JP2010019001A - Concrete material - Google Patents

Abstract

[PROBLEMS] To provide a concrete member having phosphorescent properties without complicating the manufacturing process or requiring a specific member for manufacturing in comparison with ordinary concrete. Providing concrete materials that can actively contribute.
A concrete material is produced by mixing a material containing cement 1, water 2, an aggregate 3, an admixture 4 and a powdered phosphorescent phosphor 5 at a predetermined ratio. The concrete material 10 is used.
[Selection] Figure 1

Description

  The present invention relates to a concrete material used for road curbs, building materials, landscape members, and the like.

  Conventionally, for example, in order to enhance nighttime visibility such as curbs on roads, to enhance scenery such as buildings at night, or to show an evacuation route in the event of an emergency power outage, concrete is allowed to emit light. Has been done. Examples of technologies for emitting light from concrete include, for example, lighting equipment such as light bulbs and light-emitting diodes embedded in concrete, fluorescent materials such as fluorescent seals and reflectors attached to the concrete surface, A fluorescent paint is applied to the surface.

  However, the conventional techniques as described above have the following problems. In other words, if lighting equipment is embedded in concrete, there is a need for maintenance costs and maintenance work to supply power to the lighting equipment, and because of the need to secure space for lighting equipment, the concrete has sufficient strength. It may be difficult to ensure In addition, when a fluorescent member is attached to the surface of the concrete or a fluorescent paint is applied, it is difficult to maintain the light emission state due to damage or wear of the concrete surface. In addition, other problems include the need to embed lighting fixtures in concrete, attach fluorescent members, and apply fluorescent paint, which can be cumbersome for manufacturing and construction work, For example, the portion to be limited is limited to a part of the concrete surface.

  Therefore, in order to solve these problems, there is a technique in which the concrete member itself has a luminous property and the concrete member itself emits light (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3). Here, the phosphorescent property is a property that stores natural light or artificial light and continues to emit light even in a dark place or at night.

  Patent Document 1 discloses a technique regarding a concrete member having a concrete layer and a luminous layer formed on the surface thereof. This luminous layer is made of luminous aggregate produced by firing phosphorescent powder or the like in a mixture of resin or gravel. Moreover, in patent document 2, the concrete member which has luminous property is obtained by covering the surface of concrete with what added the substance which has a luminous function to resin which has water repellency etc.

  In patent document 1 and patent document 2, both the luminous materials for making a concrete member equip luminous property are used by mixing with resin etc. As described in Patent Document 1 and Patent Document 2, the fact that the phosphorescent material is used by being mixed with a resin or the like as described above has a phosphorescent function that decreases by reacting with water with respect to the phosphorescent material. It is thought to hold. That is, it is considered that the phosphorescent material generally used is weak against moisture and difficult to use in a state of reacting with water from the viewpoint of maintaining the phosphorescence. Therefore, conventionally, it is considered difficult to mix a phosphorescent material with a concrete material having moisture.

  Moreover, in patent document 3, the concrete member by which the phosphorescent granular material is embed | buried in the surface is disclosed. And when embedding phosphorescent granular material with respect to concrete material, the mold form with which many phosphorescent granular material was hold | maintained through the adhesive layer to which adhesive force reduces with a water | moisture content etc. is used. In other words, when concrete material is placed on the mold holding the phosphorescent granular material, the phosphorescent granular material held on the mold side is moved to the concrete material side by moisture in the concrete material. Is embedded in the concrete surface. The phosphorescent granular material used here includes a powdery phosphorescent phosphor itself or a powdered phosphorescent phosphor kneaded into a transparent resin and granulated.

  By the way, in recent years, “environment / ecology” has been adopted in various fields. In order to contribute to such an environment and ecology, a concrete member having a luminous property that can use natural light as described above is useful. And in order for the concrete member which has luminous property to be used more practically for contribution to an environment and ecology, it can manufacture by the simplest process as much as possible, and it is required to be excellent in versatility.

  From this point of view, the concrete members of Patent Document 1 and Patent Document 2 have a complicated manufacturing process in comparison with ordinary concrete that is generally used. That is, in manufacturing the concrete members of Patent Document 1 and Patent Document 2, a process of mixing a phosphorescent material with a resin or the like is required for ordinary concrete, so that the manufacturing process is relatively complicated. Become. In this regard, Patent Document 3 describes that the powdery phosphorescent phosphor itself is embedded in the concrete material as described above. Certainly, by using the powdery phosphorescent phosphor as it is, the step of mixing the phosphorescent material with resin or the like is omitted. However, according to the method for producing a concrete member disclosed in Patent Document 3, a mold that holds a large number of phosphorescent granular materials is required as a unique member that is not used in the production of ordinary concrete.

As described above, in the conventional technology, when obtaining a concrete member having a luminous property, in comparison with the case of ordinary concrete, the manufacturing process becomes complicated, or a special member is required, It seems difficult to actively contribute to the environment and ecology.
JP 2000-27114 A JP 2001-163687 A JP-A-9-254111

  The present invention has been made in view of the above-mentioned problems, and the problem to be solved is that the manufacturing process is complicated in comparison with ordinary concrete, and a unique member is required for manufacturing. It is an object of the present invention to provide a concrete material that can obtain a light-accumulating concrete member without making any changes, and can actively contribute to the environment and ecology.

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

  That is, in Claim 1, it is a concrete material which is produced by mixing a cement, water, an aggregate, an admixture, and a powdered phosphorescent phosphor in a predetermined ratio. It is what is done.

  In Claim 2, in the concrete material of Claim 1, content of the said luminous phosphor is about 10 to 40 weight%.

As effects of the present invention, the following effects can be obtained.
That is, according to the present invention, a concrete member having a luminous property can be obtained without complicating the manufacturing process in comparison with ordinary concrete or requiring a specific member in the manufacturing process.・ Can actively contribute to ecology.

Next, embodiments of the invention will be described.
The present invention is intended to obtain a concrete member having a luminous property by mixing a powdery phosphorescent phosphor together with water, aggregates and the like that are usually used in the production of concrete. is there. Therefore, the concrete material obtained by using the concrete material according to the present invention and curing in a state in which the predetermined shape is maintained stores natural light or artificial light and emits it as an energy source. Have

  As shown in FIG. 1A, the concrete material 10 of the present embodiment is made of a material including cement 1, water 2, aggregate 3, admixture 4, and powdered phosphorescent phosphor 5. It is generated by mixing at a predetermined ratio. And as shown in FIG.1 (b), the concrete material 10 is used, and the concrete member 11 which has luminous property is obtained by performing curing in the state by which the predetermined shape was hold | maintained. The concrete member 11 of this embodiment has a columnar shape as a predetermined shape.

  The cement 1 is not particularly limited, and various cement powders are used. As the cement 1, for example, Portland cement is used. The aggregate 3 is not particularly limited, and natural or artificial aggregate is used. As the aggregate 3, for example, fine aggregate such as river sand, mountain sand and sea sand, and coarse aggregate such as gravel and crushed stone are used.

  The admixture 4 is not particularly limited as long as it is a material miscible with cement, and an inorganic type or an organic type is used. Admixture 4 works by giving AE agent, AE water reducing agent, high performance water reducing agent, hardening accelerator, fluidizing agent, setting retarder, etc. to cement, thereby giving the concrete a predetermined function. Various materials that can improve workability and improve physical properties of concrete are included.

The powdery phosphorescent phosphor 5 is not particularly limited, and a powder material having a property of absorbing light of a specific wavelength, storing it as energy, and emitting light of another wavelength is used. The powdery phosphorescent phosphor 5 has an average particle size of several μm to 60 μm. The average particle diameter of the powdered phosphorescent phosphor 5 is preferably about 30 μm. Examples of the phosphorescent phosphor 5 include strontium aluminate (SrAl ₂ O ₄ , Sr ₄ Al ₁₄ O ₂₅ , calcium aluminate (CaAl ₂ O ₄ ), and barium aluminate (BaAl ₂ O ₄ ) as main components (mother). Crystals) and europium (Eu), dyspronium (Dy) and the like added as activators are used.

There are strength (nominal strength, design standard strength) and slump as important factors indicating the physical properties of concrete materials. That is, the concrete material has an appropriate strength and slump value depending on its use. For example, for concrete materials used as building materials, the strength is a nominal strength of 24 N / mm ² , and slump values such as 15 to 18 cm are used as appropriate values.

  These strength and slump values are greatly influenced by the ratio of water mixed in the concrete material 10 (water cement ratio). And about the powdery phosphorescent fluorescent substance 5 which reacts with water, the intensity | strength of the concrete material 10 falls and slump becomes long, so that content in the concrete material 10 increases. On the other hand, if the content of the phosphorescent phosphor 5 in the concrete material 10 is too small, the light emission due to the phosphorescence property (hereinafter simply referred to as “light emission amount”) of the concrete member constituted by using the concrete material 10 is obtained. Not enough.

  Therefore, in the concrete material 10 of the present embodiment, the content of the phosphorescent phosphor 5 is about 10 to 40% by weight. That is, in the concrete material 10, when the content of the phosphorescent phosphor 5 is about 10 to 40% by weight, sufficient strength, proper slump, and sufficient light emission amount can be obtained. The fact that the content of the phosphorescent phosphor 5 in the concrete material 10 is set in such a range will be specifically described with reference to FIG.

  FIG. 2 is a graph showing the relationship between the content of the phosphorescent phosphor 5 in the concrete material 10 and various physical properties of the concrete material 10. The data shown in FIG. 2 is for the concrete material 10 and a predetermined specimen (test piece) manufactured using the concrete material 10. In the present embodiment, the following concrete material 10 and test body are used.

Regarding the material constituting the concrete material 10, ordinary Portland cement is used as the cement 1. Further, as the aggregate 3, fine sand aggregates such as river sand, mountain sand and sea sand, and coarse aggregate gravel (maximum dimension 25 mm), crushed stone (maximum dimension 20 mm) and the like are used. Here, as the amount of chloride in the fine aggregate, NaCl is 0.04% or less. As the admixture 4, an AE agent or the like is used. The phosphorescent phosphor 5 is mixed with those in which these materials are mixed at a predetermined ratio. Then, each graph shown in FIG. 2 is obtained by changing the content of the phosphorescent phosphor 5. The phosphorescent phosphor 5 is composed of strontium aluminate (SrAl ₂ O ₄ , Sr ₄ Al ₁₄ O ₂₅ ) as a main component (mother crystal) and added with europium (Eu) and dysprosium (Dy) as activators. Is used.

  In addition, as the test body, about 3 to 5 are used in which the concrete material 10 mixed with the above materials is cured by steam curing into a cylindrical shape having a diameter of 10 cm and a length of 20 cm. That is, for the physical properties of the concrete material 10 measured using the test body, an average value, an appropriate value, or the like is appropriately used from the measured values of the plurality of test bodies.

  In FIG. 2, a graph G <b> 1 indicated by a two-dot chain line represents a relationship between the content of the phosphorescent phosphor 5 (% by weight, hereinafter simply referred to as “%”) and the light emission amount. As can be seen from the graph G1, the value of the light emission amount increases in proportion to the increase in the content value of the phosphorescent phosphor 5.

In FIG. 2, a graph G <b> 2 indicated by a solid line represents the relationship between the content and intensity of the phosphorescent phosphor 5. Here, the strength is a design reference strength (N / mm ² ). That is, the design standard strength is measured by performing a compression test or the like on a test body formed using the concrete material 10. The design standard strength has an allowable range when used as a concrete member (see strength allowable range Pr1). The allowable strength range Pr1 is for the case where the concrete material 10 is used as a building material and has a value of about 21 to 27 N / mm ² .

  As can be seen from the graph G2, the value of the design reference intensity is substantially constant when the content value of the phosphorescent phosphor 5 is in the range of 0% to about 28%. Here, the value of the design reference strength that is substantially constant corresponds to the upper limit value of the allowable strength range Pr1. The value of the design reference intensity decreases proportionally as the content value of the phosphorescent phosphor 5 increases from about 28%.

  In FIG. 2, a graph G3 indicated by a broken line represents the relationship between the content of the phosphorescent phosphor 5 and the slump (cm). As for slump, there is an allowable range in view of workability when the concrete material 10 is used (see the allowable slump range Pr2). The slump allowable range Pr2 is for the case where the concrete material 10 is used as a building material, and has a value of about 15 to 18 cm.

  As can be seen from the graph G3, the slump value of the concrete material 10 is substantially constant when the content of the phosphorescent phosphor 5 is in the range of 0% to about 30%. Here, the value of the slump that is substantially constant corresponds to the lower limit value of the slump allowable range Pr2. The slump value increases proportionally as the content value of the phosphorescent phosphor 5 increases from about 30%.

  In FIG. 2, a graph G <b> 4 indicated by a one-dot chain line represents a relationship between the content of the phosphorescent phosphor 5 and the material cost of the concrete material 10. As can be seen from the graph G4, the material cost of the concrete material 10 increases as the content value of the phosphorescent phosphor 5 increases, and the value of the content of the phosphorescent phosphor 5 peaks at about 10%. Become. And if the value of content of the luminous phosphor 5 becomes larger than about 10%, cost reduction will be achieved with the increase in the content.

  From the relationship between the content of the phosphorescent phosphor 5 in the concrete material 10 as described above and various physical properties of the concrete material 10, the content of the phosphorescent phosphor 5 in the concrete material 10 is about 10 to 40%. (See arrow range R in FIG. 2).

  That is, the content value of the phosphorescent phosphor 5 whose design standard intensity value is within the allowable intensity range Pr1 is smaller than about 40% (see graph G2). In other words, when the content value of the phosphorescent phosphor 5 is smaller than about 40%, the design reference strength is allowed. Thereby, the value of the upper limit side about the numerical range of the content of the phosphorescent phosphor 5 in the concrete material 10 is derived. In the range where the content value of the phosphorescent phosphor 5 is smaller than about 40%, the slump of the concrete material 10 is within the slump allowable range Pr2 (see graph G3).

  On the other hand, when the content value of the phosphorescent phosphor 5 is smaller than about 10%, a sufficient value for the light emission amount cannot be obtained (see graph G1). Thereby, the value on the lower limit side of the numerical range of the content of the phosphorescent phosphor 5 in the concrete material 10 is derived. That is, the lower limit value of the numerical range of the content of the phosphorescent phosphor 5 in the concrete material 10 is defined based on the light emission amount. If the content of the phosphorescent phosphor 5 in the concrete material 10 is at least about 10%, a desired light emission amount as a concrete member having phosphorescent properties can be obtained.

  Thus, the content of the phosphorescent phosphor 5 in the concrete material 10 is about 10 to 40%, and the higher the phosphorescent phosphor 5 content is advantageous in terms of light emission, Is small and the slump is large. On the other hand, if the content of the phosphorescent phosphor 5 is small, the strength and the slump are stable, but a sufficient light emission amount cannot be obtained.

  In addition, as is clear from FIG. 2, the upper limit value and the lower limit value in the numerical range are about 10 to 40%, which is the numerical range for the content of the phosphorescent phosphor 5 in the concrete material 10, respectively. Is intended to include a value of 10 ± several% and a value of 40 ± several%.

  As described above, according to the concrete material 10 of the present embodiment, the concrete having phosphorescent properties without causing the manufacturing process to be complicated or requiring a specific member for manufacturing in comparison with ordinary concrete. We can obtain members and can contribute positively to the environment and ecology.

  That is, according to the concrete material 10 of the present embodiment, the phosphorescent phosphor 5 is only mixed at a predetermined content with respect to a concrete material that is normally used, and the kind of the material to be mixed is one. It only increases. For this reason, when obtaining a concrete member having phosphorescent properties, there is no need for a separate step or the like in which the phosphorescent material is mixed with a resin or the like, and there is no need for special members. The apparatus can be used as it is. Thus, according to the concrete material 10 of this embodiment, the concrete member which has luminous property can be obtained by a very simple method.

  Moreover, since the concrete material 10 of this embodiment can be manufactured and used similarly to the concrete material normally used, it is excellent in versatility when obtaining the concrete member which has luminous property. That is, the concrete material 10 of this embodiment can be used at least for the use of a concrete material that is normally used. Moreover, according to the concrete material 10 of this embodiment, the energy (for example, electrical energy) only for making a concrete member light-emit is not required, but it is artificial from natural light which is the light from the sun, a lighting fixture, etc. By using the artificial light emitted to the concrete member, the concrete member can emit light. From these things, according to the concrete material 10 of this embodiment, it can contribute positively to environment and ecology.

  Moreover, according to the concrete material 10 of this embodiment, since the concrete member itself has a phosphorescent function, the light emitting state is not impaired even if the concrete surface is damaged or worn, and maintenance costs and maintenance are unnecessary. And construction work can be performed in the same way as ordinary concrete.

  In the present embodiment, the phosphorescent phosphor 5 is mixed in the concrete material 10 in order to obtain a concrete member having a phosphorescent property, but the finish coating material used as a building material is also the case of the above-described embodiment. Similarly, phosphorescence can be provided.

  Specifically, an acrylic copolymer resin emulsion is mentioned as a finish coating material. That is, in the same manner as the concrete material 10 in the above-described embodiment, in the case where the finish coating material is provided with phosphorescence, the phosphorescent phosphor 5 is 10% relative to the finish coating material such as an acrylic copolymer resin emulsion. About 40% is mixed. Thereby, the finish coating material which has luminous property is produced | generated. In this case, as the finish coating material, Jolipat (Aika Industry Co., Ltd., trade name) is suitably used as a commercially available product.

  Example 1 of the present invention will be described. In this example, ordinary Portland cement was used as the cement constituting the concrete material. Moreover, groundwater and supernatant water were used as water. Further, as aggregates, fine aggregate sand (average particle diameter 5 mm) and coarse aggregate crushed stone (particle diameter 5 to 20 mm) were used. Here, the chloride content of the fine aggregate is 0.005%. As an admixture, AE water reducing agent: Pozzolith No. 70 (BASF Pozzolith Co., Ltd., trade name) was used. The blending of these materials is as shown in the following table.

As described above, the concrete material of this embodiment in which the respective materials are mixed at a predetermined ratio has a nominal strength of 27 N / mm ² and a slump of 15 cm. A phosphorescent phosphor was mixed at about 10% with such a concrete material. As the phosphorescent phosphor, a trade name “N Yakko Luminova G-300 (chemical composition SrAl ₂ O ₄ : Eu, Dy)” manufactured by Nemoto Special Chemical Industry Co., Ltd. was used. The average particle size of the phosphorescent phosphor was about 30 μm. Such concrete material was steam-cured while maintaining a predetermined shape, thereby obtaining a concrete member having phosphorescent properties.

  Example 2 of the present invention will be described. In this example, the same material as in Example 1 was used as the material constituting the concrete material. The composition of each material is as shown in the following table.

As described above, the concrete material of this embodiment in which the respective materials are mixed at a predetermined ratio has a nominal strength of 21 N / mm ² and a slump of 18 cm. To such a concrete material, the same phosphorescent phosphor as in Example 1 was mixed at about 10%. Such concrete material was steam-cured while maintaining a predetermined shape, thereby obtaining a concrete member having phosphorescent properties.

  According to the concrete material of each of the above examples, an appropriate slump could be secured, and a concrete member having sufficient strength and light emission amount could be obtained.

  Examples of use of the present invention include not only road curbs, building materials and landscape members, but also evacuation routes during emergency power outages, road guardrails, tunnel walls, pool sides, sales as concrete blocks, etc. Depending on the device, various uses are possible. In addition, since the concrete material of the present invention consumes no energy to emit light from the concrete member, it contributes not only to the environment and ecology, but also to depopulated areas where infrastructure is inaccessible, as well as a living infrastructure for developing countries. Application to the field of vision is included. Furthermore, according to the concrete material of the present invention, since the concrete part itself such as the building itself emits light, there is a possibility of spreading to various fields such as construction of civil engineering infrastructure from urban planning and landscape design.

The figure which shows the structure of the concrete material which concerns on one Embodiment of this invention. The figure which shows the relationship between content of powdery phosphorescent fluorescent substance, and the physical property of concrete material.

Explanation of symbols

1 Cement 2 Water 3 Aggregate 4 Admixture 5 Phosphorescent Phosphor 10 Concrete Material 11 Concrete Member

Claims (2)

  A concrete material produced by mixing a material containing cement, water, aggregate, admixture, and powdered phosphorescent phosphor in a predetermined ratio.   The concrete material according to claim 1, wherein the content of the phosphorescent phosphor is about 10 to 40% by weight.

Images