JPS58185459A - Element fixing capsule - 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 cuff cell 1e used when fixing an element such as an anchor bolt or a lock bolt in a drilled hole.

Conventionally, this type of capsule was produced in Japanese Patent Application Laid-open No. 54-544.
As described in Japanese Patent Application No. 22, a container in which Portland cement is stored in a water-permeable container such as paper is known. However, this capsule had the drawbacks of poor acid resistance and durability at high temperatures, and low fixing strength.

As a result of various studies aimed at solving this drawback, the present invention discovered that it is sufficient to use a binder containing granulated blast furnace slag and an alkaline stimulant. It is a completed invention.

That is, the present invention is a capsule for fixing an element in which a binder containing granulated blast furnace slurry powder and an alkaline stimulant is housed in an aqueous container.

Hereinafter, the present invention will be described in detail. The material of the water-permeable container constituting the capsule is preferably one that is water-permeable and breaks into the container, such as paper, fiber, cloth, and IF-pore plastic. The shape of the container can be freely selected, such as bag-like, cylindrical, or prismatic, and there are no restrictions on its size. In other words, normally in tunnel construction etc., the outer diameter is 20 to 50 m and the length is 150 to
500 cm, and those with an outer diameter of 10 to 20 m and a length of 50 to 150 cm are used in machine installation work, etc., and the present invention is not limited to these shapes in any way. It's not something you can do.

The binder contained in the container contains granulated blast furnace slag powder and an alkaline stimulant.

The fineness of the granulated blast furnace slag is preferably 5,000 cm"/or less, particularly 5,000 to 8,000 cm"/
By setting m5/P, a balance between strength and grinding economy can be achieved, and if it exceeds 8,000 cm515',
[It's not impossible to use it, but it will cause more shrinkage.] Furthermore, slag with a vitrification rate of at least 90% or more exhibits excellent strength.

Since granulated blast furnace slag powder alone will not harden, it is necessary to use it in combination with an alkaline stimulant.

The amount used is preferably 1 to 60 parts by weight, particularly 2 to 15 parts by weight per 100 parts by weight of granulated blast furnace slag powder. Examples of alkaline irritants include alkali hydroxides such as sodium hydroxide and potassium hydroxide, alkali carbonates or bicarbonates such as sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate, sodium silicate, and the like. can give. Among these, the combined use of an alkali hydroxide and an alkali carbonate or hydrogen carbonate has the advantage that long-term strength development can be enhanced, resulting in firm fixation. Alkaline stimulant silkworm
When Jnl fracture is less than 1 layer, the strength development effect is small,
Moreover, even if the thickness exceeds 504 parts, the strength will not increase significantly, so it is not practical. The alkaline stimulant may be used after being dissolved in water, or may be preliminarily mixed with the granulated blast furnace slag powder.

In addition, the fixing strength can be further increased by mixing a cement water reducing agent, a cement expanding agent, etc. with the binding material according to the present invention. As the cement water reducing agent, it is preferable to use a type B called a high performance water reducing agent, specifically, one based on naphthalene sulfonate formalin condensate, one based on urea resin, and one based on lignin sulfonate. can be given. Further, as the cement expanding material, calci-〈horn-→L-sulfoaluminite-based, lime-based, calci-aluminated, and mixture-based materials of aluminate and inorganic #L salts can be used at one cost. Furthermore, the fixing strength can be increased by adding small pieces of a highly water-absorbing polymer, such as the product name Aqua Keep J (manufactured by Al1-Tetsu Kagaku Kogyo Co., Ltd.).

In order to fix an element using the capsule of the present invention, the capsule, which has been previously immersed in water and absorbed, may be placed in a punched hole, and the element may be pushed in to destroy the container. In addition, the capsule may be reinforced with an easily breakable net-like or lattice-like protector in order to facilitate handling.The effects of the capsule of the present invention are as follows. .

1) Reinforcing bars are not corroded.

2) The hydrate has no slaked lime, or even if it does, it is in a very small amount, so it is acid resistant.

'5) Since it hardens just by absorbing water, there is no need to rotate the element, and therefore no machining of bolts is required, making it extremely economical.

4) Strong fixing strength even at high temperatures of 2000°C or higher,
Practical up to 00C.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 6.500 cm of brane with the chemical composition shown in the table below
”/V granulated blast furnace slurry powder 1004: 1 part of 10 tons of powdered hydroxide Ihinatri °Tsum is mixed in the pupil part as a binder,
Pack carp 1 into a Japanese paper bag with outer diameter 20-〆x150m (86
F/Book) I created a cover sheet.

7) Drill a hole with an inner diameter of 24 mm x depth of 550 mm in concrete with a compressive strength of 370 kl f/m2, fill the hole with 10 cc of water, push the capsule, and immediately make a hole with a diameter of 20 mm x length. A 550 wm deformed reinforcing bar was hammered in with a hammer. After 1 day, the fixed specimen was immersed in a 250C oil bath and cured for 1 day, after which a pull-out test was conducted using a center hole junk. The result was 12 tons. (1)
(The bolt broke in one hit.

Similarly, capsules were prepared and tested by separately adding 5 parts of sodium carbonate, sodium bicarbonate, and powdered sodium silicate to the binder.

As a result, all cured in a short time of 2 hours.

After 6 hours, they were immersed in an oil bath for 1 hour and a pull-out test was performed, and the bolts were broken after a load of 12 tnn.

For comparison, a similar test was conducted using Mackerel/Ichi Holtolan I/cement and a commercially available resin-based fixing material as binding materials, and the holt was removed under loads of 21 On and 51 On, respectively.

Patent applicant: Electrochemical 2'U-Gyo Co., Ltd. = 307-

Claims (1)

[Claims] A capsule for fixing an element, which is formed by storing a binder containing granulated blast furnace slag powder and an alkaline stimulant in a water-permeable container.