JPH0585720B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bolt fixing material for fixing an anchor bolt to concrete, rock, etc. (hereinafter referred to as base material). Conventionally, the method for fixing anchor bolts was to drill a hole in the base material, load a fixing material into the hole, and insert the anchor bolt while applying a rotational impact to the anchor bolt connected with a hammer drill, etc., to crush the container and store it in the container. A known method is to cure an unsaturated polyester resin to secure an anchor bolt. The fixing material used in this method is to fill a glass container with a resin whose main component is liquid unsaturated polyester resin, and then fill the container with a hardened resin whose main component is an organic peroxide such as benzoyl peroxide. A fixing material is known in which a sealing agent is housed in a glass tube. However, these adhesive materials had the following drawbacks. Bonding materials are often used for concrete base materials. In this case, there was a drawback that the cured resin material at the anchor bolt fixation part was eroded by the alkaline components contained in the concrete, and the fixation strength gradually decreased with the passage of time after the anchor bolt was installed. In addition, the environment in which the anchor bolt is used is, for example, an environment where it is constantly or intermittently in contact with chemicals such as acids, alkalis, or organic solvents, or an environment where it is constantly exposed to highly erosive sea breeze or sea water such as on the coast. In this case, the fixing part of the anchor bolt was eroded and sufficient fixing performance could not be maintained. The present invention solves these drawbacks and provides a corrosion-resistant bolt fixing material that exhibits minimal deterioration over time and is capable of maintaining sufficiently firm adhesion even in environments with strong erosion. . The present invention provides a container, a resin contained in the container, a resin contained in the container, and the resin separated from each other, and a resin contained in the container separated and contained in the container. The present invention is a corrosion-resistant bolt fixing fixing material characterized in that the main component of the resin is a resin in which a polymerizable monomer is mixed with a polyester acrylate resin. The structure of the adhesive material of the present invention can be designed in a wide range of ways and is not particularly limited. and, if necessary, aggregate or filler contained in an outer container and sealed;
Alternatively, an inner container in which a resin or a resin and a filler are sealed, and an outer container in which a curing agent and, if necessary, aggregates are stored and sealed, etc. may be mentioned. The container that can be used in the present invention is a container that does not break during transportation or storage, but is easily broken into pieces when inserting an anchor bolt, and includes glass,
It is made of ceramic or synthetic resin. However, the synthetic resin may be in the form of a film. One example of the resin that can be used in the present invention is a polyester acrylate resin, which can be combined with an α/β unsaturated dibasic acid such as maleic anhydride or fumaric acid, or, if necessary, a part thereof with anhydrous anhydride. Those substituted with saturated dibasic acid components such as phthalic acid, isophthalic acid, and terephthalic acid, bisphenol A, hydrogenated bisphenol A, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, neopentyl glycol, 2,2' A polyester resin obtained by polycondensing one or more polyhydric alcohols selected from di(4-hydroxypropoxyphenyl)propane and the like is modified with acrylic acid, methacrylic acid, and the like. More preferably, a bisphenol A type polyester resin obtained by polycondensing a polyhydric alcohol with bisphenol A, one or more other polyhydric alcohols, an unsaturated dibasic acid, or a saturated dibasic acid is added to an acrylic acid. Bisphenol A type polyester acrylate resin modified with , methacrylic acid, etc. has particularly excellent corrosion resistance. The viscosity of the resin that can be used in the present invention can be arbitrarily selected by mixing and diluting with the polymerizable monomer, but the viscosity of the mixture of the polyester acrylate resin and the polymerizable monomer is 5000 poise (25 °C) or less is preferable. When the temperature exceeds 5000 poise (25°C), the sedimentation rate of the aggregate in the resin becomes extremely slow, resulting in a decrease in productivity. Furthermore, during pouring and agitation, the hardening agent and aggregate are difficult to disperse uniformly, resulting in uneven hardening and insufficient adhesion. Polymerizable monomers that can be used in the present invention include:
Examples include styrene, vinyltoluene, chlorostyrene, methyl methacrylate, diallyl phthalate, and the like. Curing agents that can be used in the present invention include organic peroxides such as benzoyl peroxide, methyl ethyl ketone peroxide, lauryl peroxide, dicumyl peroxide, tertiary butyl peroctoate, cymene hydroperoxide, and cyclohexanone peroxide. etc. Further, a curing accelerator can be used to accelerate curing of the resin. However, in this case, the curing accelerator is, for example, amines such as dimethylaniline, diethylaniline, and dimethylparatoluidine; metal soaps such as cobalt naphthenate, cobalt octoate, manganese naphthenate, and calcium naphthenate; vanadyl acetylacetonate; , iron acetylacetonate, and other chelate compounds. Moreover, aggregate or filler can be mixed into the fixing material of the present invention as required. The aggregate is not particularly limited, but natural crushed stone or artificial stone such as magnesia clinker can be used. The filler is not particularly limited, but calcium carbonate, calcium sulfate, silicic anhydride, clay, etc. can be used. The composition of the corrosion-resistant bolt fixing material of the present invention can be selected from a wide range depending on the purpose of use, but
One example is polyester acrylate resin 50~
For 100 parts by weight of a mixture consisting of 100 parts by weight and 1 to 50 parts by weight of a polymerizable monomer, 0 to 5 parts by weight of hardening accelerator, 1 to 20 parts by weight of hardening agent, and 0 parts of aggregate or filler.
~500 parts by weight. The bolt fixing material of the present invention provides a stronger fixing force than conventional ones, and the degree of decrease in fixing strength due to alkaline components contained in concrete etc. is minimal, and the fixing force is maintained over a long period of time. . In addition, the environment in which anchor bolts are used may be acidic, alkali,
It is possible to maintain sufficient adhesion even in environments where there is constant or intermittent contact with chemicals such as organic solvents, or where there is constant exposure to highly erosive sea breezes or sea water such as on the coast. . Furthermore, since the anchoring material of the present invention is compatible with polyester acrylate resin compared to conventional anchoring materials for bolt fixing, it not only takes advantage of the chemical and physical characteristics of the resin itself, but also facilitates the insertion of anchor bolts during construction. Due to the rotational impact, the resin is uniformly mixed and stirred with the aggregate and curing agent, and easily adheres to the entire surface of the hole and bolt. In addition, resin primics, which are formed by mixing various large and small fragments of glass, porcelain tubes, synthetic resins, etc. used in containers, etc., solidify, resulting in an adhesive layer with higher mechanical strength than expected. It is presumed that it was given to him. These above-mentioned features should not be overlooked as they improve the reliability of the anchor bolt for the owner, constructor, etc. and facilitate long-term safety design. Next, embodiments of the present invention will be specifically explained with reference to Examples. Example 1 0.45 g of benzoyl peroxide diluted with calcium sulfate to a concentration of 50% was sealed in a glass inner container with an outer diameter of 5 mm and a length of 70 mm, and the container was sealed with an outer diameter of 13 mm and a length of 85 mm.
It is housed in a glass outer container with a diameter of 1.0 to 3.3 mm.
Mixture of 6.9 g of mm magnesia clinker, 3.0 g of bisphenol A type polyester acrylate resin and 1.3 g of styrene (viscosity 5 poise (25°C))
and 0.02 g of dimethylaniline, and sealed with a nylon cap to make a prototype adhesive. Next, the concrete with a compressive strength of 250Kg/cm ² and an inner diameter of 14.5mm and a length of
Drill a 100mm hole, attach a fully threaded S45C hardened bolt with a 45 degree cut at the tip to the electric hammer drill, and insert it to the bottom of the hole while applying rotational impact. Next, the pull-out load was measured after curing for 3 and 45 days at room temperature. As an alkali resistance test, concrete blocks after bolting were immersed in a saturated calcium hydroxide solution, and the pullout load was measured after 45 days. The results are shown in Table 1. Example 2 In the same container as in Example 1, a prototype was made in the same manner as in Example 1, except that 0.45 g of methyl ethyl ketone peroxide was used as a hardening agent and 0.02 g of cobalt naphthenate was used as a hardening accelerator, and a casting/pulling test was conducted. , the results are shown in Table 1. Comparative Example 1 Same container as Example 1, viscosity 22 poise (25℃)
A prototype was made in the same manner as in Example 1, except that 4.3 g of unsaturated polyester resin was used, and casting and pulling tests were conducted. The results are shown in Table 1. Comparative Example 2 In the same container as in Example 1, the viscosity was 5500 poise (25
A prototype was made in the same manner as in Example 1, except that 4.3 g of bisphenol A type polyester acrylate resin (4.3 g) was used, and casting and pulling tests were conducted. The results are shown in Table 1. 【table】

Claims (1)

[Claims] 1. A bolt fixing material consisting of a container, a resin contained in the container, and a curing agent isolated from the resin and contained in the container, in which the main component of the resin is polyester acrylate. A corrosion-resistant bolt fixing material characterized by being made of a resin mixed with a polymerizable monomer. 2. The corrosion-resistant bolt fixing material according to claim 1, wherein the resin is a bisphenol A type polyester acrylate resin. 3. A mixture of polyester resin and polymerizable monomer is liquid at room temperature and has a viscosity of 5000 pores (25
The corrosion-resistant fixing material for bolt fixing according to claim 1, characterized in that the corrosion resistance is less than or equal to .degree. 4. The corrosion-resistant bolt fixing material according to claim 1, wherein the hardening agent is an organic peroxide.