KR100883743B1 - Water-proofing construction method using water-proofting composites for bridge or concrete constructions - Google Patents

Abstract

A water-proofing construction method dipping glass fiber roving cloth in a water-proofing composition for bridge or concrete constructions is provided to increase acid resistance and weather resistance and to prolong the water proofing maintenance lifetime by forming a complete waterproof layer integrated with all floors. A water-proofing construction method dipping glass fiber roving cloth in a water-proofing composition for bridge or concrete constructions comprises a coating step(S10) for applying an alkali resistant epoxy-based primer on the surface of concrete; a first waterproof film generating step(S20) for dipping a water-proofing composition for bridge or concrete constructions containing epoxy resin, urethane type epoxy resin, tar, and hardener and laminating them; an adhesion improving step(S30) for sprinkling the silica(SiO2) at the upper part of the waterproof film; a second waterproof film generating step(S40) for applying the water-proofing composition for bridge or concrete constructions; and a binding step(S50) for applying ascon at the same time of the second waterproof film generating step and binding the waterproof layer and ascon layer.

Description

Bridge waterproofing method using water-repellent composition of bridge or concrete structure {WATER-PROOFING CONSTRUCTION METHOD USING WATER-PROOFTING COMPOSITES FOR BRIDGE OR CONCRETE CONSTRUCTIONS}

The present invention relates to a bridge waterproofing method using a bridge waterproofing composition of a bridge or concrete structure, more specifically, the bridge waterproofing composition excellent in durability, adhesion, waterproofness, heat resistance and the like compared to the conventional waterproofing method glass fiber roving cross The present invention relates to a composite bridge waterproofing method impregnated in and laminated to concrete.

In the pavement packaging, the waterproofing layer functions to protect the bottom plate from the infiltration water, and plays a role of securing waterproofness and adhesiveness, forming structural entities, and securing durability. As water penetrates, fatigue breakdown is promoted in concrete deck and corrosion of reinforcing steel and steel reduces bridge durability. Waterproof layer plays an important role as a layer to improve the durability of pavement and floorboard by preventing water penetration. . As the waterproof layer was not recognized in the early stage of application, the standard was not established. However, the importance of the waterproof layer is increasing in accordance with the results of the recent research that various waterproofing materials and methods have been developed to affect the bridge deck protection and the mechanical relationship with the asphalt layer. have.

Bridge waterproofing agent is used by mixing two or more raw materials such as asphalt, synthetic rubber, synthetic resin, fiber, mineral and volatile solvent. In general, the use of the cross-linking waterproof layer may be classified into a penetration system, a sheet system, a coating system, and a packaging system.

First, the permeable waterproofing agent penetrates along the micropores on the surface of the concrete bridge deck to form a primary water film, and is combined with the silicon (Si) component in the concrete by continuous chemical reaction, and diffuses to almost uniform depth. It forms a role to protect concrete from damage caused by moisture and salt. It was mainly used in the past, but it is hardly applied at present due to its poor waterproofing performance compared to coating, sheet, and packaging waterproofing agents.

Second, the sheet-based waterproofing agent has the advantage of excellent waterproofing effect and good adhesion to the packaging layer. In order to prevent breakage by construction load, the surface is treated with glass fiber, and it can be applied regardless of the surface condition of the bottom plate. However, there is a disadvantage that the repair work is difficult and the adhesion with the bridge deck is insufficient. Recently, however, the shortcomings of the sheet-based waterproofing agent have been compensated by new methods of reinforcing the glass fibers in the sheet-based system to enhance strength and adhesion.

Third, pavement waterproofing is generally used as goose asphalt, and mastic asphalt is also used in the United Kingdom and Europe. Mainly applied to the steel bottom plate, there is an advantage to obtain an effective waterproof for the joint portion of the bottom plate.

Fourth, the coating-based waterproofing agent has the advantage that it can be easily applied during repair work, and excellent waterproofing effect because of excellent adhesion to the bridge deck. However, there is a disadvantage in that the adhesive strength with the packaging layer is insufficient. In order to solve this problem, by spraying the silica sand on the waterproof layer to improve the adhesion strength with the asphalt layer. Coating-based waterproofing agents can be classified into synthetic rubber coatings, asphalt coatings and epoxy resin coatings. Among them, the epoxy resin coating-based waterproofing agent has excellent adhesiveness to concrete, but there is a problem in that the asphalt mixture must be laid within the pot life of the resin in order to secure the adhesiveness with the asphalt pavement.

Regarding the bridge waterproofing method, conventional bridge waterproofing methods include a complete waterproofing method, a rubber-based coating waterproofing method, an asphalt sheet waterproofing method, and a rubberized asphalt method.

Complete waterproofing method has a problem that the waterproof function is disabled in the process or crack generation has been used for a long time, rubberized asphalt method is used as a non-exposure waterproofing, but there is a problem in weather resistance due to severe aging phenomenon. Although the waterproofing methods were generally excellent in waterproofing performance, the concrete layer-waterproofing layer-ascon layer was not integrated, so there was a problem in adhesion and peeling phenomenon occurred. In order to solve this problem, by attaching silica sand or aggregate, it made irregularities to improve the adhesiveness with ascon.However, as the temperature rises in summer, the waterproof layer increases, and the silica sand fixing the ascon layer and the waterproof layer is separated from the ascon layer. Since it is pushed out, there is a problem that cracks and irregularities are generated on the asphalt concrete floor.

The present invention is to solve the above problems, an object of the present invention is to provide a bridge waterproofing composition of a bridge or concrete structure to enhance the flexibility, heat resistance, chemical resistance, adhesion, weather resistance to prevent the peeling phenomenon. .

In addition, by impregnating the glass fiber roving cloth (Roving Cloth) in the cross-linking waterproof composition reinforced concrete method-concrete layer-waterproof layer-ascon layer is integrally bonded to the complete adhesion waterproofing method that increases the waterproof performance and cracks and irregularities do not occur The purpose is to achieve this.

The present invention is to solve the above problems, the cross-linking waterproof composition of the bridge or concrete component according to the present invention includes an epoxy resin, a urethane-based epoxy resin, tar, a curing agent.

Here, the epoxy resin preferably contains 30 to 60 parts by weight of phenol noblock epoxy resin and 15 to 35 parts by weight of dimer fatty acid modified type epoxy resin with respect to bisphenol epoxy resin and 100 parts by weight of the bisphenol epoxy resin. Do.

In addition, the urethane-based epoxy resin is made of an isocyanate-modified epoxy resin, the isocyanate-modified epoxy resin is preferably 15 to 35 parts by weight based on 100 parts by weight of the epoxy resin in the bisphenol,

The tar (tar) comprises a purified coal tar (Coaltar), the purified coal tar (Coaltar) is preferably 100 to 130 parts by weight based on 100 parts by weight of the bisphenol epoxy resin.

And the curing agent comprises at least one of polyamide-modified polyamine or polyamide, at least one of the polyamide-modified polyamine or polyamide is preferably 40 to 70 parts by weight based on 100 parts by weight of the bisphenol epoxy resin. .

Next, the bridge waterproofing method using the bridge waterproof composition of the bridge or concrete structure of the present invention,

Painting work step of coating alkali-resistant epoxy primer on the concrete surface; After the painting operation step, the first waterproofing film generating step of impregnating 2 to 4 kg / ㎡ of the cross-sectional waterproofing composition in 0.1 to 1.0 kg / ㎡ of glass fiber roving cloth (laving cloth); And an adhesion force promoting step of spraying silica sand (SiO ₂ ) on the waterproof membrane.

A second waterproofing film generating step of coating by applying 0.2 to 0.8 kg / m 2 of the crosslinking waterproofing composition after the adhesion promoting step; And bonding the waterproofing layer to the ascon layer by pouring the ascon at the same time as the second waterproofing film generating step.

Bridge waterproof composition of the bridge or concrete structure according to the present invention is excellent in adhesiveness, so that the concrete-waterproof layer-ascon layer is integrated, there is no crack generation, it is possible to solve the problem of unevenness caused by peeling off.

In addition, since the composition contains phenolic noblock epoxy resin, it has excellent chemical resistance and heat resistance, so that the waterproofing agent does not oxidize in the winter snow chloride or concrete alkaline properties, and ascon casting does not foam or oxidize even when the temperature of ascon is higher than 180 ℃. There is no advantage.

In addition, the laminated waterproof method impregnated with the glass fiber roving cross in the composition has increased acid resistance and weather resistance compared to the conventional crosslinked waterproofing method, and the entire floor is integrated to maintain a complete waterproof layer, thereby extending the waterproof performance maintenance life, and ascon pouring. At the same time, it is possible to shorten the construction period, so it is possible to improve the economic efficiency.

Hereinafter, the bridge waterproof composition of the bridge or concrete structure according to the present invention will be described.

The bridge waterproof composition of a bridge or concrete structure basically comprises an epoxy resin, a urethane-based epoxy resin, a tar, a hardener.

First, the properties of the epoxy resin components, the role and the content of the cross-linking composition of the bridge or concrete structure of the present invention will be examined.

The epoxy resin is composed of a bisphenol epoxy resin, a phenol noblock epoxy resin, and a reactive plastic resin.

First, the bisphenol epoxy resin will be described.

Bisphenol A type epoxy resins are mainly used, and bisphenol F type epoxy resins can be appropriately mixed with them.

The bisphenol A-type epoxy resin used in the waterproof epoxy resin composition plays a role in which the curing agent of the epoxy composition expresses the adhesive strength and strength with the concrete structure or the steel structure, and is excellent in reactivity, adhesion, and toughness. The bisphenol F-type epoxy resin is excellent in adhesion and compatibility with other resins, and is mixed here to supplement the physical properties of the bisphenol A-type epoxy resin, and serves to allow the epoxy to be smoothly coated on the concrete surface. In addition, the bisphenol epoxy resin is preferably equivalent to 150 to 300, the viscosity is preferably 8,000 to 11,000 CPS (Centi Poise).

Secondly, the phenol noblock epoxy resin will be described.

In the waterproofing of concrete structures, concrete has a pH (acidity) of about 12, and since it is strongly alkaline, a waterproofing agent is needed for alkali, but the existing rubberized waterproofing agent has severe aging phenomenon for alkali. The phenolic noblel epoxy resin is mainly attracting attention in the field of electronic and electrical, and thus has excellent chemical resistance and heat resistance, and thus has excellent alkali resistance, thereby preventing oxidation or aging and thus being employed in the present invention.

In addition, asphalt concrete (hereinafter referred to as 'ascon') in the ascon is heated to more than 180 ℃ as the heat-resistant product is low swelling or foaming because the waterproofing performance is lowered, it is impossible to use as a waterproofing agent in the present invention, excellent heat resistance Phenolic noblock epoxy resin was adopted. It is preferable that the phenol noblock epoxy resin is equivalent to 150 to 300, and the viscosity is 25,000 to 35,000 CPS.

Third, the reactive plastic resin will be described.

In general, high hardness resins have low shrinkage expansion rate, low flexibility, and are very weak to impact due to cracking or peeling at the concrete interface when warpage due to earthquake or tectonic change occurs. Therefore, when the hardness of the crosslinked waterproofing composition is more than 60 / Shore D, there is little elongation and cracking or peeling occurs due to shrinkage and expansion of concrete.

Therefore, the crosslinked waterproof composition can prevent cracking or peeling when the shrinkage expansion ratio is about the same as that of the concrete and when the compressive strength is 1 to 1.5 times that of the concrete.

In case of the existing waterproof epoxy composition, the shrinkage expansion rate between the epoxy resin composition and the concrete is different, causing peeling, or even after adjusting the shrinkage expansion rate by using an additive such as a diluent to the curing agent, As a result of this flow, the fluidity (shrinkage expansion) is lost, and the seismic resistance and the impact resistance are weak.

Through several experiments, it has been found that when the reactive plastic resin is employed, the composition can be softened and maintained for such a long time to prevent seismic characteristics or fatigue due to impact. Hereinafter, the kind and role of the reactive plasticizer will be examined.

First, the types of general plasticizers include phthalic acid, trimellitic acid, phosphite, epoxy, polyester, aliphatic, and anti-chlorine based on their chemical structure. phthalate plasticizers such as di-2-ethlhexy) and DBP (di-butyl-phthalate). In the present invention, phthalic acid is DOM (Dioctylmaleate), epoxy or polyester plasticizer. Among these, epoxy- and polyester-based reactive plasticizers are preferably used. More preferably, a dimer fatty acid modified type epoxy resin, which is a plasticizer prepared by polymerizing a dimer fatty acid and an epoxy resin, is used as a composite having a slow aging and excellent durability.

The role of the reactive plasticizer is to control the shrinkage and expansion rate of the composition as described above to prevent the plasticizer from being solidified to harden as it flows out over time to reduce the waterproofing performance, and serves as a retarder to prevent the composition from hardening quickly.

Fourth, the component content of the epoxy resins will be described.

First, it is preferable to add 30-60 weight part of phenol noblock epoxy resins with respect to 100 weight part of bisphenol epoxy resins. If it is added less than 30 parts by weight it is difficult to ensure the alkali resistance characteristics, when added in excess of 60 parts by weight because there is a problem that workability deteriorates.

In addition, it is preferable to add 15-35 weight part of dimer fatty acid modified type epoxy resin with respect to 100 weight part of bisphenol epoxy resins. This is because, when added in less than 15 parts by weight, the desired shrinkage expansion ratio cannot be obtained, and when added in excess of 35 parts by weight, the compressive strength may be greatly reduced.

Next, the properties of the constituents of the urethane-based epoxy resin in the bridge waterproof composition of the bridge or concrete structure of the present invention will be examined each of the significance of the content.

The urethane-based epoxy resin is made of an isocyanate-modified epoxy resin, and in the case of the crosslinked waterproof composition, since the impact is severe due to the vehicle movement and the impact resistance should be good, it is necessary to impart resilience. Therefore, in the present invention, a urethane-based epoxy resin having excellent elasticity is used to impart resilience, thereby increasing impact resistance, thereby significantly reducing cracking and extending service life.

In addition, the content of the isocyanate-modified epoxy resin is preferably added 15 to 35 parts by weight based on 100 parts by weight of the bisphenol epoxy resin. If it is added less than 15 parts by weight, the desired impact resistance can not be obtained, and when added in excess of 35 parts by weight may cause a problem that the compressive strength, bending strength is greatly reduced.

Next, the properties of the constituents of the tar (tar) in the bridge waterproof composition of the bridge or concrete structure of the present invention will be examined each of the significance of the content. The tar (tar) comprises a refined Coaltar (Coaltar), the existing rubber-modified asphalt-based waterproof uses an asphalt adhesive, but the initial adhesion is good, but the adhesion is degraded over time peeling phenomenon In addition, when the temperature increases in summer, the asphalt concrete absorbs geothermal heat and transfers it to the waterproof layer, so that the peeling phenomenon is more easily generated due to the soft and soft waterproof layer. Therefore, in the present invention, by using a tablet Coaltar (Coaltar) excellent in adhesion with ascone, and strengthened the softening resistance, this did not occur peeling phenomenon.

In addition, the content of coaltar (Coaltar) is preferably added to 100 to 130 parts by weight based on 100 parts by weight of bisphenol epoxy resin. This is because when the addition amount is less than 100 parts by weight, the desired adhesion cannot be obtained, and when the amount is added more than 130 parts by weight, the strength of the waterproof layer may decrease.

Finally, each of the significance of the nature, role and content of the constituents of the curing agent in the bridge waterproof composition of the present bridge or concrete structure.

Epoxy resins are rarely used alone, and are generally used in combination with a curing agent and cured with a three-dimensional thermosetting material. The performance of the epoxy resin is largely determined by the curing agent.

The curing agent is obtained by mixing at least one of an aliphatic amine curing agent, a substituted amine curing agent, an aromatic amine curing agent, an acid anhydride curing agent and an amidazole curing agent. The hardening | curing agent in the preferable experimental example of this invention mentioned later used the polyamide modified polyamine containing polyamine which is resistant to alkali and an acid as a main hardening | curing agent.

In addition, it is preferable that content of a hardening | curing agent adds 40-70 weight part with respect to 100 weight part of bisphenol epoxy resins. This is because when added in an amount of less than 40 parts by weight, the curing property is lowered.

Hereinafter, a bridge waterproofing method using the bridge waterproof composition of a bridge or concrete structure according to the present invention will be described with reference to the drawings.

1 is a flow chart sequentially showing an embodiment of the cross-linking waterproofing method according to the present invention, Figure 2 is a cross-sectional view showing the structure of the cross-linking waterproofing layer according to an embodiment of the present invention.

As shown in Figure 1, the embodiment of the bridge waterproofing method according to the present invention, the primer coating step (S10); Generating a first waterproofing film (S20); Adhesion force step (S30); Generating a second waterproofing film (S40); It comprises a bonding step (S50).

In addition, as shown in Figure 2, the structure of the cross-linking waterproof layer 100 formed by the cross-linking waterproofing method according to an embodiment of the present invention is an epoxy primer layer (10); The first waterproofing layer 20; Glass fiber impregnated laminate 30; It comprises a second waterproof layer 40.

Primer coating step (S10) is a step of coating the alkali-resistant epoxy primer on the concrete surface. The epoxy primer layer 10 was composed of a primer layer by applying an epoxy having alkali resistance so as not to be oxidized by the concrete property having a strong alkalinity. The epoxy primer layer 10 is preferably coated with 0.1 to 0.5 kg / ㎡. Conventionally, the urethane used as the primer layer penetrates the water due to its permeability and breathability, so that the problem of water soaking must be solved only by good selling, and as the primer layer 10 in the present invention, Epoxy was applied.

In addition, the properties required for the primer include chemical resistance, adhesiveness, and moisture resistance, but the material of the epoxy resin in the epoxy primer used in the present invention is preferably bisphenol A or no-block type epoxy resin alone. Alternatively, by using a mixture made of all three of the above characteristics, in particular, when using a mixture of bisphenol A-type epoxy resin and noblock type epoxy resin can maximize the chemical resistance.

The first waterproof film generation step (S20) is a step of impregnating the crosslinked waterproofing composition and the glass fiber roving cloth (Laving Cloth) after 2 to 8 hours of primer work and laminating. This is produced by painting the first waterproof layer 20 with the crosslinking waterproofing composition, and the glass fiber impregnating layer 30 impregnating the crosslinking waterproofing composition in a glass fiber roving cloth and laminating work. It is made by including the step.

In the first waterproofing film generating step (S20), the crosslinked waterproofing composition may include 2 to 4 kg / m 2, and glass fiber roving cloth to include 0.1 to 1.0 kg / m 2. When the crosslinked waterproofing composition is included in less than 2kg / ㎡, properties such as adhesiveness, chemical resistance, heat resistance, etc. are inferior, and when included in excess of 4kg / ㎡, the waterproof membrane is too thick, the impact resistance of the cross-linking falls, concrete This is because the adhesion between the layer-waterproof layer-ascon layer may cause problems of peeling and cracking. And glass fiber roving cloth (Roving Cloth) is because it is effective to increase the adhesiveness and waterproof performance of the entire waterproof layer containing 0.1kg / ㎡ to 1.0kg / ㎡, which is a ratio of 5 to 25% of the crosslinking waterproof composition.

In addition, the glass fiber roving cloth (Roving Cloth) is a product, such as a foldable fabric is woven using a roving (Roving), can be used with most thermosetting resins, and can be produced in a variety of weights and widths. It is mainly used in large molded products and has the characteristic of giving high strength. Therefore, in the first waterproofing film generating step (S20) of the present invention, the glass fiber roving cloth is increased in order to increase the strength of the waterproofing layer, and to integrate the concrete layer-waterproofing layer-ascon layer to increase the waterproofing performance. Adopted.

Adhesion enhancement step (S30) is a step of promoting the adhesion with the asphalt concrete layer by spraying 1 to 3kg / ㎡ of silica sand (SiO ₂ ) of 2 to 5mm in diameter on the glass fiber impregnated laminate (30).

The second waterproofing film generating step (S40) is a step of applying the crosslinked waterproofing composition with an aqueous roller or spraying with an airless coating. In the second waterproofing film forming step (S40), the crosslinked waterproofing composition is preferably coated with 0.2 to 0.8 kg / m 2. This is made at the same time as the bonding step (S50), and the purpose of helping to fully bond the waterproof layer and the ascon layer to increase the waterproof performance, the cross-waterproof at the rate of 10 to 20% of the first waterproofing film forming step (S20) This is because it is effective to apply the composition.

Bonding step (S50) is a step of bonding the waterproof layer and the ascon layer by pouring ascon at the same time as the second waterproof film generation step (S40). Unlike existing bridge waterproofing method, it is possible to work simultaneously with ascon pouring, which can shorten the construction period, and concrete-waterproof-ascon layer is integrated so that it has adhesive strength of 50kg / ㎡ or more by perfect adhesion of waterproof layer and ascon layer. Therefore, it is possible to solve the problem of exfoliation and the ascon layer being pushed out or irregularities.

Next, an embodiment and a comparative example in which the physical properties of the bridge waterproofing composition of the bridge or concrete structure and the bridge waterproofing method using the same will be described.

Evaluation of the bridge waterproof composition is examined for adhesion, hardness, crack resistance of the waterproof layer, heat resistance, and alkali resistance.

In the evaluation of adhesion, it is preferable to use a resin having excellent adhesion since the concrete-waterproof layer-ascon layer needs to be integrated in order to maintain the complete waterproof layer and maintain the waterproof life for a long time.

Evaluation of alkali resistance is directly related to whether or not it can withstand concrete having strong alkyl resistance, and primers that are weak in alkalinity may cause aging due to alkalinity, and therefore, it is preferable to use a resin having excellent alkali resistance.

Hardness and waterproof layer crack resistance evaluation is generally weak in shrinkage expansion rate and low flexibility, because of the low flexibility, if the warpage due to earthquakes, cracks or peeling phenomenon at the concrete interface is very weak to impact, It is preferable that the crosslink waterproof composition has a shrinkage expansion ratio of about the same as that of concrete and a compressive strength of 1 to 1.5 times that of the concrete.

As for heat resistance evaluation, ascon heats 180 ℃ or more during ascon pouring work, and the product having low heat resistance swells or foams and the waterproof performance decreases. Therefore, it is preferable to use a resin having excellent heat resistance.

The evaluation method of the experimental example of this invention is as follows.

(Adhesiveness)

A waterproof layer is formed on the concrete surface of the wet and dry surfaces, and some samples of the concrete-waterproof layer are taken, irradiated with ultraviolet rays for 5 days in the drying rack, and examined for peeling phenomenon due to poor adhesion. It was.

When the adhesiveness was maintained for 3 days or more, it was good when the above characteristics were maintained for 2 days or more, and when the above characteristics were maintained for 1 to 2 days, in general, defects occurred within 1 day were regarded as defective.

(Hardness)

Hardness tests were performed according to ASTM D 2240 via durometer hardness (Type D).

(Is there a crack?)

Cracks generated through chemical resistance, adhesion strength, and compressive strength tests were visually inspected.

(Chemical resistance)

The crosslinked waterproofing composition of the present invention was deposited on 10% sulfuric acid and 10% hydrochloric acid solution to measure acid resistance and alkali resistance by dipping on 10% caustic soda solution. Was examined.

(Compressive strength)

It was measured by a universal testing machine according to the KS M 3015 test method.

(Adhesive strength)

After 5 days at 23 ° C. by adhering the bridge structure to the concrete structure, the bond strength was tested through a pull-off test based on uniaxial tension.

(Concrete and neutralization reaction)

The concrete-water-proof layer sample used in the adhesion evaluation was immersed in a bath soaked in water, and irradiated with ultraviolet rays for 5 days, and then examined for peeling phenomenon.

(Waterproof performance)

Water was poured on each of the waterproof layers, and when pressure was applied for 1 day, the presence of water was examined.

(Keep waterproof performance)

After performing the same experiment as the adhesion test, it was evaluated whether the waterproof performance maintained by whether cracks in the waterproof layer after 5 days.

Water resistance  Composition Experimental Example

The bisphenol epoxy resin has an equivalent weight of 180 g / eq, a viscosity of 8,000 to 11,000 CPS at 25 ° C, the noblock epoxy resin has an equivalent weight of 180 g / eq, a viscosity of 30,000 CPS at 25 ° C, and the plastic resin has a dimer fatty acid (Dimer Fatty). Acid) Modified type epoxy resin, urethane-based epoxy resin is isocyanate-modified epoxy resin, refined coal is refined coal (Coaltar), modified polyamine was used as a curing agent. In this experiment, the addition ratio of each material was changed in order to find a composition having an optimal cross-waterproof condition, and the adhesion, hardness, crack resistance, heat resistance, and alkali resistance of the prepared cross-waterproof composition were tested. The experimental results are shown in Table 1.

TABLE 1

division unit Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Bisphenol Epoxy Resin Parts by weight 100 100 100 100 100 100 100 Noblock Epoxy Resin Parts by weight 34 43 57 0 25 28 45 Plastic resin Parts by weight 16 27 33 0 0 14 45 Urethane Epoxy Resin Parts by weight 16 27 33 0 0 0 20 Refined tar Parts by weight 100 121 130 70 86 95 123 Modified polyamines Parts by weight 43 51 57 30 37 42 53 Adhesive kg / ㎠ 127 110 96 112 118 99 83 Elongation % 30 35 44 11 8 20 60 Compressive strength kg / ㎠ 360 325 295 520 550 350 200 The tensile strength kg / ㎠ 200 145 110 250 265 180 90 Flexural strength kg / ㎠ 230 217 175 350 370 210 140 Permeability none none none none none none none Hardness Shore d 58 52 50 62 63 53 41 Waterproof layer crack resistance fitness fitness fitness incongruity incongruity incongruity incongruity Heat resistance fitness fitness fitness incongruity fitness fitness incongruity Alkali resistance fitness fitness fitness fitness fitness fitness incongruity

As shown in Table 1, all of bisphenol epoxy resin, phenol noble epoxy resin, dimer fatty acid modified type epoxy resin, isocyanate modified epoxy resin, purified coaltar, polyamide modified polyamine, and the like When the content is the same as in Examples 1, 2, and 3, the adhesiveness, hardness, water resistance, crack resistance and alkali resistance were generally excellent or good. I could see that.

Water resistance  Method Experimental Example

Next, in order to examine whether or not cracking of asphalt road surface, maintaining the waterproof performance, etc. Examples A and Comparative Examples B to E, respectively, glass fiber lamination method (3mm thickness) and the existing using the bridge waterproof composition of the present invention The waterproof layer is formed by the complete waterproof method (10mm thickness), rubberized film coating method (3mm thickness), rubberized asphalt coating film method (3mm thickness) and rubberized asphalt glass fiber laminating method (5-7mm thickness). , Maintenance of waterproof performance, concrete and neutralization reaction, crack of asphalt concrete, crack of asphalt concrete, irregularities of asphalt concrete, peeling of asphalt concrete, shear stress absorption, shortening construction period, concrete pressure suppression I looked at it.

In the above experiments, the coating film waterproofing method was used. Based on the difference between the waterproofing agent and the waterproofing method, each waterproofing performance and characteristics were examined.

Comparative Example E is a waterproof method for applying cement to the bridge by combining the cement and the complete liquid waterproofing agent, Comparative Example D is a waterproof method for applying a synthetic rubber waterproofing agent to the bridge, Comparative Example C is a rubber mixed asphalt waterproofing agent is heated to the bridge, It is a waterproofing method to melt and apply, Comparative Example B is a waterproofing method of laminating a rubber mixed asphalt waterproofing agent to glass fiber, there is a difference in the components and performance of the waterproofing agent with Example A, Example A is a strong Based on the adhesive strength, impregnated lamination using glass fiber Roving Cloth, and the waterproofing method of coating the present invention on it again and pouring ascon at the same time due to the waterproof method and the waterproofing performance and economical efficiency with the above comparative example Showed a difference.

The experimental results are shown in Table 2.

TABLE 2

Experiment item Example  A Comparative Example B Comparative Example C  Comparative Example D Comparative Example E  Method Invention Water bridge composition Glass fiber lamination method (3 mm  thickness) Rubberized asphalt glass fiber lamination method (5 ~ 7mm thickness) Rubberized asphalt coating method (3mm thickness) Rubberized film coating method (3mm thickness) Complete waterproof method (10mm thickness) Crack occurrence of asphalt road ◎ ○ △ △ × Ascon layer is pushed out ◎ ○ △ × × Unevenness of Ascon Road ◎ ○ ○ × × Possibility to maintain waterproof performance for more than 5 years ◎ ◎ ○ △ △ Whether shear stress is absorbed when moving a heavy vehicle ○ ◎ ◎ △ × Whether construction time is shortened by ascon simultaneous work ○ ○ ○ ○ × Neutralization of Waterproofing Agent and Concrete ◎ △ △ △ ◎ Repellent And Concrete Adhesive ◎ ○ △ △ ◎ Whether the waterproofing agent suppresses the concrete internal pressure ◎  ○  ○  ×  ◎

◎: excellent, ○: good, △: normal, Ｘ: poor

As shown in Table 2, in the case of Example A using the crosslinked waterproofing composition and the glass fiber lamination method according to the present invention, the likelihood of ascon cracking, peeling phenomenon, whether the waterproof performance is maintained for more than 5 years, concrete and waterproofing agent In the adhesiveness and the like, both showed excellent or good characteristics, it was found that it is the most ideal crosslinking waterproofing method compared to the conventional crosslinking waterproofing method.

As mentioned above, the structure of this invention was demonstrated in detail with reference to an experimental example. However, the scope of the present invention is not limited to the above experimental examples, and may be embodied in various forms of experimental examples within the scope of the appended claims. Without departing from the gist of the invention as claimed in the claims, it is intended that such modifications can be made by anyone of ordinary skill in the art to be within the scope of the claims.

1 is a flow chart sequentially showing an embodiment of the cross-section waterproofing method according to the present invention

Figure 2 is a cross-sectional view showing the structure of the bridge waterproof layer according to an embodiment of the present invention

<Description of the symbols for the main parts of the drawings>

100: bridge waterproof layer

10: epoxy primer layer

20: primary waterproof layer

30: glass fiber impregnated laminate

40: second waterproof layer

A: concrete bridge

B: Ascon Layer

Claims (10)

delete delete delete delete In the bridge waterproofing method using the bridge waterproof composition of the bridge or concrete structure, Painting work step of coating alkali-resistant epoxy primer on the concrete surface; After the painting operation step, the first waterproofing film generating step of impregnating a cross-waterproof composition comprising an epoxy resin, a urethane-based epoxy resin, tar, a curing agent to the glass fiber and laminating work; Bridge adhesion method using the bridge waterproof composition of the bridge or concrete structure, characterized in that it comprises; a step of promoting adhesion to spray the silica sand (SiO ₂ ) on the waterproof membrane. The method of claim 5, A second waterproofing film generating step of coating by applying the crosslinking waterproofing composition of claim 5 after the adhesion promoting step; A bridge waterproof method using the bridge waterproof composition of the bridge or concrete structure further comprises a; bonding step of bonding the ascon layer to the waterproof layer by pouring ascon at the same time as the second waterproof film generation step. The method according to claim 5 or 6, The epoxy resin in the crosslinking waterproof composition includes 30 to 60 parts by weight of a phenol noblock epoxy resin, and 15 to 35 parts by weight of a dimer fatty acid (Dimer Fatty Acid) modified type epoxy resin based on a bisphenol epoxy resin and 100 parts by weight of the bisphenol epoxy resin. , The urethane-based epoxy resin comprises an isocyanate-modified epoxy resin, the isocyanate-modified epoxy resin is 15 to 35 parts by weight based on 100 parts by weight of the bisphenol epoxy resin, The tar (tar) comprises a refined coaltar (Coaltar), the purified coaltar (Coaltar) is 100 to 130 parts by weight based on 100 parts by weight of the bisphenol epoxy resin, The curing agent comprises at least one of polyamide-modified polyamine or polyamide, and at least one of the polyamide-modified polyamine or polyamide is 40 to 70 parts by weight based on 100 parts by weight of the bisphenol epoxy resin. Or bridge waterproof method using the bridge waterproof composition of the concrete structure. The method of claim 5, The bridge waterproofing method using the bridge waterproofing composition of the bridge or concrete structure, characterized in that the cross-linking waterproof composition is 2 to 4 kg / ㎡, glass fiber is impregnated 0.1 to 1.0 kg / ㎡ in the first waterproofing film production step. The method of claim 5, In the first waterproofing film generating step, the glass fiber is a crosslinking waterproofing method using the crosslinking waterproof composition of the bridge or concrete structure, characterized in that the Roving cloth (Roving Cloth). The method of claim 6, The bridge waterproofing method using the bridge waterproofing composition of the bridge or concrete structure, characterized in that the cross-linking waterproofing composition in the second waterproofing film production step is 0.2 to 0.8 kg / ㎡.

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