KR102179705B1 - Expansion joint for road structure and construction method thereof - Google Patents

Abstract

The present invention is a joint gap formed between adjacent slabs of a road structure; A channel formed by cutting the pavement layer above the joint gap to a predetermined width; A backup agent made of an elastic material having a predetermined elasticity and inserted into the joint gap; A binder plug filled in the joint gap above the backup agent; A support plate installed at the bottom of the channel to shield the upper part of the joint gap and having a width smaller than that of the channel; A primer applied to the inner surface of the channel including the support plate to a predetermined thickness; An elastic mixture filled in the channel to which the primer is applied; And a finish coating layer applied to the upper surface of the elastic mixture; including, wherein the elastic mixture is composed of 70 to 97% by weight of Indonesian natural asphalt and 3 to 30% by weight of the modifier composition, but the modifier composition is styrene-butadiene-styrene block copolymer A binder consisting of 10 to 200 parts by weight of an ethylene-vinyl-acetate polymer, 10 to 50 parts by weight of petroleum resin, and 10 to 100 parts by weight of a viscosity modifier per 100 parts by weight, and a single-grain aggregate composed of any one of basalt, sandstone, porphyry and granite Consists of
In the present invention, the crack resistance and adhesive performance of the elastic mixture are significantly increased, and plastic deformation resistance is improved, so that the tensile force and the compressive force can be effectively absorbed, as well as the separation between the pavement surface and the mixture can be suppressed as much as possible. By minimizing plastic deformation caused by it, the durability and stability of the joint can be improved.

Description

Expansion joint for road structure and construction method thereof

The present invention relates to an expansion joint for road structures such as roads, bridges and underpasses, and a construction method thereof, and more particularly, to a high elastic binder using natural asphalt and a styrene-butadiene-styrene copolymer (SBS) polymer, and a first grade. The use of a single-grain aggregate mixture greatly increases crack resistance and adhesion, and improves plastic deformation resistance, effectively absorbing tensile and compressive forces, and minimizing plastic deformation due to vehicle load, and its expansion joints and their It is about the construction method.

As is well known, most road structures such as bridges, underpasses and covered roads are made of so-called asphalt pavements covered with asphalt concrete slabs for excellent durability and convenient maintenance while ensuring safe and smooth driving of vehicles.

These roads are partially cracked by various factors such as repeated expansion and contraction according to seasonal temperature changes, creep and dry contraction of concrete, floating settlement of the ground, static and dynamic loads and unevenness of stress applied by vehicles, and aging. Cracks will occur.

If rainwater or the like penetrates into such a crack in the road, the crack becomes larger and eventually leads to damage to the road, leading to a huge obstacle to vehicle traffic and a very high risk of causing a safety accident.

Accordingly, road structures such as bridges and underground roadways form joint gaps at predetermined intervals between the upper plates to accommodate expansion and contraction due to temperature changes, and adjacent parts separated by this joint gap It is common to install so-called expansion joints to prevent foreign matter or rainwater from entering the interior between the two structures while promoting the safe operation of the vehicle by flexibly coping with the contraction and expansion of the upper plate as well as interconnecting the upper plates.

There are various types of expansion joints. For example, a channel of a certain width is formed at the upper part of the joint gap to ensure the continuity of the joint and smooth the expansion and contraction, and a mixture of asphalt sealant and aggregate is filled in the channel. The so-called asphalt plug joint type expansion joint technology was first introduced in U.S. Patent No. 4,324,504 and was widely used.

However, the expansion joint constructed with this technology does not effectively withstand the external shock applied to the joint gap, and the expansion joint is pushed into the joint gap, causing damage to the bridge top and dent of the expansion joint, and repeated vehicle impact There was a disadvantage of breaking the bond between the aggregate and the binder, resulting in damage to the joint.

As techniques for overcoming these disadvantages, U.S. Patent No. 5,024,554 and Korean Patent Registration No. 10-087557 have been disclosed. The above two technologies are similar to each other, and are designed to support and protect the expansion joint by installing a metal plate, such as a steel plate or an aluminum plate, at the bottom of the channel above the joint gap and filling it with an asphalt sealant and aggregate mixture.

However, such conventional techniques have poor physical properties of the asphalt sealant itself, which is used as a binder such as crack resistance, elasticity, and adhesion, so that it cannot effectively absorb tensile and compressive forces, so that not only cracks are easily generated by live load, but also pavement surfaces. There was a problem that the adhesive surface between the mixture and the mixture was separated.

In addition, since the steel plate installed on the upper part of the joint gap is simply mounted without a separate fixing structure, the center of the steel plate is moved by repeated impacts from the vehicle, and this causes the joint to crack and damage or in severe cases, There was a problem with frequent serious problems.

United States Patent No. 4,324,504 United States Patent No. 5,024,554 Korean Patent Registration No. 10-087557

The present invention was invented to solve the above-described problems in the related art, and the crack resistance and adhesion performance of the binder and aggregate mixture filled in the channel above the joint gap are greatly increased, and plastic deformation resistance is improved, thereby increasing tensile and compressive force. In addition to being able to absorb effectively, the separation between the pavement and the mixture can be suppressed as much as possible, and plastic deformation caused by vehicle load can be minimized, thereby improving the durability and stability of the joint. It has its purpose in providing.

The expansion joint for a road structure according to the present invention for achieving such an object comprises: a joint gap formed between adjacent slabs of the road structure; A channel formed by cutting the pavement layer above the joint gap to a predetermined width; A backup agent made of an elastic material having a predetermined elasticity and inserted into the joint gap; A binder plug filled in the joint gap above the backup agent; A support plate installed at the bottom of the channel to shield the upper part of the joint gap and having a width smaller than that of the channel; A primer applied to the inner surface of the channel including the support plate to a predetermined thickness; An elastic mixture filled in the channel to which the primer is applied; And a finish coating layer applied to the upper surface of the elastic mixture;

The elastic mixture is composed of 70 to 97% by weight of Indonesian natural asphalt and 3 to 30% by weight of the modifier composition, but the modifier composition is 10 to 200% by weight of ethylene-vinyl-acetate polymer based on 100 parts by weight of styrene-butadiene-styrene block copolymer It is characterized by consisting of a high-elastic binder consisting of 10 to 50 parts by weight of petroleum resin and 10 to 100 parts by weight of a viscosity modifier, and a first-grade single-grain aggregate made of any one of basalt, sandstone, porphyry and granite.

According to such a preferred feature of the present invention, the elastic mixture is mixed in a ratio of 50 kg of high elastic binder and 170 kg of single grain aggregate per 1 m 2 of laying area based on a laying thickness of 10 cm.

According to another preferred feature of the present invention, as the primer, a highly elastic binder constituting the elastic mixture is used, and an amount of about 2.5 kg per 1 m 2 of applied area is applied in an amount of 2 mm or more.

According to another preferred feature of the present invention, it may further include a fixing pin for fixing the position of the support plate.

In addition, a method of constructing a new joint for a road structure according to the present invention for achieving the above object comprises: forming a channel having a predetermined width by cutting a pavement layer above the joint gap formed between neighboring slabs; Removing and drying foreign substances such as dust existing inside the channel; Inserting a backup agent having a predetermined elasticity in the joint gap; Filling a high-elastic binder plug having excellent waterproofness in the joint gap above the backup agent; Installing a support plate on the bottom of the channel above the joint gap; Applying a primer to the inner surface of the channel including the support plate to a predetermined thickness; It consists of 70 to 97% by weight of natural asphalt and 3 to 30% by weight of the modifier composition, but the modifier composition is 10 to 200 parts by weight of an ethylene-vinyl-acetate polymer and a petroleum resin based on 100 parts by weight of the styrene-butadiene-styrene block copolymer. A highly elastic binder consisting of 10 to 50 parts by weight and 10 to 100 parts by weight of a viscosity modifier, and a grade 1 single-grained aggregate composed of any one of basalt, sandstone, porphyry, and granite are heated to 170 to 190°C using an indirect heating type stirrer. Laying the elastic mixture in the primer-coated channel; Compacting the elastic mixture laid in the channel with a compactor to harden it; And after the surface temperature of the compacted elastic mixture is cooled to 100 ~ 150 ℃, performing a finish coating on the surface of the elastic mixture; characterized in that it comprises a.

According to the new joint for road structures and its construction method according to the present invention, the binder constituting the elastic mixture adopts Indonesian natural asphalt as the main raw material, and the SBS polymer modifier is adopted to secure sufficient stiffness, thereby providing excellent shape retention as well as petroleum resin. As the adhesive strength is very excellent, the crack resistance and adhesion performance of the elastic mixture itself mixed with the single-grained aggregate is greatly increased, and plastic deformation resistance due to the vehicle load is greatly improved by the engagement of the first-grade single-grained aggregate. .

As a result, it is possible to effectively absorb the tensile and compressive forces generated in the joint, as well as to suppress separation between the existing pavement and the elastic mixture as much as possible, and to minimize plastic deformation due to vehicle load, remarkably improving the durability and stability of the joint. You can improve.

In addition, since the support plate is stably fixed to the installation position above the joint gap, it can be stably supported without being moved by the load of the traveling vehicle.

Therefore, the present invention has a great effect on improving the workability, safety, durability, and cost reduction of a road structure expansion joint.

1 is a cross-sectional view showing an expansion joint for a road structure according to the present invention,
2 is a block diagram showing a method of constructing a new joint for a road structure according to the present invention,
3 is a cross-sectional view showing another embodiment of an expansion joint for a road structure according to the present invention.

Specific features and other advantages of the expansion joint for a road structure and its construction method according to the present invention will become more apparent from the description of the following preferred embodiments with reference to the accompanying drawings.

In FIG. 1, the expansion joint 10 for a road structure according to the present invention is formed between two adjacent concrete slabs (1: hereinafter abbreviated as "slab") in a road structure such as a bridge or an underpass. It is installed in the joint gap 11 that allows the expansion and contraction.

The expansion joint 10 is basically a channel 12 with a predetermined width in the asphalt concrete pavement layer (2: hereinafter abbreviated as "paving layer") on the upper part of the joint gap 11 formed at regular intervals between the slabs 1. ) Is formed, and the elastic compound 17 is filled in the channel 12 to allow the road to be stretched and contracted to ensure smooth running of the vehicle.

Like the joint gap 11, the channel 12 is formed in the width direction of the road and has a wider width than the joint gap 11.

A backup agent 13 is inserted into the joint gap 11 to prevent foreign matter or rainwater from penetrating. To this end, the backup agent 13 must always be in close contact with the slab 1 when the slab 1 expands and contracts, so it is composed of an elastic material having high elasticity and heat resistance.

In addition, a binder plug 14 having a predetermined elasticity and adhesive force is filled in the joint gap 11 on the upper part of the backup agent 12 so that the elastic joint 10 can build more reliable watertight performance. The binder plug 14 may be any binder having appropriate elasticity and adhesive strength, but preferably, a high elastic binder having excellent waterproof capability constituting the elastic mixture 17 of the present invention may be used as described later.

A support plate 15 made of steel or aluminum covering the joint gap 11 is installed at the bottom of the channel 12 above the joint gap 11 filled with the binder plug 14. The support plate 15 effectively supports the load of the vehicle and prevents damage such as the elastic mixture 17 filled in the channel 12 being depressed into the joint gap 11 by the vehicle load. This support plate 15 has a width smaller than the width of the channel 12 in consideration of the stretch of the road.

And on the entire inner surface of the channel 12 including the support plate 15, a primer 16, which is a kind of adhesive, is applied so that the elastic mixture 17 filled therein can be firmly attached to the slab 1 and the pavement layer 2 It is evenly applied to a predetermined thickness. Preferably, an amount of about 2.5 kg per 1 m 2 of coating area may be uniformly applied to 2 mm or more.

Various kinds of such primers 16 may be used, and a high elastic binder constituting the elastic mixture 17 described below is preferably used for a more stable and solid adhesion.

At this time, it may be more preferable that the primer 16 is applied to the bottom surface of the channel 12 on which the support plate 15 is mounted so that the flow of the support plate 15 can be prevented and fixed reliably. In this case, a backup agent (13) When filling the binder plug 14 in the upper joint gap 11, it may be applied to the bottom of the channel 12 together.

The elastic mixture 17 is made of a mixture of a high elastic binder and a first grade single particle size aggregate. The binder is composed of 3 to 30 parts by weight of the modifier composition in 70 to 97 parts by weight of natural asphalt in Indonesia according to the features of the present invention. And the modifier composition is composed of 10 to 200 parts by weight of an ethylene-vinyl-acetate polymer, 10 to 50 parts by weight of a petroleum resin, and 10 to 100 parts by weight of a viscosity modifier based on 100 parts by weight of the styrene-butadiene-styrene block copolymer.

Indonesia's natural asphalt has a very high modulus of elasticity at high temperatures, so even if a small amount of additional additives are added to strengthen the stiffness, the elastic resilience is improved. Together, excellent rigidity can be secured.

Styrene-butadiene-styrene (SBS) block copolymer functions to maintain the shape and improve adhesion of the elastic mixture 17 after construction, and has a remarkable effect of improving high temperature properties such as asphalt softening point, so it has excellent solubility as well as elastic resilience. good.

Ethylene-vinyl-acetate polymer greatly improves the adhesive strength of the binder, and petroleum resin not only improves the adhesive strength by lowering the excessive viscosity of the binder while increasing the high-temperature physical properties while imparting adhesive performance, but also cracks at low temperatures below 20℃. It prevents over brittle fracture.

These petroleum resins contain 10 to 50 parts by weight. When the amount of petroleum resin is less than 10 parts by weight, the adhesive strength decreases, and accordingly, the crack resistance and adhesion performance of the elastic mixture itself mixed with the single-grained aggregate decreases.

When the petroleum resin exceeds 50 parts by weight, the adhesive strength is not greatly improved, and thus the crack resistance and adhesive performance of the elastic mixture itself mixed with the single-grained aggregate are not significantly increased, while the manufacturing cost is increased. Therefore, the petroleum resin is most preferably mixed about 10 to 50 parts by weight.

As the viscosity modifier, oils such as animal and vegetable oils may be used, and while heating the binder composition, viscosity decreases to improve workability while preventing a rapid decrease in viscosity change at high temperatures. In addition, it is good that the shape-holding power is maintained and does not flow even after construction.

And the single-grained aggregate may be made of any one of basalt, sandstone, porphyry, and granite, and is preferably composed of a clavicle stone having a particle size of 14 to 20 mm.

The elastic mixture 17 of the present invention is preferably heated to about 170-190°C by an indirect heating type stirrer and then installed in the channel 12, where the installation area is 1㎡ based on the installation thickness of 10cm. It is preferable to lay it down at a rate of 50 kg per binder and 170 kg for single grain aggregate.

On the other hand, on the surface of the elastic mixture 17 installed and compacted in the channel 12, the finishing coating layer 18 for enhancing the waterproof ability while improving the adhesion with the pavement layer 2 may partially invade the pavement layer 2. Is formed.

Therefore, the expansion joint 10 of the present invention can effectively absorb the tensile and compressive forces in the expansion joint 10 as the crack resistance and adhesive performance of the elastic mixture 17 are significantly increased, and plastic deformation resistance is improved. , The separation between the pavement layer (2) and the elastic mixture (17) can be suppressed as much as possible, and plastic deformation due to vehicle load is also minimized by the meshing of the solidly attached single-grained aggregate, thereby increasing the durability and stability of the joint)10). It can be greatly improved.

Next, a method of constructing an expansion joint 10 for a road structure according to the present invention having such structural characteristics will be described in parallel with FIG. 3.

In step 100, the pavement layer 2 is cut at regular intervals using a load cut, and the cut pavement layer 2 is destroyed with a small breaker or a water hammer. And by removing the broken pavement layer 2, a channel 12 having a predetermined width is formed on the joint gap 11 between the slabs 1.

Next, in step 110, in order to exhibit sufficient adhesion and prevent peeling, the latency, dust, oil, etc. in the channel 12 are cleanly removed using a shot blast, a blower, or a water cleaning machine, and then a torch Dry thoroughly using a etc.

Thereafter, in step 120, a high elastic backup agent 13 having heat resistance is inserted into the joint gap 11 between the slabs 1, and in step 130, the joint gap on the upper side of the backup agent 13 The binder plug 14 is filled in (11) using an injector (not shown).

The binder plug 14 may preferably be formed by filling a highly elastic binder constituting the elastic mixture 17 installed in the channel 12, and in this case, not only has excellent crack resistance and adhesion, but also excellent waterproof ability. Therefore, it is better to improve the durability and stability of the joint 10.

Next, in step 140, the support plate 15 is placed on the bottom of the channel 12 above the joint gap 11 filled with the binder plug 14, and in step 150, the channel including the support plate 15 The primer 16, which is an adhesive, is applied to the entire inner surface of (12) in a predetermined thickness.

Like the binder plug 14, the primer 16 is preferably a highly elastic binder constituting the elastic mixture 17, and it is preferable to uniformly apply an amount of about 2.5 kg per 1 ㎡ to 2 mm or more. desirable.

At this time, for more stable fixation of the support plate 15, it is preferable that the primer 16 is applied to the bottom of the channel 12 on which the support plate 15 is placed. In this case, the above-described Biden plug 14 filling step ( 140) can be applied at the same time.

Next, in step 160, an ethylene-vinyl-acetate polymer 10 to 200 parts by weight and petroleum based on 70 to 97 parts by weight of Indonesian natural asphalt and 100 parts by weight of styrene-butadiene-styrene block copolymer in an indirect heating method stirrer. A binder composition consisting of 3 to 30 parts by weight of a modifier composition consisting of 10 to 50 parts by weight of a resin and 10 to 100 parts by weight of a viscosity modifier and a first grade single-grain aggregate having a particle size of 14 to 20 mm are added to a predetermined temperature, preferably 170 to 190°C. The elastic mixture 17 obtained by evenly mixing the binder and the single particle aggregate by heating to melt the binder composition is placed in the channel 12 to which the primer 16 is applied.

At this time, the elastic mixture 17 to be laid is laid at a rate of 50 kg of binder and 170 kg of single grain aggregate per 1 m 2 of laying area based on the laying thickness of 10 cm.

Next, in step 170, the elastic mixture 17 laid in the channel 12 is firmly compacted using, for example, a tantem roller or the like.

Here, it may be preferable that the elastic mixture laying step 160 and the compaction step 170 are repeatedly performed several times with an appropriate thickness rather than proceeding with a single operation.

Next, in step 180, apply a finishing coating to include a part of the surface of the elastic mixture 17 and the packaging layer 2 while the surface temperature of the compacted elastic mixture 17 is sufficiently cooled to approximately 100 to 150°C. Thus, the installation of the expansion joint 10 is completed by forming the finishing coating layer 18.

On the other hand, Figure 2 shows another embodiment of the expansion joint 10 for a road structure according to the present invention, this embodiment has the same configuration except for some of the configuration of the above-described embodiment, for convenience The same reference numerals will be used and duplicate explanations will be omitted.

This embodiment further includes a fixing pin 19 capable of reliably fixing the support plate 15 to the bottom of the channel 12 above the joint gap 11 without flow, in the configuration of the above-described embodiment.

Accordingly, the support plate 15 can be fixed in a more reliably and stably position by the fixing pin 19 together with the primer 16, so that the construction is easy, and even after construction, the flow due to the vehicle load is reliably prevented, so that the elastic mixture (17) cracking or damage can be suppressed as much as possible.

Meanwhile, the support plate 15 may be made of a metal material, and a corrosion-resistant coating layer may be applied to the surface of the support plate 15 to prevent corrosion of the metal surface. The coating material of this anticorrosion coating layer is metcaptotriazole 20% by weight, petroleum sulfonate 15% by weight, mercaptobenzothiazole 10% by weight, hafnium 15% by weight, molybdenum emulsified (MoS2) 10% by weight, oxidation It is composed of 30% by weight of aluminum, and the coating thickness can be formed to 8㎛.

Metcaptotriazole, petroleum sulfonate and mercaptobenzothiazole play a role in preventing corrosion and discoloration.

Hafnium is a transition metal element with corrosion resistance and plays a role in having excellent waterproof and corrosion resistance.

Molybdenum emulsified plays a role of imparting wetness and lubricity to the surface of the coating film.

Aluminum oxide is added for the purpose of fire resistance and chemical stability.

The reason why the ratio of the constituent components and the coating thickness were numerically limited as described above, as a result of the inventor's analysis through the test results several times, showed the optimum anti-corrosion effect at the ratio.

In addition, a contamination prevention coating layer made of a contamination prevention coating composition may be applied around the support plate 15 so as to effectively prevent adhesion and removal of contaminants.

The composition for antifouling coating contains alkylate polyglucoside and aminoalkyl slovetaine in a molar ratio of 1:0.01 to 1:2, and the total content of alkylate polyglucoside and aminoalkyl slovetaine is 1 to 10 with respect to the total aqueous solution. % By weight.

The alkylate polyglucoside and aminoalkyl slovetaine are preferably 1:0.01 to 1:2 as a molar ratio.If the molar ratio is out of the above range, the coating property of the substrate decreases or the surface moisture adsorption increases after application, thereby removing the coating film. There is a problem.

The alkylate polyglucoside and aminoalkyl slovetaine are preferably 1 to 10% by weight in the total composition aqueous solution, and if it is less than 1% by weight, there is a problem that the coating property of the substrate is deteriorated, and if it exceeds 10% by weight, the coating film thickness is increased. It is easy to cause crystal precipitation due to.

On the other hand, as a method of applying the present antifouling coating composition around the support plate 15, it is preferable to apply it by a spray method. In addition, the final coating film thickness around the support plate 15 is preferably 500 to 2000 Å, more preferably 1000 to 2000 Å. If the thickness of the coating film is less than 500 Å, there is a problem of deterioration in the case of high temperature heat treatment, and if it exceeds 2000 Å, there is a disadvantage that crystal precipitation on the coated surface is likely to occur.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mol of alkylate polyglucoside and 0.05 mol of aminoalkyl slovetain to 1000 ml of distilled water, followed by stirring.

In addition, the channel 12 may be coated with a fragrance material mixed with functional oil, thereby sterilizing the channel 12, and has an effect of reducing the stress of the operator during transport and construction of the channel 12.

Functional oil may be mixed with the perfume material, and the mixing ratio is 95 to 97% by weight of the perfume material and 3 to 5% by weight of the functional oil are mixed, and the functional oil is Acacia dealbata oil 50 It consists of 50% by weight of balleriana fauriei oil by weight.

Here, the functional oil is preferably mixed in 3 to 5% by weight based on the fragrance material. If the blending ratio of the functional oil is less than 3% by weight, the effect is insignificant, and if the blending ratio of the functional oil exceeds 3 to 5% by weight, the function is not greatly improved, while the manufacturing cost is greatly increased.

The main chemical constituents of Acacia dealbata oil are palmic aldehyde, enanthic acid, etc. It has a good scent and has good sterilization, anti-depressant action, and stress relief.

Valeriana fauriei oil is mainly composed of bornyl acetate, pinene, etc., and has an excellent effect on relieving anxiety and tension because it calms and calms the mind along with lowering blood pressure.

Since such functional oil is coated on the channel 12, not only can the channel 12 be sterilized, but also helps to recover from fatigue of the operator during transportation and construction of the channel 12.

In addition, the elasticity enhancer may be further mixed with the high elastic binder, and 10 parts by weight of the elasticity enhancer are mixed with 90 parts by weight of the high elasticity binder.

The elasticity enhancing agent mixed with 10 parts by weight of the highly elastic binder is made by mixing rubber, carbon black, antioxidant, and sulfur, and the mixing ratio thereof is 60% by weight of rubber, 33 to 36% by weight of carbon black, and antioxidant 2 ~5% by weight and 1 to 3% by weight of sulfur as an accelerator are mixed.

Carbon black is to increase abrasion resistance, so it is added, but if the content is less than 33% by weight, elasticity and abrasion resistance decrease, and if it exceeds 36% by weight, the content of rubber, which is the main component, is relatively small, so the elasticity may decrease. , 33 to 36% by weight are mixed.

Antioxidant is 3C (N-PHENYL-N'-ISOPROPYL- P-PHENYLENEDIAMINE) or RD (POLYMERIZED 2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE) to add 2 to 5% by weight, 2 If it is less than% by weight, the product is liable to be oxidized, and if too much is added and exceeds 5% by weight, the content of rubber, which is the main component, is relatively small, and there is a fear that the elasticity may decrease, and the price of the antioxidant is expensive. ~5% by weight is appropriate.

Sulfur, which is an accelerator, is mixed with 1 to 3% by weight. If less than 1% by weight, the vulcanization effect in the heating process during molding is insignificant, so 1% by weight or more is added. If it exceeds 3% by weight, since the content of the rubber as the main component is relatively small, the elasticity may be lowered, so 1 to 3% by weight is appropriate.

Accordingly, in the present invention, since the elasticity enhancer having elasticity in various directions is further mixed with the high elastic binder, the elasticity, toughness, and stiffness are increased, thereby improving durability, thereby improving the performance of the elastic joint.

1: slab 2: paving layer
10: expansion joint 11: joint gap
12: channel 13: backup agent
14: binder plug 15; Support plate
16: primer 17: elastic mixture
18: finishing coating layer 19: fixing pin

Claims (4)

A joint gap formed between adjacent slabs of the road structure;
A channel formed by cutting the pavement layer above the joint gap to a predetermined width;
A backup agent made of an elastic material having a predetermined elasticity and inserted into the joint gap;
A binder plug filled in the joint gap above the backup agent;
A support plate installed at the bottom of the channel to shield the upper joint gap and having a width smaller than that of the channel;
A primer applied to the inner surface of the channel including the support plate to a predetermined thickness;
An elastic mixture filled in the channel to which the primer is applied; And
Including; a finish coating layer applied to the upper surface of the elastic mixture,
The elastic mixture is composed of 70 to 97% by weight of Indonesian natural asphalt and 3 to 30% by weight of the modifier composition, the modifier composition is ethylene-vinyl-acetate polymer 10 to 100 parts by weight of styrene-butadiene-styrene block copolymer 200 parts by weight, 10 to 50 parts by weight of petroleum resin, and 10 to 100 parts by weight of a viscosity modifier, and a single-grain aggregate composed of any one of basalt, sandstone, porphyry and granite;
The elastic mixture is mixed in a ratio of 50 kg of binder and 170 kg of single grain aggregate per 1 m 2 of laying area, based on a laying thickness of 10 cm;
As the primer, a binder constituting the elastic mixture is used, and an amount of about 2.5 kg per 1 m 2 of applied area is applied in an amount of 2 mm or more;
Further comprising a fixing pin for fixing the position of the support plate;
The support plate is made of a metal material, and a corrosion protection coating layer is applied to the surface of the support plate of the metal material, and the coating material of the corrosion protection coating layer is metcaptotriazole 20% by weight, petroleum sulfonate 15% by weight, mercapto Benzothiazole 10% by weight, hafnium 15% by weight, molybdenum emulsified (MoS2) 10% by weight, aluminum oxide 30% by weight, the coating thickness is formed to 8㎛;
The channel is coated with a perfume material mixed with a functional oil, and the mixing ratio of the perfume material and the functional oil is 95 to 97% by weight of the perfume material and 3 to 5% by weight of the functional oil are mixed, and the functional oil is , Dealbata acacia oil (Acacia dealbata oil) 50% by weight, balleriana pauriei oil (Valeriana fauriei oil) 50% by weight expansion joint for road structures, characterized in that consisting of.
delete delete In the construction method using the expansion joint for road structures of claim 1,
Forming a channel having a predetermined width by cutting the pavement layer above the joint gap formed between adjacent slabs;
Removing and drying foreign substances present in the channel;
Inserting a backup agent having a predetermined elasticity in the joint gap;
Filling a binder plug having excellent waterproofness in the joint gap above the backup agent;
Installing a support plate on the bottom of the channel above the joint gap;
Applying a primer to an inner surface of the channel including the support plate to a predetermined thickness;
Consisting of 70 to 97% by weight of Indonesian natural asphalt and 3 to 30% by weight of the modifier composition, the modifier composition is ethylene-vinyl-acetate polymer 10 to 200 parts by weight and petroleum based on 100 parts by weight of styrene-butadiene-styrene block copolymer An elastic mixture obtained by heating a binder consisting of 10 to 50 parts by weight of a resin and 10 to 100 parts by weight of a viscosity modifier, and a single-grained aggregate composed of any one of basalt, sandstone, porphyry, and granite to 170 to 190°C using an indirect heating method stirrer. Laying in the channel to which the primer is applied;
Compacting and hardening the elastic mixture laid in the channel with a compactor; And
After the surface temperature of the compacted elastic mixture is cooled to 100 ~ 150 ℃, the step of applying a finish coating on the surface of the elastic mixture; construction method for a road structure expansion joint comprising a.

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