JP2019078126A - Snow melting functional concrete product - Google Patents

Abstract

To provide a snow melting functional concrete product such as a concrete plate or an interlocking block capable of improving snow melting performance and also improving strength exerted on a bending load (bending strength).SOLUTION: In a snow melting functional concrete product manufactured by precasting, a granular carbon material which is a ceramic-like carbon material having crystallizability exceeding at least Bincho charcoal and having high radiation performance of far-infrared radiation is mixed as fine aggregate instead of a part of sand. Furthermore, a ratio of the granular carbon material instead of the sand is 10 to 20 percent of the volume of the sand, and the granular carbon material is adjusted to have the grain size of 0.5 to 3.0 mm, so that it is possible to appropriately improve the performance of the concrete product.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a snow melting functional concrete product manufactured by precasting.

  Conventionally, it has been the best way to prevent snowfall on the road surface by snow melting, which is the best way to prevent a person or a vehicle from slipping. However, the snow melting requires thermal energy. For this reason, providing special facilities, such as burying an electric heating body as a heat source, and heat energy consumption tend to become large, and it becomes a subject to reduce these costs.

  On the other hand, conventionally, as a means capable of efficiently using thermal energy, for example, a mixture of far-infrared radiation ceramic powder and sand, gravel, volcanic gravel, etc. at a predetermined ratio is applied on a paved road to a predetermined thickness. It has been proposed to spray and dry a material which has been coated and ground, or a mixture of far-infrared radiation ceramic powder and sand, gravel, volcanic crucible, etc. and sprayed and dried on a roofing material (see Patent Document 1). .

  Also, conventionally, a heat insulation base layer is formed by mixing a material having low thermal conductivity and excellent thermal insulation in the base layer, and a snow melting surface layer made by mixing a material having high thermal conductivity is formed on the surface layer. About 30% of the heat from the heat is transmitted downward, about 70% is transmitted upward, and the heat is efficiently transmitted to the road surface, so energy consumption is also less than conventional (see Patent Document 2). There is.

  Furthermore, conventionally, a snow melting and heat retention heating block comprising a flat plate-like substrate part, wherein the substrate part of the snow melting and heat retention heating block is made up of a plurality of particles made of a hard material interposed between the particles. And a material having a porous structure in which a large number of water-permeable pores are formed by being intermittently bonded to each other through the bonding agent. The support plate portion having a lattice shape and the elongated heating element portion disposed along the flat surface portion of the support plate portion are disposed, and at least the bottom surface portion of the substrate portion. As a part, a snow melting and heat retention heating block (see Patent Document 3) which is formed in a projecting shape with a predetermined height from the bottom portion is proposed. The granular material here is assumed to have an average particle diameter of 3 mm to 7 mm, and the bonding agent here is assumed to be mainly composed of an epoxy-based synthetic resin component.

  However, in these prior art documents, far-infrared radiation ceramic powder or ceramic fine particles or crushed bodies are those sintered by minerals not containing carbon at all, or containing carbon as a part of a small amount of compound. There is no disclosure of a concrete product which is produced by mixing a cement-like carbon material which is high in crystallinity of single carbon and is mixed with cement.

JP 05-65703 A (page 1) JP-A-11-131414 (Page 1) JP, 2015-135027, A (page 1)

  The problems to be solved with regard to snow melting functional concrete products are conventionally proposed to enhance the snow melting function by mixing ceramics, but it is possible to appropriately radiate far infrared rays and to increase the strength of concrete products What can be done is that it has not been proposed.

  Therefore, an object of the present invention is to provide a snow melting functional concrete product such as a flat concrete plate or an interlocking block which can improve snow melting performance and can also increase strength (bending strength) applied to a bending load.

The present invention comprises the following configuration to achieve the above object.
According to one embodiment of the snow melting functional concrete product according to the present invention, the snow melting functional concrete product manufactured by precasting is a ceramic carbon material having a crystallinity of at least Bincho charcoal and high radiation of far infrared rays. It is characterized in that the particulate carbon material having the function is mixed as a fine aggregate replacing a part of the sand.

  Further, according to one aspect of the snow melting functional concrete product according to the present invention, the ratio of the granular carbon material to the sand is between 10% and 20% of the volume of the sand. be able to.

  Moreover, according to one aspect of the snow melting functional concrete product according to the present invention, the granular carbon material can be characterized in that the particle diameter is adjusted to 0.5 to 3.0 mm.

  According to the snow melting functional concrete product of the present invention, the snow melting performance can be enhanced, and the strength applied to the bending load (bending strength) can also be enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the form example of the snow melting functional concrete product concerning this invention. It is sectional drawing which shows the example of installation of the snow melting functional concrete product concerning this invention. It is sectional drawing which shows the other example of installation of the snow melting functional concrete product concerning this invention.

  Hereinafter, embodiments of the snow melting functional concrete product according to the present invention will be described in detail based on the attached drawings (FIGS. 1 to 3). The present embodiment relates to a snow melting functional concrete product manufactured by precasting.

  The snow melting functional concrete product according to the present invention is a ceramic-like carbon material having a crystallinity of at least Bincho charcoal, and a particulate carbon material having high far-infrared radiation performance, a fine bone substitute for a part of sand. It is characterized in that it is mixed as a material.

  According to this, with regard to snow melting functional concrete products such as flat concrete plates and interlocking blocks, snow melting performance can be further enhanced, and strength (bending strength) applied to bending load can be enhanced. In addition, when the low crystalline carbon black which is not ceramic-like is mixed, compared with the ceramic-like carbon material concerning this invention, the radiation performance of far infrared rays is inferior, and the intensity | strength of a concrete product falls.

  In addition, when the ratio of the granular carbon material to the sand is in the range of 10% to 20% of the volume of the sand, it is possible to effectively improve the snow melting performance by far infrared rays, and to reduce the bending load. Such strength (bending strength) can be enhanced as much as possible. In addition, bending strength was measured by the test method prescribed | regulated to JIS A 5371, and according to the snow melting functional concrete product concerning this invention, the strength could be improved 10 to 15%.

  Furthermore, the said granular carbon material can improve snow melting performance and intensity | strength as much as possible by adjusting a particle size to 0.5-3.0 mm. This is because the ceramic-like carbon material according to the present invention itself has better far-infrared radiation performance and strength, and the particle diameter is adjusted to properly act as a fine aggregate.

  According to this, since the structure of the concrete product can be enhanced, a relatively thin plate-like concrete flat plate or an interlocking block having a thickness of 50 mm or less can be appropriately formed. For this reason, it is suitably applicable also to the concrete product required preferentially as a social infrastructure like the Braille block 11 (refer FIG. 1).

  Moreover, according to the snow melting functional concrete product laid on the ground such as a flat concrete plate or an interlocking block according to the present invention, since it is excellent in heat transport, it not only exhibits the snow melting function as described above, but also summer When the temperature rises, the heat of the air can be effectively dissipated to the ground, and the concrete product itself can be appropriately prevented from being overheated.

The specifications of the particulate carbon material in this example are fine aggregate of concrete and mortar, and the component is fixed carbon 99% or more (ash content 0.1% or less), true specific gravity is 2.23 g / cc, particle diameter is 0.5 to 3.0 mm, thermal expansion coefficient of 2.5, thermal conductivity of 0.4 to 0.7 kcal / mh ° C., hardness shore of 35 kg / cm ² and water absorption of 4.35%, A high thermal conductivity ceramic [far-red element] manufactured by Japan Mellow Snow Co., Ltd. (Noraki 2-chome 3-chome, Nagaoka, Niigata Prefecture) satisfying this specification can be used.

  The particulate carbon material according to the present embodiment has a feature of emitting far infrared rays under the environment with a heat source and returning snow or ice to water by friction caused by vibration of hydrogen molecules. Therefore, in the situation where no energy is supplied (no heat source) when freezing completely below 0 ° C., the effect of snow melting can not be generated.

  Heat sources such as sunlight (sunlight), road heating (using heating wire, etc.), far infrared radiation, snow removal system, heat pump, heat transfer materials, heat transfer materials to pavement materials and far-red elements such as geothermal It is. That is, the paved surface is exposed and the weather conditions are good and not frozen, or the paved surface is 1 to 2 ° C or more by the supply of energy from this heat source, such as forced energy supply means. The effect of the snow melting functional concrete product according to the present invention can be obtained.

  The snow melting functional concrete products according to the present invention are not limited to pavements of road surfaces (general walkways), but there are more entrances, porches, stairs, slopes, barrier-free sections of public facilities, bus stops, taxi entrances, walkways, etc. It can be suitably installed and used in places where it is used for occasions or slippery places.

  As a laying method, as shown in FIG. 2, it is an example of installation of walkway pavement, and when sufficient sunshine conditions are expected during the day, a layer of sand or mortar 40 is placed on the road body 20. The snow melting concrete flat plate 10 may be installed. In addition, when a stable snow melting effect is expected for 24 hours regardless of day or night, a layer of foundation concrete 30 is provided on the road body 20 as shown in FIG. A heat source 50 such as a cable may be laid, and the snow melting concrete flat plate 10 may be installed via a bed of sand or mortar 40.

  Although the present invention has been variously described with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is

10 snow melting concrete plate 11 braille block 20 road body 30 base concrete 40 laying sand or mortar 50 heat source

Claims (3)

  In a snow melting functional concrete product manufactured by precasting, a particulate carbon material which is a ceramic-like carbon material having a crystallinity of at least Bincho charcoal and which has high far-infrared radiation performance is a fine carbon material which replaces a part of sand. A snow melting functional concrete product characterized in that it is mixed as an aggregate.   The snow melting functional concrete product according to claim 1, wherein the ratio of the granular carbon material to the sand is between 10% and 20% of the volume of the sand.   The snow melting functional concrete product according to claim 1 or 2, wherein the particulate carbon material has a particle diameter adjusted to 0.5 to 3.0 mm.

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