JP2019052535A - Fastening method of fixation element for rotary execution - Google Patents

Abstract

To provide a fastening method of a fixation element by a rotation execution having a high fastening force only by a rotation execution without impact even when improving a work efficiency by reducing a size of a hole for burying a fixation element and environment friendly.SOLUTION: A fixation element is mounted afterward into a hole drilled in a base material by a rotation execution without impact. A resin capsule 1 has a main agent composition 3 of radical-setting type resin and an aggregate 5 accommodated in a cylinder shape container 2 and has a hardening agent 4 of radical-setting type resin accommodated in a state isolated from the main agent composition of radical-setting type resin 3. The aggregate 5 is silica sand. A diameter of the container 2 is 0.94-1.02 times or less relative to a diameter of the fixation element and a volume quantity of the main agent composition is 30-50% relative to a volume of the fixation element of a part bullied in the hole.SELECTED DRAWING: Figure 1

Description

  In the present invention, when a fixing element such as an anchor bolt is retrofitted to a base material such as concrete, the fixing element fixing agent capsule in which a radical curable resin main agent is encapsulated is used to perform the rotation by a non-striking rotary construction. The present invention relates to a fixing method of a fixing element.

  In general, the following method is used to fix fixing elements such as anchor bolts, anchor bars, and insert hardware to a concrete wall or the like. First, a predetermined hole is drilled in a base material such as concrete using a drill, and a capsule containing a resin (fixing agent) is inserted into the hole. Then, the fixing element is fixed to the hole by breaking the resin capsule by embedding the fixing element while rotating it with an embedding machine and causing the resin capsule to flow out and harden in the hole.

  Such a fixing element fixing resin capsule is sealed in a cylindrical container made of glass or synthetic resin in a state where the main component composition of the radical curable resin and the curing agent are separated from each other. When the fixing element is embedded, the container is destroyed, and the main component composition of the radical curable resin and the curing agent are mixed, so that the curing proceeds and the fixing element is fixed. .

  However, such a resin capsule generally embeds a fixed element by rotation and impact, and has a problem that noise and vibration are generated at the time of impact. In particular, construction in a residential area is a big problem, and there is a problem that the time and period during which construction can be performed are limited.

  Therefore, the present applicant has proposed the following Patent Document 1 as a fixing element fixing resin capsule for rotating construction that can reduce the noise level during construction. In Patent Document 1, a main component composition of a radical curable resin and an aggregate are contained in a glass cylindrical container that can be pulverized by rotation, and a curing agent of the radical curable resin is a main component composition. Contained in isolation. In addition, by adjusting the viscosity and thixotropy coefficient of the main agent composition, it is possible to perform the rotation construction without hitting. As the radical curable resin here, an epoxy acrylate resin, a polyester acrylate resin, an acrylic urethane resin, or an unsaturated polyester resin containing a styrene monomer can be used. In addition, as the aggregate, inorganic aggregates such as glass, ceramic, silica, and quartz, and organic aggregates made of hard plastic such as hard vinyl chloride can be used.

JP 2003-56074 A

  In patent document 1, the noise level at the time of construction can be reduced by enabling construction without striking. However, since a hard material such as glass or ceramic is used as the aggregate, there is a problem in the mixing of the materials only by the rotation construction. Moreover, since a resin containing styrene is used as the radical curable resin, it also has environmental problems.

  By the way, the hole drilled in the concrete or the like when actually using this type of sticking agent can be worked faster as the diameter is smaller, and the labor for the operator can be further reduced. However, when the hole diameter for embedding is reduced, the gap between the fixing element and the hole is reduced, and the resistance force by the fixing agent is increased, so that the embedding force of the fixing element is required more than before. On the other hand, Patent Document 1 does not pay particular attention to the amount of the fixing agent with respect to the volume of the fixing element. Therefore, when the diameter of the hole is reduced, it is not possible to embed it accurately only by rotating construction without striking as it is. Even if it is constructed only by rotary construction, the fixing force is reduced.

  In order to solve this problem, simply by reducing the diameter of the hole for embedding, the diameter of the resin capsule may be reduced. However, if the diameter of the resin capsule is reduced, the adhesion area with the base material such as concrete is reduced and the amount of the fixing agent is reduced, so that the fixing force (anchor strength) of the fixing element is also reduced.

  Therefore, the present invention solves the above-mentioned problem, and its purpose is only to perform rotation construction without hitting even if the work speed and the labor of the worker are improved by reducing the hole for embedding the fixed element. It is another object of the present invention to provide a fixing method of a fixing element having a high fixing force.

  As a means for this, the present invention breaks the resin capsule by drilling a predetermined hole in a base material such as concrete, inserting a resin capsule for fixing element fixation into the hole, and then embedding the fixing element. The fixing element is fixed to the hole, and the resin capsule is formed in a glass cylindrical container that can be pulverized by rotation. And the curing agent of the radical curable resin is contained in a state isolated from the main agent composition, the aggregate is quartz sand, and the outer diameter of the container is the fixing element. 0.94 to 1.02 times the diameter of the base material composition, and the volume amount of the main agent composition is 30 to 50% with respect to the volume of the fixing element of the portion embedded in the hole, and the fixing Rotating construction without striking elements Accordingly, characterized in that embedded in the hole.

  The radical curable resin is preferably a radical curable resin not containing styrene. Specifically, acrylic modified vinyl ester resin, urethane modified vinyl ester resin, epoxy acrylate resin, polyester acrylate resin, acrylic resin, or unsaturated polyester resin each containing no styrene can be used.

  In the present invention, silica sand is used as the aggregate, so that the kneadability with the resin is improved, and the fixing force is improved only by rotating construction. In addition, in this kind of fixing element fixing resin capsule, it is known to use silica sand as an aggregate, but among the various aggregates such as glass and ceramic, there is a document describing that silica sand is excellent in kneadability. not exist.

  Moreover, in this invention, the diameter of the container (resin capsule) is made thinner than before. Specifically, it is as thin as 1.02 times or less with respect to the diameter of the fixing element (in a conventional resin capsule, generally 1.03 times or more with respect to the diameter of the fixing element). Thereby, the diameter of the hole for embedding the fixing element drilled in the base material such as concrete can be reduced, and the working speed and the labor of the worker can be improved.

  However, as it is, the resin resistance at the time of rotating construction increases, and the adhesion area with the base material such as concrete decreases or the amount of the fixing agent decreases, so that there is a possibility that sufficient fixing force cannot be obtained. Therefore, the volume of the main component composition accommodated in the container is adjusted to 30 to 50% with respect to the volume of the fixing element in the portion embedded in the hole, so that it can be embedded smoothly only by rotating construction. And an excellent fixing force (anchor strength) can be obtained.

  In addition, if a non-styrene resin is used as the radical curable resin, generation of VOC, which is a cause of environmental problems, can be suppressed.

  The fixing element fixing resin capsule used in the present invention was developed for rotating construction that can ensure a high fixing force (anchor strength) only by rotating construction, but at work sites where noise problems do not occur. It does not deny construction by rotation blow.

It is sectional drawing of the resin capsule for fixing element fixation.

  The present invention is described in detail below. As shown in FIG. 1, a fixing element fixing resin capsule (hereinafter simply referred to as a resin capsule) 1 used in the present invention includes a container 2 and a main component of a radical curable resin sealed and accommodated in the container 2. The composition 3, the curing agent 4, and the aggregate 5 are provided, and the main agent composition 3 and the curing agent 4 are contained in a state of being separated from each other so that they do not contact and react.

  The container 2 is a cylindrical container with a bottomed cylindrical shape, and has a certain rigidity (shape retention) for storage and is made of glass that can be crushed by rotation. If the container 2 is made of glass, the permeability of the radical curable resin encapsulated therein is lower than that of the resin container, so that it is suitable for long-term storage. The length of the container 2 is generally about 70 to 200 mm. The opening of the container 2 is sealed with a cap 6 made of polyethylene.

  In addition, the diameter of the container 2 is 1.02 times or less, preferably 1.00 times or less, more preferably 0.98 times or less with respect to the diameter of the fixing element. Thereby, the diameter of the hole for embedding | fixing element pierced in base materials, such as concrete, can be made smaller than before. On the other hand, if the diameter of the container 2 is 1.03 times or more, the gap between the fixing element and the hole is reduced when the hole diameter for fixing element embedding in the base material is reduced, and resistance due to the fixing agent is reduced. Since the force increases, a fixing element embedding force is required as compared with the conventional technique. Therefore, it is impossible to reduce the diameter of the fixing element embedding hole and improve the working efficiency. The lower limit of the diameter of the container 2 is not particularly limited, but may be set to 0.85 times or more, preferably 0.90 times or more, with respect to the diameter of the fixing element from the relationship with the amount of resin described later.

  There is no restriction | limiting in particular as radical curable resin, Basically, all the well-known things conventionally used in this kind of resin capsule can be used. Specific examples include an epoxy acrylate resin, a polyester acrylate resin, an acrylic urethane resin, and an unsaturated polyester resin. These radical curable resins can be used by mixing with reactive monomers.

  Among them, it is preferable to use a non-styrene type resin having a low environmental load. Specifically, it is preferable to use an acrylic-modified vinyl ester resin, a urethane-modified vinyl ester resin, an epoxy acrylate resin, a polyester acrylate resin, an acrylic resin, or an unsaturated polyester resin that does not contain a styrene monomer. In particular, an acrylic modified vinyl ester resin is preferable. The acrylic-modified vinyl ester resin has a higher adhering force than other resins and has a low transmittance with respect to a polyethylene cap, and thus can be stored for a long period of time. The main component composition of the radical curable resin means all uncured resin components other than the curing agent.

  These radical curable resins contain a polymerizable monomer. In the present invention, monomers other than styrene are preferable. Specifically, a (meth) acryl monomer is used. Examples of the polymerizable monomer (meth) acrylic monomer include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and isodecyl (meth) acrylate. , Lauryl (meth) acrylate, tridecyl (meth) acrylate, stearyl (meth) acrylate, cyclohexyl (meth) acrylate, furfuryl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, benzyl (meth) acrylate, phenoxyethyl (meth) Acrylate, isobornyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate Lilate, 2-hydroxy-3-acryloyloxypropyl (meth) acrylate, 2-methacryloyloxyethyl 2-hydroxypropyl phthalate, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, glycidyl (meth) acrylate, Ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1, 9-nonanediol di (meth) acrylate, 1,10-decanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, glycerin di (meth) acrylate, methoxy Liethylene glycol (meth) acrylate, butoxyethyl (meth) acrylate, neopentyl glycol di (meth) acrylate, trifluoroethyl (meth) acrylate, perfluorooctylethyl (meth) acrylate, allyl (meth) acrylate, dicyclopentenyl ( And (meth) acrylate and dicyclopentenyloxyethyl (meth) acrylate. These may be used alone or in combination of two or more.

  The (meth) acrylic monomer is preferably contained in an amount of 10 to 80% by weight, more preferably 20 to 60% by weight, based on the total amount of the main agent composition 3. When the content of the acrylic monomer is less than 10% by weight, the degree of polymerization of the radical curable resin is insufficient, and the fixing force is reduced. On the other hand, even if it exceeds 80% by weight, there is no great difference in fixing force, and costs are wasted.

  In addition, the main agent composition 3 includes a thixotropic agent and an esterification catalyst as necessary within a range not inhibiting the effects of the present invention (for example, about 0.01 to 5% by weight based on the total amount of the main agent composition 3). In addition, additives such as a polymerization inhibitor, a radical generator, a curing accelerator, a colorant, a pigment, an ultraviolet absorber, and a surfactant can be added and mixed.

  Examples of the thixotropic agent include fine silica, powderless alumina, talc, asbestos, colloidal hydrous aluminum silicate organic complex, bentonite, castor oil derivative and the like.

  As the esterification catalyst, a commonly used catalyst can be used. Tertiary amines such as triethylamine, dimethylbenzylamine and tributylamine; quaternary ammonium salts such as trimethylbenzylammonium; inorganic salts such as lithium chloride and chromium chloride Imidazole compounds such as 2-ethyl-4-methylimidazole; tetraphenylphosphonium bromide, tetramethylphosphonium chloride, diethylphenylpropylphosphonium chloride, triethylphenylphosphonium chloride, benzyltriphenylphosphonium chloride , Phosphonium salts such as dibenzylethylmethylphosphonium chloride, benzylmethyldiphenylphosphonium chloride; triphenylphosphine, tolylphosphine, etc. Phosphines; tetrabutyl urea; triphenylstibine and the like. Only one type of these catalysts may be used, or two or more types may be appropriately mixed and used.

  Any polymerization inhibitor may be used as long as it can suppress the product of the epoxidation reaction and the polymerization reaction of the unsaturated monobasic acid. For example, 4-methoxyphenol, hydroquinone, methylhydroquinone, methoxyhydroquinone, tert- Butyl hydroquinone, benzoquinone, catechol, copper naphthenate, copper powder and the like can be used. These may be used alone or in combination of two or more.

  Organic radicals and azo compounds can be used as the radical generator. Examples of the organic peroxide include ketone peroxide, peroxyketal, hydroperoxide, diallyl peroxide, diacyl peroxide, peroxyester, and peroxydicarbonate. Specific examples include benzoyl peroxide, dicumyl peroxide, diisopropyl peroxide, di-t-butyl peroxide, t-butylperoxybenzoate, 1,1-bis (t-butylperoxy) -3,3. , 5-trimethylcyclohexane, 2,5-dimethyl-2,5-bis (t-butylperoxy) hexyne-3,3-isopropyl hydroperoxide, t-butyl hydroperoxide, dicumyl peroxide, dicumyl hydro Peroxide, acetyl peroxide, bis (4-t-butylcyclohexyl) peroxydicarbonate, diisopropylperoxydicarbonate, isobutyl peroxide, 3,3,5-trimethylhexanoyl peroxide, lauryl peroxide, dicumy Peroxide, di -t- butyl peroxide, t- butyl hydroperoxide, azobisisobutyronitrile, and the like azo-bis-carboxylic amide. These may be used alone or in combination of two or more.

  Examples of the curing accelerator include N, N-dimethylaniline, N, N-diethylaniline, N, N-dimethyl-P-toluidine, N, N-dihydroxypropyl-P-toluidine, N, N-dihydroxypropyl-P-. Examples include aromatic anilines such as toluidine, N, N-dihydroxyethyl-P-toluidine, metal soaps such as cobalt naphthenate, and chelate compounds such as vanadyl acetylacetonate. These curing accelerators may be used alone or in combination of two or more.

  The aggregate 5 adjusts the rotational resistance when rotating. As the aggregate 5, quartz sand is used. According to this, the kneadability with the resin material becomes higher than other aggregates generally used conventionally, and as a result, the fixing force is improved. The quartz sand may be a natural product obtained by weathering granite or quartzite, or artificial quartz sand obtained by pulverizing quartz stone. The content of the aggregate 5 may be about 20 to 80% by weight, preferably 40 to 60% by weight with respect to the weight of the main agent composition 3. This is because if the content of the aggregate 5 is less than 20% by weight, the rotational resistance with respect to the fixing element is too small, and if it exceeds 80% by weight, the rotational resistance becomes too large.

  The curing agent 4 is accommodated in a state provided with a partition wall 7 that avoids contact with the main agent composition 3. Specifically, it can be accommodated in a state where it is filled in a hollow cylindrical isolation container having no reactivity with the main agent composition 3, or can be accommodated in a state of being wrapped by a cured film of a radical curable resin. Examples of the curing agent 4 include hydroxides such as cumene peroxide, dialkyl peroxides such as dicumyl peroxide, diacyl peroxides such as benzoyl peroxide, ketone peroxides such as methyl ethyl ketone peroxide, and bis ( 4-t-butylcyclohexyl) peroxyketals, organic peroxides such as peroxyesters such as t-butylperoxybenzoate, and organic peroxides such as dicyclohexyl phthalate, calcium carbonate, Those diluted with an inorganic substance such as calcium sulfate can also be used. These may be used alone or in combination of two or more.

  Diluents for curing agents include inorganic substances such as calcium sulfate and calcium carbonate, dimethyl phthalate, dibutyl phthalate, dicyclohexyl phthalate, dioctyl phthalate, aliphatic hydrocarbons, aromatic hydrocarbons, silicone oil, liquid paraffin polymerizable monomers, water, etc. Is mentioned. These may be used alone or in combination of two or more.

  The curing agent 4 is preferably contained in an amount of 1 to 70% by weight with respect to the weight of the main agent composition 3. If the amount is less than 1% by weight, it is difficult to obtain a sufficient cured state of the radical curable resin because there are too few curing agents, and if it exceeds 70% by weight, there is a problem in the moldability and strength of the cured molded body. It is because it becomes easy. The storage amount of the curing agent 4 is preferably 3 to 30% by weight, more preferably 5 to 10% by weight with respect to the weight of the main agent composition 3.

  In addition, additives such as a thixotropic agent, a diluent, and a plasticizer can be added to and mixed with the curing agent 4 as necessary, as long as the effects of the present invention are not impaired.

  According to the resin capsule 1 of the present invention, low noise, that is, a low noise level and a short noise generation time can be easily obtained by rotating construction without hitting. For this reason, unlike conventional cases, the construction time zone, construction time, and construction location are not limited due to noise, and the fixed elements are avoided while avoiding the effects of noise on nearby residents and residents who perform construction. Can be carried out and construction of seismic structural members can be carried out.

  For example, the noise can be suppressed to 60 dB or less by constructing using a rotary tool for rotating construction that is not accompanied by an impact of preferably 600 W or less. Moreover, the rotation construction time can be shortened compared to the slave, and in practice it can be performed in about 10 seconds. Such a noise reduction effect is remarkably exhibited among the fixing elements, particularly those having an anchor bar dimension of about 16 mm to 22 mm in outer diameter. These sizes are the sizes of anchor bars suitable for use in the seismic structure addition work. Noise can be measured with a noise level meter conforming to JIS C1502 in accordance with the conditions defined in JIS Z8731. In addition, if it is a work site where noise problems do not occur, it is possible to perform construction by rotating blow.

  In addition, the volume of the main ingredient composition 3 contained in the container 2 (resin capsule 1) is relative to the volume of the fixing element in the portion embedded in the fixing element embedding hole formed in the base material such as concrete. And adjust to 30 to 50%. When the amount (volume) of the main agent composition 3 is less than 30% with respect to the volume of the fixing element, the absolute resin amount is insufficient and a high fixing force cannot be obtained. On the other hand, if it exceeds 50%, the resin resistance at the time of fixing element embedding increases, so that it cannot be embedded accurately only by rotating construction without hitting, and if it is performed only by rotating construction, the fixing force decreases. To do.

  An uncured resin composition not containing styrene shown in Table 1 was filled in a cylindrical glass container having one of the outer dimensions shown in Table 1 and sealed in a glass tube. Then, a hardener tube containing 0.8 g of benzoyl peroxide is inserted, 11.5 g of natural cinnabar sand having an appropriate particle size is filled, and sealed with a polyethylene cap to obtain a resin capsule for fixing a fixed element. It was.

  Using these, drill holes of the size shown in Table 1 in the concrete with a concrete drill, clean the inside of the hole, then insert each resin capsule into the hole, and with a rotary drill, the diameter of Table 1 The anchor muscle was embedded to the bottom of the hole only by rotation. Table 1 shows the time required for embedding the anchor muscle to the hole bottom.

  After completion of anchor embedding, curing for 24 hours was performed, and then the pullout strength of the anchor was measured. Along with the results, the adhesion strength and fracture pattern of the fixing agent are also shown in Table 1.

  From the results in Table 1, the outer diameter of the container (resin capsule) is 1.02 times or less than the diameter of the fixing element, and the volume of the main agent composition is embedded in the hole drilled in the base material. In Examples 1 to 12, which are 30 to 50% with respect to the volume of the fixing element in the part, it was confirmed that the construction time was short and also had a good fixing force. In particular, when Example 12 using a thick anchor bar having a diameter of 24 mm is compared with Comparative Example 3, Example 12 can shorten the construction time by reducing the diameter of the hole for embedding. Moreover, also in Examples 1-12 only by rotation construction, it was equipped with the same fixing force (anchor muscle strength) as the reference example constructed by the rotation blow like the past.

  On the other hand, in Comparative Example 1, the volume of the main agent composition exceeds 50% with respect to the volume of the fixing element embedded in the hole. In Comparative Example 2, the outer diameter of the container (resin capsule) Was more than 1.02 times the diameter of the fixing element, so the anchor strength was low.

DESCRIPTION OF SYMBOLS 1 Resin capsule 2 Container 3 Main agent composition 4 Hardener 5 Aggregate

Claims (1)

A predetermined hole is drilled in a base material such as concrete, and after inserting a resin capsule for fixing element fixation into the hole, the fixing element is embedded to break the resin capsule and fix the fixing element to the hole. The fixing method of the fixing element,
The resin capsule contains a radical curable resin main component composition and an aggregate in a glass cylindrical container that can be pulverized by rotation, and the radical curable resin curing agent is the main component composition. Housed in isolation from objects,
The aggregate is quartz sand;
The outer diameter of the container is 0.94 to 1.02 times the diameter of the fixing element;
The volume amount of the main agent composition is 30 to 50% with respect to the volume of the fixing element in the portion embedded in the hole,
A fixing method of a fixing element, wherein the fixing element is embedded in the hole by a rotation construction without striking.

Images