JPS60175659A - Construction of coated floor - 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 method of constructing a coated floor.

Conventionally, when forming the floor surfaces of building structures such as rooftops, corridors, balconies, and passageways, as well as the court surfaces of all-weather tennis courts, etc., using coating materials such as polyurethane, cast-in-place concrete and lightweight foaming have been used. It is formed by painting a coating material such as two-component type or moisture-curing type urethane on a base surface made of concrete board or asphalt such as Remiphalt, but according to this conventional construction method, the following occurs. There are drawbacks such as (a) to (force).

(In other words, depending on the weather conditions when applying the coating material to the base surface and the drying conditions after concrete is placed, the base may contain moisture. After a coating material is applied, the moisture vaporizes and expands due to solar heat, causing partial separation between the coating material and the substrate due to vapor pressure, resulting in so-called "blistering".
blister) may occur.

(blAlso, coating materials generally contain organic solvents or
Many of these are liquid types that generate reactive gases, and after painting (after construction), vaporized organic solvent gases and reactive gases expand due to solar heat, causing "blistering" for the same reason as mentioned in the previous section.
occurs.

(C1 Also, if the coating material is to be applied as thick as 2 to 10 meters, it will need to be applied in two or more times, which will take a long time, and if the installation is done outdoors, there is a risk of rain etc. after painting. Not only do you have to make sure that the eyebrows do not get wet, but also because you apply two or more coats, you end up trapping air between your eyebrows, which expands due to heat from the sun, etc.
“Bulge” occurs.

(dl Furthermore, many coating materials generally have self-leveling properties, and the thickness of the coating may be uneven due to the precision and ridges of the unevenness of the underlying surface. Therefore, the finishing accuracy of the underlying surface may be required.

If a crack appears in the tel base surface, the crack will expand and contract repeatedly due to solar heat, and zero span tension will be applied locally, which may cause the coating material to break.

fflIn particular, when constructing gymnasium floors or all-weather tennis courts, rubber chips are mixed with polyurethane on the underlying surface made of mortar or concrete, painted and cured on site, and then a glass coat or base coat is applied on top of that. A construction method in which a top coat is painted, sprayed, and cured is used, but this method requires a large number of on-site construction work and takes a long time, 10 to 15 days, to complete.

In the case of item (f) before TGI, rubber chips are mixed with polyurethane and painted on-site, so the coating thickness and void conditions tend to be uneven, and sports floors require properties such as shock absorption and bounce. -, extremely specialized painting techniques were required.

The present invention was invented in view of the above problems,
The purpose is to provide a method for constructing a coated floor in which the coating material does not peel off from the underlying surface and does not cause "blister".

The configuration of the present invention will be explained below.

That is, the gist of the present invention is to construct a coated floor, which is characterized in that a pre-formed porous structure is layered on a base surface, and then a coating material is applied over this layer. The method is.

Next, an embodiment of the present invention will be explained based on the attached drawings in comparison with a conventional construction method.

FIG. 1 is a sectional view showing the cross-sectional structure of a coated floor obtained by a conventional method for constructing a coated floor.

In the drawing, reference numeral 1 indicates a base surface such as a concrete pouring surface, and 2 indicates a coating material directly applied to the base surface. In such a construction structure, a is the state of evaporation of water contained in the base, and b is the state of the air drawn in when coating the coating material 2 on the base surface 1. C is a swollen portion, which is a phenomenon caused by expansion pressure caused by the expansion or vaporization expansion of the water a or air due to solar heat or the like.

On the other hand, FIG. 2 shows a cross-sectional structure of a coated floor according to the method of constructing a coated floor of the present invention, and FIG. 3 is a partially enlarged sectional view of FIG. 2.

Here, numeral 3 is a porous structure, which is made of, for example, chloroprene rubber (CR), styrene-butadiene rubber (SDR), isobutylene-isoprene rubber (IIR), ethylene-propylene-diene terpolymer (EPDM), etc. ), vulcanized rubber such as natural rubber, synthetic resins such as polyurethane and vinyl chloride, cork, waste tires, waste conveyor helds, etc.
A breathable sheet material made by hardening chip or pellet particles with a size of about 0 mm using a binder such as polyurethane to the extent that there are voids between the particles, or continuous foam made of the above-mentioned synthetic rubber or natural rubber. Use a sponge with In addition, 1 indicates a base such as a concrete pouring surface, 2 indicates a coating material, 4 indicates particles of chips or pellets constituting the porous structure, and 5 indicates each particle 4.
It shows the voids formed between each other. Furthermore, a゛ is the base 1
b indicates the movement of the water contained in the film, b is the movement of air that is drawn in when painting the coating material, and d is the movement of the solvent gas.

Here, to explain the construction method of the coated floor of the present invention, a porous structure 3 which has been pre-molded is layered (meaning bonding or laying) on one surface of the base, and the porous structure Either the coating material 2 is coated on top of the porous structure 3, or the coating material 2 is pre-coated on the surface of the porous structure 3, manufactured in a factory, etc., and the integrated product is transported to the construction site and layered. However, a method may also be used in which the porous structure is placed only in the few joints and the coating material is applied thereon.

Furthermore, FIG. 4 is a sectional view according to another embodiment of the present invention, in which a degassing tower 6 is disposed between the coating material 2 and the porous structure 3.

Next, the construction method of the coated floor according to the present invention,
An outdoor exposure experiment using conventional construction methods will be explained.

10 parts by weight of a polyurethane binder was added to 100 parts by weight of waste tire chip powder with an experimental particle size of 511, mixed uniformly with a mixer, placed in a mold, pressed and heated to form voids, and thickened. A breathable cloak (porous structure) of size 511II is manufactured. Next, this breathable cloak was pasted with adhesive onto a slate board with dimensions of 9 m thick, 1 m wide, and 2 m long, and a two-component heating type polyurethane coating material was applied over it. Mix the base resin and curing agent in a 5:1 mixing ratio evenly, and apply the coating to a thickness of about 2fi on the surface of the breathable mat, and let it dry naturally. The next day, a sample was further coated with the same coating material as above to a thickness of about 2 mm and exposed outdoors.

On the other hand, as a comparison, a two-component type polyurethane coating material consisting of the same main agent as above with 10% by weight of toluene added and a curing agent was applied on a slate board with the same dimensions as above in a ratio of 5:1. After uniformly mixing at a mixing ratio, painting to a coating thickness of 211, and drying naturally, the next day, a comparative sample was prepared in which a coating material was further applied to a thickness of about 2 cm and exposed outdoors in the same manner.

The results of the exposure experiment are as follows.

After 1 day of exposure - the conventional one (comparison sample) was already 3
A ``bulge'' of approximately 5 cm ρ occurred, but with the method of the present invention, there was no change at all and the ``bulge'' was not observed).

3 days after exposure - conventional product (comparison sample) has "swelling"
The area has become even larger, with ``bulges'' measuring about 10 cm scattered around.

There is no change at all in the product of the present invention.

After 130 days of exposure, the "swelling" of the conventional product (comparison sample) became larger and larger.

There is no change in the present invention.

As is clear from the above experimental results, according to the present invention,
It has been found that the "blister" that occurs on the underside of the coating material can be completely prevented.

Considering that, with the construction method of the present invention, the moisture contained in the base, the solvent contained in the coating material, and the air mixed in between the base and the coating material are removed by the breathable mantle ( It is thought that the so-called "bulging" phenomenon does not occur as a result of the diffusion and movement into the pores of the porous structure and the dispersion of the expansion pressure.

The construction method of the present invention is configured as described above, and has the following effects.

(1) That is, according to the construction method of the present invention, the porous structure having the structure described above is first layered on the base surface, and then the coating material is applied. The moisture contained in the coating material, the air drawn in when applying the coating material, the solvent contained in the coating material, and the gas of the solvent used to improve workability are widely dispersed in the voids of the porous structure. The gas moves by diffusion and does not concentrate in one place and expand as in the past, so even if the gas is warmed by the influence of solar heat and expands, the expansion pressure will decrease per unit area as the gas diffuses. The expansion pressure of the gas becomes extremely low, and as in the past, there is no ``bulge'' caused by the expansion of the gas body due to the influence of solar heat.
will never occur.

(2) Furthermore, according to the construction method of the present invention, the porous structure is layered on the base surface, and the coating material is applied from above. Since the membrane material is not painted, the finishing accuracy of the base surface does not have to be as careful as with conventional construction methods, and even if there are some irregularities on the base surface, the coating film can be directly applied. Since it does not affect the material, the coating material layer can be made uniform without being affected by the finish quality of the base.

(3) With conventional construction methods, the structure itself expands and contracts due to solar heat, and if cracks appear in the underlying surface, zero spansion occurs, which has a local negative effect on the coating material.However, the construction method of the present invention has been adopted. By doing so, since there is a porous structure between the lower pond surface and the coating material, even if the underlying surface cracks, it will not directly affect the coating material, so there will be no local adverse effects. do not have.

(4) Furthermore, according to the construction method of the present invention, the cross-sectional structure of the resulting coated floor has a porous structure interposed between the coating material and the base, and the presence of this porous structure Due to this, appropriate adhesion and stiffness are exhibited, resulting in a good walking feeling.

(5) In addition, in on-site construction using conventional construction methods, rubber chips are mixed with polyurethane to create a porous structure on top of the underlying surface, and spray painting is performed on-site to maintain the voids. In the case where the coating material is applied from above, there was no way to check the state of the voids, etc. However, according to the method of the present invention, the porous structure is pre-formed, and its thickness can be checked. Since the porosity existing in the porous material can be adjusted in advance, it is possible to adjust the state of the pores and construct the confirmed material. You can also combine structures as you like.

(6) In particular, when the construction method of the present invention is used as a sports floor such as a tennis court, the presence ratio of voids in the porous structure, the type and particle size of the chip material constituting the porous structure, and the By appropriately adjusting the thickness of the material structure, it is possible to obtain any desired cushioning properties.

(7) According to the construction method of the present invention, construction is possible even if some moisture remains on the subsurface, the construction period is significantly shortened, and stable quality can be achieved without being affected by weather etc. It is possible to make things.

(8) In addition, with conventional construction methods, it was said that a ventilation layer with a thickness of less than about 10 mm could not be painted on-site, but according to the present invention, it is possible to paint a ventilation layer with a thickness of about 1 mm or less. Yes, construction costs and total costs are low.

(9) Furthermore, when a degassing tower is installed between the substrate and the coating material using the construction method of the present invention, moisture remaining in the substrate and air caught on the back side of the coating material may cause "blister". The substance vaporizes due to solar heat and releases the gas to the outside over time, so the present invention is more effective in suppressing the occurrence of "blister" in the coating material by dispersing it into the voids of the porous structure. It will further improve.

As described above, according to the coating floor construction method according to the present invention,
This product can very easily and efficiently suppress the "blister" phenomenon on floor surfaces and sports floors, and can also be used to prevent "blister" in asphalt thermal construction methods, deaeration for civil engineering applications such as reservoirs and waterways, and more. It can also be used as a drainage material for water flow.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing a construction structure according to a conventional coating film floor construction method, and FIG. 2 is a sectional view showing a cross-sectional structure of a coating film floor according to the coating film floor construction method of the present invention. 3 is a partially enlarged sectional view of FIG. 2, and FIG. 4 is a sectional view according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Base, 2... Coating film material, 3... Porous structure, 4... Chip or pellet particles, 5... Voids, 6... Deaeration tower, a...・Situation of moisture evaporation, b...
・Air condition, a′... Moisture movement situation, b゛...
Air movement situation, C...Bulging part, d...Movement situation of solvent gas Patent applicant's agent name, - +-〆/My;

Claims (1)

[Claims] A method for constructing a coated floor, characterized by layering a pre-formed porous structure on a base surface, and then applying a coating material over the layer.