KR101636831B1 - Weaving type fiber reinforcement of improving impact resistance and blast resistance and cement composite structure using the same - Google Patents

Weaving type fiber reinforcement of improving impact resistance and blast resistance and cement composite structure using the same Download PDF

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Publication number
KR101636831B1
KR101636831B1 KR1020150070947A KR20150070947A KR101636831B1 KR 101636831 B1 KR101636831 B1 KR 101636831B1 KR 1020150070947 A KR1020150070947 A KR 1020150070947A KR 20150070947 A KR20150070947 A KR 20150070947A KR 101636831 B1 KR101636831 B1 KR 101636831B1
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South Korea
Prior art keywords
fiber
fibers
composite structure
reinforcing
explosion
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KR1020150070947A
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Korean (ko)
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전중규
김선길
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코오롱글로벌 주식회사
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E04C5/073—Discrete reinforcing elements, e.g. fibres
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/0048—Fibrous materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/04—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against air-raid or other war-like actions

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Civil Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Woven Fabrics (AREA)

Abstract

The present invention provides a fiber reinforced composite fiber reinforced fiber reinforced thermoplastic fiber reinforced thermoplastic fiber reinforced thermoplastic composite fiber, A dissipating portion composed of a plurality of second fibers twisted so as to form a gap in the upper and lower reinforcing portions; To a woven fiber reinforcement reinforced with an impact and explosion-proof performance.

Description

TECHNICAL FIELD The present invention relates to a woven fiber reinforced material reinforced with impact resistance and explosion proof performance, and a cement composite structure using the same,

The present invention is a lattice-like fiber having excellent adhesion strength to a cement matrix due to its structure and torsion-proofing, as well as a structure in which energy due to external impact and explosion is sufficiently buffered and dissipated, .

Generally, military facilities, nuclear power plants and national main facilities related structures should be resistant to external shocks and explosions. These external shocks and explosions are not safe zones against the collision caused by aircraft malfunction, particularly the South Korean confrontation situation and recent threats to terrorism. Therefore, it is necessary to strengthen the impact resistance against external shocks and explosions, Is important.

At present, it is suggested to increase the wall thickness to increase the thickness of the wall. It is not only economical to increase the wall thickness but also the durability of the temperature crack May occur.

As a technique for developing such a protection and explosion-proof function, Korean Patent Laid-Open Publication No. 10-2012-0014194 discloses a technique for protecting a first outer surface and a second outer surface, which is generally parallel to the first outer surface, Discloses a composite material comprising an inorganic ceramic matrix comprising a surface and at least one open weave glass fiber fabric disposed in an inorganic ceramic matrix between the first and second outer surfaces.

However, according to the above-described technique, there is a problem that the composite material has a deteriorated adhesive strength in the cement matrix. In addition, the energy for external shock and explosion can be buffered to a certain extent, Which is unsuitable as a reinforcing material for protection and explosion-proof.

Korean Patent Publication No. 10-2012-0014194

The present invention has been made to solve the problems of the prior art as described above, and it is an object of the present invention to provide a reinforcing material capable of sufficiently strengthening toughness with excellent adherence to a cement matrix and capable of sufficiently cushioning and dissipating energy for external impact and explosion I want to.

In order to accomplish the above object, the present invention provides a woven fabric reinforcing material reinforced by an impact and an explosion-proof performance, comprising: a pair of reinforcement parts forming a clearance up and down and woven to form a plurality of first fibers in a lattice shape; And a dissipating portion composed of a plurality of second fibers twisted to form a clearance of the upper and lower reinforcing portions.

As one example, the first fiber is composed of a plurality of fiber yarns in the same direction, and the second fiber is formed into a twisted shape of one fiber yarn and is attached to the first fiber at the upper and lower portions thereof and extends in the direction of the first fiber .

In one example, the first fiber is made of hydrophilic fiber and a coating layer is formed on the surface of the first fiber by a hydrophobic surfactant.

Preferably, the hydrophobic surfactant is one or a mixture selected from a polyoxyethylene stearyl ether derivative, a sorbitan fatty acid ester derivative, and a polyoxyethylene oleylamine derivative.

As an example, a gap is formed between a plurality of first fibers and a plurality of second fibers, and the gap is filled with foamed aluminum.

The cement composite structure of the present invention is characterized in that the reinforcing material is disposed between the cement matrixes.

As described above, the weft fiber reinforcing material reinforced with the impact and explosion-proofing properties according to the present invention is advantageous in that the toughness of the cement composite structure can be reinforced due to its strong adhesion to the cement matrix due to its structure.

In addition, the weft fiber reinforcing material reinforced with the impact and explosion-proofing properties according to the present invention is advantageous in that impact resistance is reinforced against external impact and energy dissipation is possible.

In addition, when the composite structure according to the present invention is applied, sufficient impact resistance and explosion-proof performance can be ensured while reducing the amount of SIMMETRIX-embedded styrene, which is economical.

Fig. 1 is a schematic view showing a woven fiber reinforcement reinforced by the impact and explosion-proof performance of the present invention,
Fig. 2 is a structural diagram showing the bonding relationship between the first fiber and the second fiber in the woven fiber reinforcement reinforced by the impact and explosion-proof performance of the present invention. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the weft fiber reinforcing member 1 reinforced with the impact and explosion-proofing performance according to the present invention has a pair of upper and lower reinforcing portions 2 in a lattice shape and a reinforcing portion 2 between the reinforcing portions 2, And a dissipation unit 3 fixed to form a clearance between the two electrodes 2. The reinforcing portion 2 serves to reinforce the tensile strength and the like in multiple directions in the composite structure. Particularly, the reinforcing portion 2 serves to mitigate the impact to the external impact by strengthening the impact resistance, and the dissipating portion 3 has a strong external impact It corresponds to a configuration in which energy is dissipated by deformation. Also, the reinforcing material 1 of the present invention is formed in a lattice shape as shown in FIG. 1 and is improved in adhesion to a cement matrix, so that the reinforcing material 1 is suitable for reinforcing the toughness of the composite structure.

The reinforcing portion 2 is characterized in that a plurality of first fibers 21 are woven in a lattice shape as shown in FIG. 1, and are made up of a pair of upper and lower fibers. Each of the reinforcement portions 2 is fixed in a state in which the clearance is formed by the dissipating portion 3.

The reason why the grid-like reinforced portion 2 is formed is to reinforce the tensile strength of the composite structure in the longitudinal and transverse directions (X, Y) which form a lattice in each of the reinforcing portions 2. For this purpose, the first fibers 21 are composed of a plurality of fiber yarns in the same direction so as to reinforce tensile strength and the like in the longitudinal and transverse directions X and Y, Various methods can be suggested in the construction, but a non-adhesion method is also preferable.

In addition, the first fibers 21 in the direction orthogonal to the reinforcing portion 2 (in the Z direction) serve to relieve the external impact primarily. That is, when the reinforcing portion 2 is embedded in a wall or the like of the composite structure, the reinforcing portion 2 mainly performs a function of reinforcing the tensile strength of the composite structure due to the overburden load or the like, It is possible to relieve the external load primarily.

The dissipating portion 3 corresponds to a configuration in which a plurality of second fibers 31 are formed in a twisted shape so that the upper and lower reinforcing portions 2 are fixed while forming a clearance. 1 and 2, a single fiber yarn is formed in a twisted shape, and the second fiber 31 is attached to the first fiber 21 under the upper and lower portions and extends in the direction of the first fiber 21 .

Particularly, the reason why the second fibers 31 form the clearance between the first fibers 21 is that when the explosion or the external impact is strong, the energy is reduced in the reinforcing portion 2, (In the Z direction) is generated in the portion of the second fiber 31 for energy exceeding the range that can be mitigated in the first fiber 31, thereby dissipating the energy and doubling the explosion-proof performance.

Here, various techniques can be applied to the first fiber 21 to form a clearance by the second fiber 31. In the first fiber 21 composed of a plurality of filaments, though not shown, The filaments cross each other at the fixing portion of the two fibers 31 and can be fixed by the frictional force.

Preferably, the second fiber 31 has a greater strength than the first fiber 21, so that the energy of a certain portion of the first fiber 21 is relaxed when the explosion and the external impact are generated. In addition, the second fibers 31 should be made of a plastic material.

That is, the first fiber 21 receives energy that can not be mitigated and must dissipate the energy in the process of plastic deformation. The material of the second fiber 31 is not limited, but it is preferable that the second fiber 31 is formed of one of a wire, a carbon fiber and an aramid fiber so that an energy dissipation function due to deformation is expressed.

In the present invention, as one example, the first fibers 21 are made of hydrophilic fibers to generate a strong bonding force with the cement so as to strengthen the toughness, and the surface of the first fibers 21 is coated with a hydrophobic surfactant Thereby providing an example of solving the problem of cutting the fiber by the bonding force which is too strong to improve the impact resistance.

That is, by adding the first fiber 21 made of hydrophilic fiber, the hydrogen bonding force with the cement paste is increased to strengthen the toughness. If the hydrogen bonding force is too large, the cement paste will have a too large binding force The surface of the first fiber 21 made of such a hydrophilic fiber is coated with a hydrophobic surfactant so that the surface of the first fiber 21 is treated with a hydrophilic surfactant to remove the inherent So as to enhance the impact resistance by allowing the elasticity to be exhibited as it is, and to be pulled out when a deformation due to a certain impact occurs.

The diameter of the first fibers 21 may range from 0.02 mm to 10 mm, more preferably from 0.2 mm to 0.6 mm. If the diameter is smaller than 0.2 mm, it is difficult for each of the first fibers 21 to exhibit toughness and impact resistance as a function to act in the cement paste. On the other hand, if the diameter exceeds 10 mm, It is structurally disadvantageous.

On the other hand, the hydrophobic surfactant may be selected from among polyoxyethylene stearyl ether derivatives, polyoxyethylene stearyl ether derivatives, sorbitan fatty acid ester derivatives and polyoxyethylene oleylamine derivatives. It is preferable that the hydrophobic surfactant forming such a coating layer has an HLB value of 3 to 10.

Here, the HLB value is a value indicating the characteristics of the surfactant, and is a value given to the balance between the hydrophilic group and the lipophilic group in the molecules of the surfactant. This value indicates the polarity of the molecules in an arbitrary range of 0.1 to 40. The larger the hydrophilicity, the larger the HLB value. On the contrary, the larger the lipophilic property, the smaller the HLB value.

When the HLB value of the hydrophobic surfactant is less than 3, there is a problem that the hydrophilic group is too small to be adhered to the reinforcing fiber composed of hydrophilic fibers. When the HLB value is more than 10, excessive hydrophilic groups cause strong hydrogen bonding with the cement. . In the present invention, the HLB value of the hydrophobic surfactant is preferably limited to 3 to 10.

The coating layer composed of the hydrophobic surfactant is preferably 0.5 to 2% by weight based on the total weight of the first fibers 21. If less than 0.5% by weight, the hydrophilic surfactant is too small to solve the problem of fiber cutting, , Hydrogen bonding with the cement paste is excessively inhibited, which is disadvantageous in terms of toughness and impact resistance.

On the other hand, the first fibers 21 are formed of a plurality of filaments, and air entangled to form a plurality of loops R on the surface thereof. Such a loop R improves the adhesion performance with the cement paste, It is desirable to strengthen the toughness in the structure. Here, the term "air entanglement" means that a matrix composed of a plurality of filaments is supplied into the air entraining device and the filaments are entangled by jetting high-pressure air.

Since loops are formed on the first fibers 21, the loops formed on the surface increase the contact area with the cement paste, can act as an anchor, and increase the friction characteristics. Therefore, will be.

Preferably, 100 to 1,000,000 loops (R) having a size of 0.01 to 2 mm are formed in the first fiber 21 per 1 m in length. The fiber fineness (mono fineness) of the filament for producing such an air entangled form is 0.5 to 10 denier and the total fineness is preferably 100 to 5,000 denier.

In the embodiment of the present invention, the reinforcing portion 2 is formed with a gap by the dissipating portion 3 so that a gap is formed between the plurality of first fibers 21 and the plurality of second fibers 31, The gap is filled with foamed aluminum.

The lattice-like reinforcing portion 2 and the dissipating portion 3 to be fixed to the lattice-like reinforcing portion 2 are formed in such a manner that the reinforcing portion 2 and the dissipating portion 3 are impregnated by the foamed aluminum, The reason for filling the foamed aluminum in this manner is that the shock is firstly buffered in the reinforcing portion 2 against the load caused by the external impact and the explosion, and the foamed aluminum is buffered secondarily, In order to double the impact and explosion-proof performance.

The reinforcing material mentioned above is placed inside the cement matrix in the composite structure, so that the reinforcing material of the present invention buffers and dissipates energy against the impact from the outside of the structure, thereby forming a safe explosion-proof structure.

On the other hand, in the case of the column, it is proper that the reinforcing member is configured to surround the longitudinal reinforcing bars when the reinforcing material is placed. The reason for this construction is that the reinforcing material has impact resistance and explosion-proof performance, and it is not necessary to dispose a separate spiral reinforcing bar and a reinforcing bar on the column, thereby achieving economical efficiency.

While the present invention has been described with reference to the particular embodiments and drawings, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and changes may be made.

1: Stiffener 2 of the present invention:
3: Dissipation

Claims (6)

A pair of reinforcing portions formed by weaving a plurality of first fibers in a lattice shape are provided so as to have a clearance therebetween,
And a dissipating portion formed of a plurality of second fibers provided between the pair of reinforcing portions so as to keep the reinforcing portions of the upper and lower reinforcing portions,
And the second fiber of the dissipating part is formed by twisting a single fiber yarn so that the upper and lower portions of the second fiber are attached to the upper and lower first fibers to extend in the direction of the first fiber. reinforcement.
The method according to claim 1,
Wherein the first fibers are composed of a plurality of fiber yarns in the same direction.
The method according to claim 1,
Wherein the first fiber is made of a hydrophilic fiber and a coating layer is formed on the surface of the first fiber by a hydrophobic surfactant.
The method of claim 3,
Wherein the hydrophobic surfactant is one or a mixture selected from polyoxyethylene stearyl ether derivatives, sorbitan fatty acid ester derivatives and polyoxyethylene oleylamine derivatives.
The method according to claim 1,
Wherein a gap is formed between the plurality of first fibers and the plurality of second fibers, and the gap is filled with foamed aluminum.
A cementitious composite structure according to any one of claims 1 to 5, wherein a woven fiber reinforcement reinforced by impact and explosion-proofing is disposed between cementitious matrices.
KR1020150070947A 2015-05-21 2015-05-21 Weaving type fiber reinforcement of improving impact resistance and blast resistance and cement composite structure using the same KR101636831B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180123959A (en) * 2018-03-20 2018-11-20 (주)콘텍이엔지 Concrete for emergency maintenance and method for constructing thereof
CN110005228A (en) * 2019-04-28 2019-07-12 西安航空学院 A kind of effective energy-absorbing explosive-proof protector section structure
KR102373322B1 (en) * 2021-10-26 2022-03-11 (주)신성엔지니어링 Recycling Aggregate asphalt paving method
KR102385382B1 (en) * 2021-10-26 2022-04-13 (주)신성엔지니어링 Repairing method for asphalt pavement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001162614A (en) * 1999-10-21 2001-06-19 Clark Schwebel Tech-Fab Co Structural member for reinforcing product made of curing structural material
KR101035001B1 (en) * 2010-03-12 2011-05-17 코오롱건설주식회사 A cement structure having hybrid fiber
KR20120014194A (en) 2009-05-04 2012-02-16 피피지 인더스트리즈 오하이오 인코포레이티드 Composite materials and applications thereof
KR101181005B1 (en) * 2011-01-11 2012-09-07 박종영 Composite Wall using Aluminum Foam Panel and Constructing Method thereof, and Shield Structure using such Composite Wall
KR101225821B1 (en) * 2011-06-30 2013-01-23 코오롱글로벌 주식회사 A Concrete Composite Having Fiber For Containment Building Of Nuclear Power Plant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001162614A (en) * 1999-10-21 2001-06-19 Clark Schwebel Tech-Fab Co Structural member for reinforcing product made of curing structural material
KR20120014194A (en) 2009-05-04 2012-02-16 피피지 인더스트리즈 오하이오 인코포레이티드 Composite materials and applications thereof
KR101035001B1 (en) * 2010-03-12 2011-05-17 코오롱건설주식회사 A cement structure having hybrid fiber
KR101181005B1 (en) * 2011-01-11 2012-09-07 박종영 Composite Wall using Aluminum Foam Panel and Constructing Method thereof, and Shield Structure using such Composite Wall
KR101225821B1 (en) * 2011-06-30 2013-01-23 코오롱글로벌 주식회사 A Concrete Composite Having Fiber For Containment Building Of Nuclear Power Plant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180123959A (en) * 2018-03-20 2018-11-20 (주)콘텍이엔지 Concrete for emergency maintenance and method for constructing thereof
KR102029186B1 (en) * 2018-03-20 2019-10-07 (주)콘텍이엔지 Concrete for emergency maintenance and method for constructing thereof
CN110005228A (en) * 2019-04-28 2019-07-12 西安航空学院 A kind of effective energy-absorbing explosive-proof protector section structure
KR102373322B1 (en) * 2021-10-26 2022-03-11 (주)신성엔지니어링 Recycling Aggregate asphalt paving method
KR102385382B1 (en) * 2021-10-26 2022-04-13 (주)신성엔지니어링 Repairing method for asphalt pavement

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