KR-102960955-B1 - High-strength Grid for Road Paving Including Non-Woven Fabric and Road Paving Method using Thereof

Abstract

The present invention relates to a high-strength grid for road paving and a road paving method using the same, comprising: a grid; an asphalt adhesive composition comprising, based on 100 parts by weight of asphalt applied on the grid, 1 to 30 parts by weight of styrene-butadiene-styrene, 1 to 30 parts by weight of petroleum resin, 1 to 10 parts by weight of nanoceramic particles, 1 to 3 parts by weight of vegetable oil, 0.1 to 2 parts by weight of an antioxidant, and 0.1 to 2 parts by weight of an adhesion promoter; and a nonwoven fabric attached and bonded to the grid coated with the asphalt adhesive composition. The high-strength grid for road paving according to the present invention, specifically comprising a non-woven fabric, has the effect of suppressing crack formation and plastic deformation without the application of a primer used in conventional road paving, while simultaneously enhancing structural stability and interlayer adhesion and providing high strength. In particular, the asphalt adhesive composition according to the present invention can secure an adhesion strength of 1.5 N/mm or more with the base layer without the application of a primer, and has a tensile strength of 50 to 100 kN/m, thereby providing an effect of reducing cracks and/or preventing cracks during vehicle driving, and increasing durability.

Inventors

• 이용화

Assignees

• 주식회사 큐맥스

Dates

Publication Date

20260507

Application Date

20250429

Claims (5)

1. grid; An asphalt adhesive composition comprising, based on 100 parts by weight of asphalt applied over the grid, 1 to 30 parts by weight of styrene-butadiene-styrene, 1 to 30 parts by weight of petroleum resin, 1 to 10 parts by weight of nanoceramic particles, 1 to 3 parts by weight of vegetable oil, 0.1 to 2 parts by weight of an antioxidant, and 0.1 to 2 parts by weight of an adhesion promoter, further comprising 0.1 to 5 parts by weight of bauxite powder based on 100 parts by weight of asphalt, further comprising 0.1 to 3 parts by weight of calcium silicate based on 100 parts by weight of asphalt, further comprising 0.1 to 3 parts by weight of hypochlorite based on 100 parts by weight of asphalt, further comprising 0.1 to 3 parts by weight of smectite based on 100 parts by weight of asphalt, further comprising 0.1 to 5 parts by weight of gluconolactone based on 100 parts by weight of asphalt, and dipotassium glycyrrhizate for asphalt Further comprising 0.1 to 5 parts by weight based on 100 parts by weight, further comprising distearyl pentaerythritol diphosphate in 0.1 to 5 parts by weight based on 100 parts by weight of asphalt, further comprising sodium rosinate in 0.1 to 3 parts by weight based on 100 parts by weight of asphalt, further comprising atapulgite in 0.1 to 5 parts by weight based on 100 parts by weight of asphalt, further comprising colemanite in 0.1 to 3 parts by weight based on 100 parts by weight of asphalt, further comprising hexamethyl disilazane in 0.1 to 5 parts by weight based on 100 parts by weight of asphalt, further comprising aragonite in 0.1 to 3 parts by weight based on 100 parts by weight of asphalt, further comprising diethyl maleate in 0.1 to 5 parts by weight based on 100 parts by weight of asphalt, and dioctyl adipate in 0.1 to Asphalt adhesive composition further comprising 5 parts by weight; and A high-strength grid for road paving comprising a non-woven fabric attached and bonded to a grid coated with the above asphalt adhesive composition.
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4. A preparation stage for preparing the surface of a newly constructed or repaired road; A grid laying step for laying a road paving grid after the above sorting step is completed; On the grid where the grid laying step described above has been completed, an asphalt adhesive composition comprising, based on 100 parts by weight of asphalt, 1 to 30 parts by weight of styrene-butadiene-styrene, 1 to 30 parts by weight of petroleum resin, 1 to 10 parts by weight of nanoceramic particles, 1 to 3 parts by weight of vegetable oil, 0.1 to 2 parts by weight of an antioxidant, and 0.1 to 2 parts by weight of an adhesion promoter, further comprising, based on 100 parts by weight of asphalt, 0.1 to 5 parts by weight of bauxite powder, further comprising based on 100 parts by weight of asphalt, 0.1 to 3 parts by weight of calcium silicate, further comprising based on 100 parts by weight of asphalt, further comprising based on 100 parts by weight of hypochlorite, further comprising based on 100 parts by weight of asphalt, further comprising based on 100 parts by weight of smectite, and further comprising based on 100 parts by weight of asphalt, 0.1 to 3 parts by weight of gluconolactone, Further comprising dipotassium glycyrrhizate in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of asphalt, further comprising distearyl pentaerythritol diphosphate in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of asphalt, further comprising sodium rosinate in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of asphalt, further comprising atapulgite in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of asphalt, further comprising colemanite in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of asphalt, further comprising hexamethyl disilazane in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of asphalt, further comprising aragonite in an amount of 0.1 to 3 parts by weight based on 100 parts by weight of asphalt, further comprising diethyl maleate in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of asphalt, and dioctyl adipate for asphalt A step of applying an asphalt adhesive composition, wherein the asphalt adhesive composition is further included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight; A non-woven fabric bonding step of covering a road paving grid coated with the above asphalt adhesive composition with a non-woven fabric and bonding the grid and the non-woven fabric with the adhesive composition; and A road paving method comprising a pouring step of pouring an asphalt composition for road paving or a concrete composition for road paving onto the upper surface of the nonwoven fabric after the above nonwoven fabric bonding step is completed.
5. In paragraph 4, A road paving method comprising a grid having a thickness of 0.5 to 3 mm in the grid laying step.

Description

High-strength Grid for Road Paving Including Non-Woven Fabric and Road Paving Method Using Thereof The present invention relates to a high-strength grid for road paving comprising a nonwoven fabric and a road paving method using the same. More specifically, the invention relates to a high-strength grid for road paving comprising a nonwoven fabric that suppresses crack formation and plastic deformation without the application of a primer used in road paving, enhances structural stability and interlayer adhesion, and provides high strength, while simultaneously providing high strength, and a road paving method using the same. Generally, as asphalt roads age and their strength decreases, severe temperature changes or the application of heavy vehicle loads can cause cracks, ground subsidence, and potholes in the road. If rain, snow, or calcium chloride penetrates these damaged areas, the cracking speed accelerates further, and the damaged area expands. Ultimately, damaged parts of the paved road must be repaired promptly to ensure safe vehicle operation and extend the lifespan of the road. Generally, damaged road sections are cut to a certain thickness and overlaid with an asphalt mixture. However, for rapid repairs, the cutting depth is becoming relatively shallow, and conversely, vehicle loads are increasing rapidly, so high-strength, low-elongation geotextile reinforcements are being used to maintain the design life of the asphalt overlay layer. For this purpose, a new surface layer of the road is installed by applying emulsified asphalt (tack coating) over the surface where the damaged part of the road has been cut, installing a geotextile grid, and then overlaying it with an asphalt mixture. In asphalt overlay work, when the existing road surface is cut with a cutting tool, irregular grooves and wavy patterns of a certain depth are created on the road surface along the depth of the cutting blade, and the emulsified asphalt applied to the uneven surface is mixed with water, so when the water evaporates and hardens, it becomes adhesive as a binder. However, at construction sites, the application amount of emulsified asphalt is inconsistent, and as the curing speed of the emulsified asphalt is delayed depending on the climatic conditions, the adhesion to the uneven cutting surface is significantly reduced; therefore, a geotextile grid is installed on the uneven cutting surface. When overlaying such asphalt mixtures, geotextile grids are mainly used as reinforcing materials. However, if a grid consisting only of a mesh structure in the shape of a grid is used as in the past, heavy equipment vehicles will run over the grid while laying the asphalt overlay layer without sufficient adhesion to the surface of the cut layer. As a result, shear stress is applied to the surface of the grid due to the movement of the wheels of the heavy equipment vehicles, and the grid, which is a structure fixed by a mesh, frequently experiences detachment and wrinkling during the shear stress transmission process, which prevents the reinforcing material from performing its full potential. Typically, a geotextile grid for reinforcing asphalt layers is manufactured by twisting multiple strands of high-strength fibers, such as glass fiber, polyester, polypropylene, aramid, and carbon fiber, into oving, and then producing a mesh structure with a width of typically 1 to 3 m and a length of 50 to 150 m, or by knitting and weaving. The manufactured grid is then treated with a functional coating agent to chemically bond with the asphalt mixture and add viscoelasticity, thereby finally producing a high-performance grid. However, existing grids generate creasing stress that causes the grid to lift or twist due to the movement of heavy equipment wheels weighing about 10 to 30 tons. This means that the fixed structure of the continuous secondary mesh cannot dissipate or relieve the generated wrinkle stress. As a result, the area around the geotextile grid where the load of heavy equipment vehicles is applied tends to detach, and wrinkles often form a wavy pattern. If there are wrinkles in the grid like this, the high-strength elasticity of the geotextile grid cannot be properly transferred to the asphalt layer, and consequently, it does not have a sufficient effect on increasing the serviceability of the road. Furthermore, wrinkles in the grid can have a negative effect on adhesion with the asphalt mixture, potentially causing problems such as microcracks. Meanwhile, Registered Patent No. 2515321 discloses a three-dimensional grid and a road repair construction method using the same, which removes foreign substances from the cut surface of the coated pavement, lays a three-dimensional grid, and then overlays an asphalt mixture. FIG. 1 is an enlarged photograph showing an example of a grid installed to be applied to the present invention. FIG. 2 is a photograph of an actual grid laid and asphalt adhesive composition applied according to the pres