KR20060011142A - Resurfacing or repairing roads or bridges - Google Patents

Abstract

The present invention relates to resurfacing or repairing roads or bridges, and provides a rubber asphalt adhesive layer and an asphalt-impregnated glass fiber nonwoven layer under the asphalt concrete in resurfacing an old asphalt road or concrete bridge with an asphalt concrete mixture (ascon). By improving the adhesive strength of the old and new pavement layer to achieve a single bond of the old and new pavement layer and to improve the durability of the resurfaced road or bridge, the present invention relates to a re-paving method or repair method of the road or bridge economically in the long term.

Road resurfacing, bridge resurfacing, concrete repair

Description

Resurfacing or repairing roads or bridges {Method of resurfacing or repairing construction of roads or bridges}             

1 is a partial cross-sectional view of a road or bridge resurfaced in accordance with the present invention.

The present invention relates to resurfacing or repairing roads or bridges, and more particularly, to the asphalt asphalt adhesive layer and asphalt impregnation under the asphalt concrete when resurfacing old asphalt concrete (asphalt concrete mixture) or concrete roads and bridges. By providing a glass fiber non-woven fabric layer, it is possible to achieve a single bond by improving the adhesion of old and new pavement layers, and to repackage roads or bridges that can promote long-term economic efficiency by improving durability of resurfaced roads or bridges while suppressing cracking or It is about repair method.

Road and bridge construction should be planned and constructed in the long term as a key industry in the country, and once built, it should have long-lasting durability. The conventional road and bridge pavement method, which was mainly applied in Korea, was to waterproof the asphalt slab and the upper surface of the concrete slab, and to lay the asphalt concrete on it.

Asphalt pavement has the advantages of fast construction, moderate elasticity, and easy repair, and is often used as asphalt concrete by mixing crushed stone, sand, and crushed stone.

However, after a certain period of time, the road surface or bridge may be damaged due to increased traffic, weathering, deterioration, flooding, external shocks, and the like. Maintenance work should be carried out periodically.

In particular, the recent increase in the number of domestic roads and frequent traffic of large vehicles and overload vehicles, the time for repair or repacking is getting shorter.

In addition, since road and bridge pavement is frequently exposed to repeated traffic loads and various environmental conditions, the road and bridge pavement must be flat and waterproof, as well as be integrated with concrete floorboards to be integrated. Less stress from various impacts on the road surface and bridges will prevent cracking and extend road and bridge life.

In the case of repairing such roads and bridges, the waterproofing layer under the asphalt and / or concrete layer in the prior art may be damaged and the waterproofing function of the roads and bridges may be lost. It was then proceeded to repackage the asphalt concrete layer as a waterproof layer and an upper layer.

However, this method was not efficient in terms of securing working time and workability by removing and repacking the surface upper layer and the waterproof layer below it, and thus, the road and bridge maintenance costs were excessively consumed, resulting in economic problems.

Therefore, since then, only a part of the depth of the upper layer has been cut and then repacked with ascone using emulsion asphalt, but in this case, the resurfaced ascon layer and the old paving layer and Due to the lack of adhesive force, the upper asphalt concrete layer was separated from the old paving layer or cracked. Therefore, resurfacing was required once a year or up to three years. Therefore, this also was not preferable in terms of securing the working time and stability and economics of maintenance.

Known in Korea as a concrete floor slab bridge pavement method, there is a patent 431904 (registered on May 6, 2004) of Sublimation & Concrete Co., Ltd. "Latex mixed concrete latex mixed concrete construction method (LMC method)" for concrete floor slab bridge paving. This improves the shortcomings of the conventional asphalt concrete bridge paving method, bridge construction method using latex mixed modified concrete composition which ensures durability and flatness, excellent waterproofness, resistance to cracking and integration with bottom plate concrete The method includes: cutting and cleaning a bridge slab concrete surface to a depth of 2-3 mm and roughening and cleaning the surface while forming irregularities; Covering and spraying the bridge slab concrete with a wet holding cloth for at least 24 hours to maintain the wet state; Concrete roller Faber rail installation step; Spraying with high pressure water to maintain the surface dry saturated condition covering the vinyl at least 12 hours after the cleaning of the bridge; Field production of latex mixture modified concrete with mobile mixer; A brimming step of brushing a small amount of latex mixed modified concrete with a deck brush to apply a thin mortar to the bridge to keep it dry; Laying and mixing latex mixed concrete; Forming a groove with a groove depth of about 5 mm and a groove spacing of about 4 cm to prevent water film formation and to finish the rough surface by using an inclined type tinning machine for cross-linking; Curing agent spraying step; Covering the water soaked with cure; And it is wet curing for 48-72 hours by laying a vinyl on the curing cloth, the curing step consists of a curing step for more than 7 days after curing the curing cloth.

However, the method has excellent durability and waterproof effect of the pavement packaging, the initial cost is high, the construction period takes at least 10 days or more, and the work process is complicated, it is not economical in terms of time, cost, workability.

Therefore, the present inventors overcome the problems of the prior art as described above, and as a result of repeated studies to improve the method of repaving or repairing roads and bridges made of old or damaged asphalt concrete or concrete, the new and old pavement layer By improving the adhesive force of the bottom plate and the new pavement layer of the integrated behavior of the cracking is suppressed while the waterproof and workability, the road and the bridge resurfacing or repair method is completed the present invention.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of resurfacing or repairing roads or bridges that can prevent cracking and improve durability by promoting the integral bonding of the old pavement layer and the new pavement layer by improving the adhesion of the old and new pavement layers. .

Another object of the present invention is to significantly improve the durability due to the increase in the bonding force between the layer raised and the newly paved layer during the repaving work of roads or bridges, and has a significantly longer life than the conventional repaving cycle up to 3 years It is to provide repaving or repairing of roads or bridges that can be economic in the long run.

Re-paving or repairing the road or bridge of the present invention for achieving the above object, after removing the old concrete or asphalt pavement or bridge by a certain thickness and cleaning the surface, asphalt 65-75% by weight, thermoplastic synthetic A rubber asphalt adhesive layer consisting of 5-15% by weight of rubber, 0.5-10% by weight of additives, and 9.5-20% by weight of filler is applied, and asphalt-impregnated glass fiber nonwoven is applied thereon, followed by ascon at 130-170 ° C. It is comprised by laying and hardening.

The composition ratio of the components of the rubber asphalt adhesive layer may vary slightly depending on the winter season and summer season, but generally follows the composition ratio.

The rubber asphalt adhesive layer is applied to a thickness of 0.2-3.0mm.

The asphalt impregnated glass fiber nonwoven fabric is impregnated with asphalt to a nonwoven fabric made of inorganic fibers such as glass fiber as a main raw material, and has no stretch and no seam cracking, thus having excellent dimensional stability, excellent flexibility, no thermal deformation, and tensile strength. And excellent resistance to tearing, durability. Glass fiber nonwovens also serve to protect the adhesive layer from the equipment used for ascon laying. The asphalt impregnated glass fiber nonwoven layer preferably has a thickness of 0.2-1.5mm. If the nonwoven layer is too thick, the top ascon layer and the sliding may occur.

In this way, the glass fiber nonwoven fabric impregnated with asphalt is provided between the lower rubber asphalt adhesive layer and the upper asphalt concrete layer by impregnating asphalt on the nonwoven fabric while using the excellent properties as described above of the glass fiber nonwoven fabric. To improve the adhesion between the rubber asphalt adhesive layer and the asphalt concrete layer, and ultimately to prevent the repaired layer from being separated from the old paving layer or cracking and easily breaking of the repaired new paving layer as in the prior art. It is.

In actual application of the resurfacing or repairing process according to the present invention, the rubber asphalt adhesive layer of the lower part, the asphalt impregnated glass fiber nonwoven fabric, and the ascon layer thereon are applied at the same time in the field, which is applied when the upper asphalt is applied. The heat of 130-170 ° C. allows the glass fiber nonwoven layer and the rubber asphalt adhesive layer at the bottom to be more integrally bonded.

That is, the important thing in road resurfacing or repair work may be the bonding force or the adhesive force of the old paving layer and the newly applied repaving layer which are partially removed due to aging or damage. The rubber asphalt adhesive layer and the asphalt-impregnated glass fiber nonwoven fabric layer are provided between the asphalt concrete layers to facilitate the integral bonding of the old and new pavement layers to improve the adhesive strength.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings, and the scope of the present invention is not limited to these embodiments.

1 is a partial cross-sectional view of a road constructed in accordance with the repackaging or repair method of the present invention.

Referring to the re-paving or repair method of the road or bridge according to the present invention with reference to Figure 1, after the method of the present invention to remove the old concrete or asphalt concrete pavement or bridge (4) by a predetermined thickness and clean up the surface, A rubber asphalt adhesive layer (1) composed of 65-75% by weight of asphalt, 5-15% by weight of thermoplastic synthetic rubber, 0.5-10% by weight of additives and 9.5-20% by weight of a filler is applied to a thickness of 0.2-3.0 mm, and The asphalt impregnated glass fiber nonwoven fabric 2 is then attached, followed by laying and curing the ascon 3 at 130-170 ° C.

Example 1

The old asphalt concrete pavement (4) was cut about 4cm and the asphalt fragments and foreign substances were removed to clean up the surface.

Then, a rubber asphalt adhesive (1) obtained by indirectly heating the composition consisting of 70.6% by weight of asphalt, 11.4% by weight of thermoplastic synthetic rubber, 17.0% by weight of filler and 1.0% by weight of additives to 160-180 ° C. was applied to a thickness of about 1 mm, Separately, about 0.5 mm thick asphalt-impregnated glass fiber nonwoven fabric (2) prepared by impregnating the glass fiber nonwoven fabric was attached thereon, and ascon (3) at 150 ° C. was installed and cured.

Ascon (asphalt concrete mixture) is used as a mixture of asphalt, coarse aggregate (gravel), fine aggregate (sand) or filler (filler) at a temperature of 130-170 ℃.

The resurfacing road after the hardening is completed, the rubber asphalt adhesive layer (1), the asphalt impregnated glass fiber nonwoven fabric layer (2) and the asphalt concrete layer (3) are integrally bonded, the bonding effect is good, integral bonding between the layer structure and glass fiber Due to the excellent durability, dimensional stability, and tensile strength of the nonwoven fabric, the durability of the repaved road is significantly improved compared to the repaved road according to the conventional ascon resurfacing method.

Example 2

The old asphalt concrete (4) was cut about 4cm and the surface was cleaned by removing asphalt fragments or foreign substances.

A rubber asphalt adhesive (1) obtained by indirect heating at 160-180 ° C. of a composition consisting of 69.9% by weight of asphalt, 7.9% by weight of thermoplastic synthetic rubber, 17.5% by weight of filler, and 4.7% by weight of additives was applied to a thickness of about 1 mm, and separately About 0.5 mm thick asphalt impregnated glass fiber nonwoven fabric prepared by impregnating the fibrous nonwoven fabric was attached thereon, and then cured by laying ascon 3 at 160 ° C.

After the curing is completed, the resurfacing cross-linking is good because the rubber asphalt adhesive layer (1), asphalt-impregnated glass fiber nonwoven fabric layer (2) and ascon (3) are integrally bonded, and the bonding effect is good, and the durability and dimensional stability of the glass fiber nonwoven fabric are excellent. However, the durability of the resurfaced bridge due to tensile strength is significantly improved compared to the bridge according to the conventional resurfacing method.

Example 3

The old concrete road (4) was cut about 5cm and the surface was cleaned up by removing concrete fragments or debris.

A rubber asphalt adhesive (1) obtained by indirect heating at 160-180 ° C. of a composition composed of 71.5% by weight of asphalt, 9.1% by weight of thermoplastic synthetic rubber, 17.5% by weight of filler, and 1.9% by weight of other additives was applied to a thickness of about 1 mm. About 0.5 mm thick asphalt impregnated glass fiber nonwoven fabric prepared by impregnating the glass fiber nonwoven fabric was attached thereon, and ascon (3) at 140 ° C. was installed and cured.

After completion of the curing, the repair road is a rubber asphalt adhesive layer (1), asphalt-impregnated glass fiber nonwoven fabric layer (2) and ascon (3) is integrally bonded, the bonding effect is good, excellent durability and dimensional stability of the glass fiber nonwoven fabric, Due to the tensile strength, the durability against the impact on the road is greatly improved.

Example 4

The old concrete bridge (4) was cut about 5cm and the surface was cleaned up by removing concrete fragments or foreign substances.

A rubber asphalt adhesive (1) obtained by indirect heating at 160-180 ° C. of a composition composed of 71.5% by weight of asphalt, 9.1% by weight of thermoplastic synthetic rubber, 17.5% by weight of filler, and 1.9% by weight of other additives was applied to a thickness of about 1 mm. About 0.5 mm thick asphalt impregnated glass fiber nonwoven fabric prepared by impregnating the glass fiber nonwoven fabric was attached thereon, and ascon (3) at 140 ° C. was installed and cured.

After the curing is completed, the resurfacing cross-section is good because the rubber asphalt adhesive layer (1), asphalt-impregnated glass fiber nonwoven fabric layer (2) and ascon (3) are integrally bonded, and the bonding effect is good, and the durability and dimensions of the glass fiber nonwoven fabric are excellent. Due to stability and tensile strength, the durability against the impact on the bridge is also greatly improved.

As described above, according to the repaving or repairing method of the road or the bridge of the present invention, by integrating the old pavement layer and the new pavement layer by improving the adhesive strength of the old and new pavement layers, it is possible to suppress the occurrence of cracks and improve the durability. It becomes possible.

In addition, according to the present invention, the bonding force between the layer taken up and the newly paved layer is improved during resurfacing of roads or bridges, resulting in a significantly longer lifespan than three years, which is a conventional repaving cycle, resulting in long-term economic efficiency. It becomes possible.

Claims (3)

After the old concrete or asphalt concrete pavement or cross-section is rolled up to a certain thickness and cleaned, the surface is 65-75 wt% asphalt, 5-15 wt% thermoplastic synthetic rubber, 0.5-10 wt% additive and 9.5-20 wt% filler. Resurfacing or repairing the road or bridge consisting of applying a rubber asphalt adhesive layer consisting of, and attaching the asphalt impregnated glass fiber nonwoven fabric thereon, and then laying and curing ascon at 130-170 ℃. The method of claim 1, wherein the rubber asphalt adhesive layer, the asphalt-impregnated glass fiber nonwoven fabric and the ascon layer are applied at the same time in the field at about the same time. The method of claim 1 or 2, wherein the rubber asphalt adhesive layer is applied in a thickness of 0.2-3.0mm, and the asphalt-impregnated glass fiber nonwoven fabric is 0.2-1.5mm thick.

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