JPS61183505A - Road foundation material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a road base material using concrete waste or the like.

[Prior art 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 useful life of concrete buildings is said to be 60 years, but even before that, they tend to deteriorate due to aging. Many buildings are being demolished due to industrialization, and concrete waste used in buildings is being generated during rebuilding. 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 bars, wood, etc. from the waste materials of these concrete buildings and uses the classified concrete waste materials as a road base material.

The object of the present invention is to provide a roadbed material with excellent strength and durability and a method for manufacturing the same.

[Key points of the invention]

In order to achieve the above-mentioned object, the present invention provides a roadbed material which is made by blending leftover concrete and uplifted coral reef limestone stone powder with leftover materials after sorting waste materials consisting of concrete, reinforcing bars, and wood.

[Embodiments of the invention]

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

FIG. 1 is a cross-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, and 4 is the guardrail.

5a and 5b are side gutters. Moreover, the two-dot line shows the cross section of the original terrain 6 before it is made into an asphalt paved road.

To build such an asphalt paved road.

First, the original topography 6 is cut or filled, compacted and compacted using a large trailer to form a horizontal ground.Actually, 2% of the ground is laid from the center 7 of the road to side ditches 5a and 5b on both sides for drainage of rainwater, etc.
The roadbed material 1 of the present invention is leveled on this compacted ground to a predetermined design thickness using a grader, and is further compacted by rolling with rollers. carry out the work; Next, on the roadbed material 1, the upper roadbed 2, which has been crushed to the required particle size, is rolled with rollers to a predetermined design thickness, and asphalt (surface roadbed) is laid on top of it.
Rolling finish is performed using rollers.

The component of the roadbed material of the present invention used for asphalt pavement with the above structure is concrete waste.

It is made up of residual cone and coral.

Here, coral refers to coral reef flock (cora
reefrocks), which refers to limestone on the ocean floor. It is commonly called ``Ishigu'' and is composed of fine particles (calcareous powder) to large-diameter lumps. 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.

Coral 2. Concrete waste materials such as Coral and remaining concrete. It is mixed at a ratio of 2 parts concrete waste to 6 parts concrete waste. The particle size of the remaining concrete is 20 m or less, and the concrete waste is crushed to a particle size of 40 m or less.

To create concrete waste with a grain size of 40w or less as described above, the concrete waste is sorted by a video feeder, and the concrete waste with a grain size of 40m or less is transported to be used as roadbed material 1. Concrete waste is conveyed by a belt conveyor, crushed into concrete waste of 40 ts or less by a roll crusher, and conveyed to a mixing device (mixing plant) to be used as roadbed material 1 in the same manner as described above.

The mixing device has a hopper into which the above-mentioned concrete waste with a particle size of 40W or less is put, a hopper into which coral is put, and a ho-sober into which the remaining concrete is put, and there is a conveyor belt at the bottom of each hopper to the mixer. Coral at a specified capacity per unit time.

By dropping the remaining concrete and concrete waste, Coral 2. Remaining con 2. The material of the roadbed material 1 can be set to the ratio of concrete waste material.

The material of the roadbed material 1 placed on the conveyor belt is sent above the mixer and delivered by dropping it into the mixer,
After being thoroughly mixed in the mixer.

Transported to road construction sites by trucks, etc.

Therefore, 1. The roadbed material 1 of the present invention is made by sufficiently mixing coral, residual concrete, and concrete waste using a mixer, and the roadbed material 1 with this mixing ratio has a dryness level 1 and strength compared to conventional roadbed materials. It is excellent.

The third embodiment of the present invention is not limited to the above.

Even if an asphalt-paved road does not necessarily use the upper roadbed 2 as shown in FIG. 1, it is of course possible to use the roadbed material 1 manufactured by the roadbed material manufacturing apparatus of the present invention depending on the design conditions. It is.

[Effects of the Invention] As explained in detail above, according to the present invention, asphalt-paved roads can be made by blending waste materials from concrete buildings, coral, and residual concrete, which have caused social problems such as destruction of the natural environment. By using it as a roadbed material, it can be effectively and reused, and moreover, it is possible to use coral 2. An asphalt paved road using a roadbed material mixed with 2 parts of residual concrete has superior drainage performance and strength compared to conventional roads.

[Brief explanation of drawings]

The figure is a cross-sectional view of an asphalt-paved road using two roadbed materials of the present invention. 1... Roadbed material 2... Upper roadbed 3... Asphalt 4... Guardrails 5a, 5b... Gutters 6... Terrain 7... Center

Claims (2)

[Claims] (1) A roadbed material characterized by being made by mixing leftover concrete and uplifted coral reef limestone stone powder with leftover materials after sorting waste materials consisting of concrete, reinforcing bars, and wood. (2) The roadbed material according to claim 1, wherein the remaining material is concrete.