JPS60164595A - Destruction method utilizing heat insulating 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 The present invention relates to a destruction method for destroying objects to be crushed by the expansion pressure generated by kneading an expanding crushing agent and water. This invention relates to a destructive method that can crush objects in a short amount of time.

Generally, expandable crushing agents containing calcium oxide (Cab) as a main component are widely used for demolition and crushing of concrete structures, rocks, and earth.

That is, the water expansion pressure generated by the reaction between CaO and water is used to destroy concrete structures and rocks, but on the other hand, the hydration of GaO.

If the reaction progresses rapidly, a blowout phenomenon may occur due to a sudden rise in the slurry temperature due to heat generation, which is dangerous and will result in a loss of crushing effect, so such a blowout phenomenon should not occur. Under certain conditions, slurry or wet cake is filled and crushed.

However, the higher the temperature of CaO, the more the water utilization reaction is promoted.
Although the rate of development of expansion pressure becomes faster, it also makes it easier to cause eruption phenomena, and it takes a long time of half a day or - days to destroy the material to be crushed while suppressing such eruption phenomena. There was a drawback that it was difficult to use.

To deal with these drawbacks, we have taken advantage of the temperature rise caused by the heat of hydration to fill an expansive crushing agent under conditions that cause an eruption phenomenon, and then used ultra-rapid hardening cement or a material with comparable performance. tamping fast-setting cement paste, mortar, or concrete;
A destructive method has been proposed that can crush objects in a short time of 1 to 5 hours.

However, even with this type of destruction method, in order to suppress the eruption phenomenon and shorten the time required for crushing, various conditions such as the temperature of the object to be crushed, the outside air temperature, and the diameter of the hole drilled must be adjusted. The components and particle size of the expansible crushing agent must be adjusted accordingly, and there is a problem in that many types of expansible crushing agents with their ingredients etc. must be prepared in advance at all times.

In other words, in the destructive construction method using an expanding crushing agent,
Since expansion pressure is developed by the water utilization reaction of calcium oxide, which is the main component of the expandable crushing agent, the rate of expansion pressure development changes significantly depending on the temperature of the material to be crushed, the outside air temperature, etc. For example, crushing is difficult at low temperatures because the expandable crushing agent cannot react sufficiently, and in order to carry out crushing work within a specified time under any environment, it is necessary to use a wide variety of materials with adjusted ingredients. The disadvantage of this method is that it is extremely complicated, as it is necessary to prepare an expandable crushing agent in advance, select it appropriately depending on the season, work site conditions, and temperature environment, and then use it for the destruction work.

The present invention has been developed in view of these conventional drawbacks, and its purpose is to safely and quickly destroy objects without being affected by the conditions and temperature environment of the destruction work site. The purpose is to provide a destructive construction method that enables crushing.

In order to achieve this object, the present invention mixes an expansible crushing agent with water to destroy reconcrete structures, rocks, etc. by the expansion pressure generated by the reaction with water, and forms a slurry or wet material. In a destruction method in which the cake is filled into a hole in an object to be crushed and the object is crushed by expansion pressure, the inside of the hole is made of a material that has heat insulating properties.

The expandable crushing agent slurry or wet cake is inserted into the cylinder and the expandable crushing agent slurry or wet cake is filled in the cylinder to reduce the dissipation of reaction heat of the expandable crushing agent slurry or wet cake. It is configured to accelerate the reaction and crush the material to be crushed.

The present invention will be explained in detail below. First, in the first invention, a cylindrical body or a hollow polygon made of a material having heat insulating properties is inserted into a hole drilled in a material to be crushed and arranged as a heat retention means, and an expandable body is formed inside the cylinder or hollow polygon. A crushing agent slurry is filled to reduce the dissipation of reaction heat of the expansive crushing agent slurry or wet cake, and the object to be crushed is crushed. In this case, the materials having heat insulating properties include plain paper, Synthetic resins such as vinyl chloride, hardened cement products, metals, non-ferrous metals (thick enough to prevent the deterioration of the destructive power of the expansible crushing agent), etc. are used, and their shapes are circular in cross section or A cylindrical body or a hollow polygon having a polygonal cross section is used. In addition, in the second invention, heating the expandable crushing agent slurry or wet cake filled in such a cylinder or hollow polygon,
The material to be crushed is crushed by accelerating the reaction of the expandable crushing agent slurry or wet cake. Possible methods include adding water and using the heat generated as a result of the hydration reaction, and using heat generated by a chemical reaction, such as using a gas burner.

Next, the first invention will be explained in detail. As shown in FIG.
℃ in advance, a hole 2 with a diameter of 4 hm and a length of He is bored in the concrete specimen 1, and a cylinder 3 made of cardboard with an outer diameter of 35 mm and a thickness of 111 m is inserted into the hole 2. The cylinder 3 is filled with S-mite slurry 4 (expandable crushing agent slurry manufactured by Sumitomo Cement Co., Ltd., S type, applicable temperature 5 to 20°C) with a water/disrupting agent ratio of 25%. .

As a result, cracks occurred 8 hours after filling, and it was possible to fracture 12 hours after filling.

For comparison, a similar crushing experiment was conducted on a sample without a pole paper tube inserted, but cracks appeared 24 hours after filling the slurry, and it was possible to crush it 30 hours later.

Next, the second invention will be explained in detail. As shown in Figure 2,
- Place the unreinforced concrete specimen 1 formed with sides 1 in a constant temperature room at a room temperature of θ℃, and the concrete specimen 1 is placed at 0℃
The concrete specimen 1 is cooled in advance until it becomes
A hole 2 with a diameter of 40 mm and a depth of 80 cm is drilled in the hole 2.
A cylinder 5 made of vinyl chloride with an outer diameter of 35 mm and a thickness of 1.5 cm is fitted inside the cylinder 5, and S with a water/disintegrating agent ratio of 25% is placed inside the cylinder 5.
- Mite Slurry 4 (static crushing agent slurry manufactured by Sumitomo Cement Co., Ltd.) was filled in hole 2, leaving a length of 10 cm above the hole. As a result, cracks occurred 5 hours after the completion of filling, and it was possible to crush the container 12 hours later.

Similarly, S-mite slurry 4 with a water/disintegrating agent ratio of 25% was filled into the cylinder, leaving a 10 cm length at the top of the hole 2, and quicklime 6 was added into the 10 cm long section at the top of the hole 2. It is made by pouring 20% water to 6 parts quicklime. As a result, cracks appeared after 20 minutes, and it was possible to fracture after 1 hour.

In addition, for comparison, a crushing experiment was conducted using a conventional method in which a vinyl chloride cylinder was not inserted and quicklime was not added, but it took 12 hours for cracks to occur, and it was not possible to crush after 15 hours. Ta.

In the embodiment according to the second invention, the +W tensile crushing agent slurry is heated using heat generated by a chemical reaction, but the present invention is not limited thereto. In this example, the case where heating is performed using the heat generated when water is added to quicklime has been taken as an example. However, the present invention is not limited to this example. At least one of these may be used, as long as it utilizes heat generated by a chemical reaction. Furthermore, it may be possible to utilize heat from any one of a heating wire, a gas burner, a torch burner, and a bonfire. Further, in the embodiment according to the second invention, a case has been described taking as an example a case in which a cylinder made of a material having heat insulating properties is formed into a cylindrical shape, but the form of the cylinder is not limited to the above embodiment.

As described above, the first invention is configured to reduce the dissipation of reaction heat of the expandable crushing agent slurry or wet cake filled into the object to be crushed, and therefore is affected by the temperature environment of the destruction work site. You can perform crushing work without
In particular, it is possible to easily and quickly destroy objects to be crushed even under low temperature conditions such as in the middle of winter or in cold regions. It is no longer necessary to prepare a crushing agent in advance and select and use it depending on the season and work site environment, reducing the number of preparation steps for crushing work. Moreover, in the second invention, the expandable crushing agent slurry or the wet cake is heated from the upper part, and can be crushed in a shorter time. Furthermore, the hydration reaction is gradually promoted from above to the bottom of the expandable crushing agent slurry filled in the holes made in the object to be crushed, and the area where the hydration reaction has occurred hardens and becomes a type of Since it is formed as a porous plug, the steam generated by the subsequent hydration reaction is not blocked, preventing the blowout phenomenon, and making it possible to perform crushing operations safely. It is something.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment according to the first invention, and FIG. 2 is an explanatory diagram showing an embodiment according to the second invention. l...Object to be crushed 3.5... Cylinder 2... Hole

Claims (4)

[Claims] (1) A hole is opened in the object to be crushed in the form of a slurry or wet cake mixed with water and an expansive crushing agent that destroys concrete structures, rocks, rocks, etc. due to the hydration expansion pressure generated by reaction with water. In the first stage of fracture, in which the material to be crushed is crushed by the expansion pressure, a cylinder or hollow polygon made of a material having heat insulating properties is inserted into the hole, and an expandable crushing agent slurry or a wet cake is placed inside the cylinder. A heat insulating material filled with the following materials to reduce the dissipation of reaction heat of the expandable crushing agent slurry or wet cake, promote the reaction of the expandable crushing agent slurry or wet cake, and crush the object to be crushed. The destructive method used. (2) The expandable crushing agent slurry or wet cake is heated by heat generated by a chemical reaction or electrically, a gas burner, a torch burner, or a bonfire. Destructive construction method using insulation material. (3) In a destruction method in which an expansive crushing agent that destroys concrete structures, rocks, etc. is destroyed by hydration expansion pressure generated by reaction with water, is mixed with water and the object to be crushed is crushed in a slurry state or a wet cake state, A cylindrical body made of a material having heat insulating properties is inserted into the hole, and the expandable crushing agent slurry or wet cake is heated from the hole opening to promote the reaction of the expandable crushing agent slurry or the wet cake, and to crush the crushing agent slurry or wet cake. A destructive construction method that uses insulation material and is characterized by crushing objects. (4) J2 The expandable crushing agent slurry or wet cake is heated by heat generated by a chemical reaction or electrically, a gas burner, a torch burner, or a bonfire. Destructive construction method using the insulation material described in Section 3.