JPS5956000A - Fixing agent for fixing bolt - 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 fixing agent used for bolt fixing, and more particularly to a fixing agent used for bolt fixing comprising a liquid resin, a magnetic linker, and a hardening agent.

Traditionally, as a fixing agent for bolt fixing, natural river gravel or sea gravel has been used as aggregate, or crushed rock that has been crushed to an appropriate size has been used as aggregate, and this aggregate has been mixed with gay fat. There is a mixture in which the mixture and the curing agent are separated and stored in the same container. This bolt fixing agent is inserted into a hole in concrete, rock, or other base material, and then crushed by the rotation of the anchor bolt.
The resin is stirred and mixed and then used to secure the anchor bolt in the borehole through a curing reaction between the resin and the curing agent.

However, the quality of the aggregate used in this bolt fixing agent differs depending on the quarry location, and in the case of crushed stone, the material is uneven depending on the location even if it is the same rock, and the material is hard to the crushed stone aggregate. There is a risk that the product will be composed of grains, soft grains, and soft grains. In addition, the difference in driving resistance caused by the hardness of the crushed stone aggregate not only affects the length of bolt driving time, but also the difference in driving resistance caused by the hardness of the crushed stone aggregate. At the same time, the scraped concrete powder mixes with the resin and reduces the adhesive strength.If the pouring time is too long, the resin starts to gel and the viscosity increases, causing the bolt to rotate. As a result, bolts cannot be penetrated to the bottom of the hole, resulting in uneven bolt lengths and problems in subsequent construction.Furthermore, differences in the chemical composition of the aggregate The variation in the adhesive strength of the resin due to this cannot be overlooked, and is the cause of the variation in the mechanical strength of the fixed resin after casting.

On the other hand, from the viewpoint of manufacturing adhesives for bolt fixing, aggregate has a low bulk specific gravity and has a slow sedimentation rate in resin.

In particular, in the case of crushed stone aggregate, the shape of the grains is angular and not rounded, which causes a bridging phenomenon between the grains and prevents them from settling smoothly, which is one of the causes of reduced production efficiency.

The present invention was developed with the aim of creating a fixing agent for bolts that does not have the above-mentioned problems. The present invention was completed based on the discovery that a bolt fixing agent free from the above-mentioned problems could be obtained by using the above-mentioned aggregate as an aggregate.

That is, the present invention provides a fixing agent for bolt fixing comprising a liquid resin, a hardener, and a hardening agent, in which the aggregate is a magnetic linker.

The fixing agent for bolt fixing of the present invention uses artificially treated magcine shag linker, which has a constant particle composition and rostral properties, as an aggregate, so it has a low driving resistance. There is little wobbling, and the destructive force caused by the rotational impact of the bolt is constant, and as a result, the embedding time is also constant, allowing for efficient and accurate production.

However, magnesha clinker particles are softer than gravel or crushed stone, and are not particularly angular like crushed stone, and their roundness is close to a perfect circle, so no bridging phenomenon occurs during construction.1. J? There are advantages in that the amount of fracture energy required during the rotational impact of the rotor is reduced, the embedding time is shortened, and the worker's workload is also reduced. Furthermore, compared to conventional bolt-fixing adhesives that use gravel or crushed stone as bone material, the mechanical strength (tensile strength, bending strength, compressive strength, impact strength) is the same as above when fixed, As a result, the pull-out load of the bolt increases. Furthermore, magnesha clinker has a bulk specific gravity higher than that of sand or crushed stone, and its shape is close to a perfect circle, so when it is mixed into zebra fat, the particles do not bridge together, and the sedimentation rate is fast. It has the effect of increasing productivity and improving quality and performance.

The magnesia clinker used in the present invention has a homogeneous composition obtained by firing seawater magnesia or ike dolomite at high temperatures, and the matrix is adjusted to be forsterite with a high melting point, so the volume is small. Excellent stability. Particularly preferred is one calcined from seawater magnesia with a bulk specific gravity of 3.2 or more and a magnesium oxide content of 95% or more.

The liquid resin used in the present invention is unsaturated polyamide resin 1, which has been conventionally used as an adhesive for bolt fixing.
Thermosetting resins and inorganic adhesives such as urethane, gamma resin, etc. can also be used. Of these, the oldest one. li, 00
Unsaturated polyester resins of 0 to 15,000 centivoise (3125°C) are preferred.

The curing agent used in the present invention is 1Ml benzoyl dioxide [
Benzoyl ξ-Ogishir (BPO) powderffi
It is a powder diluted with an inorganic filler, and it is also a lauroilno?
-oxy)' (LPO), methyl ethyl leketone peroxy)' (MBKPO), etc. can also be used.

The solidifying agent 1 for bolt fixing of the present invention can be manufactured by a conventional molding method for a solidifying agent for fixing 7 bolts.

For example, magnesia clinker is added to 100 parts by weight of liquid resin.
70 weight 1 part to 2 parts [ti parts, preferably 1
It is produced by a method in which all 50 to 180 parts by weight of the curing agent are mixed together to form a mixture, and the mixture and the curing agent are separately stored in the same container, for example, a glass container.

When an unsaturated polynisder resin is used as the liquid resin in the bolt fixing fixing 37 of the present invention, the magnesia linker is stable because its surface is covered with a film of 8i02/MgO compound and inactivated. However, when the particles are broken by the rotational impact of the bolt during use, some of the active MgO present inside the particles breaks down into carxyl group (-000J-I), which is one of the terminal groups of the unsaturated alkyd.
) during the curing reaction process, forming metal crosslinked Silipreg C.
(-aoo), Mg] is thought to improve the physical properties of the solidified resin and effectively act to increase the adhesion force.

The present invention will be explained below with reference to Examples and Comparative Examples.

Example 1 Outer diameter: 10.6 mm, wall thickness: 0.7 mm, pipe length: 80 mm
mn+, unsaturated polyester resin (Polymer 280
t) with different viscosities as shown in Table 1.
This machine is filled to a size of 2.62, and then the particle size is adjusted in advance.
Magnesium clinker aggregate between 5 and 2.4 [Grade HP manufactured by Shin Nihon Kagaku Kogyo Co., Ltd.] Filled according to the ridges shown in Table 1, and separately placed in a thin glass tube with the resin curing agent (concentration 30%) A fixing agent sample was prepared by filling and sealing benzoyl peroxide (benzoyl peroxide) 0゜41 and sealing the mouth of the outer tube with a synthetic resin cap, and placing it in a concrete block with a compressive strength of 240 kg/1yn2 with a diameter of 12 mm and a depth. After making a hole of 80 mm and inserting the fixing agent of the sample, set a fully threaded bolt 88-41 (45° beveled tip) with an outer diameter of main inch and a length of 120 mm into a hammer drill, and rotate the bolt with agitation. and embedded it to a certain length. After 3 hours of curing, the maximum pullout load was measured using a hydraulic footmeter. The results are shown in Table 1.

Margin below In the size of this example, the higher the viscosity of the polyester resin, the stronger the adhesive force.If the viscosity is kept constant, the adhesive strength is higher when the weight-14 ratio of the magnesha linker and resin is around 150. It can be seen that it shows.

Example 2 A hard glass tube with an outer diameter of 28 Mn, a wall thickness of 1.1 mm, and a total P of 250 horse meat volume of 142 cc was made of unsaturated polyester resin [(Polymer 2801) 2] in which a curing accelerator was mixed in advance.
000 cp) 72.5 y is filled, and then magnesha clinker aggregate gold (New Japan Co., Ltd. Fill a chemical grade 1 (P) to the weight shown in Table 2, and separately fill a thin glass tube with the hardening agent for the resin (benzoyl peroxide with a concentration of 35%) to 8.2 r; plug it. A fixing agent sample was prepared by storing the outer tube and sealing the mouth of the outer tube with a synthetic resin cap, and a concrete block with a compressive strength of 240/α2 was made with 32 holes in diameter and 300+ nm in depth, and the fixing agent of the sample was inserted into the concrete block. Outer diameter 1 inch long 350 mm
Fully threaded bolt 88-41 (45° beveled tip)
Set in a Mardrill and rotate and stir the dirt, embed it to a certain length and cure for 3 hours. Maximum pullout load is shown in Table 2. For the size of this example, the weight ratio of magnetic screw clinker and resin is A fixing agent for bolt fixing with an intermediate size between Example J and Example 2 with a fixing force of around 180 (outer diameter 20
(mmJ length: 150 mm, internal volume: 43 cc), the aggregate was made using magnesha clinker (OP), crushed natural stone, river gravel, and crushed porcelain tube, which is a type of ceramics, based on the following components: A prototype was made, and a Zelto with an outer diameter of % inches and a length of 300 mm was buried in a concrete block and cured for 3 hours, then a pullout test was conducted and the maximum pullout load was compared. [Unsaturated polyester resin (Polymer 2801) 19.4 y, benzoyl peroxide (concentration 30%) 2.7 f, aggregate (particle size 1.5-2
．． 45 parts for 4 rooms, 45 parts for 2 degrees 4-3, 3 rooms, 3.3-5.
5 coral 10 parts mixed grain) 27.2 y, bone phase/resin 100
Shigetoshibe = 192].

From these results, it can be seen that the adhesive for fixing Zelto using magnesha clinker aggregate has a superior fixing force than natural stone aggregate and -m ceramic pipe crushed aggregate.

Example 4 and Comparative Example 4 Aggregate and glass tube powder filler were mixed with resin to achieve the mixing ratio that would occur when the solid broom for fixing Zelto was broken by stirring impact during actual casting. Then, the main mechanical strengths were actually measured according to JIS-6911 (General Test Method for Thermosetting Silastics), which is used to make a hardened and molded cast plate. The results are shown in Table 4.

The mechanical strength of the casting plate using the November magnesha clinker aggregate shown in Table 4 below is superior to that of natural crushed stone.

This proves that the pull-out load of +,1:,,*rut is superior.

Real 17ji l? lJ 5 and Comparative Examples 5-6 Outer diameter inch, No.<5 (I OIIn full thread bolt (S
From the tip of S-41) to a certain length of 300 turns), drill the concrete block's blue 1 hole 6τ...nmar 1 rill' (
Hitachi PI (, P-38JIJj, 400 rpm
) I investigated the time required for pouring and embedding using only its own weight. The adhesive for fixing the gilt is a sample with an internal volume of 142 CC, size 11, and the bone structure is river gravel, 1"? stone, and maghon.
Each linker has the same 4i openings ([: ,
1'' (made) so that j, il'' are composed of acid ratios.

The results are shown in Table 5.

Below ≦J) White Table 5 Compared to the curved and natural stone aggregate liquid shown in Table 5, the magnesha clinker aggregate has a shorter casting time.

Especially when using a fixing agent with an internal volume of 425 cc. When it comes to the case of driving a thick anchor bolt with a diameter of 5 inches, it can be said that the amount of labor required by the worker is extremely reduced and the contribution to efficiency improvement is very noticeable.

[Brief explanation of drawings]

Figure 1 shows the conventional 1jξ route 1ε! 1 fixing agent 1 (
Figure 2 (ζ[, Cross-section of the adhesive for fixing dirt of the present invention using magnesha clinker-bone phase with the same particle size, same weight, and same blending ratio as the aggregate used in Figure 1. In the figure, 1 is a vitreous tube, 2 is an overnight resin, 3 is a vitreous tube, 4 is a hardening agent, 5 is a plastic cap, 6 is a natural stone bone phase such as crushed stone or river gravel, and 7 is a magnesia clinker. bone) l-4 is shown. Special K (; Applicant: Asahi Kasei Industries, Ltd.

Claims (1)

[Claims] 1. A bolt fixing agent comprising a liquid resin, an aggregate, and a hardening agent, wherein the aggregate is a magnesha linker. 2. 100 parts by weight of a liquid resin. and Magneshaklinker-70
The fixing agent for bolt fixing 3 according to claim 1, characterized in that the liquid resin is an unfilled Japanese polyester resin with a viscosity of 100 to 15,000 cp. A fixing agent for bolt fixing according to claim 1, characterized in that the magnesha linker has a bulk specific gravity of 3.2 or more and a magnesium oxide content of 95% or more. Fixing agent for bolt fixing described in section