JP3520979B2 - Road surface construction method, pavement road using thermal storage material, and building material using thermal storage material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a road surface for use by people, vehicles, etc., a paved road using a heat storage material, and a building material using the heat storage material. In particular, the present invention relates to a road surface construction method for paving the road surface so that snow can be effectively melted by using the heat storage material, a paved road using the heat storage material, and a building material using the heat storage material.

[0002]

2. Description of the Related Art Conventionally, freezing of a road surface in a snowy cold region has been a serious and social problem for people living in the snowy cold region. In particular, in the present situation where cars have become an indispensable means of transportation for social life, measures against road surface freezing in snowy and cold regions have become an important and urgent task.

[0003] In this anti-freezing measure, as a measure from the side of the vehicle, spiked tires have been widely used due to their reliability in safety, but the spiked tires cause wear on the road surface, which results in dust pollution and pollution. Pavement damage has become a social problem. For this reason, nowadays
The use of spiked tires is prohibited, and studless tires and chains are used. Here, studless tires and the like are significantly less reliable than spiked tires, resulting in frequent accidents and inefficient distribution.

On the other hand, various measures have been introduced to the road surface due to the seriousness of snow and freezing.
For example, there is a method of spraying calcium chloride on the road surface, sprinkling groundwater, or heating the road surface with a heating wire or hot water. In addition, recently, improvement technology for the road surface itself has been introduced, and elastic bodies (rubber, urethane, etc.) are press-fitted to prevent ice accretion by using its elasticity, and calcium chloride, etc. is pre-pressed during road surface construction. However, various methods such as exerting a snow melting effect are used.

A road structure using a heat storage material is also shown as a prior art. For example, Japanese Patent Laid-Open No. 7-243202
In the paved road storing the heat storage material and the bridge storing the heat storage material disclosed in Japanese Patent Laid-Open No. 8-165612 and Japanese Patent Laid-Open No. 8-165612, the storage container is filled with the heat storage material that changes phase from liquid to solid, and the outside The road surface is prevented from freezing by the phase change of the heat storage material due to the heat of the air temperature (road surface temperature).

Further, as a technique which dislikes the storage container, Japanese Patent Laid-Open No. 5-214710 discloses a conventional heat storage type road surface structure. In this conventional heat storage type road surface structure, the heat storage generated by mechanically mixing a paraffin and a binder composed of a hydrocarbon-based organic polymer is regarded as a fatal defect due to the phase change of the heat storage material. By using a mixture that does not liquefy (phase change) at times, road surface construction becomes simple and easy, and construction costs can be reduced.

[0007]

However, according to the conventional paved road storing the heat storage material and the bridge storing the heat storage material as disclosed in JP-A-7-243202 and JP-A-8-165612. However, since the heat source of the heat storage material is the outside air temperature, there is a problem that the heat storage function cannot be sufficiently exerted during snowfall or low temperature.

[0008] Further, since a storage container for the heat storage material is installed in a considerable proportion under the road surface, there is a cost associated therewith, and further, a problem of the pavement structure occurs due to the durability of the storage container, and the technique is used. There was a problem that it was difficult.

Further, according to the conventional heat storage type road surface structure as disclosed in Japanese Patent Laid-Open No. 5-214710, since the heat pipe is used as the heat source of the heat storage material, installation and maintenance of the heat pipe are expensive, There was a problem that it lacked versatility.

That is, the conventional technique using the above-mentioned heat storage material has a problem in that it is not versatile in terms of economy and construction, because innumerable heat pipes are laid inside the pavement.

Further, in the conventional spraying of calcium chloride, there is a problem that it causes a salt damage and adversely affects the surrounding natural environment. Also,
The conventional method using groundwater has a problem that groundwater may be subsided because groundwater is pumped from the ground and used.

Further, the method using an elastic body cannot be expected to be effective, and even in the method of press-fitting calcium chloride, there are problems in its effect and durability.

The present invention has been made in view of such problems, and an object thereof is a method for constructing a road surface having a snow melting function which is low in cost, effective and practical, a pavement using a heat storage material, And to provide building materials using heat storage materials.

[0014]

In order to solve the above-mentioned problems, the road surface construction method of the first aspect of the present invention is, in the road surface pavement, on the surface of the asphalt mixture which is the surface layer thereof,
A ceramic heat storage material having a predetermined particle diameter is dispersed as a predetermined proportion of aggregate, and the surface of the asphalt mixture on which the ceramic heat storage material is dispersed is compacted and finished.

In order to solve the above-mentioned problems, the road surface construction method according to the second aspect of the present invention uses a part or all of the asphalt mixture which is the surface layer of the road surface pavement.
Kneading the heat storage material and the aggregate of ceramic-based, ceramic
It is characterized in that it is finished as a surface layer of a pavement to a predetermined thickness with an asphalt mixture in which a heat-storing material of the kussu type is kneaded.

In the road surface construction method described above, when the surface layer of the road surface pavement is made of the asphalt mixture, the heating element can be installed in or on the lower surface of the asphalt mixture. It is also possible to use concrete mixtures or resin mixtures instead of asphalt mixtures.

The asphalt mixture, concrete mixture or resin mixture can also be a water permeable asphalt mixture, a water permeable concrete mixture or a water permeable resin mixture.

In order to solve the above-mentioned problems, the paved road of the present invention is characterized in that a part or all of the aggregate contained in the paving material used for the surface layer is made of a ceramic heat storage material. Here, the heating element may be installed in or on the lower surface of the ceramic pavement material used for the surface layer. Further, the ceramic-based pavement material used for the surface layer may be a water-permeable asphalt mixture, a water-permeable concrete mixture, or a water-permeable resin mixture.

Further, in order to solve the above problems, the building material of the present invention comprises a part or all of the aggregate contained in the composition.
It is characterized by using a ceramics heat storage material. Here, it is also possible to have a water permeable function.

Since the ceramic heat storage material having sufficient strength is used as the whole or a part of the aggregate of the pavement or the building material used as the pavement material, it is excellent in economical efficiency, the workability is improved, and the extremely excellent snow melting effect is obtained. Have.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The road surface construction method of the present invention, a paved road using a heat storage material, and a building material using the heat storage material will be described in detail below.

The basic construction method of the road surface for use by people and vehicles according to the present invention is the same as the construction method of asphalt pavement, concrete pavement or resin pavement. Here, the difference between the present invention and the conventional road surface construction method, that is, the feature of the present invention lies in the aggregate scattered on the pavement surface.

Part or all of the aggregate used in the present invention is composed of a ceramic heat storage material having sufficient strength as an aggregate for paving. The particle size of this heat storage material is
As a size suitable for the road surface, generally 2.5 to 30
[Mm], and in particular, 5 to 20 [mm] is a desirable particle size. Here, as specific examples of the heat storage material, there are heat storage ceramics whose main component is apatite, a molded sintered body of magnesium / silicon oxide powder, and a material whose main raw material is converter dust.

Further, the on-site construction method of the heat storage material sprayed on the surface of the surface layer mixture can be carried out in the same manner as the rolled construction method in asphalt pavement.

Here, as described above, in the present invention, the heat storage material can be used for all the aggregates of the mixture. However, economically, it is effective to mainly use commonly used aggregates such as sandstone, and it is effective to spread the heat storage material on the surface, and consider the road surface temperature and the amount of snow cover etc. It is decided by putting in, but about the general spray amount is 1
-100 [kg / m ² ], preferably 10-50 [kg
/ M ² ].

As described above, the heat storage material used in the road surface construction method of the present invention is a ceramic material having a sufficient strength as a pavement aggregate. For this reason,
It is impossible to use a conventional heat storage material that undergoes a phase change from a liquid to a solid as a paving aggregate as in the present invention because of its strength, and a mixture of paraffins and a hydrocarbon organic polymer. Even a conventional heat storage material that does not have a phase change like that does not have strength as pavement aggregate,
It cannot be used as pavement aggregate as in the present invention.

FIG. 1 is a diagram showing a cross section of a paved road using the heat storage material constructed as described above. Hereinafter, a specific construction method according to the road surface construction method of the present invention will be described.

First, on the subgrade soil 1, the thickness is 15 [cm].
Roadbed materials such as crushed stones 2 are laid so that the degree is about the same, and base layer asphalt mixture (dense particle size ascon) 3 4
An asphalt pavement is prepared with the surface layer asphalt mixture (dense particle size ascon) 4 so that the thickness is about 4 cm to 5 cm and the thickness is about 4 to 5 cm. Then, on the surface of the asphalt pavement (base layer asphalt mixture 3 and surface layer asphalt mixture 4), a ceramic heat storage material 5 having a particle size of about 13 [mm] was sprayed at a rate of 30 [kg / m ² ], The surface is finished by compaction such as roller compaction.

A road surface having a cross section as shown in FIG. 1 was used as a test piece, and after the surface temperature of the test piece was set to 5 [° C.], the heat storage material 5 was placed in a constant temperature room of −2 [° C.]. The time course of the surface temperature was recorded and the snowmelt condition of the snow scattered on the surface of the specimen was observed. Here, for simultaneous comparison, an asphalt mixture using hard sandstone, which is usually used as an aggregate, was prepared and observed under the same conditions.

FIG. 2 is a diagram showing changes over time in the surface temperature of the heat storage material-mixed specimen and the heat storage material-non-mixed specimen. Figure 2
As shown in FIG.
It was possible to maintain a sufficient surface temperature to obtain a sufficient snow-melting effect even after a lapse of time, but the specimen constructed by the conventional method has lost its snow-melting effect after about 1 hour. . That is, as shown in FIG. 2, the effect of heat storage was clearly confirmed by the present invention, and the difference in snow melting was also significantly confirmed.

The heat storage material 5 as described above efficiently stores the heat in the atmosphere which is relatively high during the day, and the snow on the road surface can be melted by this heat storage. Therefore,
Unlike the conventional calcium chloride, the present invention has no problem in terms of sustainability and can be used semipermanently.

FIG. 3 is a view showing a cross section of a paved road using a heat storage material constructed by another construction method of the present invention. 3 is different from FIG. 1 in that a planar heating element 6 that generates heat using electric power or the like as a heat source is provided on the lower surface of the surface layer asphalt mixture 4.

Heat is supplied to the heat storage material 5 by the sheet heating element 6, and snow melting can be performed more effectively.

For example, the lower surface of the surface layer asphalt mixture 4 mixed with the heat storage material 5, which is approximately 2 to 10 from the road surface.
A sheet-shaped sheet heating element 6 is laid in a place within about [cm]. Then, the heat supplied from the sheet heating element 6 is stored.
By storing heat in the heat material 5 , it is possible to melt snow for a long time without supplying heat by natural light.

In this case, the above-mentioned sheet heating element 6 is a sheet heating element 6 having an extremely thin structure having a thickness of several [mm] or 1 [mm] or less. The planar heating element 6 can overcome the economical and construction obstacles of the conventional pipe laying, and the strength as a part of the pavement is also sufficiently satisfied.

Specific examples of the planar heating element 6 include those using sericite (sericite) as a main raw material and nickel as a conductive filler, and those having a carbon property.
The sheet heating element 6 is used as the surface layer asphalt mixture 4
You may make it lay in the layer of. Further, an insulating heating wire or the like can be used as a heating element instead of the planar heating element 6.

A road surface having a cross section as shown in FIG. 3 was used as a test piece, and after the surface temperature of the test piece was set to 10 [° C.], the heat storage material 5 was placed in a temperature-controlled room of −2 [° C.]. The time course of the surface temperature was recorded and the snowmelt condition of the snow scattered on the surface of the specimen was observed. At this time, the sheet-like planar heating element 6 was laid on the lower surface (about 5 [cm] from the surface) of the test piece, and a heat quantity of 400 [W / m ² ] was continuously applied for 1 hour. Further, for the purpose of simultaneous comparison, an asphalt mixture using hard sandstone that is usually used as an aggregate was prepared, and observation was performed under the same conditions except that the planar heating element 6 was not used.

FIG. 4 is a diagram showing changes over time in the surface temperature of the specimen containing the heat storage material and using the sheet heating element and the specimen without the heat storage material and using the sheet heating element. As shown in FIG. 4, the test piece constructed according to the present invention can maintain a surface temperature at which a sufficient snow melting effect can be obtained even after 5 hours or more, and further, the surface temperature can be rapidly lowered. Although it could be suppressed, the snowmelt effect was completely lost in the specimen constructed by the conventional method after about two and a half hours. That is, as shown in FIG. 4, the effect of heat storage and its maintenance were clearly confirmed by the present invention, and the difference in snow melting was also significantly confirmed.

That is, in the prior art such as road heating that does not use the heat storage material 5, it is necessary to constantly supply heat during snowfall, whereas in the present invention, the heat that is temporarily supplied is heat storage. Since the heat is maintained for a long time, it can be realized at an extremely low cost by effectively utilizing night power.

Although the road surface construction method of the present invention and the paved road using the heat storage material have been described above, a concrete-based mixture or a resin-based mixture may be used instead of the surface layer asphalt mixture 4 which is the paving material used for the surface layer. .

Further, instead of spraying the ceramic heat storage material 5 on the surface of the surface asphalt mixture 4 which is the paving material used for the surface and finishing the surface by rolling the roller, asphalt, concrete or You may use what knead | mixed the heat storage material 5 with the resin type mixture as a paving material used for a road surface layer.

As the paving material used for the surface layer, 10
It is also very effective to use a mixture of asphalt-based, concrete-based or resin-based, which has so-called water permeability or drainage property, having voids of [%] or more.

As described above, when the paving material used for the surface layer is a mixture of water-permeable or drainable asphalt, concrete or resin, water is accumulated on the road surface due to the water permeating through the voids due to snow melting. Therefore, walking and running safety is improved. In other words, the slip resistance increases due to the voids, and water does not collect on the road surface due to the voids, so that the snow melting effect becomes more effective. Therefore, the combination of the mixture and the heat storage material has not been found in the conventional snow melting technique and can be said to be an extremely effective means.

In the secondary product, which is a building material such as a block, part or all of the aggregate can be used as the heat storage material. That is, in the present invention, by using a heat storage material having heat storage characteristics,
The effective snow melting as described above can be performed.

[0045]

As described above, according to the road surface construction method, the paved road using the heat storage material, and the building material using the heat storage material of the present invention, sufficient strength as a pavement aggregate without phase change is obtained. Since the used ceramic heat storage material is used as all or part of the aggregate of the pavement or building material that becomes the pavement material, it is not necessary to pipe inside the container for storing the heat storage material or inside the pavement as in the past, and it is economical. The workability was improved and the snow melting effect became excellent.

Further, according to the road surface construction method using the sheet heating element and the paved road using the heat storage material of the present invention, since the sheet heating element is installed in the surface layer or on the lower surface, thermal efficiency during snow melting Has been dramatically improved, and as a construction method thereof, since the sheet heating element is simply installed in the surface layer or on the lower surface, the workability is extremely excellent.

[Brief description of drawings]

FIG. 1 is a diagram showing a cross section of a paved road using a heat storage material constructed by a construction method of the present invention.

FIG. 2 is a diagram showing changes over time in the surface temperature of a heat storage material-mixed specimen and a heat storage material-non-mixed specimen.

FIG. 3 is a diagram showing a cross section of a paved road using a heat storage material constructed by the construction method of the present invention.

FIG. 4 is a diagram showing changes over time in the surface temperature of a sample containing a heat storage material and using a planar heating element and a sample without a heat storage material mixed with a sheet heating element.

[Explanation of symbols]

1 subgrade soil 2 crushed stone 3 base layer asphalt mixture 4 Surface layer asphalt mixture 5 Heat storage material 6 Sheet heating element

Continued front page       (56) References JP-A-9-184105 (JP, A)                 JP-A-11-269807 (JP, A)                 JP-A-11-222803 (JP, A)                 JP-A-9-272860 (JP, A)                 JP-A-11-209747 (JP, A)                 JP-A-11-303007 (JP, A)                 Actual Kaihei 7-31341 (JP, U)

Claims (10)

(57) [Claims] 1. A road paving, the surface of the asphalt mixture is its surface, sprayed with the heat storage material of the ceramic <br/> click scan system having a predetermined particle size as aggregate predetermined percentage, the ceramics A road surface construction method, comprising: compacting and finishing the surface of the asphalt mixture to which the heat storage material of the system is sprinkled. 2. A road paving, the asphalt mixture is its surface layer part or all kneading heat storage material and the aggregate of ceramics based, in the asphalt mixture heat storage material is kneaded in the ceramic A road surface construction method, characterized in that the surface of the pavement is finished to a specified thickness. 3. The road surface construction method according to claim 1, wherein when the surface layer of the road surface pavement is formed with the asphalt mixture, a heating element is installed in a layer or a lower surface of the asphalt mixture. . 4. The road surface construction method according to claim 1, wherein a concrete mixture or a resin mixture is used instead of the asphalt mixture. Wherein said asphalt mixture, said concrete mixture or the resin mixture, water permeability of the asphalt mixture, 4 What claim 1, characterized in that the permeability of concrete mixture or water permeability of the resin mixture
Road construction method according to any Re. 6. A part of the aggregate contained in the paving materials used for the surface layer or pavement, characterized in that the heat storage material of ceramics based whole. 7. A pavement according to claim 6, characterized in that installed a heating element in the layer or the lower surface of the pavement of ceramics system used in the surface layer. 8. A paving material of ceramics system used for the surface layer, water-permeable asphalt mixture pavement according to claim 6 or 7, wherein the water permeable concrete mixture or water permeability of the resin mixture . 9. building materials, characterized in that some or all of the aggregate contained in the composition was heat storage material of the ceramics system. 10. The building material according to claim 9, which has a water permeable function.