JPH0610444A - Fiber reinforcer and structure material therewith - Google Patents

Abstract

PURPOSE:To improve the adhesion of a fiber reinforcer with concrete and facilitate an increase in the contact area as well as to make its manufacture easy and inexpensive. CONSTITUTION:A deformed main bar member 1a, made up of projectingly attaching each resin 2 improved in thixotropy, is constituted on the outer circumferential surface of a linear or bar main bar member 1 composed of impregnating and hardening resin after merging plural pieces of continuous fibers in one. Two pieces of this main bar member 1a are set up in prallel, winding a cross bar member 3 on the circumference tight, thus base element members BE are constituted. Likewise, several pieces of these base element members BE are set up, winding each cross bar member 3a on the circumference tight, and thus combined element members CE are constituted. In succession, these members are installed in a cement material or plastic material as a reinforcer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber reinforcing material used as a reinforcing material for concrete, mortar or the like, or as a reinforcing material for synthetic resin, and a structural material using the same.

[0002]

2. Description of the Related Art Conventionally, reinforcing bars and steel materials have been used as reinforcing materials for concrete and the like, but they are heavy and corrode due to neutralization of concrete due to infiltration of chloride or carbon dioxide gas. There is deterioration due to galvanic corrosion due to stray current.

Therefore, various attempts have been made with the recognition that the above problems can be solved by using a fiber material for reinforcing concrete or the like.

[0004] For example, a fibrous material is chopped, reticulated,
It has been proposed to use it as a three-dimensional woven fabric.

Further, it is known that unevenness is provided on the surface of the fiber reinforcing material in order to increase the adhesiveness with concrete.
No. 3-206548 and Japanese Patent Application Laid-Open No. 2-158321.

Japanese Unexamined Patent Publication No. 63-206548 discloses a method of forming irregularities on the surface of a rod material in which a thermoplastic resin is reinforced with fibers.

Further, Japanese Patent Laid-Open No. 2-158321 discloses a method in which a linear or rod-shaped core made of fiber reinforced thermoplastic resin is coated with a thermoplastic resin, and irregularities are formed in the coating by using a plurality of split molds. Is disclosed.

[0008]

However, JP-A-63-
The method according to No. 206548 has a problem that the tensile strength of the bar is lowered and the linearly extending reinforcing fiber is bent due to the formation of the recess.

Further, the method of Japanese Patent Laid-Open No. 2-158321 discloses a method of forming an uneven molding surface without disturbing the arrangement of the reinforcing fibers.

However, when this method is used as a reinforcing material for concrete or the like, the contact area with the concrete is only a linear or rod-shaped surface. However, there is a problem that the cost becomes expensive.

The present invention has been proposed in view of the above problems of conventional fiber reinforcing materials, and its object is to:
An object of the present invention is to provide an inexpensive fiber reinforcing material and a structural material using the same, which can improve the adhesion to concrete, facilitate the increase of the contact area, and are easy to manufacture.

[0012]

In order to achieve the above-mentioned object, one of the present inventions is to combine a plurality of continuous fibers and impregnate and harden a resin on the outer peripheral surface of a linear or rod-shaped main bar member. The fiber reinforcing material is composed of a deformed main bar member to which a resin having improved thixotropy is attached in a protrusion shape.

The above-mentioned thixotropy means, for example, when the resin is made to flow by stirring or shaking, the viscosity of the resin becomes lower with the increase of the speed, and for example, when the resin is left as it is, it is made to flow. When the speed decreases, the viscosity of the resin increases with it, and in extreme cases, it becomes a state close to a gel. The continuous fiber includes both continuous fibers and continuous fibers in the form of spun yarn.

According to another aspect of the present invention, the deformed main bar member is used as a basic unit and a plurality of the deformed main bar members are arranged in parallel at a predetermined interval, or a main bar member which is not deformed is arranged. A plurality of main bar members are arranged in parallel at predetermined intervals, and a cross bar member is wound and fixed around the plurality of main bar members. For a main bar member that is not deformed, the cross bar member is wound and fixed, and then deformed. This is a base element member.

Further, according to another aspect of the present invention, a plurality of the base element members are arranged at a predetermined interval, and a crossbar member is wound and fixed around the base element members to form a combined element member.

According to another aspect of the present invention, the modified main bar member, the base element member, or the combined element member is embedded in a cement material or a synthetic resin material as a reinforcing material to form a structural material. is there.

[0017]

In the modified main bar member of the present invention, the resin is attached to the outer peripheral surface of the main bar member in the form of protrusions, so that the surface of the fiber reinforcing material is made uneven by the resin, and Adhesion with cement-based materials or synthetic resin materials is improved.

Since the above-mentioned resin has improved thixotropic property, when it is adhered on the outer peripheral surface of the main bar member, the fluidity is improved by stirring or the like so that the resin flows out from the nozzle or the like and the outer periphery of the main bar member is improved. It can be attached in a pattern with any shape and arrangement on the surface, and after adhesion on the outer peripheral surface of the main bar member, it returns to a high viscosity state and fluidity decreases, and the shape of the protrusion collapses. Is prevented. As a result, the shape of the resin adhering to the outer peripheral surface of the main bar member can be made an appropriate shape according to the application.

In the base element member of the present invention, a plurality of deformed main bar members are arranged as a basic unit at predetermined intervals, or a plurality of non-deformed main bar members are arranged at predetermined intervals. A crossbar member is fixed by winding around it, and the main bar member that is not deformed is deformed after fixing the crossbar member by winding, so the deformed main bar member that is the basic unit is concrete or the like. Excellent adhesive action to the cement-based material or the synthetic resin material, and the existence of the crossbar member ensures the integration between the individual deformed main bar members.

In the combined element member of the present invention, a plurality of base element members are arranged at a predetermined interval, and a crossbar member is wound and fixed around the base element member. Therefore, a cement-based material such as concrete or a synthetic resin is used. It exerts an excellent adhesion action on the material and the crossbar members ensure the integrity of the individual base element members.

Therefore, the structural material in which the deformed main bar member, the base element member, or the combined element member is embedded as a reinforcing material in a cement material or a synthetic resin material has a significantly improved strength against tension, compression, and bending. To do.

[0022]

1 (A) to 1 (E) are perspective views showing a shape example of a deformed main bar member (1a) according to the present invention, in which (1) is a main bar member. ,
(2) indicates a resin.

The main bar member (1) is a linear or rod-shaped member having a predetermined cross-sectional shape (circular, elliptical, rectangular, chrysanthemum, etc.) which is obtained by merging a plurality of continuous fibers and impregnating and curing the resin and passing through a die. The outer diameter is appropriately set according to the application.

The fibers which compose the main bar member (1) may be continuous fibers, and their combined state does not matter. For example, multifilaments, tows, strands, rovings, etc. It may be in any state such as a braid, and may be spun yarn.

The fibers used are carbon fibers, glass fibers,
There are aramid fiber, polyester fiber, vinylon fiber and the like.

The resin that is impregnated into the fibers and cured may be either thermosetting or thermoplastic, and examples thereof include epoxy resins, unsaturated polyester resins, vinyl chloride resins, and silicone rubber resins.

The resin (2) is bonded in a protruding shape on the outer peripheral surface of the main bar member (1) to form the deformed main bar member (1a). The deformed main bar member has irregularities formed on the outer peripheral surface of the main bar member (1) to improve the adhesion to concrete or the like. It is preferable to use the same resin as the resin (2) impregnated into the continuous fiber of the main bar member (1) from the viewpoint of improving the adhesive strength, but the resin is not necessarily limited thereto. Then, the resin (2) is mixed with an appropriate amount of a substance that improves thixotropy of the resin, whereby the resin (2) adhered onto the outer surface of the main bar member (1) is liable to be dripped. Prevents the shape of the protrusion from collapsing. Examples of the substance that improves thixotropy include colloidal silica (trade name Aerosil), special carbon black (acetylene black, Ketjen black), and asbestos.

FIG. 1 (A) shows a resin (2) bonded in a zigzag line shape to the upper half portion and the lower half portion of the main bar member (1), and (B) shows the main bar member. The resin (2) is adhered to the outer peripheral surface of (1) in an oblique spiral line shape, and (C) shows the resin (2) discontinuous spiral line on the outer peripheral surface of the main bar member (1). (D) is obtained by adhering the resin (2) on the outer peripheral surface of the main bar member (1) in the form of discontinuous points, and (E) is
The deformed main bar member (1a) is formed by bonding the resin (2) to the outer peripheral surface of the main bar member (1) in an annular shape at equal intervals. The shape of the deformed main bar member (1a) is not limited to the above, and may be various shapes depending on the application. Further, the adhesion amount of the resin (2) is set according to the outer diameter of the main bar member (1) and the application.

Resin (2) for the main bar member (1)
2, the resin (2) supplied from the resin tank (10) by the pump (11) via the supply pipe (12) is adhered to the nozzle (13) at the tip of the supply pipe (12), for example. ) From the main bar member (1) to the main bar member (1), and at this time, one or both of the main bar member (1) and the nozzle (13) are moved in the longitudinal direction and the circumferential direction (or the lateral direction) of the main bar member (1). 1) and (B) of FIG. 1 can be continuously formed. In addition, (C) and (D) of FIG.
(E) is near the tip of the nozzle (13) or the supply pipe (12)
An on-off valve (not shown) may be installed in the middle of the process, etc., and the on-off valve may be appropriately controlled to open and close.
At that time, the operation of the pump (11) is interlocked with ON-OF.
You may make it F. Further, the resin (2) may be adhered to the main bar member (1) using an application roller, or the resin may be adhered in a linear shape, a dot shape, or a lump shape with a nozzle or a mold.

3 and 4 show a base element member (BE) and a combined element member (C) according to the present invention.
FIG. 6B is a perspective view showing a shape example of E), in which FIG.
(3) (3a) is a crossbar member.

The base element member (BE) is formed by arranging the two deformed main bar members (1a) described above in parallel at a predetermined interval and winding and fixing the cross bar member (3) around them. It In this case, two non-deformed main bar members (1a) are arranged in parallel at a predetermined interval, a cross bar member (3) is wound around and fixed to them, and then the main bar member (1a) is As shown in FIG. 5, the base element member (BE) may be formed by deforming.
The non-deformed main bar member (1a) means the main bar member (1a) in a state where the resin (2) is not adhered to the outer peripheral surface in FIG.

In FIG. 4, the four elements shown in FIG. 3 are arranged laterally at a predetermined interval, and the entire periphery of these elements is wound and fixed by another crossbar member (3a) to form the combined element member (CE). It is composed. The number and arrangement of the base element members (BE) to be used are not limited to the example shown in the figure, and the number and arrangement of the base elements (BE) suitable for the purpose of use are selected.

The crossbar members (3) and (3a) can be formed into a tape shape with a resin similar to the above-mentioned resin (2), or can be formed into a tape shape with another resin. Reinforcing fibers in the form of continuous fibers in the resin, or
It can be mixed in a chopped form. The crossbar members (3) and (3a) may have a shape other than the tape shape.

Base element member (BE) shown in FIG.
For example, as shown in (A) and (B) of FIG. 6, the production of the resin is performed by pulling out a plurality of continuous fibers (O) from the beams (15) and (15) which are aligned and wound in parallel, and a resin tank ( 16) Immerse the resin in (16) to impregnate it with resin, make it into a predetermined cross-sectional shape through a shaping die (17), and cure it through a first heat curing device (18) to prepare main bar members (1) (1). Then, the resin supply device (19) (19) is used to appropriately adhere the above-mentioned resin (not shown) to the outer peripheral surface of the main bar member (1) (1).
Create the deformed main bar member (1a) (1a) of the book,
The crossbar member (3) is wound by the crossbar winding device (20) around the outer periphery of the two deformed main bar members (1a) (1a), and is cured and fixed through the second heat curing device (21). Then, a base element member (BE) is created, and this is taken up by a take-up device (22), and a cutting device (2
In 3), it is cut to an appropriate length and carried out by a conveyor (24). The take-up device (22) has, for example, two sets of chuck members (25) (25).
5) It is configured such that (25) is alternately reciprocated, and the base element member (BE) is chucked and moved in the carry-out direction during the outward movement. The crossbar winding device (20) has, for example, a continuous fiber reel (20b) and a resin impregnating device (20c) installed on a swivel disc (20a).
The continuous fiber fed from b) is impregnated with resin by a resin impregnation device (20c), and then two modified main bar members (1
a) It is configured to be supplied to the outer peripheral portion of (1a) and to be wound by the turning motion of the turning disk (20a). Further, the resin supply devices (19) and (19) have the same configuration as that of the above-described configuration shown in FIG.

In the production of the combined element member (CE) shown in FIG. 4, the required number of the base element members (BE) produced by the apparatus shown in FIG. The cross bar member (3
It is configured so that a) is wound and cured by heating. still,
The resin supply device (1
It is also possible to arrange 9) after winding the crossbar member.

Next, the modified main bar member (1
The following tests were conducted to confirm the adhesion performance of the concrete of a).

The modified main bar member (1a) is composed of the main bar member (1) carbon fiber 12K × 104 pieces (1
K: 7 μm x 1000 pieces) Resin epoxy resin Resin (2) Main bar member (1) with improved thixotropy of resin

A main bar member (1) having a diameter of 10 mm is formed through a die, and the resin (2) is adhered by the apparatus shown in FIG. 2 and heat-cured to obtain a modified main body having the structure shown in FIG. A bar member (1a) was created. As shown in FIG. 7A, concrete (30) is adhered to the deformed main bar member (1a), the concrete (30) is supported by a supporting member (31), and a tensile load is applied downward. Then, a pull-out test was performed. In addition, in order to prevent splitting of the concrete (30), a reinforcing spiral bar (32) made of φ6 mm round steel is arranged in the concrete (30). As a comparative example, as shown in FIG. 7 (B), the test was carried out by adjusting the amount of resin on the surface of the carbon fiber reinforced resin rod having a smooth surface of φ8 mm (referred to as Comparative Example 1) and the rod. As shown in (C) of 7,
Using a φ10 mm rod (referred to as Comparative Example 2) in which the specific surface area of the rod surface was increased, concrete (3
0) was made to adhere and the pull-out test was done similarly.

The test results are shown in Table 1 below.
It was confirmed that the products of the present invention, which had been subjected to the modification treatment, had a considerably increased maximum bond strength as compared with those of Nos. 1 and 2. The value of the adhesive strength is considered to be a sufficient value required for the reinforcing material of the concrete member. Also, since the adhesive strength depends strongly on the deformed pitch and the bonding area of the rod,
It is technically possible to obtain a higher bond strength.
On the other hand, in the modified treatment shown in the product of the present invention, the maximum bond strength is achieved in a small region where the slip of the free end (the end protruding above the concrete) is about 0.05 mm or less, which is advantageous in terms of bond performance. Was confirmed. The above test is for concrete, but the same adhesion performance can be expected when applied to a reinforcing material made of a resin material.

[0040]

[Table 1]

From the above results, the base element member (BE) and the combined element member (C) of the present invention
With regard to E), the improvement of the adhesion performance can be expected sufficiently.

[0042]

According to the first aspect of the present invention, the resin adhered to the outer peripheral surface of the main bar member allows the main bar member to have a different shape to improve the adhesion performance to concrete and the like. Since the continuous fibers in the main bar member are not adversely affected, there is no fear of strength reduction. Moreover,
The resin can be attached to the main bar member later, the shape can be easily changed, there are no restrictions on the shape, various variations can be adopted, and it is not necessary to continue, so only the necessary parts are processed. Moreover, since it is not spirally wound, for example, it is possible to prevent the occurrence of rotational stress when the tensile stress acts. Further, since the resin is simply attached to the main bar member, the device is simple, suitable for continuous production, and can be manufactured at low cost.

According to the second and third aspects of the present invention, the performance of adhering to concrete or the like is further improved, and the shape and strength suitable for the application can be easily imparted.

According to the fourth aspect of the present invention, a structural material which is excellent in adhesion performance with concrete or resin material and which can face stress in each direction such as compression, tension, shearing, bending and peeling is provided at low cost. It is also possible to provide a lightweight structural material that is free from the risk of corrosion due to neutralization of concrete due to chloride or carbon dioxide infiltration and deterioration due to electrolytic corrosion due to stray current.

[Brief description of drawings]

1A to 1E are perspective views showing examples of the shape of a fiber reinforcing material according to the present invention.

FIG. 2 is a schematic explanatory view showing an example of a fiber reinforcing material manufacturing apparatus according to the present invention.

FIG. 3 is a perspective view showing an example of a composite fiber reinforcing material according to the present invention.

FIG. 4 is a perspective view showing another example of a composite fiber reinforcing material according to the present invention.

FIG. 5 is a perspective view showing still another example of the composite fiber reinforcing material according to the present invention.

FIG. 6A is a schematic plan view showing an example of an apparatus for manufacturing a structural material according to the present invention, and FIG. 6B is a side view thereof.

FIG. 7A is a schematic explanatory view of a pull-out test device,
(B) and (c) show the cross-sectional shape of the conventional fiber reinforcing material used as a comparative example with the product of the present invention.

[Explanation of symbols]

 1 Main bar member 1a Deformed main bar member 2 Resin 3,3a Cross bar member BE Base element member CE Combined element member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiyoshi Eiyoshi 2-5-14 Minamisuna, Koto-ku, Tokyo Inside the Takenaka Corporation Technical Research Institute (72) Inventor Toshio Yonezawa 2-chome, Minamisuna, Koto-ku, Tokyo No. 14 Incorporated Takenaka Corporation Technical Research Institute (72) Inventor Tadahiro Kakizawa 2-5-14 Minamisuna, Koto-ku, Tokyo Incorporated Takenaka Industrial Engineering Laboratory (72) Inventor Tomoyuki Fukada Kyoto City, Kyoto Prefecture 28, Ichijoji-cho, Sakyo-ku 28 (72) Inventor, Kazuhiro Inoue 938 Nakatomi-cho, Kasai City, Hyogo Prefecture (72) Inventor, Ryoichi Okamoto 1-1-15 Haramachi, Suita-shi, Osaka Prefecture 297, Kitamachi, City

Claims (4)

[Claims] 1. A modified main bar in which a resin having improved thixotropy is attached in a protrusion shape on the outer peripheral surface of a linear or rod-shaped main bar member obtained by merging a plurality of continuous fibers and impregnating and hardening the resin. A fiber reinforcing material comprising a member. 2. The deformed main bar member according to claim 1 is used as a basic unit, and a plurality of the deformed main bar members are arranged in parallel at predetermined intervals, or a plurality of non-deformed main bar members are arranged. The main bar members are arranged in parallel at a predetermined interval, and the crossbar members are wound and fixed around the plurality of main bar members. For the main bar members that are not deformed, the crossbar members are wound and fixed, and then deformed to form the base element. A fiber reinforcing material characterized by comprising a member. 3. A fiber reinforcing material comprising a plurality of base element members according to claim 2 arranged at predetermined intervals, and a crossbar member wound around and fixed to the crossbar member to form a combined element member. 4. The modified main bar member according to claim 1, the base element member according to claim 2, or the combined element member according to claim 3 is disposed as a reinforcing material in a cement material or a synthetic resin material. Characteristic structural material.