JPH0534455B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for efficiently processing demolished concrete generated by demolition of a concrete structure by recycling demolished concrete.

"Conventional technology and its problems" When a concrete structure is demolished, a large amount of demolished concrete material is generated.

Traditionally, when disposing of such demolished concrete materials, most of the demolished concrete materials were dumped in a landfill, but due to severe restrictions such as location, quantity, and size, demolition work could be done more smoothly. I'm getting to the point where I can't do it anymore. Now that the number of large-scale demolition works for concrete structures, such as redevelopment work and the demolition of nuclear power plants, is expected to increase, there is a desire to develop treatment methods that rely on reuse as an alternative to landfilling and dumping.

As a processing method through reuse, it is possible to use part of the demolished concrete as aggregate, but if the demolished concrete is used as aggregate, the demolished concrete can be used as aggregate by a crusher, etc. It cannot be used unless it is crushed to a size that can be used and then classified according to particle size. Therefore, there is a problem that the cost is high and the recycled aggregate becomes relatively expensive. Even if the demolished concrete material is recycled as aggregate in this way, there is a problem in that the concrete constructed using the aggregate has relatively low strength, so its uses are limited.

This invention was made in view of the above circumstances, and aims to efficiently dispose of demolished concrete materials generated by demolishing concrete structures by reusing them.

``Means for Solving the Problems'' The method of reusing demolished concrete according to the present invention involves mixing the demolished concrete produced from the demolition of a concrete structure with mortar in its original state with foreign objects removed. The material is solidified and reused as the foundation for newly constructed structures.

``Example'' Hereinafter, an example of the present invention will be described as shown in FIGS.
This will be explained with reference to c and d.

The method of reusing demolished concrete materials in this example involves excavating the foundation ground in the land adjacent to the nuclear power plant that has reached the end of its service life, and dismantling the nuclear power plant. Artificial rock for a nuclear power plant is newly constructed on the foundation ground by pouring concrete into the foundation ground with foreign objects removed, and then injecting mortar into the foundation ground and solidifying it. (foundation).

When disposing of demolished concrete generated from the demolition of a nuclear power plant using such a processing method, first, as shown in Figure 1a, the area adjacent to the building 1 of the nuclear power plant that has reached the end of its service life is Then, as shown in FIG. 1b, the building 1 is demolished, and demolished concrete material 3 generated by the demolition is poured into the foundation ground 2 and spread evenly. After the demolished concrete material 3 is leveled on the foundation ground 2 in this way, concrete is constructed on this foundation ground 2. In this case, as shown in FIG.
The mortar 5 manufactured by the method is injected into the demolished concrete material 3 through a mortar injection pipe 7 using a mortar pump 6.

Here, a method of constructing concrete on the foundation ground 2 and an example using the prepacked concrete construction method will be explained with reference to FIGS. 2a, b, and c.

First, as shown in FIG. 2a, the mortar injection pipe 7 is inserted into the demolished concrete material 3, and then, as shown in FIG. 5, and as shown in Fig. 2c, after removing the mortar injection pipe 7, the top of the concrete is leveled to complete the pouring.

After forming an artificial bedrock (foundation) 8 as shown in FIG. 1d on the foundation ground 2 in this way, a new nuclear power plant building 9 is constructed on this artificial bedrock 8, and Leveling the site of the demolition of Building 1.

Next, an example of using the post-packed concrete construction method as a method of constructing concrete on the foundation ground 2 will be explained with reference to FIGS. 3a, b, and c.

First, as shown in Fig. 3a, mortar 5 is placed on the foundation ground 2, and then, as shown in Fig. 3b, demolished concrete material 3 is poured into this mortar 5, and after compaction. , as shown in Figure 3c,
Finish pouring by leveling the top of the concrete.

"Effects of the Invention" According to the method of reusing demolished concrete materials of the present invention, demolished concrete materials generated from the demolition of concrete structures are mixed with mortar in the same state from which foreign substances have been removed, and the mixture is solidified. Since the concrete is reused as the foundation of a newly constructed structure, it is possible to secure a suitable place to dispose of the demolished concrete, which makes it possible to easily and inexpensively dispose of the demolished concrete. Concrete material can be effectively used as the foundation of a newly constructed structure.

[Brief explanation of the drawing]

1 to 3 are diagrams showing a first embodiment of the present invention, in which FIG. 1 is an explanatory diagram illustrating a processing method by reusing demolished concrete materials, and FIG.
The figure is an explanatory diagram for explaining the pre-packed concrete construction method, and FIG. 3 is an explanatory diagram for explaining the post-packed concrete construction method. 1...Concrete structure (nuclear power plant building that has reached the end of its service life), 3...Dismantled concrete material,
5...Mortar, 8...Foundation (artificial rock), 9...
...Newly constructed structures (buildings for new nuclear power plants).

Claims (1)

[Claims] 1. Demolished concrete, which is characterized by mixing demolished concrete material generated from the demolition of a concrete structure with mortar in its original state with foreign matter removed, solidifying it, and reusing it as the foundation of a newly constructed structure. Processing method by recycling materials.