalt concrete, and curing the binding resin liquid. , the granular aggregate (2
1...) A surface finishing method for a concrete or asphalt concrete layer, characterized in that a porous resin concrete layer (2) is formed by mutual bonding of comrades. 2. The surface finishing method according to claim 1, wherein water passage grooves (11) are formed vertically and horizontally in the divided area of the base layer (11). (121) The surface finishing method according to claim 1 or 2, in which a freezing pipe 02 is provided. ↓ The base layer 11) must be covered with a waterproof layer (3). 5. The surface finishing method according to claim 1, wherein the resin concrete layer (2) is formed on the waterproof layer (3). A surface finishing method according to claim 1 or 2, characterized in that a concrete layer (2) is formed.