KR102625465B1 - Guss asphalt waterproof pavement structure and pavement method installed on top of concrete or steel deck - Google Patents

Abstract

The present invention relates to a goose asphalt waterproof pavement structure and pavement construction method laid on the top of a concrete or steel deck. More specifically, the pavement layer laid on the top of a concrete or steel deck deck is divided into two parts: a goose asphalt pavement layer and a modified asphalt pavement layer. By forming in a layered manner, the porosity can be brought close to zero, which not only significantly improves waterproofness, but also increases the elastic buffering capacity to absorb and suppress reflection cracks that occur at the joints of concrete or steel deck floor plates, as well as modified asphalt. This relates to a goose asphalt waterproof pavement structure and pavement construction method that is installed on top of an improved concrete or steel deck to suppress the occurrence of cracks in the pavement layer.

Description

Guss asphalt waterproof pavement structure and pavement method installed on top of concrete or steel deck}

The present invention relates to a goose asphalt waterproof pavement structure and pavement construction method laid on the top of a concrete or steel deck. More specifically, the pavement layer laid on the top of a concrete or steel deck deck is divided into two parts: a goose asphalt pavement layer and a modified asphalt pavement layer. By forming in a two-layer method, the porosity can be brought close to zero, which not only significantly improves waterproofness, but also increases elastic buffering power to absorb and suppress reflection cracks that occur at the joints of concrete or steel deck floor plates. In addition, it relates to a goose asphalt waterproof pavement structure and pavement construction method that is laid on top of an improved concrete or steel deck to suppress the occurrence of cracks in the modified asphalt pavement layer.

In general, since road construction began, asphalt pavement has been the mainstay of road pavement.

Road paving materials used in such asphalt paving include asphalt binder, which is a mixture of asphalt (AP: Asphalt) and admixture, stone dust, aggregate, filler, or sand, as well as synthetic rubber, SBS (styrene-butadiene-styrene), and SBR (Styrene-Butadiene). Rubber) and bio oil are used to improve the adhesion between aggregates.

However, in the case of asphalt pavement, porosity between aggregates occurs, which is usually within the range of 3-6%, resulting in poor waterproofing, cracks in the pavement layer, weakened adhesion, decreased durability, and wasted time and money due to frequent maintenance. Problems arise.

Meanwhile, in the case of bridges, conventionally, most bridges were constructed with concrete with a slab on top of the piers, but as bridges became longer and longer, slabs were installed to reduce the dead load on the bridge deck and extend the period as much as possible. Instead, construction using steel tops became the mainstay.

Accordingly, when paving is done with asphalt on a steel top instead of a slab, water seeps through the voids formed in the asphalt and corrodes the steel top, and the coefficient of expansion and contraction due to temperature changes is large, so the pavement parts are easily separated or cracks occur, shortening the lifespan. Disadvantages arose.

Guss Asphalt was launched to solve this problem.

Goose asphalt maximizes watertightness and significantly improves adhesion by securing a high degree of fluidity. Not only does it provide excellent waterproofing due to its very small porosity, but it also has fluidity, impermeability, impact resistance, bending deformation resistance, and deformation resistance to load. Because it has excellent features, it is widely used in developed countries such as Germany and Japan, and has also been introduced and commercialized in Korea.

However, because Goose asphalt is relatively more expensive than existing asphalt, it cannot be used for general paving due to the high cost burden and is mainly used for special paving.

Accordingly, technologies for improving goose asphalt are being disclosed to reduce costs. These include reducing the content of goose asphalt and adding fillers, increasing adhesion by applying a primer, or adding more plasticizers, fillers, polymers, etc. That is one example.

As a result, costs can be reduced, but cracks occur due to tensile stress due to expansion and contraction, which has the disadvantage of shortening the maintenance period.

In addition, although smaller than before, voids are generated, which can cause the pavement layer to split due to reflection cracks occurring in the spaced apart portions between the bottoms of the steel decks.

Registered Patent Publication No. 10-1784950 (2017.10.13.), Goose asphalt composition and road paving method using the same Publication of Patent No. 10-2018-0108360 (2018.10.04.), Asphalt primer composition and construction method of asphalt waterproofing sheet using the same Registered Patent Publication No. 10-0377431 (2003.03.26.), Waterproofing method for upper concrete bridge surface using goose-based materials and glass fiber mesh

The present invention was created to solve the problems in the prior art in consideration of the problems in the prior art as described above, and the pavement layer laid on the upper part of the concrete or steel deck is composed of a two-layer (Two-) layer of goose asphalt pavement and a modified asphalt pavement layer. By forming in a layer method, the porosity can be brought close to zero, which not only significantly improves waterproofness, but also increases elastic buffering power to absorb and suppress reflection cracks that occur at the joints of concrete or steel deck floor plates, as well as reforming. The main purpose is to provide a goose asphalt waterproof pavement structure and pavement method that is installed on the top of an improved concrete or steel deck to suppress the occurrence of cracks in the asphalt pavement layer.

The present invention is a means for achieving the above object, and the goose asphalt waterproof pavement structure laid on the top of the concrete or steel deck includes a floor plate (10); A primer layer (20) applied on the top of the bottom plate (10) to perform an adhesive function; It consists of an asphalt pavement layer (30) laid on the primer layer (20), wherein the asphalt pavement layer (30) is sequentially laid with a goose asphalt pavement layer (32) and a modified asphalt pavement layer (34). It provides a goose asphalt waterproof pavement structure that is characterized by having a two-layer structure and is laid on top of concrete or steel deck.

At this time, the primer layer 20 may be formed by applying a primer composition obtained by mixing asphalt and SBS (styrene-butadiene-styrene) at a weight ratio of 1:1.

In addition, the goose asphalt pavement layer 32 is formed by laying a goose asphalt mixture, and the goose asphalt mixture includes 7-12% by weight of goose asphalt binder, 18-24% by weight of stone dust, 7-12% by weight of aggregate, and the remaining sand. It can be composed of:

In addition, the Goose asphalt binder is mixed with 70-80% by weight of petroleum asphalt and 20-30% by weight of TLA (Trinidad Lake Asphalt); The petroleum asphalt uses any one selected from straight asphalt, cutback asphalt, emulsified asphalt, blown asphalt, and modified asphalt; The TLA may contain 30 to 40% by weight of ash, 10 to 12% by weight of asphaltene, 8 to 12% by weight of fixed carbon, 5 to 7% by weight of sulfur, and the remaining carbon disulfide.

Additionally, for 100 parts by weight of the goose afphalt mixture, 5 parts by weight of aluminum hydroxide may be added as a heat stabilizer, and 3.5 parts by weight of pine essential oil may be added to perform the wax function.

In addition, the modified asphalt pavement layer 34 is composed of 100 parts by weight of straight asphalt, 20 parts by weight of LDPE (Low Density Polyethylene), 5 parts by weight of gutta-percha, and Texanol Ester. It can be formed by mixing 10 parts by weight of alcohol and 5 parts by weight of phosphite ester.

In addition, the goose asphalt pavement layer 32 and the modified asphalt pavement layer 34 may each have a thickness of 2.5-4.0 cm.

In addition, a grid-shaped grid may be attached to the upper part of the primer layer 20, and a goose asphalt pavement layer 32 may be laid on the upper part of the grid.

In addition, a grid-shaped grid may be attached to the top of the goose asphalt pavement layer 32, and a modified asphalt pavement layer 34 may be installed on the top of the grid.

Additionally, the grid may be made of glass fiber or polyester fiber having a tensile strength of 50 KN or more and an elongation of 4% or less.

Additionally, non-woven fabric may be attached to one side of the grid.

In addition, the present invention includes a first step of cleaning the upper part of the floor plate 10, which is a concrete or steel plate, and removing foreign substances; A second step of forming a primer layer (20) by applying a primer to the upper part of the concrete or steel deck floor plate (10) from which foreign substances have been removed; A third step of forming a goose asphalt pavement layer (32) by laying the goose asphalt mixture on the upper part where the primer is applied; The fourth step of forming the modified asphalt pavement layer (34) by laying the modified asphalt mixture on the upper part of the goose asphalt pavement layer (32) is performed so that the asphalt pavement layer (30) has a two-layer structure. The primer layer 20 is formed by applying a primer composition mixed with asphalt and SBS (styrene-butadiene-styrene) at a weight ratio of 1:1; The Goose asphalt mixture consists of 7-12% by weight of Goose asphalt binder, 18-24% by weight of stone dust, 7-12% by weight of aggregate, and the remaining sand; The Goose asphalt binder is mixed with 70-80% by weight of petroleum asphalt and 20-30% by weight of TLA (Trinidad Lake Asphalt); The petroleum asphalt uses any one selected from straight asphalt, cutback asphalt, emulsified asphalt, blown asphalt, and modified asphalt; The TLA is installed on top of a concrete or steel plate, characterized in that it contains 30 to 40% by weight of ash, 10 to 12% by weight of asphaltene, 8 to 12% by weight of fixed carbon, 5 to 7% by weight of sulfur, and the remaining carbon disulfide. Goose asphalt waterproof paving method is also provided.

At this time, after the second step and before performing the third step, the step of attaching a grid-shaped grid is further performed, wherein the grid is made of glass fiber or polyester with a tensile strength of 50 KN or more and an elongation of 4% or less. It may be a fiber.

In addition, after the third step and before performing the fourth step, a further step of attaching a grid-shaped grid is performed, wherein the grid is made of glass fiber or polyester with a tensile strength of 50 KN or more and an elongation of 4% or less. It may be a fiber.

Additionally, non-woven fabric may be attached to one side of the grid.

According to the present invention, the following effects can be obtained.

First, the porosity can be brought close to zero by forming the pavement layer on top of the concrete or steel deck in a two-layer system of a goose asphalt pavement layer and a modified asphalt pavement layer.

Second, because the porosity is close to zero, waterproofing can be significantly improved.

Third, it has a high elastic buffering capacity, so it can absorb and eliminate reflection cracks that occur at the joints of concrete or steel deck floor plates.

Fourth, the occurrence of cracks in the modified asphalt pavement layer can be suppressed.

Figure 1 is an exemplary cross-sectional view showing a goose asphalt waterproof pavement structure laid on top of a concrete or steel deck according to the present invention.
Figure 2 is an exemplary flow chart showing a goose asphalt waterproof pavement method for laying on top of concrete or steel deck according to the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in more detail.

Prior to describing the present invention, the following specific structural and functional descriptions are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms. It should not be construed as limited to the embodiments described herein.

First, the goose asphalt waterproof pavement structure laid on top of the concrete or steel deck according to the present invention is formed as a two-layer such as a goose asphalt pavement layer and a modified asphalt pavement layer, thereby significantly improving waterproofing performance and improving the concrete or steel deck. It is characterized by suppressing reflection cracks that occur at the joint of the floor plate.

In addition, the term 'concrete or steel top' used in the present invention refers to a slab formed by pouring concrete to a certain length on a concrete pavement to form a pavement layer; Alternatively, it refers to a bridge with a bridge deck made of concrete and a bridge deck made of steel.

In addition, the goose asphalt waterproof pavement method of laying on top of concrete or steel deck according to the present invention involves cutting and removing the upper part of the existing pavement layer to a certain thickness when maintaining a concrete pavement, and then laying an asphalt pavement layer to carry out repair work or , when paving by laying an asphalt pavement layer on the top of a new bridge deck, or when paving by removing the existing asphalt pavement layer when maintaining an asphalt pavement layer laid on the top of a bridge deck, and then laying a new asphalt pavement layer, etc. Applies.

More specifically, as shown in the example of Figure 1, the goose asphalt waterproof pavement structure laid on the concrete or steel deck according to the present invention includes a floor plate (10) and a primer that is applied on the top of the floor plate (10) to perform an adhesive function. It consists of a layer 20 and an asphalt pavement layer 30 laid on the primer layer 20, wherein the asphalt pavement layer 30 includes a goose asphalt pavement layer 32 and a modified asphalt pavement layer 34. It is characterized by being sequentially laid and having a two-layer structure.

At this time, the floor plate 10 may be a concrete or steel deck exposed after cutting and removing the upper part of the existing concrete pavement layer to a certain thickness, or it may be a new bridge deck, or asphalt laid on the top of the bridge deck. The pavement layer may be a concrete or steel deck that is exposed after the existing asphalt pavement layer is removed for maintenance.

Since the bottom plate 10 shrinks and expands significantly depending on temperature, a sealing material or backing material is inserted into the spaced spaced apart portions between the bottom plate 10 and the bottom plate 10 .

Additionally, the primer layer 20 may be formed by applying a mixture of asphalt and SBS (styrene-butadiene-styrene) to improve adhesion on the top of the floor plate 10.

At this time, asphalt is AP-5 (i.e., asphalt cement and a binder), which refers to a binder corresponding to a penetration degree of 60-80, 25°C, 100g, 0.1mm, and PG 64-22.

In this case, in the expression 'PG 64-22', PG refers to the performance grade of the asphalt binder, the number 64 refers to the 7-day average maximum pavement temperature, and 22 indicates the minimum pavement temperature.

In addition, SBS (styrene-butadiene-styrene) gives asphalt elasticity and improves adhesion by compensating for deformation caused by the asphalt binder.

Here, asphalt and SBS are preferably used as a mixed primer composition at a weight ratio of 1:1.

In addition, in the present invention, based on 100 parts by weight of the primer composition, 5.5 parts by weight of Tridymite, 4.5 parts by weight of Llanite, 8.5 parts by weight of EVA (Ethylene vinyl Acetate), and 3-chloropropyloxylene ( An additional 5 parts by weight of 3-chloropropyl oxirane can be added.

At this time, Tridymite is a material corresponding to CAS number 15468-32-3, which enhances waterproofing, cushioning, and adhesion.

Llanite is made by crushing ore into fine powder. It is a mineral that exists in the natural state of Belite and exhibits the property of suppressing cracks while increasing internal strength due to hydration.

Additionally, EVA (Ethylene vinyl Acetate) is added to increase tearability and adhesion.

In addition, 3-chloropropyl oxirane is a substance corresponding to CAS number 19141-74-3 and is a highly reactive chlorine-based substance. It promotes the reaction and prevents neutralization of cement by preventing the infiltration of carbon dioxide. Extends lifespan.

Meanwhile, the goose asphalt pavement layer 32 constituting the asphalt pavement layer 30 is a layer formed by laying a goose asphalt mixture on top of the primer layer 20.

This goose asphalt mixture is designed to fill the voids formed between aggregates with the goal of zero porosity (0% porosity), for example, petroleum asphalt, Trinidad Lake Asphalt (TLA: Trinidad Lake Asphalt), a type of natural asphalt, or thermoplastic resin. By mixing asphalt mixed with modifiers such as coarse aggregate, sand and filler, it is stirred and mixed at high temperature (200-260℃) in a cooker to obtain workability (liquidity) and stability for inflow construction. says that

More specifically, the goose asphalt mixture consists of 7-12% by weight of goose asphalt binder, 18-24% by weight of stone dust, 7-12% by weight of aggregate, and the remaining sand.

At this time, Goose asphalt binder refers to a mixture of 70-80% by weight of petroleum asphalt and 20-30% by weight of TLA (Trinidad Lake Asphalt).

Here, petroleum asphalt is a residue produced by vacuum distillation of crude oil and is divided into straight asphalt, cutback asphalt, emulsified asphalt, blown asphalt, and modified asphalt. ) can be used.

In addition, TLA (Trinidad Lake Asphalt) is a type of natural asphalt that contributes to high-temperature fluidity, waterproofing due to impermeability, and increased adhesion. This TLA is known to contain 30 to 40% by weight of minerals (ash), 10 to 12% by weight of asphaltene, 8 to 12% by weight of fixed carbon, 5 to 7% by weight of sulfur, and the remainder is carbon disulfide.

In addition, stone dust plays a role as a filler, and coarse aggregate of 13 mm or less is used as aggregate, and fine sand of 4 mm or less is used as sand.

In this case, in the present invention, for 100 parts by weight of the goose afphalt mixture, 5 parts by weight of aluminum hydroxide can be further added as a heat stabilizer and 3.5 parts by weight of pine essential oil to perform a wax function.

In particular, in the present invention, based on 100 parts by weight of the goose afphalt mixture, 2.5 parts by weight of polyvinyl dichloride (PVDC), 5 parts by weight of polymethylalkylsiloxane, and sodium dihydrogen orthophosphate (NaH ₂ PO ₄ ·2H ₂ O) 4.5 parts by weight, and 5.5 parts by weight of polyoxyethylene sorbitan monolaurate can be added.

Here, polyvinyl dichloride (PVDC) is an aqueous polymer dispersant that enhances dispersibility, waterproofness, and adhesion.

In addition, polymethylalkylsiloxane not only has anti-foaming properties, but also replaces some or all of the methyl groups in the dimethyl structure with long-chain alkyl groups, thereby suppressing the occurrence of cracks by increasing surface tension and slipperiness of the surface. Strengthens waterproofness and watertightness.

In addition, sodium dihydrogen orthophosphate (NaH ₂ PO ₄ ·2H ₂ O) strengthens the crack resistance, erosion resistance, and corrosion resistance of the pavement surface.

In addition, polyoxyethylene sorbitan monolaurate is a material corresponding to CAS number 9005-64-5, which increases mixing dispersibility, strengthens bonding with cement, and increases adhesion to suppress cracks. do.

On the other hand, the modified asphalt pavement layer 34 laid on the upper surface of the goose asphalt pavement layer 32 is an asphalt mixture obtained by adding a modifier to straight asphalt and stirring it for the purpose of increasing durability and fluidity resistance. .

Modifiers used at this time include polymer resin, metal catalyst, natural asphalt, and fiber.

In the present invention, for 100 parts by weight of straight asphalt, 20 parts by weight of LDPE (Low Density Polyethylene), 5 parts by weight of gutta-percha, 10 parts by weight of Texanol Ester Alcohol, and phosphite ester. An additional 5 parts by weight can be stirred and used.

In this case, LDPE can maintain flexibility without using plasticizers, is non-toxic, has excellent stain resistance, and has the characteristics of translucency.

Also, gutta-percha is a substance extracted from the latex of the Palaquium oblongifolia tree, which softens when heated and has excellent water resistance.

Additionally, Texanol Ester Alcohol has CAS No. This substance corresponds to 25265-77-4, and its chemical name is 2,2,4-Trimethyl-1,3-pentanediol monoisobutyrate. This Texanol increases insulation, moisture resistance, waterproofing, and water pressure resistance properties.

In addition, phosphite ester enhances erosion resistance and corrosion resistance by increasing the corrosion prevention ability due to chlorine components.

Above all, the asphalt pavement layer 30 according to the present invention is very characteristic in that it has a two-layer structure consisting of a goose asphalt pavement layer 32 and a modified asphalt pavement layer 34.

In addition, it is particularly preferable that the thickness of the above-mentioned goose asphalt pavement layer 32 and the modified asphalt pavement layer 34 are each 2.5-4.0 cm.

In other words, the goose asphalt pavement layer 32 is formed thickly rather than thinly to serve only as a waterproof layer, so that it can function not only as a waterproof layer but also as an asphalt pavement layer.

The goose asphalt pavement layer 32 formed thickly in this way has a porosity close to 0% because the goose asphalt binder, filler, and sand fill the voids existing between the aggregates, thereby significantly improving waterproofing performance and improving the goose asphalt Due to its superior adhesion, the goose asphalt mixture is strongly attached to the floor surface (10), so it has very high followability to deformation according to the temperature of the floor surface (10), which occurs at the connection or crack area of the floor surface (10). It is possible to suppress reflection cracks, which ultimately makes it possible to prevent cracks and cracks in the asphalt pavement layer 30, thereby significantly improving the durability of the asphalt pavement layer 30.

In addition, when a rolling load acts on the concrete pavement and the asphalt pavement layer 30 laid on the upper part of the bridge deck, compressive stress is generated on the lower surface of the pavement layer and tensile stress is generated on the upper surface of the concrete or steel deck deck 10. Reflection cracks occur in areas where cracks occur in the pavement layer or joints formed when concrete or steel deck bottom plates are connected. The present invention features a grid attached to reduce reflection cracks.

The grid used in the present invention is made of high-strength synthetic fibers such as glass fibers or polyester fibers in a grid shape with a tensile strength of 50 KN or more and an elongation of 4% or less, and is used for the concrete or steel top floor plate (10). It has the function of suppressing bending displacement and reflection cracks, and is integrated with the goose asphalt pavement layer (32) when paving with goose asphalt, so the effect of increasing the adhesion of the asphalt pavement layer (30) is very large.

This grid can be attached to the upper part of the primer layer 20 and the goose asphalt pavement layer 32 is laid thereon.

Additionally, the grid may be attached to the top of the goose asphalt pavement layer 32 and the modified asphalt pavement layer 34 may be laid thereon.

In addition, the grid may have non-woven fabric attached to one surface of the grid.

The goose asphalt paving method for laying on top of concrete or steel deck with such a waterproof structure is as follows.

First, the first step is to clean the upper part of the floor plate 10, which is a concrete or steel plate, and remove foreign substances.

Here, in the first step, washing with water may be performed as long as the concrete surface is thoroughly cleaned to remove foreign substances. However, a specific cleaning solution must be used to ensure that mold and other viral microorganisms are completely removed from the surface.

If a special cleaning solution is used, the first step can use a cleaning solution prepared through the following process.

For example, the washing liquid includes a first mixing process in which 80 g of calcium carbonate, 30 g of acetic acid, 35 g of sodium hydroxide, and 20 g of hydrogen peroxide are added to the rotatable drum body based on 3 liters of water and stirred for 30 minutes at a speed of 100 rpm; A second mixing process of adding 35 parts by weight of beer to 100 parts by weight of the first mixing liquid that has undergone the first mixing process and then stirring for an additional 10 minutes; A third mixing process is performed by adding 25 parts by weight of salt water mixed with water and sea salt at a weight ratio of 6:4 to the second mixing solution that has undergone the second mixing process, followed by stirring for an additional 10 minutes.

When the cleaning solution prepared in this way is used, acetic acid, a weak acid, and sodium hydroxide, a strong base, react and neutralize as shown in the reaction equation below, producing water and producing sodium acetate.

CH ₃ COOH + NaOH → H ₂ O + CH ₃ COONa

The sodium acetate obtained as a result exists in the form of acetate ions (CH ₃ COO ^- ) and sodium ions (Na ⁺ ) in water, and these act on the concrete surface to sterilize microorganisms and viruses present on the surface.

At the same time, calcium carbonate helps promote the activity of these ions, and in the process, hydrogen peroxide further promotes the generation of bubbles, further increasing the surface cleaning task.

In addition, the alcohol component and sodium chloride component remove bad odors, and 20 parts by weight of sodium chlorite and 20 parts by weight of citric acid are added to beer for 100 parts by weight of beer to generate chlorine dioxide gas to increase deodorizing power.

Next, a second step is performed to form a primer layer 20 by applying a primer to the upper part of the concrete or steel deck 10 from which foreign substances have been removed.

At this time, the primers are as described above.

Afterwards, the third step is performed to form the goose asphalt pavement layer 32 by laying the goose asphalt mixture on the upper part where the primer is applied.

Then, the fourth step of forming the modified asphalt pavement layer (34) is performed by laying the modified asphalt mixture on the upper part of the goose asphalt pavement layer (32). When the installation is completed in this way, the asphalt pavement layer (30) is 2-layer. It has a (Two-layer) structure.

Here, when attaching the above-mentioned grid, the step of attaching the grid may be further performed after the second step, or the step of attaching the grid may be performed between the fourth and fifth steps. there is.

Meanwhile, three samples according to the composition and packaging method according to the present invention were tested for fluidity. In this case, the composition of the sample was within the composition range of the present invention.

In addition, the specification standard for fluidity is 20 mm/sec or less, and the test results showed that the fluidity was satisfied with an average of 16 mm/sec.

Additionally, the amount of penetration was tested.

The penetration test is a test that measures the stability of the asphalt mixture. A specimen is produced without compaction from a sample collected in the laboratory or field in a standardized mold (7 × 7 × 7 cm), and the produced specimen is tested on a penetration test equipment. The test method is to immerse the manufactured specimen in water at 40℃ for 1 hour, then load a load of 52.5kg on a penetration rod with a bottom of 5cm2 for 30 minutes and measure the amount of penetration. The results are [Table 1]. ], it was measured to be an average of 1.43 mm and met the standard.

In addition, low-temperature bending deformation was also tested.

The test for bending deformation at low temperatures is a test that evaluates the low-temperature characteristics of asphalt mixtures that require bending performance, such as steel-bed pavement.

The test method is to cure a specimen with a length of 300 mm, a width of 100 mm, and a thickness of 50 mm in a chamber at a low temperature (-10 ± 1°C for more than 6 hours), then fix it on a point-to-point length of 200 mm at a low temperature, and load at a rate of 50 mm. This is a test to determine the breaking strain by applying a load at a speed of /min, and the breaking strain is specified as 8.0 × 10 ^-3 or more in the Gus asphalt pavement specifications. The test results are as shown in [Table 2] below, and all met the specifications of 8.0×10 ^-3 or more.

Meanwhile, an adhesion enhancer may be applied between the primer layer 20 and the asphalt pavement layer 30 to improve the adhesion between them.

This adhesion improver may include 63 parts by weight of water, 13 parts by weight of isopentylacrylate, 17 parts by weight of vinyltrimethoxysilane, 4 parts by weight of ammonium persulfate, and 3 parts by weight of sodium bicarbonate.

Isopentylacrylate and vinyltrimethoxysilane play a role in providing adhesion and adhesion, ammonium persulfate acts as a catalyst, and sodium bicarbonate acts as a buffer.

The reason for limiting the constituent materials and components and limiting the mixing ratio as described above is that the present inventor analyzed the test results after repeated failures and found that the optimal effect was achieved with the above-mentioned constituents and numerical ratio. indicated.

In addition, a fouling-resistant coating layer made of an anti-fouling coating composition may be applied to the upper surface of the modified asphalt pavement layer to improve fouling resistance.

The composition of the fouling-resistant coating layer contains cetylpyridinium chloride and alkyldimethylammonium halide in a molar ratio of 1:0.01 to 1:2, and the total content of cetylpyridinium chloride and alkyldimethylammonium halide is 1 to 1 for the entire aqueous solution. It is 12% by weight.

The molar ratio of cetylpyridinium chloride and alkyldimethylammonium halide is preferably 1:0.01 to 1:2. If the molar ratio is outside the above range, the applicability of the modified asphalt pavement layer deteriorates or moisture adsorption on the surface increases after application. Therefore, there is a problem in that the coating film is removed.

The cetylpyridinium chloride and alkyldimethylammonium halide are preferably used in an amount of 1 to 12% by weight in the total composition aqueous solution. If the amount is less than 1% by weight, there is a problem that the applicability of the modified asphalt pavement layer is reduced, and if it exceeds 12% by weight, the application is difficult. Crystal precipitation is likely to occur due to an increase in film thickness.

Meanwhile, it is preferable to apply the fouling-resistant coating composition on the modified asphalt pavement layer by spraying. In addition, the final coating film thickness on the modified asphalt pavement layer is preferably 800 to 2200 Å. If the thickness of the coating film is less than 800 Å, there is a problem of deterioration in the case of high temperature heat treatment, and if it exceeds 2200 Å, there is a disadvantage in that crystal precipitation on the coating surface is likely to occur.

Additionally, this stain-resistant coating composition can be prepared by adding 0.1 mole of cetylpyridinium chloride and 0.05 mole of alkyldimethylammonium halide to 1000 ml of distilled water and then stirring.

The reason for limiting the ratio of the components and the thickness of the coating film to the above values is that the present inventor analyzed the test results after repeated failures and found that the ratio showed the optimal anti-contamination application effect.

10: Bottom plate
20: Primer layer
30: Asphalt pavement layer

Claims (15)

The goose asphalt waterproof pavement structure laid on top of a concrete or steel deck includes a floor plate (10); A primer layer (20) applied on the top of the bottom plate (10) to perform an adhesive function; It consists of an asphalt pavement layer (30) laid on the primer layer (20),
The asphalt pavement layer 30 has a two-layer structure in which a goose asphalt pavement layer 32 and a modified asphalt pavement layer 34 are sequentially laid;
The goose asphalt pavement layer 32 is formed by laying a goose asphalt mixture, and the goose asphalt mixture consists of 7-12% by weight of goose asphalt binder, 18-24% by weight of stone dust, 7-12% by weight of aggregate, and the remaining sand. and;
The Goose asphalt binder is mixed with 70-80% by weight of petroleum asphalt and 20-30% by weight of TLA (Trinidad Lake Asphalt);
The petroleum asphalt uses any one selected from straight asphalt, cutback asphalt, emulsified asphalt, blown asphalt, and modified asphalt;
The TLA is laid on top of a concrete or steel plate, characterized in that it contains 30 to 40% by weight of ash, 10 to 12% by weight of asphaltene, 8 to 12% by weight of fixed carbon, 5 to 7% by weight of sulfur, and the remaining carbon disulfide. Goose asphalt waterproof pavement structure. According to paragraph 1,
The primer layer 20 is a goose asphalt waterproof pavement structure installed on top of a concrete or steel deck, characterized in that it is formed by applying a primer composition mixed with asphalt and SBS (styrene-butadiene-styrene) at a weight ratio of 1:1. delete delete delete The goose asphalt waterproof pavement structure laid on top of a concrete or steel deck includes a floor plate (10); A primer layer (20) applied on the top of the bottom plate (10) to perform an adhesive function; It consists of an asphalt pavement layer (30) laid on the primer layer (20),
The asphalt pavement layer 30 has a two-layer structure in which a goose asphalt pavement layer 32 and a modified asphalt pavement layer 34 are sequentially laid;
The modified asphalt pavement layer 34 is composed of 100 parts by weight of straight asphalt, 20 parts by weight of LDPE (Low Density Polyethylene), 5 parts by weight of gutta-percha, and Texanol Ester Alcohol. A goose asphalt waterproof pavement structure laid on top of a concrete or steel deck, characterized in that it is formed by laying 10 parts by weight of phosphite ester and 5 parts by weight of agitated agitated material. According to paragraph 1,
A goose asphalt waterproof pavement structure installed on top of a concrete or steel deck, wherein the goose asphalt pavement layer 32 and the modified asphalt pavement layer 34 each have a thickness of 2.5-4.0 cm. According to paragraph 1,
A goose asphalt waterproof pavement structure installed on a concrete or steel deck, characterized in that a grid-shaped grid is attached to the upper part of the primer layer (20), and a goose asphalt pavement layer (32) is laid on the upper part of the grid. According to paragraph 1,
A goose asphalt waterproof pavement structure installed on top of a concrete or steel deck, characterized in that a grid-shaped grid is attached to the upper part of the goose asphalt pavement layer (32), and a modified asphalt pavement layer (34) is laid on the top of the grid. According to clause 8 or 9,
The grid is a goose asphalt waterproof pavement structure installed on top of a concrete or steel deck, characterized in that the grid is made of glass fiber or polyester fiber with a tensile strength of 50 KN or more and an elongation of 4% or less. According to clause 10,
A goose asphalt waterproof pavement structure installed on top of a concrete or steel deck, characterized in that non-woven fabric is attached to one side of the grid. A first step of cleaning the upper part of the concrete or steel floor plate (10) and removing foreign substances; A second step of forming a primer layer (20) by applying a primer to the upper part of the concrete or steel deck floor plate (10) from which foreign substances have been removed; A third step of forming a goose asphalt pavement layer (32) by laying the goose asphalt mixture on the upper part where the primer is applied; The fourth step of forming the modified asphalt pavement layer (34) by laying the modified asphalt mixture on the upper part of the goose asphalt pavement layer (32) is performed so that the asphalt pavement layer (30) has a two-layer structure. Compose,
The primer layer 20 is formed by applying a primer composition of asphalt and SBS (styrene-butadiene-styrene) mixed at a weight ratio of 1:1; The Goose asphalt mixture consists of 7-12% by weight of Goose asphalt binder, 18-24% by weight of stone dust, 7-12% by weight of aggregate, and the remaining sand; The Goose asphalt binder is mixed with 70-80% by weight of petroleum asphalt and 20-30% by weight of TLA (Trinidad Lake Asphalt); The petroleum asphalt uses any one selected from straight asphalt, cutback asphalt, emulsified asphalt, blown asphalt, and modified asphalt; The TLA is installed on top of a concrete or steel plate, characterized in that it contains 30 to 40% by weight of ash, 10 to 12% by weight of asphaltene, 8 to 12% by weight of fixed carbon, 5 to 7% by weight of sulfur, and the remaining carbon disulfide. Goose asphalt waterproof paving method. According to clause 12,
After the second step and before performing the third step, the step of attaching a grid-shaped grid is further performed, wherein the grid is made of glass fiber or polyester fiber with a tensile strength of 50 KN or more and an elongation of 4% or less. Goose asphalt waterproof paving method for laying on top of concrete or steel deck, characterized in that. According to clause 12,
After the third step and before performing the fourth step, the step of attaching a grid-shaped grid is further performed, wherein the grid is made of glass fiber or polyester fiber with a tensile strength of 50 KN or more and an elongation of 4% or less. Goose asphalt waterproof paving method for laying on top of concrete or steel deck, characterized in that. According to claim 13 or 14,
A goose asphalt waterproof packaging method for laying on top of a concrete or steel deck, characterized in that non-woven fabric is attached to one side of the grid.

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