KR20130078996A - Reinforcing fiber and asphalt composition using the same - Google Patents
Reinforcing fiber and asphalt composition using the same Download PDFInfo
- Publication number
- KR20130078996A KR20130078996A KR1020120000203A KR20120000203A KR20130078996A KR 20130078996 A KR20130078996 A KR 20130078996A KR 1020120000203 A KR1020120000203 A KR 1020120000203A KR 20120000203 A KR20120000203 A KR 20120000203A KR 20130078996 A KR20130078996 A KR 20130078996A
- Authority
- KR
- South Korea
- Prior art keywords
- reinforcing fiber
- aggregate
- asphalt mixture
- fiber
- fiber reinforced
- Prior art date
Links
Images
Classifications
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/16—Reinforcements
- E01C11/165—Reinforcements particularly for bituminous or rubber- or plastic-bound pavings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C2201/00—Paving elements
- E01C2201/16—Elements joined together
- E01C2201/167—Elements joined together by reinforcement or mesh
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Road Paving Structures (AREA)
Abstract
Description
The present invention relates to the field of civil engineering, and in particular, to reinforcing fibers and asphalt mixtures using the same.
Asphalt road pavement is generally composed of a
When the
As road pavement is a member that is directly exposed to the vehicle load and various environmental conditions (freeze thaw, rain and ice melt) during the public period, various defects and damages frequently occur.
Representative failure forms that occur in asphalt pavement include rutting due to plastic deformation (FIG. 3A), fatigue cracks (FIG. 3B), and port holes (FIG. 3C).
Figure 4 shows the results of stress concentration analysis distributed inside the general package cross-section due to the external traffic load action, such failure is due to the repeated external load as shown in Figure 4 due to the repeated portion of the upper part of the package (usually the lowermost top layer) As the stress is excessively concentrated at 5 to 7 cm or 2 to 3 cm from the top, it progresses from that point and becomes outward.
Until now, various studies have been made to extend the service life of asphalt pavement, and representative methods include using chemical modifiers and lattice type geotextiles and straight polymer fibers.
The chemical modifier is a method of increasing the viscosity of an asphalt binder by melting petroleum (SBS: Styrene Butadiene Styrene or SBR: Styrene Butadiene Rubber) polymer particles in an asphalt binder.
Although this method has a beneficial effect on plastic deformation, it is difficult in practical application due to excessive cost, difficulty in quality control, increase of energy cost due to increase of mixture production temperature, and possibility of cracking due to brittleness of material at low temperature. have.
The method of using a grid-like geotextile is a method of laminating a geotextile woven in a grid form in the middle.
This method has the effect of reducing the reflection cracks transferred from the lower layer to the upper layer, but the construction process is complicated, the construction period is long, and the construction cost increases. In addition, the method of using a grid-like geotextile has a disadvantage that does not have adequate resistance to the largest concentrated stress or shear deformation occurs in the surface layer.
In case of straight polymer fiber, it is sometimes used in the asphalt mixture to reinforce the area where the greatest concentrated stress or shear deformation occurs inside the surface layer, but it is not effective because the bond performance between the straight polymer fiber and asphalt binder and aggregate is not stable. Toughness is difficult to reinforce.
The present invention was derived to solve the above problems, and effectively reduce fatigue cracking, plastic deformation and port hole damage caused by various vehicle loads and environmental loads on asphalt road pavement, and have economical and excellent physical properties. It is an object to provide a reinforcing fiber and a fiber reinforced asphalt mixture using the same.
In order to solve the above problems, the present invention is a linear structure
The
The longitudinal section of the
The longitudinal section of the
It is preferable that the cross section of the
The
The
Preferably, the thermoplastic nylon 6 resin has a melting point of 200 to 230 ° C., a tensile strength of 500 to 800 kgf / cm 2, a tensile elongation of 50 to 60%, an elastic modulus of 20,000 to 25,000 kgf / cm 2, and a specific gravity of 1.1 to 1.2. .
The present invention is the reinforcing
To be used for the surface layer, the coarse aggregate maximum dimension of the aggregate is 13mm, the length of the reinforcing
The reinforcing
It is preferable that the aggregate has a passage ratio of 40 to 55% by weight.
To be used in the intermediate layer, the coarse aggregate maximum dimension of the aggregate is 19mm, the length of the reinforcing
The reinforcing
It is preferable that the aggregate is 25-35% by weight of the eighth passage.
To be used in the base layer, the coarse aggregate maximum dimension of the aggregate is 25mm, the length of the reinforcing
The reinforcing
It is preferable that the aggregate is 25-35% by weight of the eighth passage.
The present invention provides a method for producing the fiber reinforced asphalt mixture, the dry bibim step of mixing the aggregate and the reinforcing
The dry bibim step is preferably performed for 10 to 20 seconds, and the wet bibim step is preferably performed for 20 to 30 seconds.
The present invention effectively reduces fatigue cracking, plastic deformation, and port hole breakage caused by various vehicle loads and environmental loads on asphalt road pavement, and provides reinforcing fibers and fiber-reinforced asphalt mixtures having the same physical properties. .
1,2 is a cross-sectional view of the asphalt pavement structure.
Figure 3 is a photograph of the broken form of the asphalt pavement structure.
4 is a schematic diagram of the stress distribution of the asphalt pavement structure.
5 is for explaining the embodiment of the present invention,
5 is a sectional view of a first embodiment of a reinforcing fiber.
6 is a sectional view of a second embodiment of a reinforcing fiber.
7 is a perspective view of a third embodiment of a reinforcing fiber.
8, 9 is a particle size distribution curve and a schematic diagram of the aggregate.
10 is a block diagram of an asphalt mixture production plan.
11 is a block diagram of an indoor mixture design of asphalt mixture.
12 is a graph of fatigue properties of asphalt mixtures.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in Figure 5, the reinforcing
The diameter of the
The
The
The
When the longitudinal section of the
To this end, it is preferable that the longitudinal section of the
The
It is not only excellent in strength but also has a melting point of 200 ~ 230 ℃, it is possible to maintain the shape without twisting or bowling (Balling) at a high temperature of 180 ~ 190 ℃ occurring during the manufacture and construction of asphalt mixture, There is an effect of increasing the inter-aggregate interstitial stress, inducing the bridge effect between aggregates, thereby increasing the shear strength and tensile strength of the asphalt mixture.
This also has the advantage that it can be easily produced reinforcing fibers of the desired shape by injection molding.
Table 1 shows the preferred physical properties of the thermoplastic nylon 6 resin used as a material of the reinforcing fiber according to the present invention.
Hereinafter, a specific configuration of a fiber reinforced asphalt mixture in which reinforcing fibers are mixed according to the present invention will be described.
Fiber reinforced asphalt mixture according to the present invention is basically, the reinforcing
In general, when the penetration of the asphalt binder is greater than 100, the viscosity of the asphalt binder is lowered, so that the required adhesion strength is not guaranteed. Therefore, the early plastic deformation is likely to occur. If the penetration is less than 50, the plastic binder may be advantageous due to the high viscosity. There is a limit in workability, workability and economic feasibility, and brittleness at low temperature is likely to cause cracks due to temperature changes.
Therefore, it is preferable to use the asphalt binder of 60-90 penetration.
Fiber reinforced asphalt mixtures with reinforcing fibers according to the present invention are expected to increase intermeshing intergranular stress, bridging effect between aggregates, toughness of asphalt mixtures, and roads using such fiber reinforced asphalt mixtures. In the case of paving, it is expected to have a beneficial effect in terms of construction convenience and economic efficiency as well as structural durability improvement effect by solving problems such as plastic deformation, fatigue cracking, and port hole breakage.
Fiber reinforced heating asphalt mixture according to the present invention can be used for the surface layer or base layer of the new asphalt road pavement, as well as can be used as an overlay layer material for repairing existing asphalt road pavement or plain concrete road pavement.
Particularly, when used for over-repairing in plain concrete road pavement with horizontal stripe, it is possible to expect the effects of noise reduction, flatness, ease of maintenance, and economic efficiency, which are advantages of general asphalt road pavement, and increase toughness due to fiber mixing. As a result, it is possible to expect the effect of suppressing the reflection crack that occurs mainly in the horizontal joint of the concrete pavement.
On the other hand, the fiber reinforced asphalt mixture according to the present invention should be mixed with each material, that is, asphalt binder, aggregate and fibers evenly distributed, and also have sufficient adhesion strength, shear strength and tensile strength.
When the amount of reinforcing fibers is increased more than an appropriate amount, it is difficult to mix the asphalt mixture and at the same time, it is difficult to increase the shear strength and tensile strength of the heated asphalt mixture due to expansion of the mixture when compacting the mixture.
The length of the reinforcing fibers should also be determined in consideration of the size of the aggregates contained in the asphalt mixture (the length that can span the neighboring aggregates and induce bridging effects between the aggregates).
Furthermore, the length and diameter of the reinforcing fiber, the diameter and mixing amount of the reinforcing part, and the size of the aggregate, depending on which part of the surface layer or asphalt base layer (including the intermediate layer and base layer) constituting the asphalt pavement structure And particle size should be different.
Table 2 shows the appropriate values according to the above.
That is, in the case of the surface layer, the coarse aggregate maximum size of the aggregate is 13mm, the length of the reinforcing
As for the aggregate, it is preferable to apply an aggregate particle size distribution with a compactness of 2.5 mm (No. 8) sieve passage rate of 40 to 55% by weight (Fig. 8).
In the case of the intermediate layer, the coarse aggregate maximum size of the aggregate is 19mm, the length of the reinforcing
As for the aggregate, it is preferable to apply an aggregate granularity distribution having a granulation degree of 25 to 35% by weight of 2.5 mm (No. 8) sieve passage (FIG. 9).
In the case of the base layer, the coarse aggregate maximum size of the aggregate is 25mm, the length of the reinforcing
As for the aggregate, it is preferable to apply an aggregate granularity distribution having a granulation degree of 25 to 35% by weight of 2.5 mm (No. 8) sieve passage (FIG. 9).
As such, larger amounts of longer fibers are used for the middle and base mixtures than for the surface layer mixture, which corresponds to the pore and aggregate size that occurs larger than the surface layer in the middle and base layers. And to maximize aggregate engagement by unit weight expression.
Hereinafter, a method for producing a fiber reinforced asphalt mixture according to the present invention will be described.
Basically, the reinforcing fibers and aggregates are added to the plant mixer, followed by a dry beam, and the asphalt binder is added to the mixers, and the mixture is heated and mixed at 170 to 180 ° C.
At this time, the reinforcing fibers and aggregates are first mixed in a plant mixer (dry bibeam) for 10 to 20 seconds, and then the asphalt binder is added to the plant mixer (wet bibeam) to proceed with a process of mixing for 20 to 30 seconds.
As described above, the present invention pre-mixes the reinforcing fibers and the aggregates with a dry beam, so that the reinforcing fibers are evenly dispersed in the asphalt mixture.
Specific manufacturing method is as follows.
First, the produced mixture is transported safely to the installation site in accordance with the installation time while maintaining the quality.At this time, temperature maintenance (150 ± 10 ℃) is important for maintaining the quality of the mixture. Carry it with proper use.
Subsequently, the mixture transported to the installation site should be installed on the road according to its use, and the surface dust and other impurities should be completely removed before installation, and care should be taken to maintain the temperature of the mixture at 145 ± 10 ° C.
On the other hand, when the surface to be installed is wet, or when contaminants, rainy weather or mist occurs, it is preferable to stop the construction when the temperature is below 5 ℃.
Prior to the plant production of the fiber reinforced heating asphalt mixture, a production plan should be established (FIG. 10), and subjected to an indoor blending design (FIG. 11).
Hereinafter, a test procedure and results for demonstrating excellent physical properties of the fiber reinforced asphalt mixture according to the present invention will be described.
In order to confirm the fatigue characteristics of the physical properties of the asphalt mixture according to the present invention, the fatigue test was performed after the asphalt mixture specimens were prepared to have the characteristics shown in Table 3.
The specimen was used in the nylon fiber of Table 1, and aggregates having the characteristics of Table 4 and Table 5 were used.
Example 1 of the present invention is a specimen containing 0.3% by weight of reinforcing fibers, Example 2 is a specimen containing 0.6% by weight of reinforcing fibers, Example 3 is a specimen containing 0.3% by weight of reinforcing fibers, Comparative Example Relates to specimens incorporating reinforcing fibers.
The fatigue characteristics of the specimens were confirmed by applying a fatigue load by a dynamic load of 1 Hz (one load per second) (FIG. 12).
As a result of the test, the embodiments of the present invention reached failure after about 4800 times or about 5700 load times, but the comparative example was confirmed that the break at about 3000 times to 4000 times 1/2 of the above.
In the above described the case where the reinforcing fiber according to the present invention is applied to the asphalt mixture as an example, it can be expected to achieve excellent performance even if it is mixed for reinforcement in cement concrete and other materials.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.
100: reinforcing fiber 110: main body
120: reinforcement
Claims (20)
Reinforcement parts 120 formed at both ends of the main body 110 to have a diameter larger than that of the main body 110;
Reinforcing fiber 100 containing.
The reinforcement part 120 is a reinforcing fiber 100, characterized in that the spherical structure.
Longitudinal section of the reinforcement portion 120 is a reinforcing fiber (100), characterized in that the diameter gradually increases toward the outside structure.
Longitudinal section of the reinforcement portion 120 is a reinforcing fiber 100, characterized in that the triangular structure.
Reinforcement fiber 100, characterized in that the cross section of the reinforcement portion 120 is a circular structure.
The main body 110 and the reinforcement portion 120 is a reinforcing fiber 100, characterized in that formed integrally by a thermoplastic synthetic resin material.
The main body 110 and the reinforcement portion 120 is a reinforcing fiber (100), characterized in that formed by a material containing a thermoplastic nylon 6 resin.
The thermoplastic nylon 6 resin
Reinforcing fiber 100, characterized in that the melting point 200 ~ 230 ℃, tensile strength 500 ~ 800 kgf / ㎠, tensile elongation 50 ~ 60%, elastic modulus 20,000 ~ 25,000 kgf / ㎠, specific gravity 1.1 ~ 1.2 .
Asphalt binder having a penetration of 60 to 90;
Aggregate;
Fiber reinforced asphalt mixture comprising a.
In order to use for the surface layer, the coarse aggregate maximum dimension of the aggregate is 13mm, the length of the reinforcing fiber 100 is fiber reinforced asphalt mixture, characterized in that 5 ~ 15mm.
The reinforcing fiber 100 is fiber reinforced asphalt mixture, characterized in that 0.05 to 0.15 parts by weight of the total mixed.
The aggregate is fiber reinforced asphalt mixture, characterized in that the pass rate of the eighth body is 40 to 55% by weight.
For use in the intermediate layer, the coarse aggregate maximum dimension of the aggregate is 19mm, the length of the reinforcing fiber 100 is fiber reinforced asphalt mixture, characterized in that 15 ~ 25mm.
The reinforcing fiber 100 is fiber reinforced asphalt mixture, characterized in that 0.15 ~ 0.25 parts by weight compared to the total.
The aggregate is fiber reinforced asphalt mixture, characterized in that the passing rate of the eighth body is 25 to 35% by weight.
To use in the base layer, the coarse aggregate maximum dimension of the aggregate is 25mm, the length of the reinforcing fiber 100 is fiber reinforced asphalt mixture, characterized in that 25 ~ 35mm.
The reinforcing fiber 100 is fiber reinforced asphalt mixture, characterized in that 0.3 to 0.4 parts by weight compared to the total.
The aggregate is fiber reinforced asphalt mixture, characterized in that the passing rate of the eighth body is 25 to 35% by weight.
Dry bibim step of mixing the aggregate and the reinforcing fiber 100 in a dry state;
Adding the asphalt binder to the mixed aggregate and reinforcing fiber 100 and wet bibim step of mixing while heating;
Method for producing a fiber reinforced asphalt mixture comprising a.
The dry bibim step is performed for 10 to 20 seconds, the wet bibim step is a method of manufacturing a fiber reinforced asphalt mixture, characterized in that performed for 20 to 30 seconds.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120000203A KR20130078996A (en) | 2012-01-02 | 2012-01-02 | Reinforcing fiber and asphalt composition using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120000203A KR20130078996A (en) | 2012-01-02 | 2012-01-02 | Reinforcing fiber and asphalt composition using the same |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20130078996A true KR20130078996A (en) | 2013-07-10 |
Family
ID=48991834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020120000203A KR20130078996A (en) | 2012-01-02 | 2012-01-02 | Reinforcing fiber and asphalt composition using the same |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR20130078996A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2466615A1 (en) * | 2014-05-06 | 2014-06-10 | Aglomerados Los Serranos, S.A. | Bituminous composition and its use to reduce vibrations, noise and as an anti-cracking and anti-crack mixture (Machine-translation by Google Translate, not legally binding) |
KR101455590B1 (en) * | 2014-02-21 | 2014-10-31 | 김영석 | Hybrid Fiber and Styrenic Thermoplastic Elastomer Modifier reinforced High Bond Asphalt Binder and Asphalt Composition |
KR102035564B1 (en) * | 2019-04-15 | 2019-10-23 | 이강문 | Road Constructing Method Using Curing Apparatus for asphalt |
CN114457643A (en) * | 2022-01-22 | 2022-05-10 | 中国建设基础设施有限公司 | High-performance steel fiber graded broken stone mixture and preparation method thereof |
-
2012
- 2012-01-02 KR KR1020120000203A patent/KR20130078996A/en active Search and Examination
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101455590B1 (en) * | 2014-02-21 | 2014-10-31 | 김영석 | Hybrid Fiber and Styrenic Thermoplastic Elastomer Modifier reinforced High Bond Asphalt Binder and Asphalt Composition |
ES2466615A1 (en) * | 2014-05-06 | 2014-06-10 | Aglomerados Los Serranos, S.A. | Bituminous composition and its use to reduce vibrations, noise and as an anti-cracking and anti-crack mixture (Machine-translation by Google Translate, not legally binding) |
KR102035564B1 (en) * | 2019-04-15 | 2019-10-23 | 이강문 | Road Constructing Method Using Curing Apparatus for asphalt |
CN114457643A (en) * | 2022-01-22 | 2022-05-10 | 中国建设基础设施有限公司 | High-performance steel fiber graded broken stone mixture and preparation method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Moreno-Navarro et al. | The use of additives for the improvement of the mechanical behavior of high modulus asphalt mixes | |
US9944797B2 (en) | Glass fiber-reinforced hot-mix asphalt mixture, and manufacturing method thereof | |
CN102002909B (en) | Pavement structure for cement concrete bridge deck and pavement method thereof | |
CN102535299B (en) | A kind of construction method of the stress absorbing layer for road rehabilitation | |
CN108277713A (en) | The roadbed laying structure and construction method extended for highway | |
CN101092808A (en) | Stress absorption structured llayer of discontinuous ajar particle distribution limit mixture for asphaltum with high viscosity | |
Bindu et al. | Influence of additives on the charactaristics of stone matrix asphalt | |
Taherkhani | Investigating the effects of nanoclay and nylon fibers on the mechanical properties of asphalt concrete | |
CN102746822A (en) | Polymer asphalt based waterproof adhesive material and preparation process and construction process thereof | |
KR20130078996A (en) | Reinforcing fiber and asphalt composition using the same | |
CN106835973A (en) | Fleece superhigh tenacity cement-base composite material combined bridge deck structure and method | |
JP5457777B2 (en) | Waterproofing method for concrete floor slabs | |
KR100933302B1 (en) | Bicomponent synthetic fiber for hot-mix asphalt, fiber reinforced hot-mix asphalt mixture and production method of the asphalt mixture | |
CN103696366A (en) | Pavement structure and pavement method of combined steel bridge deck | |
Ismael et al. | Reinforcement of asphalt concrete by polyester fibers to improve flexural bending fatigue resistance | |
CN111304994B (en) | Semi-flexible functional combined structure recovery layer applied to asphalt pavement maintenance | |
US20200263035A1 (en) | TIRE-RUBBER AND FIBER REINFORCED HIGH PERFORMANCE ASPHALT COMPOSITE (RuFiAC) | |
CN111056769A (en) | Carbon fiber asphalt mixture | |
CN107840600B (en) | Durable self-flowing asphalt mixture and construction method in hardening of rail transit pavement | |
CN106082742A (en) | A kind of cement original washing powder and in the application of cement concrete and application in highway construction thereof | |
KR101354070B1 (en) | Normal temperature ascon composition with high strength | |
CN202323706U (en) | Repair structure for epoxy asphalt pavement pit slot | |
CN114960331A (en) | Rigid-flexible composite pavement structure and construction method thereof | |
Al-Saadi et al. | Improvement of moisture susceptibility for asphalt mixture with ceramic fiber | |
CN108301321B (en) | Anticoagulant ice thin layer deck installation structure of permanent seal cooling lightweight and preparation method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
AMND | Amendment | ||
E90F | Notification of reason for final refusal | ||
AMND | Amendment | ||
E601 | Decision to refuse application | ||
AMND | Amendment | ||
E801 | Decision on dismissal of amendment |