JPH07138910A - Method of paving road using asphalt film - Google Patents

Abstract

PURPOSE:To improve construction efficiency by repeating a process wherein an asphalt film is laid over a base and a heated asphalt material is laid thereon to form a multilayered layer. CONSTITUTION:An asphalt film 1 is formed by attaching asphalt emulsion to the opposite sides of a net-like body and solidifying it. Next, a lower layer base 11 comprising gravel, sand, etc., and an upper layer base 12 comprising crushed stone are successively placed on a subgrade 10 and compacted, following which the film 1 is placed on the base 12 and a heated asphalt material 6 is laid on the film 1. Further, the film l and material 6 are repeatedly laid on the material 6. The film 1 is softened and melted into a single body by the heat of the material 6. By this method, pavement can be formed without using an emulsion sprinkling car and the environment can be prevented from being contaminated with emulsion, and test sprinkling is not needed thereby reducing costs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for performing asphalt pavement work using a film of asphalt material.

[0002]

2. Description of the Related Art Conventionally, asphalt pavement has been very commonly used. However, an aggregate made of quarry, gravel, sand, stone powder, etc. is mixed with heat-melted asphalt and laid out before it gets cold. It is common to compact with a roller, or to cut back asphalt in which asphalt is dissolved in volatile oil, or to spray asphalt emulsion, which is an asphalt dispersed in water, onto the roadbed.
As described in the present invention, a construction method of forming a film body in which asphalt is attached to a mesh body and laying this film body is not found at present.

[0003]

Asphalt is a black or black-brown hydrocarbon compound which is a residue when most of the volatile oil components of the components of petroleum crude oil are evaporated. Although this asphalt is liquid at high temperatures, it becomes very hard at low temperatures and is highly plastic and chemically stable. Therefore, it is often used as a road paving material by mixing with aggregate. The asphalt pavement work that is generally used at present is performed by the following procedure. First, dig up the road surface to be paved, use this exposed surface as the roadbed, and gravel to a thickness of 15 to 40 cm on it.
Spread the sand to form the subgrade. On this lower layer roadbed, crushed stones are spread to a thickness of about 10 to 30 cm to form an upper layer roadbed. The asphalt emulsion is sprinkled on the upper roadbed surface for stabilization. Asphalt emulsion,
It is a dispersion of finely divided asphalt in water. When this is sprayed, water evaporates to form an asphalt film. Next, a mixture of crushed stone, gravel, sand, and stone powder is mixed with heat-melted asphalt to prepare an asphalt mixture, and this mixture is laid on the upper layer roadbed to form a base layer. Then, spray the asphalt emulsion on this base layer.
After drying, an asphalt mixture is further laid to form a surface layer. The surface layer has a denser composition than the base layer, and the base layer and the surface layer may be provided in a plurality of layers depending on the roadbed condition and traffic volume. When providing a plurality of layers, the asphalt emulsion is sprinkled on each layer. The above is a typical example of the conventional asphalt pavement work.

However, there are some problems in carrying out this construction work as described below. (B) A multi-layer tank equipped with a heating device is required for liquid storage of asphalt emulsion. (B) An expensive spraying vehicle (distributor vehicle) is required for emulsion dispersion. In addition, this car has a half life compared to ordinary cars due to tank corrosion and other factors. (C) Since operating a distributor vehicle requires skill, it must take several years to train operators. (D) When emulsion is sprayed, it may be contaminated by splashes of the emulsion on signs and other road attachments, nearby buildings, pedestrian vehicles and passersby. In order to prevent this, guidance of a guard man is indispensable. (E) Distributor cars are equipped with burners for heating emulsions, so noise from these burners tends to be a cause of pollution. (F) After the work, the emulsion adheres to the outer surface of the distributor's vehicle, which makes cleaning and wiping difficult. As described above, the conventional method has various drawbacks, and the present invention was invented to solve the problems relating to the conventional asphalt pavement work described above. Instead of emulsion spraying, a film-shaped asphalt. It is intended to provide an asphalt pavement construction method that can be implemented hygienically in a short period of time by laying timber.

[0005]

As a means for solving the problems, the present invention provides a method of providing a composite layer in which an asphalt film body and an asphalt mixture are alternately arranged. That is, on the roadbed located on the roadbed, lay the asphalt film body, spread the heated asphalt mixture on this film body, lay the asphalt film body on this asphalt mixture, hereinafter this asphalt By laying the mix and asphalt film body alternately,
Multiple layers of this mixture and a film body are formed, and the film body is softened and melted by the heat of the mixture. The present invention is a paved road construction method using the asphalt film body having the above structure.

[0006]

The present invention is characterized in that an asphalt film body is laid in place of the asphalt emulsion. In the present invention, first, the asphalt film body is laid on the roadbed, the heated asphalt mixture is laid on the film body, the film body is further laid on this mixture, and the following is repeated alternately. is there. This asphalt film body is one in which a solid asphalt layer is formed on the upper and lower surfaces of a net-like body, and by laying a heated asphalt mixture on this, the film body is softened and melted by this heat and the mixture is formed. Is integrated with. Therefore,
Since it is a film-like solid when laid, it does not spray liquid like conventional emulsions, so there is no risk of contamination of the surroundings. In addition, since it melts with heat after execution, a road surface equivalent to asphalt pavement by the conventional method can be obtained. In carrying out this construction method, the film body wound in a roll shape can be pulled out and cut at a required position for use, so that it can be carried out quickly and a large number of rolls can be stored.

[0007]

EXAMPLES Examples of the present invention will be described below. The enforcement procedure according to the present invention is shown below. Preparation: (a) Prior to implementation, prepare an asphalt film body (1) wound in a roll shape having an appropriate length, thickness and width according to road conditions. (This film body is described in detail in the separately filed “Film body for asphalt pavement construction and its manufacturing method and apparatus”.) Asphalt fine particles are dispersed in water (Emulsion is attached to the upper and lower surfaces of the reticulate body, and a solid asphalt layer is formed by pulling it up from the emulsion and cooling it.) (B) On the roadbed (10) exposed by excavating the road surface,
A lower roadbed (11) made of gravel and sand and an upper roadbed (12) made of crushed stone are formed on the lower roadbed, respectively. Enforcement: (C) Laying the film body (1) according to the present invention on the upper layer roadbed. When laying, a roll-shaped film body is rotatably mounted on a vehicle, etc.
First, fix on the roadbed with the nails (5), pull out the required amount and cut. (D) The heated asphalt mixture (6) is laid on the film body (1). (E) Laying a film body on the spread asphalt mixture. (F) Spread asphalt mix on this film. (G) Laying a film body and asphalt mixture are alternately performed below. The above is one embodiment of the present invention.

In carrying out this embodiment, as shown in FIG. 2, a roll-shaped film body is rotatably mounted on a loading platform such as a truck, laid while pulling out a necessary amount, and after pulling out an appropriate amount, the film body is pulled out. Disconnect, but in advance
It is also possible to lay a panel-shaped film body that is cut to a required size at a predetermined location. A drainage basin is provided on the pavement surface, but in the conventional emulsion injection method, sheet draining masking is performed on this drainage basin before spraying to cover up and remove the masking after spraying the emulsion. Is. However, this method is very simple because it only needs to cut the necessary parts with a cutter knife or the like. Also, since the film body is solid, it can be stored in a roll form or a panel form in a large number and can be dealt with promptly.

[0009]

The present invention has the following effects. (A) Since an asphalt film body is used in place of the emulsion, a distributor vehicle for spraying the emulsion is unnecessary, and storage and management are easy. (B) Since a solid film body is used, there is no stain on the surroundings due to emulsion spraying, and cleaning after execution is unnecessary. (C) Since the film body is laid on the roadbed, the test spraying is unnecessary, each work involved in the execution is simplified, and the construction period can be shortened and the construction cost can be reduced. INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to provide a construction method that can contribute to environmental hygiene while reducing the equipment cost and construction cost related to the execution of asphalt pavement construction and shortening the construction period.

[Brief description of drawings]

FIG. 1 Explanatory drawing of asphalt pavement construction road layer using the construction method of the present invention

[Fig. 2] Construction explanatory diagram of the construction method of the present invention

FIG. 3 is a partial sectional view of an asphalt film body used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Asphalt film body 1a Reticulate body 1b Asphalt layer 2 Vehicle bed 3 Supporting member 4 Guide roller 5 Eye nail 6 Asphalt mixture 10 Roadbed 11 Lower roadbed 12 Upper roadbed 13 Base layer 14 Surface layer

Claims (1)

[Claims] 1. An asphalt film body is laid on a roadbed located on a roadbed, a heated asphalt mixture is laid on the film body, and an asphalt film body is laid on the asphalt mixture. The asphalt film and the asphalt film body are alternately laid below to form multiple layers of the mixture material and the film body, and the heat of the mixture material softens and melts the film body. Paved road construction method using body.