JPH06288100A - Repair method for concrete structure and repair material - Google Patents

Abstract

PURPOSE:To simplify a finish work, followed by repair of a concrete structure, without damaging a repair material. CONSTITUTION:In a method wherein a cloth-form fibers 2 for reinforcement having a strength higher than that of concrete is stuck on a concrete structure 1 to effect reinforcement, cloth-form fibers 2 are stuck on a reinforcement surface 1a of a concrete structure with a distance 3 therebetween. A repair material 6 prepared such that the fibers for reinforcement are superposed with a finishing plate 8, such as mortar and stones, is stuck on the distance 3 part and the precedingly stuck cloth-form fibers 2 for reinforcement are intercoupled through the fibers for reinforcement of the repair material 6. Thus, simultaneously with repair, a finishing work is carried out to shorten a work time. The finishing work is simply effected without damaging the repair material. Manufacture of the repair material wherein the fibers for reinforcement having a strength higher than that of concrete is superposed with the finishing material, such as mortar and a stone, is also facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing concrete beams and columns, concrete structures such as bridge piers and chimneys, and a repair material used for the repair.

[0002]

2. Description of the Related Art Conventionally, in the case of reinforcing an existing concrete structure as described above, as shown in FIG. 1, after a concrete structure a to be repaired is conditioned, a primer b is applied to the concrete structure a to make it aromatic. A method is known in which a repairing material c formed by weaving a reinforcing fiber having a tensile strength higher than that of concrete such as polyamide fiber, carbon fiber or glass fiber into a long cloth is wound, and further a coating material d is applied thereon. There is.

[0003]

In the above method, since the thin coating film of the coating material d having a thickness of several microns is present on the surface after the repair material c is wound, the repair material c is not sufficiently protected. , The durability after reinforcement is not certain. For that purpose, a protective cover may be further provided on the repair material c, but it is difficult to avoid this so as not to damage the repair material c.

An object of the present invention is to provide a method for easily performing a finishing work associated with the repair of a concrete structure without damaging the repair material, and to provide a repair material suitable for the method. .

[0005]

According to the present invention, there is provided a method for attaching a reinforcing fiber having a strength higher than that of concrete to a concrete structure to reinforce the concrete structure. A cloth-like reinforcing fiber is affixed, and a repair material obtained by polymerizing a finishing plate material such as mortar or stone on the reinforcing fiber is affixed to the spacing, and the reinforcing fiber of the repair material is used first. The above objects were achieved by connecting the attached cloth-like reinforcing fibers. As the reinforcing fiber, high strength fiber such as aromatic polyamide fiber, glass fiber or carbon fiber is used.

[0006]

The function is to treat the groundwork of the portion to be repaired of the concrete structure, apply the primer on the groundwork at an appropriate interval, and then apply the cloth-like reinforcing fiber thereto. Then, a primer is also applied to the gap portion, and a repair material obtained by polymerizing the reinforcing fiber and the finishing plate material is attached to substantially the entire reinforcing surface of the structure. The surface of the repairing material on the side of the reinforcing fiber is attached, but since the reinforcing fiber of this is continuously integrated with the previously attached reinforcing fiber when the primer is cured, the shearing force applied to the structure is increased. Performs a reinforcing action to withstand. Since the surface side of the repair material is covered with a finishing plate material, if it is attached, the reinforcing work and the finishing work are completed at the same time, and the work is completed easily and in a short time.

[0007]

Embodiments of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 1 indicates a concrete structure to be repaired, and its reinforcing surface 1a is provided with keren or the like to adjust the base. In order to attach the cloth-like reinforcing fibers 2 to the reinforcing surface 1a with a gap, the primer 4 is applied with a gap 3 between them. In this example, since the concrete structure 1 is a square column, the cloth-like reinforcing fibers 2 were attached to the business trip parts at the four corners. The reinforcing fiber 2 was formed into a cloth by weaving an aromatic polyamide fiber, a carbon fiber or a glass fiber having a higher tensile strength than concrete. Next, the space 5 and the cloth-like reinforcing fiber 2 that has been adhered are also coated with the primer 5, and the repair material 6 is adhered thereto. The repair material 6 is, as shown in FIG.
The inner surface has a structure in which a reinforcing fiber 7 similar to the cloth-like reinforcing fiber 2 and a finishing plate material 8 such as cement mortar, tile, or stone material are polymerized, and in the example shown in the figure, the flat plate has a square outer shape and its width. Was formed to fit the width dimension of the structure 1.

Since the cloth-like reinforcing fibers 2 are attached to the reinforcing surface 1a with a gap 3 therebetween, the work is relatively easy, and the repair material 6 attached so as to fill the gap 3 is When the primer is cured, the reinforcing fibers 7 on the back surface of the primer connect the cloth-like reinforcing fibers 2 and perform the shear reinforcing action of the structure 1. Further, since the finishing plate material 8 is superposed on the surface side of the repair material 6, the finishing work progresses at the same time as the reinforcing work, no special finishing is required, and the reinforcing fibers 2 and 7 are damaged due to the finishing. Since it does not happen, work can be done safely and in a short time. The thickness of the finishing plate 8 is several mm to several cm
Are preferred.

Explaining a concrete example of the present invention, when the concrete structure 1 is a prism of 30 × 30 cm and length of 3 m, the surface of the concrete structure 1 is adjusted to be a primer, and the primer 4 is placed 10 cm to the left and right of each reinforcing surface 1a. Apply with a width of 4m at the corner,
A cloth of reinforcing fiber 2 of aromatic polyamide fiber having a width of 20 cm was attached. Interval 3 is 10 cm. Then reinforcing fiber 2
Apply primer 5 to the top and space 3 and apply 30 × 30 to it.
The cm-shaped repair material 6 was attached. The reinforcing fiber 7 of the repair material 6 is a cloth-woven aromatic polyamide fiber,
A product obtained by polymerizing a finishing plate material 8 of 10 mm cement mortar was used. The time required for the above reinforcing work was 3 hours.

[0010]

As described above, according to the present invention, cloth-like reinforcing fibers are adhered to the reinforcing surface of a concrete structure at intervals, and reinforced with mortar or the like at the intervals. The repair material obtained by polymerizing the finishing plate material is attached, and the cloth-like reinforcing fibers previously attached are connected by the reinforcing fibers of the repair material, so that the finishing work can be performed simultaneously with the repair work. Has the effect of shortening the finishing work and making it possible to easily carry out the finishing work without damaging the repair material.A repair material made by superposing a finishing plate material such as mortar or stone on cloth-like reinforcing fibers with higher strength than concrete It is easy to manufacture and can be obtained at low cost.

[Brief description of drawings]

FIG. 1 is an explanatory view of steps of a conventional reinforcing method.

FIG. 2 is an explanatory diagram of an embodiment of the present invention.

FIG. 3 is a perspective view of a repair material used in the method of the present invention.

[Explanation of symbols]

 1 Concrete structure 1a Reinforcing surface 2, 7 Reinforcing fiber 3 Spacing 4, 5 Primer 6 Repair material 8 Finishing plate material

Claims (3)

[Claims] 1. A method for adhering a fabric-like reinforcing fiber having a strength higher than that of concrete to a concrete structure to reinforce the concrete structure. Affixing fibers, and affixing a repair material obtained by polymerizing a finishing plate material such as mortar or stone to the reinforcing fibers at the intervals,
A method for repairing a concrete structure, characterized in that the reinforcing fibers of the repair material are connected to each other of the cloth-like reinforcing fibers previously attached. 2. The method for repairing a concrete structure according to claim 1, wherein the reinforcing fibers are high strength fibers such as aromatic polyamide fibers, glass fibers and carbon fibers. 3. A repair material for a concrete structure, characterized in that a finishing plate material such as mortar or stone is polymerized with a cloth-like reinforcing fiber having higher strength than concrete.