KR102644460B1 - Functional waterproofing material composition for composite waterproofing of newly established and repaired asphalt bridge surfaces and construction method for composite waterproofing of newly established and repaired asphalt bridge surfaces using the same - Google Patents

Abstract

The present invention includes 50 to 80% by weight of asphalt, 10 to 30% by weight of functional filler, 5 to 20% by weight of functional admixture, 1 to 10% by weight of tackifier, and 1 to 10% by weight of plasticizer; The functional filler contains 100 parts by weight of calcium carbonate, 50 to 100 parts by weight of silicon oxide, 1 to 10 parts by weight of aluminum-based hollow particles, 1 to 10 parts by weight of cordierite, and 0.1 to 5 parts by weight of hydromagnesite; The functional admixture includes 100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-dicyclopentadiene, and 1 to 10 parts by weight of cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol. , 1 to 10 parts by weight of Welan gum, 1 to 10 parts by weight of a ketoenol tautomeric compound, and 1 to 10 parts by weight of macelignan of Formula 1; The ketoenol tautomeric compound is one or more selected from the group consisting of octyl acetoacetate, oleyl acetoacetate, lauryl acetoacetate, stearyl acetoacetate, acetylacetone, 2,4-hexanedione, and benzoylacetone. ,
New construction and repairs can form a composite waterproofing layer of uniform thickness on the base of the bridge deck, have excellent adhesion and tensile performance with the base of the bridge deck, and can improve waterproofing performance through safe construction in a short period of time. It relates to a highly functional asphalt-based waterproofing composition for composite waterproofing of asphalt bridge surfaces and a composite waterproofing construction method for new and repaired asphalt bridge surfaces using the same.

Description

Functional waterproofing material composition for composite waterproofing of newly established and repaired asphalt bridge surfaces and construction method for composite waterproofing of newly established and repaired asphalt bridge surfaces and construction method for composite waterproofing of newly established and repaired asphalt bridge surfaces repaired asphalt bridge surfaces using the same}

The present invention can form a composite waterproof layer of uniform thickness on the base surface of the bridge deck, has excellent adhesion and tensile performance with the base surface of the bridge deck, and can improve waterproofing performance through safe construction in a short time, Crack tracking due to contraction/expansion due to external temperature changes is improved, and especially the rupture and rising phenomenon of the waterproof layer at high temperatures can be improved. It has excellent durability against chloride, alkali, and water, preventing cracking, lifting, peeling, or rupture. It relates to a functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridges that can effectively prevent construction and a composite waterproofing construction method for new and repaired asphalt bridges using the same.

In general, when rainwater or groundwater infiltrates the bridge surface, the bonding strength of the concrete material is reduced, pore cracks are generated due to water volume changes due to temperature changes, and the cracks expand over time to damage the structure forming the bridge surface. This results in a decrease in strength and lifespan. In addition, as a vehicle passes, the deck is bent and vibrates due to its own load and impact, causing microcracks to occur in the pavement layer and causing separation between the bridge surface and the pavement layer. Rainwater or condensation water, etc., causes the bridge deck to bend. It can penetrate into the upper plate, promote cracking, and corrode the structure or the reinforcing bars that form the structure, resulting in a shortened lifespan and the risk of collapse.

Therefore, a waterproofing material with physical properties that can completely waterproof the bridge surface, absorb loads and shocks, and suppress the spread of cracks is required.

Currently, waterproofing materials used as bridge waterproofing materials in Korea are divided into 3-layer and 8-layer asphalt waterproofing (blown asphalt), rubber-based waterproofing, sheet-type waterproofing, and silicate-alkali-based liquid waterproofing (penetrating waterproofing).

Solid blown asphalt obtained during the refining process of crude oil was used for its excellent waterproofing effect due to the thick waterproof layer through multi-layer construction. However, the process is complicated, the construction cost is high, and the adhesive strength at room temperature and flexibility at low temperature are weak, causing cracks in the bridge structure. It is a waterproof material that is difficult to use these days because it is vulnerable to damage, it is difficult to detect defective parts when a defect occurs, and the environmental pollution problem caused by the odor generated when heating blown asphalt compound is serious.

The sheet waterproofing material has the disadvantages of a lack of watertightness when joined by heat fusion using a torch at the sheet joint, a change in the physical properties of the waterproofing material due to direct heating by the torch, and a lifting phenomenon occurring due to a lack of adhesion to the surface of the structure. .

The rubber-based waterproofing material is a coating waterproofing material that forms a certain thickness by applying a coating film to the base surface of the structure several times. It has the advantage of forming a continuous coating waterproofing layer without any joints. However, due to poor heat resistance, when applying a waterproofing material at high temperatures, pinholes may occur or the waterproofing layer may rupture due to swelling, making it difficult to form a uniform waterproofing film. In addition, when constructing the pavement layer after forming the waterproof layer, damage to the waterproof layer may occur due to the pavement layer and packaging equipment.

The penetrating waterproofing material (silicate alkaline liquid waterproofing material) has excellent ease of construction and economic efficiency, but has poor crack tracking properties due to microcracks in the concrete top plate and has difficulty penetrating into the concrete base.

Accordingly, a composite waterproofing method combining film-type waterproofing construction and sheet-type waterproofing construction using conventional rubber-based waterproofing materials has been developed and is being applied in the field. In such composite waterproofing construction, there is a problem of separation between layers and fracture of joints between sheets due to lack of flexibility due to the lack of interlayer integrity between the two materials caused by the use of different materials between the coating material and the sheets. In addition, there is a problem of water leakage due to cracks or breaks in the coating film at the joint as the coating film and sheet repeat different contraction and expansion behaviors depending on the outside temperature. In addition, when the vehicle's load is applied repeatedly while the temperature rises, or when an intensive braking load due to sudden braking of the vehicle is applied, the tensile strength of the waterproof layer is weak and breaks, and it rises as it is pushed in the opposite direction of the braking load. The problem of rising prices still remains.

Republic of Korea Patent No. 10-0856975 Republic of Korea Patent No. 10-1256108 Republic of Korea Patent No. 10-0797088

The present invention was devised to solve the above-mentioned problems, and one embodiment of the present invention is to integrate the adhesion with the base surface of the bridge deck, and to reduce the interlayer gap due to the use of different dissimilar materials between the coating material and the sheet. Separation phenomenon and rupture of joints, problems of deterioration of waterproof performance due to cracking or rupture of the coating film at joints as the coating film and sheet repeat different contraction and expansion behavior depending on the external temperature, and repeated use of the vehicle while the temperature rises to a high level. The purpose is to provide a functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridges that can solve the problems of fracture and rising of the waterproof layer due to the load and intensive braking load, and a composite waterproofing construction method for new and repaired asphalt bridges using the same.

The various problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

One embodiment of the present invention includes 50 to 80% by weight of asphalt, 10 to 30% by weight of functional filler, 5 to 20% by weight of functional admixture, 1 to 10% by weight of tackifier, and 1 to 10% by weight of plasticizer;

The functional filler contains 100 parts by weight of calcium carbonate, 50 to 100 parts by weight of silicon oxide, 1 to 10 parts by weight of aluminum-based hollow particles, 1 to 10 parts by weight of cordierite, and 0.1 to 5 parts by weight of hydromagnesite;

The functional admixture includes 100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-dicyclopentadiene, and 1 to 10 parts by weight of cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol. , 1 to 10 parts by weight of Welan gum, 1 to 10 parts by weight of a ketoenol tautomeric compound, and 1 to 10 parts by weight of macelignan of the following formula (1);

The ketoenol tautomer compound is a new invention wherein the ketoenol tautomeric compound is at least one selected from the group consisting of octyl acetoacetate, oleyl acetoacetate, lauryl acetoacetate, stearyl acetoacetate, acetylacetone, 2,4-hexanedione, and benzoylacetone. and a functional waterproofing composition for composite waterproofing of repaired asphalt bridge surfaces.

[Formula 1]

The aluminum-based hollow particles are prepared by adding a mixture of aluminum salt and calcium salt in distilled water at a weight ratio of 1:0.5 to 1 to prepare a first solution; Preparing a second solution by mixing 50 to 100 parts by weight of silicic acid alkoxide with 100 parts by weight (based on solid content) of the first solution and then adjusting the pH to 1 to 3; And spraying the second solution in a spray pyrolysis furnace at 700 to 1200°C and performing primary calcination, followed by secondary calcination at 500 to 800°C to produce aluminum-based hollow particles. there is.

The aluminum-based hollow particles are surface-modified aluminum-based hollow particles,

The surface-modified aluminum-based hollow particles include preparing surface-modified aluminum-based hollow particles by stirring 100 parts by weight of the aluminum-based hollow particles, 10 to 30 parts by weight of sodium octyl sulfate, and 1 to 10 parts by weight of dicaffeoylquinic acid; It is manufactured by a method further comprising,

The decaffeoylquinic acid is selected from the group consisting of 1,5-dicaffeoylquinic acid, 3,4-decaffeoylquinic acid, 3,5-dicaffeoylquinic acid and 4,5-dicaffeoylquinic acid. There may be more than one type.

The functional admixture further contains 1 to 10 parts by weight of an N-vinyl lactam compound based on 100 parts by weight of the styrene-butadiene rubber (SBR);

The N-vinyl lactam compounds include N-vinyl-β-propiolactam, N-vinyl-2-pyrrolidone, N-vinyl-γ-valerolactam, N-vinyl-2-piperidone and N-vinyl- It may be one or more types selected from the group consisting of hepto lactams.

Meanwhile, another embodiment of the present invention is a composite waterproofing construction method for a bridge surface using the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces,

After cutting the pavement of the bridge surface to be constructed, removing foreign substances and cutting the protruding portions to keep them flat, thereby organizing the base surface 100; Applying a functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces to form an asphalt coating waterproof layer (200); Forming an asphalt sheet layer (300) by attaching and constructing an asphalt sheet containing a functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces; And after pouring asphalt concrete, compacting and curing it to form an asphalt pavement layer (400). It provides a composite waterproofing construction method for a bridge including a step.

The asphalt sheet is made by impregnating a central reinforcement material (302) composed of polyester long fiber or short fiber nonwoven fabric into the functional waterproofing composition (301, 301') for composite waterproofing of new and repaired asphalt bridges, and then impregnating the asphalt sheet. It may be finished by attaching silica sand 303 to the top, bottom, or both sides.

According to the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces according to an embodiment of the present invention and the composite waterproofing construction method for new and repaired asphalt bridge surfaces using the same, a composite waterproof layer of uniform thickness can be formed on the base surface of the bridge deck. It has excellent adhesion performance and tensile performance with the base surface of the bridge deck, and can improve waterproofing performance through safe construction in a short time. In addition, crack followability due to contraction/expansion due to external temperature changes is improved, and in particular, the rupture and rising phenomenon of the waterproof layer at high temperatures can be improved, and the durability against chloride, alkali, and water is excellent, preventing cracking, lifting, peeling, or fracture. It has the effect of effectively preventing the phenomenon.

Figure 1 shows a construction flow chart of a composite waterproofing construction method for new and repaired asphalt bridges according to an embodiment of the present invention.
Figure 2 shows a schematic construction cross-sectional view constructed according to the composite waterproofing construction method for new and repaired asphalt bridges according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

One embodiment of the present invention includes 50 to 80% by weight of asphalt, 10 to 30% by weight of functional filler, 5 to 20% by weight of functional admixture, 1 to 10% by weight of tackifier, and 1 to 10% by weight of plasticizer;

The functional filler contains 100 parts by weight of calcium carbonate, 50 to 100 parts by weight of silicon oxide, 1 to 10 parts by weight of aluminum-based hollow particles, 1 to 10 parts by weight of cordierite, and 0.1 to 5 parts by weight of hydromagnesite;

The functional admixture includes 100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-dicyclopentadiene, and 1 to 10 parts by weight of cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol. , 1 to 10 parts by weight of Welan gum, 1 to 10 parts by weight of a ketoenol tautomeric compound, and 1 to 10 parts by weight of macelignan of the following formula (1);

The ketoenol tautomer compound is a new invention wherein the ketoenol tautomeric compound is at least one selected from the group consisting of octyl acetoacetate, oleyl acetoacetate, lauryl acetoacetate, stearyl acetoacetate, acetylacetone, 2,4-hexanedione, and benzoylacetone. and a functional waterproofing composition for composite waterproofing of repaired asphalt bridge surfaces.

[Formula 1]

According to the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces according to an embodiment of the present invention and the composite waterproofing construction method for new and repaired asphalt bridge surfaces using the same, a composite waterproof layer of uniform thickness is formed on the base surface of the bridge deck. It has excellent adhesion performance and tensile performance with the base surface of the bridge deck, and can improve waterproofing performance through safe construction in a short time. In addition, crack followability due to contraction/expansion due to external temperature changes is improved, and in particular, the rupture and rising phenomenon of the waterproof layer at high temperatures can be improved, and the durability against chloride, alkali, and water is excellent, preventing cracking, lifting, peeling, or fracture. It has the effect of effectively preventing the phenomenon.

More specifically, the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridges according to an embodiment of the present invention includes 50 to 80% by weight of asphalt, 10 to 30% by weight of functional filler, 5 to 20% by weight of functional admixture, and tackifier. 1 to 10% by weight and 1 to 10% by weight of plasticizer.

First, the asphalt implements excellent tensile performance, adhesion performance, waterproofing performance, and response to cracks, improves fluidity, and provides excellent work performance.

The asphalt may be one or more selected from the group consisting of straight asphalt, blown asphalt, cutback asphalt, and mixtures thereof. More preferably, a mixture of straight asphalt and blown asphalt at a weight ratio of 5 to 10:1 is used, and is used simultaneously for waterproofing asphalt coatings and asphalt sheets, further improving the above-mentioned improvement effect. In particular, workability is greatly improved, and crack followability due to contraction/expansion due to external temperature changes is greatly improved.

The asphalt may be included in the range of 50 to 80% by weight in the functional waterproofing composition for composite waterproofing of new and repaired asphalt bridges of the present invention. If the content of asphalt is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of asphalt is too high, adhesion performance may decrease and hardness may increase excessively, resulting in decreased resistance to cracking. There is a problem.

Meanwhile, the functional filler fills pores to form a stable coating film of uniform thickness, improves compressive strength, dent resistance, hardness and abrasion resistance, and has excellent alkali resistance, chloride ion penetration resistance, water resistance and impermeability. It functions to provide durability such as heat resistance and fatigue resistance.

The functional filler may be included in the range of 10 to 30% by weight in the functional waterproofing composition for composite waterproofing of new and repaired asphalt bridges of the present invention. If the content of the functional filler is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the functional filler is too high, the waterproofness and workability may decrease, or the manufacturing cost may increase, which may reduce price competitiveness. There is a problem.

More specifically, the functional filler contains 100 parts by weight of calcium carbonate, 50 to 100 parts by weight of silicon oxide, 1 to 10 parts by weight of aluminum-based hollow particles, 1 to 10 parts by weight of cordierite, and 0.1 to 5 parts by weight of hydromagnesite. can be used preferably.

First, the calcium carbonate fills pores to form a stable coating film of uniform thickness, improves compressive strength and dent resistance, and provides excellent alkali resistance and chloride ion penetration resistance.

Hereinafter, the content of other components constituting the functional filler is based on 100 parts by weight of the calcium carbonate.

The silicon oxide fills pores to form a stable coating film of uniform thickness, improves compressive strength, dent resistance, hardness, and abrasion resistance, and provides excellent water resistance, impermeability, chemical resistance, and heat resistance durability. It functions. In addition, it improves long-term durability by suppressing aging and improves the fatigue resistance of the composition by increasing viscosity.

The silicon oxide is preferably contained in the range of 50 to 100 parts by weight based on 100 parts by weight of the calcium carbonate. If the content of the silicon oxide is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of the silicon oxide is too high, no further improvement effect can be expected, and the waterproof performance may actually deteriorate. There is a problem.

The aluminum-based hollow particles improve compressive strength, dent resistance, hardness, and wear resistance, provide excellent alkali resistance, chloride ion penetration resistance, water resistance, heat resistance, and fatigue resistance, and prevent peeling. It functions to inhibit aging and improve long-term durability.

These aluminum-based hollow particles can be used as commercially available products, for example, hollow alumina particles from Harim Trading Co., Ltd., hollow alumina balls from SHANDONG TAIRAN, etc.

In addition, the aluminum-based hollow particles produced by the following method have the effect of further improving the above-described improvement effects.

More specifically, preparing a first solution by adding a mixture of aluminum salt and calcium salt in distilled water at a weight ratio of 1:0.5 to 1; Preparing a second solution by mixing 50 to 100 parts by weight of silicic acid alkoxide with 100 parts by weight (based on solid content) of the first solution and then adjusting the pH to 1 to 3; and spraying the second solution in a spray pyrolysis furnace at 700 to 1200°C and performing primary calcination, followed by secondary calcination at 500 to 800°C to produce aluminum-based hollow particles. It can be used easily.

The aluminum salt may be one or more selected from the group consisting of aluminum acetate, aluminum sulfate, aluminum chloride, aluminum phosphate, aluminum hydroxide, aluminum acetate, and aluminum oxalate. The calcium salt may be one or more selected from the group consisting of calcium nitrate, calcium chloride, calcium hydroxide, calcium formate, calcium acetate, and calcium propionate. Additionally, the aqueous silicate alkoxide solution may be one or more selected from the group consisting of tetramethyl ortho silicate (TMOS), tetraethyl ortho silicate (TEOS), tetrapropyl ortho silicate (TPOS), and tetrabutoxysilane.

At this time, the first and second firings can be performed sequentially to produce aluminum-based hollow particles with excellent durability while maintaining a uniform size of the hollow particles.

In addition, the aluminum-based hollow particles are surface-modified aluminum-based hollow particles, which not only further improves the above-described improvement effects, but also improves adhesion and shear adhesion performance and further improves peeling prevention properties.

More specifically, the surface-modified aluminum-based hollow particles are prepared by stirring 100 parts by weight of the aluminum-based hollow particles, 10 to 30 parts by weight of sodium octyl sulfate, and 1 to 10 parts by weight of dicaffeoylquinic acid. It can be preferably used if it is manufactured by a method that further includes a manufacturing step.

The octyl sulfate functions to facilitate mixing of aluminum-based hollow particles and functional admixtures to increase compatibility, thereby causing the functional waterproofing composition according to the present invention to exhibit uniform physical properties and characteristics. This sodium octyl sulfate is commonly used in the art, and products such as Wako Pure Chemical Industries, Ltd. or A11786 from Alfa Aesar can be used.

The decaffeoylquinic acid functions to realize excellent waterproofing function by forming a waterproof coating film with excellent water resistance, chloride ion penetration resistance, durability against alkali and acid, and weather resistance. In particular, since it is impregnated inside or applied to the surface of the aluminum-based hollow particles, the functional waterproofing material composition according to the present invention functions to effectively express the above functions.

This decaffeoylquinic acid is selected from the group consisting of 1,5-dicaffeoylquinic acid, 3,4-dicaffeoylquinic acid, 3,5-dicaffeoylquinic acid and 4,5-dicaffeoylquinic acid. There may be more than one type.

The cordierite fills pores to form a stable coating film of uniform thickness, improves compressive strength, tensile strength, dent resistance, hardness, and abrasion resistance, and has excellent alkali resistance, chloride ion penetration resistance, and heat resistance. , functions to provide durability such as fatigue resistance, peeling prevention, and anti-aging.

This cordierite has the effect of further improving the above effect by using silylated cordierite. More specifically, 100 parts by weight of purified water, 90 to 120 parts by weight of a triethoxysilane-based compound, N,N'-hexamethylene-bis-3-(3,5-di-tert-butyl-4-hydroxyphenol) - It can be prepared by mixing 50 to 100 parts by weight of propionamide and cordierite at 20 to 30 ° C.

The triethoxysilane-based compounds are those commonly used in the art and are not particularly limited, but for example, 3-aminopropyltriethoxysilane and N-(N-butyl)-3-aminopropyltriethoxysilane are used in 1 : It is preferable to mix and use at a weight ratio of 1. The N,N'-hexamethylene-bis-3-(3,5-di-tert-butyl-4-hydroxyphenol)-propionamide functions to improve stability against heat and light.

The cordierite is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the calcium carbonate. If the content of the cordierite is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the cordierite is too high, no further improvement effect can be expected, which may reduce price competitiveness. There is a problem.

The hydromagnesite functions to provide excellent alkali resistance, chloride ion penetration resistance, water resistance, heat resistance, fatigue resistance, anti-stripping, and anti-aging durability.

The hydromagnesite is preferably contained in the range of 0.1 to 5 parts by weight based on 100 parts by weight of the calcium carbonate. If the content of the hydromagnesite is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the hydromagnesite is too high, the strength performance deteriorates, or no further improvement effect can be expected, making the product price competitive. There is a problem that may cause this to deteriorate.

Meanwhile, the functional admixture improves workability by improving compatibility with asphalt, realizes excellent waterproofing performance, tensile performance and shear adhesion performance, and increases elastic strength to improve impact resistance performance, crack resistance, plastic deformation resistance, It not only improves bending stability, improves thermal stability and low-temperature characteristics, but also provides excellent alkali resistance, chloride ion penetration resistance, water resistance, impermeability, heat resistance and fatigue resistance.

The functional admixture may be included in the range of 5 to 20% by weight in the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridges of the present invention. If the content of the functional admixture is too small, the improvement effect may be insufficient, and if the content of the functional admixture is too high, dent resistance, hardness, and wear resistance may be reduced.

More specifically, the functional admixture is 100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-dicyclopentadiene, and 1 part by weight of cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol. to 10 parts by weight, 1 to 10 parts by weight of Welan gum, 1 to 10 parts by weight of a ketoenol tautomer compound, and 1 to 10 parts by weight of macelignan of the following formula (1). there is.

First, the styrene-butadiene rubber (SBR) realizes excellent waterproofing performance, tensile performance, and shear adhesion performance, and increases elastic strength to improve impact resistance performance, crack resistance, plastic deformation resistance, and bending stability, and thermal stability. , has the function of improving low-temperature characteristics.

Hereinafter, the content of other components constituting the functional admixture is based on 100 parts by weight of the styrene-butadiene rubber (SBR).

The ethylene-propylene-dicyclopentadiene improves workability by improving compatibility with asphalt, realizes excellent waterproofing performance and shear adhesion performance, and increases elastic strength to improve impact resistance performance, crack resistance, and plastic deformation resistance. , it improves the bending properties, and also provides excellent alkali resistance, chloride ion penetration resistance, water resistance, impermeability, and fatigue resistance.

The ethylene-propylene-dicyclopentadiene is preferably contained in the range of 50 to 80 parts by weight based on 100 parts by weight of the styrene-butadiene rubber (SBR). If the content of ethylene-propylene-dicyclopentadiene is too small, there is a problem that the improvement effect may be insufficient, and if the content of ethylene-propylene-dicyclopentadiene is too high, strength performance actually decreases. There is a problem that can arise.

The cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol realizes excellent waterproofing performance, tensile performance, and shear adhesion performance, and increases elastic strength to improve impact resistance performance, crack resistance, plastic deformation resistance, and bending estimation. It not only improves thermal stability and low-temperature characteristics, but also provides excellent fatigue resistance, anti-separation, and anti-aging durability.

This cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol is a diester of dicarboxylic acid and polyoxyethylene monoalkyl ether, and the dicarboxylic acid is 1,4-cyclohexane dicarboxylic acid. Polyoxyethylene monoalkyl ether is diethylene glycol monoethyl ether. At this time, the cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol can be used as a commercial product, for example, Neosolue-Aqulio product from Japan Fine Chemical Co., Ltd.

The cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the styrene-butadiene rubber (SBR). If the content of the cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol is too small, there is a problem that the above-described improvement effect may be insufficient, and the cyclohexane-1,4-dicarboxylic acid bis If the content of ethoxydiglycol is too high, there is a problem that compatibility may decrease and material separation may occur.

The Welan gum improves workability by improving compatibility with asphalt, and provides excellent waterproofing performance, tensile performance, shear adhesion performance, water resistance, and impermeability.

The Welan gum is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the styrene-butadiene rubber (SBR). If the content of the wellan gum is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the wellan gum is too high, there is a problem that the fatigue performance may be reduced.

The ketoenol tautomer compound functions to improve durability such as excellent heat stability, shear bond strain rate, chemical resistance, and chloride ion penetration resistance.

These ketoenol tautomeric compounds may be one or more selected from the group consisting of octyl acetoacetate, oleyl acetoacetate, lauryl acetoacetate, stearyl acetoacetate, acetylacetone, 2,4-hexanedione, and benzoylacetone. Considering not only the above-mentioned improvement effect but also the improvement of waterproof performance, it is preferable to use a mixture of stearyl acetoacetate and benzoylacetone at a weight ratio of 1:0.1 to 1.

The ketoenol tautomeric compound is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the styrene-butadiene rubber (SBR). If the content of the keto-enol tautomer compound is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of the keto-enol tautomer compound is too high, the strength performance may be reduced. There is.

Macelignan of Formula 1 improves crack resistance, plastic deformation resistance, bending stability, thermal stability, and low-temperature characteristics, and has excellent alkali resistance, chloride ion penetration resistance, water resistance, impermeability, heat resistance, and fatigue resistance. It provides functions.

The macelignan of Formula 1 is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the styrene-butadiene rubber (SBR). If the content of macelignan of Formula 1 is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of macelignan of Formula 1 is too high, there is a problem that strength performance may be reduced. .

In addition, the functional admixture may additionally contain 1 to 10 parts by weight of an N-vinyl lactam compound. The N-vinyl lactam compound improves workability by improving compatibility with asphalt, and provides excellent alkali resistance, chloride ion penetration resistance, and fatigue resistance durability.

These N-vinyl lactam compounds include N-vinyl-β-propiolactam, N-vinyl-2-pyrrolidone, N-vinyl-γ-valerolactam, N-vinyl-2-piperidone, and N-vinyl-2-piperidone. -One or more types selected from the group consisting of hepto lactams can be used.

The N-vinyl lactam compound is preferably contained in the range of 0.1 to 5 parts by weight based on 100 parts by weight of the styrene-butadiene rubber (SBR). If the content of the N-vinyl lactam compound is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of the N-vinyl lactam compound is too high, there is a problem that strength performance may be reduced. .

On the other hand, the tackifier strengthens the bonding power between compositions and improves adhesion, so that it adheres well to any adhered surface such as concrete, steel, and asphalt pavement, preventing separation at low temperatures and slowing down the aging of asphalt. It functions to improve.

The tackifier is one selected from the group consisting of petroleum resins (C9-based, C5-based, C9-C5 copolymers), maleated petroleum resins, esterified petroleum resins, rosin esters, phenol resins, rosins, and mixtures thereof. More than one species can be preferably used.

The tackifier may be included in the functional waterproofing composition for composite waterproofing of new and repaired asphalt bridges of the present invention in the range of 1 to 10% by weight. If the content of the tackifier is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of the tackifier is too large, there is a problem that elasticity may decrease and low-temperature brittleness may occur.

Meanwhile, the plasticizer functions to improve the compatibility of the composition, improve workability by reducing viscosity, and assist in improving elasticity and flexibility.

The plasticizer may use one or more process oils selected from the group consisting of paraffin oil, naphthenic oil, aromatic oil, and mixtures thereof; 1 part by weight of the process oil may be mixed with 0.05 to 0.3 parts by weight of at least one plasticizer selected from the group consisting of glycol oil, mineral sprit oil, and mixtures thereof. there is.

The plasticizer may be included in the range of 1 to 10% by weight in the functional waterproofing composition for composite waterproofing of new and repaired asphalt bridges of the present invention. If the content of the plasticizer is too small, there is a problem that the above-mentioned improvement effect may be insufficient, and if the content of the plasticizer is too much, there is a problem that the viscosity may be too low and workability may be reduced.

Meanwhile, another embodiment of the present invention is a composite waterproofing construction method for new and repaired asphalt bridges using the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridges,

After cutting the pavement of the bridge surface to be constructed, removing foreign substances and cutting the protruding portions to keep them flat, thereby organizing the base surface 100; Applying a functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces to form an asphalt coating waterproof layer (200); Forming an asphalt sheet layer (300) by attaching and constructing an asphalt sheet containing a functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces; and pouring asphalt concrete, compacting and curing it to form an asphalt pavement layer (400).

More specifically, the bridge surface to be constructed is the base surface of the bridge deck and can be applied to both concrete decks and steel decks.

In addition, the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces of the present invention can achieve sufficient adhesion to the base surface, so the application of primer can be omitted, but it has a better adhesion improvement effect and integration effect to the base surface. In order to implement, the step of applying a general primer commonly used in the art may be further included.

That is, the composite waterproofing construction method for new and repaired asphalt bridges may further include the step of applying a primer to form a primer layer. As a result, it is possible to achieve better strength reinforcement effects, prevention of moisture build-up, and adhesion strengthening effects. These primers are commonly used in the art and are not particularly limited in type.

In addition, the step of applying the functional waterproofing material composition for composite waterproofing of the new and repaired asphalt bridge surfaces to form an asphalt film waterproofing layer (200); the functional waterproofing material composition for composite waterproofing of the new and repaired asphalt bridge surfaces is applied at a temperature range of 180 to 220 ° C. This can be done by heating and melting, completely mixing with each other, and then applying. In addition, the application may be applied multiple times in the range of 1 to 2 times until the asphalt waterproofing layer has a thickness of 1 to 2 mm.

In addition, the asphalt sheet is made by impregnating the central reinforcement 302, which includes polyester long fibers or short fiber non-woven fabric, with the high-performance asphalt-based waterproofing composition 301, 301' for composite waterproofing of new and repaired asphalt bridges. , It may be finished by attaching silica sand 303 to the top, bottom, or both sides of the asphalt sheet. The asphalt sheet may have a thickness of 2 to 3 mm.

At this time, the impregnation of the central reinforcement 302 may be performed by heating and melting the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridges at a temperature range of 180 to 220 ° C.

In addition, the type of silica sand is not particularly limited as it is commonly used in the art, but for non-limiting examples, No. 7 or No. 8 silica sand can be used.

A construction flow chart of the composite waterproofing construction method for new and repaired asphalt bridges according to an embodiment of the present invention and a schematic construction cross-sectional view constructed according to the composite waterproofing construction method for new and repaired asphalt bridges according to an embodiment of the present invention. They are shown in Figures 1 and 2, respectively.

According to the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces according to an embodiment of the present invention and the composite waterproofing construction method for new and repaired asphalt bridge surfaces using the same, a composite waterproof layer of uniform thickness can be formed on the base surface of the bridge deck. It has excellent adhesion performance and tensile performance with the base surface of the bridge deck, and can improve waterproofing performance through safe construction in a short time. In addition, crack followability due to contraction/expansion due to external temperature changes is improved, and in particular, the rupture and rising phenomenon of the waterproof layer at high temperatures can be improved, and the durability against chloride, alkali, and water is excellent, preventing cracking, lifting, peeling, or fracture. It has the effect of effectively preventing the phenomenon.

Above, the present invention has been described in detail with preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. This is possible.

<Production Example 1> Aluminum-based hollow particles

A first solution was prepared by mixing a mixture of aluminum acetate (Hayashi Pure Chemical Industries, Ltd.) and calcium nitrate (Hayashi Pure Chemical Industries, Ltd.) in a weight ratio of 1:0.6 with distilled water to have a concentration of 0.3 mol/L. Afterwards, 50 parts by weight of tetraethyl ortho silicate (Tokyo Chemical Industry Co., Ltd.) was mixed with 100 parts by weight of the first solution (based on solid content), and then the pH was adjusted to 2 with hydrochloric acid to prepare a second solution. . Thereafter, the second solution was sprayed in a spray pyrolysis furnace at 1000°C and first fired, and then secondarily fired at 600°C to produce aluminum-based hollow particles.

<Preparation Example 2> Surface-modified aluminum-based hollow particles

Preparation Example 1 was carried out in the same manner as above, except that 100 parts by weight of the aluminum-based hollow particles, 25 parts by weight of sodium octyl sulfate (A11786 product, Wako Pure Chemical Industries, Ltd.), and 4 parts by weight of 1,5-dicaffeoylquinic acid were mixed for 15 hours. Surface-modified aluminum-based hollow particles were prepared by stirring for a while.

<Preparation Example 3> Silylated cordierite

A hydrate was prepared by adding and stirring 50 parts by weight of 3-aminopropyltriethoxysilane and 50 parts by weight of N-(N-butyl)-3-aminopropyltriethoxysilane to 100 parts by weight of purified water and stirring. Afterwards, 70 parts by weight of cordierite was added to the hydrate, stirred and reacted at room temperature for about 2 hours, and then filtered and washed to prepare silylated cordierite.

<Examples and Comparative Examples>

Examples 1 to 3 and Comparative Examples 1 to 2: Preparation of a functional waterproofing composition for composite waterproofing of new and repaired asphalt bridge surfaces

A functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridges and a comparative composition were prepared by mixing the ingredients and content conditions as shown in Table 1 below.

Classification (weight%) Example 1 Example 2 Example 3 Comparative Example 1 Comparative example 2 5 types of straight asphalt 51 55 55 61 50 blown asphalt 10 6 6 - 11 Functional filler 17 17 17 17 17 weight part calcium carbonate 100 100 100 100 100 silicon oxide 80 80 80 40 80 Aluminum hollow particles 7 7
[Production Example 1] 7
[Production Example 2] - - cordier light 5 5
[Production Example 3] 5
[Production Example 3] - - Hydromagnesite 2 2 2 - - Functional admixture 12 12 12 12 12 weight part Styrene-butadiene rubber (SBR) 100 100 100 100 100 Ethylene-propylene-dicyclopentadiene 60 60 60 - 40 Cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol 7 7 7 - - Welan gum 4 4 4 - - Ketoenol tautomeric compounds Stearyl acetoacetate 3 1.5 2 - - Benzoylacetone - 1.5 One - - Mace lignan of formula 1 3 3 3 - - N-vinyl lactam compounds N-Vinyl-βpropiolactam - One One - - N-vinyl-2-piperidone - One One - - Tackifier [C5-based petroleum resin] 7 7 7 7 7 Plasticizer [Paraffin Oil] 3 3 2.5 3 3 Plasticizer [Glycol Oil] - - 0.5 - - Aluminum-based hollow particles: SHANDONG TAIRAN's hollow alumina balls
Ethylene-propylene-dicyclopentadiene: product from Lion Elastmer.
Formula 1:

Examples 4 to 6 and Comparative Examples 3 to 4: Preparation of asphalt sheets

As shown in Figure 3, the central reinforcement material composed of polyester long fiber nonwoven fabric was prepared in the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces according to Examples 1 to 3, respectively, and in Comparative Examples 1 and 2. An asphalt sheet was manufactured by impregnating the composition for comparison according to the composition and finishing it by attaching No. 7 silica sand to both sides.

The test examples below show experimental results comparing the characteristics of the examples according to the present invention and the comparative examples so that the characteristics of the examples according to the present invention disclosed above can be more easily understood.

<Test Example 1>

Regarding the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces according to Examples 1 to 3 and the comparative composition according to Comparative Examples 1 and 2, the quality standards for waterproofing materials for concrete bridge coatings (KS F 4932) A physical property test was conducted, and the results are shown in Table 2 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative example 2 Workability Good Good Good Good Good Non-volatility (%) 87 89 90 70 75 Seal
Performance tensile strength
(N/㎟) Untreated 2.0 2.0 2.2 1.2 1.5 Alkaline treatment 1.5 1.7 1.9 0.6 1.0 Heat treatment 1.8 1.8 2.0 0.5 0.9 elongation rate
(%) Untreated 103 104 106 90 96 Alkaline treatment 97 99 101 81 84 Heat treatment 98 99 102 84 85 shear
adhesion
Performance Shear bond strength
(N/㎟) -20℃ 1.3 1.6 1.4 0.5 0.7 20℃ 0.23 0.26 0.26 0.12 0.14 Shear adhesion
Strain rate (%) -20℃ 0.8 0.9 0.9 0.3 0.5 20℃ 1.2 1.2 1.3 0.6 0.9 tensile bond strength
(N/㎟) -20℃ 1.7 1.8 2.0 0.9 1.2 20℃ 0.9 1.2 1.3 0.3 0.6 Permeability resistance Not a pitcher
No Not a pitcher
No Not a pitcher
No Occurrence of pitching Not a pitcher
No Resistance to chloride ion penetration (coulombs) 84 80 75 173 120 Chemical resistance (10% sulfuric acid) clear clear clear Occurrence of heaviness Occurrence of heaviness Chemical resistance (10% HCl) clear clear clear Occurrence of heaviness Occurrence of heaviness Chemical resistance (10% caustic soda) clear clear clear clear clear inner dent clear clear clear Hole occurrence clear Heat resistance dimension
stability(%) 150℃30 minutes 0.5 0.4 0.5 2.7 1.4 Fatigue resistance clear clear clear Balance generation clear Crack resistance -20℃ clear clear clear Balance generation Balance generation low temperature flexibility -10℃ clear clear clear Cracks occur clear Tensile adhesion after 7 days of immersion 20℃ 0.8 1.0 1.0 0.2 0.4

As shown in Table 2, the functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridges according to Examples 1 to 3 of the present invention has excellent performance compared to the comparative compositions according to Comparative Examples 1 and 2. It was confirmed that .

<Test Example 2>

For the asphalt sheets according to Examples 4 to 6 and Comparative Examples 3 and 4, a physical property test was conducted according to the quality standards for waterproofing materials for concrete bridge sheets (KS F 4931), and the results are shown in Table 3 below. It was.

division Example 4 Example 5 Example 6 Comparative example 3 Comparative Example 4 Seal
Performance tensile strength
(N/㎟) Untreated 4.4 4.6 4.7 2.1 3.4 Alkaline treatment 4.1 4.2 4.4 1.6 2.9 Heat treatment 4.3 4.3 4.5 1.6 3.0 elongation rate
(%) Untreated 53 56 57 27 36 Alkaline treatment 46 46 48 17 31 Heat treatment 46 45 48 18 30 shear
adhesion
Performance Shear bond strength
(N/㎟) -10℃ 1.7 2.0 2.4 1.1 1.6 23℃ 0.5 0.6 0.8 0.2 0.3 Shear adhesion
Strain rate (%) -10℃ 0.6 0.7 0.7 0.3 0.3 23℃ 1.4 1.6 1.6 0.6 0.8 tensile bond strength
(N/㎟) -10℃ 2.5 2.6 2.8 1.2 1.8 23℃ 1.9 2.0 2.2 0.7 1.2 Permeability resistance Not a pitcher
No Not a pitcher
No Not a pitcher
No Not a pitcher
No Not a pitcher
No Resistance to chloride ion penetration (coulombs) 43 39 34 113 86 inner dent clear clear clear Hole occurrence clear Heat resistance dimension
stability(%) 150℃30 minutes 0.8 0.5 0.3 2.8 1.6 Fatigue resistance clear clear clear Balance generation clear Crack resistance -10℃ clear clear clear Balance generation Balance generation Fatigue crack test -10℃ clear clear clear Balance generation Balance generation low temperature flexibility -10℃ clear clear clear Cracks occur Cracks occur Tensile adhesion after 7 days of immersion 20℃ 1.5 1.7 1.9 0.3 0.6

As shown in Table 3, it was confirmed that the asphalt sheets according to Examples 4 to 6 of the present invention showed excellent performance compared to the asphalt sheets according to Comparative Examples 1 and 2.

As described above, a person skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, all embodiments described above should be understood as illustrative and not restrictive. The scope of the present invention should be construed as including all changes or modified forms derived from the meaning and scope of the claims described below and their equivalent concepts rather than the detailed description above.

100: Base surface
200: Asphalt coating waterproof layer
300: Asphalt sheet layer
301, 301': Functional waterproofing composition for composite waterproofing of new and repaired asphalt bridge surfaces
302: Center stiffener
303: Silica sand
400: Asphalt pavement layer

Claims (6)

Containing 50 to 80% by weight of asphalt, 10 to 30% by weight of functional filler, 5 to 20% by weight of functional admixture, 1 to 10% by weight of tackifier, and 1 to 10% by weight of plasticizer;
The functional filler is
Contains 100 parts by weight of calcium carbonate, 50 to 100 parts by weight of silicon oxide, 1 to 10 parts by weight of aluminum-based hollow particles, 1 to 10 parts by weight of cordierite, and 0.1 to 5 parts by weight of hydromagnesite;
The functional admixture is
100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-dicyclopentadiene, 1 to 10 parts by weight of cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol, wellan gum ( Contains 1 to 10 parts by weight of Welan gum, 1 to 10 parts by weight of a ketoenol tautomeric compound, and 1 to 10 parts by weight of macelignan of the following formula (1);
The ketoenol tautomeric compound is
A composite of new and repaired asphalt bridges comprising at least one selected from the group consisting of octyl acetoacetate, oleyl acetoacetate, lauryl acetoacetate, stearyl acetoacetate, acetylacetone, 2,4-hexanedione, and benzoylacetone. Functional waterproofing material composition for waterproofing.
[Formula 1]

According to paragraph 1,
The aluminum-based hollow particles are
Preparing a first solution by adding a mixture of aluminum salt and calcium salt in distilled water at a weight ratio of 1:0.5 to 1;
Mixing 50 to 100 parts by weight of silicic acid alkoxide with 100 parts by weight of the first solution (based on solid content) and then adjusting the pH to 1 to 3 to prepare a second solution; and
Spraying the second solution in a spray pyrolysis furnace at 700 to 1200°C and performing primary calcination, followed by secondary calcination at 500 to 800°C to produce aluminum-based hollow particles; characterized in that it is manufactured by a method comprising: A functional waterproofing composition for composite waterproofing of new and repaired asphalt bridge surfaces.
According to paragraph 2,
The aluminum-based hollow particles are
It is a surface-modified aluminum-based hollow particle,
The surface-modified aluminum-based hollow particles are
Preparing surface-modified aluminum-based hollow particles by stirring 100 parts by weight of the aluminum-based hollow particles, 10 to 30 parts by weight of sodium octyl sulfate, and 1 to 10 parts by weight of dicaffeoylquinic acid. and
The decaffeoylquinic acid is
Characterized by at least one selected from the group consisting of 1,5-dicaffeoylquinic acid, 3,4-dicaffeoylquinic acid, 3,5-dicaffeoylquinic acid and 4,5-dicaffeoylquinic acid. A functional waterproofing composition for composite waterproofing of new and repaired asphalt bridge surfaces.
According to paragraph 1,
The functional admixture is
Additionally containing 1 to 10 parts by weight of an N-vinyl lactam compound based on 100 parts by weight of the styrene-butadiene rubber (SBR);
The N-vinyl lactam compound is
selected from the group consisting of N-vinyl-β-propiolactam, N-vinyl-2-pyrrolidone, N-vinyl-γ-valerolactam, N-vinyl-2-piperidone and N-vinyl-heptolactam. A functional waterproofing composition for composite waterproofing of new and repaired asphalt bridge surfaces, characterized in that it contains one or more types.
A composite waterproofing construction method for a bridge surface using a functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces according to any one of claims 1 to 4, comprising:
After cutting the pavement of the bridge surface to be constructed, removing foreign substances and cutting the protruding portions to keep them flat, thereby organizing the base surface 100; Applying a functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces to form an asphalt coating waterproof layer (200); Forming an asphalt sheet layer (300) by attaching and constructing an asphalt sheet containing a functional waterproofing material composition for composite waterproofing of new and repaired asphalt bridge surfaces; And after pouring asphalt concrete, compacting and curing it to form an asphalt pavement layer (400). A composite waterproofing construction method for a bridge surface, comprising:
According to clause 5,
The asphalt sheet is
After impregnating the central reinforcement material 302, which consists of polyester long fiber or short fiber nonwoven fabric, with the functional waterproofing material composition (301, 301') for composite waterproofing of new and repaired asphalt bridges, the upper surface, lower surface, or A composite waterproofing construction method for a bridge surface, characterized in that it is finished by attaching silica sand (303) to both sides.