JPH11229353A - Reinforcing sheet for civil engineering work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing sheet for civil engineering work, having high strength while keeping a needed degree of opening needed even when impregnated with asphalt or a resin. SOLUTION: This sheet is made of a fabric in which a plurality of glass long fibers 2,... and a plurality of glass long fibers 3,... aligned in a direction perpendicular thereto are woven together. The glass long fibers 2,... are arranged in groups of plural ones each, in which the fibers 2 are arranged in proximity to one another, so that portions 5 where groups of broad convergent fiber groups converged like leno weaving are present and portions 6 where no glass long fibers 3 are present are formed alternately. The latter glass long fibers 3,... are aligned at equal intervals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing sheet for civil engineering, such as a reinforcing core material for an asphalt mat for preventing settlement and a reinforcing material for asphalt pavement for roads, which are used as a foundation for breakwaters or the like in construction of harbors, seawalls and the like. Things.

[0002]

2. Description of the Related Art In general, glass cloth is used as a reinforcing sheet for civil engineering, such as a reinforcing core material for asphalt mat for preventing settlement and a reinforcing material for asphalt pavement for roads, which are used for foundations such as breakwaters in construction of harbors and seawalls. However, the performance of glass cloth can be sufficiently satisfied by plain weave, twill weave, satin weave, or simple leno weave for the performance conventionally required. However,
In addition, high-performance asphalt mat reinforcing core materials and civil engineering reinforcing sheets such as road asphalt pavement reinforcing materials are required, and glass cloth as this reinforcing material is also required to dramatically increase the strength. However, it has become impossible to cope with the conventional extension of glass cloth.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a reinforcing sheet for civil engineering having high strength while maintaining a required opening degree even when impregnated with asphalt or resin. It is the purpose.

[0004]

The reinforcing sheet for civil engineering according to the present invention is a woven fabric woven of a plurality of long glass fibers and a plurality of long glass fibers arranged in a direction perpendicular to the long fibers. In the former, the long glass fiber yarns are arranged in close proximity to each other by a plurality of yarns, and a portion forming a wide-width bundled yarn bundle entangled in a woven shape by a tangling yarn and a portion where the glass long fiber yarn does not exist alternately. The long glass fiber yarns are arranged so as to be formed at intervals.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a reinforcing sheet for civil engineering, which is composed of a plurality of long glass fiber yarns 2,... And a plurality of long glass fiber yarns 3,. It is a woven fabric.

The glass long fiber used in the present invention is 3 to 2
A glass fiber having a fiber diameter of 5 μm is desirable, and a glass fiber of 200 to 20,000 fibers is desirable. The number of twists is desirably 0 to 1.0 turns / 25 mm. This makes it possible to reduce the thickness to 3 mm or less.

The former glass long fiber yarns 2,... Forming the reinforcing sheet 1 for civil engineering are arranged close to each other by a plurality of yarns, and are entangled with the entanglement yarns 4 to form a group of wide bundled yarns. 5 and the portions 6 where the glass filament fibers do not exist are arranged alternately, and the glass filament fibers 3,..., Are arranged at regular intervals of about 0.5 to 3 cm. And are arranged.

The width of the portion 5 forming the wide bundle of the bundled yarns is 2
The width is desirably 5 to 60 mm, and the width interval is desirably 25 mm or more. The strength of the wide bunched yarn group is 50
It is desirable to set it to 0 to 2000 kg / 25 mm.

Since the portions 5 forming the wide bundles of the long glass fiber yarns 2,... Are bundled in the woven shape by the entanglement yarns 4, the lattice shape can be stably maintained without separation. As a result, asphalt can be easily injected to provide a high-strength civil engineering reinforcing sheet.

The entangled weaving by the entangled yarn 4 of the present invention can be various entangled weaves, and it is possible to use a single entangled yarn for a portion 5 forming one wide-width bundled yarn group. Alternatively, two or more entangled yarns may be used.

When one entangled yarn is used, the bundle is usually entangled so as to be entangled at both ends of a portion 5 forming one wide-shaped bunched yarn group, but when two entangled yarns are used,
After the two entangled yarns engage with the other glass long fiber yarns 3 at both ends of the portion 5 forming one wide-width bundled yarn group, the yarns advance in different directions, intersect at the center, and cross in the different directions. It is desirable to engage the other long glass fiber yarn 3 at both ends. In this case, it is desirable to perform engagement with the other glass long fiber yarns 3 at intervals of a plurality of yarns in order to prevent yarn breakage.

In the case where two or more entangled yarns are used, in addition to the above cases, only the two end edges of each of the portions 5 forming one wide-width bundled yarn group are entangled with one entanglement yarn 4 respectively. You may make it converge.

The entangled weave by the entanglement yarn 4 of the present invention may be a combination of the various entanglement weaves described above.
In addition to using glass long fibers, heat fusion may be performed using heat fusible fibers.

In the reinforcing sheet for civil engineering according to the present invention, the long glass fiber yarns 3 are arranged at intervals and only the long glass fiber yarns 2 are provided in the gaps at the intervals. Since it is easy to bend, it can be easily wound in a roll shape, and when transported or stored, it can be wound in a roll shape, and it can be used by drawing out only a necessary area for use and cutting.

As described above, the reinforcing sheet for civil engineering of the present invention requires a drastic increase in strength while maintaining the opening degree. The degree of opening is formed, and the whole bundle of warps is entangled with a thin glass yarn by a technique which has not been conventionally used so that the degree of opening does not change by post-processing.

Although the civil engineering reinforcing sheet of the present invention can be used as it is, it can be used after being impregnated and coated with a resin such as SBR or asphalt. This increases strength and
The asphalt adhesion is improved, and even if a part is cut during use, the cut portion does not fray.

In the reinforcing sheet for civil engineering of the present invention, two reinforcing sheets for civil engineering are formed such that glass long fiber yarns 2,... And glass long fiber yarns 3,. And by injecting molten asphalt from above, it is possible to obtain sufficient strength in both vertical and horizontal directions. The molten asphalt injected from above passes through the gap between the long glass fiber yarns 2, ... and the long glass fiber yarns 3, ... and becomes integrated with the lower molten asphalt, and the civil engineering reinforcing sheet is firmly fixed in the asphalt Will be done.

Since the reinforcing sheet for civil engineering of the present invention uses glass fiber, it has excellent strength and maintains a high degree of opening during transportation, storage, and production of asphalt mats. This makes it possible to produce a strong asphalt mat.

The civil engineering reinforcing sheet of the present invention can be used as follows. As an example, the asphalt base layer is laid on a subgrade, a roadbed layer, and a tack coat is scattered. A paved body can be formed. As another example, first, the foundation is maintained, the formwork is installed, the lower layer asphalt mastic is cast at 160 to 200 ° C., the degreasing wire for lifting is placed thereon, and the civil engineering work of the present invention is placed thereon. An asphalt mat for preventing scouring can be manufactured by laying two reinforcing sheets so that both warp yarns are orthogonal to each other and placing an upper asphalt mastic thereon.

[0021]

According to the present invention, the required opening degree is maintained even when impregnated with asphalt or resin,
Moreover, it is possible to provide a reinforcing sheet for civil engineering having high strength.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a civil engineering reinforcing sheet of the present invention.

FIG. 2 is an enlarged plan view of another example of the civil engineering reinforcing sheet of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforcement sheet for civil engineering 2 ... Glass long fiber yarn 3 ... Glass long fiber yarn 4 Entanglement yarn 5 A part which forms a group of wide bundled yarns 6 A place where there is no glass long fiber yarn

Continued on the front page. (72) Inventor Tadataka Higashi 2-12-9 Shibadaimon, Minato-ku, Tokyo Uniti Kagurasufibre Co., Ltd. Tokyo branch office (72) Inventor Ryosuke Shinbo 2-12-9 Shibadaimon, Minato-ku Tokyo Kagurasu Fiber Co., Ltd. Tokyo office

Claims (1)

[Claims] 1. A woven fabric comprising a plurality of long glass fiber threads and a plurality of long glass fiber threads arranged in a direction perpendicular to the plurality of long glass fiber threads. Are arranged in such a manner that the portions forming the wide-width bundled yarn group, which are bundled in a woven shape with the entangled yarn, and the portions where the glass filament fibers are not present are alternately formed, and the latter glass A reinforcing sheet for civil engineering, wherein long fiber yarns are arranged at intervals.