JPH0522744U - Base plate for construction - Google Patents

Abstract

(57) [Abstract] [Purpose] [Structure] A waterproof coating layer 2 is formed on the surface of a substrate 1, and an undercoat layer 3 composed of an inorganic binder, an organic binder 4 and an aggregate 6 is formed on the waterproof coating layer 2. A base plate for construction in which a small void 5 exists in the base layer 3. [Effect] Since a large water absorption capacity can be obtained even when the layer thickness is thin, a large amount of mortar can be applied regardless of the lightweight base plate. Furthermore, since voids gather around the aggregate and play the role of an air cushion, elasticity and strength can be imparted to the layer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 An architectural base plate that can be sprayed directly onto a mortar coating wall or tile wall of a building.

[0002]

[Prior art and its problems]

 Conventionally, a waterproof layer made of rubber or the like is provided on a plate-shaped substrate such as plywood, and a layer with irregularities of about 1 mm, which is mainly composed of cement and organic aggregate, is formed to improve adhesion with mortar. Although a mortar base plate is already known, this cement layer having a thickness of about 1 mm has a low absolute water absorption capacity of the layer, and it is difficult to thickly coat the mortar, and it is difficult to deposit a large amount of mortar.

Therefore, it is attempted to improve the water absorption by adhering a large amount of mortar by increasing the thickness of the cement layer to which the mortar of the base plate is applied, and to reduce the weight of the thick cement layer and improve its quality. In order to obtain cuttability, it is proposed that synthetic resin foam particles are mixed in the layer. (JP-A-55-30049)

[0004] However, this proposal uses mixing of synthetic resin foam particles in the underlayer as a means for solving the conventional problem, and a kneading layer of organic foam and mortar cement is provided on the upper surface of the underlayer. Has been formed. Therefore, this proposal has the following problems.

(1) In the manufacturing process, due to the elasticity of the organic foam, the thickness of the composite layer itself is restored after the compression process and before curing, and the accuracy of the thickness of the entire base material is lacking. It is difficult to create a clear uneven pattern.

(2) Due to expansion and deformation of the organic foam due to moisture or heat from the outside, the overall dimensional accuracy of the base material is disturbed.

[0007]

[Technical means]

 The present invention has created the following constitution in order to solve the problem that the dimensional accuracy of the conventional construction base plate is low. That is, the building base plate of the present invention comprises a waterproof coating layer 2 formed on the surface of a substrate 1, and an underlying layer comprising an inorganic binder and / or an organic binder 4 and an aggregate 6 on the waterproof coating layer 2. 3 is formed, and small voids 5 are present in the underlayer 3.

The base material of the present invention has a large water absorption capacity even with a thin layer due to the above-mentioned constitution, so that a large amount of mortar can be applied regardless of the weight of the base plate. ..

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a building base plate according to the present invention. A waterproof coating layer 2 is formed on the surface of the substrate 1. As the substrate 1, an inorganic plate such as plywood, fiber board, wood shaving board, cement board, gypsum board, wood wool cement board, wood piece cement board, calcium silicate board, pulp cement board, or an organic board or an inorganic organic board. A plate-shaped body made of a mixed plate or a composite plate is used.

Next, the waterproof resin layer 2 is formed by uniformly applying and drying a synthetic resin, a latex, a bituminous substance or an emulsion thereof on the surface of the substrate 1 with a coating device such as a roll coater or a flow coater.

The synthetic resin of the waterproof coating layer 2 is vinyl acetate resin, vinyl chloride resin, acrylic resin, epoxy resin, etc., and the latex is acrylonitrile butadiene rubber (NBR), butadiene acrylic rubber (MBR), styrene butadiene rubber. (SBR) and the like, and tar and asphalt are used as the bituminous substance.

If necessary, an additive such as clay, talc, calcium carbonate, or an auxiliary agent such as a dispersant may be added to and mixed with the waterproof coating layer 2. If the substrate surface is a porous plate-like body, the waterproof coating layer 2 is used as a smooth surface to prevent moisture from permeating from the surface (improving water-proof performance) and to prevent the substrate itself from absorbing moisture due to moisture permeation and expansion. It functions to prevent warpage and decay.

The waterproof coating layer 2 prevents elution of water or an alkali-soluble component (drilling) depending on the material of the substrate 1, and the mixture layer 3 and the lightweight cement layer 4 applied on the waterproof coating layer 2 are hardened by curing. It also serves to eliminate the occurrence of delays or blockages.

Further, by making the surface smooth by the waterproof coating layer 2, when the surface is porous, voids (air pockets) in the surface recesses are eliminated to prevent the generation of air bubbles, and the mixture applied onto the surface is prevented. The effect of substantially increasing the adhesion area between the underlying layer 3 and the substrate 1 is obtained.

Next, a base layer 3 made of an inorganic binder and / or an organic binder 4 and an aggregate and further including a small void 5 is formed on the waterproof coating layer 2. As the inorganic binder, various types such as ordinary cement, early-strength cement, ultra-early-strength cement, moderate heat cement, aluminum cement, blast furnace cement, fly ash cement, silica cement, and rapid hardening cement are used. Examples of the organic binder include vinyl acetate resin, vinyl chloride resin, acrylic resin, and epoxy resin as synthetic resins, and acrylic nitrile butadiene rubber (NBR), butadiene acrylo rubber (MBR), and sterene as latex. Butadiene rubber (SBR) and the like are used as the bituminous material such as tar and asphalt. By using the same material as that used for the waterproof coating layer 2 for the underlayer 3 as described above, the organic binder of the cellular aggregate layer 3 and the synthetic resin or latex forming the waterproof coating layer 2 are used. , The adhesion is strengthened by the intermolecular attractive force with the bituminous substance. The small voids 5 are formed in the layer by using a foaming agent, an AE agent, a foaming agent or the like. Examples of the foaming agent include terpene alcohols, cresylic acid, and aliphatic alcohols having 5 to 8 carbon atoms. As the AE agent, a resin salt type, an alkyl sulfonate triethanolamine type, an alkyl benzene sulfonate type, a lignin sulfonate type and the like, as well as a cationic surfactant and an anionic surfactant are used. As the foaming agent, metal powder such as aluminum and zinc and carbide powder can be fried. In this way, independent or continuous cells formed by connecting them are formed.

As the aggregate 6, calcium carbonate, talc, clay, fly ash, incineration ash, slag, vermiculite, perlite, expansive rock, expansive clay, silas balloon or polyethylene, synthetic resin beads such as polystyrene, synthetic resin Foamed granules, crushed granules of synthetic resin foam, wood powder, wood fiber, etc. can be used regardless of whether they are organic, inorganic, foamable or non-foamable, and these can be used alone or in admixture as appropriate. Can be used.

In the base layer 3 thus obtained, the small voids 5 and the aggregate 6 are mixed. Mixing of the aggregate 6, particularly mixing of the foaming aggregate, has an air entraining action by itself during the kneading of the bubbles and the aggregate layer 3 and promotes the action of various foaming agents, AE agents and foaming agents. , Induce more voids to occur.

Further, when the voids are formed by the action of various foaming agents, AE agents, and foaming agents, a large amount of water is required, but a large amount of water is added to obtain sufficient bubbles. Therefore, the slurry has excessive fluidity, resulting in deterioration of shapeability and workability.

However, the excess water is absorbed by mixing the aggregate, particularly the aggregate having water absorbability. That is, the base layer 3 can be formed by a slurry having a large amount of bubbles and having an appropriate workability.

The underlayer 3 containing a large amount of air bubbles in this way serves not only to reduce the weight of the underlayer, but also has a sufficient water absorption capacity for the moisture contained in the mortar applied to the surface of the underlayer. Therefore, the mortar can be firmly applied to the surface. At this time, if porous aggregate is used as the aggregate, the water absorption capacity can be further improved. Therefore, the underlayer can have a sufficient holding force for the finished mortar even if the layer thickness is thin. Further, since the underlayer is composed of a foam and voids, even if the underlayer itself is thickly coated, the weight can be reduced as compared with conventional products. Therefore, the underlayer of the present invention can be appropriately selected in any thickness from thin to thick depending on the situation. Above all, when the thickness of the underlayer is used in the range of 7 mm to 15 mm, the coating thickness of the finishing mortar can be made thin, and one-time mortar coating can save labor that has never been seen in the field. It is very preferable in that it is possible to obtain a flame spread prevention structure or a fire protection structure at the same time as it is achieved. If the thickness of the underlayer is less than 7 mm, the amount of finish mortar applied in the field is large. If the thickness is more than 15 mm, the finishing mortar may be thinly coated, but it is difficult to work by one person in terms of weight. However, the holding power itself against the finished mortar does not deteriorate, and there is no problem in terms of the function as a base material. Further, in the underlayer 3 thus formed, the small voids 5 exist so as to be attached so as to surround the periphery of the aggregate 6. This state is shown in FIGS. That is, the aggregate 6 is provided with the air cushions 7 with various small voids 5 around it, and even when non-foamed aggregate is used as the aggregate, the foamable aggregate is present in the underlayer 3. Not only can elasticity be imparted in the same manner as described above, but at the same time, greater mechanical strength can be obtained than when foaming aggregate is used alone. In addition, since the aggregate used to form the surface irregularities is pressed into the air cushion 7 provided in each aggregate during the compression process, a clear and precise thickness dimension is maintained regardless of the restorability of the aggregate. It is possible to add an uneven pattern.

As described above, since the void 5 exists in the same layer as the aggregate 6 and the void 5 exists as the air cushion 7 surrounding the aggregate 6, an extremely wide variety of bones that do not limit the aggregate used The material can be used without any harm, and an excellent base plate for construction can be obtained.

Even when the aggregate 6 expands and deforms due to factors such as heat and ultraviolet rays, the air cushion 7 around the aggregate absorbs the deformation as a substitute for the deformation of the aggregate. It does not impair the overall dimensional accuracy of the base plate.

The foundation layer of the obtained construction foundation plate is forcibly dried immediately after formation, and the water contained in the foundation layer is rapidly scattered and removed. At this time, the hardening reaction of the cement in the base layer was interrupted for a while and is not completely completed. In this state, the water impermeable coating 8 is releasably laminated on the mixture layer, that is, the underlayer 3. (Fig. 1)

By doing so, the underlayer 3 is protected from the humidity of the surrounding atmosphere and moisture such as rainwater and the suspended state of the curing reaction can be maintained. As a means for forming the water-impermeable coating 9 so that it can be peeled off, it is possible to use a re-peelable pressure-sensitive adhesive or to attach a water-impermeable film to the surface of the underlayer to form a water-impermeable coating. The water-impermeable coating may be applied to the surface of the formation layer to form a water-impermeable coating 8 by drying.

In the former case, the removable pressure-sensitive adhesive does not require a solvent, heat, etc., and is adhered to another surface with a very low pressure such as finger pressure. An adhesive that does not leave traces on the surface and can be easily peeled off. Specifically, rubber pressure sensitive adhesives, acrylic pressure sensitive adhesives, silicone pressure sensitive adhesives, polyvinyl ether pressure sensitive adhesives. Etc. can be illustrated. As the water impermeable film used at this time, polyethylene film, polypropylene film, polyvinyl chloride film and the like are fried.

The water-impermeable film adhered to the surface of the underlayer via this re-peelable pressure-sensitive adhesive is a mortar after the building base plate is carried to a construction site and nailed to a building frame. Immediately before coating, it is preferable to peel off the adhesive together with the adhesive from the surface of the underlayer.

In the latter, the stripping paint refers to a coating that can be easily stripped off in a continuous film after being dried by an appropriate method after coating and achieving the intended purpose. Various types such as solution type such as vinyl-vinyl acetate copolymer, sol type, water-dispersion type using emulsion of vinyl butyral resin, vinyl acetate resin, vinyl chloride resin, acrylic resin, etc. Can be used.

These stripping paints applied on the surface of the underlayer are dried by an appropriate means to form a water impermeable film on the surface of the underlayer. Then, this impermeable coating is applied to the surface of the underlayer until just before the building base plate is transported to the construction site, nailed to the building frame, and mortar applied. Immediately before the attachment, it is preferable to be peeled off from the surface of the underlayer.

Then, the building base plate on which the base layer which has not been hardened in this way is formed is carried to each building site, and the water-impermeable coating 8 is peeled off to contain a large amount of water as shown in FIG. Finishing mortar 9 is applied. Then, the water contained in the finishing mortar 9 is supplied to the underlayer 3 where the curing is suspended, and the curing reaction is restarted. For this reason, the base layer 3 made of the cement mixture and the cement of the mortar each form a polymerized product and a hydrated product in a state where they are in contact with each other, so that better adhesion can be obtained.

At the same time, this water-impermeable coating occurs when an organic foam is mixed in the underlayer of the board for a building foundation. It is possible to protect the organic foam from external factors that cause problems such as a) stability collapse due to moisture and heat from the outside, b) deterioration of durability due to deterioration by ultraviolet rays.

Further, since this water-impermeable coating is formed on the surface of the underlayer of the architectural underlayer, the surface of the underlayer is exposed to external physical factors at any time during curing, transportation and construction. It also has the effect of protecting against damage and loss due to damage. For this reason, the surface of the foundation layer of the foundation plate for construction can maintain the desired coated surface of mortar.

When the construction base plate is nailed from above the water-impermeable coating formed on the surface of the base layer, there is a gap generated at the contact portion between the nail and the base layer at the nail driving portion. It can be completely sealed, preventing moisture from penetrating from the nailed part as in the past, preventing nail corrosion, and increasing the durability of the building frame.

[0034]

[Effect of the device]

 Since the foundation layer 3 of the foundation plate for construction of the present invention has a large amount of voids and aggregates therein, it has the following effects.

(A) The underlayer has a sufficient holding power for the finishing mortar even if the layer thickness is thin.

(B) Since this underlayer is composed of lightweight aggregate and voids, it is possible to reduce the weight as compared with the conventional product, so that the underlayer can be thickly applied. For this reason, if such a thick coating of the underlayer is applied, the fire spread prevention structure or fire protection structure can be used in the field only by making the coating thickness of the finishing mortar as thin as one coating. It is possible to obtain labor savings that are not available at the same time.

(C) Since the voids gather around the aggregate and play the role of an air cushion, elasticity and strength can be imparted to the layer. That is, even the non-foaming aggregate can obtain the same elasticity as when the foaming aggregate is used alone. At this time, the strength of the non-foaming aggregate is not lost as it is.

(D) Since the aggregate is pressed into the air cushion by the compressive force applied to the base material, the accuracy of the thickness dimension was maintained regardless of the restoration property of the aggregate. You can make sharp irregularities. As a whole, deformation due to external factors is also absorbed by the air cushion, so the overall dimensional accuracy of the base plate is not impaired.

(E) Excellent in cutting workability.

[Brief description of drawings]

FIG. 1 is a sectional view of a base plate of the present invention,

FIG. 2 is an explanatory view showing a formation state of air 5.

FIG. 3 is an enlarged view of a main part of FIG.

FIG. 4 is a sectional view when mortar 9 is applied,

[Explanation of symbols]

 1 Substrate 2 Waterproof Coating Layer 3 Underlayer 4 Inorganic or Organic Binder 5 Small Void 6 Aggregate 7 Aertion 8 Water Impermeable Coating 9 Finish Mortar

Claims (2)

[Scope of utility model registration request] 1. A waterproof coating layer 2 is formed on the surface of a substrate 1, and a base layer 3 composed of an inorganic binder and / or an organic binder 4 and an aggregate 6 is laminated on the waterproof coating layer 2. However, there is a small void 5 in the base layer 3, which is a base plate for construction. 2. The base plate for construction according to claim 1, wherein a water-impermeable coating film 8 which can be easily peeled off is formed on the surface of the base layer 3.