JPH0219242B2 - - Google Patents

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, are changing from earthen courts such as lawn courts, clay courts, and untuker courts to concrete courts such as concrete or asphalt concrete courts, acrylic finishing coats, and even urethane finishing courts. Summer. This is because conventional soil-based courts had drawbacks such as being very complicated to maintain, easily becoming muddy during rain and not being able to 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, which encouraged the spread of concrete courts, which do not have these drawbacks. Since such concrete courts do not have the above-mentioned problems, they have been well received by managers and players, but new problems have also been pointed out as follows. In other words, especially in the summer when the sun's heat reflects back (radiant heat), the temperature of the court becomes abnormally high.Moreover, the surface does not absorb water, so even if water is sprinkled, water will accumulate, making it impossible to play, and the court will return to its original state after evaporation. Since the water will return to normal immediately, we can hardly expect any cooling effect from sprinkling water. Moreover, since the rigid concrete quality is the substance of the court,
Playing on this court was more tiring than playing on the lawn court or Antuker court, and often caused problems with the legs and lower back. Furthermore, when cracks occur on the coated surface, it is extremely difficult to repair them, and 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. It is well known that it has come to be used as a space.
Traditionally, in order to make the rooftop of a building movable,
Mortar or heat insulating concrete is placed on various waterproof layers covered on a base layer of concrete or asphalt concrete, or this is finished by coating with urethane, acrylic, etc., or by laying clinker tiles, or a waterproof layer is Methods such as forming a thick layer of urethane directly on top of the waterproof layer, or even covering the waterproof layer with an organic heat insulating material for a high-quality finish, placing mortar on top of it and finishing with various protective materials are used. Ta. Various sports such as volleyball and tennis can be played freely on rooftops finished in this way, and such rooftop spaces are of great significance in urban areas. It is true that there were problems such as the inability to play immediately and the high construction costs.

The present invention has been made in view of the above, and solves the above problems by forming a porous resin concrete layer, which is made by resin-bonding granular aggregates with each other, on a base layer of concrete or asphalt concrete. The aim is to wipe out all the points.

Embodiments of the present invention will be described based on the accompanying drawings.
FIG. 1 is a partially cutaway longitudinal section 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 sections of other embodiments. It is a diagram. That is, the present invention provides granular aggregate 21...
and a binding resin liquid to the extent that the aggregates 21... can be mutually bonded, and the kneaded product of the aggregates 21... and the binding resin liquid is placed on the base layer 1 made of concrete or asphalt concrete. By directly or indirectly laying the concrete and curing the binding resin liquid, a water-permeable porous resin concrete layer 2 is formed by mutual bonding of the granular aggregates 21. This is a unique surface finishing method for play courts. Figure 1 takes an above-ground tennis court as an example, and the top surface of a concrete or asphalt concrete base layer 1 is recessed with water passage grooves 11 about 10 cm wide that meander in a series of vertical and horizontal directions, and the side periphery thereof. A U-shaped drain groove 13 is provided. Further, in this water passage 11, a water supply pipe 12 is arranged, in which a plurality of small holes 121 are bored downward at approximately equal intervals and connected to a water tap 14 installed in a corner of the court. The water discharged from the water supply pipe 12 flows through the water passage groove 11 and is drained into the drainage groove 13 at its end. Here, the groove bottoms of the water passage groove 11 and the drainage groove 13 should have an appropriate water slope toward the drainage side, and the concave pattern of the water passage groove 11 is not limited to the illustrated example. In the case of a tennis court, it is also possible to provide these in a high density in the back zone where players are frequently active.

To form the porous resin concrete layer 2 on the base layer 1, first, gravel or crushed stone 111 with a particle size of 1 mm or more and a binding resin liquid to be described later are mixed at a weight ratio of about 30:1. Then, the water passage groove 11 is filled with this kneaded material to make the surface uniform with the upper surface of the base layer 1. The kneaded material filled in this water passage groove 11 forms a porous packed layer 110 in which gravel or crushed stones are mutually bonded together as the binder resin liquid hardens. The condition is that the resin concrete layer 2 is formed to prevent the resin concrete layer 2 from sinking, and for example, a metal net (not shown) such as expanded metal is installed over the opening of the water channel 11. Since the water permeability of the water passage groove 11 and the prevention of the above-mentioned depression are achieved, it is not necessary to provide this filling layer 110 in particular. On the base layer 1 prepared in this manner, crushed stone 211 with a particle size of 2 to 25 mm and a binding resin liquid to be described later are placed at a weight ratio of 15 to 50.
Knead in a ratio of 1 to 1 and lay it out to a thickness of 5 to 100 mm.
Further, 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 30:1 to a thickness of 3 to 20 mm.
Lay it so that it is mm. In this way, crushed stone 211...
Each layer is made of granular aggregates 21 and jade aggregates 212, and as the binding resin liquid hardens, a porous intermediate layer 20 is formed in which the granular aggregates 21 are bonded to each other.
and a surface layer 200, both of which constitute the porous resin concrete layer 2. Examples of the binder for mutually binding the granular aggregates 21, etc. of each layer include synthetic resin binders such as urethane, epoxy, polyester, and acrylic (preferably methyl methacrylate). One-component moisture-curing urethane is most preferably used because it is superior and easy to handle. Epoxy-based and polyester-based binders can also be used, but the former has the disadvantage that it is somewhat difficult to set the temperature conditions for curing, and the latter has poor adhesion with the base layer 1, so it is difficult to use. It is desirable to apply an appropriate primer on the base layer 1,
These can be selected as appropriate depending on the conditions. In addition, if you want to color the finished surface, use surface layer 2.
A dye or pigment may be added in advance to the resin liquid for forming 00, or a desired paint may be applied on the surface layer 200 after hardening. 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 increasing the colorfulness and fashionability. On the other hand, since the gravel 212 serving as the granular aggregate 21 constituting the surface layer 200 has a relatively uniform shape and particle size, the amount of binding resin liquid used can be small, and the porosity can be increased. It is preferable in terms of quality, good appearance, safety (in the case of crushed stone, players get scratched when they fall), and the wearability of the ball, and from this point of view, gravel collected from rapid rivers, near river mouths, or on the coast is extremely suitable. It is. The kneading ratio of the granular aggregates 21 and the binding resin for forming the surface layer 200 should be determined to such an extent that each of the aggregates 21 can be covered with the binding resin and bonded to each other, for example, the average When the above gravel with a particle size of 5 mm is bonded with one-component moisture-curing urethane, 100 parts of gravel (by weight)
In contrast, a one-component moisture-curing urethane of 2 to 10 (solid weight) is suitable, which provides a porosity of about 25 to 35%. That is, if the amount of urethane is less than 2 parts, it is difficult to sufficiently cover the surface of the gravel and bond to each other, whereas if it exceeds 10 parts, the voids between the gravel will be filled with excess binding resin. Therefore, the porosity of the porous surface layer 200 is reduced accordingly, and the intended effects of the present invention tend to be reduced. Therefore, it is easily understood that in order to achieve effective mutual bonding of the aggregates 21 with a small amount of binding resin, it is preferable that the aggregates 21 be rounded, such as the above-mentioned gravel. Note that the intermediate layer 20 and the filling layer 11
Ideally, crushed stones 211, 111, etc. used for Because it does not require coating with a binding resin, it is possible to use the above-mentioned crushed stone or gravel, which has a large surface area and is inexpensive and easily available.
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, water sprinkled on the court is quickly transferred to the resin without collecting on the surface. The water passes through the voids in the concrete layer 2 and reaches the base layer 1, and is collected in the water channel 11 while moving over the base layer 1 in the surface area direction.
Furthermore, the water drain 1 flows through the meandering water passage 11.
3, it is discharged outside the court. Therefore, even after rainfall or watering, water does not accumulate on the surface and it does not become muddy, so you can play immediately. Since water evaporates through the voids in the resin concrete layer 2, if you sprinkle water on the top surface before playing, the latent heat of evaporation will suppress the temperature rise due to solar radiation on the court surface as much as possible, creating a comfortable and cool feeling 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. Especially water supply pipe 12
Since small holes 121 are drilled at appropriate intervals, the water supplied from the tap 14 is sprayed almost evenly over the entire water channel 11, making the cooling effect on the court even more effective. become a target. In addition, the resin concrete layer 2 has a unique elasticity due to the synergistic effect of the elasticity of the resin that interconnects the granular aggregates 21 and the voids formed, which reduces the impact force on the body during intense exercise on the court. As a result, the negative effects of conventional asphalt concrete courts, such as being easily tiring and easily causing leg and lower back problems, are significantly reduced. In addition, since the surface is a finely uneven surface made of granular aggregate 21, 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. Granular aggregate 21 of the surface layer 200...
If the above-mentioned gravel 212 is adopted, 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, there will be no caving or cracking, and even if stress is applied to the resin concrete layer 2 due to shrinkage in 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 existing tennis court can be used as is, reducing construction costs. It also has the added advantage of being extremely cheap.

In addition, in the above embodiment, an example was shown in which water passage grooves 11 were recessed in the base layer 1, but the above porous resin concrete was directly placed on the smooth concrete base layer 1 without providing the water passage grooves 11. It is not excluded that a layer 2 may also be formed. Even in this case, the water permeability function of the resin concrete layer 2 keeps the top surface of the court always in a playable condition, and if a gentle water gradient is created in the base layer 1 and a drainage port is provided on the side, water can be sprinkled. Alternatively, water due to rain 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 effect during this time. In addition, water channel 11
The water supply pipe 12 disposed inside is effective in distributing water throughout the water passage groove 11;
The water passage groove 11 is connected to the filling layer 1 without arranging the filling layer 2.
10, and directly connect the water passage groove 11 from the water tap 14.
It is possible to allow the water to flow through the tube, and in this case, although the flow of water is somewhat inhibited by the packed bed 110, it goes without saying that the basic effect 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. The granular aggregate 21 of the surface layer 200
As described above, natural gravel 212 is most desirable because it can be obtained in large quantities and at low cost (more expensive than crushed stone), but it is also possible to use glass beads, resin beads, etc.

Figures 3 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, FIG. 4 shows that a heat insulating layer 4 is covered on the waterproof layer 3 by an organic foam such as styrene foam, urethane foam, polyethylene foam, etc., and a resin concrete layer 2 similar to the above is further placed on top of the heat insulating layer 4.
This indicates that a In the case of a rooftop whose surface has been finished in this way, there is a porous resin concrete layer 2 on the top surface, so the water retention function of the resin concrete layer 2 allows the above-mentioned operation to be carried out even after rain or watering. As in the example, it becomes ready to play immediately. Moreover, this resin concrete layer 2
Since the water inside evaporates through the pores, the temperature rise on the surface is suppressed even in the summer, creating a cool atmosphere. Furthermore, the above-mentioned waterproof layer 3 and heat insulating layer 4 are usually easily attacked by organic solvents, and it was conventionally considered impossible to finish them by directly coating them with synthetic resin. The kneaded product of the granular aggregate 21... and the resin liquid that forms the concrete layer 2 is rich in the granular aggregate 21... and the kneaded product itself is porous. A resin concrete layer 2 is formed that is firmly integrated with the waterproof layer 3 or the heat insulating layer 4 due to the unique adhesiveness of the binding resin without volatilizing through the resin and attacking the waterproof layer 3 or the heat insulating layer 4.
In addition, since the resin concrete layer 2 is formed easily using inexpensive materials as described above, it also has the added benefit of significantly reducing construction costs compared to conventional surface finishing methods for movable rooftops. Ru.

Examples are given below to further clarify the above effects.

Example 1 (a) Adjustment of base layer: 10 cm wide and 7 cm deep on the top of the existing asphalt concrete tennis court.
Two 20m long water channels were installed in a symmetrical meandering pattern 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 2 mm 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 mm (b-2) Crushed stone with a particle size of 5 to 10 mm (b-3) Particle size of 2 to 5 collected near the river mouth
mm gravel (c) Preparation of binding resin liquid: One-component moisture-curing urethane [Otomo Bayer Urethane Co., Ltd.,
SUMIDUR, E21-1] was diluted with thinner (manufactured by Kanka Kagaku Sangyo, SW-100) to give a solid content of 91%.
(weight) of resin liquid.

(d) Combine the above granular aggregate (b-1) and binding resin liquid.
Knead at a ratio of 100 parts (by weight) to 3 parts (by weight),
The inside of the water passage groove was filled.

(e) Combine the above granular aggregate (b-2) and binding resin liquid.
Kneaded in a ratio of 100 parts (by weight) to 4 parts (by weight),
It was laid to a thickness of 20 mm over the entire surface of the base layer.

(f) Prepare two kinds of the above binding resin liquids colored with colorants of chromium oxide and iron oxide, and mix 100 parts (by weight) of the above granular aggregate (b-3) and the binding resin liquid to 5 parts, respectively. parts (weight), and these two types of kneaded products were laid on areas divided into the inside and outside of the court to have a thickness of 10 mm in different colors.

(g) The above-described kneaded material was pressed with a trowel moistened with the above-mentioned thinner to smooth the surface, and left to stand naturally for 4 hours to dry and harden to form a porous resin concrete layer.

(h) The prescribed tennis court lines were drawn on the top surface of the resin concrete layer using white paint.

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 run from the tap above on a sunny day in the middle of summer, the temperature on the top of the court did not rise above 32°C, and extremely comfortable conditions were maintained. By the way, the surface temperature of conventional asphalt concrete can reach up to 70℃.

Next, an example of a rooftop surface finishing method will be explained using Examples 2, 3, and 4.

Example 2 (a) Selection of floor to be surfaced: The roof of a concrete building, which was exposed to waterproofing using asphalt waterproofing, was selected.

(b) Preparation of granular aggregate: Particle size 2 ~ collected on the coast
I prepared 3mm gravel.

(c) Kneading the binder resin liquid and granular aggregate: Thoroughly knead the unsaturated polyester (manufactured by Dainippon Ink Co., Ltd., Polylite No. 8100...contains accelerator and curing agent) and the above gravel at a weight ratio of 1:20. did.

(d) Spread the above kneaded material on the asphalt waterproof layer for 10 minutes.
The concrete was laid to a thickness of mm, smoothed the surface, and dried and hardened to form a porous resin concrete layer.

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

Example 3 (a) Selection of floor to be surfaced: The rooftop of a concrete building, which had been exposed to waterproofing using rubber sheet waterproofing, was selected.

(b) Same as (b) of Example 2 (c) Kneading of the binder resin liquid and granular aggregate: The moisture-curable urethane resin liquid used in Example 1 and the above gravel may be mixed at a weight ratio of 1:20. Kneaded.

(d) Spread the above kneaded material onto the rubber sheet waterproof layer by 5 mm.
The concrete was laid to a thickness of 1,000 yen, the surface was smoothed, and the concrete 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 surfaced: The roof of a concrete building waterproofed using asphalt waterproofing was selected.

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

(c) Preparation of granular aggregate: 5 mm particle size collected from the coast.
I prepared some gravel.

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

(e) The above-mentioned kneaded material was laid on the above-mentioned heat insulating layer to a thickness of 10 mm, and the surface was smoothed and 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, the present invention provides the following effects. That is, a water-permeable porous resin concrete layer 2 is formed on a base layer 1 of concrete or asphalt concrete, in which granular aggregates 21 are bonded to each other by a bonding resin, and this layer is applied to various play courts, etc. if you did this,
There is no dust, there is no puddles or mud after rain, and play is possible immediately. By sprinkling and retaining water on the resin concrete layer 2, players can enjoy playing games that feel cool even in the summer due to the latent heat of evaporation. Since the resin concrete layer 2 has unique elasticity due to the interaction between the binding resin and the voids formed, it causes fewer problems for the feet and lower back than a conventional concrete or asphalt concrete coat. Furthermore, it is also applicable to the rooftops of buildings and school buildings, thereby making it possible to secure new and useful space for exercise and the like. Furthermore, since the resin concrete layer 2 is formed on the rigid base layer 1, it will not cave in or crack even under intense movement, and once installed, it requires almost no maintenance and is semi-permanent. We promise to use it properly. Furthermore, since the resin concrete layer 2 has a unique appearance and can be colored, various color coordinations can be selected depending on the intended use or matching with the surrounding environment. Since the method of the present invention can be easily applied to existing concrete courts, rooftops, etc., it is extremely practical and has great practical value.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway longitudinal section 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 sections of other embodiments. It is a diagram. (Explanation of symbols), 1... Base layer, 11... Water channel, 12... Water supply pipe, 121... Small hole, 2... Porous resin concrete layer, 21... Granular aggregate,
3... Waterproof layer, 4... Heat insulation layer.

Claims (1)

[Claims] 1. Knead granular aggregates 21 and a binding resin liquid to such an extent that the aggregates 21 can bond with each other, and create a kneaded product of the aggregates 21 and the binding resin liquid. By laying directly or indirectly on the base layer 1 made of concrete or asphalt concrete and curing the binding resin liquid, a water-permeable porous structure is formed by mutual bonding of the granular aggregates 21. A method for finishing the surface of a concrete or asphalt concrete layer, characterized in that a resin concrete layer 2 is formed. 2. The surface finishing method as set forth in claim 1, wherein water passage grooves 11 are provided vertically and horizontally in the partitioned area of the base layer 1. 3. Claim 2, in which a water supply pipe 12 with a plurality of small holes 121 is provided in the water passage groove 11.
Surface finishing method described in section. 4. The surface finishing method according to claim 1, wherein the base layer 1 is covered with a waterproof layer 3, and the resin concrete layer 2 is formed thereon. 5. The surface finishing method according to claim 1 or 2, wherein the waterproof layer 3 is further covered with a heat insulating layer 4, and the resin concrete layer 2 is formed thereon.