JP2003074007A - Elastic pavement, and method for the same pavement - Google Patents
Elastic pavement, and method for the same pavementInfo
- Publication number
- JP2003074007A JP2003074007A JP2001262682A JP2001262682A JP2003074007A JP 2003074007 A JP2003074007 A JP 2003074007A JP 2001262682 A JP2001262682 A JP 2001262682A JP 2001262682 A JP2001262682 A JP 2001262682A JP 2003074007 A JP2003074007 A JP 2003074007A
- Authority
- JP
- Japan
- Prior art keywords
- aggregate
- binder
- elastic pavement
- pavement
- soft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Road Paving Structures (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、安全性に優れ、歩
行感などの人間の感性にも良好なファイバー状ゴムから
なる軟質骨材を使った現場施工方式の弾性舗装体および
その舗装方法に関する。本発明の弾性舗装体は、広範囲
わたり、しかも湿潤時の滑りにくさが求められる車道に
好適である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-site construction pavement using a soft aggregate made of fibrous rubber which is excellent in safety and has good human sensation such as walking sensation and a pavement method thereof. . INDUSTRIAL APPLICABILITY The elastic pavement of the present invention is suitable for a roadway that requires a wide range and is difficult to slip when wet.
【0002】[0002]
【従来の技術】弾性舗装体は、ゴムなどの軟質骨材とバ
インダーとを主成分とする弾性舗装材を下地上に敷設し
たものからなり、その構造は骨材間に空隙を有する多孔
質構造である。したがって、この種の弾性舗装体は歩行
感の良さや転倒時に対する高い安全性が得られるととも
に、排水性を有するため、屋外で使用しても雨などによ
って水たまりができにくい。2. Description of the Related Art An elastic pavement is constructed by laying an elastic pavement material containing a soft aggregate such as rubber and a binder as a main component on a base, and its structure is a porous structure having voids between the aggregates. Is. Therefore, this kind of elastic pavement provides a good walking feeling and a high level of safety when it falls, and also has drainage properties, so that it is difficult for puddles to form due to rain even when used outdoors.
【0003】また、最近では様々な研究成果の一つとし
て、弾性舗装材の弾力性と多孔質性とにより、車輌走行
時の騒音が低減されるという報告がなされており、車道
用としての実用化も間近い段階に来ている。Recently, as one of various research results, it has been reported that the elasticity and the porosity of the elastic pavement material reduce the noise during the running of the vehicle, which is practically used for the road. The conversion is coming to an end.
【0004】弾性舗装体の施工方法は、プレキャスト方
式と現場施工方式の2通りに大別される。前者、すなわ
ちプレキャスト方式は、あらかじめ工場などで作製され
たブロック状やパネル状の弾性舗装体を施工現場に運び
入れて、接着材を介しての貼り付けや置き敷きによって
下地上に敷設する方法である。The construction method of the elastic pavement is roughly classified into a precast method and an on-site construction method. The former, that is, the precast method, is a method in which a block-shaped or panel-shaped elastic pavement made in advance at a factory is brought to the construction site and laid on the ground by pasting or laying with an adhesive. is there.
【0005】プレキャスト方式は、まず第1に同一条件
下で舗装体を作製することができ、平坦性や透水性など
の各種物性値が均一に管理できる。第2に、既に硬化済
みの状態であるため、接着材を介する場合でもその硬化
時間さえ待てば、すぐに使用できる。In the precast method, firstly, a pavement can be manufactured under the same conditions, and various physical property values such as flatness and water permeability can be uniformly controlled. Secondly, since it is already cured, it can be used immediately even if the curing time is waited for even through an adhesive.
【0006】これに対し、後者の現場施工方式は全ての
作業を現場にて行う方法である。すなわち、少なくとも
軟質骨材とバインダーとを現場にて混合・攪拌し、下地
上に打設した後、施工面を仕上げる。この現場施工方式
は、一度に施工できる面積が大きく、スキージなどで均
すことにより、ある程度の平坦面が得られる。On the other hand, the latter on-site construction method is a method of performing all the work on site. That is, at least the soft aggregate and the binder are mixed and stirred on site, placed on the ground, and then the construction surface is finished. This on-site construction method has a large area that can be constructed at one time, and a flat surface can be obtained to some extent by leveling with a squeegee or the like.
【0007】ところで、弾性舗装体の軟質骨材としてフ
ァイバー状ゴム(例えば、幅1〜5mm、長さ2〜40
mm程度で、別名ひじきゴム、撚糸ゴムとも言う。)を
用いることにより、湿潤時における弾性舗装体表面の耐
摩耗性を大幅に向上させることができる。また、ファイ
バー状ゴムをプレキャスト時のプレス圧を制御すること
で、低騒音性と排水性とを両立できるといった事例もあ
る。By the way, as a soft aggregate of the elastic pavement, fiber rubber (for example, width 1 to 5 mm, length 2 to 40)
It is also known as hijiki rubber or twisted rubber with a thickness of about mm. By using (1), it is possible to significantly improve the wear resistance of the surface of the elastic pavement when wet. There are also cases in which low noise and drainage can be achieved at the same time by controlling the press pressure during precasting of fibrous rubber.
【0008】[0008]
【発明が解決しようとする課題】しかしながら、プレキ
ャスト方式には次のような欠点が存在する。すなわち、
第1に、各ブロック体(プレス版)毎に継ぎ目が生じる
ため、継ぎ目処理が必要であり、また熱に起因する伸縮
により隙間や段差が生ずる。However, the precast method has the following drawbacks. That is,
First, since a seam is generated in each block body (press plate), a seam treatment is necessary, and a gap or a step is generated due to expansion and contraction due to heat.
【0009】第2に、下地がきわめて平坦でないと表面
がガタガタになり、事実上路面として使用できない。し
たがって、敷設される下地面も高精度の平坦性が要求さ
れるため、実際問題として、一度の施工単位が数kmと
長く、カーブやアップダウンといった複雑な地形を有す
る車輌走行路には不適である。このようなことから、車
輌走行路用としての弾性舗装体は、一度の施工面積が広
くとれ、しかも地形に応じて舗装できる現場施工方式に
ならざるを得ない。Secondly, if the groundwork is not extremely flat, the surface becomes rattling and cannot be used as a road surface in practice. Therefore, the ground surface to be laid is also required to have high-precision flatness, and as a practical matter, a single construction unit is as long as several kilometers, which is unsuitable for vehicle running roads with complicated terrain such as curves and ups and downs. is there. For this reason, the elastic pavement for a vehicle running road must be a field construction method that can take a large construction area at one time and can be paved according to the topography.
【0010】しかしながら、ファイバー状ゴムを弾性骨
材として現場でバインダーと混合して施工するには、次
のような問題が生ずる。すなわち、ファイバー状ゴム
は、形状がひじきのようにいびつで複雑であるため、バ
インダーとの混合・攪拌が難しく混合状態が不均一とな
る。そのため、下地面上に上手く広がらず、たとえスキ
ージなどで均したとしても、平坦かつ均一な路面を得る
ことが困難である。However, when the fibrous rubber is mixed as an elastic aggregate with a binder on site, the following problems occur. That is, since the fibrous rubber has a complicated shape such as Hijiki, which is difficult to mix and stir with the binder, the mixed state becomes non-uniform. Therefore, it does not spread well on the ground surface, and it is difficult to obtain a flat and uniform road surface even if it is leveled with a squeegee or the like.
【0011】そこで、本発明者は、軟質骨材にファイバ
ー状ゴムを用いた場合であっても、骨材の形状、材質お
よび配合比や、使用するバインダーの粘度を選定するこ
とにより、現場施工方式にて平坦かつ均一な表面を有す
る弾性舗装体を構築し得ることを見出した。Therefore, the inventor of the present invention has found that even when fiber rubber is used as the soft aggregate, it can be applied on site by selecting the shape, material and blending ratio of the aggregate and the viscosity of the binder to be used. It has been found that the method can build elastic pavement with a flat and uniform surface.
【0012】[0012]
【課題を解決するための手段】すなわち、本発明は、軟
質骨材と硬質骨材とからなり、過半量(50重体積%以
上)がファイバー状ゴムによって占められた骨材を施工
現場でバインダーと混合し、所定の下地上に打設して構
築される弾性舗装体において、モース硬度が7以上であ
り、かつ、平均粒径が1000μm以下の硬質骨材が上
記軟質骨材100重量%に対して5重量%以上含まれて
いることを特徴としている。上記硬質骨材の好ましい平
均粒径は、150〜800μmである。That is, according to the present invention, an aggregate composed of a soft aggregate and a hard aggregate, and a majority amount (50% by weight or more) of the fiber rubber is used as a binder at a construction site. In an elastic pavement constructed by being mixed with and being cast on a predetermined lower ground, the hard aggregate having a Mohs hardness of 7 or more and an average particle diameter of 1000 μm or less is 100% by weight of the soft aggregate. On the other hand, it is characterized by containing 5% by weight or more. The preferred average particle size of the hard aggregate is 150 to 800 μm.
【0013】これによれば、硬質骨材がファイバー状ゴ
ム(軟質骨材)の間に入り込んで、いわゆる「コロ」の
ような円滑材的機能を果たすことにより、現場施工での
バインダーとの混合性および攪拌性が格段に向上する。
さらには、打設時の敷き均し性や平坦性も向上する。According to this, the hard aggregate enters between the fibrous rubber (soft aggregate) and performs a smooth material function like a so-called "roller", so that it is mixed with the binder in the field construction. Property and stirring property are remarkably improved.
Furthermore, the leveling property and flatness at the time of placing are also improved.
【0014】本発明でいう「平均粒径」とは、骨材粒子
をメッシュ篩で篩い分けするときの篩目の平均値で、か
つ、それら骨材の粒径のバラツキをヒストグラム化した
ときに、最も多く計測される粒径である。また、下地と
は、本発明の弾性舗装体の被施工面で、一様に平坦であ
ることが好ましい。The "average particle size" in the present invention is the average value of the mesh size when the aggregate particles are sieved with a mesh sieve, and when the variation in the particle size of the aggregates is made into a histogram. , The most frequently measured particle size. In addition, the base is a surface on which the elastic pavement of the present invention is applied, and it is preferable that the base is uniformly flat.
【0015】また、上記硬質骨材は無機系材料であり、
上記バインダーの粘度が1〜8Pa・s(1000〜8
000cps)であることにより、バインダーがムラな
く骨材間に入り込むことができ、均一な混合状態が得ら
れる。The hard aggregate is an inorganic material,
The binder has a viscosity of 1-8 Pa · s (1000-8
Since it is 000 cps), the binder can evenly enter between the aggregates and a uniform mixed state can be obtained.
【0016】すなわち、上記バインダーが1Ps・s
(1000cps)未満である場合は、粘度が低すぎ
て、打設後にバインダーが骨材間に捕捉されずに下地上
に垂れ流れてしまうことがある。逆に、8Pa・s(8
000cps)を越えると、粘度が高すぎてバインダー
自体が高い結合力を有することにより、骨材間に入り込
まず、均一に混ざり合わないおそれがある。That is, the binder is 1 Ps · s.
If it is less than (1000 cps), the viscosity may be too low, and the binder may droop and flow onto the substrate after being cast without being trapped between the aggregates. Conversely, 8 Pa · s (8
If it exceeds 000 cps), the viscosity is too high and the binder itself has a high binding force, so that the binder may not enter into the aggregates and may not be uniformly mixed.
【0017】また、上記骨材と上記バインダーとの配合
比率(重量)は、100:12〜100:35であるこ
とが好ましい。すなわち、配合比率が100:12未満
であると、施工は可能であるが、耐久性を上げるために
プレキャスト方式並のプレス圧を負荷しなくてはなら
ず、施工が面倒になる。逆に、配合比率が100:35
を越えると、バインダー量が多いため、舗装材の空隙率
が小さくなり、透水性が低くなる。また、場合によって
は、舗装体の表面に樹脂の硬化によって凹凸が生じるこ
とがあるので好ましくない。The blending ratio (weight) of the aggregate and the binder is preferably 100: 12 to 100: 35. That is, when the compounding ratio is less than 100: 12, the construction is possible, but in order to improve the durability, it is necessary to apply a pressing pressure equivalent to that of the precast method, which makes the construction troublesome. Conversely, the mixing ratio is 100: 35
When it exceeds, the porosity of the paving material becomes small and the water permeability becomes low because the amount of the binder is large. Further, in some cases, unevenness may occur on the surface of the pavement due to curing of the resin, which is not preferable.
【0018】本発明の弾性舗装体が車輌走行用路面とし
て、十分な負荷に耐え得るためには、上記バインダーの
硬化状態において、CS硬度計にて測定した表面の硬度
が60以上であることが好ましい。また、通常走行に比
べて大きな負荷荷重が加わる、トラックの走行やフォー
クリフトなどの切り返しなどを考慮した場合、上記硬度
は75以上となることがより好ましい。In order for the elastic pavement of the present invention to withstand a sufficient load as a road surface for running a vehicle, the surface hardness measured by a CS hardness meter in the cured state of the binder is 60 or more. preferable. Further, in consideration of traveling of a truck, turning back of a forklift, etc., in which a larger load is applied than in normal traveling, the hardness is more preferably 75 or more.
【0019】また、降雨時などのスリップの危険性をで
きるだけ小さくするためには、湿潤状態での60km/
h走行時における、DFテスタ(ダイナミック・フリク
ション・テスタ)にて測定した表面の動的摩擦係数が
0.4以上であることが好ましい。In order to minimize the risk of slipping during rain, etc., 60 km / wet in a wet state.
It is preferable that the dynamic friction coefficient of the surface measured by a DF tester (dynamic friction tester) is 0.4 or more during h running.
【0020】本発明には、上記弾性舗装体の舗装方法も
含まれる。すなわち、本発明の舗装方法は、ファイバー
状ゴムからなる軟質骨材が全体の50体積%以上を占め
る骨材に、モース硬度が7以上であり、かつ、平均粒径
が1000μm以下の硬質骨材を上記軟質骨材100重
量%に対して5重量%以上加えて、施工現場にてバイン
ダーとともに混合して得られた弾性舗装材を下地上に打
設する工程を含むことを特徴としている。The present invention also includes a paving method for the above elastic pavement. That is, the pavement method of the present invention is a hard aggregate having a Mohs hardness of 7 or more and an average particle diameter of 1000 μm or less in the aggregate in which the soft aggregate made of fiber rubber occupies 50% by volume or more of the whole. 5% by weight or more with respect to 100% by weight of the above soft aggregate, and a step of placing an elastic pavement material obtained by mixing with a binder at the construction site on the groundwork.
【0021】[0021]
【発明の実施の形態】次に、本発明の実施形態について
説明する。図1には、あらかじめ路盤1上に敷設された
下地2上に本発明の弾性舗装材3よりなる表層部30を
形成した弾性舗装体の模式的断面図が示されている。な
お、図面上は下地2および表層部30は、バインダーが
一様に充填されているように見えるが、実際には、各骨
材間には空隙が設けられており、少なくとも表層部30
は透水性を有している。BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. FIG. 1 shows a schematic cross-sectional view of an elastic pavement in which a surface layer portion 30 made of the elastic pavement material 3 of the present invention is formed on a base material 2 laid on the roadbed 1 in advance. In the drawing, the base 2 and the surface layer portion 30 seem to be uniformly filled with the binder, but in reality, there are voids between the aggregates and at least the surface layer portion 30.
Has water permeability.
【0022】下地2は、例えばアスファルト/コンクリ
ート、砕石、モルタル、半たわみ舗装、簡易安定化処理
面などであってよく、必ずしも高度に安定化された処理
面である必要はないが、一様に安定化された面であるこ
とが好ましい。なお、下地2については、表層部30が
弾性舗装材3であることから、繰り返しの荷重に対して
撓まないように空隙をできるだけ少なくして高強度化を
図ってもよい。The base 2 may be, for example, asphalt / concrete, crushed stone, mortar, semi-flexible pavement, simple stabilizing treatment surface, and the like, and does not necessarily have to be a highly stabilized treatment surface, but is uniform. It is preferably a stabilized surface. Since the surface layer portion 30 of the foundation 2 is the elastic pavement material 3, the voids may be reduced as much as possible so as to increase the strength so as not to bend under repeated loads.
【0023】この実施形態において、路盤1上には、あ
らかじめ下地2が設けられているが、上述したように表
層部30の敷設面が一様に安定化された面であれば、下
地2を設けずに路盤1上に表層部30を直接施工しても
よい。In this embodiment, the base 2 is provided on the roadbed 1 in advance. However, if the laying surface of the surface layer portion 30 is a uniformly stabilized surface as described above, the base 2 is used. The surface layer portion 30 may be directly constructed on the roadbed 1 without being provided.
【0024】また、表層部30との接合面での剥がれを
防止するため、下地2にプライマーを施してもよい。プ
ライマーとしては、例えばウレタンやエポキシなどの未
硬化を塗布し、それらが完全に硬化する前に表層部30
を施工することが好ましい。A primer may be applied to the underlayer 2 in order to prevent peeling at the joint surface with the surface layer portion 30. As the primer, for example, uncured urethane or epoxy is applied, and the surface layer portion 30 is applied before they are completely cured.
Is preferably constructed.
【0025】弾性舗装材3には、ファイバー状ゴム(別
名:ひじきゴムまたは撚糸ゴム)からなる軟質骨材31
と、モース硬度が7以上であり、かつ、平均粒径が10
00μm以下の硬質骨材32とが含まれ、これら各骨材
がバインダーによって結合されている。この実施形態に
おいて、軟質骨材31は、骨材全体の過半量(50体積
%以上)を占め、硬質骨材32は軟質骨材100重量%
に対して5重量%以上を占める。The elastic paving material 3 is made of a soft aggregate 31 made of fiber rubber (also known as hijiki rubber or twisted rubber).
And the Mohs hardness is 7 or more, and the average particle size is 10
The hard aggregate 32 having a size of 00 μm or less is included, and these aggregates are bonded by a binder. In this embodiment, the soft aggregate 31 occupies a majority amount (50% by volume or more) of the whole aggregate, and the hard aggregate 32 is 100% by weight of the soft aggregate.
To 5% by weight or more.
【0026】軟質骨材31としては、天然ゴム、SB
R、NBR、EDPM、BR、CRなどの各種ゴム材料
の単体物もしくは混合物、またはこれらゴム材料で被覆
された骨材、ウレタンなどの各種エラストマーなど基本
的にゴム弾性を有するものであれば適用可能である。As the soft aggregate 31, natural rubber, SB
Applicable as long as it has basically rubber elasticity such as a single substance or a mixture of various rubber materials such as R, NBR, EDPM, BR and CR, or an aggregate covered with these rubber materials, various elastomers such as urethane, etc. Is.
【0027】軟質骨材31は、新規に製造されたもので
あってもよいし、再生品や廃材などを用いてもよい。形
状は、上述したようにファイバー状に形成されていれば
よく、粒径やアスペクト比は施工面の仕様によって適宜
選択できる。The soft aggregate 31 may be a newly manufactured one, or may be a recycled product or a waste material. As long as the shape is fiber-like as described above, the particle size and the aspect ratio can be appropriately selected according to the specifications of the construction surface.
【0028】また、軟質骨材31として別途用意した粒
状のチップゴムをさらに添加してもよく、これによれ
ば、材料の混合性がより向上する。Further, a granular chip rubber prepared separately as the soft aggregate 31 may be further added, which further improves the mixing property of the materials.
【0029】硬質骨材32は、上述したモース硬度が7
以上であり、かつ、平均粒径が1000μm以下の条件
を満足する、例えば石、砂、粘土、金属粉または各種セ
ラミックス類などの無機系材料が好適であるが、より好
ましい平均粒径は150〜800μmである。The hard aggregate 32 has the above-mentioned Mohs hardness of 7
Inorganic materials such as stones, sands, clays, metal powders and various ceramics, which satisfy the above conditions and have an average particle diameter of 1000 μm or less, are preferable, but a more preferable average particle diameter is 150 to It is 800 μm.
【0030】軟質骨材31と硬質骨材32の配合比率
は、硬質骨材32が軟質骨材31(100重量%)に対
して5重量%以上含まれていればよいが、より好ましい
態様としては、硬質骨材32の平均粒径が150μmの
ときの混合下限は、重量比で軟質骨材:硬質骨材=10
0:8である。逆に、平均粒径が1000μmのときの
混合上限は、重量比で軟質骨材:硬質骨材=100:4
0である。The mixing ratio of the soft aggregate 31 and the hard aggregate 32 may be 5% by weight or more of the hard aggregate 32 (100% by weight) with respect to the soft aggregate 31 (a more preferable embodiment). When the average particle diameter of the hard aggregate 32 is 150 μm, the lower limit of mixing is, by weight ratio, soft aggregate: hard aggregate = 10.
It is 0: 8. On the contrary, when the average particle size is 1000 μm, the upper limit of mixing is soft aggregate: hard aggregate = 100: 4 by weight ratio.
It is 0.
【0031】本発明において、軟質骨材32の平均粒径
に特に下限はないが、例えば平均粒径が30μmでも使
用可能であり、この場合の配合重量比は軟質骨材:硬質
骨材=100:5とすればよい。さらには、平均粒径が
30μm未満でもよく、バインダーの粘度を小さくする
などの調整を行うことにより、例えば1μmでもある程
度の効果は得られる。In the present invention, there is no particular lower limit to the average particle size of the soft aggregate 32, but it is also possible to use, for example, an average particle size of 30 μm. In this case, the compounding weight ratio is soft aggregate: hard aggregate = 100. : 5 should be set. Further, the average particle size may be less than 30 μm, and by adjusting the viscosity of the binder to be small, for example, even with 1 μm, some effect can be obtained.
【0032】しかしながら、硬質骨材32の粒径が10
00μmを極端に越えると、混合状態にムラができやす
く、均一な路面が得られにくい。However, the particle size of the hard aggregate 32 is 10
If it is extremely larger than 00 μm, the mixed state tends to be uneven, and it is difficult to obtain a uniform road surface.
【0033】バインダーには、好ましくは樹脂系のバイ
ンダーが用いられる。例えば、一液ウレタン、二液ウレ
タン、エポキシ樹脂、アクリル樹脂、または各種エマル
ジョンなどが使用可能である。As the binder, a resin binder is preferably used. For example, one-component urethane, two-component urethane, epoxy resin, acrylic resin, or various emulsions can be used.
【0034】バインダーの粘度は、1〜8Pa・s(1
000〜8000cps)の範囲を満足しているものが
好ましい。すなわち、バインダーが1Pa・s(100
0cps)未満である場合は、粘度が低すぎて、打設後
にバインダーが骨材間に捕捉されずに下地上に垂れ流れ
てしまうことがある。逆に、8Pa・s(8000cp
s)を越えると、粘度が高すぎて、バインダー自体が高
い結合力を有することにより、骨材間に入り込まず、均
一に混ざり合わないおそれがあるので好ましくない。The viscosity of the binder is 1 to 8 Pa · s (1
000 to 8000 cps) is preferable. That is, when the binder is 1 Pa · s (100
If it is less than 0 cps), the viscosity may be too low, and the binder may not be trapped between the aggregates after casting and may flow down onto the substrate. Conversely, 8 Pa · s (8000 cp
If it exceeds s), the viscosity is too high and the binder itself has a high binding force, so that it may not enter into the aggregates and may not be uniformly mixed, which is not preferable.
【0035】この実施形態において、弾性舗装材3は、
主に骨材とバインダーとを主成分として構成されている
が、これ以外に、有機無機の繊維や樹脂片、顔料などを
適宜添加してもよいし、各種溶剤や酸化防止剤、耐候性
剤などの添加剤、または鉛系やスズ系の触媒を添加して
もよく、構築される弾性舗装体3の仕様によって適宜選
択できる。In this embodiment, the elastic paving material 3 is
It is mainly composed mainly of an aggregate and a binder, but in addition to this, organic / inorganic fibers, resin pieces, pigments, etc. may be appropriately added, and various solvents, antioxidants, and weather resistance agents. Additives such as, or lead-based or tin-based catalysts may be added, and can be appropriately selected depending on the specifications of the elastic pavement 3 to be constructed.
【0036】骨材とバインダーとの配合比率(重量)
は、骨材:バインダー=100:12〜100:35の
範囲を満足するように配合される。すなわち、配合比率
が100:12未満であると、施工は可能であるが、耐
久性を上げるためにプレキャスト方式並のプレス圧を負
荷しなくてはならず、施工が面倒になる。逆に、配合比
率が100:35を越えると、バインダー量が多いた
め、舗装材の空隙率が小さくなり、透水性が低くなるこ
ともあるので好ましくない。Mixing ratio of aggregate and binder (weight)
Is blended so as to satisfy the range of aggregate: binder = 100: 12 to 100: 35. That is, when the compounding ratio is less than 100: 12, the construction is possible, but in order to improve the durability, it is necessary to apply a pressing pressure equivalent to that of the precast method, which makes the construction troublesome. On the other hand, if the mixing ratio exceeds 100: 35, the amount of the binder is large, so that the porosity of the paving material becomes small, and the water permeability may become low, which is not preferable.
【0037】次に、表層部30の形成方法について説明
する。本発明の施工方法は、施工現場で弾性舗装材3を
混合し、それを下地2上に供給して均した後に加圧す
る、いわゆる現場施工方式である。この現場施工方式に
よれば、路盤1や下地2の凹凸(不陸)や傾斜、カーブ
などにも迅速に対応可能である。Next, a method of forming the surface layer portion 30 will be described. The construction method of the present invention is a so-called on-site construction method in which the elastic pavement material 3 is mixed at the construction site, is supplied onto the base 2, is leveled, and then pressed. According to this on-site construction method, it is possible to promptly deal with unevenness (unevenness), slope, curve, etc. of the roadbed 1 and the foundation 2.
【0038】まず、軟質骨材31と硬質骨材32とを所
定の重量比で配合した骨材と、少なくともこの骨材を結
合するに足りるバインダーとを攪拌機に投入して、弾性
舗装材3を混合する。攪拌機は、エンジン式、モーター
式など問わず、いわゆるモルタルミキサのような攪拌容
器内で攪拌羽根を回して混合するものであってよい。First, the elastic pavement 3 is prepared by charging an aggregate prepared by mixing the soft aggregate 31 and the hard aggregate 32 in a predetermined weight ratio and at least a binder sufficient to bond the aggregates to the stirrer. Mix. The stirrer may be of an engine type or a motor type, and may be a stirrer such as a so-called mortar mixer in which stirring blades are rotated to mix.
【0039】次に、攪拌した弾性舗装材3を下地2上に
好ましくは一様に散布(供給)し、その表面を均して表
層部30を形成する(均し工程)。舗装材の散布施工機
としては、弾性舗装材の表面をすり取って表面を均一に
均すスキージを有する例えば住友ゴム社製ゴムチップ施
工機P700、P200などがある。なお、高精度な平
坦性が要求される場合には、スキージを下地2と平行に
往復動させることが好ましい。Next, the agitated elastic pavement material 3 is sprayed (supplied) onto the base 2 preferably uniformly, and the surface thereof is leveled to form the surface layer portion 30 (leveling step). Examples of the paving material spraying construction machine include rubber chip construction machines P700 and P200 manufactured by Sumitomo Rubber Co., Ltd., which have a squeegee that scrapes the surface of the elastic paving material to even the surface. When high-precision flatness is required, it is preferable to reciprocate the squeegee in parallel with the base 2.
【0040】次に、加圧工程として、均し工程で得られ
た表層部30を所定の加圧手段によって、均一な密度に
なるように加圧する。加圧手段としては、転圧ローラを
用いることが好ましい。なお、転圧作業はバインダーが
硬化する前であれば、必要に応じて何度でも行ってよ
い。Next, in the pressing step, the surface layer portion 30 obtained in the leveling step is pressed by a predetermined pressing means so as to have a uniform density. It is preferable to use a pressure roller as the pressing means. The rolling operation may be carried out as many times as necessary before the binder is hardened.
【0041】転圧ローラに代えて、所定の面圧に設定さ
れた押圧プレートを表層部30上に載置してもよい。ま
た場合によっては、加圧状態で回転円盤などを舗装面上
に接触させてもよい。なお、特に押圧プレートを用いる
場合には、バインダーの硬化前にそれを引きずると、表
層部30の一部がはぎ取られて凹凸ができることがある
ため注意を要する。Instead of the pressure roller, a pressing plate set to a predetermined surface pressure may be placed on the surface layer portion 30. In some cases, a rotating disk or the like may be brought into contact with the pavement surface under pressure. It should be noted that, particularly when a pressing plate is used, if the binder is dragged before being cured, a part of the surface layer portion 30 may be peeled off and unevenness may be formed, so be careful.
【0042】また、均し工程と加圧工程の間、もしく
は、加圧工程と同時に表層部30を加熱する加熱工程を
実施することにより、バインダーの硬化を促進させるこ
とができる。加熱ローラもしくは加熱押圧プレートを用
いることにより、加熱工程と加圧工程とを同時に実施す
ることができる。The curing of the binder can be promoted by performing a heating step of heating the surface layer portion 30 between the leveling step and the pressing step, or simultaneously with the pressing step. By using the heating roller or the heating pressing plate, the heating step and the pressing step can be performed at the same time.
【0043】このようにして得られた弾性舗装体が車輌
走行用路面として、十分な負荷に耐え得るためには、バ
インダーの硬化状態において、CS硬度計にて測定した
表面の硬度が60以上であることが好ましい。なお、硬
度が60未満の場合は、舗装面が柔らかいため、車輌の
姿勢が崩れて不安定になるなど走行性の面で問題が生ず
ることがある。In order for the elastic pavement thus obtained to withstand a sufficient load as a road surface for running a vehicle, the hardness of the surface measured by a CS hardness meter in the cured state of the binder is 60 or more. Preferably there is. If the hardness is less than 60, the pavement surface is soft and the vehicle may lose its posture and become unstable.
【0044】また、降雨時などのスリップの危険性をで
きるだけ小さくするためには、湿潤時60km/h走行
において、DFテスタ(ダイナミック・フリクション・
テスタ)にて測定した表面の動的摩擦係数が0.4以上
であることが好ましい。In order to minimize the risk of slippage during rain, etc., a DF tester (dynamic friction
The dynamic friction coefficient of the surface measured by a tester) is preferably 0.4 or more.
【0045】この実施形態において、表層部30は、現
場施工方式で構築されているが、プレキャスト方式によ
って構築されてもよい。すなわち、表層部30のみをあ
らかじめ工場等の現場外で製造しておき、それを施工現
場に運び込んで、下地2上に貼り付けや置き敷きなどに
よって敷設することも可能である。In this embodiment, the surface layer portion 30 is constructed by the on-site construction method, but it may be constructed by the precast method. That is, it is possible to manufacture only the surface layer portion 30 in advance outside the site such as a factory, bring it to the construction site, and lay it on the base 2 by pasting or laying it down.
【0046】[0046]
【実施例】次に、本発明の具体的な実施例について、比
較例とともに検討する。まず準備作業として、路盤上に
開粒アスファルトを所定厚さに敷き詰めて敷き均し、セ
メントミルクを流し込んで1週間経過した半たわみ性舗
装からなる下地を形成し、その表面を研磨などによって
レベル出しし、住友ゴム工業社製プライマーC918B
にてプライマー処理を行った。EXAMPLES Next, specific examples of the present invention will be examined together with comparative examples. First of all, as a preparatory work, open-grained asphalt is spread on a roadbed to a predetermined thickness and leveled, cement milk is poured in to form a base made of semi-flexible pavement for one week, and the surface is leveled by polishing etc. And Sumitomo Rubber Industries, Ltd. primer C918B
Was treated with a primer.
【0047】しかる後、プライマー硬化前に下記実施例
1〜4および比較例1〜4の弾性舗装材よりなる表層部
を現場施工によって形成した。なお、各例ともに、軟質
骨材(骨材)にはひじきゴム(住友ゴム工業社製ひじ
きゴムFR24:概寸で幅2〜4、長さ2〜40mm
(篩目:2mmストップ、4mmパス))を用いた。硬
質骨材(骨材)には住友ゴム工業社製シリカサンドを
用いた。樹脂バインダーには、一液硬化型ウレタン樹脂
(住友ゴム工業社製GB0007)を用いた。Then, before curing the primer, a surface layer portion made of the elastic pavement material of Examples 1 to 4 and Comparative Examples 1 to 4 below was formed by on-site construction. In each of the examples, soft aggregate (aggregate) has hijiki rubber (Sumitomo Rubber Industries, Ltd. hijiki rubber FR24: approximate width 2 to 4 and length 2 to 40 mm).
(Screen mesh: 2 mm stop, 4 mm pass)) was used. As the hard aggregate (aggregate), silica sand manufactured by Sumitomo Rubber Industries, Ltd. was used. A one-component curing type urethane resin (GB0007 manufactured by Sumitomo Rubber Industries, Ltd.) was used as the resin binder.
【0048】そして、軟質骨材に各例毎に調粒された硬
質骨材(骨材)を所定の配合比で配合し、さらに各例
毎に所定の粘度に調節された樹脂バインダーを加え、万
能攪拌機で均一に攪拌した。その攪拌混合物を施工機
(住友ゴム社製ゴムチップ施工機P200)にて幅1m
×長さ25m、厚さ20mmで現場施工し、1週間養生
させて均一な表層部を得た。この表層部について、以下
に示す〜の評価試験を実施した。Then, a hard aggregate (aggregate), which has been granulated for each example, is blended with the soft aggregate at a predetermined blending ratio, and a resin binder adjusted to have a predetermined viscosity is added for each example, The mixture was uniformly stirred with a universal stirrer. Width of the agitated mixture is 1 m with a construction machine (Sumitomo Rubber Co., Ltd. rubber chip construction machine P200)
× On-site construction with a length of 25 m and a thickness of 20 mm, followed by curing for 1 week to obtain a uniform surface layer portion. With respect to this surface layer portion, the following evaluation tests 1 to 3 were carried out.
【0049】:混合、攪拌性
材料が均一に混合、攪拌できるか。また、骨材にバイン
ダーが均一に分散できるかを目視にて確認する。評価
は、非常に良好を◎とし、良好を○とし、やや不良を△
とし、不良を×の4段階とした。
:敷均し、舗装性
打設時において、材料が敷き均しやすいか、また、仕上
げやすいかを、作業員のアンケート調査により評価。評
価は、非常に良好を◎とし、良好を○とし、やや不良を
△とし、不良を×の4段階とした。
:舗装の平坦性
舗装面の平坦性かどうかを舗装面上を歩行、車両走行し
て判断した。評価は、非常に平坦を◎とし、平坦を○と
し、やや凹凸(不陸)を感じる△とし、凹凸(不陸)大
きいを×の4段階とした。Mixing / stirring ability Can the materials be uniformly mixed and stirred? Also, visually confirm whether the binder can be uniformly dispersed in the aggregate. As for the evaluation, ◎ means very good, ○ means good, and △ means slightly bad.
And the defect was rated at four levels of x. : Leveling and pavement When the material is placed, whether the material is laid out easily and finished easily is evaluated by a questionnaire survey of workers. In the evaluation, ⊚ is very good, ∘ is good, Δ is slightly bad, and × is bad. : Pavement flatness Whether or not the pavement surface was flat was judged by walking on the pavement surface and running the vehicle. In the evaluation, the very flatness was ⊚, the flatness was ∘, the unevenness (unevenness) was slightly felt, and the large unevenness (unevenness) was ×.
【0050】《実施例1》
〔骨材〕ひじきゴム
〔骨材〕シリカサンド3号(最大粒径:1680μ
m、平均粒径:840μm)
〔バインダー〕一液ウレタン(粘度:6500cps)
〔配合重量比〕骨材:骨材:バインダー=100:
30:27
〔混合、攪拌性〕 ○
〔敷均し、舗装性〕 ○〜△
〔舗装の平坦性〕 △
〔総合評価〕 ○Example 1 [Aggregate] Hijiki rubber [Aggregate] Silica Sand No. 3 (maximum particle size: 1680 μ)
m, average particle size: 840 μm) [Binder] One-component urethane (viscosity: 6500 cps) [Compounding weight ratio] Aggregate: Aggregate: Binder = 100:
30:27 [Mixing and stirring property] ○ [Surface leveling and paving property] ○ to △ [Pavement flatness] △ [Comprehensive evaluation] ○
【0051】《実施例2》
〔骨材〕ひじきゴム
〔骨材〕シリカサンド4号(最大粒径:1190μ
m、平均粒径:590μm)
〔バインダー〕一液ウレタン(粘度:6500cps)
〔配合重量比〕骨材:骨材:バインダー=100:
30:27
〔混合、攪拌性〕 ○
〔敷均し、舗装性〕 ○
〔舗装の平坦性〕 △
〔総合評価〕 ○Example 2 [Aggregate] Hijiki rubber [Aggregate] Silica Sand No. 4 (maximum particle size: 1190μ)
m, average particle size: 590 μm) [Binder] One-component urethane (viscosity: 6500 cps) [Compounding weight ratio] Aggregate: Aggregate: Binder = 100:
30:27 [Mixing and stirring] ○ [Laying and paving] ○ [Pavement flatness] △ [Comprehensive evaluation] ○
【0052】《実施例3》
〔骨材〕ひじきゴム
〔骨材〕シリカサンド6号(最大粒径:300μm、
平均粒径:105μm)
〔バインダー〕一液ウレタン(粘度:6500cps)
〔配合重量比〕骨材:骨材:バインダー=100:
30:27
〔混合、攪拌性〕 ○
〔敷均し、舗装性〕 ○
〔舗装の平坦性〕 ○
〔総合評価〕 ○Example 3 [Aggregate] Hijiki Rubber [Aggregate] Silica Sand No. 6 (maximum particle size: 300 μm,
Average particle size: 105 μm) [Binder] One-component urethane (viscosity: 6500 cps) [Compounding weight ratio] Aggregate: Aggregate: Binder = 100:
30:27 [Mixing and stirring] ○ [Laying and paving] ○ [Flatness of paving] ○ [Comprehensive evaluation] ○
【0053】《実施例4》
〔骨材〕ひじきゴム
〔骨材〕シリカサンド6号(最大粒径:300μm、
平均粒径:105μm)
〔バインダー〕一液ウレタン(粘度:3500cps)
〔配合重量比〕骨材:骨材:バインダー=100:
30:27
〔混合、攪拌性〕 ◎
〔敷均し、舗装性〕 ◎〜○
〔舗装の平坦性〕 ◎〜○
〔総合評価〕 ◎〜○Example 4 [Aggregate] Hijiki Rubber [Aggregate] Silica Sand No. 6 (maximum particle size: 300 μm,
Average particle size: 105 μm) [Binder] One-component urethane (viscosity: 3500 cps) [Compounding weight ratio] Aggregate: Aggregate: Binder = 100:
30:27 [Mixing and agitation] ◎ [Surface leveling and paving] ◎ to ○ [Pavement flatness] ◎ to ○ [Comprehensive evaluation] ◎ to ○
【0054】〈比較例1〉
〔骨材〕ひじきゴム
〔骨材〕なし
〔バインダー〕一液ウレタン(粘度:11000cp
s)
〔配合重量比〕骨材:骨材:バインダー=100:
0:27
〔混合、攪拌性〕 ×
〔敷均し、舗装性〕 ×
〔舗装の平坦性〕 ×
〔総合評価〕 ×<Comparative Example 1> [Aggregate] Hijiki rubber [Aggregate] None [Binder] One-component urethane (viscosity: 11000 cp)
s) [Compound weight ratio] Aggregate: Aggregate: Binder = 100:
0:27 [Mixing and stirring] x [Laying and paving] x [Pavement flatness] x [Comprehensive evaluation] x
【0055】〈比較例2〉
〔骨材〕ひじきゴム
〔骨材〕なし
〔バインダー〕一液ウレタン(粘度:6500cps)
〔配合重量比〕骨材:骨材:バインダー=100:
0:27
〔混合、攪拌性〕 △
〔敷均し、舗装性〕 ×
〔舗装の平坦性〕 △
〔総合評価〕 △Comparative Example 2 [Aggregate] Hijiki rubber [Aggregate] None [Binder] One-component urethane (viscosity: 6500 cps) [Compounding weight ratio] Aggregate: Aggregate: Binder = 100:
0:27 [Mixing and stirring] △ [Laying and paving] × [Flatness of paving] △ [Comprehensive evaluation] △
【0056】〈比較例3〉
〔骨材〕ひじきゴム
〔骨材〕なし
〔バインダー〕一液ウレタン(粘度:2500cps)
〔配合重量比〕骨材:骨材:バインダー=100:
0:27
〔混合、攪拌性〕 ○〜△
〔敷均し、舗装性〕 △
〔舗装の平坦性〕 △
〔総合評価〕 △Comparative Example 3 [Aggregate] Hijiki rubber [Aggregate] None [Binder] One-component urethane (viscosity: 2500 cps) [Compound weight ratio] Aggregate: Aggregate: Binder = 100:
0:27 [Mixing and stirring] ○ to △ [Laying and paving] △ [Paving flatness] △ [Comprehensive evaluation] △
【0057】〈比較例4〉
〔骨材〕ひじきゴム
〔骨材〕シリカサンド1号(最大粒径:3360μ
m、平均粒径:2380μm)
〔バインダー〕一液ウレタン(粘度:6500cps)
〔配合重量比〕骨材:骨材:バインダー=100:
30:27
〔混合、攪拌性〕 ×
〔敷均し、舗装性〕 △〜×
〔舗装の平坦性〕 △
〔総合評価〕 ×<Comparative Example 4> [Aggregate] Hijiki rubber [Aggregate] Silica Sand No. 1 (maximum particle size: 3360 μ)
m, average particle size: 2380 μm) [Binder] One-component urethane (viscosity: 6500 cps) [Compounding weight ratio] Aggregate: Aggregate: Binder = 100:
30:27 [Mixing and stirring property] X [Surface leveling and paving property] △ to X [Pavement flatness] △ [Comprehensive evaluation] ×
【0058】参考までに、上記実施例1〜4および比較
例1〜4の仕様と評価結果を表1に示す。For reference, Table 1 shows specifications and evaluation results of Examples 1 to 4 and Comparative Examples 1 to 4 described above.
【0059】[0059]
【表1】 [Table 1]
【0060】上記実施例1〜4および比較例1〜4は本
発明の一部であり、その他種々の検討を行った。その結
果として、以下の〜の知見を得た。The above Examples 1 to 4 and Comparative Examples 1 to 4 are a part of the present invention, and various other studies were conducted. As a result, the following findings were obtained.
【0061】:実施例1〜4と比較例4により、軟質
骨材に硬質骨材を加えることにより、硬質骨材が軟質骨
材間に入り込んで、いわゆる「コロ」の働きをすること
で、各評価が向上する。ただし、平均粒径が1000μ
mを越えると、評価が徐々に低下する。According to Examples 1 to 4 and Comparative Example 4, by adding the hard aggregate to the soft aggregate, the hard aggregate penetrates between the soft aggregates and functions as a so-called "roller". Each evaluation improves. However, the average particle size is 1000μ
When it exceeds m, the evaluation is gradually lowered.
【0062】:実施例3,4により、硬質骨材の粒径
が500μmよりも小さいほど、より顕著にその評価が
向上する。According to Examples 3 and 4, the smaller the particle size of the hard aggregate is less than 500 μm, the more significantly the evaluation is improved.
【0063】:比較例1〜3により、硬質骨材を入れ
ない場合はバインダーの粘度が低く、その量が多いほど
良好な混合状態が得られる。その結果、バインダー粘度
が5Pa・s(5000cps)以下で、骨材:バイン
ダー=100:20〜100:35の範囲であれば、現
場施工にも耐え得る。According to Comparative Examples 1 to 3, when the hard aggregate is not added, the viscosity of the binder is low, and the larger the amount, the better the mixed state can be obtained. As a result, if the binder viscosity is 5 Pa · s (5000 cps) or less and the range of aggregate: binder = 100: 20 to 100: 35, it can withstand on-site construction.
【0064】:CS硬度計における、弾性舗装体の表
面の硬度が60以上であれば、舗装面に車両走行用とし
て十分な耐力があり、歩行および車両走行時に安定であ
り、かつ、舗装面にクラックなどが発生しにくい。When the hardness of the surface of the elastic pavement is 60 or more in the CS hardness tester, the pavement surface has sufficient proof strength for running the vehicle, is stable during walking and running the vehicle, and is stable on the pavement surface. Hard to crack.
【0065】:舗装面の湿潤時に60km/h走行し
た際の、DFテスタにおける弾性舗装体表面の動摩擦計
数が0.4以上であれば、歩行および車両走行の双方に
おいて、滑りにくく安全な舗装面が得られる。なお、実
施例3で仕上げた舗装面の動摩擦計数は、0.48であ
った。If the dynamic friction coefficient of the surface of the elastic pavement in the DF tester when running 60 km / h when the pavement surface is wet is 0.4 or more, the pavement surface is not slippery and safe in both walking and vehicle running. Is obtained. The dynamic friction coefficient of the pavement surface finished in Example 3 was 0.48.
【0066】[0066]
【発明の効果】以上説明したように、本発明によれば、
過半量(50重量%以上)がファイバー状ゴムによって
占められる骨材に、モース硬度が7以上であり、かつ、
平均粒径が1000μm以下の硬質骨材を軟質骨材10
0重量%に対して5重量%以上加えることにより、軟質
骨材間に硬質骨材が入り込んで、いわゆる「コロ」のよ
うな円滑材的機能を果たし、従来、現場施工に適さなか
ったファイバー状ゴムの弾性舗装体が現場施工可能にな
る。As described above, according to the present invention,
An aggregate in which a majority of the fibers (50% by weight or more) is occupied by fibrous rubber has a Mohs hardness of 7 or more, and
Hard aggregates with an average particle size of 1000 μm or less are used as soft aggregates 10.
By adding 5% by weight or more to 0% by weight, the hard aggregate enters between the soft aggregates, fulfills a smooth material function like a so-called "roller", and is conventionally not suitable for on-site construction. Elastic pavement made of rubber can be installed on site.
【図1】本発明の弾性舗装体の模式的断面図。FIG. 1 is a schematic sectional view of an elastic pavement of the present invention.
1 路盤 2 下地 3 弾性舗装材 30 表層部 31 軟質骨材 32 硬質骨材 1 roadbed 2 groundwork 3 elastic paving material 30 Surface layer 31 Soft aggregate 32 hard aggregate
Claims (6)
(50体積%以上)がファイバー状ゴムによって占めら
れた骨材を施工現場でバインダーと混合し、所定の下地
上に打設して構築される弾性舗装体において、 モース硬度が7以上であり、かつ、平均粒径が1000
μm以下の硬質骨材が上記軟質骨材100重量%に対し
て5重量%以上含まれていることを特徴とする弾性舗装
体。1. An aggregate composed of a soft aggregate and a hard aggregate, the majority of which (50% by volume or more) is occupied by fibrous rubber, is mixed with a binder at a construction site, and is cast on a predetermined lower ground. In the elastic pavement constructed as described above, the Mohs hardness is 7 or more, and the average particle size is 1000.
An elastic pavement characterized by containing 5% by weight or more of hard aggregate having a size of not more than μm with respect to 100% by weight of the soft aggregate.
バインダーの粘度が1〜8Pa・s(1000〜800
0cps)である請求項1に記載の弾性舗装体。2. The hard aggregate is an inorganic material, and the binder has a viscosity of 1 to 8 Pa · s (1000 to 800).
The elastic pavement according to claim 1, which is 0 cps).
率(重量)が、100:12〜100:35である請求
項1または2に記載の弾性舗装体。3. The elastic pavement according to claim 1, wherein the compounding ratio (weight) of the total aggregate and the binder is 100: 12 to 100: 35.
S硬度計にて測定した表面の硬度が60以上である請求
項1ないし3のいずれか1項に記載の弾性舗装体。4. In the cured state of the binder, C
The elastic pavement according to any one of claims 1 to 3, wherein a surface hardness measured by an S hardness meter is 60 or more.
る、DFテスタにて測定した表面の動的摩擦係数が0.
4以上である請求項1ないし4のいずれか1項に記載の
弾性舗装体。5. The dynamic friction coefficient of the surface measured by a DF tester when running at 60 km / h in a wet state is 0.
The elastic pavement according to any one of claims 1 to 4, which is 4 or more.
体の50体積%以上を占める骨材に、モース硬度が7以
上であり、かつ、平均粒径が1000μm以下の硬質骨
材を上記軟質骨材100重量%に対して5重量%以上加
えて、施工現場にてバインダーとともに混合して得られ
た弾性舗装材を所定の下地上に打設する工程を含むこと
を特徴とする弾性舗装体の舗装方法。6. A soft aggregate comprising fibrous rubber occupying 50% by volume or more of the total, and a hard aggregate having a Mohs hardness of 7 or more and an average particle diameter of 1000 μm or less is used as the soft bone. 5% by weight or more based on 100% by weight of the material, and a step of placing an elastic pavement material obtained by mixing with a binder at a construction site on a predetermined lower ground. Paving method.
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Cited By (3)
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JP2010043418A (en) * | 2008-08-11 | 2010-02-25 | Japan Racing Association | Construction method for surface layer body, surface layer body, and reprocessing method for surface layer body |
JP2011021361A (en) * | 2009-07-15 | 2011-02-03 | Yokohama Rubber Co Ltd:The | Laminated structure of low noise pavement body and repair construction method for low noise pavement body |
JP2011137375A (en) * | 2011-04-15 | 2011-07-14 | Japan Racing Association | Method of regenerating surface body |
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