JP2000063163A - Formed product of asphalt waste material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize an asphalt waste material and reduce the industrial waste b forming a mixture of the asphalt waste material obtained by cutting and removing an asphalt paving layer with a hardener into a prescribed shape and hardening the formed mixture. SOLUTION: A cement-based powder and a rubber-based viscous fluid material are used as a hardener. A fibrous material can be added to an asphalt waste material to further improve the strength. Hozen material, KH-MCA material (R) is used as the rubber-based viscous fluid material and Hozen material, KH-MCB material (R) is used as the cement-based powder. A metal fibrous material such as a steel fiber or further a glass fiber, a carbon fiber, a silicon carbide fiber, etc. are used as the fibrous material. Since the hardener acts as a binder for mutually bonding the asphalt waste materials, a formed product having a sufficient strength as a construction material such as a flower bed block or a Kenti block (wedge block) after hardening is obtained even if a mud component, etc. are contained in the waste material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded product made from an asphalt waste material obtained by cutting and removing an existing asphalt pavement layer, and more particularly to a molded product usable as a construction material.

[0002]

2. Description of the Related Art When roads, bridges, asphalt pavement surfaces such as factories and parks are damaged by long-term use or ground subsidence, repair work is performed.
When performing repair work, it is necessary to cut and remove the existing asphalt pavement layer before constructing new asphalt pavement, but a large amount of asphalt waste material is generated at this time. Since these asphalt waste materials become so-called industrial waste, much labor and cost are spent on their disposal.

Therefore, in recent years, various researches have been conducted on the reuse technology of asphalt waste materials due to the increasing tendency to recycle resources, and asphalt waste materials generated by cutting and removing the existing asphalt pavement layer during road repair work etc. A technology for using it again as a paving material for road surfaces has also been developed.

By utilizing such a technique for reusing asphalt waste materials, it is possible to reduce industrial waste such as asphalt waste materials generated in road repair work.

[0005]

[Problems to be Solved by the Invention] Regarding asphalt pavement roads, a certain level of strength is required depending on the scale of the road and the traffic volume of vehicles, but asphalt waste materials generated during road repair work were reused as pavement materials. In this case, it is difficult for the recycled asphalt pavement to exhibit the same strength as the original asphalt pavement. That is, since the asphalt waste material obtained by cutting and removing the existing asphalt pavement layer contains impurities such as mud, even if additives such as cement are mixed and reused, sufficient strength after curing is obtained. Often cannot be secured.

Therefore, an asphalt waste material recycling technique has been developed in which a certain amount of pretreatment such as removal of impurities contained in the asphalt waste material is performed and then reused as a paving material to secure sufficient strength. However, since these pretreatments are very costly, and the removed impurities become new industrial wastes, and their treatments are also expensive, these asphalt waste material recycling technologies are not often adopted. The reality is that there is none.

[0007] Therefore, asphalt waste materials generated during repair work on asphalt pavement roads are still often disposed of as industrial waste, which causes destruction of the natural environment in the vicinity of the disposal site or waste of asphalt raw materials. There are problems such as.

[0008] Therefore, an object of the present invention is to provide an asphalt waste material molded product which can be easily manufactured by using asphalt waste material and can reduce industrial waste.

[0009]

In order to solve the above problems, the asphalt waste material molded article of the present invention is obtained by molding a mixture of an asphalt waste material obtained by cutting and removing an asphalt pavement layer and a hardening material into a certain shape. It is characterized by being hardened by curing.

With such a construction, the hardened material acts as a binder for adhering the asphalt waste materials to each other. Therefore, even if the asphalt waste material contains a mud component, after hardening, various kinds of flowerbed blocks, kenbiki blocks, etc. A molded product having sufficient strength as a construction material can be obtained. Further, since the asphalt waste material containing the mud component is used, no waste is generated, and it is not necessary to dispose of industrial waste. In addition, if the asphalt waste material is crushed before mixing with the hardening material and the particle size is made uniform within a certain range, for example, a particle size of 2 to 3 cm, the mixing property with the hardening material is improved and it is homogeneous. A high-strength molded product can be obtained.

Further, in the asphalt waste material molding of the present invention, cement-based powder and rubber-based viscous fluid can be used as a hardening material. By mixing cement-based powder and rubber-based viscous fluid with asphalt waste material,
Since the mixture becomes a viscous fluid, it has good moldability, and since these act as a strong binder for adhering the asphalt waste materials to each other, a high-strength asphalt waste material molded product can be obtained.

In this case, "Hozen material KH-MCA material (trade name)" sold by Bridge Repair Co., Ltd. is used as the rubber-based viscous fluid, and "Hozen material sold by Bridge Repair Co., Ltd. is used as the cement-based powder. KH-MCB material (trade name) "can be used. Since these are fast-curing and have an effect of strongly adhering the pavement material particles to each other, a high-strength asphalt waste material molded product can be formed in a short time.

Other hardening materials such as "Hozen material KH-PFC (trade name)" or "Hozen material KH-G (trade name)" sold by Bridge Repair Co., Ltd. can be used. .

In the asphalt waste material molded product of the present invention, a fiber material may be added to the asphalt waste material. By adding the fibrous material to the asphalt waste material, the fibrous material is cured in a state of being dispersed in the mixture, so that the strength of the asphalt waste material molded product is further improved. In this case, as the fiber material, in addition to metal fiber materials such as steel fiber,
Glass fiber, carbon fiber, silicon carbide fiber, synthetic resin fiber and the like can be preferably used.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a manufacturing process of an asphalt molded product according to the first embodiment, and FIG. 2 is a process explanatory view of the manufacturing process.

In this embodiment, an asphalt waste material molded product is manufactured by using asphalt waste material generated in repair work of an asphalt pavement surface as a raw material. As shown in FIG. 1, at a repair work site of an asphalt pavement surface to be repaired, a cutting device 1 that cuts according to the thickness of the pavement layer, and a paving material block A cut and removed by the cutting device 1 are used.
A crushing device 2 for crushing the pavement material mass A into pavement material particles B having an appropriate particle size, a transportation vehicle T for loading and unloading the pavement material particles B discharged from the crushing device 2, and the like. It is arranged.

Further, in a place away from the repair work site,
A high-speed rotating mixer 3 to which the pavement material particles B carried in by the transportation vehicle T are continuously charged and hardening materials S and G are supplied, conveyor devices 52 and 6 for transportation, and discharge from the mixer 3. A mold 20 and the like for arranging the recycled pavement material C thus formed into a molded product W having a constant shape are arranged. These devices can be installed inside a factory or the like, but can be a system that can be moved as needed.

The cutting device 1, the crushing device 2 and the like are arranged in the order shown in FIG. 1 and each have crawler belts 1a and 2a driven by respective driving devices. Can be moved. Further, between the crushing device 2 and the transport vehicle T, a conveyor device 51 having a crawler belt 5a that is independently driven is provided. Therefore, these devices can travel in a fixed direction in accordance with the movement of other devices. Further, the conveyor devices 52 and 6 disposed in front of and behind the mixer 3 have movable crawler belts 5a and 6a, respectively, and are movable.

The cutting device 1 is provided with a hopper 1b having a crawler belt 1a mounted at its lower end as a main body, and a rotary drive for forcibly peeling a pavement material on a pavement surface of a road at a constant depth on the bottom surface of the hopper 1b. The scraper 1c of the formula is provided. Further, inside the hopper 1b, there is provided a cutting device 1d for substantially quantifying the mass of the paving material from the scraper 1c and discharging it to the crushing device 2, and the paving material mass A discharged from the cutting device 1d is Belt conveyor type chute 1e
Can be released by.

The crushing device 2 is operated right below the chute 1e so as to run in synchronization with the movement of the cutting device 1, so that the paving material mass A discharged from the chute 1e is received. It is an open car,
Inside thereof, a pair of crushing rollers 2b for crushing the paving material mass A to have a predetermined particle size are provided. Then, as in the case of the cutting device 1, the pavement material particles B which have passed through between the crushing rollers 2b and have been granulated by crushing are quantified by the cutting device and discharged from the chute 2c, and the conveyor device It is loaded on the transport vehicle T via 51.

In the repair work on the asphalt pavement surface, as shown in FIG. 1, while the cutting device 1 is at the head and the crushing device 2 and the conveyor device 51 are moved at a constant speed along the road, In parallel, the cutting and removing work of the paving material lump A, the crushing work of the paving material lump A, and the work of loading the paving material granules B obtained by crushing the paving material lump A on the transport vehicle T are performed in parallel. You can

While the cutting device 1 is moving to the left side in FIG. 1, the asphalt layer is stripped from the pavement by the scraper 1c, and the hopper 1b is stripped off.
The paving material lump A collected in 1 is discharged from the chute 1e and charged into the crushing device 2.

By moving the crushing device 2 at substantially the same speed as the cutting device 1, the crushing roller 2 can be in a state of always receiving the paving material mass A from the chute 1e.
It is crushed by b so that the pavement material particles B have an appropriate particle size. Then, the pavement material grains B are loaded on the transport vehicle T from the conveyor device 5 that moves subsequently, and transported by the transport vehicle T to the installation location of the mixer 3.

The pavement material grains B carried in by the transport vehicle T are loaded into the mixer 3 via the conveyor device 52, in which the hardening material S, the hardening material G and the steel fiber R are added. , Mixing with the pavement material B is performed,
A recycled paving material C, which is a viscous fluid, is formed. In order to perform such mixing and stirring, a stirring blade 3b that rotates at a high speed is provided inside the mixer 3, and a cut-out valve or the like that discharges the mixed and stirred recycled paving material C to the conveyor device 6 side by a fixed amount is provided. ing.

The recycled paving material C formed in the mixer 3 is discharged from the mixer 3, conveyed by the conveyor device 6, and then filled in the mold 20. Then, after curing for a predetermined time, the molded product 20 can be obtained by demolding.

In this case, by changing the mixing ratio of the hardened material S and the hardened material G, the charging amount of the pavement material particles B, the rotation speed of the stirring blade 3b, etc., the recycled pavement material C obtained by the mixer 3 is condensed. Since the time can be adjusted and controlled, the manufacturing process can be set according to the size and shape of the molded product 20.

In this embodiment, "KH-MCA material" sold by Bridge Conservation Co., Ltd. can be suitably used as the hardening material S, and "KH-MCB material" can be suitably used as the hardening material G. Here, the "KH-MCA material" is a rubber-based viscous fluid, and the "KH-MCB material" is a cement-based powder.

As standard manufacturing conditions, a hardening material S of 6.4 kg and a hardening material G4 of 32 kg of pavement material particles B are used.
0 kg and 1.6 kg of steel fiber R were added, and a molded article W was manufactured using the regenerated paving material C formed by mixing and stirring in the mixer 3 for 2 minutes. At the time of 18.9-19.
It was possible to obtain a molded product W having a strength of 9 N / mm ² . It should be noted that these conditions can be appropriately changed according to the size and shape of the molded product W, and a step in which the steel fiber R is not added can be taken.

In addition, as a hardening material, a product name "Hozen material K" which is a polymer cement sold by Bridge Repair Co., Ltd.
It is also possible to use "H-PFC" and the product name "Hozen material KH-G" which is a super-rapid hardening type polymer mortar cement material sold by the same company.

Next, referring to FIGS. 3 and 4, the second embodiment of the present invention will be described.
An embodiment will be described. FIG. 3 is an explanatory view showing a manufacturing process of the asphalt molded product according to the second embodiment, and FIG. 4 is a process explanatory view of the manufacturing process.

In this embodiment, an asphalt waste material molded product is manufactured by using asphalt waste material generated in repair work of an asphalt pavement surface as a raw material. Although the steps are almost the same as those in the first embodiment, a sieving step by the sieving device 8 is provided before the mixing and stirring by the mixer 3.

The pavement material particles B discharged from the crushing device 2 and transported by the transport vehicle T are loaded into the sieving device 8 via the conveyor device 52, and in the sieving device 8,
The mud component is removed from the pavement material particles B by the sieve 8b provided inside, and at the same time, the pavement material particles P having a particle diameter of 2 to 3 cm and those having other particle diameters are selected.

The pavement material particles P thus selected are
Mixer 3 via chute 8a and conveyor device 53
In the mixer 3, the hardening material S, the hardening material G, and the steel fiber R are added to the pavement material particles P, and mixing and stirring are performed. Also in this case, the hardened material S and the hardened material G act as a binder for the pavement material particles P, whereby the recycled pavement material Q, which is a viscous fluid, is formed. In this case, steel fiber R
Is dispersed in the recycled pavement material Q and functions as a reinforcing material.

The recycled paving material Q formed by the above process is discharged from the mixer 3, filled in the mold 30 through the conveyor device 6, and cured for a predetermined time, and then demolded. Then, a molded product Z is obtained. In the case of the present embodiment, since the mud component is removed from the pavement material particles B, and the pavement material particles P having a uniform particle diameter of 2 to 3 cm are used,
It is possible to obtain a high-strength molded product Z. Even if the step of not adding the steel fiber R is adopted, it is possible to obtain a molded product having a strength that can be used as a block material or the like.

Also in the present embodiment, when mixing and stirring are performed in the mixer 3, the mixing ratio of the hardening material S and the hardening material G, the charging amount of the pavement material particles P and the steel fiber R, the mixing and stirring time, etc. are set. By adjusting, the setting time of the recycled pavement material Q formed in the mixer 3 can be controlled. Also in this embodiment, the "KH-MCA material" sold by Bridge Conservation Co., Ltd. can be suitably used as the hardening material S, and the "KH-MCB material" can be suitably used as the hardening material G.

Since the sizes and shapes of the molded products W and Z in the first and second embodiments are not particularly limited,
It can be adapted to various uses, and for example, construction materials such as flowerbed blocks and stake blocks can be formed.

[0037]

According to the present invention, the following effects can be obtained.

(1) A mixture of an asphalt waste material obtained by cutting and removing an asphalt pavement layer and a hardening material is molded into a certain shape and hardened, so that the hardening material acts as a binder for adhering the asphalt waste materials to each other. Therefore, even if the asphalt waste material contains a mud component or the like, it is possible to obtain a molded product having sufficient strength as various construction materials such as a flowerbed block and a stake block after curing. Further, since the asphalt waste material containing the mud component is used, no waste is generated, and it is not necessary to dispose of industrial waste.

(2) By using the cement-based powder and the rubber-based viscous fluid as the hardening material, the mixture of these and the asphalt waste material becomes the viscous fluid, the moldability becomes good, and the asphalt Since it acts as a strong binder for adhering waste materials together, a high-strength asphalt waste material molded product can be obtained.

(3) By adding the fibrous material to the asphalt waste material, the fibrous material is cured in a state of being dispersed in the mixture, so that the strength of the asphalt waste material molded article can be further improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a manufacturing process of an asphalt molded product according to a first embodiment.

FIG. 2 is a process explanatory view of the manufacturing process shown in FIG.

FIG. 3 is an explanatory diagram showing a manufacturing process of an asphalt molded product according to a second embodiment.

FIG. 4 is a process explanatory view of the manufacturing process shown in FIG.

[Explanation of symbols]

1 cutting device 1b hopper 1c scraper 1d cutting device 1e, 2c, 8a shoot 2 crusher 1a, 2a, 3a, 4a, 5a, 6a Tracks 2b Crushing roller 3 mixer 3b Stirring blade 6,51,52,56 Conveyor device 8 Screening device 8b sieve 20,30 formwork A paving material block B, P Pavement material grain C, Q recycled pavement material S, G hardening material R Steel fiber T transport vehicle W, Z molded products

Claims (3)

[Claims] 1. A molded article of asphalt waste material, characterized in that a mixture of an asphalt waste material obtained by cutting and removing an asphalt pavement layer and a hardening material is molded into a certain shape and cured. 2. The asphalt waste material molded product according to claim 1, wherein the hardening material is a cement-based powder and a rubber-based viscous fluid. 3. The asphalt waste material molded product according to claim 1, wherein a fiber material is added to the asphalt waste material.