JP6160946B2 - Construction method of antibacterial concrete floor - Google Patents

Description

  The present invention relates to an antibacterial concrete floor construction method for constructing a concrete floor having antibacterial performance.

  In building facilities such as medical facilities and elderly facilities, antibacterial concrete floors that have antibacterial properties are used for the concrete floors that make up the indoor floor in order to save labor in hygiene management and prevent the spread of infection within the facilities. It is considered that the concrete floor itself exerts a permanent antibacterial action.

  Conventionally, in order to construct such an antibacterial concrete floor, a method of placing a fine-grained antibacterial agent into a kneading means such as an agitator and kneading it with ready-mixed concrete before placing the concrete (for example, , See Patent Document 1), and a method of using an aggregate impregnated with an antibacterial agent for a concrete floor (see, for example, Patent Document 2) is known.

  As another method for constructing an antibacterial concrete floor, a liquid containing at least a mixture of a powdery antibacterial agent and a water-soluble paste is applied to the inner surface of a concrete floor construction formwork. There is also known a construction method in which an antibacterial agent is impregnated from the mold surface into the concrete by pouring concrete into the concrete surface and the antibacterial agent is contained in the concrete surface facing the mold material coated with the liquid (for example, patents) Reference 3).

  Furthermore, after the ready-mixed concrete is cast and before the surface layer of the cast ready-mixed concrete is hardened, an antibacterial mixed powder containing at least cement, aggregate and an inorganic antibacterial agent is uniformly applied to the cast concrete surface layer. The antibacterial mixed powder spreads and absorbs excess water that floats on the concrete surface by bleeding and hydrates with it, so that an antibacterial concrete layer integrated with the surface layer of the cast concrete is formed. A construction method has also been developed (see, for example, Patent Document 4).

Japanese Patent Laid-Open No. 11-079920 JP 2008-214160 A JP 09-263466 A Japanese Patent Laid-Open No. 08-184165

  However, in the conventional technique described in Patent Document 1, since the antibacterial agent is put into the kneading means such as the agitator and kneaded, the antibacterial agent may remain attached in the container of the kneading means such as the agitator. Therefore, it was difficult to use the kneading means such as the agitator for the production of other types of concrete on the same day.

  In addition, at the construction site, it is necessary to stir at high speed to knead the antibacterial agent into the ready-mixed concrete having a certain viscosity using a kneading means such as an agitator. In urban areas, noise and vibration are generated at that time. Sometimes it became a problem. Furthermore, if the kneading is insufficient, the antibacterial agent is not uniformly dispersed in the ready-mixed concrete, and the antibacterial effect may not be stably exhibited.

  In the conventional technique described in Patent Document 2, it is necessary for the antibacterial agent to be exposed on the surface of the concrete floor in order to exert its effect. However, the antibacterial agent impregnated in the aggregate is separated from the aggregate. It was not always exposed on the concrete floor surface, and it was difficult to say that the concrete floor surely exhibited antibacterial action.

  Furthermore, in order to impregnate the aggregate with the antibacterial agent, special equipment is required, and there is a problem that it is difficult to manufacture in a general aggregate plant or ready-mixed concrete factory.

  In addition, the conventional techniques such as Patent Document 1 and Patent Document 2 are based on an aggregate in which an antibacterial agent or an antibacterial agent is impregnated on the entire concrete floor only in order to expose the antibacterial agent to the concrete floor surface that requires an antibacterial effect. Since most of the antibacterial agents used do not perform their functions, it is difficult to say that it is a rational method of construction. There was a problem that the cost increased.

  In the conventional technique described in Patent Document 3, a certain amount of antibacterial agent is impregnated into a mold material coated with a liquid containing an antibacterial agent and does not penetrate into the concrete side, and a desired antibacterial effect cannot be obtained. There was a fear. In addition, the compatibility with the release agent used in the formwork and the possibility of combined use are required to be examined, and in some cases, it cannot be used.

  Furthermore, when a concrete floor is constructed, there is a problem that an antibacterial effect cannot be obtained in a necessary portion when a formwork material is not used for the arrangement facing the floor surface.

  In the conventional technique described in Patent Document 4, it is considered that the antibacterial agent exposed to the concrete floor surface decreases with the aging of the concrete floor due to wear or peeling, and long-term antibacterial effect is desired. Yes.

  Therefore, in view of such a conventional problem, the present invention aims to provide a method for constructing an antibacterial concrete floor that can exhibit the antibacterial performance only in a necessary part to rationalize the construction and has excellent durability. It was made as.

The feature of the invention according to claim 1 for solving the above-mentioned conventional problems is that a predetermined amount of fine inorganic antibacterial agent is applied to the surface of the placed concrete before the placed concrete is cured. sprayed with antibacterial agent slurry comprising suspended in water, while leveling the concrete surface antimicrobials slurry is sprayed, the task of Ru impregnated with the antimicrobial agent in the surface layer of the concrete was the punching setting, concrete Repeated a plurality of times according to the drying condition, and then, there is an antibacterial concrete floor in which the antibacterial concrete layer containing the antibacterial agent is formed on the surface layer part of the concrete floor by hardening of the placed concrete .

  The feature of the invention described in claim 2 is that, in addition to the structure of claim 1, in the operation of leveling the concrete surface on which the antibacterial agent slurry is dispersed, the concrete surface is pressed by a frame.

Construction method of antimicrobial concrete floor according to the present invention, as described above, before the concrete is pouring is cured, suspending a predetermined amount of the fine particulate inorganic antibacterial agent in the water on the surface of the ball striking setting concrete is not sprayed antimicrobial agent slurry comprising, while leveling the concrete surface antimicrobials slurry is sprayed, the task of Ru impregnated with the antimicrobial agent in the surface layer of the concrete was the punching set, fit to dryness degree of the concrete A plurality of times, and then the antibacterial agent-containing concrete surface layer portion is formed by forming the antibacterial concrete layer containing the antibacterial agent on the surface layer portion of the concrete floor by hardening of the placed concrete. Therefore, it is possible to form an antibacterial concrete layer having an antibacterial agent only on the concrete surface layer portion, and to suppress the amount of antibacterial agent used. It is possible to streamline the construction of sex concrete floor.

  Further, in the present invention, by repeating the antibacterial agent dispersion diffusion step consisting of the work of spraying the antibacterial agent slurry and the work of leveling the concrete surface on which the antibacterial agent slurry is dispersed, by repeating a plurality of times at intervals, The antibacterial agent can be gradually permeated into the concrete surface layer portion to form an antibacterial concrete layer having a certain depth in the concrete surface layer portion, and the antibacterial effect can be maintained for a long time.

  Furthermore, in the present invention, in the operation of leveling the concrete surface on which the antibacterial agent slurry is dispersed, the concrete surface layer portion can be suitably impregnated with the antibacterial agent by pressing the concrete surface with a frame.

It is a partial expanded sectional view which represents typically the state of the concrete surface part of each process in the construction method of an antibacterial concrete floor concerning the present invention.

  Next, an embodiment of the method for constructing an antibacterial concrete floor according to the present invention will be described based on the embodiment shown in FIG. 1 (a) to 1 (f) are partial enlarged cross-sectional views schematically showing the state of the concrete surface portion in each process for constructing the antibacterial concrete floor.

  In the method of the present invention, as concrete preparation, ready-mixed concrete 1 and antibacterial agent slurry 2 for a concrete floor are prepared.

  The ready-mixed concrete 1 is not particularly limited, but generally mixed and kneaded so as to be used for construction of a concrete structure such as an RC structure.

  The antibacterial agent slurry 2 is a dispersion (suspension) of a predetermined amount of fine granular antibacterial agent 3, 3..., Which is adjusted by adding an additive as necessary. The granular antibacterial agents 3, 3 ... are evenly dispersed.

As the antibacterial agent 3, 3 ... , it is preferable to use an inorganic antibacterial agent in view of water solubility, safety, and the like. For example, the antibacterial agent 3, 3 ... In addition, a fine particle having an average particle diameter of about 2.5 μm is used.

  As the metal ions, silver ions are mainly used, but other than these, copper ions, zinc ions, sodium ions and the like can be used, or a combination thereof may be used.

  The inorganic compound is not particularly limited, and for example, an inorganic ion exchanger such as zeolite or an inorganic adsorbent such as activated carbon is used.

  In addition, you may use an off-the-shelf commercial item for this fine-grained antibacterial agent 3,3 ..., and the antibacterial agent slurry 2, and specifically, "Zeomic (an antibacterial agent containing silver ion) by Sinanen Zeomic Co., Ltd. Zeolite agent) ”and the like.

  In order to construct an antibacterial concrete floor using the ready-mixed concrete 1 and the antibacterial agent slurry 2, first, as shown in FIG. 1 (a), the ready-mixed concrete is placed on a concrete floor construction form (not shown). 1 is placed.

  Next, as shown in FIGS. 1B to 1E, before the placed concrete 1 is hardened, the entire surface of the placed concrete 1 is roughened when the concrete 1 surface is roughened. Sprinkle antibacterial agent slurry 2 using a sprayer or the like, and impregnate the surface layer portion of the placed concrete 1 with antibacterial agent 3, 3,. .

  At that time, an antibacterial agent spraying and diffusion process comprising the work of spraying the antibacterial agent slurry 2 and the work of leveling the surface of the concrete 1 on which the antibacterial agent slurry 2 has been sprinkled is repeated a plurality of times with a time interval. , 3 ... are preferably impregnated stepwise into the concrete 1 surface layer.

  Each antibacterial agent spreading and diffusion process is performed according to the dryness of the concrete 1 surface, and the timing thereof is not particularly limited. For example, the first time according to the timing of finishing work performed when constructing a standard concrete floor. Performed when the bleeding water that has oozed out is drawn, and the second time when the curing progresses to the extent that the finger marks remain when touching the concrete 1 surface, and the third time the finger marks are gradually increased by pressing the concrete 1 surface strongly. When the curing has progressed to the extent that remains.

The total amount of the antibacterial agent slurry 2 applied is based on the amount of the antibacterial agent per unit floor area required to exert the desired antibacterial action. For example, in a facility such as a hospital facility, The standard usage per area is about 10 g / m ² .

  Moreover, the amount of each application is applied in an appropriate amount in consideration of the dryness of the concrete 1 surface.

  Moreover, in each antibacterial agent dispersion | distribution spreading | diffusion process, as shown in FIG.1 (b) (d), after spraying the antibacterial agent slurry 2, as shown in FIG. The slurry 2 is uniformly diffused on the surface of the concrete 1, and then, as shown in FIGS. 1C and 1E, the surface of the concrete 1 is pressed by a frame 4 such as a gold iron to perform press finish.

  Thereby, in each antibacterial agent dispersion | distribution spreading | diffusion process, the antibacterial agent slurry 2 osmose | permeates the surface of the concrete 1 cast in the state diffused uniformly on the concrete 1 surface part, and the fine granular material contained in the antibacterial agent slurry 2 is included. Antibacterial agents 3, 3 ... are impregnated on the surface layer of the concrete.

  Then, in accordance with the condition of the surface of the concrete 1, the concrete 1 is cured while being wet-cured so that the surface does not dry, so that the antibacterial agent 3, 3. An antibacterial concrete floor 6 having an antibacterial concrete layer 5 containing.

  In the antibacterial concrete floor 6 constructed by the method thus configured, the antibacterial concrete layer 5 having the antibacterial agents 3, 3... Is formed only on the surface layer portion of the concrete 1. The usage amount of 3 ... can be suppressed and the construction of the antibacterial concrete floor 6 can be rationalized.

  Further, in the method of the present invention, the antibacterial agent 3, 3... Is impregnated into the surface layer portion of the concrete 1 before the concrete 1 is cured, and then the concrete 1 is cured. It is firmly held on the floor surface.

  Further, in the method of the present invention, as shown in FIGS. 1B to 1E, the antibacterial agent 3, 3... Since the impregnated antibacterial agent 3,3 ... reaches a depth of several millimeters from the surface of the concrete 1, a new antibacterial agent 3,3 ... is always added to the concrete floor even if the concrete floor deteriorates over time. It is exposed on the surface and the antibacterial effect lasts forever.

  Furthermore, in the antibacterial agent dispersion / diffusion process, the antibacterial agent slurry having moisture can be dispersed according to the dryness of the concrete surface to supply moisture to the concrete surface and prevent cracks after the concrete has hardened. .

DESCRIPTION OF SYMBOLS 1 Concrete 2 Antibacterial agent slurry 3 Antibacterial agent 4 Housing 5 Antibacterial concrete layer 6 Antibacterial concrete floor

Claims (2)

Before the cast concrete hardens, an antibacterial agent slurry in which a predetermined amount of fine inorganic antibacterial agent is suspended in water is sprayed on the surface of the cast concrete, and the antibacterial agent slurry is sprayed. while leveling the concrete surface concrete, the task of Ru impregnated with the antimicrobial agent in the surface layer of the concrete was the punching set, repeated several times in accordance with the dry condition of the concrete, after which the curing of the punching setting concrete An antibacterial concrete floor construction method characterized in that an antibacterial concrete layer containing the antibacterial agent is formed on the surface layer of the floor.   The method for constructing an antibacterial concrete floor according to claim 1, wherein the concrete surface is pressed by a frame during the work of leveling the concrete surface on which the antibacterial agent slurry is dispersed.

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