JPH04360944A - Reinforcing material for column member - Google Patents

Abstract

PURPOSE:To obtain the reinforcing material of a column member excellent in winding-up workability by containing non-hardened bonding agent contained in the breakable vessel of a micro-capsule or the like, in the hollow section of a hollow braided-rope-shaped reinforcing fiber body. CONSTITUTION:The fiber bundles 3 of the reinforcing fibers of aromatic polyamid fibers 2 or the like are formed in the shapes of hollow braided ropes of circular braids, square braids, flat braids, or the like, and a hollow braided- rope-shaped reinforcing fiber body 1 is composed. After that, in the hollow section 4 of the reinforcing fiber body 1, non-hardened bonding agent 5 contained in the breakable vessels of micro-capsules 6, 6 or the like is contained, and reinforcing material is composed. When a column member is wound up with the reinforcing material to be spiral-shaped, then by the winding pressure, the micro-capsules 6 are broken, and the non-hardend bonding agent oozes, and the hollow rope-shaped reinforcing fiber body 1 is impregnated with the agent, and the column member is effectively reinforced.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing material used for reinforcing column members such as bridge piers and building columns.

0002

[Prior Art] Conventionally, for example, when reinforcing a damaged column member or when reinforcing a column member due to an increase in load, reinforcing bars or the like have been used as reinforcing materials, and they are wrapped around the column member in a spiral pattern. The pillar members were reinforced.

0003

[Problems to be Solved by the Invention] The conventional reinforcing bars have problems such as being bulky and prone to corrosion.

[0004] Therefore, instead of reinforcing steel, we have developed a structural material in which reinforcing fibers such as aromatic polyamide fibers and carbon fibers are knitted into a braid-like reinforcing fiber body, and each reinforcing fiber is bound with a binder such as epoxy resin. It has been considered to be used as an alternative reinforcing bar, but if each reinforcing fiber is tied together with a binder, the rigidity of the structural material will be too high, making it difficult to wrap it around column members. It is also possible to wrap the reinforcing fibers around a column member and then impregnate the braided reinforcing fibers with a binder, but such impregnation work is also troublesome and has problems in workability.

[0005] An object of the present invention is to solve such conventional problems and provide a reinforcing material for a column member that has good winding workability.

[0006]

[Means for Solving the Problems] The reinforcing material for a column member of the present invention is a reinforcing material for reinforcing the column member by wrapping it around the column member, and includes an uncured binder in the hollow part of a hollow braided reinforcing fiber body. It is characterized by accommodating.

[0007] Furthermore, it is preferable that the uncured binder is stored in an easily breakable container such as a microcapsule.

[0008] The reinforcing fibers constituting the hollow braided reinforcing fiber body are usually those having a tensile strength of 100 kg/mm2 or more, such as inorganic fibers such as carbon fibers, glass fibers, and ceramic fibers, aromatic polyamide fibers, Organic fibers such as polyester fibers, high strength polyolefin fibers, strong polyamide fibers, strong polyvinyl alcohol fibers,
These can be used alone or in combination.

[0009] The reinforcing fiber body is constructed by knitting fiber bundles of the reinforcing fibers into various hollow braid shapes such as round braid, square braid, and flat braid.

[0010] The binder to be accommodated in the hollow part of the hollow braided reinforcing fiber body may be any one of epoxy type, polyester type, vinyl ester type, phenol type, polyimide type, alkali metal silicate type, colloidal silica type, etc. .

[0011] The binder is preferably contained in a microcapsule in which each component of a two-liquid separation type epoxy resin is separated into two chambers, for example.

0012

[Operation] When the reinforcing material of the present invention is wrapped around a column member, the uncured binder contained within the reinforcing material oozes out to the outside due to the winding pressure and is impregnated into the hollow braid-like reinforcing fiber body.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the reinforcing material of the present invention,
In the figure, 1 is a fiber bundle (strand) 3 of aromatic polyamide fiber 2, specifically 7 Kevlar-49 (strands),
A hollow braid-like reinforcing fiber body knitted into a hollow round string shape using a braid knitting machine is shown, and an uncured binder 5 is accommodated in the hollow portion 4 of the hollow braid-like reinforcing fiber body 1. The uncured binder 5
In this embodiment, a two-liquid separation type epoxy resin is used, and its components 5a and 5b are housed in a microcapsule 6 separated into two chambers 6a and 6b.

An example of the use of the reinforcing material of the present invention constructed as described above is shown in FIG. 2. When it is wound around the pillar member 10 in the same manner as before, the microcapsules 6 are destroyed by the winding pressure, and the microcapsules are The uncured binder 5 in 6 is impregnated into the hollow braided reinforcing fiber body 1.

Although not particularly shown in the drawings, it is preferable to spray mortar over the entire area where the reinforcing material is wrapped.

[0017]

As described above, according to the present invention, it is possible to provide a reinforcing material for a column member with good winding workability.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of a reinforcing material for a column member according to the present invention.

FIG. 2 is a perspective view showing an example of use of a reinforcing material for a column member according to the present invention.

[Explanation of symbols]

Claims (2)

[Claims] 1. A reinforcing material for reinforcing a pillar member by wrapping it around a pillar member, the reinforcing material for a pillar member being characterized in that an uncured binder is accommodated in the hollow part of a hollow braid-like reinforcing fiber body. . 2. The reinforcing material according to claim 1, wherein the uncured binder is contained in a breakable container.