JPH09111706A - Fixing method of beautiful aggregate on base body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always obtain an even surface regardless of the workability, by joining beautiful aggregate composed of particles with a specified diameter to a base body with a synthetic resin binder and filling dry sand into the clearances between the beautiful aggregate particles. SOLUTION: Beautiful aggregate 24 having 0.5-20 in the longer diameter are placed on a base body 21 to bind the beautiful aggregate 24 with a synthetic resin binder. And the clearances between respecive aggregate particles are filled with dry sand 25. Then, a solvent or aqueous synthetic resin adhesive is applied thereon and at least the upper part of the sand is bonded and cured. In this way, scatterings owing to operators are eliminated and an even surface is always obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing beautiful aggregate on a substrate such as concrete.

[0002] As shown in FIG. 1, the exterior of a building, such as a general promenade, a park, a garden, an entrance to a restaurant, a front entrance path, a plaza on a site of a building such as an art museum, a gymnasium, or a museum, is made of concrete or the like as shown in FIG. Gravel pavement in which beautiful aggregate and resin are mixed on the surface of a substrate has been used. In this specification,
The structure shown in FIG. 1 is simply called pea gravel pavement.

[0003]

2. Description of the Related Art A conventional pea gravel pavement was manufactured as follows.

(A) The major axis of the particles is 0.5 to
A beautiful aggregate of 20 mm was bound with a synthetic resin binder. (Fig. 2)

However, in this method, since the gap between the beautiful aggregates is 20 to 25% of the volume, the time-dependent change of about one year after the construction is severe. The gaps are clogged with earth and sand, and the surface of the beautiful aggregate is dirty.
It looked bad and was a problem. In order to prevent this, a method of pouring cement paste into the gaps between the beautiful aggregates (see Japanese Patent Publication No. 7-1178) has been advanced, but this method requires the skill of a worker to remove the paste. . In addition, it is somewhat difficult to determine that the paste in the process has initially set. This results in individual differences among workers. In addition, the amount of the cement paste to be washed out varies depending on the operator during washing. When the amount of washing out increases, a state in which a lot of beautiful aggregates appear is obtained. When the washing amount of the cement paste is small, the surface exposure amount of the beautiful aggregate is small. Therefore, the surface condition was different depending on the difference of the workers. This is not a problem at different sites, but at the same site, which must be finished in the same state, there is a problem that the surface condition varies from place to place.

[0006]

Means for Solving the Problems In fixing the beautiful aggregate on the substrate, the present inventors bind the beautiful aggregate with a synthetic resin binder, and then lower the beautiful aggregate layer with mortar paste. By burying dry sand, it was discovered that a fixed layer can be obtained with a beautiful aggregate having a uniform surface condition regardless of the work performed by any worker because it is a dry powder. .

According to the present invention, there is provided (a) a beautiful aggregate having a long particle diameter of 0.5 to 20 mm bonded to a substrate with a synthetic resin binder, and (b) a gap between the beautiful aggregates is dried sand. And (c) spraying a solvent-based or water-based synthetic resin adhesive thereon and bonding and hardening at least the upper part of the sand to fix the beautiful aggregate on the substrate including the respective steps. In the present invention, sand means silica sand and / or sand usually used for, for example, construction purposes. The present invention
Beautiful aggregate having a major axis of 0.5 to 20 mm bonded with a synthetic resin binder present on the base, dry sand powder present in the lower part of the gap between the beautiful aggregates, and beautiful bone on the upper part of the powder It also relates to a fine aggregate layer on a substrate in which silica sand cured with a synthetic resin adhesive is present so that the top of the aggregate is exposed. The present invention will be described with reference to the drawings. In FIG. 2, a beautiful aggregate 14 having a long diameter of 0.5 to 20 mm is placed on a base 11, and the beautiful aggregate 14 is joined with a synthetic resin joining material (not shown). Next, the gap between the aggregates 14 is filled with dry sand 25 (see FIG. 3). If necessary, use a vibrator to fill the gaps in the aggregate. Next, a solvent-based or water-based synthetic resin adhesive is sprayed thereon. The sand is hardened by spraying the synthetic resin adhesive solution (see FIG. 4). In this case, the dry sand existing in the gaps between the beautiful aggregates is evacuated by spraying the synthetic resin adhesive solution, and the surface is lowered when the adhesive is hardened. The sand is adhesively hardened while the beautiful aggregate protrudes from the surface. In the present invention, the sand as a whole is, of course, adhesively hardened, but only the upper portion is hardened, and the lower portion remains powdered. Silica sand is preferably No. 5 to No. 8 and sand is 3
It is preferably 0 mesh or less. Adjustment of filling height of dry sand
Plasterer or deck brushes are preferred. As a beautiful aggregate, a beautiful natural cobble stone or a crushed natural stone which is excellent in design is preferable. Artificially colored aggregates can also be used, but are less preferred in design. As described above, the size of the aggregate is preferably one having a major axis in the range of 0.5 to 20 mm. If it is smaller than this, the essential design value is rapidly reduced, and if it is larger than this range, it becomes difficult to apply the composition to the object to be coated. In particular, in application to a wall surface, the larger the aggregate becomes, the more easily the applied coating composition falls, and if it exceeds this range, the application is difficult, if not impossible. As the synthetic resin binder, any one that forms a transparent film that is curable at room temperature can be used. An epoxy resin composition comprising a bisphenol A or F type epoxy resin and a polyamine or polythiol, an unsaturated polyester resin, an unsaturated polyester resin composition comprising a vinyl monomer such as ethylene and a polymerization initiator,
A urethane resin composition comprising a urethane prepolymer synthesized from a polyisocyanate and a polyol or polyester and a polyamine or a polyol as a curing agent, or a urethane resin composition comprising an acrylic polyol and a polyisocyanate are all applicable. The viscosity of these synthetic resin binders is 500-100,0.
It is preferably within the range of 00 centipoise. Here, the floor is 500 to 7,000 centipoise, and the wall is 2
Preferably, it is in the range of 000 to 100,000 centipoise. If the viscosity is lower than this, it is difficult to keep the aggregate on the wall surface when applied to the wall surface, and the binder flows down to the underground surface when applied to the floor surface, and the adhesive strength is reduced. In addition, when the viscosity increases, the workability of both becomes poor, and it becomes impractical. The appropriate viscosity also depends on the size of the natural aggregate used. Generally speaking, larger aggregates require higher viscosity binders. Aggregate 1
The amount of the synthetic resin binder to be added is preferably 3 to 15 parts by weight based on the solid content based on 00 parts by weight. However, this requires a small floor surface and many wall surfaces. If the addition amount is less than this, the bonding strength of the aggregate is too weak, causing a problem in practical use, and the addition amount larger than this is not only economically inappropriate, but also increases the degree of discoloration due to natural exposure, so it is practical Not preferred. As the synthetic resin adhesive, an adhesive such as an epoxy resin, a urethane resin, an acrylic resin, a polyurea resin, or a polyester resin can be used. Particularly, a urethane resin adhesive is preferable. These resin adhesives are used after being dissolved or dispersed in water or an organic solvent. Water is preferred as the medium. The concentration of the resin is preferably 3 to 20%.

【Example】

EXAMPLE 1 60 parts by weight of a modified polyamine (Sunmide 1) as a curing agent was added to 100 parts by weight of a liquid epoxy resin of bisphenol A type (Epicoat 828, oiled shell).
M-544, Sanwa Chemical Co., Ltd.) and 16 parts by weight of butyl glycidyl ether as a reactive diluent were added and mixed uniformly to obtain a binder having a viscosity of about 1,000 centipoise. 14 parts by weight of major axis 1 with respect to 1 part by weight of the binder adjusted here
A natural cobblestone of 0 mm was added, and the binder was evenly applied to the surface of the aggregate to obtain a coating composition. The coating composition was applied to a thickness of about 10 mm on concrete outdoors using a gold trowel and left to cure for about 12 hours to form a porous aggregate layer.
Next, dry silica sand No. 7 was filled in the gap between the aggregates using a vibrator so that the upper portion of the aggregates was exposed by about 3 mm. Next, 800 g of 20% acrylic resin aqueous solution
/ M ² to bond and harden the silica sand. The beaded gravel pavement was filled with gaps while maintaining its beauty, thus reinforcing the strength.

According to the present invention, since dry silica sand and sand are filled, gaps in the aggregate can be easily filled up to a predetermined thickness, and variations due to workers can be eliminated. The beauty when not filling the gap with pavement and the beauty that does not change so much can be maintained.
Further, it is possible to provide a fine aggregate pea gravel pavement which can completely prevent the inflow of earth and sand and dust into the gap due to aging and can reduce the early rate of aggregate removal due to insufficient strength due to the gap.

[Brief description of the drawings]

FIG. 1 is a sectional view of a so-called pea gravel pavement.

FIG. 2 is a cross-sectional view showing a state in which beautiful aggregate of a conventional method is bonded with a synthetic resin binder.

FIG. 3 is a cross-sectional view of the state of FIG. 2 filled with quartz sand and sand.

FIG. 4 is a cross-sectional view of a state where the one in FIG. 3 is cured.

Claims (2)

[Claims] 1. The method according to claim 1, wherein (a) the major axis of the particles is 0.5
(B) fill the gaps between the beautiful aggregates with dry sand, and (c) spray a solvent-based or water-based synthetic resin adhesive on the A method of fixing a beautiful aggregate on a substrate including the steps of bonding and hardening sand in an upper portion. 2. A beautiful aggregate having a major axis of 0.5 to 20 mm bonded with a synthetic resin binder present on a substrate, a dry sand powder present in a lower part of a gap between the beautiful aggregates, A beautiful aggregate layer on a substrate in which sand hardened with a synthetic resin adhesive is present so that the upper part of the beautiful aggregate is exposed in the upper part.