JPH0455600A - Bolt-fixing inorganic capsule - Google Patents

Abstract

PURPOSE:To stabilize fixing force of bolts by a method in which in forming a bolt-fixing inorganic capsule composed of cement housed in a container and a hardener separated from the cement, the grain size of the cement is regulated to be within a specific value. CONSTITUTION:In a bolt-fixing capsule composed of cement housed in a container and a hardener separated from the cement in the container, the grain size of the cement is regulated to be within the range of 0.01-10mm. A glass inner container 2 confined with a compressed cement molding or its crushed material is housed in a glass outer container confined with a hardener 4. The packing stability of the capsule can thus be greatly improved, and highly stable fixing force can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an inorganic bolt fixing capsule for fixing an anchor bolt to concrete, rock, etc.

[Conventional technology]

Conventionally, as a method for fixing anchor bolts to concrete, etc., a capsule made by separating and accommodating a thermosetting resin and its curing agent is loaded into a hole drilled in concrete, etc., and the anchor bolt is inserted into a container while rotating. A method (Japanese Patent Publication No. 38-12863) was adopted in which the anchor bolts were fixed by crushing the anchor bolts and curing the thermosetting resin. However, since this method uses synthetic resin, it has drawbacks such as being restricted from use in places where nonflammability and heat resistance are required, such as high-rise buildings, high-temperature furnaces, and chimneys. Therefore, in recent years, capsules made by separating and accommodating cement and water or water glass have become known.
No. 8605, Japanese Patent Publication No. 5 B-56594).

If this capsule is used, the flame resistance and heat resistance performance will be satisfied.

[Problem to be solved by the invention]

However, cement is usually distributed in powder form, and powdered cement is difficult to fill into containers during production due to its poor fluidity, and the powder scatters, requiring extensive dust-proof equipment and dust-proof protection. It has the disadvantage of requiring the use of equipment.

[Means to solve the problem]

The purpose of the present invention is to
An object of the present invention is to provide an inorganic capsule for fixing bolts that prevents powder from floating during production and has significantly improved filling properties.

That is, the present invention provides an inorganic bolt fixing capsule consisting of a container, cement contained in the container, and a hardening agent separated from the cement, in which the particle size of the cement is 0.
．． This is an inorganic capsule for fixing bolts, characterized by having a diameter in the range of 0.01 to 10 mm.

The outer container and inner container used in the present invention are easily destroyed by the rotational insertion movement of an anchor bolt attached to a drill during construction, and examples thereof include glass, ceramics, porcelain, synthetic resin, paper, etc. .

Glass is one of the preferred materials because it can be easily melt-sealed.

The cement used in the present invention is made by mixing Portland cement, alumina cement, jet cement, calcium oxide, etc. (hereinafter referred to as base cement), and the base cement with a non-shrinking agent, a quick hardening agent, etc. 250~120.000kg/cr
Compression molding is performed with a compression force of about 1, or the compression molded product is crushed using a crusher or the like. The particle size of each compression molded product or compression molded crushed product is 0.01 to 10 mm, and the molding density is 1.0 to 7.5 g/al. The particle size of the compression molded product or compression molded crushed product is 0. If the diameter is less than 0.1 mm, the fluidity is poor and it is difficult to fill the container during manufacture, causing the powder to scatter. Moreover, if the thickness exceeds 10 mm, the specified amount may not be filled into the container during manufacturing, or stirring with the curing agent may be poor when inserting the anchor bolt, resulting in poor curing.

The compression molded product or compression molded crushed product may be used singly or as a mixture, and the mixing ratio can be set arbitrarily.

The hardening agent used in the present invention is one that is mixed with the cement compression molded product or the cement compression molded crushed product and hardened, and includes, for example, water or water glass. This curing agent may optionally contain admixtures such as an AE agent, a water reducing agent, an accelerator, a retardant, and a foaming agent.

The ratio of the cement compression molded product or the crushed cement compression molded product and the hardening agent used in the present invention can be set based on the castability, mechanical strength after hardening, etc., and the ratio of the base cement in the cement compression molded product or the crushed cement compression molded product 30 to 70 parts by weight of curing agent is preferred.

Further, it is also possible to fill the outer container or the inner container with aggregate such as sand or gravel, and the filling amount can also be arbitrarily determined.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of the invention, and FIG. 2 is a sectional view showing another embodiment of the invention. In FIG. 1, a hardening agent 4 is sealed in an outer container l, and an inner container 2
A cement compression molded product or a crushed cement compression molded product is enclosed in the container.

〔Example〕

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

Example In the capsule shown in FIG. 2, the outer diameter is 10.2 mm.

A hardener tube was prepared by mixing 5.3 g of water and 0.29 g of a surfactant-based water reducing agent in a glass inner container with a total length of 100 mm, filling it, and sealing it. The curing agent tube has an outer diameter of 17 mm and a total length of 125 mm.
After loading into a glass outer container, 14 g of jet cement compression molded crushed product (particle size 1.46-2.38 mm) and 14 g of iron oxide non-shrink agent (ABC Shokai (Kiyomi, trade name: Non-Shrink)) were mixed and filled. At the time, the floating state of the powder and the filling fluidity were observed, and the glass outer container was sealed to make a prototype capsule.Next, a hole with an inner diameter of 19 mm and a length of 130 mm was made in concrete with a compressive strength of 210 kg/ci. , load the above capsule into the hole, and use a fully threaded bolt with an outer diameter of 16 mm (material: 5NB7) with the tip cut at 45 degrees.
) was attached to an electric hammer drill and buried to the bottom of the hole without being rotated or struck, and after curing for 24 hours, the adhesion strength was measured. The results are shown in Table 1.

Comparative Example A prototype was produced in the same manner as in Example 1, except that the jet cement compression molded crushed product used in the example was changed to a jet cement powder product.The suspended state of the powder and the filling fluidity were observed, and the fixation strength was measurements were taken. The results are shown in Table 1.

〔Effect of the invention〕

The inorganic capsule for bolt fixing of the present invention has almost no powder floating during manufacturing, and has greatly improved filling properties, and furthermore,
Provides stable adhesion.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the inorganic capsule for bolt fixation of the present invention, and FIG. 2 is a sectional view of another embodiment of the inorganic capsule for bolt fixation of the present invention. In the figure, ■ indicates an outer container, 2 indicates an inner container, 3a and 3b indicate a cement compression molded product and a cement compression molding crushing area, and 4 indicates a hardening agent. Patent applicant Asahi Kasei Industries, Ltd.

Claims (1)

[Claims] 1. An inorganic capsule for bolt fixation consisting of a container, cement contained in the container, and a hardening agent separated from the cement, wherein the cement has a particle size of 0.01 to 10
An inorganic capsule for bolt fixation characterized by being in the range of mm.