JP2007132055A - Low-noise elastic paving body and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-noise elastic paving body and its construction method having good durability of a noise reducing effect and excelling in cost compared with conventional rubber chip pavement. <P>SOLUTION: A paving body laid on an existing paving body 10 is the low-noise elastic paving body 1 containing a sealing material as a main component and including hard aggregate. The thickness is preferably 5-10 mm. One kind selected out of a group of silicone-based, urethane-based, polysulfide-based and polyisobutylene-based sealing materials can be suitably used as the sealing material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a low-noise elastic pavement (hereinafter also simply referred to as “pavement”) and a construction method thereof, and more particularly, a low-noise elastic pavement that is highly durable and excellent in noise reduction effect and a construction method thereof. About.

  In recent years, in place of conventional dense pavement, drainage pavement that reduces traffic noise by providing a gap inside the pavement is rapidly spreading. According to this drainage pavement, it is possible to reduce the noise by about 3 dB compared to the conventional one, but since there are many areas where this drainage pavement does not provide sufficient noise reduction, further noise reduction is possible. Technology is required.

  As a technology for this, for example, a soundproof wall has been proposed, but this has problems such as increased construction costs and places that cannot be installed due to landscape problems, so the road paving itself With regard to the improvement of the above, a technique capable of realizing a lower noise is desired. Therefore, as a pavement that can realize superior low noise performance over drainage pavement, by using rubber as an elastic aggregate, we attempted to reduce noise by utilizing the void inside the pavement and the elasticity of rubber. Various proposals have been made for so-called rubber chip elastic pavement.

For example, Patent Documents 1 and 2 describe the improved techniques related to the drainage pavement and the rubber chip elastic pavement.
Japanese Patent Laying-Open No. 2005-016151 (Claims etc.) JP-A-2004-137893 (Claims, [0009], etc.)

  However, both the drainage pavement and the rubber chip elastic pavement have a problem that the noise reduction effect is not exhibited unless the thickness is about 20 to 50 mm due to the mechanism of utilizing the gap. Therefore, among drainage pavements among the above low-noise pavements, although noise reduction effect at the initial stage of construction is recognized, if the voids inside the pavement are clogged with use, the noise reduction effect is drastically reduced and is comparable to normal pavement There was a problem of becoming a state. Moreover, in the rubber chip elastic pavement, since the elastic action of rubber is also used, the noise reduction effect lasts longer than that of the drainage pavement. However, the effect is reduced by half when the gap is clogged. Further, the rubber chip elastic pavement is very expensive because an elastic material such as urethane is used as a binder, and there is a problem that the application range is limited.

  Accordingly, an object of the present invention is to provide a low-noise elastic pavement that eliminates the above-described problems, is excellent in sustainability of noise reduction effect, and is superior in cost as compared with conventional rubber chip pavements, and a method for constructing the same. is there.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have achieved the following configuration, which is low in cost compared to conventional rubber chip pavement and excellent in noise reduction effect sustainability. The inventors have found that an elastic pavement can be obtained and have completed the present invention.

  That is, the low-noise elastic pavement of the present invention is a pavement laid on an existing pavement, and is characterized by including a sealing material as a main component and a hard aggregate.

  The thickness of the paving body of the present invention is preferably 5 to 10 mm. Further, as the sealing material, any one selected from the group consisting of silicone, urethane, polysulfide, and polyisobutylene can be suitably used. Furthermore, in the pavement of the present invention, it is preferable that 3 to 50 parts by weight of the hard aggregate is included with respect to 100 parts by weight of the sealing material. Furthermore, the pavement of the present invention can further contain an elastic aggregate, and the pavement of the present invention is preferably laid on the existing pavement via a primer layer.

  Moreover, the construction method of the low noise elastic pavement of the present invention is characterized in that the surface of the existing pavement is polished in advance when the low noise elastic pavement of the present invention is constructed.

  According to the present invention, it is possible to realize a low-noise elastic pavement and a construction method thereof that are excellent in sustainability of noise reduction effect and superior in cost as compared with conventional rubber chip pavements because of the above configuration. it can.

Hereinafter, preferred embodiments of the present invention will be described in detail.
FIG. 1 shows a schematic partial cross-sectional view of a state in which the low-noise elastic pavement of the present invention is laid. As shown in the figure, the low noise elastic pavement 1 of the present invention is used by being laid on an existing pavement 10.

  The pavement of the present invention is mainly composed of a sealing material and includes hard aggregate. By making a mixture of hard sealant mainly composed of flexible sealing material and laying it on the existing pavement 10, it is excellent in noise reduction effect even in thin layers of about 5 to 10 mm in thickness. Moreover, it has become possible to realize a low-noise elastic pavement excellent in durability. That is, the pavement according to the present invention basically reduces the sound generated between the tire and the road surface by utilizing the elasticity of the pavement itself, thereby providing excellent sustainability of the noise reduction effect. In addition, it is excellent in cost because it is a thin layer and does not use an expensive material such as a urethane binder.

  As the sealing material in the present invention, a silicone system, a urethane system, a polysulfide system, a polyisobutylene system, or the like can be used, which may be a one-component curable type or a two-component curable type. Among these, urethane-based sealing materials are preferable because they are rich in elasticity and excellent in stretch absorbability, and can form a sealing material layer with good wear resistance and durability.

  Moreover, there is no restriction | limiting in particular as a hard aggregate, Recycled aggregates, such as natural aggregates, such as river gravel and river sand, and crushed stone, slag, concrete, glass, FRP, can be used. The stone, sand, etc. used for the hard aggregate are intended to ensure the strength and wear resistance of the completed pavement and to be exposed on the surface to obtain an anti-slip effect. The stone materials preferably have a function of meshing with each other to disperse the load. For this reason, a sharp object such as a crushed stone is suitable. Further, it is preferable to mix 5% by volume or more of fine aggregate having a particle size of 0.5 mm or less with respect to coarse aggregate having a particle size of 0.5 to 10 mm. The fine-grained aggregate provides an anti-slip action (polishing effect like sandpaper) on a tire or the like. In addition, as a hard aggregate, it is preferable to use what was surface-treated with silane coupling agents, such as aminosilane and an epoxy silane, for durability improvement.

  In the pavement of the present invention, it is preferable that 3 to 50 parts by weight, particularly 5 to 30 parts by weight of hard aggregate is included with respect to 100 parts by weight of the sealing material. If the ratio of the hard aggregate is less than this range, the strength is not sufficient. On the other hand, if the ratio is too large, sufficient elasticity and noise reduction effect cannot be obtained, which is not preferable.

  The pavement of the present invention can further be used by adding an elastic aggregate. As the elastic aggregate, rubber chips and rubber powder can be used, and the material is not particularly limited, and natural rubber, isoprene rubber, styrene-butadiene rubber, butyl rubber, ethylene-propylene rubber, and the like can be used. . Such rubber can be obtained from used waste materials such as rubber tires, weather strips, hoses, etc., unnecessary end materials generated during molding, molding defects, and the like. The ratio of the elastic aggregate in the paving body of the present invention is about 30 parts by weight or less with respect to 100 parts by weight of the sealing material. If this ratio is too large, the ratio of the sealing material is lowered and the strength is reduced, which is not preferable.

  Moreover, it does not restrict | limit especially as an existing pavement which can apply the pavement of this invention, A general asphalt pavement, concrete pavement, etc. are mentioned.

  The pavement of the present invention lays a mixture obtained by appropriately mixing the above-mentioned sealing material, hard aggregate and, if necessary, elastic aggregate with a stirrer or the like with a thickness of about 5 to 10 mm on the existing pavement, It can be hardened and cured and integrated with the existing pavement, and is preferably laid on the existing pavement 10 via the primer layer 2 as shown in the figure. By applying a primer treatment between the existing pavement 10 and the existing pavement 10 and the pavement 1 of the present invention can be more firmly bonded. There is no restriction | limiting in particular about the kind of primer to be used, Conventional things, such as a urethane primer and an epoxy primer, can be used.

  In the present invention, it is preferable to polish the surface of the existing pavement 10 in advance before the pavement 1 is laid. Adhesion between the existing pavement 10 and the pavement 1 of the present invention can be further strengthened by performing primer treatment after surface polishing and then laying the pavement of the present invention.

  Furthermore, in the present invention, the pavement 1 prepared in the form of a sheet in advance may be laid on the existing pavement 10 via the primer layer 2, and in this case also, the pavement firmly bonded to the existing pavement 10 1 can be formed.

Hereinafter, the present invention will be described in more detail with reference to examples.
(Example)
A mixture based on 5 parts by weight of No. 3 silica sand, 5 parts by weight of No. 5 silica sand, and 5 parts by weight of No. 7 silica sand is prepared with respect to 100 parts by weight of the two-component mixed urethane sealant, and a stirrer such as a concrete mixer is used. Mixed to obtain an uncured mixture.

  Concrete pavement was selected as the existing pavement 10 to be the foundation, and the roughness was adjusted by polishing the fragile layer on the surface. Next, a urethane primer was applied to the polished concrete pavement surface to perform surface treatment.

Next, the uncured mixture was uniformly applied on the urethane primer layer 2 to a thickness of about 7 mm using a plastering iron or a spatula. After construction, it was integrated with asphalt pavement by curing and curing. In addition, when the mixture was uncured, about 100 g / m ² of non-slip silica sand No. 6 was sprayed on the surface.

  As a result of measuring traffic noise in the thin-layer low-noise elastic pavement 1 thus constructed, a noise reduction effect of −5 dB was confirmed as compared with a normal dense-graded asphalt pavement.

It is a general | schematic fragmentary sectional view which shows the low noise elastic pavement which concerns on one embodiment of this invention.

Explanation of symbols

1 Low noise elastic pavement 2 Primer layer 10 Existing pavement

Claims (7)

  A low-noise elastic pavement that is a pavement laid on an existing pavement, comprising a sealing material as a main component and a hard aggregate.   The low-noise elastic pavement according to claim 1, having a thickness of 5 to 10 mm.   The low-noise elastic pavement according to claim 1 or 2, wherein the sealing material is any one selected from the group consisting of silicone, urethane, polysulfide, and polyisobutylene.   The low noise elastic pavement according to any one of claims 1 to 3, comprising 3 to 50 parts by weight of the hard aggregate with respect to 100 parts by weight of the sealing material.   Furthermore, the low noise elastic pavement as described in any one of Claims 1-4 containing an elastic aggregate.   The low-noise elastic pavement according to any one of claims 1 to 5, which is laid on the existing pavement via a primer layer.   A construction method for a low-noise elastic pavement comprising polishing the surface of the existing pavement in advance when constructing the low-noise elastic pavement according to any one of claims 1 to 6.

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