JPH0136963Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pavement body with cushioning properties suitable for pavements mainly used for walking by people, such as pavements in golf courses, promenades, and parks.

Cement concrete pavements and asphalt concrete pavements have hard pavements, which cause discomfort to pedestrians due to the vibrations, shocks, and sound of shoes transmitted from the soles of their shoes every time they walk.

In order to make it suitable for walking, it is desirable to have a pavement that has cushioning properties, like a road made of natural soil.
To achieve this, it is necessary to construct roads as resilient pavements. The present invention is a pavement body that takes these matters into consideration.

In this invention, a cushion layer consisting of sand, soil, etc. stabilized with asphalt emulsion, cutback asphalt, etc. is provided on the base, and on the upper surface, 1 to 10 parts by weight of sand and asphalt emulsion (evaporated) are applied to 1 part by weight of cement. (converted to 60% residue by weight) 0.1~
A long fiber-reinforced cement bituminous mortar layer made by incorporating long fibers in a mixture containing 6 parts by weight as the main component in an amount of 0.2 to 5% by volume based on the volume of the mixture and curing the long fiber reinforced cement bituminous mortar layer is buffered. The gist is a structure of a pavement with cushioning properties, which is characterized by being provided as a layer.

The cushioning pavement according to the present invention (hereinafter simply referred to as pavement) will be explained using figures. 1 and 2 are cross-sectional views showing the pavement structure of one embodiment of the pavement body of the present invention. In the case of Figure 2, a protective layer is added on the pavement body of the present invention. An example of a thin bituminous pavement layer is shown.

In the figure, 1 is the base. This base 1 is
The targets are natural roads made of native soil, which are leveled and compacted using vibrating rollers, etc., to form the base. In addition, in order to prevent the finished surface of the pavement from bulging, excavation to an appropriate thickness, removal of soil, leveling, and compaction may be used as a base. In addition, to strengthen the native soil, crushed stone may be added to strengthen it and use it as a base. Of course, various crushed stone roadbeds, stabilized roadbeds, gravel roads, etc. will also serve as the foundation. 2
is a cushion layer provided on the upper surface of the substrate 1. 3 is a compacted layer of sand, soil, etc. that forms the cushion layer 2, and the sand, soil, etc. are mixed with thread rubber, powdered rubber, fiber waste, sawdust, etc. up to about 30% by volume. (Hereinafter, these are simply referred to as sand, soil, etc.). 4 in Figure 1
This layer is bituminized by spreading asphalt emulsion, cutback asphalt, or the like to make it seep through the surface of the compacted layer 3 of sand, soil, etc. Further, 4' in FIG. 2 is a layer formed by mixing sand, soil, etc. with asphalt emulsion, cutback asphalt, etc. and compacting it. in this way,
In the case of FIG. 1, the cushion layer 2 consists of a layer 3 made of compacted sand, soil, etc., and a layer 4 made of this layer treated with bitumen. In the case of FIG. 2, it consists of a layer 4' made of sand, soil, etc. mixed with asphalt emulsion, etc., and compacted. A buffer layer 5 is provided on the cushion layer 2. 6 is long fiber;
7 is a layer (hereinafter simply referred to as a hardened bituminous cement layer) obtained by hardening a mixture (hereinafter simply referred to as mortar) mainly composed of cement, sand, and asphalt emulsion, and contains long fibers 6. That is,
The buffer layer 5 is provided on the upper surface of the cushion layer 2,
It is composed of a long fiber hardened bituminous cement layer consisting of long fibers 6 and a hardened bituminous cement layer 7.
The long fibers 6 are inside the hardened bituminous cement layer 7, bonding thereto and reinforcing it. 8 is a protective layer, such as a thin layer of bituminous pavement provided on the upper surface of the buffer layer 5.

The long fibers 6 used in the buffer layer 5 of the present invention are fibers such as glass fibers, natural fibers, regenerated fibers, semi-synthetic fibers, synthetic fibers, carbon fibers, metal fibers, etc. It is made of long fibers such as strands, single threads, twisted threads, and twisted threads. These continuous fibers, or those cut into appropriate lengths to make a mat shape, net-like cloth, non-woven cloth, etc., can be used. In particular, the bulky, pine-shaped ones are easy to use. Furthermore, long fibers cut into pieces of at least 25 mm or more can be used.

Bituminous cement A mixture of bituminous hardened products whose main components are cement, sand, asphalt emulsion, etc., ie, mortar, each of which is mixed with the mortar as follows.

Examples of cement include Portland cement, fly ash cement, blast furnace cement, silica cement, blast furnace colloid cement, colloid cement, jet cement, alumina cement, and sulfate-resistant cement.

In addition to these cements, admixtures such as cement shrinkage compensators, hardening accelerators, hardening retarders, AE agents, dispersing agents, thickeners, water reducing agents, blowing agents,
Antifoaming agents etc. can be used together.

Sand includes natural sand such as river sand, mountain sand, and sea sand, as well as sand made by crushing mine slag, rocks, and cobblestones.
Silica sand, sintered ash sand, iron sand, foundry sand, etc. are used. In addition to sand, glass powder, silica sand powder, fly ash, pigment, filler, mica powder, wood powder, cork powder, rubber powder, perlite, etc. can also be used in combination. Further, short fibers such as inorganic fibers, organic fibers, and carbon fibers can also be mixed.

The bitumen emulsion may be a bituminous material selected from petroleum asphalts, natural asphalts, tars, pitches, etc., or a mixture of two or more of them, or a bitumenous material containing rubber, synthetic polymers, etc. Bituminous materials modified by adding and mixing molecular polymers, etc. are emulsified with anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, bentonite, etc. as main emulsifying agents, and further as necessary. emulsifying agent,
These bituminous emulsions can be emulsified in water using appropriate dispersants, stabilizers, protective colloids, etc., or rubber latexes, synthetic polymer emulsions, synthetic resin emulsions, water-soluble polymers, and water-soluble bituminous emulsions. It is a mixture of synthetic resins and the like. Further, a mixture of a reactive water-soluble or emulsified epoxy resin and a reactive resin such as a curing agent thereof can be used.

The bitumen emulsion that is usually used is asphalt-based, with an evaporation residue of about 55 to 70% by weight, and a penetration of the evaporation residue (at 25°C) of about 30 to 400.

The mortar composition is 1 part by weight of cement (hereinafter referred to as
bituminous emulsion (evaporation residue 60%)
0.1 to 6 parts (in terms of weight%) and 1 to 10 parts of sand.

When using cement shrinkage compensators, hardening accelerators, etc., include them in the amount of cement in the above mixing ratio.

The mortar can be kneaded using a mortar mixer, concrete mixer, grout mixer, pug mill, etc., and water is appropriately added as necessary to adjust the workability of the mortar.

The amount of long fibers used in the mortar is such that the amount of fibers is in the range of 0.2 to 5% by volume based on the volume of the mortar.

The thickness of the buffer layer 5 varies depending on the type and condition of the substrate 1, but is within the range of 3 to 10 cm, usually 3 to 6 cm.
Use in moderation.

A protective layer can further be provided on the upper surface of the pavement in the present invention. In such cases, the thickness is 30
mm or less is used. For example, bituminous pavements include two-layer spray surface treatment with asphalt emulsion or cutback asphalt and crushed stone, slurry seal with a mixture of asphalt emulsion and sand, fine-grained ascon, modified topeka, topeka, sand asphalt, asphalt mortar, goose. There are asphalt, sinker pet, etc. In addition, there are colored pavements made of thermoplastic synthetic resins, reactive synthetic resins, etc., and color coats made of colored synthetic resin paints.

Next, the construction of the cushioning pavement according to the present invention will be explained. As shown in FIG. 1, sand, soil, etc. of a predetermined thickness is spread on a base 1 and compacted with rollers. A predetermined amount of permeable asphalt emulsion, cutback asphalt, etc. is sprinkled onto the top surface of the layer, and the layer is permeated, and the upper part of the layer of sand, soil, etc. is bonded with bitumen, thereby imparting waterproofness and stabilization. Then, the cushion layer 2 is formed. When increasing the thickness of the cushion layer, it is preferable to process it in two layers. Also, the second
As shown in the figure, a predetermined amount of asphalt emulsion, cutback asphalt, etc. is mixed with sand, soil, etc., and a predetermined amount of asphalt emulsion, cutback asphalt, etc. is mixed and spread, and the sand,
The cushion layer 2 can also be formed by forming a bitumen-treated layer of soil or the like. When the cushion layer 2 is thick,
Construction will be done in two layers. To construct the buffer layer 5, for example, a mat made of long fibers 6 is laid on the cushion layer 2, and if necessary, a formwork is placed around the periphery to fill in the gaps between the fibers of the mat and form the buffer layer 5 to a predetermined thickness. A method of filling mortar with mortar and curing it, a method of filling mortar with a mixture of cut long fibers 6 to a predetermined thickness, a method of cutting long fibers 6 and filling with mortar by spraying, etc. . In either case, the combination of vibration can facilitate recharging. The filled surface of the mortar is smoothed with a rake, trowel, etc., and then hardened. After curing, the pavement is completed. Furthermore, when providing the protective layer 8, on the buffer layer 5,
It is provided by a conventionally known method.

In the cushioning pavement of the present invention, the cushion layer 2 and the buffer layer 5 work together to exhibit cushioning properties. The long fiber-reinforced hardened bituminous cement layer of the buffer layer 5 is strong in tension and bending, has high flexibility, and has the property of not cracking or breaking even when bent to a large extent. Therefore, the bending of the base 1 and the cushion layer 2 can be followed. It also has high impact load absorption.

The shock-absorbing pavement of the present invention is constructed as described above, has shock-absorbing properties, and absorbs shock loads when people walk.
It absorbs vibrations, so it does not cause discomfort. It also has a sound deadening effect, making footsteps less noticeable. It provides adequate cushioning even for soles with sharp points such as spike shoes, and provides a good walking feel. It also does not break and is resistant to wear.

It has practical benefits such as being able to construct the pavement using a cold construction method.

Example 1 The road surface is excavated to a depth of about 10 cm, and unevenness is leveled by sufficiently compacting it with vibrating rollers. 5.5 m ³ /100 m ² of coarse sand with a moisture content of 3 to 5% by weight is spread and compacted with a vibroplate to create a 5 cm thick sand layer. Spray 300/ ^100m2 of 53% by weight). Penetration is about 2 cm on average. Next, a continuous glass fiber strand mat (bulky, 5 cm thick) was laid on top of this cushion layer. Next, from this top surface, about 7.9 tons/100m of mortar is mixed with 1 part by weight of cement, 2.2 parts by weight of sand, 2.5 parts by weight of asphalt emulsion for mixing with cationic cement (60% by weight of evaporation residue), and a small amount of water. Pour ² into it, create a vibration and charge it. In this way, the pine is contained within the filled mortar layer. Then, let the mortar harden. The finished surface is the same as the original road surface or is slightly raised. In this way, the pavement body of the present invention was constructed. Two days later, a 5 mm thick slurry seal made of cationic asphalt emulsion and coarse sand was applied to the surface to provide a protective layer.

Example 2 The road surface is excavated to a depth of about 10 cm, and unevenness is leveled by sufficiently compacting it with vibrating rollers. Spread 5.5 m ³ /100 m ² of coarse sand with a moisture content of 3 to 5% and compact the vibroplate. Next, Pennekote E is sprinkled on the top surface at a ratio of 300/100 m ² to allow it to penetrate. Spread 3.3m ³ /100m ² of coarse sand on top of this and compact it with a vibroplate. Next, Pennekote E is sprinkled on the top surface at a ratio of 200/100 m ² to allow it to penetrate. Thus, a cushion layer with a thickness of 8 cm is formed. From the top, 1 part of cement,
A mortar made by mixing 2 parts of sand and 2.4 parts of asphalt emulsion with a small amount of water and glass fibers (cut into 3 cm lengths) are sprayed at the same time. The amount of fiber is 2.5% by volume of the mortar. The amount of mortar is approximately 5.5t/ ^100m2 . Vibration was sometimes used, and the surface was pressed down with a trowel. Filling was thus completed and the mortar was cured to form a 3 cm thick buffer layer. This finished surface is approximately 1 cm higher than the conventional road surface.

Thus, the pavement of the present invention was completed, and a two-layer surface treatment using an asphalt emulsion was performed as a protective layer and a surface layer (wear layer). That is, 100/100 m ² of asphalt emulsion PK-1 is spread, 0.5 m ³ /100 m ² of No. 7 crushed stone is spread on top of this, and it is rolled by a roller. Next, asphalt emulsion PK-
Spread 120/ ^100m2 and add 0.5 coarse sand on top of this.
A protective layer was applied by spraying m ³ /100 m ² and rolling it with a roller.

Both of the pavement bodies of Example 1 and Example 2,
People feel good when walking. It is also easy to install as it is a cold construction method. Durability is also good.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional views showing the pavement structure of an embodiment of the cushioning pavement of the present invention, and Figure 2 shows a thin bituminous pavement layer as a protective layer on top of the pavement. An example is shown below. In the figure, numeral 1 is the base, 2 is the cushion layer, 3 is the compacted layer of sand, soil, etc., and 4 is the compacted layer of sand, soil, etc., where asphalt emulsion, cutback asphalt, etc. are spread and permeated. treated layer,
4' is a compacted layer of sand, soil, etc. mixed with asphalt emulsion, cutback asphalt, etc., 5 is a buffer layer, 6 is a long fiber layer, 7 is a bituminous cement hardened layer,
and 8 is a protective layer.

Claims (1)

[Scope of utility model registration request] A cushion layer made of sand, soil, etc. stabilized with asphalt emulsion, cutback asphalt, etc. is provided on the base, and on the top surface, 1 to 10 parts by weight of sand and asphalt emulsion (60 parts by weight of evaporation residue) are added to 1 part by weight of cement. Long fibers are cured by incorporating long fibers into a mixture containing 0.1 to 6 parts by weight as the main component (in terms of 0.1 to 6 parts by weight (converted to A pavement body with cushioning properties characterized by providing a fiber-reinforced cement bituminous mortar layer as a buffer layer.