KR102645981B1 - Modified asphalt composition for film-type waterproofing and composite waterproofing sheet of newly established and repaired bridges and newly established and repaired bridges waterproofing construction method using the same - Google Patents

Abstract

The present invention includes 50 to 80% by weight of asphalt, 10 to 30% by weight of filler, 5 to 20% by weight of modifying admixture, 1 to 10% by weight of tackifier, and 1 to 10% by weight of plasticizer; The filler includes 100 parts by weight of silicon oxide or surface-treated silicon oxide, 50 to 70 parts by weight of slaked lime, 1 to 10 parts by weight of surface-modified alumina-gadolinium oxide particles, 1 to 10 parts by weight of cordierite, and 1 to 1 to 10 parts by weight of potassium titanate whisker. Contains 10 parts by weight; The modified admixture includes 100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-ethylidene norbornene copolymer, 10 to 30 parts by weight of isobutylene-paramethylstyrene, and 1 aminoguanidine acid addition salt. Contains from 1 to 10 parts by weight, and 1 to 10 parts by weight of carvedilol; The surface-treated silicon oxide includes preparing a mixture by ball milling 100 parts by weight of silicon oxide, 100 to 300 parts by weight of silicone oil, and 1 to 20 parts by weight of isofloridoside of Chemical Formula 1, and dissolving the mixture in toluene. It is manufactured by a method comprising the step of dispersing and then separating by centrifugation to produce surface-treated silicon oxide; The aminoguanidine acid addition salt is one or more selected from the group consisting of aminoguanidine bicarbonate, aminoguanidine phosphate, and aminoguanidine hydrochloride,
Since the same material between the asphalt coating waterproof layer and the asphalt sheet layer is used to form a composite waterproof layer, the occurrence of cracks or fractures at the joint area due to contraction/expansion due to external temperature changes can be improved, and it is resistant to chloride, alkali, and water. It relates to a modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces that has excellent durability and can effectively prevent cracking, lifting, peeling, or rupture, and a waterproofing construction method for new and repaired bridge surfaces using the same.

Description

Modified asphalt composition for film-type waterproofing and composite waterproofing sheet for new and repaired bridge surfaces and waterproofing construction method for new and repaired bridge surfaces using the same {Modified asphalt composition for film-type waterproofing and composite waterproofing sheet of newly established and repaired bridges and newly established and repaired bridges waterproofing construction method using the same}

The present invention forms a composite waterproof layer using the same material between the asphalt coating waterproof layer and the asphalt sheet layer, so that it is possible to improve the occurrence of cracks or fractures at the joint area due to contraction/expansion due to external temperature changes, and chloride and alkali , a modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces that has excellent durability against water, can effectively prevent cracking, lifting, peeling, or rupture, and can exhibit excellent adhesive and tensile performance; and This relates to a waterproofing construction method for new and repaired bridge surfaces using this method.

The slab of a bridge is complexly affected by repetitive loads, vibration, shock, and shear from traffic vehicles, as well as contraction and expansion due to temperature changes. A waterproofing material is applied to the upper surface of the slab of such bridges to prevent deterioration and corrosion of the reinforcing bars due to water and chloride penetrating from the surface pavement layer. If the quality of these waterproofing materials deteriorates or the waterproofing effect deteriorates, the slab of the bridge, where various conditions play a complex role, will be damaged. As a result, corrosion of the reinforcing bars occurs, weakening the overall durability of the bridge, gradually deteriorating the condition of the bridge and causing serious risks to the safety of the bridge. Therefore, it is important to manufacture excellent quality waterproofing materials.

In Korea, penetration-type waterproofing materials have been mainly used for ease of use and economy, but in recently constructed bridges, it has been revealed that these penetration-type waterproofing materials have problems with durability, penetration depth, and crack resistance, and thus, coating-type or sheet-type waterproofing materials have been used. The use of is gradually increasing.

The film-type waterproofing material is a water-based or oil-based liquid material applied to the upper surface of the bridge slab with a roller, spray, or brush to form a waterproof layer. Some film-type waterproofing materials have poor adhesion to the asphalt concrete, which is the bridge surface pavement layer, and the thickness of the waterproof layer is low. There is a risk of unevenness. Additionally, when cracks occur on the slab surface of a bridge, the ability to respond is reduced.

On the other hand, in the case of sheet-type waterproofing material, a uniform waterproofing layer thickness can be formed and it can also respond to cracks in the bridge slab base surface. This sheet-type waterproofing material is implemented by applying a primer to the upper surface of the bridge slab and then attaching it. However, these sheet-type waterproofing materials can be damaged by vehicle loads, and there is a risk of being torn or separated by asphalt or concrete finishers during bridge pavement construction. Ultimately, there is a problem in that water or chloride infiltrating from the bridge surface pavement layer penetrates into the bridge slab, causing the bridge slab to deteriorate or the reinforcing bars to corrode.

Accordingly, various composite waterproofing methods that complement the shortcomings of the sheet waterproofing method and the film waterproofing method have been developed and are being applied in the field. After construction, if there is a defect in any part of the waterproofing area, waterproofing will directly result in water leakage. In particular, most of the parts where water leaks occur are the joints where sheets are connected, so the joints are a very important construction point in waterproofing work.

However, the composite waterproofing method has a problem in that the sheet is dissolved by the organic solvent contained in the coating material, which not only lacks waterproofing performance, but also causes defects such as damage to the structure by discharge of dissolved substances through cracks in the structure. In particular, the lack of interlayer integrity between the two materials caused by the use of different materials between the coating material and the sheet causes separation between the layers and lack of flexibility, resulting in fracture of the joint between the sheets and rapid loss of adhesion at the interface. There is a problem in that the water tightness is weakened due to lowering. In addition, there is still a problem that the sheet repeatedly contracts and expands depending on the outside temperature, causing cracks or breaks in the coating film at the joint, resulting in water leakage.

Republic of Korea Patent No. 10-1073472 Republic of Korea Patent No. 10-1345436 Republic of Korea Patent No. 10-1800567 Republic of Korea Patent Publication No. 10-2017-0040273

The present invention was devised to solve the above-mentioned problems, and one embodiment of the present invention forms a waterproof layer with excellent adhesion to asphalt concrete and a uniform thickness, while preventing damage due to the use of different materials between the coating material and the sheet. It is possible to improve the problem of fracture of joints between sheets and loss of adhesion at the interface due to separation between layers and lack of flexibility, and it is possible to improve the problem of cracks or fractures in the coating film at the joint area as the sheets repeat contraction and expansion depending on the temperature. The purpose is to provide a modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces that can solve the decline in waterproofing function, and a waterproofing construction method for new and repaired bridge surfaces 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 filler, 5 to 20% by weight of modifying admixture, 1 to 10% by weight of tackifier, and 1 to 10% by weight of plasticizer;

The filler includes 100 parts by weight of silicon oxide or surface-treated silicon oxide, 50 to 70 parts by weight of slaked lime, 1 to 10 parts by weight of surface-modified alumina-gadolinium oxide particles, 1 to 10 parts by weight of cordierite, and 1 to 1 to 10 parts by weight of potassium titanate whisker. Contains 10 parts by weight;

The modified admixture includes 100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-ethylidene norbornene copolymer, 10 to 30 parts by weight of isobutylene-paramethylstyrene, and 1 aminoguanidine acid addition salt. Contains from 1 to 10 parts by weight, and 1 to 10 parts by weight of carvedilol;

The surface-treated silicon oxide is prepared by ball milling 100 parts by weight of silicon oxide, 100 to 300 parts by weight of silicone oil, and 1 to 20 parts by weight of isofloridoside of the following formula 1, and preparing the mixture. It is manufactured by a method comprising dispersing in toluene and then separating by centrifugation to produce surface-treated silicon oxide;

The aminoguanidine acid addition salt is at least one selected from the group consisting of aminoguanidine bicarbonate, aminoguanidine phosphate, and aminoguanidine hydrochloride. It provides a modified asphalt composition for paint-type waterproofing and composite waterproofing sheets for new and repaired bridges.

[Formula 1]

The surface-modified alumina-gadolinium oxide particles are

Preparing a mixed powder by mixing alumina powder and gadolinium oxide powder at a weight ratio of 1:1 to 1.5; Preparing a mixed solution by mixing 1 to 20 parts by weight of a terbium precursor with 100 parts by weight of the mixed powder; Preparing ceramic particles by heating the mixed solution at 500 to 700° C. for 2 to 5 hours; and mixing 100 parts by weight of the ceramic particles with 10 to 30 parts by weight of decaffeoylquinic acid to produce surface-modified alumina-gadolinium oxide particles.

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 step of preparing the mixed solution includes mixing 1 to 20 parts by weight of a terbium precursor and 1 to 10 parts by weight of a praseodymium precursor with respect to 100 parts by weight of the mixed powder;

The terbium precursor is a group consisting of terbium-butoxide, terbium-2,4-pentanedionate, terbium-methoxyethoxide, and terbium-2,2,6,6-tetramethyl-3,5-heptanedionate. It is one or more types selected from,

The praseodymium precursors include praseodymium-butoxide, praseodymium-hexafluoropentanedionate, praseodymium-2,4-pentanedionate, praseodymium-2,2,6,6-tetramethyl-3,5-heptanedionate, and praseodymium. (III) -6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octane diionate may be one or more selected from the group consisting of.

The modified admixture

It further contains 1 to 10 parts by weight of a ketoenol tautomer compound based on 100 parts by weight of the styrene-butadiene rubber (SBR);

The ketoenol tautomeric compound may be a mixture of stearyl acetoacetate and benzoylacetone in a weight ratio of 1:0.1 to 1.

Meanwhile, another embodiment of the present invention is a waterproofing construction method for new and repaired bridge surfaces using a modified asphalt composition for film-type waterproofing and composite waterproofing sheets for new and repaired 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 modified asphalt composition for film waterproofing and composite waterproofing sheets for new and repaired bridge surfaces, forming an asphalt film waterproofing layer (200); Forming an asphalt sheet layer (300) by attaching an asphalt sheet containing a modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces; and pouring asphalt concrete and then compacting and curing it to form an asphalt pavement layer (400).

The asphalt sheet is made by impregnating the central reinforcement (302) composed of polyester long fiber or short fiber non-woven fabric with the modified asphalt composition (301, 301') for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces. , It may be finished by attaching silica sand 303 to the top, bottom, or both sides of the asphalt sheet.

According to an embodiment of the present invention, the modified asphalt composition for film-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces and the waterproofing construction method for new and repaired bridge surfaces using the same, use the same material between the asphalt film waterproofing layer and the asphalt sheet layer. Since it forms a composite waterproof layer, it has the advantage of exhibiting excellent adhesive and tensile performance and improving waterproofing performance. In addition, it can improve the occurrence of cracks or fractures at the joint due to contraction/expansion due to external temperature changes, and has excellent durability against chloride, alkali, and water, effectively preventing cracks, lifting, peeling, or fracture. This has the advantage of contributing to extending the lifespan of the bridge surface.

Figure 1 shows a construction flow chart of a waterproofing construction method for a new and repaired bridge according to an embodiment of the present invention.
Figure 2 shows a schematic construction cross-sectional view constructed according to the waterproofing construction method for new and repaired bridge surfaces 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 filler, 5 to 20% by weight of modifying admixture, 1 to 10% by weight of tackifier, and 1 to 10% by weight of plasticizer;

The filler includes 100 parts by weight of silicon oxide or surface-treated silicon oxide, 50 to 70 parts by weight of slaked lime, 1 to 10 parts by weight of surface-modified alumina-gadolinium oxide particles, 1 to 10 parts by weight of cordierite, and 1 to 1 to 10 parts by weight of potassium titanate whisker. Contains 10 parts by weight;

The modified admixture includes 100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-ethylidene norbornene copolymer, 10 to 30 parts by weight of isobutylene-paramethylstyrene, and 1 aminoguanidine acid addition salt. Contains from 1 to 10 parts by weight, and 1 to 10 parts by weight of carvedilol;

The surface-treated silicon oxide is prepared by ball milling 100 parts by weight of silicon oxide, 100 to 300 parts by weight of silicone oil, and 1 to 20 parts by weight of isofloridoside of the following formula 1, and preparing the mixture. It is manufactured by a method comprising dispersing in toluene and then separating by centrifugation to produce surface-treated silicon oxide;

The aminoguanidine acid addition salt is at least one selected from the group consisting of aminoguanidine bicarbonate, aminoguanidine phosphate, and aminoguanidine hydrochloride. It provides a modified asphalt composition for paint-type waterproofing and composite waterproofing sheets for new and repaired bridges.

[Formula 1]

According to the modified asphalt composition for film-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces according to an embodiment of the present invention and the waterproofing construction method for new and repaired bridge surfaces using the same, the same material is used between the asphalt film waterproofing layer and the asphalt sheet layer. Since it is used to form a composite waterproof layer, it has the advantage of demonstrating excellent adhesive and tensile performance and improving waterproofing performance. In addition, it can improve the occurrence of cracks or fractures at the joint due to contraction/expansion due to external temperature changes, and has excellent durability against chloride, alkali, and water, effectively preventing cracks, lifting, peeling, or fracture. This has the advantage of contributing to extending the lifespan of the bridge surface.

More specifically, the modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces according to an embodiment of the present invention contains 50 to 80% by weight of asphalt, 10 to 30% by weight of filler, and 5 to 20% by weight of modified admixture. , 1 to 10% by weight of a tackifier and 1 to 10% by weight of a 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 it 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 modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces 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 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, impermeability, It functions to provide durability such as heat resistance and fatigue resistance.

The filler may be included in the range of 10 to 30% by weight in the modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces of the present invention. If the content of the high-performance filler is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the high-performance 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 filler is 100 parts by weight of silicon oxide or surface-treated silicon oxide, 50 to 70 parts by weight of slaked lime, 1 to 10 parts by weight of surface-modified alumina-gadolinium oxide particles, 1 to 10 parts by weight of cordierite, and titanic acid. Potassium whiskers containing 1 to 10 parts by weight can be preferably used.

First, the silicon oxide or surface-treated silicon oxide fills pores to form a stable coating film of uniform thickness, improves compressive strength, dent resistance, hardness, and wear resistance, and has excellent water resistance, impermeability, and durability. It functions to provide durability in terms of chemical resistance, heat resistance, and fatigue resistance. In addition, it inhibits aging and improves long-term durability. In particular, surface-treated silicon oxide improves dispersibility and improves miscibility with the modified admixture components, thereby playing a role in maintaining more uniform physical properties.

The surface-treated silicon oxide is prepared by ball milling 100 parts by weight of silicon oxide, 100 to 300 parts by weight of silicone oil, and 1 to 20 parts by weight of isofloridoside of the following formula 1, and preparing the mixture. It may be manufactured by a method comprising dispersing in toluene and then separating using a centrifuge to produce surface-treated silicon oxide.

Silicone oil is coated on the surface of the silicon oxide to prevent agglomeration of the silicon oxide, induce uniform phase separation, and increase miscibility with the modified admixture component to further improve the durability and wear resistance of the waterproofing coating film. Isofloridoside of Chemical Formula 1 serves to prevent deterioration in the performance of waterproofing materials by reducing changes in composition due to temperature changes.

Hereinafter, the content of other components constituting the filler is based on 100 parts by weight of the silicon oxide or surface-treated silicon oxide.

The slaked lime fills pores to form a stable coating film of uniform thickness, improves compressive strength and dent resistance, provides excellent alkali resistance and chloride ion penetration resistance, and prevents peeling. It functions to improve long-term durability by suppressing aging and improve fatigue resistance of the composition by increasing viscosity.

The slaked lime is preferably contained in the range of 50 to 70 parts by weight based on 100 parts by weight of the silicon oxide or surface-treated silicon oxide. If the content of slaked lime is too small, there is a problem that the improvement effect described above may be insufficient, and if the content of slaked lime is too large, there is a problem that strength characteristics and durability may be reduced.

The surface-modified alumina-gadolinium oxide particles improve compressive strength, dent resistance, hardness, and wear resistance, and provide excellent alkali resistance, chloride ion penetration resistance, impermeability, water resistance, heat resistance, fatigue resistance, and durability against peeling phenomenon. It not only prevents aging, but also inhibits aging and improves long-term durability.

More specifically, the surface-modified alumina-gadolinium oxide particles are prepared by mixing alumina powder and gadolinium oxide powder at a weight ratio of 1:1 to 1.5 to prepare a mixed powder; Preparing a mixed solution by mixing 1 to 20 parts by weight of a terbium precursor with 100 parts by weight of the mixed powder; Preparing ceramic particles by heating the mixed solution at 500 to 700° C. for 2 to 5 hours; and preparing surface-modified alumina-gadolinium oxide particles by mixing 100 parts by weight of the ceramic particles with 10 to 30 parts by weight of dicaffeoylquinic acid.

At this time, the terbium precursor serves to maintain the shape and improve the strength of the formed ceramic particles (alumina-gadolinium oxide particles). These terbium precursors are terbium-butoxide, terbium-butoxide, terbium-2,4-pentanedionate, terbium-methoxyethoxide, and terbium-2,2,6,6-tetramethyl-3,5-heptane. It may be one or more types selected from the group consisting of dionates.

[Formula 1]

The decaffeoylquinic acid serves to realize excellent waterproofing function by forming a waterproof coating film with excellent water resistance, chloride ion penetration resistance, durability against alkalis and acids, and weather resistance. In addition, it plays a role in preventing deterioration in the performance of waterproofing materials by reducing changes in physical properties due to temperature changes.

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.

In addition, among the steps of producing the surface-modified alumina-gadolinium oxide particles, the step of preparing the mixed solution includes mixing 1 to 20 parts by weight of the terbium precursor and 1 to 10 parts by weight of the praseodymium precursor with respect to 100 parts by weight of the mixed powder. It can be manufactured in steps.

At this time, the praseodymium precursor serves to further improve the strength of ceramic particles (alumina-gadolinium oxide particles). These praseodymium precursors include praseodymium-butoxide, praseodymium-hexafluoropentanedionate, praseodymium-2,4-pentanedionate, praseodymium-2,2,6,6-tetramethyl-3,5-heptanedionate, and praseodymium. (III) -6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octane diionate may be one or more selected from the group consisting of.

The surface-modified alumina-gadolinium oxide particles are preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the silicon oxide or surface-treated silicon oxide. If the content of the surface-modified alumina-gadolinium oxide particles is too small, there is a problem that the improvement effect may be insufficient, and if the content of the surface-modified alumina-gadolinium oxide particles is too high, the improvement effect may no longer be achieved. There is a problem that price competitiveness may decrease due to lack of expectations.

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.

The cordierite is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the silicon oxide or surface-treated silicon oxide. 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 potassium titanate whisker fills pores to form a stable coating film of uniform thickness, improves compressive strength, dent resistance, hardness and abrasion resistance, and provides excellent heat resistance and fatigue resistance durability. .

The potassium titanate whisker is preferably contained in the range of 1 to 10 parts by weight based on 100 parts by weight of the silicon oxide or surface-treated silicon oxide. If the content of the potassium titanate whiskers is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the potassium titanate whiskers is too high, there is a problem that the strength performance may be reduced.

Meanwhile, the modified 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.

More specifically, the modified admixture includes 100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-ethylidenenorbornene copolymer, 10 to 30 parts by weight of isobutylene-paramethylstyrene, and amino One containing 1 to 10 parts by weight of guanidine acid addition salt and 1 to 10 parts by weight of carvedilol can be preferably used.

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 improved admixture is based on 100 parts by weight of the styrene-butadiene rubber (SBR).

The ethylene-propylene-ethylidene norbornene copolymer improves workability by improving compatibility with asphalt, realizes excellent waterproof performance, tensile performance, and shear adhesion performance, and increases elastic strength to improve impact resistance, It has the function of improving crack resistance, plastic deformation resistance, and bending stability, and improving thermal stability and low-temperature characteristics.

This ethylene-propylene-ethylidene norbornene copolymer is used with an ethylidene norbornene content of 1 to 5 mol%, which not only further improves the above-described improvement effect, but also has the effect of particularly improving elastic strength. . The ethylene-propylene-ethylidene norbornene copolymer having the above ethylidene norbornene content ratio can be used as EP93 product from JSR.

The ethylene-propylene-ethylidene norbornene copolymer 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 the ethylene-propylene-ethylidene norbornene copolymer is too small, there is a problem that the improvement effect may be insufficient, and if the content of the ethylene-propylene-ethylidene norbornene copolymer is too high, There is a problem in that hardness and strength performance may be reduced.

The isobutylene-paramethylstyrene 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, and plasticity. It not only improves deformation resistance and bending properties, improves thermal stability and low-temperature characteristics, but also provides excellent durability in terms of water resistance, impermeability, heat resistance and fatigue resistance.

The isobutylene-paramethylstyrene is preferably contained in the range of 30 to 50 parts by weight based on 100 parts by weight of the styrene-butadiene rubber (SBR). If the content of the isobutylene-paramethylstyrene is too small, there is a problem that the improvement effect may be insufficient, and if the content of the isobutylene-paramethylstyrene is too high, no further improvement effect can be expected. There is a problem that price competitiveness may decrease.

The aminoguanidine acid addition salt improves excellent miscibility and workability, and provides durability in alkali resistance, chloride ion penetration resistance, and fatigue resistance.

The aminoguanidine acid addition salt may be one or more selected from the group consisting of aminoguanidine bicarbonate, aminoguanidine phosphate, and aminoguanidine hydrochloride. This aminoguanidine acid addition salt may be prepared by a known method commonly used in the art, and a commercially available product, such as aminoguanidine bicarbonate product from Tokyo Chemical Industry Co., Ltd., may be used.

The aminoguanidine acid addition salt 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 aminoguanidine acid addition salt is too small, there is a problem that the above-described improvement effect may be insufficient, and if the content of the aminoguanidine acid addition salt is too high, no further improvement effect can be expected, which will reduce price competitiveness. There are possible problems.

The carvedilol improves workability by improving compatibility with asphalt, and provides excellent alkali resistance, chloride ion penetration resistance, and fatigue resistance durability.

The carvedilol 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 carvedilol content is too small, there is a problem that the improvement effect described above may be insufficient, and if the carvedilol content is too high, there is a problem that strength performance may be reduced.

The modified admixture of the present invention may further contain 1 to 10 parts by weight of a ketoenol tautomeric compound. The ketoenol tautomer compound functions to improve durability such as excellent heat stability, shear bond strain (%), chemical resistance, and chloride ion penetration resistance.

This ketoenol tautomeric compound may be a mixture of stearyl acetoacetate and benzoylacetone in 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).

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 modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces 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 modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces of the present invention in the range of 1 to 10% by weight. 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 waterproofing construction method for new and repaired bridge surfaces using the modified asphalt composition for film-type waterproofing and composite waterproofing sheets for new and repaired 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 modified asphalt composition for film waterproofing and composite waterproofing sheets for new and repaired bridge surfaces, forming an asphalt film waterproofing layer (200); Forming an asphalt sheet layer (300) by attaching an asphalt sheet containing a modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces; and pouring asphalt concrete and then 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 modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces of the present invention can achieve sufficient adhesion to the base surface, so the application of primer can be omitted, but has better adhesion to the base surface. In order to achieve improvement and integration effects, a step of applying a general primer commonly used in the art may be further included.

That is, the waterproofing construction method for new and repaired bridge surfaces 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, forming an asphalt film waterproofing layer (200) by applying a modified asphalt composition for film-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces; This can be performed by heating and melting the asphalt composition at a temperature range of 180 to 220° C., completely mixing the asphalt composition, and then applying it. 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 impregnated with a central reinforcement (302) composed of polyester long fiber or short fiber non-woven fabric with the modified asphalt composition (301, 301') for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces. After this, the asphalt sheet may be finished by attaching silica sand 303 to the top, bottom, or both sides. The asphalt sheet may have a thickness of 2 to 3 mm.

At this time, the impregnation of the central reinforcement 302 may be carried out by heating and melting the modified asphalt composition for film-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces 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 flowchart of the waterproofing construction method for new and repaired bridge surfaces according to an embodiment of the present invention is shown in Figure 1; A schematic construction cross-sectional view constructed according to the waterproofing construction method for new and repaired bridge surfaces according to an embodiment of the present invention is shown in Figure 2.

According to the modified asphalt composition for film-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces according to an embodiment of the present invention and the waterproofing construction method for new and repaired bridge surfaces using the same, the same material is used between the asphalt film waterproofing layer and the asphalt sheet layer. Since it is used to form a composite waterproof layer, it has the advantage of demonstrating excellent adhesive and tensile performance and improving waterproofing performance. In addition, it can improve the occurrence of cracks or fractures at the joint due to contraction/expansion due to external temperature changes, and has excellent durability against chloride, alkali, and water, effectively preventing cracks, lifting, peeling, or fracture. This has the advantage of contributing to extending the lifespan of the bridge surface.

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.

[Preparation Example 1] Surface-modified alumina-gadolinium oxide particles

A mixed powder was prepared by mixing Al ₂ O ₃ powder (purity over 99%, average particle diameter 20 ㎛) and Gd ₂ O ₃ powder (purity over 99%, average particle diameter 20 ㎛) at a weight ratio of 1:1. Separately, a terbium precursor solution was prepared by dissolving terbium-2,4-pentanedionate in 1-methoxy-2-propanol.

A mixed solution was prepared by mixing the mixed powder and the terbium-2,4-pentanedionate solution so that 15 parts by weight of terbium-2,4-pentanedionate was maintained based on 100 parts by weight of the mixed powder. Thereafter, the mixed solution was heated at 600° C. for 3 hours using an electric furnace, and then cooled to room temperature to prepare ceramic particles.

Afterwards, 100 parts by weight of the ceramic particles and 20 parts by weight of 1,5-dicaffeoylquinic acid were stirred for 10 hours to prepare surface-modified alumina-gadolinium oxide particles.

[Preparation Example 2] Surface-modified alumina-gadolinium oxide particles

Preparation Example 1 was carried out in the same manner as above, but surface-modified alumina-oxidized using a mixed solution containing 100 parts by weight of the mixed powder, 15 parts by weight of terbium-2,4-pentanedionate, and 5 parts by weight of praseodymium-butoxide. Gadolinium particles were prepared. At this time, the terbium-2,4-pentanedionate and praseodymium-butoxide were each dissolved in 1-methoxy-2-propanol and used as a solution.

[Preparation Example 3] Surface-treated silicon oxide

A mixture was prepared by ball milling 100 parts by weight of silicon oxide, 150 parts by weight of silicone oil, and 15 parts by weight of isofloridoside of Chemical Formula 1 for 10 hours at room temperature and pressure. Afterwards, the mixture was dispersed in toluene and separated by centrifugation to prepare surface-treated silicon oxide.

<Examples and Comparative Examples>

Examples 1 to 3 and Comparative Examples 1 to 2: Preparation of modified asphalt compositions for film-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces

Modified asphalt compositions and comparative compositions for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces were prepared by mixing under the component and content conditions shown in Table 1 below.

Classification (weight%) Example 1 Example 2 Example 3 Comparative Example 1 Comparative example 2 5 types of straight asphalt 48 54 54 62 48 blown asphalt 14 8 8 - 14 filler 15 15 15 15 15 weight part silicon oxide 100 - - 100 100 Surface treated silicon oxide - 100
[Production Example 3] 100
[Production Example 3] - - slaked lime 55 55 55 30 55 Surface modified alumina-gadolinium oxide particles 7
[Production Example 1] 7
[Production Example 1] 7
[Production Example 2] - - Alumina particles - - - - 7 cordier light 4 4 4 - - Potassium titanate whisker 3 3 3 - - Modified admixture 13 13 13 13 13 weight part Styrene-butadiene rubber 100 100 100 100 100 Ethylene-propylene-ethylidenenorbornene copolymer 60 60 60 - 10 Isobutylene-Paramethylstyrene 22 22 22 22 22 Aminoguanidine acid addition salt Aminoguanidine Bicarbonate 4 - 2 - - Aminoguanidine Phosphate - 4 2 - - carvedilol 2 2 2 - - Ketoenol tautomeric compounds Stearyl acetoacetate - 1.5 2 - - Benzoylacetone - 1.5 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 - - Ethylene-propylene-ethylidene norbornene copolymer: EP93 product from JSR, the ethylidene norbornene content is 3 mol%.

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

As shown in Figure 3, the center reinforcement composed of polyester long fiber nonwoven fabric was prepared as a modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces according to Examples 1 to 3, respectively, and Comparative Example 1. and the comparative composition according to Comparative Example 2, and then finished by attaching No. 7 silica sand on both sides to prepare an asphalt sheet.

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 modified asphalt compositions for film-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces according to Examples 1 to 3 and the comparative compositions according to Comparative Examples 1 and 2, the quality standards for coating waterproofing materials for concrete bridge surfaces (KS) A physical property test was conducted according to F 4932), 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 (%) 86 89 89 70 74 Seal
Performance tensile strength
(N/㎟) Untreated 1.8 2.1 2.1 1.2 1.4 Alkaline treatment 1.5 1.7 1.8 0.8 1.2 Heat treatment 1.7 1.6 1.9 0.6 0.9 elongation rate
(%) Untreated 114 117 116 90 101 Alkaline treatment 103 108 110 82 94 Heat treatment 104 107 112 80 98 shear
adhesion
Performance Shear bond strength
(N/㎟) -20℃ 1.1 1.4 1.3 0.5 0.8 20℃ 0.20 0.23 0.24 0.13 0.18 Shear adhesion
Strain rate (%) -20℃ 0.6 0.8 0.9 0.2 0.4 20℃ 1.2 1.3 1.5 0.6 0.9 tensile bond strength
(N/㎟) -20℃ 1.6 1.8 2.0 0.6 1.2 20℃ 0.8 1.0 1.0 0.3 0.5 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) 73 64 60 163 101 Chemical resistance (10% sulfuric acid) clear clear clear Occurrence of heaviness Occurrence of heaviness Chemical resistance (10% HCl) clear clear clear Occurrence of heaviness clear Chemical resistance (10% caustic soda) clear clear clear Occurrence of heaviness clear inner dent clear clear clear Hole occurrence Occurrence of heaviness Heat resistance dimension
stability(%) 150℃30 minutes 0.5 0.4 0.2 2.3 2.1 Fatigue resistance clear clear clear Balance generation Balance generation 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℃ 0.7 0.7 0.9 0.2 0.3

As shown in Table 2, the modified asphalt compositions for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces according to Examples 1 to 3 of the present invention are the comparative compositions according to Comparative Examples 1 and 2. By comparison, it was confirmed that excellent performance was observed.

<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 5.4 5.6 5.7 2.2 3.8 Alkaline treatment 4.4 4.6 5.0 1.6 3.2 Heat treatment 4.5 4.7 5.4 1.6 3.4 elongation rate
(%) Untreated 54 56 57 32 36 Alkaline treatment 46 47 48 19 30 Heat treatment 48 51 52 19 30 shear
adhesion
Performance Shear bond strength
(N/㎟) -10℃ 1.7 1.9 2.3 1.1 1.4 23℃ 0.5 0.6 0.8 0.1 0.3 Shear adhesion
Strain rate (%) -10℃ 0.6 0.7 0.8 0.2 0.3 23℃ 1.4 1.6 1.8 0.5 0.8 tensile bond strength
(N/㎟) -10℃ 2.0 2.1 2.3 0.9 1.2 23℃ 1.3 1.5 1.5 0.2 0.7 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) 34 30 28 91 76 inner dent clear clear clear Hole occurrence clear Heat resistance dimension
stability(%) 150℃30 minutes 0.8 0.6 0.3 2.8 1.7 Fatigue resistance clear clear clear Balance generation clear Crack resistance -10℃ clear clear clear Balance generation clear 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℃ 1.3 1.4 1.5 0.2 0.5

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, those 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 changed 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': Modified asphalt composition for film-type waterproofing and composite waterproofing sheets for new and repaired 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 filler, 5 to 20% by weight of modifying admixture, 1 to 10% by weight of tackifier, and 1 to 10% by weight of plasticizer;
The filler is
100 parts by weight of silicon oxide or surface-treated silicon oxide, 50 to 70 parts by weight of slaked lime, 1 to 10 parts by weight of surface-modified alumina-gadolinium oxide particles, 1 to 10 parts by weight of cordierite, and 1 to 10 parts by weight of potassium titanate whisker. Contains;
The modified admixture
100 parts by weight of styrene-butadiene rubber (SBR), 50 to 80 parts by weight of ethylene-propylene-ethylidene norbornene copolymer, 10 to 30 parts by weight of isobutylene-paramethylstyrene, 1 to 10 parts by weight of aminoguanidine acid addition salt. , and 1 to 10 parts by weight of carvedilol;
The surface treated silicon oxide is
Preparing a mixture by ball milling 100 parts by weight of silicon oxide, 100 to 300 parts by weight of silicone oil, and 1 to 20 parts by weight of isofloridoside of the following formula (1), dispersing the mixture in toluene, and centrifuging the mixture. It is manufactured by a method comprising the step of separating and producing surface-treated silicon oxide;
The aminoguanidine acid addition salt is
A modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces, characterized in that it is one or more selected from the group consisting of aminoguanidine bicarbonate, aminoguanidine phosphate, and aminoguanidine hydrochloride.
[Formula 1]

According to paragraph 1,
The surface-modified alumina-gadolinium oxide particles are
Preparing a mixed powder by mixing alumina powder and gadolinium oxide powder at a weight ratio of 1:1 to 1.5;
Preparing a mixed solution by mixing 1 to 20 parts by weight of a terbium precursor with 100 parts by weight of the mixed powder;
Preparing ceramic particles by heating the mixed solution at 500 to 700° C. for 2 to 5 hours; and
It is manufactured by a method comprising: mixing 100 parts by weight of the ceramic particles and 10 to 30 parts by weight of dicaffeoylquinic acid to produce surface-modified alumina-gadolinium oxide particles,
The above decaffeoylquinic acid
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. Modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces.
According to paragraph 2,
The step of preparing the mixed solution is
A step of mixing 1 to 20 parts by weight of a terbium precursor and 1 to 10 parts by weight of a praseodymium precursor with respect to 100 parts by weight of the mixed powder;
The terbium precursor is
One selected from the group consisting of terbium-butoxide, terbium-2,4-pentanedionate, terbium-methoxyethoxide, and terbium-2,2,6,6-tetramethyl-3,5-heptanedionate. It's more than that,
The praseodymium precursor is
Praseodymium-butoxide, Praseodymium-hexafluoropentanedionate, Praseodymium-2,4-pentanedionate, Praseodymium-2,2,6,6-tetramethyl-3,5-heptanedionate and Praseodymium(III)- A coating type for new and repaired bridges, characterized in that it is one or more selected from the group consisting of 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octane ionate. Modified asphalt composition for waterproofing and composite waterproofing sheets.
According to paragraph 1,
The modified admixture
It further contains 1 to 10 parts by weight of a ketoenol tautomer compound based on 100 parts by weight of the styrene-butadiene rubber (SBR);
The ketoenol tautomeric compound is
A modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces, characterized in that stearyl acetoacetate and benzoylacetone are mixed at a weight ratio of 1:0.1 to 1.
A waterproofing construction method for new and repaired bridge surfaces using a modified asphalt composition for film-type waterproofing and composite waterproofing sheets for new and repaired 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 modified asphalt composition for film waterproofing and composite waterproofing sheets for new and repaired bridge surfaces, forming an asphalt film waterproofing layer (200); Forming an asphalt sheet layer (300) by attaching an asphalt sheet containing a modified asphalt composition for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces; And after pouring asphalt concrete, compacting and curing it to form an asphalt pavement layer (400). A waterproofing construction method for new and repaired bridges, comprising:
According to clause 5,
The asphalt sheet is
After impregnating the central reinforcement material 302, which includes polyester long fiber or short fiber nonwoven fabric, with the modified asphalt composition (301, 301') for coating-type waterproofing and composite waterproofing sheets for new and repaired bridge surfaces, the asphalt sheet A waterproofing construction method for new and repaired bridge surfaces, characterized in that it is finished by attaching silica sand (303) to the top, bottom, or both sides.