JPH0458521B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for manufacturing a road base material using concrete waste materials and the like.

[Conventional technology and problems]

In recent years, with the development of concrete buildings, the proportion of concrete used has increased dramatically compared to wood, etc., but the service life of concrete buildings is
It is said that it has been 60 years since then, but even before that, large amounts of concrete waste was generated from demolishing and rebuilding due to deterioration. Conventionally, these concrete waste materials were illegally dumped in landfills or vacant lots. However, such illegally dumped concrete waste destroys the natural and living environments, and becomes a dangerous playground for children, posing a major social problem.

[Purpose of the invention]

In view of the above-mentioned conventional drawbacks, the present invention separates concrete, reinforcing wood, etc. from the waste materials of these concrete buildings, and uses the classified concrete waste materials as road base material, thereby improving strength and service life. It is an object of the present invention to provide a manufacturing device for a roadbed material for manufacturing a roadbed material.

[Key points of the invention]

In order to achieve the above-mentioned object, the present invention provides a crushing and sorting means for crushing and sorting concrete waste material from waste materials consisting of concrete, reinforcing bars, and wood into small particle sizes, and a concrete waste material and residual concrete that are sorted by the crushing and sorting means. and a mixing means for mixing stone powder of land-based coral reef coalstone.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a sectional view of an asphalt paved road using the roadbed material of the present invention. In the figure, 1 is the roadbed material of the present invention, 2 is the upper road, 3 is asphalt, 4 is the guardrail,
5a and 5b are side gutters. Moreover, the score indicates the cross section of the original terrain 6 before it is made into an asphalt paved road.

Normally, in order to create such an asphalt paved road, the original topography 5 is first cut or filled and compacted using a large trailer to create a compacted horizontal ground.
(Actually, there is a slight slope in order to provide a 2% slope from the center 7 of the road to the side gutters 5a and 5b on both sides for drainage of rainwater, etc.) On this compacted ground, a predetermined design thickness, For example, the roadbed material 1 is leveled to 30 cm using a grader, and further compacted by rollers to compact the roadbed material 1. Next, the upper roadbed 2 crushed to the required particle size is rolled onto the roadbed material 1 using rollers to a predetermined design thickness of, for example, 50 cm, and asphalt (surface roadbed) is laid on top of it and rolled with rollers. This is for finishing.

The components of the roadbed material 1 used for the asphalt paved road having the above structure are composed of concrete waste, residual concrete, and coral produced by the roadbed material manufacturing apparatus of the present invention.

Coral here refers to coral reefrocks, which are marine coal rocks. It is composed of fine particles (coal powder) and large-diameter lumps, commonly called ``Ishigu''. It is called coral because it means a rock made of coral reefs. Furthermore, residual concrete refers to the remains of concrete mixed with crushed stone, sand, and cement in appropriate proportions, that is, the crushed stone and sand left after cement is washed away from returned ready-mixed concrete or returned concrete.

Concrete waste is mixed with such coral and residual concrete at a ratio of 2 parts coral and 2 parts concrete waste to 6 parts concrete waste. In addition, the particle size of residual concrete is less than 20 mm, and the particle size of concrete waste is
The material used is crushed into pieces of 40 mm or less.

Next, from concrete waste material as mentioned above, particle size 40
The apparatus for producing blocks of concrete less than mm in size will be described below.

FIG. 2 shows the device, and FIG. 4 shows the process diagram. 8 is a hopper into which large chunks of concrete are sorted from building waste materials, 9 is a geocrusher that crushes large chunks of concrete, 9a is a sorter that sorts concrete chunks, and 10 is a particle size of 40 mm or less. 11 is a belt conveyor, and 12 is a container that holds all the concrete waste material in particle size.
This is a roll crusher for crushing concrete into lumps of 40 mm or less, and 13, like 10, is a container for containing concrete lumps with a particle size of 40 mm or less.

When a large lump of concrete waste obtained by removing reinforcing bars, wood, etc. from building waste or all small particle diameter concrete waste from the concrete waste is put into the hopper 8 of a crushing plant with such a configuration, a vibrating feeder is placed. Large concrete lumps are crushed by a geocrusher 9 via a sieve 8a, and concrete lumps with small particle diameters are collected in a container 10 via a sorter 9a. Here, sorting machine 9
By setting the particle size to be sorted in a to 40 mm or less, only concrete waste with a particle size of 40 mm or less can be taken out. Concrete waste having a particle size of 40 mm or more is conveyed to a roll crusher 12 by a belt conveyor 11. Roll crusher 12
Concrete waste material with a particle size of 40 mm or more transported to is sandwiched between rolls 12a and 12b with a width of 40 mm constituting the roll crusher 12, and is crushed to drop concrete waste material with a particle size of 40 mm or less into a container 13, The container 13 is loaded onto a dump truck (not shown) or the like.

The concrete waste produced as described above is transported to a mixing plant for mixing roadbed material 1 shown in FIG. 3, and processed through the steps shown in FIG. 5. In the figure, 14 is a hopper into which materials for each roadbed material 1 are placed, 14a is a hopper for coral, 14b is a hopper for remaining concrete, and 14c is a hopper for concrete waste with a particle size of 40 mm or less. Also, at the bottom of each hopper 14a, 14b, 14c, there is a measuring device 16 for measuring the weight of each material and dropping a certain amount of material onto the belt conveyor 15.
a, 16b, and 16c are provided, respectively. Further, 17 is a belt conveyor, which conveys the material that has fallen onto the belt conveyor 15 to a mixer 18, and the mixer 18 is a device for sufficiently stirring the three types of materials of the above-mentioned roadbed material 1. .

Coral, residual concrete with a particle size of 20 mm or less, and concrete waste with a particle size of 40 mm or less are respectively put into the hoppers 14a, 14b, 14c of the mixing plant having such a structure, and the measuring devices 16a, 16b, 16c are placed.
, each measuring instrument 16a, 16b, 1
A predetermined weight of coral, residual concrete, and concrete waste can be dropped per unit time onto the belt conveyor 15 located at the bottom of the roadbed 6c. Materials can be set. The material for the roadbed material 1 placed on the belt conveyor 15 is sent above the mixer 18 and delivered by dropping into the mixer 18, and after being thoroughly mixed in the mixer 18, it is delivered to the mixer outlet. From 18a, it is loaded onto a truck (not shown), transported to a road construction site, and used as a roadbed material 1 for an asphalt-paved road.

Therefore, the roadbed material 1 of the present invention is made by sufficiently mixing coral, residual concrete, and concrete waste in a mixing plant configured as described above, and the roadbed material 1 has a mixing ratio that is lower than that of conventional roadbed materials. It has excellent dryness, density, and strength.

Note that the embodiments of the present invention are not limited to the above, and even if an asphalt-paved road does not necessarily use the upper roadbed 2 as shown in FIG. 1, the roadbed of the present invention may be applied depending on the design conditions. Of course, it is possible to use the roadbed material 1 manufactured by a material manufacturing device.

Further, the number of hoppers 14 is not limited to three, but four may be provided as spares or depending on the difference in usage, and the same material may be placed in two hoppers 14 for use.

〔Effect of the invention〕

As explained in detail above, according to the present invention, waste materials from concrete buildings, which have caused social problems such as destruction of the natural environment, can be mixed with coral and residual concrete and used as a roadbed material for asphalt-paved roads. By providing a manufacturing device for roadbed material that makes it possible to effectively and reuse concrete waste, it is possible to use a roadbed material that is mixed at a ratio of 6 parts of concrete waste to 2 parts of coral and 2 parts of residual concrete. Asphalt-paved roads have better drainage, density, and strength than conventional roads.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an asphalt paved road using the roadbed material of the present invention, FIG. 2 is a block diagram of a crusher plant, and FIG. 3 is a block diagram of a mixing plant. FIG. 4 is a process diagram of the present invention. FIG. 5 is also a process diagram of the present invention. 1... Roadbed material, 2... Upper roadbed, 3... Asphalt, 4... Guardrail, 5a, 5b... Gutter, 6... Terrain, 7... Center, 8, 14... Hopper, 9... Jyo crusher , 9a... Sorting machine, 10, 13... Container, 11, 15, 17...
Belt conveyor, 12...Roll crusher, 1
4a... hopper for coral, 14b... hopper for residual concrete, 14c... hopper for concrete waste, 18... mixer, 18a... discharge port.

Claims (1)

[Scope of Claims] 1. A crushing and sorting means for crushing and sorting concrete waste material among waste materials consisting of concrete, reinforcing bars, and wood into small particle sizes, and concrete waste materials, residual concrete, and land-based materials sorted by the crushing and sorting means. 1. An apparatus for manufacturing a roadbed material, comprising a mixing means for mixing coral reef coal rock with stone powder. 2. A patent characterized in that the mixing ratio for mixing concrete waste, residual concrete, and onshore coral reef coal rock stone powder by the mixing means is 6 parts of concrete, 2 parts of remaining concrete, and 2 parts of onshore coral reef coal rock stone powder. An apparatus for manufacturing a roadbed material according to claim 1.