KR102622360B1 - Bridge surface asphalt pavement using coating waterproofing material and protective material and its construction method - Google Patents

Abstract

The present invention applies a waterproofing layer consisting of an adhesive layer made of a primer and a waterproofing film, forms a protective layer by installing a glass fiber grid or a double-sided silica sand sheet on the surface of the waterproofing layer, and forms a paving layer by laying asphalt on the protective layer. , prevents rainwater from penetrating into the bridge superstructure, protects the protective layer from paving equipment, and suppresses plastic deformation, traffic load, fatigue cracks, etc. of the pavement, using film waterproofing and protective materials to increase service life. The purpose is to provide a bridge asphalt pavement construction method.
The asphalt pavement of a bridge using a waterproofing film and a protective material according to the present invention to achieve the above object includes an adhesive layer in which a primer is applied to a certain thickness on the surface of the bridge superstructure; a waterproofing layer in which a film waterproofing material is laid to a certain thickness on the adhesive layer; a protective layer in which a glass fiber grid or a double-sided silica sand sheet is laid on the waterproofing layer; It is characterized in that it consists of a pavement layer in which asphalt is laid at a certain thickness on the protective layer.
In addition, the bridge surface asphalt pavement construction method using a waterproofing film and a protective material according to the present invention to achieve the above object includes an adhesive layer in which a primer is applied to a certain thickness on the surface of the bridge superstructure; a waterproofing layer in which a film waterproofing material is laid to a certain thickness on the adhesive layer; a protective layer in which a glass fiber grid or a double-sided silica sand sheet is laid on the waterproofing layer; A method of replacing old asphalt pavement using bridge surface asphalt pavement using a coating waterproofing material and a protective material, which consists of a pavement layer in which asphalt is laid at a certain thickness on the protective layer. The asphalt pavement paved on the bridge superstructure is removed to a certain thickness, and , forming a base layer by organizing the base surface (S 1); Forming an adhesive layer by applying a primer consisting of 60 to 65% by weight of oxidized asphalt and 35 to 40% by weight of hydrodesulfurized naphtha on the surface of the base layer (S 2); On the adhesive layer, 100 parts by weight of a coating waterproofing material consisting of 15% by weight of natural asphalt, 65% by weight of straight asphalt, and 20% by weight of synthetic resin, and 100 parts by weight of a fine aggregate binder consisting of 70% by weight of fine aggregate, 1% by weight of reinforcing fiber, and 29% by weight of cement. Forming a waterproof layer by laying a coating waterproofing material (S 3); It is formed on the waterproof layer as a single bundle made of a plurality of warp yarns, and consists of horizontal and vertical rows arranged at a certain interval with an intersection point formed by arranging at least one bundle of the bundles at regular intervals horizontally and vertically. It consists of a fixing line located at each end of the bundle made up of the horizontal or vertical lines and weaving and fixing the horizontal or vertical lines located at the intersection point, and the fixing of the intersection point by the fixed line is done by one of the horizontal or vertical lines. When positioned at either end, it is woven by wrapping each of the bundles formed in the corresponding horizontal or vertical rows and weaving them in a direction that crosses each other when moved to the neighboring horizontal or vertical rows, and a non-woven fabric is attached to one surface. Forming a protective layer by laying a glass fiber grid or a double-sided silica sand sheet (S 4); It is characterized in that it consists of forming a pavement layer by laying asphalt to a certain thickness on the protective layer (S 5).

Description

Bridge surface asphalt pavement using coating waterproofing material and protective material and its construction method}

The present invention relates to a bridge surface asphalt pavement construction method using a coating waterproofing material and a protective material. In particular, a waterproofing layer consisting of an adhesive layer made of a primer and a coating waterproofing material is applied to prevent rainwater from penetrating into the bridge superstructure, and glass as a protective material is applied to the surface of the waterproofing layer. It relates to a bridge surface asphalt pavement construction method using a coating waterproofing material and protective material, which involves installing a fiber grid or a double-sided silica sand sheet to form a protective layer and laying asphalt on the protective layer.

In general, airfield runways that require durability and flatness or roads on which vehicles pass are generally composed of heated asphalt pavement, and are divided into earthworks, bridges, tunnels, etc. depending on the installation location.

In addition, asphalt pavement shrinkage and expansion due to traffic volume, passing load, ground behavior, rainwater, moisture, and external temperature changes, artificially sprayed chloride, ultraviolet rays, and aging of the asphalt composition are direct causes of pavement damage and destruction. .

In addition, asphalt or asphalt mixture undergoes short-term aging (STA) during manufacturing, transportation, and construction, and long-term aging (LTA) during long-term use.

This short-term aging or long-term aging of asphalt causes deformation of asphalt pavement during the process of volatilization in which trace amounts of volatile substances evaporate during manufacturing, laying, and use, which causes the lifespan of asphalt pavement to be shortened. there is.

In addition, the cause of aging of asphalt in use, that is, in use, is that hardening and brittleness increase due to aging of the asphalt composition over time in asphalt pavement, which reduces durability and causes cracking, which is one of the serious damages along with plastic deformation. It becomes the cause of.

In other words, plastic deformation of asphalt occurs approximately 2 to 3 years from the beginning of construction when the fluidity of the composition exists, and cracks occur in the middle stage, approximately 5 to 6 years or more, when the fluidity of the composition is lost.

During this process, damage and damage that occur in asphalt pavement, such as plastic deformation, potholes, surface cracks, reflection cracks, steps, settlement, and freezing, appear, and rainwater and foreign substances penetrate into those areas, which adds to durability, flatness, etc. , usability is reduced, and the repetitive action of this process ultimately raises the problem of low efficiency in maintenance that shortens the lifespan of asphalt pavement and accelerates the resurfacing cycle.

In addition, it is reinforced by effectively responding to the behavior of asphalt pavement exposed to this environment due to the passing load and suppressing and preventing damage and damage to asphalt pavement caused by various factors to ensure durability and extend the lifespan of asphalt pavement. Asphalt pavement is proposed.

Looking at the above-described prior art, the asphalt reinforcement method using glassphalt reinforcement in Republic of Korea Patent No. 10-1077472 is formed by crossing transverse glass fibers and longitudinal glass fibers up and down at intervals of 1.8 to 2.2 cm, and the transverse glass To prevent the fibers from being separated from the longitudinal glass fibers, the longitudinal glass fibers are divided into first and second longitudinal glass fibers and then intersected with the transverse glass fibers, so that the top and bottom cross each other differently, and the transverse glass fibers In order to increase the bonding force between the first and second longitudinal glass fibers, the first and second longitudinal glass fibers are wrapped in the direction in which the first and second longitudinal glass fibers extend. A glass fiber grid network composed of fine glass fibers bonded together; a coating layer formed by impregnating the grid glass fibers into an impregnator containing asphalt emulsion; a silica sand layer formed on the upper side of the mesh glass fiber; A first step of removing the resin film layer of the glass phalt reinforcement formed on the lower side of the grid glass fiber by heating and burning it, and then placing it on the existing asphalt base surface from which the existing asphalt was cut; And it consists of a second step of paving asphalt on top of the glass phalt reinforcement.

In addition, another prior art is the bridge waterproofing structure of Republic of Korea Patent No. 10-1212519, which is provided between the concrete structure forming the top of the bridge and the packaging material applied to the concrete structure to prevent external foreign substances, including moisture, from penetrating into the concrete structure. In the bridge waterproofing structure configured to prevent external substances, a coating waterproofing material applied to the concrete structure to prevent penetration of external foreign substances; It consists of a reinforcing material attached to the coating waterproofing material to prevent cracks from occurring in the coating waterproofing material due to the load acting on the packaging material, and the reinforcing material includes a non-woven fabric attached to the coating waterproofing material; It consists of a grid member integrally provided in a grid shape on the non-woven fabric, the grid member is made of glass fiber, the grid member is formed by coating the glass fiber with bituminous material and then compressing it, and the coating waterproofing material is natural asphalt 10. % to 15%, straight asphalt 55% to 65%, synthetic oil 10% to 20%, and polymer 15% to 25%.

In addition, another prior art is an asphalt pavement plastic deformation prevention method using carbophalt fiber reinforcement disclosed in Republic of Korea Patent No. 10-1482163, which includes the step of forming an asphalt emulsion coating layer of coating the construction surface with an asphalt emulsion; Glass fibers extending in the direction in which the vehicle moves in the asphalt emulsion coating layer; The carbon fibers that cross above and below the glass fibers are formed to form a lattice shape, and the glass fibers are divided into first and second glass fibers and then repeatedly cross each other differently at the top and bottom when they intersect with the carbon fibers. It is formed by forming a grid network on the outside of the glass fiber, in which thin wire fibers are formed to surround the glass fiber; a coating layer formed by impregnating the grid into an impregnator containing asphalt emulsion; a resin film layer formed on the lower side of the grid; The resin film layer of the carbophalt fiber reinforcement, which consists of an anti-slip layer formed on the coating layer coated on the upper side of the grid, is removed by heating and burning, and then placed on the surface where the asphalt emulsion coating is formed. However, during continuous construction, the overlapping of the carbophalt fiber reinforcement is allowed. It consists of a step of forming a carbophalt fiber reinforcement layer within 10 to 20 cm and a step of forming an asphalt pavement layer of paving asphalt to a thickness of 2 to 5 cm on the upper side of the carbophalt fiber reinforcement, and the step of forming the carbophalt fiber reinforcement layer. The resin film layer composed of carbophalt fiber reinforcement is bi-oriented polypropylene with a thickness of 4~8㎛, softening point of 140℃, melting point of 165~170℃, 1㎜ in diameter, 400 holes per ㎡. Alternatively, 100 holes are formed per 1 m2 with a diameter of 4.5 mm.

However, the conventional asphalt pavement as described above does not effectively reduce the load acting on the pavement layer, that is, asphalt, and lateral energy such as vibration or impact according to the passing load, and also does not have a waterproof function, so it is damaged by the base surface and the surface. There is a problem of peeling and peeling phenomenon occurring between asphalts.

Accordingly, in order to solve the above-mentioned problems, the reinforcing fiber grid of Republic of Korea Patent No. 10-1860800, a coating device for applying the reinforcing fiber grid, and a deformation-resistant reinforced asphalt pavement construction method using the reinforcing fiber grid and the application device were proposed. It has been done.

Here, the reinforcing fiber grid of the above-mentioned Patent No. 10-1860800 is formed between a base surface and asphalt to improve adhesion to the asphalt and durability, and is formed as a single tying line made of a plurality of warp yarns, and the tying line is A reinforcing fiber grid comprising a plurality of horizontal and vertical rows arranged horizontally and vertically at regular intervals to form intersection points and regular intervals, and including fixing lines to maintain the horizontal rows fixed to the vertical rows, wherein the intersection points A plurality of fixed lines are positioned at each end of a vertical line configured to intersect a horizontal line, and each of the plurality of fixed lines wraps around the horizontal line while pointing from bottom to top, thereby ensuring the position of the horizontal line on the vertical line. A plurality of fixing lines are fixed so that the position of the horizontal lines intersecting the vertical lines is firmly fixed by weaving them so that they are crossed in the diagonal direction when each of the plurality of entwined fixed lines is placed in the neighboring horizontal line. and, at certain intervals, each of the plurality of fixing lines, which are alternately fixed in each of the plurality of vertical lines through the intersection points, are knitted together in a knitting manner to integrate the fixing lines, and the integrated fixing lines An asphalt adhesive is applied to any one of a plurality of vertical lines to maintain a fixed state as the integrated fixing line is adhered, and the asphalt adhesive includes 40 to 65 parts by weight of petroleum-based asphalt; 7 to 10 parts by weight of urethane rubber; 15 to 20 parts by weight of a reactive inorganic filler; 7 to 10 parts by weight of absorbent polymer resin; It is composed of 5 to 10 parts by weight of petroleum resin and 1 to 10 parts by weight of an isocyanate-based compound, and the warp yarn is characterized by one of glass fiber and carbon fiber or a mixture of them.

In addition, the reinforcing fiber grid application device of the above-mentioned Patent No. 10-1860800 is an application device for applying a reinforcing fiber grid that is configured between a new or repaired base surface and asphalt to improve adhesion and durability to the asphalt. The application device includes a frame, a compression roller configured at the lower end of the frame to support the reinforcing fiber grid to maintain the reinforcing fiber grid stably seated on the base surface, and a winding roll configured on one side of the frame on which the reinforcing fiber grid is wound. It consists of a winding part that is installed and supports the natural unwinding along the direction of movement of the applicator, and in the applicator, a plurality of fixing hardware is fixed to the reinforcing fiber grid laid on the base surface at regular intervals so that the reinforcement is provided. It is composed of a directly connected part to improve the fixing force to the fiber grid, and a plurality of directly connected parts are formed at regular intervals to provide a striking force to drive the fixed hardware into the base surface. The striking cylinder rotates reciprocally at a certain angle to secure the fixed hardware. It is composed of a rotating member that guides the device to be driven into the background after acquiring it, and a supply member that is configured to be spaced at a certain distance from the striking cylinder and accommodates a plurality of fixed hardware to support the supply of fixed hardware to the striking cylinder. It is characterized by

In addition, the deformation-resistant reinforced asphalt pavement construction method using the reinforcing fiber grid and application device of the above-mentioned Patent No. 10-1860800 includes a new or repaired base surface; an asphalt adhesive applied to the base surface to a certain thickness; An asphalt pavement construction method comprising a reinforcing fiber grid applied on the asphalt adhesive and asphalt applied to the base surface to a certain thickness to form a road surface, comprising: a base surface preparation step of preparing the base surface; An asphalt adhesive application step of applying an asphalt adhesive of a certain thickness on the base surface prepared through the base surface preparation step; When the asphalt adhesive of a certain thickness is applied to the base surface through the asphalt adhesive application step, the coating device is moved to the base surface and the reinforcing fiber grid wound on the winding portion of the applicator is applied to the base surface. , the coating agent is uniformly applied on the reinforcing fiber grid by the application member of the coating application portion configured in front based on the moving direction of the coating device, and the base is applied by the compressing force of the compression roller configured at the rear of the coating application portion. A reinforcing fiber grid application step of maintaining the reinforcing fiber grid adhered to the base surface by using an asphalt adhesive applied to the surface and a coating agent applied to the reinforcing fiber grid; When the reinforcing fiber grid is applied to the base surface through the reinforcing fiber grid application step, the fixing hardware is magnetically attached to the piston of the striking cylinder from the supply member formed in the application device, and is attached to the rotating member formed on one side of the striking cylinder. When the striking cylinder is erected vertically as it rotates, pressure is applied to the striking cylinder and the fixing hardware is embedded in the base surface due to the advancement of the piston, so that the reinforcing fiber grid is firmly fixed to the base surface. When the fixing of the reinforcing fiber grid with a plurality of fixing hardware is completed through the fixing hardware fixing step, a nonwoven fabric application step of laying nonwoven fabric on the reinforcing fiber grid to facilitate smooth passage of work vehicles; When the application of the non-woven fabric on the reinforcing fiber grid is completed through the non-woven fabric application step, an asphalt paving step is performed to complete the road surface by paving asphalt of a certain thickness on the base surface, and the asphalt adhesive is 40 to 65 weight. wealth of petroleum-based asphalt; 7 to 10 parts by weight of urethane rubber; 15 to 20 parts by weight of a reactive inorganic filler; 7 to 10 parts by weight of absorbent polymer resin; It is composed of 5 to 10 parts by weight of petroleum resin and 1 to 10 parts by weight of an isocyanate-based compound, and the coating agent includes 20 to 40 parts by weight of natural asphalt; 25 to 30 parts by weight of straight asphalt; 25 to 30 parts by weight of synthetic oil; It is characterized by being composed of 5 to 10 parts by weight of polymer and 5 to 10 parts by weight of epoxy.

Registered Patent No. 10-1860800, which has the configuration described above, has the following problems.

The reinforcing fiber grid installed on the upper part of the waterproofing layer is subject to cracks, potholes, and damage due to ultraviolet rays, calcium chloride sprayed for snow removal in winter, loads exerted by heavy vehicles, and expansion and contraction due to atmospheric temperature, and the reinforcing fiber grid is damaged due to long-term use. Durability deteriorates due to aging, and as a result of this phenomenon, some of the rainwater and moisture-containing foreign matter on the reinforced fiber grid pavement surface penetrates into the reinforced fiber grid instead of being drained, and as a result, the structure may suffer frost damage in the winter. If this continues for a long period of time, the bridge surface is carbonated and deterioration progresses rapidly, which leads to a decrease in durability and loss of function of the bridge surface. For this reason, there is a problem in which a waterproof layer must be installed.

Registered Patent 10-1860800 Registered Patent 10-2243082 Registered Patent 10-2245846 Registered Patent 10-2246077 Registered Patent 10-2250831 Registered Patent 10-2256128 Registered Patent 10-2363072

Accordingly, the present invention was devised to solve the problems described above, by applying a waterproof layer consisting of an adhesive layer made of a primer and a waterproofing film, and installing a glass fiber grid or a double-sided silica sand sheet as a protective material on the surface of the waterproofing layer to protect it. By forming a layer and laying asphalt on the protective layer to form a pavement layer, it prevents rainwater from penetrating into the bridge superstructure, protects the protective layer from paving equipment, and prevents plastic deformation of the pavement, traffic load, and fatigue. The purpose is to provide a bridge surface asphalt pavement construction method using film waterproofing and protective materials to suppress cracks and increase the service life.

The asphalt pavement of a bridge using a waterproofing film and a protective material according to the present invention to achieve the above object includes an adhesive layer in which a primer is applied to a certain thickness on the surface of the bridge superstructure; a waterproofing layer in which a film waterproofing material is laid to a certain thickness on the adhesive layer; a protective layer in which a protective material, such as a glass fiber grid or a double-sided silica sand sheet, is laid on the waterproofing layer; It is characterized in that it consists of a pavement layer in which asphalt is laid at a certain thickness on the protective layer.

In addition, the bridge surface asphalt pavement construction method using a waterproofing film and a protective material according to the present invention to achieve the above object includes an adhesive layer in which a primer is applied to a certain thickness on the surface of the bridge superstructure; a waterproofing layer in which a film waterproofing material is laid to a certain thickness on the adhesive layer; a protective layer in which a protective material, such as a glass fiber grid or a double-sided silica sand sheet, is laid on the waterproofing layer; A method of replacing old asphalt pavement using bridge surface asphalt pavement using a coating waterproofing material and a protective material, which consists of a pavement layer in which asphalt is laid at a certain thickness on the protective layer. The asphalt pavement paved on the bridge superstructure is removed to a certain thickness, and , forming a base layer by organizing the base surface (S 1); Forming an adhesive layer by applying a primer consisting of 60 to 65% by weight of oxidized asphalt and 35 to 40% by weight of hydrodesulfurized naphtha on the surface of the base layer (S 2); On the adhesive layer, 100 parts by weight of a coating waterproofing material consisting of 15% by weight of natural asphalt, 65% by weight of straight asphalt, and 20% by weight of synthetic resin, and 100 parts by weight of a fine aggregate binder consisting of 70% by weight of fine aggregate, 1% by weight of reinforcing fiber, and 29% by weight of cement. Forming a waterproof layer by laying a coating waterproofing material (S 3); It is constructed between the base surface and asphalt on the waterproofing layer, and the glass fiber grid is formed of a single bundle made of a plurality of warp yarns, and is formed by arranging at least one bundle of the bundles horizontally and vertically at regular intervals. It is composed of horizontal and vertical lines arranged to form a certain distance from the point, and is composed of a fixing line located at each end of the bundle line made of the horizontal or vertical lines and weaving and fixing the horizontal or vertical lines located at the intersection point, Fixation of the intersection point by a fixing line is located at both ends of one of the horizontal or vertical lines, and wraps each of the tie lines formed in the corresponding horizontal or vertical line in a direction that crosses each other when moved to a neighboring horizontal or vertical line. Forming a protective layer by laying a glass fiber grid or a double-sided silica sand sheet that is formed by weaving and has a non-woven fabric attached to one surface (S 4); It is characterized in that it consists of forming a pavement layer by laying asphalt to a certain thickness on the protective layer (S 5).

As described above, the bridge surface asphalt pavement construction method using the coating waterproofing material and protective material according to the present invention has the following effects.

First, the present invention applies a waterproof layer consisting of an adhesive layer made of a primer and a waterproofing film, installs a glass fiber grid or a double-sided silica sand sheet as a protective material on the surface of the waterproof layer to form a protective layer, and lays asphalt on the protective layer, It has the effect of preventing rainwater from penetrating into the bridge superstructure, protecting the protective layer from pavement equipment, and suppressing plastic deformation, traffic load, and fatigue cracking of the pavement, thereby increasing the service life.

Second, the present invention is a bridge superstructure that requires waterproof function, and the waterproof layer composed of the steel plate of the deck and steel deck, and the waterproofing film installed on the base surface of the structure such as covered roads and underground structures is a surface of the bridge superstructure that has durability and behaves as a waterproof layer. It is installed with the ability to respond to cracks, thereby maintaining and securing the durability of the bridge surface for a long period of time. In addition, the waterproof layer blocks foreign substances including rainwater and moisture into the surface of the bridge superstructure, fundamentally preventing them from penetrating into the surface of the bridge superstructure in winter. There is an advantage that frost damage does not occur.

Third, the present invention has the function of rapidly curing the waterproofing material using an indirect heating melter and the function of immediately applying asphalt paving, which is a follow-up process, to the base surface, thereby enabling early opening of traffic.

Fourth, the present invention can be applied to the paving of the surface of a bridge superstructure and has the advantage of enabling early opening to traffic by shortening the curing time.

Fifth, the present invention dramatically reduces the curing time by using an indirect heating melter, which is a construction equipment, and forms a protective layer by combining a double-sided silica sand sheet or a glass fiber grid on the applied waterproofing material.

Sixth, the present invention can be constructed only by applying adhesive to the surface of a bridge superstructure with little movement, omitting the installation of a double-sided silica sand sheet or grid on the base surface, and installing only the coating waterproofing material.

Seventh, the present invention can additionally block the infiltration of groundwater into structures installed underground, and in the case of hydraulic structures such as drainage ponds, purification ponds, sedimentation ponds, etc., expansion parts are installed at regular intervals, and the expansion grooves of the expansion parts can be applied to use them. You can.

In particular, the present invention can be used on bridge decks, covered road structures, etc. by applying a coating waterproofing material including an expansion groove with an expansion part.

Figure 1 is an illustration showing the main cross-sectional pavement of asphalt bridge surface using a waterproofing film and a protective material according to the present invention.
Figure 2 is an illustration showing a cross-sectional pavement of an asphalt protective wall on a bridge using a waterproofing film and a protective material according to the present invention;
Figure 3 is a detailed view showing asphalt pavement of a bridge using a waterproofing film and a protective material according to the present invention;
Figure 4 is a perspective view showing an exploded asphalt pavement using a waterproofing film and a protective material according to the present invention;
Figure 5 is a process diagram showing the process of constructing a bridge surface asphalt main cross-section pavement using a film waterproofing material and a protective material according to the present invention;
Figure 6 is a process chart showing the process of constructing the end paving of an asphalt protective wall on a bridge using a waterproofing film and a protective material according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the attached illustration drawings.

[Bridge surface asphalt pavement]

Figure 1 is an exemplary diagram showing the main cross-sectional pavement of asphalt bridge surface using a film waterproofing material and a protective material according to the present invention, and Figure 2 is an exemplary diagram showing a cross-sectional pavement of a bridge asphalt protective wall using a film waterproofing material and a protective material according to the present invention. , Figure 3 is a detailed view showing a bridge asphalt pavement using a film waterproofing material and a protective material according to the present invention, and Figure 4 is an exploded perspective view showing a bridge asphalt pavement using a film waterproofing material and a protective material according to the present invention.

As shown in these figures, the bridge asphalt pavement (P) using the coating waterproofing material and the protective material according to the present invention includes an adhesive layer (20) formed by applying a primer to the surface of the bridge superstructure (10); A waterproofing layer (30) in which a coating waterproofing material is formed on the adhesive layer (20); A protective layer (40) in which a glass fiber grid (42) or a double-sided silica sand sheet is formed on the waterproof layer (30); It consists of a pavement layer (50) in which asphalt is formed on the protective layer (40).

In other words, the bridge surface asphalt pavement (P) using the coating waterproofing material and the protective material according to the present invention has a structure in which an adhesive layer 20, a waterproofing layer 30, a protective layer 40, and a paving layer 50 are sequentially stacked.

Here, the adhesive layer 20 is formed by applying a primer to the surface of the bridge superstructure 10.

The primer consists of 60 to 65% by weight of oxidized asphalt and 35 to 40% by weight of hydrodesulfurized naphtha.

In particular, 2.2 to 18.5% by weight of an additive consisting of benzene, n-hexane, toluene, xylene, and ethyl benzene is mixed with 100% by weight of the primer. .

Here, the oxidized asphalt is purified by blowing air while heating the semi-solid residue at the end of the distillation process for collecting light oil from petroleum, and forms a dark brown or black elastic semi-solid or solid state, heat resistance and Because it has high impact resistance and low moisture resistance, it is used for thermal insulation, cold insulation, waterproofing, packaging, and acid-resistant construction.

In other words, oxygen in the air oxidizes asphalt, which causes a dehydrogenation reaction of hydrocarbon components in asphalt, resulting in condensation and polymerization reactions among the molecules that make up asphalt. When this happens, it changes into asphalt with a high softening point and low penetration, which is called oxidized asphalt.

In addition, the hydrodesulfurization naphtha is made by catalytically reforming naphtha obtained by distilling crude oil to aromatize at least part of the naphtha and increase the octane number of naphtha. Since reforming catalysts are generally deactivated by sulfur compounds, naphtha must be desulfurized and then catalytically reformed. In the hydrodesulfurization treatment method, the raw material spill is desulfurized by contacting it with a catalyst suitable for hydrodesulfurization treatment at high temperature under pressurized hydrogen atmosphere.

Here, the catalyst typically used to hydrodesulfurize the naphtha comprises Group VIII elements (e.g. cobalt and nickel) and Group VI elements (e.g. chromium, molybdenum and tungsten) supported on a suitable carrier. The hydrodesulfurization treatment method is usually performed at a temperature of about 300 to 400° C., a hydrogen partial pressure of about 30 to about 200 kg/cm2, and a liquid space velocity per hour of about 0.1 to about 10 liters/hr.

Catalysts typically used to hydrodesulfurize naphtha include a combination of Part VIII and Part VI elements (e.g. a combination of cobalt and molybdenum) supported on a suitable carrier (e.g. alumina). The hydrodesulfurization treatment method is usually carried out at a temperature of about 280 to about 350° C., a hydrogen partial pressure of about 15 to about 40 kg/cm2, and an LHSV of about 2 to about 8 liters/hr.

Meanwhile, additives added to the primer include benzene, n-hexane, toluene, xylene, and ethyl benzene.

That is, the primer additive is a mixture of benzene, normal hexane, toluene, xylene, and ethylbenzene.

Here, benzene is a volatile liquid hydrocarbon made by distilling and refining coal tar. It has a planar regular hexagonal ring structure with six carbon atoms in the same plane, and is the most basic aromatic hydrocarbon material, and a representative example is annulene (6-annulene).

In addition, normal hexane belongs to aliphatic hydrocarbons and exists in cracked oil and crude oil of petroleum hydrocarbons. At room temperature and pressure, it is a colorless and transparent liquid with a boiling point of 69°C and is flammable. It dissolves some organic substances in addition to animal and vegetable fats and oils and mineral oil.

In addition, toluene is one of the most representative aromatic hydrocarbons, and compared to benzene, which has six hydrogens, toluene is substituted with a methyl group that has an electron donor effect, allowing various electrophilic substitution reactions. In particular, 2,4,6-trinitrotoluene (TNT), a compound with three nitro groups substituted, is used as an explosive compound.

Additionally, the xylene is also called dimethylbenzene and xylol. Chemical formula C8H10 or C6H4(CH3)2. It has a structure in which two methyl groups are bonded to a benzene ring, and there are three isomers: orthoxylene, metaxylene, and paraxylene. It is a colorless liquid with a sweet odor and is highly flammable, with a molecular weight of 106.17. Melting point, boiling point, specific gravity, etc. differ depending on the isomer. All isomers are insoluble in water, but mix well with organic solvents such as ether and benzene.

Meanwhile, the ethylbenzene has the chemical formula C8H10. It is a colorless liquid, with a molecular weight of 106.17, a melting point of -94.4℃, a boiling point of 136.5℃, and a specific gravity of 0.8672. It has a characteristic aromatic hydrocarbon odor. It is contained in petroleum, gasoline, naphtha, etc., but it is difficult to separate. It is obtained by mixing benzene with aluminum chloride, blowing in ethylene, and distilling it. Industrially, it is manufactured by alkylating benzene with ethylene using aluminum chloride as a catalyst. It is used as a raw material because it becomes styrene through a dehydrogenation reaction.

A primer composed of the above-mentioned composition can obtain the following test results.

Primer test results serial number Test items unit Test Methods Test result One Viscosity (Spindle #61, 20RPM, 25℃) cP JIS K 6833:2008 210 2 Non-volatile matter % JIS K 6833:2008 51.1 3 Touch drying time minute JIS K 5600:1999 10 4 Low temperature flexibility (-10℃) - JIS K 5600:1999 clear 5 Adhesion - JIS K 5400:1999 10 6 Adhesion after moisture resistance - JIS K 5400:1999 10 7 Adhesion after salt spray - JIS K 5400:1999 10 8 Workability - KS M 5000 : 2019 clear

In addition, the waterproof layer 30 is formed by laying a waterproofing film on the adhesive layer 20 to which a primer is applied.

Here, the film waterproofing material includes 100 parts by weight of a film waterproofing material consisting of 15% by weight of natural asphalt, 65% by weight of straight asphalt, and 20% by weight of synthetic resin; It consists of 100 parts by weight of a fine aggregate binder consisting of 70% by weight of fine aggregate, 1% by weight of reinforcing fiber, and 29% by weight of cement.

That is, the coating waterproofing material is composed of a coating waterproofing material and a fine aggregate binder.

Here, the coating waterproofing material is composed of natural asphalt, straight asphalt, and synthetic resin.

The natural asphalt is a type of natural solid petroleum bitumen, which is produced from asphaltic crude oil in the early stages of deterioration and is produced near the surface of oil fields. It is similar to asphalt obtained by oil refining. Specific gravity is 0.95-1.15, melting temperature is 15-175℃, fixed carbon content is 1-25%, and solubility in carbon disulfide is 60-98%.

In addition, the straight asphalt is extracted from crude oil without changing the asphalt component as much as possible, and asphalt is a solid polymer called asphaltene in a highly viscous oil-like or resinous substance called petrolene or marten. This is dispersed. Straight asphalt is mainly used as a paving material because it is dominated by the properties of petroleum and has good elasticity and adhesion, but the temperature reduction ratio is high.

Additionally, the synthetic resin refers to synthetic polymer materials other than those used as fibers and rubber. A word created in response to natural resin. It is broadly divided into thermoplastic resins and thermosetting resins. In addition, resins obtained through chemical processing using natural polymer materials such as celluloid and acetylcellulose as raw materials are called semi-synthetic resins, and synthetic resins and semi-synthetic resins are also collectively called plastics.

Meanwhile, the fine aggregate binder is composed of fine aggregate, reinforcing fiber, and cement.

Here, the fine aggregate refers to aggregate that passes all of the 10 mm sieve specified in the standard sieve, almost all of the 4.76 mm sieve, and almost all remaining in the 0.074 mm sieve, and generally refers to the particle size of 5 mm or less.

Additionally, the reinforcing fiber is made of any one of glass fiber, carbon fiber, and fiber-reinforced plastic.

The following test results can be obtained from the coating waterproofing material composed of the above-mentioned composition.

Paint waterproofing material test results serial number Test/inspection items unit Test and inspection methods Test/inspection results One Workability -











KS F 4932 : 2017 clear 2 Non-volatile matter % 99.4 3 Touch dry time minute 10 4

Seal
Performance
tensile strength Untreated N/㎟ 2.07 Alkaline treatment N/㎟ 1.93 Heat treatment N/㎟ 1.94
elongation rate Untreated % 899 Alkaline treatment % 860 Heat treatment % 803 5 Permeability resistance - Not a pitcher 6 Heat resistance and dimensional stability (150℃, 30 minutes) % -0.4 7 Crack resistance -20℃ - No crazing, tears or breaks 8 Chloride ion penetration resistance coulombs 1.24 9 inner dent - 0.20 10 Fatigue resistance - 3.1 11 shear
adhesion
Performance shear adhesion
robbery -20℃ MPa 4.2 20℃ MPa 0.20 shear adhesion
strain rate -20℃ % 3.1 20℃ % 4.2 12 tensile bond strength -20℃ MPa 1.51 20℃ MPa 0.71 13 7 days after immersion
tensile bond strength 20℃ MPa 0.53

In addition, the protective layer 40 is formed by laying a double-sided silica sand sheet or a glass fiber grid 42 on the waterproof layer 30.

Here, the double-sided silica sand sheet is manufactured in the form of a roll of a certain thickness by using polyester long-fiber nonwoven fabric as the central reinforcement, and the upper and lower surfaces are completely impregnated with SBS modified asphalt. It is a composite non-exposed waterproof sheet with the front and back surfaces finished with silica sand. .

Quality standards for double-sided silica sand sheets tensile strength
(N/mm) 13 or more Shear bond deformation
(%, 20℃) 1.0 or higher Heat resistance, dimension safety
(150℃, 30 minutes) Within ±2.0 Elongation rate (%) 33 and above Tensile adhesive strength
(N/㎟, -20℃) 1.2 and above Naeumpum indentation clear Shear bond strength
(N/㎟, -20℃) 0.8 or higher Tensile adhesive strength
(N/㎟, 20℃) 0.6 or higher Fatigue resistance Shear bond strength
(N/㎟, 20℃) 0.15 or higher Permeability resistance clear crack resistance,
Low temperature bendability
(-20℃) Shear bond deformation
(%, -20℃) 0.5 or more Chloride ion penetration resistance 100 or less joint strength
(N/mm) 5.0 or higher

Physical properties table of double-sided silica sand sheet Chemical name Common and alternative names content(%) asphalt Petroleum Asphalt, All Grades: Asphaltem; bitumen; bitumen, asphalt; Bituminous materials, asphalt, petroleum bitumen; 60~70 calcium carbonate calcium carbonate; calcite; limestone; marble; 10~20 Styrene-butadiene rubber STYRENE-BUTADIENE RUBBER 7~15 polyethylene terephthalate POLYETHYLENE TEREPHTHALATE 5~10 Hydrotreated heavy paraffin distillate (petroleum) emulsion oil 1~8 quartz free silicic acid; fiber glass; silicon dioxide 3~13 polyethylene no data 1~8

In addition, the glass fiber grid 42 is formed of a single bundle made of a plurality of warp yarns, and is arranged so that there is a certain distance from the intersection point formed by arranging at least one bundle row at regular intervals horizontally and vertically. It is composed of horizontal and vertical lines, and is located at each end of the bundle line made of the horizontal or vertical lines, and consists of a fixing line that weaves and fixes the horizontal or vertical lines located at the intersection point, and the intersection point is fixed by the fixing line. When placed on both ends of either the horizontal or vertical row, it is formed by weaving by wrapping each bundled rope formed in the corresponding horizontal or vertical row and weaving in a direction that crosses each other when moved to the neighboring horizontal or vertical row, and one side It is a member with non-woven fabric 44 attached to the surface.

That is, the glass fiber grid 42 is composed of a grid and non-woven fabric 44.

Here, the glass fiber grid 42 is composed of a woven net or mesh net that is fixed in a floating manner, and an attachment fabric is attached to one side, thereby improving durability and providing functionality to prevent deformation due to an applied load, vibration, impact, etc. It improves.

glass fiber grid
division
grid
(Center spacing/cm
elastic modulus
(Gpa)
Elongation at break
(%)
Packaging specifications
(Width m × Length m/roll
Coating (grid)
note
1st coating

2nd coating AP-G200 2.54×2.54 70~ 4 or less 1.0, 2.0 ×50∼100 o -/- AP-G300 2.54×2.54 70~ 4 or less 1.0, 2.0 ×50∼100 o -/-

Meanwhile, the pavement layer is asphalt laid at a certain thickness on the protective layer 40.

The bridge surface asphalt pavement using the coating waterproofing material and protective material according to the present invention, which has the above-described configuration, applies a waterproofing layer (30) consisting of an adhesive layer made of a primer and a coating waterproofing material, and a glass fiber grid as a protective material is applied to the surface of the waterproofing layer (30). (42) Alternatively, a protective layer is formed by installing a double-sided silica sand sheet, and asphalt is laid on the protective layer to prevent rainwater from penetrating into the superstructure of the bridge superstructure, to protect the protective layer from paving equipment, and to prevent paving. It has the effect of increasing service life by suppressing plastic deformation, traffic load, fatigue cracks, etc.

[Construction method of aged asphalt pavement]

Hereinafter, the construction of bridge surface asphalt pavement using the coating waterproofing material and protective material according to the present invention composed of the above-described configuration will be described.

Figure 5 is a process diagram showing the process of constructing a bridge surface asphalt main cross-section pavement using a waterproofing film and a protective material according to the present invention.

As shown in these drawings, the bridge asphalt pavement construction method using the coating waterproofing material and the protective material according to the present invention includes an adhesive layer (20) in which a primer is applied to a certain thickness on the surface of the bridge superstructure (10); A waterproofing layer (30) in which a film waterproofing material is laid at a certain thickness on the adhesive layer (20); A protective layer (40) in which a glass fiber grid (42) or a double-sided silica sand sheet as a protective material is laid on the waterproof layer (30); A method of replacing and constructing old asphalt pavement using bridge surface asphalt pavement using a coating waterproofing material and a protective material consisting of a pavement layer (50) in which asphalt is laid to a certain thickness on the protective layer (40),

Step (S 1) of removing the asphalt pavement on the bridge superstructure 10 to a certain thickness and preparing the base surface to form the base layer 12;

Forming an adhesive layer 20 by applying a primer consisting of 60 to 65% by weight of oxidized asphalt and 35 to 40% by weight of hydrodesulfurized naphtha on the surface of the base layer 12 (S 2);

On the adhesive layer 20, 100 parts by weight of a coating waterproofing material consisting of 15% by weight of natural asphalt, 65% by weight of straight asphalt, and 20% by weight of synthetic resin, 70% by weight of fine aggregate, 1% by weight of reinforcing fiber, and 29% by weight of cement are fine aggregate binders 100. Step (S3) of forming a waterproof layer 30 by laying a coating waterproofing material or a double-sided silica sand sheet made of weight parts;

A horizontal line formed on the waterproof layer 30 by a single bundle made of a plurality of warp yarns, and arranged so as to form a certain distance from an intersection point formed by arranging at least one bundle of the bundles horizontally and vertically at regular intervals, and It is composed of a vertical line, and is composed of a fixing line that is located at each end of the horizontal line or a tying line composed of vertical lines and fixes the horizontal or vertical lines located at the intersection point by weaving, and the fixation of the intersection point by the fixed line is done by the horizontal line. Or, when located at both ends of one of the vertical rows, it is formed by weaving in a direction that crosses each other when moving to a neighboring horizontal row or vertical row while wrapping each of the bundle rows formed in the corresponding horizontal row or vertical row, and a non-woven fabric is formed on one surface. Forming a protective layer 40 by laying a glass fiber grid 42 or a double-sided silica sand sheet to which (44) is attached (S 4); Asphalt pavement is constructed by sequentially performing the step (S 5) of laying asphalt to a certain thickness on the protective layer 40 to form the pavement layer 50.

That is, the bridge surface asphalt pavement construction method using the coating waterproofing material and the protective material according to the present invention includes a base layer 10 forming step (S 1), an adhesive layer 20 forming step (S 2); Waterproofing layer 30 forming step (S 3); It is characterized by sequentially constructing the protective layer 40 forming step (S 4) and the packaging layer forming step (S 5).

Here, the base layer forming step (S 1) is a step of removing laitance, dust, contaminants, etc. from the entire existing aged asphalt pavement using equipment such as a wheel saw.

At this time, a combination of appropriate equipment and manpower is used to remove the entire aged asphalt pavement.

Subsequently, in the adhesive layer 20 forming step (S 2), a primer consisting of 60 to 65% by weight of oxidized asphalt and 35 to 40% by weight of hydrodesulfurization naphtha is applied to the surface of the base layer 12, 100% by weight of the primer, 0.1 to 0.5% by weight of benzene, 2 to 3% by weight of n-hexane, 1 to 5% by weight of toluene, 1 to 5% by weight of xylene, 2.2 to 18.5% by weight of an additive consisting of 0.1 to 3% by weight of ethyl benzene is added, mixed, and applied evenly using a roller.

Subsequently, the waterproofing layer 30 forming step (S 3) is performed on the adhesive layer 20 by applying 100 parts by weight of a coating waterproofing material consisting of 15% by weight of natural asphalt, 65% by weight of straight asphalt, and 20% by weight of synthetic resin, 70% by weight of fine aggregate, and reinforcing fiber. A waterproofing layer (30) is formed by laying a film waterproofing material consisting of 100 parts by weight of a fine aggregate binder consisting of 1% by weight and 29% by weight of cement.

Here, the film waterproofing material used to form the waterproof layer 30 is loaded on a dedicated truck with an indirect heating melter and transported to the site, and then the film waterproofing material is melted with an indirect heating melter, then discharged and repeatedly laid on the base layer. do.

At this time, the application temperature of the film waterproofing material using the indirect heating melter is 160 to 210 ℃, and after melting to a maximum of 250 ℃, it is discharged and uniformly applied on the adhesive layer.

Next, in the protective layer forming step (S 4), a double-sided silica sand sheet or a single tying line made of a plurality of warp threads is formed on the waterproofing layer 30, and at least one tying line is arranged horizontally and vertically at regular intervals. It is composed of horizontal and vertical lines arranged to form a certain distance from the formed intersection point, and is composed of a fixing line located at each end of the bundle rope made of the horizontal or vertical lines and weaving and fixing the horizontal or vertical lines located at the intersection point. When the intersection point is fixed by the fixing line, it is located at both ends of either the horizontal line or the vertical line, and wraps around each of the tie lines formed in the corresponding horizontal line or vertical line and crosses each other when moved to the neighboring horizontal line or vertical line. The glass fiber grid 42, which is formed by weaving in the direction in which it is woven, and has the non-woven fabric 44 attached to one surface, is turned over and constructed with the non-woven fabric facing the packaging layer.

Here, in the present invention, the protective layer is illustratively described as being constructed using a glass fiber grid 42, but it should be noted that it may be alternatively constructed with double-sided silica sand if necessary.

Next, in the pavement layer forming step (S 5), asphalt, a pavement material, is laid at a temperature of 150°C or higher.

Figure 6 is a process diagram showing the process of constructing end paving of an asphalt protective wall on a bridge using a waterproofing film and a protective material according to the present invention.

As shown in these drawings, the bridge asphalt protective wall end paving construction method using the coating waterproofing material and the protective material according to the present invention is performed by forming the waterproof layer 30 during the bridge asphalt main cross-section paving construction step described above, and then paving the edge of the superstructure 10. After installing a perforated drain pipe (70) between the perforated drain pipe (70) and the protective wall (60), and installing molded joints (80) on the perforated drain pipe (70) as necessary, a coating film is applied to the gap between the perforated drain pipe (70) and the protective wall (60). The ends are treated by filling the waterproofing material seal.

The preferred embodiments described in the specification of the present invention are illustrative and not limiting, and the scope of the present invention is indicated by the appended claims, and all modifications within the meaning of the claims are included in the present invention. It will happen.

10: superstructure 12: base layer
20: adhesive layer 30: waterproof layer
40: protective layer 42: glass fiber grid
44: non-woven fabric 50: packaging layer
60: protective wall 70: perforated drain pipe
80: Molded joint
P: Bridge surface asphalt pavement

Claims (8)

delete delete delete delete delete An adhesive layer (20) in which a primer is applied to a certain thickness on the surface of the bridge superstructure (10); A waterproofing layer (30) in which a film waterproofing material is laid at a certain thickness on the adhesive layer (20); A protective layer (40) in which a glass fiber grid or a double-sided silica sand sheet is laid on the waterproof layer (30); A method of replacing and constructing old asphalt pavement using bridge surface asphalt pavement using a coating waterproofing material and a protective material consisting of a pavement layer (50) in which asphalt is laid to a certain thickness on the protective layer (40),
Step (S 1) of removing the asphalt pavement on the bridge superstructure 10 to a certain thickness and preparing the base surface to form the base layer 12;
Forming an adhesive layer 20 by applying a primer consisting of 60 to 65% by weight of oxidized asphalt and 35 to 40% by weight of hydrodesulfurized naphtha on the surface of the base layer 12 (S 2);
On the adhesive layer 20, 100 parts by weight of a coating waterproofing material consisting of 15% by weight of natural asphalt, 65% by weight of straight asphalt, and 20% by weight of synthetic resin, 70% by weight of fine aggregate, 1% by weight of reinforcing fiber, and 29% by weight of cement are fine aggregate binders 100. Step (S3) of forming a waterproof layer 30 by laying a coating waterproofing material or a double-sided silica sand sheet made of weight parts;
A horizontal line formed on the waterproof layer 30 by a single bundle made of a plurality of warp yarns, and arranged so as to form a certain distance from an intersection point formed by arranging at least one bundle of the bundles horizontally and vertically at regular intervals, and It is composed of a vertical line, and is composed of a fixing line that is located at each end of the horizontal line or a tie line made of vertical lines and weaves and secures the horizontal or vertical lines located at the intersection point, and the fixation of the intersection point by the fixed line is done by the horizontal line. Or, when located at both ends of one of the vertical rows, it is formed by weaving in a direction that crosses each other when moving to a neighboring horizontal row or vertical row while wrapping each of the bundled rows formed in the corresponding horizontal row or vertical row, and a non-woven fabric is formed on one surface. Forming a protective layer 40 by laying a glass fiber grid or a double-sided silica sand sheet (S 4);
A bridge asphalt pavement construction method using a coating waterproofing material and a protective material, comprising the step (S 5) of forming a pavement layer (50) by laying asphalt to a certain thickness on the protective layer (40). delete According to clause 6,
A bridge asphalt pavement construction method using a coating waterproofing material and a protective material, characterized in that after forming a waterproof layer by applying the coating waterproofing material, a perforated drain pipe is installed between the edge of the superstructure and the protective wall.

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