JPH0515862B2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention is used as a substitute for reinforcing bars and PC steel wires that are buried in concrete structural materials with low tensile strength to strengthen the tensile strength of structures. related to structural materials.

(Prior art) Reinforcing bars have traditionally been known as this type of structural material, but they have problems with durability due to rusting, are difficult to bend and arrange, and have poor workability. This has the disadvantage of increasing the weight of the structure.

In order to solve this inconvenience, in the patent application of Japanese Patent Application Laid-Open No. 61-290150, the present applicant
A structural material has been proposed in which a plurality of bundled yarns made of long fibers with high tensile strength are knitted into a braid shape, and the long fibers are bound together.

(Problems to be Solved by the Invention) Since the structural material proposed above is knitted in the form of a braid, it has some unevenness on its surface, and when it is buried in a concrete structural material, the unevenness causes Frictional force is generated with the concrete, but in order to generate an even greater frictional force, it is desirable to construct it into an irregular structure with large irregularities.

The object of the present invention is to provide the above-mentioned proposed structural material with a modified structure so as to satisfy these demands.

(Means for Solving the Problems) In order to achieve this object, the present invention knits a plurality of bundled yarns made of long fibers having a higher tensile strength than concrete into a braid shape, and each long fiber In this structural material, bundled yarns of at least two or more different diameters are knitted in a structural material formed by binding together with a binder.

(Examples) Examples of the structural material of the present invention will be described below with reference to the accompanying drawings.

The drawing shows one embodiment of the structural material of the present invention, which includes a large-diameter aggregated yarn 2 made by bundling 24 long fibers 1 of aromatic polyamide fibers 1 of 1420 denier, and a fine yarn 2 made by bundling 8 of the long fibers 1. Four sets of bundled yarns 3 each having a different diameter are used, and these eight sets of bundled yarns 2 and 3 are knitted into a round string shape, and the long fibers 1 are bound to each other with an epoxy binder 4.

In the above embodiment, the diameters of the bundled yarns were set to two types, but
There is no particular limitation on the number as long as there are 2 or more types, such as 3 types, 4 types, etc.

Fibers with a tensile strength higher than that of concrete are used for each long fiber, and are not limited to the above-mentioned aromatic polyamide fibers, but include inorganic fibers such as glass fibers and ceramic fibers, carbon fibers, aromatic polyetheramides, and aromatic fibers. Organic fibers such as group polysulfamide amide, aromatic polysulfonamide, aromatic polyketone amide, aromatic polyamine amide, etc., metal fibers such as stainless steel fiber, etc. can also be used.

The structural material may be constructed so that all the assembled threads to be knitted are composed of the same type of long fibers,
Each set of yarns may be composed of different types of long fibers, or each set of yarns itself may be composed of different types of long fibers.

In addition, in addition to the above-mentioned circular braid-like formation,
It can be shaped like a square string, a flat string, etc. as desired.

As the binder 4, room temperature or thermosetting resin such as epoxy type, polyester type, vinyl ester type, phenol type, polyimide type, alkali metal silicate type, colloidal silica type, phosphate type, cement type, etc. Room temperature or heat curing organic
Inorganic composite materials etc. can be used.

In addition, on the outer peripheral surface of the structural material, a particle size of 100 μ to 2 mm is applied.
silicon dioxide, aluminum oxide, silicon carbide, tungsten, carbide, boron carbide,
By attaching inorganic powder such as jade and making the outer circumferential surface rough, the irregular shape effect of the structural material is reinforced.

(Effects of the Invention) As described above, according to the structural material of the present invention, a plurality of bundled yarns made of long fibers with a tensile strength higher than that of concrete are knitted into a braid shape, and each of the long fibers is bonded with a binder. In the structural material formed by bonding each other together, aggregate yarns of at least two different diameters are knitted, so that it is possible to extremely easily produce irregularly shaped structural materials with large irregularities. .

[Brief explanation of the drawing]

The drawing is a front view of an example of the structural material of the present invention. 1... Long fiber, 2, 3... Gathered yarn, 4... Binder.

Claims (1)

[Claims] 1. We knit multiple bundled yarns made of long fibers with a higher tensile strength than concrete into a braided cord.
A structural material formed by binding the long fibers to each other with a binder, characterized in that aggregate yarns of at least two or more diameters are knitted.