JP2004092046A - Pavement structure and paving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the separation and destruction of a pavement material from being caused by a stress concentration on a boundary between a normal pavement and an elastic pavement. <P>SOLUTION: A sealing material layer 4 is interposed in the boundary between the elastic pavement 2 and the normal pavement 3. After an elastic pavement material is laid and cured on the surface of a substrate 1 in such a manner that a gap is formed between the pavement 3 and the surface of the substrate 1, a sealing material is infilled into the gap and cured. The expansion/contraction of the elastic pavement material can be absorbed and abated by the expansion/contraction absorbing power of a sealing material layer 4. This prevents the separation and destruction of the pavement material from occurring by the stress concentration on the adhesive boundary between the pavement 3 and the pavement 2, so that a paved surface excellent in durability can be formed. <P>COPYRIGHT: (C)2004,JPO

Description

【００４９】
【表１】

【００５０】
この表１に示す硬質骨材配合は、１．１８ｍｍふるい目を通過する細粒成分の割合６５重量％であり、この配合の弾性舗装材により、空隙率２５％の弾性舗装面が形成される。
【００５１】
実施例１〜３
ゴムチップ弾性舗装材の温度変化による伸縮は１日の温度変化によっても起こるが、夏冬を含めた四季の温度差によるものが顕著である。従って、このことを考慮して、次の手順で実際のフィールドでの試験施工を通して２年間の追跡調査を行った。
【００５２】
（１）　通常舗装部の切削
表２に示す通常舗装部を深さ８０ｍｍ切削し、次に５０ｍｍ厚さの半たわみ舗装を打設養生して弾性舗装材の打設工区を作成した。なお、周囲の通常舗装部との接合部は切削前にカッターで切断し、その面を接合面とした。
【００５３】
（２）　プライマー処理
下地及び通常舗装部との接合部に湿気硬化型１液性ウレタン樹脂プライマーを塗布してプライマー処理を施した。
【００５４】
（３）　シーリング材打設用の間隙の形成
シーリング材打設部に木枠を固定した。この木枠としては、所定の幅のシーリング材層を形成し得る間隙が形成されるように、その幅を調整した。
【００５５】
（４）　弾性舗装材の施工
弾性舗装材を木枠で囲まれた下地上に打設し、転圧、養生を経て弾性舗装部を形成した。施工された弾性舗装部は幅３．５ｍ×長さ１５ｍ×厚さ３０ｍｍである。
【００５６】
（５）　シーリング材の打設
弾性舗装材が硬化した後、木枠を取り除き、形成された間隙の内面（間隙に表出した通常舗装断面、弾性舗装断面及び下地面）にシーリング材専用のプライマー（（株）ブリヂストン製「ペタムプライマーＮｏ．３」）を塗布した後、養生後、２液硬化型ポリウレタンシーリング材（（株）ブリヂストン製「ペタムＰＵ２０３０」）をこの間隙に気泡が入らないように充填し、表面を平滑仕上げ後、この表面にスベリ止め用の５号珪砂を散布し、その後、養生硬化させた。
形成されたシーリング材層の幅は表２に示す通りである。
【００５７】
（６）　評価
施工後、２年経過後に通常舗装部と弾性舗装部との境界部及び下地について、剥離、クラック等の有無を調べ、結果を表２に示した。
【００５８】
比較例１
シーリング材層を形成しなかったこと以外は実施例１と同様にして施工を行い、同様に評価を行って結果を表２に示した。
【００５９】
比較例２
シーリング材層を形成しなかったこと以外は実施例３と同様にして施工を行い、同様に評価を行って結果を表２に示した。
【００６０】
【表２】

【００６１】
以上の結果から、弾性舗装部と通常舗装部との境界にシーリング材を打設することによって、舗装材の剥離、破壊を防止して、耐久性を高めることができることがわかる。
【００６２】
【発明の効果】
以上詳述した通り、本発明の舗装構造及び舗装方法によれば、通常舗装部と弾性舗装部との境界部における応力集中に起因する舗装材の剥離、破壊が効果的に防止され、この舗装面を走行する車輌等による機械的な劣化要因や、紫外線、降雨、熱、酸素等の自然環境的な劣化要因に対する耐久性に優れた舗装構造が提供される。
【図面の簡単な説明】
【図１】本発明の舗装構造の実施の形態を示す断面図である。
【図２】従来の舗装構造を示す断面図である。
【符号の説明】
１　下地
２　弾性舗装部
３　通常舗装部
４　シーリング材層[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, a pavement portion made of an elastic pavement material (hereinafter sometimes referred to as an “elastic pavement portion”) is provided in a region adjacent to a pavement portion made of a normal pavement material (hereinafter sometimes referred to as a “normal pavement portion”). The present invention relates to a formed pavement structure and a pavement method, and particularly to a pavement structure in which separation and destruction of a pavement material due to stress concentration at a boundary portion between a normal pavement portion and an elastic pavement portion are prevented, and such a pavement structure is constructed. Related to the pavement method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a waste tire recycling technique, there is a technique in which a rubber chip obtained by mechanically grinding a waste tire is combined with a hard aggregate with a urethane binder to form an elastic pavement material. This rubber chip elastic pavement material is used as a pavement material for sidewalks, stadiums, etc., because it has excellent effects such as shock absorption during walking and safety when falling due to the elasticity of the rubber chip, In addition to the drainage and ventilation provided by the voids formed in the elastic pavement material, the sound absorption is also effective in reducing the noise generated on tires and on the road surface. It is attracting attention as a paving material.
[0003]
The action mechanism of the tire noise reduction by the gap of the rubber chip elastic pavement is as follows. That is, the tire noise generated from the road surface is caused by the vibration due to the contact between the tire tread and the road surface, the vibration caused by the tread pattern or the sidewall, and the noise generated by the groove such as the rib groove and the lug groove and the road surface. The main source of noise is due to resonance. On the other hand, when there is a gap on the road surface, resonance in the groove is less likely to occur, and the generated noise itself is reduced, and the noise is reduced by the sound absorbing effect of the gap.
[0004]
Further, in the rubber chip elastic pavement material, the vibration is interfered by its elasticity, so that the noise due to the vibration is reduced, so that the noise reduction effect can be obtained.
[0005]
The pavement portion made of such an elastic pavement material is formed by laying an elastic pavement material after applying a primer treatment to a construction base surface as necessary. In this case, as shown in FIG. 2 is formed on the foundation 1 by adjoining and bonding to a normal pavement 3 such as asphalt pavement or concrete pavement.
[0006]
That is, even for roadway use, sidewalks, parks, and other uses, the entire surface is rarely an elastic pavement surface. However, even if a new elastic pavement surface is to be installed or a new elastic pavement surface is to be constructed, since the gutters and curb are usually used as pavement parts, the boundary between the elastic pavement part and the normal pavement part will be adjacent to each other. Department will be present.
[0007]
[Problems to be solved by the invention]
The rubber chip elastic pavement material expands and contracts due to environmental temperature, shrinks at low temperature, and expands at high temperature, and its expansion coefficient is larger than that of ordinary pavement materials such as general asphalt pavement and concrete pavement. Therefore, due to the large expansion and contraction due to the temperature difference of the rubber chip elastic pavement material, stress concentrates near the bonding interface between the elastic pavement portion 2 and the normal pavement portion 3 (portion R in FIG. 2). As a result, the pavement material is peeled or broken.
[0008]
{Circle around (1)} Cracks and peeling occur at the bonding interface between the elastic pavement and the normal pavement, which causes the formation of a defective portion serving as a fracture nucleus of the pavement. When the elastic pavement is long in one direction, such a phenomenon is likely to occur at the boundary between the both ends in the longitudinal direction and the normal pavement.
{Circle around (2)} The destruction of the bonding interface of (1) above becomes the core, and the destruction proceeds on the ordinary asphalt pavement or the ordinary pavement such as concrete pavement. In particular, asphalt pavement is easily broken.
{Circle around (3)} When the bonding strength of the bonding interface is strong, a fracture nucleus is usually formed by cracking of the pavement. This phenomenon is unlikely to occur on concrete pavements, but easily occurs on asphalt pavements.
{Circle around (4)} The elastic pavement surface becomes uneven due to the destruction phenomenon occurring at the bonding interface, and when an external force acts on the unevenness, the elastic pavement material also peels or breaks. For example, when a car running on the surface of the elastic pavement jumps and falls due to unevenness on the surface, the elastic pavement is impacted, thereby causing peeling and destruction of the elastic pavement material.
{Circle around (5)} Due to the above [1] to [4], destruction such as cracks and cracks also occurs in the substrate.
[0009]
When such a pavement material is peeled or broken, the defective portion is further enlarged due to a mechanical deterioration factor caused by a vehicle traveling on the pavement material or a natural environmental deterioration factor such as ultraviolet rays, rainfall, heat, oxygen, and the like. If it is significant, it becomes unusable.
[0010]
The present invention solves the above-mentioned conventional problems, and a pavement structure in which peeling of a pavement material caused by stress concentration at a boundary portion between a normal pavement portion and an elastic pavement portion, breakage is prevented, and such a pavement structure is provided. It is intended to provide a pavement method to be constructed.
[0011]
[Means for Solving the Problems]
The pavement structure according to the present invention is a pavement structure having a pavement portion made of an elastic pavement material and a pavement portion made of a normal pavement material. Characterized by intervening.
[0012]
By interposing a sealing material layer at the boundary between the normal pavement portion and the elastic pavement portion, the expansion and contraction of the elastic pavement material can be absorbed and reduced by the expansion and contraction absorption capacity of the sealing material layer. It is possible to prevent the pavement material from peeling and breaking due to the stress concentration at the bonding boundary portion with the elastic pavement portion, and to provide a pavement surface having excellent durability.
[0013]
In the present invention, the width of the sealing material layer is preferably 5 to 200 mm, particularly preferably 10 to 100 mm. Further, as the sealing material, silicon-based, urethane-based, polysulfide-based, polyisobutylene-based sealing material, particularly urethane-based sealing material is preferable, and the surface of the sealing material layer is subjected to anti-slip treatment by aggregate. preferable.
[0014]
In the present invention, the elastic pavement is, for example, a mixture of a hard aggregate, an elastic aggregate and a binder, and the pavement surface of the ordinary pavement is, for example, a concrete pavement surface, a semi-flexible pavement surface, an asphalt pavement surface, It is a cut asphalt pavement surface, a drainage pavement surface, or a permeable pavement surface.
[0015]
The pavement method of the present invention is a method suitable for constructing such a pavement structure of the present invention, and is a method of constructing a pavement portion made of an elastic pavement material in a region adjacent to a pavement portion made of a normal pavement material on a ground surface. In the method, an elastic pavement material is laid on the base surface with a gap provided with a pavement portion made of the normal pavement material and cured, and then the gap is filled with a sealing material and cured.
[0016]
In this method, it is preferable that after the gap is filled with the sealing material, an aggregate is sprayed on the sealing material before the sealing material is cured, and then the sealing material is cured to perform an anti-slip treatment. Further, it is preferable that the sealing material is filled after the inner surface of the gap is subjected to the primer treatment.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a pavement structure and a pavement method of the present invention will be described in detail with reference to the drawings.
[0018]
FIG. 1 is a sectional view showing an embodiment of the pavement structure of the present invention.
[0019]
As shown in the figure, in the present invention, when the elastic pavement 2 is constructed adjacent to the normal pavement 3 on the foundation 1, a sealing material layer 4 is interposed between the normal pavement 3 and the elastic pavement 2. The sealing material layer 4 absorbs and relaxes the expansion and contraction of the elastic pavement material.
[0020]
The sealing material (sealant material) is not particularly limited as long as it is excellent in elasticity and absorbability and excellent in flexibility, but the elongation after curing is 100 to 1000%, particularly about 200 to 800%. Are preferred. If the elongation after curing is less than 100%, the elasticity of stretching is not sufficient, and if it exceeds 1000%, the mechanical properties are poor, which is not preferable. Examples of such a sealing material include silicon-based, urethane-based, polysulfide-based, and polyisobutylene-based materials. These may be a one-component curing type or a two-component curing type. It is particularly preferable to use a urethane-based sealing material from the viewpoint that the sealing material layer is rich in elasticity, excellent in stretch absorption and absorption, and has good wear resistance and excellent durability.
[0021]
In addition, when the pavement structure of the present invention is applied to an existing road or the like, it is preferable to use a high-speed curing type sealing material in order to reduce traffic cut-off time. A sealing material may be used.
[0022]
If the width (W in FIG. 1) of the sealing material layer 4 is too small, the effect of the present invention due to the provision of the sealing material layer 4 cannot be obtained, and if it is too large, the surface of the sealing material layer occupying the pavement surface. Increases, and the function of the entire pavement surface is impaired, which is not preferable. Therefore, the width of the sealing material layer 4 varies depending on the required elasticity, that is, the length of the elastic pavement 2 and the type of the normal pavement 3, but usually 5 to 200 mm, particularly about 10 to 100 mm. It is preferable that
[0023]
The thickness (D in FIG. 1) of the sealing material layer 4 is preferably approximately the same as the thickness of the elastic pavement 2 as shown in FIG. 1, for example, approximately 10 to 50 mm. Accordingly, the elastic pavement portion 2 may be formed to be thicker than the thickness thereof, or may be formed to be shallower.
[0024]
In order to construct such a pavement structure of the present invention, an elastic pavement is formed by providing a gap for forming the sealing material layer 4 in a portion adjacent to the normal pavement portion 3 on the foundation 1. After curing, the gap may be filled with a sealing material and cured.
[0025]
In this case, the gap for forming the sealing material layer can be formed by placing an elastic pavement material in a state where the frame material and the like are arranged in advance, and removing the frame material after the elastic pavement material is cured.
[0026]
When the elastic pavement material is cast, a primer treatment is performed on the base 1 as necessary. Also, when filling the formed gap with the sealing material, it is preferable to apply a primer treatment to the inner surface of the gap, that is, the side surface of the normal pavement, the exposed surface of the base, and the side surface of the elastic pavement.
[0027]
When the width of the sealing material layer 4 is large, the sealing material layer 4 may be subjected to an anti-slip treatment with an aggregate in order to increase the slip resistance, abrasion resistance, durability and the like of the sealing material layer 4. This anti-slip treatment can be easily performed by filling the formed gap with the sealing material, spraying the aggregate on the sealing material layer before curing the sealing material, and then curing the sealing material. As the aggregate in this case, a fine grain component of a hard aggregate of an elastic pavement material described later can be used.
[0028]
The sealing material is preferably cast after the elastic pavement material is constructed, but may be cast before the elastic pavement material is constructed.
[0029]
Next, the elastic pavement material suitably used for the construction of the elastic pavement surface in the present invention will be described.
[0030]
This elastic pavement material is obtained by combining a hard aggregate and an elastic aggregate with a urethane binder.
[0031]
The hard aggregate is blended in order to secure the strength and wear resistance of the elastic pavement material, and to expose it to the surface to obtain an anti-slip effect. The hard aggregate is not particularly limited, and generally includes, for example, natural aggregates made of natural stones such as river gravel and river sand, and artificial aggregates such as crushed stone, slag, and ceramics. They may be used alone or in combination of two or more. From the viewpoint of the slip resistance of the pavement road surface, it is preferable that a certain amount of the fine component having a certain particle size is contained in such a hard aggregate, for example, when the passing weight ratio of the 1.18 mm sieve is 5% or more. Preferably, there is. The presence of such fine-grained components in the hard aggregate causes the pavement surface to be rough like sandpaper, thereby providing an anti-slip effect. The hard aggregate other than such fine-grained components preferably has a particle size of about 1.2 to 13 mm. In particular, the hard aggregate has such coarse-grained components of 5 to 50% by weight and fine-grained components of 95 to 50% by weight.
[0032]
The elastic aggregate is blended to give elasticity to the pavement surface. As the elastic aggregate, a rubber chip, that is, a small piece or powder of rubber can be used, preferably a rubber chip having a size of 10 mm or less, and a fine particle having a particle size of 1 mm or less to a size of about 10 mm. Although it can be used as appropriate, in particular, those having a particle size of about 1 to 5 mm are more preferable because they are effective in terms of elasticity and void formation. Such a rubber chip may be either natural rubber or synthetic rubber, and a recycled product obtained by mechanically pulverizing a vulcanized rubber product such as a waste tire can also be used.
[0033]
When considering the slip resistance, the mixing ratio of the hard aggregate and the elastic aggregate is such that the ratio of the hard aggregate to the total amount of both aggregates is 10 to 75% by volume, particularly 15 to 50% by volume. Is preferred. That is, in the constituent material of the elastic pavement material, the content of the hard aggregate determines the slip resistance of the pavement surface. Therefore, by blending the hard aggregate in the above range, the BPN (measured value by the portable skid resistance tester) 60 can be obtained. The above-mentioned slip resistance can be secured. If the ratio of the hard aggregate is smaller than the above range, not only the slip resistance but also the amount of distortion of the pavement surface due to the vehicle weight increases, which undesirably affects the steering stability. On the other hand, when the amount of the hard aggregate is larger than the above range, the ratio of the elastic aggregate relatively decreases, and the elasticity of the elastic pavement material is impaired, which adversely affects the low noise performance, which is not preferable.
[0034]
The hard aggregates and elastic aggregates are generally classified according to JIS A hardness into a hardness of 95 degrees or more and an elastic aggregate of 90 degrees or less in JIS A hardness. The hardness of the waste tire is usually 60 to 70 degrees, and about 80 to 90 degrees if it is heated.
[0035]
The urethane binder is used to bind these hard aggregates and elastic aggregates to form a pavement, and in the present invention, particularly, a two-pack urethane binder, preferably an isocyanate group terminal prepolymer and A mixture obtained by mixing a polyol with an equivalent ratio of hydroxyl group / isocyanate group, for example, from 0.2 to 0.8 is used. The one-component urethane binder is not suitable for the purpose of the present invention because it is very difficult to adjust the curing time compared to the two-component urethane binder, is not versatile, and has difficulty in shortening the curing time. The amount of the urethane binder to be added is preferably 15 to 30% by volume based on the total amount of the hard aggregate, the elastic aggregate and the urethane binder from the viewpoint of the binding strength of the aggregate.
[0036]
In addition, as an example of the isocyanate terminal group prepolymer of the two-part urethane binder, the isocyanate content is 5 to 25%, the viscosity is 1000 to 5000 cP (25 ° C.), and the average number of functional groups of the isocyanate terminal group prepolymer is 2 to 3. Things. Examples of the isocyanate for the prepolymer include diphenylmethane diisocyanate-based polyisocyanate. As the active hydrogen compound used for the modification, usually, a polyalkylene glycol having a molecular weight of about 1,000 to 3,000 is used.
[0037]
On the other hand, as an example of the polyol, it is preferable that the average number of functional groups is 2 to 6, the average molecular weight is 1000 or less, and from the viewpoint of reactivity, half or more of the hydroxyl groups are primary hydroxyl groups. Glycol, diethylene glycol, polyalkylene ether glycol and the like.
[0038]
Further, by adding the organic silane to the urethane binder in an amount of 0.1 to 10% by weight, the bonding strength between the urethane binder and the aggregate can be increased, and the strength and durability can be improved. As the organic silane, an epoxy silane, a mercapto organic silane, or the like can be used.
[0039]
When it is required to impart a color to the elastic pavement material, it is possible to color the urethane binder by mixing a coloring agent. In that case, it is preferable that the colorant is mixed in an amount of 1 to 10% by weight based on the urethane binder. As the colorant, for example, a carbon-based material may be used in the case of black, and a titanium-based material may be used in the case of white. It is also possible to color the pavement material using a colored rubber chip as an elastic aggregate, for example, a color rubber chip of EPDM, or an artificial aggregate such as ceramics colored as a hard aggregate.
[0040]
Further, the elastic pavement material may contain a urethane binder curing accelerator and other additives.
[0041]
Such an elastic pavement material can be obtained by mixing a mixture of a hard aggregate and an elastic aggregate with a urethane binder and further additives such as a coloring agent added as necessary. In this case, an additive such as a coloring agent may be previously mixed with the urethane binder, or may be added and mixed when the aggregate and the urethane binder are mixed. The method of mixing the aggregate and the urethane binder is not particularly limited, as long as they can be uniformly mixed. The temperature at the time of adding and mixing the urethane binder to the aggregate may be room temperature, but if the temperature is low, the curing is delayed, and if the temperature is high, the curing is accelerated. Therefore, the temperature is adjusted as necessary.
[0042]
Such an elastic pavement material is usually laid on a groundwork surface such that a gap having a porosity of about 10 to 40% is formed at a thickness of about 10 to 50 mm.
[0043]
On the other hand, as the normal pavement material for forming the normal pavement surface, those generally used for pavement such as roads, for example, concrete pavement, semi-flexible pavement, asphalt pavement, cut asphalt pavement, drainage pavement, water-permeable pavement, and the like. However, the present invention is particularly suitable for asphalt pavement, drainage pavement, water-permeable pavement, and the like, in which separation and destruction due to stress easily occur.
[0044]
In addition, as a foundation, the above-mentioned normal pavement is generally applied.
[0045]
The pavement structure of the present invention is particularly suitable for roadway applications due to its excellent durability in addition to the inherent noise and vibration reduction effect of elastic pavement materials, but is not limited to roadway applications, such as sidewalks, stadiums and parks. It is also suitable as an elastic pavement surface.
[0046]
【Example】
Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
[0047]
In the following, the materials used for the preparation of the elastic pavement material are as follows, and had the composition shown in Table 1 below.
[0048]

[0049]
[Table 1]

[0050]
In the hard aggregate composition shown in Table 1, the proportion of fine particles passing through a 1.18 mm sieve is 65% by weight, and an elastic pavement material having this composition forms an elastic pavement surface having a porosity of 25%. .
[0051]
Examples 1-3
The expansion and contraction of the rubber chip elastic pavement due to the temperature change also occurs due to the temperature change in one day, but is remarkable due to the temperature difference in the four seasons including summer and winter. Therefore, in consideration of this, a 2-year follow-up survey was conducted through a test construction in an actual field in the following procedure.
[0052]
(1) Cutting of normal pavement section The normal pavement section shown in Table 2 was cut to a depth of 80 mm, and then a semi-flexible pavement having a thickness of 50 mm was cast and cured to form a placement section for an elastic pavement material. The joint with the surrounding normal pavement was cut with a cutter before cutting, and the surface was used as the joint surface.
[0053]
(2) Primer treatment A moisture-curable one-component urethane resin primer was applied to the base and the joint with the normal pavement to perform a primer treatment.
[0054]
(3) Formation of gap for sealing material casting A wooden frame was fixed to the sealing material casting portion. The width of the wooden frame was adjusted so that a gap capable of forming a sealing material layer having a predetermined width was formed.
[0055]
(4) Construction of elastic pavement material An elastic pavement material was cast on a ground surrounded by a wooden frame, and the elastic pavement was formed through rolling and curing. The constructed elastic pavement is 3.5 m wide × 15 m long × 30 mm thick.
[0056]
(5) Casting of sealing material After the hardening of the elastic pavement material, the wooden frame is removed, and a primer dedicated to the sealing material is applied to the inner surface of the formed gap (the normal pavement section, the elastic pavement section and the base surface exposed in the gap). After applying (Petam Primer No. 3 manufactured by Bridgestone Corp.) and curing, a two-component curable polyurethane sealing material (Petam PU2030 manufactured by Bridgestone Corp.) is used to prevent air bubbles from entering this gap. After smooth finishing the surface, No. 5 silica sand for preventing slippage was sprayed on the surface, and then cured and cured.
The width of the formed sealing material layer is as shown in Table 2.
[0057]
(6) Two years after the evaluation and construction, the boundary portion between the normal pavement portion and the elastic pavement portion and the base were examined for peeling, cracks, and the like. The results are shown in Table 2.
[0058]
Comparative Example 1
The construction was performed in the same manner as in Example 1 except that the sealing material layer was not formed. The evaluation was performed in the same manner, and the results are shown in Table 2.
[0059]
Comparative Example 2
The construction was performed in the same manner as in Example 3 except that the sealing material layer was not formed. The evaluation was performed in the same manner, and the results are shown in Table 2.
[0060]
[Table 2]

[0061]
From the above results, it can be seen that by placing the sealing material at the boundary between the elastic pavement portion and the normal pavement portion, the pavement material can be prevented from peeling and breaking, and the durability can be increased.
[0062]
【The invention's effect】
As described above in detail, according to the pavement structure and the pavement method of the present invention, the separation and destruction of the pavement material due to the stress concentration at the boundary between the normal pavement and the elastic pavement are effectively prevented. Provided is a pavement structure excellent in durability against mechanical deterioration factors caused by a vehicle traveling on a surface and natural environmental deterioration factors such as ultraviolet rays, rainfall, heat, and oxygen.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of a pavement structure according to the present invention.
FIG. 2 is a cross-sectional view showing a conventional pavement structure.
[Explanation of symbols]
1 Base 2 Elastic pavement 3 Normal pavement 4 Sealing material layer

Claims (11)

In a pavement structure having a pavement portion made of an elastic pavement material and a pavement portion made of a normal pavement material,
A pavement structure comprising a sealing material layer interposed at a boundary between a pavement portion made of the elastic pavement material and a pavement portion made of a normal pavement material. The pavement structure according to claim 1, wherein the width of the sealing material layer is 5 to 200 mm. The pavement structure according to claim 2, wherein the width of the sealing material layer is 10 to 100 mm. The pavement structure according to any one of claims 1 to 3, wherein the sealing material is a silicon-based, urethane-based, polysulfide-based, or polyisobutylene-based sealing material. The pavement structure according to claim 4, wherein the sealing material is a urethane-based sealing material. The pavement structure according to any one of claims 1 to 5, wherein the elastic pavement material is a mixture of a hard aggregate, an elastic aggregate, and a binder. The pavement structure according to any one of claims 1 to 6, wherein the pavement made of the ordinary pavement material is a concrete pavement, a semi-flexible pavement, an asphalt pavement, a cut asphalt pavement, a drainage pavement, or a water-permeable pavement. . The pavement structure according to any one of claims 1 to 6, wherein a surface of the sealing material layer has been subjected to an anti-slip treatment with an aggregate. In a method of constructing a pavement portion made of an elastic pavement material in an area adjacent to a pavement portion made of a normal pavement material on an underground,
After laying and curing an elastic pavement material on the ground surface with a gap with the pavement part by the normal pavement material,
A pavement method characterized by filling the gap with a sealing material and curing. 10. The pavement method according to claim 9, wherein after the gap is filled with a sealing material, an aggregate is sprayed on the sealing material before the sealing material is cured, and then the sealing material is cured. The pavement method according to claim 9 or 10, wherein after the inner surface of the gap is subjected to a primer treatment, the sealing material is filled.

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