JPH09158697A - Hardening agent for capsule anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin capsule anchor with high reliability by including a hardening agent which is a compact subjected to water proof processing in a gap between an inner case filled with a viscous liquid resin and an outer case formed by paper or the like. SOLUTION: A glass-made inner case 2 is filled with epoxy acrylate resin 3, and thrown in a cylindrical outer case 1 which is formed by kraft paper and has one-direction end closed with an adhesive. A hardening agent 5 in which magnesite clinker and a benzoyl peroxide are formed as an aggregate 4 and the surface is coated with epoxyacrylate resin is filled in a gap between the inner case and the outer case with a designated quantity of mixture and the open part is closed by an adhesive to form a capsule. A concrete block is bored and the inside of a hole is cleaned. After that, a capsule is inserted in the hole, a total screw bolt, the tip of which is cut to a 45 deg. arc is mounted on a hammer drill and buried to the bottom of the hole, and curing for one day is performed. Thus, it is possible to provide a hardening agent for a resin capsule anchor, which is excellent in moisture-resistance, water resisting property and has high fixing strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curing agent for a resin capsule anchor in which an outer container is made of paper.

[0002]

2. Description of the Related Art Conventionally, resin capsule anchors have been used for setting anchor bolts and reinforcing bars in concrete structures, rocks, etc. for installation of facilities, etc. There are two components, or three components with aggregate added, and there are a type in which anchor bolts and reinforcing bars are hammered in and a type in which anchor bolts and reinforcing bars are embedded while rotating and hitting with a hammer drill.

A resin capsule anchor of the type in which anchor bolts and reinforcing bars are embedded while being rotated and hit with a hammer drill or the like is a viscous liquid resin or aggregate that can be hardened in a generally crushable cylindrical glass container. And, a resin capsule anchor having a double container structure in which a curing agent enclosed in a glass inner container is arranged is widely used (Japanese Patent Publication No. 62-37).
076 publication).

A bolt fixing cartridge comprising a crushable outer container and a crushable inner container, one of which is filled with a viscous liquid resin and the other of which is filled with a hardening agent of the viscous liquid resin and an aggregate. There is known a bolt fixing cartridge characterized in that a solid granular hardening agent and an aggregate are mixed substantially uniformly (Japanese Patent Publication No. 4-1160).

[0005]

A resin capsule anchor consisting of three components, viscous liquid resin, curing agent and aggregate, is a highly reliable resin capsule anchor that exhibits high bond strength, and its application is on land and underwater. Therefore, high fixing strength is required even in places where water inside the holes cannot be removed, such as underwater construction. A resin capsule anchor consisting of three components, which is made of glass, plastic, or other material that can block the infiltration of water, such as a glass capsule or plastic container, does not entangle the water because the resin mixture spits out water during construction, and the variation is relatively small. Stable fixing performance can be expressed.

However, if the outer container is made of paper that easily absorbs water, and the hardener is contained in the gap between the inner container and the outer container, the powdery one is inside the outer container when the capsule is inserted. The hardener disperses in the water that has penetrated into the water and sinks to the bottom, causing a bias in the hardener. Therefore, there is a problem that the viscous liquid resin and the curing agent are not sufficiently mixed at the time of construction, and the resin is uncured and the adhesive strength cannot be exhibited.
Further, when the curing agent is granular, there is a problem that absorbed water is present in the resin mixture to form a gap in the cured product, which makes the cured product brittle and significantly reduces the fixing strength.

It is an object of the present invention to provide a curing agent for a resin capsule anchor which is excellent in moisture resistance and water resistance, is stable, and exhibits high fixing strength, and is highly reliable.

[0008]

The present invention is directed to an inner container filled with a viscous liquid resin, an outer container made of paper or a non-woven fabric, and a resin capsule anchor in which at least a curing agent is contained in a gap between the inner container and the outer container. In the above, the curing agent is a molded product containing an organic peroxide as a main component and a water resistant agent.

The hardener molded body used in the present invention is a molded body which has been subjected to a water resistant treatment with a water resistant agent, and is placed in the longitudinal direction in the inner container so that it is sufficiently mixed with the viscous liquid resin in the inner container. As long as it can be arranged substantially uniformly along the
There are a granular shape, an ellipsoidal shape, a spherical shape, a cylindrical shape, and one having a plurality of irregularities. Further, the water resistance treatment may be performed on the surface or inside of the curing agent, and the treatment method includes a method of applying the water resistance agent after molding the curing agent, a method of forming a slurry containing the water resistance agent and water, and drying the slurry. However, the latter is preferable in terms of manufacturability. As the water resistant agent of the method of applying the water resistant agent after molding the curing agent, there are silicone, paraffin, epoxy acrylate resin, epoxy resin, synthetic resin latex, and the like.
B latex, synthetic resin latex such as Saran latex and acrylic latex, and higher fatty acid such as stearic acid, palmitic acid and oleic acid. Furthermore, carboxymethyl cellulose, methyl cellulose, guar gum,
It is more effective when used in combination with a water-soluble binder such as locust bean gum.

[0010] Further, the molded product of the curing agent is subject to vibration during transportation,
In consideration of disintegration due to impact and fracture mixability at the time of driving, the compressive fracture strength is preferably 100 gf / cm ² or more. Examples of the curing agent include epoxy acrylate resins and the like, hydroperoxides such as cumene peroxide, dialkyl peroxides such as dicumyl peroxide, diacyl peroxides such as benzoyl peroxide, and ketone peroxides such as methyl ethyl ketone peroxide. And organic peroxides such as peroxycarbonates such as bis- (4-t-butylcyclohexyl) peroxycarbonate, and most commonly benzoyl peroxide is used. The curing agent is generally diluted with a diluent such as calcium carbonate or calcium sulfate before use. As the epoxy resin, an amine-based curing agent, an acid anhydride or the like diluted with a diluent such as calcium carbonate or calcium sulfate is used.

The paper of the outer container used in the present invention may be any one that can be easily processed into a cylindrical shape, and examples of the paper include newspaper roll paper, printing paper, writing paper, kraft paper,
Paper made from plant-based materials such as filter paper, continuous slip paper, Japanese paper,
Coated paper with surface treatment such as coated paper or laminated paper,
Examples include synthetic paper for posters, rayon paper, nylon paper, vinylon paper, spunbond and other synthetic fiber paper.

The viscous liquid resin used in the present invention may be any resin that can be cured by mixing with a curing agent, and examples of the type that cures by a radical reaction include epoxy acrylate resin, polyester acrylate resin, unsaturated polyester resin and the like. An epoxy resin or the like is used as a type in which the resin and the curing agent are cured by an ionic reaction. Furthermore, as a viscous liquid resin, it has fixing performance, low temperature curability,
It is preferable to use a radical-curable epoxy acrylate resin or polyester acrylate resin having excellent alkali resistance. These radical-curable resins may contain reactive monomers such as styrene monomer and methyl methacrylate. If necessary, the viscous liquid resin may include a polymerization inhibitor, a pigment, an ultraviolet absorber, a surfactant, a filler,
Thickeners, fillers, thixotropic agents (fine silica powder, etc.), colorants and the like can be added.

Further, a resin curing accelerator may be used, and examples thereof include N, N-dimethylaniline, N,
Aromatic anilines such as N-dimethyl-P-toluidine,
Examples include metal soaps such as cobalt naphthenate and chelate compounds such as vanadyl acetylacetonate. In the epoxy resin, phenols such as p-chlorophenol and amines such as N, N-dimethylbenzylamine can be used alone or in combination of two or more.

The shape of the inner container used in the present invention is not particularly limited, but generally a cylindrical and straight shape is used. Further, the material of the inner container is not particularly limited as long as it can be crushed or torn and can block the penetration of the viscous liquid resin and the resin diluent, and glass, plastic, paper, etc. can be used, A glass tube is preferably used. The sealing method may be such that the viscous liquid resin does not leak, and when a glass tube is used, it is sealed by fusion or a cap.

The aggregate used in the present invention may be any as long as it can be destroyed by rotation, impact, etc. during construction. Generally, artificial aggregate such as magnesia clinker or glass, silica stone,
Inorganic substances such as natural stones such as quartz are used,
It may be an organic substance such as a hard plastic such as hard vinyl chloride.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments.

[0017]

Example 1 Methacrylic type epoxy acrylate resin obtained by adding methacrylic acid to bisphenol A type epoxy resin having an average molecular weight of 580, 65 wt%, styrene monomer 3
4 wt%, N, N dimethylaniline as a promoter 1 wt
% Resin having an outer diameter of 11.0 mm,
A glass inner container having a wall thickness of 0.5 mm and a length of 80 mm was filled and sealed. Next, this container was made of kraft paper having a basis weight of 50 g, and the inner end was closed with an adhesive at an inner diameter of 17.0 m.
After being charged into a cylindrical outer container having a length of m and a length of 85 mm, 16 g of magnesia clinker having a particle size of 1.5 to 3.0 mm as an aggregate was diluted with calcium sulfate to a 40% concentration in a gap between the inner container and the outer container. Benzoyl peroxide particle size 1.0
1.0 g of a curing agent having a particle size of up to 2.0 mm and having a surface coated with an epoxy acrylate resin was mixed and filled, and the open portion was closed with an adhesive to manufacture a capsule.

Next, size 500 × 500 × 1000 m
m, a hole having a drilling diameter of 19 mm and a drilling length of 85 mm was drilled in a concrete block having a compressive strength of 210 kg / cm ² , and after cleaning the inside of the hole using a blower and a nylon brush,
The above-mentioned capsule was inserted into the perforation, and the tip was cut at 45 degrees.
NB7) was attached to a hammer drill, and while being rotated and hit, it was embedded to the bottom of the hole, and a curing time of 1 day was set to measure the bond strength. Anchor bolt tensile tester ANSER-5-III (manufactured by Asahi Kasei Corporation) was used as the measuring instrument.

Further, after perforating and cleaning the inside of the hole in the same manner as described above, a frame was made of a vinyl chloride plate on the concrete block so that water could be accumulated in the hole, and the inside of the hole was made into a state of water hole. The capsule was inserted into this hole, left for 5 minutes, and then the tip was cut at 45 degrees.
B7) was mounted on a hammer drill, and while being rotated and hit, it was embedded to the bottom of the hole, and a curing time of 1 day was set to measure the bonding strength. The number of measurements was 3, and the results of variation (R) from the lowest value to the highest value are shown in Table 1.

[0020]

Example 2 100 parts by weight of benzoyl peroxide diluted with calcium sulfate to a concentration of 40% as a curing agent, 100 parts by weight of SB latex, 1 part by weight (solid content), and 20 parts by weight of water, a slurry having a particle size of Example 1 except that 1.0 g of dried and formed film having a thickness of 1.5 to 3.0 mm was used.
The capsule was prototyped in the same manner as in. Table 1 shows the results of the adhesion strength in the dry holes and the water holes at that time.

[0021]

[Example 3] A capsule was prototyped in the same manner as in Example 1 except that a polypropylene nonwoven fabric having a basis weight of 40 g was used as the outer container. Table 1 shows the results of the adhesion strength in the dry holes and the water holes at that time.

[0022]

[Comparative Example 1] 40% powdered calcium sulfate as a curing agent
% Benzoyl peroxide diluted to 1.0%
Prototype capsules were manufactured in the same manner as in Example 1 except that g was used. Table 1 shows the results of the adhesion strength in the dry holes and the water holes at that time.

[0023]

[Comparative Example 2] A slurry composed of 100 parts by weight of benzoyl peroxide diluted with calcium sulfate to a concentration of 40% as a curing agent, 0.1 parts by weight of methyl cellulose, and 20 parts by weight of water was prepared to have a particle size of 1.0. Prototype capsules were prepared in the same manner as in Example 1 except that 1.0 g of the dried film having a thickness of 2.0 mm was used. Table 1 shows the results of the adhesion strength in the dry holes and the water holes at that time.

[0024]

[Table 1]

As can be seen from Table 1 above, the curing agent treated with the waterproofing agent has excellent performance in papers whose outer container easily absorbs water without any deterioration in fixing performance in water holes. Is to demonstrate.

[0026]

As described above in detail, since the hardening agent for capsule anchors according to the present invention is a hardening agent that has been subjected to a water resistant treatment, there is no decrease in the bonding strength even in water holes and underwater construction. In particular, it is possible to provide a curing agent for a capsule anchor which is effective for a container whose material is paper and which easily absorbs water.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of a resin capsule anchor.

[Explanation of symbols]

 1 Outer container 2 Inner container 3 Resin 4 Aggregate 5 Hardener

Claims (2)

[Claims] 1. An inner container filled with a viscous liquid resin, an outer container made of paper, and a resin capsule anchor in which at least a curing agent is included in a gap between the inner container and the outer container, the curing agent is subjected to water resistance treatment. A cured agent for a resin capsule anchor, which is a molded product. 2. The curing agent for a capsule anchor according to claim 1, wherein the viscous liquid resin contains an epoxy acrylate resin or a polyester acrylate resin as a main component.