JPH10331107A - Method for constructing stone pavement and stone block unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To establish a method for constructing a stone pavement which can heighten the protection force for stones and with which stone surfaces are not likely contaminated with asphalt. SOLUTION: A plurality of stone blocks 1 are laid on a base roadbed 10 previously adjusted, and an asphalt attachment preventive layer 15 is formed on the surfaces of the stone blocks. A molten asphalt 20 is poured into each joint so that the blocks 1 are adhered to the base roadbed 10, and an asphalt mixture material 27 is put into the joint and subjected to a rolling process, and the asphalt attachment preventive layer 15 is removed so that the contaminant on the block surface is removed as a cleaning process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a stone pavement for laying a concrete stone block or natural stone, and more particularly to a method for constructing a stone pavement capable of withstanding a large load such as a roadway.

[0002]

2. Description of the Related Art Pavement includes stone pavement in addition to asphalt pavement and concrete pavement. Asphalt pavement
Since it is easily worn and has insufficient durability such as being weak to heat, after a certain number of years, it is necessary to dig up and repave it, and it is hard to say that the landscape is good. Concrete pavement is more durable than asphalt pavement, but requires means for thermal expansion, and it is hard to say that the landscape is good. In this regard, stone pavement has been reviewed in Japan in recent years because it has a good landscape, and is used not only on sidewalks but also on roadways.

However, when this stone is used on a pavement, particularly on a road, problems such as breakage of joints, chipping of the corner of the stone, rattling, cracking, and scattering of the stone occur. Most of such damage to the stone pavement is remarkable when mortar is used as a joint material.

[0004] That is, when mortar is used as the joint material, the stone is difficult to move and is stable, the stone is easily prevented from being chipped, the joint material is hard to flow out, and the durability is superior to the sand joint. There are advantages such as, but on the other hand,
The curing period until the mortar hardens becomes longer and traffic cannot be opened immediately after construction.Since it is a joint between a hard stone and a hardened and hardened mortar joint, there is no elasticity and cracks occur when a load is received. Easy, once cracked, joints are easy to come off and repair is also difficult, stones are difficult to pull in during repair, stones are difficult to reuse, expansion joints corresponding to temperature changes are required, etc. There are disadvantages. For this reason, it has been said that stone pavement is not suitable for pavement where the load is large, such as a roadway.

[0005] The use of asphalt as a joint material for mortar joints has the following advantages. It has flexibility, does not easily break to follow the wheel load, does not require an expansion joint corresponding to a temperature change, and has a point that the joint is stabilized in a short time after construction.

[0006]

However, when asphalt is used as a joint material, it has flexibility but no elasticity or supporting force enough to push back the stone, so that the protective force against the stone is inferior to that of the mortar joint. When asphalt adheres to the surface of the stone, it is difficult to remove the asphalt, so that the appearance is easily deteriorated, and joint materials may flow out at high temperatures.

[0007] Even if it is conceivable to use an asphalt mixture instead of asphalt as a joint material in order to improve the protection against stones, it is difficult to reliably fill a narrow and deep joint. . Further, if the asphalt mixture is simply rolled, the asphalt mixture adheres to the surface of the stone, and the attached asphalt cannot be easily removed, so that it cannot be put to practical use.

In addition, when laying stone paving, arranging stones regularly requires a great deal of labor and skilled techniques, and also takes time to fill joint materials. Furthermore, when the stones are laid one by one, the load concentrates on the stone on which the wheels are mounted, and the load cannot be distributed to the surrounding stones. For this reason, it is easy to form a rut in the part where the wheel passes,
There is a problem that the joint of the rut is more easily damaged than other parts.

Accordingly, an object of the present invention is to provide a method of constructing a stone pavement in which the protection against stones can be enhanced with moderate elasticity as compared with the conventional asphalt joint, and the stone surface is hardly stained with asphalt. It is intended to provide a stone block unit suitable for pavement.

[0010]

Means for Solving the Problems The present invention has been proposed to achieve the above object, and the invention of the construction method according to claim 1 lays a plurality of stone blocks on a pre-adjusted foundation roadbed. Stone block laying step, an anti-adhesion layer forming step of applying an asphalt anti-adhesion agent to the surface of the stone block to form an asphalt adhesion prevention layer, and pouring the molten asphalt into the joint between the laid stone blocks. Adhesion process for adhering the block to the foundation roadbed, asphalt mixture filling process where the asphalt mixture obtained by kneading the asphalt and the aggregate is put into the joints and rolling is performed, and excess asphalt mixture on the stone blocks is eliminated. And a cleaning process for removing dirt on the surface of the stone block by removing the asphalt adhesion preventing layer. It is the law.

In the construction method according to the second aspect of the present invention, before the molten asphalt poured into the joint is hardened, the asphalt mixture is charged into the joint and compacted. The construction method of the stone pavement.

In the construction method according to a third aspect of the present invention, in the stone block laying step, a plurality of stone blocks are joined to each other in a state where a joint member is provided with a gap serving as a joint, and are unitized in advance. A stone pavement construction method characterized by laying a stone block in a unitized state.

According to a fourth aspect of the present invention, an asphalt adhesion preventing layer is formed by applying lime water to the surface of a stone block and drying the same, and in the cleaning step, the surface of the stone block is washed with water. It is a construction method of a stone pavement characterized by removing dirt together with an asphalt adhesion preventing layer.

According to a fifth aspect of the present invention, a plurality of stone blocks are joined to each other in a state in which a joint member has a gap therebetween to form a unit, and water-soluble asphalt is prevented from adhering to the surface of each stone block. It is a stone block unit characterized by forming a layer.

According to a sixth aspect of the present invention, there is provided the stone block unit, wherein the asphalt adhesion preventing layer is a layer obtained by applying lime water and drying.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a stone block unit 2 formed by connecting a plurality of stone blocks 1 used for pavement, and FIG. 2 is a side view of the stone block unit 2.

The stone block unit 2 is formed by joining a plurality of stone blocks 1... Formed in an appropriate shape to each other with a joint member 3. In addition, the position of each stone block 1, the planar shape, and the gap D between the stone blocks 1, 1 are adjusted in each stone block unit 2 so that the aesthetic appearance after the construction is improved and the joint material can be uniformly filled. The shape, position and predetermined dimensions are standardized so as to be the same.

Each of the stone blocks 1 is formed by a so-called quick demolding method in which sand, cement, a little water, a binder to be blended as required, and the like are filled in a mold, compacted by pressing, and immediately removed from the mold. Concrete block. On the surface (upper surface) of the stone block 1, a colored layer (not shown) having an appropriate color or pattern is formed by imitating natural stone in order to improve the scenery. This coloring layer employs a so-called permeation coloring method in which a coloring liquid is applied in advance to the inside of a mold, and the coloring pigment is penetrated into the filled concrete particles to color the surface portion. In addition, the mold is provided with appropriate irregularities imitated from a real stone or imitating a stone, and the ground of natural stone is formed on the surface of the demolded stone block 1 in combination with the above-described permeation coloring. It is desirable to do so.

The stone block unit 2 is formed by assembling a plurality of the above-described stone blocks 1... With a gap D therebetween. The joint member 3 may have any configuration as long as it can connect the stone block 1, but in the present embodiment, as shown in FIG. 3, a diameter of about 6 mm in which thin metal wires are bundled.
The wire is cut to a predetermined length, and a retaining portion 4 having an enlarged diameter is formed at both ends. The joint member 3 is not limited to a flexible wire, but may be a metal or plastic pin having stopper portions 4 formed at both ends.

In order to connect the stone block 1 with the joint member 3 as described above, a partition wall is provided in a mold, and a concave portion for forming the stone block 1 is formed in an appropriate shape. A small concave notch for mounting the joint member 3 is formed at each location, and the stone block 1 is molded with the joint member 3 set in this notch.
Since the partition wall functions as a member forming the gap D serving as a joint, the joint member 3 is moved across the partition wall.
When this is set, this joint member 3
The stone blocks 1 and 1 adjacent to each other across the gap D between them will be joined.

When the stone block units 2 are sequentially laid, the outer peripheral shape of the stone block units 2 is set so that the gap D 'between the adjacent stone block units 2 is the same as the gap D between the stone blocks 1. And a complementary shape to be combined. In other words, the shape is such that the convex portion and the concave portion are combined so that the distance between the two can maintain a constant dimension D '. The stone block unit 2 is large enough to be carried by a worker,
The finished dimensions are, for example, 900 mm x
Set to about 600mm, 100m thick for roadway
It is desirable to set it to about m. And since the position of the said partition wall becomes clearance D of each stone block 1, ie, a joint, the thickness (gap D) of this partition wall is about 20 mm, for example, for roadways. The thickness depends on the application (load)
Can be adjusted as appropriate, and the gap D serving as a joint is also the same.

Since the stone block unit 2 molded in this manner is molded by a mold, the entire outer peripheral shape, the shape and position of each stone block 1, and the gap D
Are all unified, that is, standardized.

Next, a method of paving using the above-described stone block unit 2 will be described. First, a foundation roadbed 10 is formed in advance on a pavement road surface, and a stone block unit 2 is placed on the foundation roadbed 10 at a predetermined interval D ′ (=
D) is vacated and laid sequentially.

As shown in FIG. 4, for example, as shown in FIG. 4, the foundation roadbed 10 has a cut crushed stone layer 11 having a thickness of about 250 mm and a coarse asphalt concrete layer 12 having a thickness of about 40 mm. A semi-flexible pavement 13 having a thickness of about 60 mm is provided thereon, and a sand layer 14 having a thickness of about 30 mm is provided thereon.
Is formed. The foundation roadbed 10 is the same as the conventional foundation roadbed, and its design can be appropriately changed according to the use such as a sidewalk or a road, or the number of passing vehicles in a road.

When the foundation roadbed 10 is formed, the stone block units 2 are sequentially laid at predetermined intervals on the foundation roadbed 10 (stone block laying step).

When the installation of the stone block units 2 is completed, an asphalt adhesion preventing agent is applied to the surface (upper surface) of each stone block 1 and dried to form an asphalt adhesion preventing layer 15 (adhesion preventing layer). Forming step). This asphalt adhesion preventive agent is for preventing the asphalt mixture described later from adhering to the surface of the stone block 1 even when placed on the surface of the stone block 1 so that it can be easily peeled and removed. Therefore, any component may be used as long as it has an asphalt adhesion preventing function. For example, in this embodiment, the stone block 1 is formed on site by applying lime water after drying, and then drying. However, before the stone block laying step, for example, the stone blocks 1 may be formed on the surface of each stone block 1 in a factory or on site. When the asphalt adhesion preventing layer 15 is formed in a factory in advance, it is desirable to mix a small amount of a water-soluble binder in order to prevent cracking and peeling during transportation. In this way, if the asphalt adhesion preventing layer 15 is formed on the surface of the stone block 1 in advance, the time for application and drying at the construction site can be omitted, so that work efficiency can be improved.

When the applied lime water has dried and the asphalt adhesion preventing layer 15 has been formed, the molten asphalt 20 is poured into the gap D (ie, joint) of the stone block 1 and each of the molten asphalts 20 is used. The stone block 1 is bonded to the foundation roadbed 10 (bonding step). The molten asphalt 20 is a liquid material that contains asphalt and functions as an adhesive, and is, for example, straight asphalt or asphalt emulsion that is heated and melted.

In order to inject such molten asphalt 20 into the joint, an injecting device 21 is used as shown in FIG. The injection device 21 includes a molten asphalt storage section 23 having a small outlet 22 at the lower end,
And a handle 25 extending upward from the storage part 23. Therefore, while operating the handle 25, the molten asphalt storage section 23 is operated.
The molten asphalt 20 that has flowed down from the outlet 22 can be easily injected into the joint D when the vehicle travels while the outlet 22 is positioned above the joint (gap D).
Further, since the molten asphalt 20 has fluidity, even if the molten asphalt 20 is injected with the injection device 21 stopped, the molten asphalt 20 flows in the joint portion D along the extending direction. In addition, it is desirable to inject into the joint portion D an amount sufficient to have a depth of about 10 mm.

When the molten asphalt 20 is injected into the joint portion D, the molten asphalt 20 gradually penetrates into the foundation roadbed 10, so that each of the stone blocks 1 is
Can be adhered to.

Next, the asphalt mixture 27 obtained by kneading the asphalt and the aggregates 26 is charged into the joint portion D, and is then compacted (asphalt mixture filling step). The asphalt mixture 27 to be charged into the joint portion D may be one that is constructed in a heated state as before, or one that has been developed recently and can be constructed at room temperature (asphalt room temperature mixture). In this embodiment, since the width of the joint is 20 mm, the aggregate 2
It is preferable to use particles having a particle diameter of 6 mm or less. The asphalt mixture 27 to be charged into the joint D
It is desirable that the amount is slightly raised from the surface of the stone block 1 as shown in FIG.

When the asphalt mixture 27 is charged to the extent that it rises slightly in this way, the asphalt mixture 27 is rolled using a rolling device (not shown) such as a block compactor or a roller. Asphalt mixture 2 along the joint
7, the asphalt mixture 27 itself is compacted, as well as the asphalt mixture 27 is filled into every corner of the joint, so that the molten asphalt 20 accumulated at the bottom in the joint is asphalt. Mix 2
7 penetrates the small gaps and spreads. Therefore, the molten asphalt 20 previously injected, the asphalt mixture 27 compacted in the joint portion D, the foundation roadbed 10, and the stone block 1 are firmly integrated.

During the above-mentioned compaction work, the asphalt mixture 27 raised from the joint portion D is pressed by the stone block 1
Surplus asphalt mixture 27 spills on the surface of the stone block 1, but since the asphalt adhesion preventing layer 15 is formed on the surface of the stone block 1, the asphalt mixture 27 directly adheres to the surface of the stone block 1. Nothing. Further, even if the surplus asphalt mixture spilled on the surface of the stone block 1 is pressed by the rolling device, the surface of the stone block 1 can be prevented from being greatly damaged by the protection by the asphalt adhesion preventing layer 15.

When the compaction operation is completed, FIG.
As shown in (c), the excess asphalt mixture on the stone block 1 is eliminated, and the asphalt adhesion preventing layer 1 is removed.
5 is removed to remove dirt on the surface of the stone block 1 (cleaning step).

As described above, the surface of the stone block 1 is coated with lime water and dried to prevent the asphalt adhesion preventing layer 15 from being applied.
Is formed, and since the adhesion preventing layer 15 is water-soluble,
When the surface of the stone block 1 is washed with water, the adhesion preventing layer 1
5 dissolves in water and flows, thereby preventing the adhesion preventing layer 1
Dirt such as the asphalt mixture 27 and the droplets of the molten asphalt 20 adhered on the surface 5 are easily washed away. Therefore, dirt can be reliably removed by a very simple operation of washing with water. For this reason, even if the molten asphalt 20 is injected into the narrow joint portion D or the asphalt mixture 27 is charged and compacted, black asphalt dirt is not left on the surface of the stone block 1 and the appearance is impaired. There is no.

When the asphalt-adhesion preventing layer 15 is removed by washing with water, if the surface of the stone block 1 is uneven by washing with a brush, the asphalt mixture 27 can be reliably washed away. Can be easily removed by sweeping, so that the working efficiency is good. When the work of compacting the asphalt mixture 27 is completed, it is desirable to finish the joint while pressing the joint with a joint trowel.

The molten asphalt 20 injected into the joint
Since the asphalt mixture 27 as the joint material filled in the joint portion does not require curing like the mortar joint material, the traffic can be released immediately after the completion of the cleaning process, that is, immediately after the construction. Therefore, the time for blocking traffic can be reduced.

In the stone pavement according to the present embodiment, since the plurality of stone blocks 1 are joined together by the joint member 3 to form a unit, not only the work of laying the stone blocks 1 can be facilitated, but also. After laying, the load applied to one stone block 1 can be dispersed via the joint member 3. Therefore, the load can be reduced as compared with the case where the stone blocks 1 are laid one by one independently, whereby the damage can be reduced and the durability can be increased.

In addition, since the joint material is flexible, the stone block 1 can follow the stone block 1 when a wheel load is applied thereto, so that the stone block 1 is hard to be damaged, and an expansion joint corresponding to a temperature change is unnecessary. The asphalt joints, such as stabilization of the joints in a short time after construction, are left as they are, and the asphalt mixture 27 is filled as the joint material. Strength and protection can be significantly increased. Moreover,
Since there is elasticity that could not be expected with mortar joint material,
After following the wheel load, it can be surely restored to the original state, thereby hardly being damaged.

Asphalt mixture 2 as joint material
Even if 7 is introduced and compacted, no dirt is left on the surface of the stone block 1, so that a stone pavement excellent in aesthetic appearance can be easily constructed.

In the above-described embodiment, a description has been given of a stone pavement for a road on which a stone block unit 2 in which a plurality of stone blocks 1 are joined to each other by a joint member 3 is laid, but the present invention is not limited thereto. Instead, it can be implemented in other applications such as sidewalks. And
The stone block 1 to be laid may be laid in a single state without being joined by a joint member.
Is not limited to concrete but may be natural stone.

[0041]

According to the present invention as described above, the following effects can be obtained. According to the first aspect of the present invention, since the method includes the step of forming an asphalt adhesion preventing layer by applying an asphalt adhesion preventing agent to the surface of the stone block, molten asphalt is injected or injected into the narrow joint. Even if the asphalt mixture is compacted and drops of molten asphalt fly or spill on the surface of the stone block, these asphalt materials can be easily removed in the cleaning step. Therefore, after the construction, no noticeable black and asphalt stain remains on the surface of the stone block. For this reason, it is possible to provide a stone pavement with an excellent landscape immediately after the construction.

Further, a bonding step of pouring molten asphalt into the joints between the laid stone blocks and bonding the stone blocks to the foundation roadbed, and charging an asphalt mixture obtained by kneading asphalt and aggregate into the joints. Since the method includes the step of filling the asphalt mixture, which is to be compacted, the foundation roadbed, the stone block, and the joint material can be more firmly integrated than in the case of the conventional asphalt joint. And since an aggregate is contained in a joint material, the supporting force and protection force of the joint material with respect to a stone block can be remarkably improved compared with the case of the conventional asphalt joint which does not contain an aggregate. Moreover, since the mortar joint material has elasticity that could not be expected, it can be reliably restored to the original state after the stone block follows the wheel load. And such a function could not be expected in the conventional mortar joint which becomes a rigid body. As described above, in the present invention, since the stone block which is a rigid body is protected by the joint made of the asphalt mixture having appropriate elasticity and supporting force, the stone block is hardly damaged, and the durability can be improved.

According to the second aspect of the present invention, before the molten asphalt poured into the joint is hardened, the asphalt mixture is charged into the joint and rolled. It rises while penetrating the mixture. Therefore, the foundation roadbed, the stone block, and the joint material can be more firmly integrated.

According to the third aspect of the present invention, in the stone block laying step, a plurality of stone blocks are joined to each other in a state where a gap serving as a joint is opened by a joint member to form a unit in advance, and this unitized state is obtained. Since the stone block is laid, the stone block can be laid efficiently in a short time. Moreover, it is easy to reliably increase the accuracy of the arrangement of the stone blocks, the dimensions of the joints, and the like. Therefore, the stone pavement excellent in the scenery can be easily constructed with the arrangement of the stones as designed. Moreover, since each stone block is joined by the joint member, the load of the stone block can be dispersed, which contributes to improvement in durability.

According to the fourth aspect of the present invention, the asphalt adhesion preventing layer is formed by applying lime water to the surface of the stone block and drying the same, and in the cleaning step, the surface of the stone block is washed with water to form an asphalt adhesion preventing layer. Since dirt is removed, the formation and removal of the asphalt adhesion preventing layer is extremely simple. In addition, when lime water is used, it is very easy to obtain and handle, and the cleaning step is also simple because it can be easily removed particularly by washing with water.

According to the fifth aspect of the present invention, a plurality of stone blocks are joined to each other in a state where a joint member has a gap therebetween to form a unit, and a water-soluble asphalt adhesion preventing layer is provided on the surface of each stone block. With the formed stone block unit, not only can the laying work be performed simply and efficiently, but also the load applied to one stone block can be dispersed, so that the stone block is less likely to be damaged and the durability can be increased. Further, since the water-soluble asphalt adhesion preventing layer can be formed in advance at the factory, construction on site is easy. Furthermore, since the asphalt adhesion preventing layer is water-soluble, it can be easily removed by washing with water.

According to the sixth aspect of the present invention, since the asphalt adhesion preventing layer is a layer obtained by applying lime water and drying it, it can be easily formed by a simple operation. It can be easily removed.

[Brief description of the drawings]

FIG. 1 is a plan view of a stone block unit in which a plurality of stone blocks are joined by a joint member.

FIG. 2 is a side view of the stone block unit.

FIG. 3 is a front view of a joint member.

4A is a side view of the joint in a state in which molten asphalt is injected into the joint, FIG. 4B is a side view of the joint in a state in which the asphalt mixture is injected into the joint, and FIG. It is a side view of the joint after removing an asphalt mixture and washing away an asphalt adhesion prevention layer.

FIG. 5 is a side view of the injection device.

[Explanation of symbols]

 Reference Signs List 1 stone block 2 stone block unit 3 joint member 4 retaining member 10 foundation roadbed 11 cut crushed stone layer 12 coarse asphalt layer 13 semi-flexible pavement 14 sand layer 15 asphalt adhesion preventing layer 20 molten asphalt 21 injection device 22 outlet 23 molten asphalt storage section 24 Wheel 25 Handle 26 Aggregate 27 Asphalt mixture

Claims (6)

[Claims] 1. A stone block laying step of laying a plurality of stone blocks on a pre-adjusted foundation roadbed, and forming an anti-adhesion layer by applying an asphalt anti-adhesion agent to the surface of the stone blocks to form an asphalt adhesion prevention layer A bonding step of pouring the molten asphalt into the joints between the laid stone blocks and bonding the stone blocks to the foundation roadbed; and loading the asphalt mixture obtained by kneading the asphalt and the aggregate into the joints and then rolling. A stone characterized by comprising: a step of filling asphalt mixture to be pressed; and a cleaning step of removing excess asphalt mixture on the stone block and removing an asphalt adhesion preventing layer to remove dirt on the surface of the stone block. Construction method of pavement. 2. The method for constructing a stone pavement according to claim 1, wherein before the molten asphalt poured into the joint is hardened, the asphalt mixture is charged into the joint and rolled. 3. The stone block laying step comprises joining a plurality of stone blocks together in a state where a joint member has a gap therebetween to form a unit, and laying the stone blocks in this unitized state. The method for constructing a stone pavement according to claim 1 or 2, wherein: 4. An asphalt-adhesion preventing layer is formed by applying lime water to the surface of a stone block and drying it. In a cleaning step, the surface of the stone block is washed with water to remove dirt together with the asphalt-adhesion preventing layer. The method for constructing a stone pavement according to any one of claims 1 to 3, wherein: 5. A unit in which a plurality of stone blocks are joined to each other with a joint member having a gap therebetween to form joints, and a water-soluble asphalt adhesion preventing layer is formed on the surface of each stone block. And stone block unit. 6. The stone block unit according to claim 5, wherein the asphalt adhesion preventing layer is a layer obtained by applying lime water and drying.