JPH05285912A - Production of laminate of elastic surface layer material and concrete structure - Google Patents

Abstract

PURPOSE:To reduce production cost to a large extent and to increase bonding strength by applying an adhesive to the rear of an elastic surface layer material to pour concrete not hardened into the space above the elastic surface layer material and ageing the concrete not hardened not only to obtain a concrete structure but also to cure the adhesive. CONSTITUTION:Elastic surface layer materials 2 are closely laid on the bottom part of the inside space 1a of a form 1 so that the surfaces 2a of the elastic surface layer materials 2 are brought into contact with the wall surface 1b of the bottom part of the inside space 1a and the rears 2b thereof are turned upwardly to form a flat surface. Subsequently, a primer is pref. applied to the rears 2b and an adhesive 3A is uniformly applied to the primer coated rears. Concrete 4A not hardened is poured into the inside space 1a and aged according to a usual method. Whereupon, the concrete 4A not hardened is cured in this stage to become a concrete structure and the uncured adhesive 3A is cured at the same time to become an adhesive layer. This laminate is demolded and carried to the spot to be executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laying an elastic surface material on the surface of a concrete structure.

[0002]

2. Description of the Related Art A technique for laying an elastic surface layer material such as a rubber tile on the surface of a concrete structure to make up the concrete structure has been attracting attention. According to this, it is possible to construct a well-appearing floor surface, wall surface, ceiling surface, pavement or the like having various patterns at a relatively low cost.

Conventionally, there are the following methods for laying an elastic surface material on the surface of a concrete structure. (1) After pouring fresh concrete at the construction site and curing it, an adhesive is applied to the back surface of the elastic surface material, and the elastic surface material is laid and adhered. (2) Pouring ready-mixed concrete into the mold to form a concrete structure. Next, an adhesive is applied to the back surface of the elastic surface layer material to bond the elastic surface layer material to the surface of the concrete structure.

[0004]

In any of the above methods, first, the raw concrete is cured and hardened, and then the surface latance and dirt of the concrete structure are removed.
A primer and an adhesive are applied to the back surface of the elastic surface layer material. Then, it is necessary to lay the elastic surface layer material, fix the elastic surface layer material until the adhesive is cured, and leave it standing. However, both the hardening of the green concrete and the hardening of the adhesive take a considerable amount of time. Therefore, if such a series of construction work is carried out at the construction site, the construction cost will be high and the construction will be significantly delayed. Further, even when a mold is used, the work still requires a long time and the manufacturing cost is high. Furthermore, when pouring fresh concrete on site, unevenness occurs on the surface of the concrete structure after hardening, and a smooth surface cannot be obtained. Therefore, when the elastic surface layer material is bonded, it is necessary to absorb the unevenness of the concrete surface by adjusting the application amount of the adhesive and the like.

An object of the present invention is to improve the productivity of the laminate and to reduce the production cost when producing the laminate of the elastic surface layer material and the concrete structure.

[0006]

According to the present invention, an elastic surface material is molded, and the elastic surface material is laid on the inner wall surface of a mold so that the surface of the elastic surface material contacts the inner wall surface. Applying an adhesive, pouring fresh concrete into the mold before the applied adhesive hardens, and curing the fresh concrete to obtain a concrete structure, and at the same time hardening the adhesive to give a concrete structure The present invention relates to a method for manufacturing a laminate of an elastic surface layer material and a concrete structure, in which the elastic surface layer material and the elastic surface layer material are bonded together.

[0007]

EXAMPLES Examples of the present invention will be described below. First, in this example, the rectangular or square elastic surface layer material 2 in plan view was used. As shown in FIG. 4, the dimensions of the elastic surface layer material 2 are set so that the elastic surface layer material 2 can be laid on a plane without a gap.

As the material of the elastic surface layer material 2, rubber industry,
Any elastic body commonly used in the plastics industry can be used. For example, as the main polymer, PVC
, Styrene butadiene rubber, natural rubber, CSM, CPE,
Butyl rubber, RB, isoprene rubber, polyurethane and mixtures thereof can be used. Examples of the method for molding the elastic surface layer material 2 include die molding, calender molding, and the like, and vulcanization is performed if necessary. A molded product obtained by molding vulcanized rubber powder such as tire powder in a binder can also be used. Also,
Although the elastic surface layer material 2 itself is shown as a single structure in the drawings, it may be separated into a surface decorative layer and a back surface layer. In this case, the surface decorative layer may be provided with a spiral pattern, a striped pattern, a sea-island pattern, or the like.

As shown in FIG. 1, an elastic surface layer material 2 is laid without a gap at the bottom of an inner space 1a of a form 1 for pouring concrete. At this time, the surface 2a of each elastic surface layer material 2 is brought into contact with the bottom wall surface 1b. The back surface 2b of each elastic surface material 2 faces upward. In this state, the back surface 2b forms a flat surface. Next, the back surface 2b is preferably coated with a primer, and then the adhesive 3A is uniformly coated.

Then, as shown in FIG. 2, green concrete 4A is filled in the inner space 1a and cured according to a conventional method.
At this stage, as shown in FIG. 3, the green concrete 4A hardens to become the concrete structure 4B, and along with this, the uncured adhesive 3A hardens to become the adhesive layer 3B. This laminate is demolded, transported to the site, and constructed. The back surface 2b of each elastic surface material 2 is bonded to the concrete structure 4B, and the front surface 2a is exposed. Then, as shown in FIG. 4, the elastic surface layer material 2 is
Cover the surface of the concrete structure 4B.

As the adhesive 3A, a chloroprene rubber type,
Examples thereof include styrene-butadiene rubber-based and NBR-based synthetic rubber-based adhesives, vinyl acetate-based and acrylic-based thermoplastic resin adhesives, epoxy resin-based adhesives, urethane resin-based adhesives, and the like. Both the one-pack type and the two-pack type can be used, but the water-insoluble type is particularly preferable. As the raw concrete 4A, a mixture of water, cement, sand, gravel, etc. can be used. When a certain level of strength is required, reinforced concrete can be made by embedding reinforcing bars in fresh concrete.

As described above, the present inventor has made the elastic surface layer material 2
Even if the adhesive 3A is applied to the back surface 2b of the, and the concrete 3A is poured while the adhesive 3A is uncured,
It was found that the curing of the adhesive 3A proceeded sufficiently with the curing of the. As a result, compared with the conventional manufacturing method, the time required for manufacturing the laminated body is significantly shortened, the labor of the work is reduced, and the manufacturing cost is significantly reduced.

Moreover, it was surprisingly found that when the hardening of the adhesive 3A and the hardening of the ready-mixed concrete 4A were simultaneously progressed, the adhesive strength between the concrete structure 4B and the elastic surface material 2 was rather improved. The reason for this is not clear, but the adhesive
It is also considered that the reactive group of the molecule of 3A reacts with the component of ready-mixed concrete 4A and that the adhesive 3A has an anchoring effect.

Further, concrete experimental results will be described.
70 parts by weight of synthetic rubber, 30 parts by weight of natural rubber, 10 parts by weight of pigment,
Stearic acid 15 parts by weight, zinc oxide 5 parts by weight, filler 150
10 parts by weight, 10 parts by weight of naphthenic oil, 2 parts by weight of sulfur, and 3 parts by weight of vulcanization accelerator were processed by a conventional method to obtain a thickness of 10 mm,
A vulcanized rubber tile 2 having a length of 100 mm and a width of 100 mm was manufactured. The surface 2a of the vulcanized rubber tile 2 was provided with an uneven pattern. Next, the back surface 2b of each vulcanized rubber tile 2 was coated with a trichloroisocyanuric acid-based primer, and the vulcanized rubber tile 2 was laid inside the mold 1 as shown in FIG.

Next, the epoxy adhesive 3A "Konishi E-35"
After stirring 2 liquids of "0", it was applied to the back surface 2b at a rate of 400 g / m ^{2 with} a sieve mesh iron. Next, the pre-assembled rebar was installed in the formwork 1. On the other hand, 3 parts by weight of water, 5 parts by weight of cement, 14 parts by weight of fine aggregate, 25 parts by weight of coarse aggregate, 0.004 parts by weight of AE agent are mixed and kneaded with a mixer to produce ready-mixed concrete 4A. Was poured into the formwork 1. Then, it was tightened with a vibrator, naturally cured for 3 hours, low-pressure steam cured at 60 ° C. for 10 hours, the temperature was gradually lowered to room temperature, and cured for 1 day at room temperature to cure the concrete. Then, the mold 1 was removed to obtain the laminated body shown in FIGS. 3 and 4.

With respect to the laminate thus obtained, the adhesive strength between the vulcanized rubber tile 2 and the concrete structure 4B was measured and found to be 5.0 kg / inch (180 ° peel strength). on the other hand,
A laminate was produced using the same fresh concrete, adhesive and elastic surface layer material as above. First, the above-mentioned green concrete was poured into a mold to be molded, cured, and cured to obtain a concrete structure 4B. Then, on the back surface 2b of the elastic surface layer material 2,
The above-mentioned primer and adhesive were applied, the elastic surface layer material 2 was attached to the concrete structure 4B, and the adhesive was cured. The adhesive strength between the elastic surface material 2 and the concrete structure 4B of this laminate was measured to be 4.2 kg / inch (1
The peel strength was 80 °).

[0017]

As described above, according to the present invention, the adhesive is applied to the back surface of the elastic surface layer material, and the ready-mixed concrete is poured into the mold before the applied adhesive is hardened to prepare the ready-mixed concrete. Since the adhesive is cured while curing the, the time required to manufacture the laminate is greatly shortened,
The time and effort of the work are reduced, and the manufacturing cost is significantly reduced. Moreover, the adhesive strength between the elastic surface layer material and the concrete structure is increased as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state where an elastic surface layer material 2 is laid on the bottom of a mold 1.

FIG. 2 is a cross-sectional view showing a state where ready-mixed concrete 4A is poured into the formwork 1.

FIG. 3 is a cross-sectional view showing a state where the laminated body is demolded from the mold 1.

FIG. 4 is a plan view showing a state in which an elastic surface layer material 2 is laid.

[Explanation of symbols]

 1 Formwork 2 Elastic surface layer material 2a Front surface 2b Back surface 3A Unhardened adhesive 3B Hardened adhesive 4A Ready-mixed concrete 4B Concrete structure

Claims (1)

[Claims] 1. An elastic surface layer material is molded, and the elastic surface layer material is laid on the inner wall surface of a mold so that the surface of the elastic surface layer material abuts the inner wall surface, and an adhesive is applied to the back surface of the elastic surface material and applied. Pour fresh concrete into the mold before the adhesive is cured, and cure the raw concrete to obtain a concrete structure, and at the same time cure the adhesive to concrete structure and the elastic surface layer material. A method for manufacturing a laminate of an elastic surface layer material and a concrete structure, which are bonded together.