KR102438751B1 - High durability polymer concrete composition for repairing expansion joints and bridge surface pavement and repair method using the same - Google Patents

Abstract

The present invention relates to a high-durability polymer concrete composition for repairing post-concrete of expansion joints and bridge surface pavement to ensure the quality of concrete cast on a site constantly, and a repair method using the same. More specifically, the repair method comprises a step of, in a product containing a high-durability polymer concrete composition for repairing post-concrete of expansion joints and bridge surface pavement, coating and curing a mixture, in which coarse aggregate pre-packed together with pre-mixed post-concrete composition and fine aggregate is mixed with measured water, on a bridge or road.

Description

High durability polymer concrete composition for repairing expansion joints and bridge surface pavement and repair method using the same}

The present invention is an expansion joint with excellent salt decomposition resistance including strong basic anion exchange resin, which improves crack resistance by improving ductility and deformability by irregularly dispersing discontinuous fibrous material in concrete composition using super-velocity cement. The present invention relates to a high-durability polymer concrete composition for futa repair and bridge pavement repair and a construction method using the same.

In general, bridge expansion joints smoothly accommodate the displacement and deformation of the superstructure to minimize the occurrence of secondary stress and allow the vehicle to safely travel on the bridge. It is a device that plays a role such as preventing corrosion of concrete.

Since the bridge expansion joint device as described above is exposed on the surface of the bridge, it is easy to damage due to friction and impact caused by passing vehicles. It is a bridge element that is unavoidable for maintenance during its proper lifespan.

Among the repair work of the bridge expansion joint, especially in the case of urgent need such as construction on a highway, super-velocity cement is used for early strength development. Despite the advantage of fast strength development, super-velocity cement has a disadvantage in that a large amount of cracks occur in the early stage due to the high heat of hydration. As a result, when performing bridge expansion joint repair work using super-velocity cement, the durability deteriorates due to cracks in the concrete and the maintenance cost increases. Therefore, it is required to develop a high-performance concrete composition capable of suppressing cracking while exhibiting strength at an early stage so as to be suitable for urgent construction such as bridge expansion joint repair work.

In addition, in the conventional post-repair repair method, the vehicle is controlled, chipping is performed to remove the damaged part, the existing rebar is cut, and the new rebar is assembled. was made with

On the other hand, since concrete is in an alkaline state with a pH ranging from 12.0 to 13.0, a protective film of a passive film is formed around the reinforcing bar to suppress corrosion of reinforcing bars. However, when more than a certain amount of Cl ^- ions or acid anions exist inside the concrete due to the external environment of the concrete structure and the cause of the concrete structure itself, the passivation film around the reinforcing bar is destroyed, and the rebar is easily corroded.

Cl ^- ions compete with oxygen (O ₂ ) or hydroxyl ions (OH-) to form Fe ²⁺ and form FeCl ₂ . These compounds diffuse from the anode, destroying the protective layer of Fe(OH) ₂ and allowing the electrochemical corrosion reaction to continue.

Therefore, when the reinforcing bar inside the concrete is corroded, the cross section of the rebar itself is lost and the overall strength of the structure is lowered. As the supply becomes smooth, the corrosion of the reinforcing bars is accelerated quickly, and eventually the covered concrete falls off and the performance of the building structure is significantly reduced. Due to the nature of the super-velocity concrete used together with reinforcing bars and steel members, it should be ensured that the rebars are not damaged by salt.

It is known that chloride penetration into the concrete is caused by the penetration and diffusion of chloride through continuous capillary pores of cement paste, pores in the aggregate-paste transition region, and microcracks inside the aggregate. Such penetration of chlorine ions into the concrete causes corrosion by destroying the passivation film of the reinforcing bars in the concrete. It will act as a factor to shorten the durable life of In addition, in the case of unrooted concrete, it is reported that the change in the properties of concrete due to chloride ion penetration is insignificant. This causes a problem of shortening the durability life of concrete structures and products by acting as a factor that increases the

Therefore, there is a need for research on the after-material composition for crack-reducing expansion joints with excellent salt resistance and durability.

Republic of Korea Patent Registration No. 10-1739778

Expansion joints play a major role in the durability and stability of bridges. In particular, as the section where stress is the most concentrated, technology related to expansion joints continues to occur, but cracks and pop-out phenomena continue to occur in the pouring part of the second concrete due to the low crack resistance performance of concrete. In fact, the damage of the futa-bu concrete can threaten the safety performance of the entire bridge as well as damage to the expansion joints. In addition, the part that needs to be constructed after concrete is a structure in common use, and when it is damaged or dropped, it can cause great damage to the vehicle while driving, and furthermore, it can lead to personal injury. Therefore, in the present invention, the durability performance is improved by increasing the crack resistance of the concrete for futa used in these expansion joints, and further, by providing a pre-mixed, quantitatively-measured material (in the form of a mix kit), a worker mixes the concrete. Also, by allowing a certain amount of material to be mixed, the purpose is to ensure that the quality of concrete cast on site is constant.

In addition, the present invention is a high-durability polymer concrete composition for post-repair and bridge-surface pavement repair of expansion joints, in which coarse aggregate is pre-packed together with a pre-mixed after-material composition and fine aggregate. The invention relates to a high-durability polymer concrete composition for the rear repair of expansion joints and repair of bridge pavement, a product including the same, and a construction method using the same.

In particular, the present invention uses fibers of different lengths to increase crack resistance to achieve a physical crack suppression effect, and a strong basic anion exchange resin is used to suppress chemical rebar corrosion. It is an invention related to a high-durability polymer concrete composition for futa repair and bridge pavement repair.

In order to solve the above technical problem, the present invention is based on 100% by weight of the total after-treatment composition, coarse cement with a fineness of 4,500 cm ² /g or more or a micro cement of 6,000 cm ² /g or more with a fineness of 40-60% by weight, calcium aluminate (CA), magnesium aluminate (MA), calcium sulfoaluminate (CSA), magnesium sulfoaluminate (MSA) comprising a fast-setting composition comprising 20 to 50% by weight of one or a mixture of two or more, 5-20 wt% of a gypsum composition in which one or two or more of high, hemihydrate gypsum, and anhydrite are mixed, one of chloride, carbonate, sulfate, and oxalate containing active polyvalent metal ions of calcium, magnesium, manganese, and aluminum 0.01-1.0 wt% of an active accelerator composition in which two or more species are mixed, 0.01-1.0 wt% of a curing accelerator in which one or two or more of lithium carbonate, lithium sulfate, and lithium hydroxide are mixed, naphthalene sulfonate, melamine sulfonate , 0.01 to 1.0 wt% of one or more dispersants in polycarbonate, 0.01 to 1.0 wt% of a retarder composition in which one or two or more of citric acid, gluconic acid, and tartaric acid are mixed, Styrene monomer and divinyl Performance improving material containing a porous type strongly basic anion exchange resin in which one of the exchangers of trimethylamine (TMA) and dimethylethanolamine (DMEA) is bonded to the main chain of the copolymer of benzene (Divinyl Benzene) 0.01 to 10 and microfibers having an average length of 5 to 10 mm, an average diameter of 7 to 30 μm, and an average length of 12 to 60 mm and an average diameter of 0.2 to microfibers comprising at least one of PVA, nylon, PE and PP to 0.8 mm, and high-durability polymer concrete for post-repair and bridge pavement repair of expansion joints containing 0.01 to 5% by weight of mixed fibers mixed with macro fibers including at least one of PVA, nylon, PE and PP A composition is provided.

In the mixed fiber, the micro fiber and the macro fiber are mixed in a ratio of 1:1 to 1:2 by volume.

The strongly basic anion exchange resin has an average particle diameter of 0.5 to 0.6 mm, a ratio of D50 to D90 in a particle size distribution curve (D50/D90) of 1.1 or less, and a crosslinking degree of 8 to 10%.

The performance improving material further includes potassium thiocyanate, and is characterized in that it comprises 0.01 to 1.0% by weight based on 100% by weight of the total after-treatment composition.

According to another embodiment of the present invention, 100 parts by weight to 300 parts by weight of fine aggregates are pre-mixed with respect to 100 parts by weight of the latter material composition and 100 parts by weight of the latter material composition, and 200 parts by weight based on 100 parts by weight of the latter material composition. To 400 parts by weight of coarse aggregate is pre-packed together with the pre-mixed post-mixed material composition and fine aggregate. A product comprising the composition is provided.

According to another embodiment of the present invention, the step of removing the deteriorated portion of the concrete after expansion joint expansion and performing a planarization operation; Applying a primer to the area where the concrete after the expansion joint is poured; And in a product comprising a high-durability polymer concrete composition for post-repair and bridge-surface pavement repair of the expansion joint, the pre-mixed post-mix composition, fine aggregate, and metered coarse aggregate are mixed with metered mixed water It provides a construction method using a high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge surface pavement, comprising the step of installing and curing the rear part of the expansion joint.

The fine aggregate comprises 100 parts by weight to 300 parts by weight based on 100 parts by weight of the after-thickening material composition, and the coarse aggregate is characterized in that it comprises 200 parts by weight to 400 parts by weight based on 100 parts by weight of the latter material composition.

The mixed water is characterized in that it comprises 20 parts by weight to 70 parts by weight based on 100 parts by weight of the after-treatment composition.

The high-durability polymer concrete composition for post-repair and bridge pavement repair of expansion joints according to an embodiment of the present invention is a pre-mixed type of post-mixed material so that it can be used immediately after mixing using only water in the field. It has the advantage of being easy to use as a composition.

In other words, since performance improving agents and shrinkage reducing agents (both powder types) are produced in pre-mix at the factory, a mixing process of measuring and calibrating the moisture content of sand on site, and separately weighing aggregates is required. Since there is no such thing, it is a possible construction method to pour an injection material with a constant quality.

In addition, the high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge surface pavement of the present invention enables rapid repair of the bridge in common by using a fast-hardening binder (super-fast cement), and fibers of different phases are mixed By using it, it is possible to increase the crack resistance and reduce the dropout and peeling due to external fault factors (vibration, impact, temperature change, etc.).

Specifically, as the heterogeneous fibers, any one or more fibers of PVA, nylon, PE and PP may be used, and microfibers having an average length of 5 to 10 mm and an average diameter of 7 to 30 μm, and an average length of 12 to 60 mm, a mixed fiber of macro fiber having an average diameter of 0.2 to 0.8 mm is used, and in the mixed fiber, the micro fiber and macro fiber are mixed in a ratio of 1:1 to 1:2 by volume, so that only a single type of fiber is used It can improve ductility and deformability than

In addition, according to an embodiment of the present invention, any one of trimethylamine (TMA) and dimethylethanolamine (DMEA) in the main chain of the copolymer of styrene monomer and divinyl benzene (Divinyl Benzene) It contains 0.01 to 10 wt% of a performance improving material containing a porous type strong basic anion exchange resin to which an exchanger is bound, and the strongly basic anion exchange resin has an average particle diameter of 0.5 to 0.6 mm, and for D90 in the particle size distribution curve When the ratio of D50 (D50/D90) is 1.1 or less and the crosslinking degree is 8 to 10%, the flame resistance property can be improved.

In particular, when a performance improving material containing a porous type strong basic anion exchange resin is used to improve flame resistance, there is a problem in that the early compressive strength of the cement composition is lowered, but in the present invention, the performance improving material is potassium thiocyanate (Potassium thiocyanate) ), and by including 0.01 to 1.0% by weight with respect to 100% by weight of the total after-treatment material composition, it is possible to provide a concrete composition for post-repair repair excellent in flame resistance while also solving the problem of a decrease in early compressive strength.

In addition, the high-durability polymer concrete composition for post-repair repair of expansion joints and bridge pavement repair of the present invention contains at least one cement among crude steel cement with a fineness of 4,500 cm ² /g or more and micro cement with a fineness of 6,000 cm ² /g or more. Since the fast-hardening composition containing

1 is a process diagram showing a construction method using a high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement of the present invention.

Hereinafter, the present invention will be described in more detail through examples. However, these examples are only for helping the understanding of the present invention, and the scope of the present invention is not limited to these examples in any sense.

The high-durability polymer concrete composition for post-repair and bridge pavement repair of expansion joints according to an embodiment of the present invention is based on 100% by weight of the total after-thickening material composition, crude steel cement with a fineness of 4,500 cm ² /g or more, or a fineness of 6,000 cm ² /g or more of micro cement 40-60 wt%, one or a mixture of two or more of calcium aluminate (CA), magnesium aluminate (MA), calcium sulfoaluminate (CSA), and magnesium sulfoaluminate (MSA) 5-20 wt% of a gypsum composition comprising one or two or more of dihydrate gypsum, hemihydrate gypsum, and anhydrite, including a fast-setting composition comprising 20-50 wt%, calcium, magnesium, manganese, and aluminum activity 0.01 to 1.0 wt% of an activity accelerator composition containing one or more of chloride salt, carbonate, sulfate, and oxalate containing polyvalent metal ions, lithium carbonate, lithium sulfate, lithium hydroxide, or mixture of one or more 0.01 to 1.0 wt% of a hardening accelerator, 0.01 to 1.0 wt% of one or more dispersants among naphthalene sulfonate, melamine sulfonate, and polycarbonate, one or more of citric acid, gluconic acid, and tartaric acid; Composition 0.01 to 1.0% by weight, styrene monomer (Styrene monomer) and divinyl benzene (Divinyl Benzene) to the main chain of the copolymer trimethylamine (Trimethylamine, TMA) and dimethylethanolamine (Dimethylethanolamine, DMEA) any one of the exchanger is bonded 0.01 to 10% by weight of a performance improving material comprising a porous type strong basic anion exchange resin, and an average length of 5 to 10 mm, an average diameter of 7 to 30 μm, and any one or more of PVA, nylon, PE and PP and microfibers having an average length of 12 to 60 mm, an average diameter of 0.2 to 0.8 mm, and 0.01 to 5% by weight of a mixed fiber mixed with macro fibers including any one or more of PVA, nylon, PE and PP. .

In the mixed fiber, the micro fiber and the macro fiber are mixed in a ratio of 1:1 to 1:2 by volume.

In addition, the strongly basic anion exchange resin has an average particle diameter of 0.5 to 0.6 mm, a ratio of D50 to D90 in the particle size distribution curve (D50/D90) of 1.1 or less, and a crosslinking degree of 8 to 10%. .

The high-durability polymer concrete composition for post-repair and bridge pavement repair of expansion joints according to an embodiment of the present invention is based on 100% by weight of the total after-thickening material composition, crude steel cement with a fineness of 4,500 cm ² /g or more, or a fineness of 6,000 cm ² /g or more of micro cement 40-60 wt%, one or a mixture of two or more of calcium aluminate (CA), magnesium aluminate (MA), calcium sulfoaluminate (CSA), and magnesium sulfoaluminate (MSA) It includes a quick-setting composition comprising 20 to 50% by weight.

In the case of the conventional after-material composition, since general cement is used, it takes time to develop strength and implement performance, and there is a problem in that the possibility of occurrence of defects increases.

However, according to one embodiment of the present invention, the high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement is coarse cement with a fineness of 4,500 cm ² /g or more or a micro cement 40 with a fineness of 6,000 cm ² /g or more. By including the quick-setting composition containing ~60% by weight, there is an effect that the performance is rapidly expressed compared to the general cement composition by the expression of strength above the practical strength within 3 to 4 hours, thereby significantly reducing the defect factors.

On the other hand, general cement-based products inevitably undergo volume changes due to self-shrinkage and drying shrinkage during the hardening process after pouring, and excessive volume changes can be a major cause of cracks in concrete.

In order to solve the above problems, the high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement according to an embodiment of the present invention is calcium aluminate (CA), magnesium aluminate as a shrinkage reducing agent or expanding agent. 20 to 50% by weight of one or a mixture of two or more of nitrate (MA), calcium sulfoaluminate (CSA), and magnesium sulfoaluminate (MSA).

The calcium aluminate (CA), magnesium aluminate (MA), calcium sulfoaluminate (CSA) and magnesium sulfoaluminate (MSA) initially generate a hydrate of ettringite to prevent cracking due to drying shrinkage reduction and The hardening body can be densified by reducing the capillary voids.

As described above, it is essential to ensure proper expandability in order to exhibit high-quality construction results, and according to an embodiment of the present invention, calcium aluminate (CA), magnesium aluminate (MA), calcium sulfoaluminate (CSA), By including 20 to 50% by weight of one or a mixture of two or more of magnesium sulfoaluminate (MSA), the effect of reducing shrinkage can be maximized.

When one or a mixture of two or more of calcium aluminate (CA), magnesium aluminate (MA), calcium sulfoaluminate (CSA), and magnesium sulfoaluminate (MSA) is included in an amount of less than 20 wt %, shrinkage is reduced There is a problem that the effect is insignificant, and when it exceeds 50% by weight, a problem of cracking due to excessive expansion may occur.

The high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement according to an embodiment of the present invention is one or two of dihydrate gypsum, hemihydrate gypsum, and anhydrite for the purpose of securing appropriate expandability as described above. It contains 5 to 20 wt% of a gypsum composition in which more than one species is mixed.

The gypsum composition is used to develop initial strength and prevent shrinkage. The gypsum composition produces ettringite by supplying SO ₃ to the fast-setting composition to make the structure of the cement hardened body dense. If the content of the gypsum composition is less than 5% by weight based on 100% by weight of the total filler composition, the strength and cracking inhibitory effect may be weak, and if it exceeds 20% by weight, over-expansion may occur.

On the other hand, the high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement according to an embodiment of the present invention contains chloride, carbonate, sulfate, and active polyvalent metal ions of calcium, magnesium, manganese and aluminum; 0.01 to 1.0% by weight of an activity accelerator composition in which one or two or more of oxalate salts are mixed.

The high-durability polymer concrete composition for post-repair and bridge pavement repair of the expansion joint of the present invention has high fluidity, so if the initial setting rate is long, there is a risk of material separation (bleeding), and if the initial setting rate is short, there is a problem that it is impossible to work .

The high-durability polymer concrete composition for the later repair of the expansion joint and the repair of the bridge pavement is at least one of chloride, carbonate, sulfate, and oxalate containing active polyvalent metal ions of calcium, magnesium, manganese, and aluminum. By including 0.01 to 1.0% by weight of the mixed activity accelerator composition, the initial setting rate can be controlled.

One or two or more of chloride, carbonate, sulfate, and oxalate containing active polyvalent metal ions of calcium, magnesium, manganese, and aluminum in the high-durability polymer concrete composition for the later repair of the expansion joint and the repair of the bridge pavement When the mixed activity accelerator composition is included in an amount of less than 0.01% by weight, an activity-promoting effect cannot be expected, and when it contains more than 10% by weight, reactivity is increased, workability is lowered, and price competitiveness is lowered.

The high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement according to an embodiment of the present invention is a hardening accelerator in which one or two or more of lithium carbonate, lithium sulfate, and lithium hydroxide are mixed 　0.01 to 1.0 weight Including %.

The hardening accelerator serves to influence the strength development by promoting the formation of cement hydrate after setting (termination).

When the high-durability polymer concrete composition for the rear repair of the expansion joint of the present invention and the repair of the bridge pavement contains less than 0.01% by weight of a curing accelerator in which one or two or more of lithium carbonate, lithium sulfate, and lithium hydroxide are mixed It is difficult to expect expression, and if it exceeds 1.0 wt%, cracks may occur due to excessive formation of etrinzite.

High-durability polymer concrete composition for post-repair and bridge pavement repair of expansion joints according to an embodiment of the present invention contains 0.01 to 1.0 wt% of a dispersant of at least one of naphthalene sulfonate, melamine sulfonate, and polycarboxylate do.

The dispersing agent is used to secure workability and fillability by preventing aggregation of particles and increasing fluidity at a low water-cement ratio. %, it is difficult to secure fluidity and fillability, and when it exceeds 1.0 wt%, there is a problem in that rapid hardness and compressive strength are lowered due to excessive fluidity and fillability. do.

The high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement of the present invention is trimethylamine (TMA) and dimethylethanol in the main chain of a copolymer of styrene monomer and divinyl benzene. It contains 0.01 to 10% by weight of a performance improving material containing a porous type strongly basic anion exchange resin to which any one of the exchangers of amine (Dimethylethanolamine, DMEA) is bonded.

In the main chain of the copolymer of styrene monomer and divinyl benzene, which is included in the performance improving material according to the present invention, one of the exchangers of trimethylamine (TMA) and dimethylethanolamine (DMEA) is The bonded porous type strong basic anion exchange resin is a material having a chlorine ion fixing ability to fix chlorine ions inside the resin while releasing anions it has, and is used to improve the flame resistance of the after-treatment composition according to the present invention. .

In general, in a reinforced concrete structure in a high salinity environment, there is a problem in that the reinforcing bars are corroded due to the diffusion of chloride ions and the durability is lowered.

However, in the high-durability polymer concrete composition, the main chain of the copolymer of styrene monomer and divinyl benzene is trimethylamine (TMA) and dimethylethanolamine (DMEA). By including 0.01 to 10 wt% of a performance improving material including a combined porous type strong basic anion exchange resin, it is possible to improve the flame resistance of the second material composition.

In particular, according to one embodiment of the present invention, a porous type strongly basic anion exchange resin in which an exchange group of trimethylamine (TMA) is bonded to the main chain of a copolymer of styrene monomer and divinyl benzene is used. By including, since the fixing ability of chlorine ions is larger, the flame resistance improvement effect may be more excellent. Specifically, the chlorine ion selectivity coefficient of the porous type strongly basic anion exchange resin to which an exchanger of trimethylamine (TMA) is bonded is about 22, and a strong basic anion exchange resin to which an exchanger of dimethylethanolamine (DMEA) is bonded. It can exhibit ion selectivity that is about 10 times greater than the chlorine ion selectivity coefficient of 2.3.

An ion exchange resin is a synthetic resin particle having a functional group, and has the ability to separate by exchanging ions in a solution (ion exchange capacity), so it is used for removal of impurities and separation of useful substances.

Ion exchange resins are made by introducing an exchange group such as a sulfate group and an ammonium group into a three-dimensionally cross-linked polymer matrix. A general polymer matrix is made in the form of a copolymer of Styrene Monomer and DVB Monomer, and the general size is about 0.3 to 1.2 mm.

According to an embodiment of the present invention, the strongly basic anion exchange resin is of a porous type, has an average particle diameter of 0.5 to 0.6 mm, and a ratio of D50 to D90 (D50/D90) in the particle size distribution curve (D50/D90) is 1.1 or less, It is characterized in that the degree of crosslinking is 8 to 10%.

The chemical structure of the porous type ion exchange resin is the same as that of the gel type, but the matrix has a lot of pores on the surface and the specific surface area is much larger than that of the gel type.

The pores of the porous type ion exchange resin are generally called macropores to distinguish them from micropores. Ion exchange is initiated by ion diffusion in the micropores of the ion exchange resin. However, since these micropores shrink and disappear in a dry state or in a non-polar solvent, ion exchange proceeds only on the surface of the ion exchange resin. Therefore, in a dry state or in a non-polar solvent, a gel type ion exchange resin with a small specific surface area loses its practical function, but a porous type ion exchange resin does not lose macropores and has a large specific surface area even in a non-polar solvent, so ion exchange can be performed effectively.

In addition, the porous type ion exchange resin has superior reaction rate and discoloration properties than the gel type, and has high resistance to organic contamination, swelling strength and shrinkage strength.

According to an embodiment of the present invention, the strongly basic anion exchange resin has an average particle diameter of 0.5 to 0.6 mm, and a ratio of D50 to D90 (D50/D90) in the particle size distribution curve (D50/D90) is 1.1 or less.

The strongly basic anion exchange resin has very uniform particles and as a result of uniform reaction, it is physically and chemically very stable, so that stable performance can be expressed even in a harsh environment.

According to one embodiment of the present invention, the strongly basic anion exchange resin is characterized in that the crosslinking degree is 8 to 10%.

The internal structure of the ion exchange resin is a cross-linked three-dimensional structure of flexible polystyrene chains by DVB (Divinylbenzene) at irregular lengths and intervals. The degree of crosslinking varies according to the ratio of DVB to Styrene. When the amount of DVB increases during polymerization, the chain branches in the matrix of the ion exchange resin increase, so that it has a denser network. On the other hand, if the amount of DVB decreases, the density of the network decreases. The degree of crosslinking is also called DVB% and is an important factor that determines the properties of ion exchange resins.

Micropores exist in the ion exchange resin, and ions can be diffused and exchanged therein. The higher the degree of crosslinking, the smaller the micropores and the more difficult it is for ions to diffuse within them. In low-crosslinking ion exchange resins, micropores are large and ion diffusion is easy, but if the degree of crosslinking is too low, it is difficult to use as an ion exchange resin because it is physically and chemically weak. As described above, according to one embodiment of the present invention, since the strongly basic anion exchange resin has a degree of crosslinking of 8 to 10%, an excellent ion diffusion effect and thus a chloride ion fixation effect can be obtained.

A porous type strong basic anion exchange in which any one of the exchange groups of trimethylamine (TMA) and dimethylethanolamine (DMEA) is bonded to the main chain of the copolymer of the styrene monomer and divinyl benzene (Divinyl Benzene) If the content of the performance improving material including the resin exceeds 10% by weight, the flame resistance is improved, but the initial strength expression is insufficient and economical efficiency is lowered, and if it is less than 0.01% by weight, the performance improvement effect is insufficient.

In particular, in the present invention, when a strong basic anion exchange resin is used to improve the flame resistance properties, there is a problem in that the early compressive strength of the cement composition is lowered. That is, when only a strong basic anion exchange resin is used to improve the flame resistance properties, the flame resistance can be improved, but there is a problem in that mechanical properties of cement such as early compressive strength are reduced.

However, the high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement according to an embodiment of the present invention further includes potassium thiocyanate, with respect to 100% by weight of the total after-material composition, By including 0.01 to 1.0% by weight, it is possible to provide a concrete composition for post-repair with excellent flame resistance while also solving the problem of lowering of the early compressive strength. When the latter composition further includes potassium thiocyanate, the early compressive strength may be improved by the hydration reaction promoting effect of C ₃ S by the water-soluble inorganic salt.

When the high-durability polymer concrete composition for the rear repair of the expansion joint of the present invention and the repair of the bridge pavement contains potassium thiocyanate in an amount of less than 0.01% by weight, it is difficult to expect strength development and exceeds 1.0% by weight Cracking may occur due to excessive formation of ethrinzite.

According to an embodiment of the present invention, the high-durability polymer concrete composition has an average length of 5 to 10 mm, an average diameter of 7 to 30 μm, and microfibers comprising at least one of PVA, nylon, PE and PP; It has an average length of 12 to 60 mm, an average diameter of 0.2 to 0.8 mm, and contains 0.01 to 5% by weight of a mixed fiber mixed with macro fibers including at least one of PVA, nylon, PE and PP, and in the mixed fiber The micro fiber and macro fiber are mixed in a ratio of 1:1 to 1:2 by volume.

Expansion joints play a major role in the durability and stability of bridges. In particular, as the section where stress is the most concentrated, technology related to expansion joints continues to occur, but cracks and pop-out phenomena continue to occur in the pouring part of the second concrete due to the low crack resistance performance of concrete. In fact, the damage of the futa-bu concrete can threaten the safety performance of the entire bridge as well as damage to the expansion joints. In addition, the part that needs to be constructed after concrete is a structure in common use, and when it is damaged or dropped, it can cause great damage to the vehicle while driving, and furthermore, it can lead to personal injury.

However, in the present invention, in order to improve the durability performance by increasing the crack resistance of the concrete used in the expansion joint, there is provided a post-composition comprising different types of fibers.

That is, the high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement according to an embodiment of the present invention uses a mixture of fibers of different phases, thereby increasing the crack resistance and causing external fault factors (vibration, impact, etc.) , temperature change, etc.) can reduce drop-out and exfoliation.

Specifically, as the heterogeneous fibers, any one or more fibers of PVA, nylon, PE and PP may be used, and microfibers having an average length of 5 to 10 mm and an average diameter of 7 to 30 μm, and an average length of 12 to 60 mm, a mixed fiber of macro fiber having an average diameter of 0.2 to 0.8 mm is used, and in the mixed fiber, the micro fiber and macro fiber are mixed in a ratio of 1:1 to 1:2 by volume, so that only a single type of fiber is used It can improve ductility and deformability than

Generally, fibers are divided into micro and macro fibers according to their size (length and diameter). Microfibers have a length of 5-10 mm and a diameter of 7-30 μm, whereas macro fibers have a length of 12-60 mm and a diameter of 0.2-0.8 mm.

Microfibers are strong and rigid, providing initial crack strength and ultimate strength, while macrofibers are relatively flexible and improve ductility and deformability in the post-crack region.

In the prior art, fibers were added to improve mechanical properties such as strength of cement compositions, but there was a problem that the effect of reinforcing hybrid fibers having different material properties could not be obtained because only a single type of fiber was added and used.

In general, fiber-reinforced cement composite materials have been limited to a single fiber, and research on hybrid fiber-reinforced cement composite materials that maximizes the effect that a single fiber using different types of fibers with different material properties can be mixed in an appropriate ratio was in short supply.

According to an embodiment of the present invention, a mixed fiber of microfibers having an average length of 5 to 10 mm and an average diameter of 7 to 30 μm and macro fibers having an average length of 12 to 60 mm and an average diameter of 0.2 to 0.8 mm In the mixed fiber, the micro fiber and macro fiber are mixed in a ratio of 1:1 to 1:2 by volume, effectively controlling cracking to improve durability, and simultaneously increase strength and flexural toughness to improve the mechanical performance.

That is, since microfibers and macrofibers are hybridized and reinforced, strength enhancement by microfibers and toughness enhancement effects by macrofibers can be obtained at the same time, and ductility and deformability are improved compared to using only a single type of fiber can do it

In the present invention, any one or more fibers of PVA, nylon, PE, and PP may be used as microfibers and macrofibers, and different types of fibers may be used.

In particular, in one embodiment of the present invention, in the mixed fiber, the micro fiber and the macro fiber are mixed in a ratio of 1:1 to 1:2 by volume, so that it is possible to effectively control cracks and improve durability as well as strength and The mechanical performance can be improved by simultaneously increasing the flexural toughness.

That is, by mixing the micro fibers and macro fibers in a ratio of 1:1 to 1:2 by volume, compressive strength and flexural toughness may be excellent. In particular, when the micro fibers and macro fibers are mixed in a 1:1 volume % ratio, the effect of improving compressive strength and flexural toughness can be maximized, so it can be seen that this is an optimal mixing ratio.

In one embodiment of the present invention, when the latter composition contains less than 0.01% by weight of mixed fibers, there is a slight problem in the effect of improving compressive strength and flexural toughness, and when the mixed fibers include more than 5% by weight, fibers If the content of is excessive, there may be a problem in dispersion or a problem in that the fibers are eluted to the surface, and thereby a problem of lowering strength may occur.

On the other hand, according to another embodiment of the present invention, 100 parts by weight to 300 parts by weight of fine aggregate is pre-mixed with respect to 100 parts by weight of the latter material composition and 100 parts by weight of the latter material composition, and 200 parts by weight based on 100 parts by weight of the latter material composition. High durability for post-repair and bridge surface pavement repair of expansion joints, characterized in that parts by weight to 400 parts by weight of coarse aggregate are pre-packed together with the pre-mixed post-mixed composition and fine aggregate. An article comprising the polymer concrete composition is provided.

As described above, in the high-durability polymer concrete composition for post-repair and bridge pavement repair of expansion joints according to the present invention, 100 parts by weight to 300 parts by weight of fine aggregates are premixed with respect to 100 parts by weight of the second material composition and the second material composition. -mixed), it has the advantage of being easy to use as a post-mixed composition in a pre-mixed form so that it can be used immediately after mixing using only water in the field.

In other words, since performance improving agents and shrinkage reducing agents (all powder type) are produced in pre-mix at the factory, there is no need for a ternary (three-component) mixing process at the site, so it is possible to pour injection materials with constant quality. it's a technique

The post-component composition used in the conventional post-component construction method was mainly used in a two-component or three-component type. For this reason, there is a inconvenience of having to mix the rear material during construction, and there is a problem that the quality of the rear material is not constant when pouring after mixing.

However, the after-treatment material according to an embodiment of the present invention is a pre-mixed type that can be used immediately after mixing using only water in the field. It has the advantage of being easy to use.

However, since the after-material mixed with water in the field may be partially cured by reaction during the transfer process in the equipment, the filler according to the present invention may further include a retarder composition. Since the retarder composition can secure workability for a certain period of time, it is possible to delay the reaction even if a post-mixing material in a pre-mixing form is provided as in the present invention, so that work can be performed in a state in which only water is mixed in the field. do.

The high-durability polymer concrete composition for post-repair and bridge pavement repair of expansion joints according to an embodiment of the present invention is a retarder composition in which one or two or more of citric acid, gluconic acid, and tartaric acid are mixed 　0.01 to 1.0 wt% includes

By including 0.01 to 1.0 wt% of a retarder composition in which one or two or more of the citric acid, gluconic acid, and tartaric acid are mixed, even if a post-mixed product in a pre-mixed form is provided, in the process of transporting to the site By delaying the reaction, it is possible to work with only water mixed in the field.

When the content of the retardant composition in which one or two or more of the citric acid, gluconic acid, and tartaric acid is mixed is more than 1.0 wt%, the initial reaction time is excessively delayed and the strength development may be delayed, and when it is less than 0.01 wt% Operation is impossible due to the rapid reaction.

1 is a process diagram showing a construction method using a high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement of the present invention.

The construction method using the high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement according to another embodiment of the present invention includes the steps of removing the deteriorated portion of the concrete after the expansion joint and performing a planarization operation ; Applying a primer to the area where the concrete after the expansion joint is poured; And in a product comprising a high-durability polymer concrete composition for post-repair and bridge-surface pavement repair of the expansion joint, the pre-mixed post-mix composition, fine aggregate, and metered coarse aggregate are mixed with metered mixed water It is characterized in that it comprises a; the step of hardening by installing the expansion joint rear part.

The construction method using the high-durability polymer concrete composition for post-repair and bridge pavement repair of the expansion joint of the present invention is a preliminary operation, and the construction section is cleaned by washing with high pressure water to remove the deteriorated part of the concrete after the expansion joint. Clean up.

Next, the high-durability polymer concrete composition for post-repair and bridge-surface pavement repair of expansion joints is sprayed with water on the surface on which the concrete after expansion joints are to be placed in order to increase the adhesive strength on the surface where the concrete after the expansion joints are to be placed. Keep wet or apply a primer.

Next, in the product including the high-durability polymer concrete composition for the rear repair of the expansion joint and the repair of the bridge pavement according to an embodiment of the present invention, the pre-mixed composition and the fine aggregate are measured A step of hardening is performed by mixing the washed coarse aggregate with the metered mixed water and applying it to the bridge surface or road.

The product including the high-durability polymer concrete composition for post-repair and bridge pavement repair of expansion joints according to an embodiment of the present invention contains 100 parts by weight to 300 parts by weight of fine aggregate based on 100 parts by weight of the after-material composition and the after-material composition. (pre-mixed), 200 parts by weight to 400 parts by weight of coarse aggregate with respect to 100 parts by weight of the after-material composition pre-packed with the pre-mixed composition and fine aggregate Therefore, there is a feature that can be used immediately after mixing using only water in the field without the need for a conventional ternary (three-component) type mixing process in the field.

For this reason, there is an effect that can provide a method capable of pouring an injection material having a constant quality.

Hereinafter, examples of the high-durability polymer concrete composition according to the present invention will be described.

<Example 1>

Fineness of 6,000 cm ² /g or more of micro cement 50 wt%, calcium aluminate, magnesium aluminate, calcium sulfur aluminate, magnesium sulfur aluminate, 30 wt% of quick-setting cement mixed with one or more types, dihydrate gypsum One or two types of chloride, carbonate, sulfate, and oxalate containing active polyvalent metal ions of calcium, magnesium, manganese, and aluminum, 10% by weight of gypsum mixed with one or two or more of hemihydrate gypsum and anhydrite 1.0% by weight of an active accelerator in which the above is mixed, 1.0% by weight of a curing accelerator in which one or two or more of lithium carbonate, lithium sulfate, and lithium hydroxide are mixed, one of naphthalene sulfonate, melamine sulfonate, and polycarboxylate; or A porous type strongly basic anion exchange resin in which an exchange group of trimethylamine (TMA) is bonded to the main chain of a copolymer of 1.0 wt% of a dispersant mixed with two or more, styrene monomer and divinyl benzene 4.8 wt% of a performance improving material comprising: 0.4 wt% of microfibers including at least one of PVA, nylon, PE and PP and 0.8 wt% of macro fibers comprising at least any one of PVA, nylon, PE and PP 1.2% by weight of mixed fiber, 1.0% by weight of a retarder in which one or two or more of citric acid, gluconic acid, and tartaric acid are mixed, and 170 parts by weight of fine aggregate and 250 parts by weight of coarse aggregate and 40 parts by weight of water based on 100 parts by weight of this latter material A high-durability polymer concrete composition was prepared by mixing parts by weight.

<Example 2>

Under the same conditions as in Example 1, 3.8 wt% of a porous type strongly basic anion exchange resin in which an exchange group of trimethylamine (TMA) is bonded to the main chain of a copolymer of styrene monomer and divinyl benzene and A slurried (mortar) slurried material was prepared including 4.8 wt% of a performance improving material satisfying 1.0 wt% of potassium thiocyanate.

<Example 3>

Under the same conditions as in Example 2, 0.6% by weight of microfibers containing at least one of PVA, nylon, PE and PP and 0.6% by weight of macrofibers containing at least one of PVA, nylon, PE and PP, microfibers A slurried (mortar) slurried material was prepared including 1.2 wt% of a mixed fiber in which the macro fiber and the macro fiber satisfies a mixing ratio of 1:1 wt%.

<Comparative Example 1>

Under the same conditions as in Example 1, a composition was prepared without adding fibers.

<Comparative Example 2>

Only microfibers among the fibers were added under the same conditions as in Example 1, and a post-treatment composition was prepared.

<Comparative Example 3>

Under the same conditions as in Example 1, only macro fibers among fibers were added to prepare a post-composition composition.

<Comparative Example 4>

Performance improvement comprising a porous type strongly basic anion exchange resin in which an exchanger of trimethylamine (TMA) is bonded to the main chain of a copolymer of styrene monomer and divinyl benzene under the same conditions as in Example 1 The composition was prepared without adding ash.

Formulation (wt%)
Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4





functional binder

binder micro cement 50 50 50 50 50 50 50 crude steel
cement quick-hardening
cement 30 30 30 30 30 30 30 gypsum 10 10 10 11.2 10 10 14.8 activator
1.0 1.0 1.0 1.0 1.0 1.0 1.0 hardening accelerator
1.0 1.0 1.0 1.0 1.0 1.0 1.0 dispersant
1.0 1.0 1.0 1.0 1.0 1.0 1.0 performance improver Strong basic anion exchange resin 4.8 3.8 3.8 4.8 4.8 4.8

0 Potassium Thiocyanate - 1.0 1.0 - - fiber micro fiber 0.4 0.4 0.6
0 1.2 - 0.4 macro fiber 0.8 0.8 0.6 - 1.2 0.8 retardant
1.0 1.0 1.0 1.0 1.0 1.0 1.0 total
100 100 100 100 100 100 100 fine aggregate No. 4 70 parts by weight 70 parts by weight 70 parts by weight 70 parts by weight 70 parts by weight 70 parts by weight 70 parts by weight No. 5 50 parts by weight 50 parts by weight 50 parts by weight 50 parts by weight 50 parts by weight 50 parts by weight 50 parts by weight No. 6 50 parts by weight 50 parts by weight 50 parts by weight 50 parts by weight 50 parts by weight 50 parts by weight 50 parts by weight coarse aggregate 250 parts by weight 250 parts by weight 250 parts by weight 250 parts by weight 250 parts by weight 250 parts by weight 250 parts by weight

Hereinafter, compressive strength, flexural strength, early stage compressive strength, and flame resistance tests were performed on the Examples and Comparative Examples.

Table 2 below shows the results of testing with the composition for repairing concrete cement structures based on KS F 4042 for the Examples and Comparative Examples.

The compressive strength test was measured in accordance with KS F 2405 「Concrete Compressive Strength Test Method」. A circular specimen of Φ100×200mm was prepared and cured for 28 days in a curing room at a temperature of 20±3° C. and a humidity of 80%. Since the initial strength is an important consideration, the age of 4 hours was measured, and the long-term strength expression was observed through 28 days.

The flexural strength test was measured in accordance with KS F 2407 'Testing method for flexural strength of concrete'. A 100×100×400 mm circular specimen was prepared, and after curing for 28 days in a curing room at a temperature of 20±3° C. and a humidity of 80%, the value was measured as follows. Similarly, since the initial strength is an important consideration, the age of 4 hours was measured, and the long-term strength development was observed through 28 days.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 compressive strength
(MPa) 4 hours 20.5 27.5 28.8 22.5 21.5 21.2 20.2 28 days 53.8 54.2 55.2 51.2 50.8 50.2 48.3 flexural strength
(MPa) 4 hours 4.7 4.8 5.2 3.8 4.0 4.1 4.2 28 days 5.9 6.0 6.2 4.8 5.8 6.2 5.4

Referring to [Table 2], PVA, nylon, PE, and PP containing any one or more microfibers and PVA, nylon, PE and PP macro fibers containing any one or more mixed fibers containing a mixed fiber It can be seen that Examples 1 to 3 have excellent compressive strength and flexural strength compared to Comparative Example 1 without fibers, Comparative Example 2 containing only microfibers, and Comparative Example 3 containing only macro fibers.

In particular, as 0.6% by weight of microfibers including at least one of PVA, nylon, PE and PP and 0.6% by weight of macrofibers including at least one of PVA, nylon, PE and PP, microfibers and macrofibers are 1 Compressive strength and flexural strength in Example 3 containing 1.2 wt% of mixed fibers satisfying a mixing ratio of :1 wt% compared to Examples 1 and 2 in which microfibers and macro fibers satisfy a mixing ratio of 1:2 wt% It can be seen that is better than

Table 3 below shows freeze-thaw resistance, weight reduction rate, and chloride ion penetration resistance performance, and shows the results of the tests for the Examples and Comparative Examples.

For the freeze-thaw resistance test, the freeze-thaw resistance test was conducted according to KS F 2456 「Test method for resistance to rapid freezing and thawing of concrete」. Specimens are made of 100 × 100 × 400 mm prismatic specimens for each formulation, and cured in a constant temperature and humidity room at 20±5 ℃. One cycle was defined as falling to +4 °C during melting. After repeating up to 300 cycles, the relative kinematic modulus was measured.

To evaluate the chemical resistance, a circular specimen of Φ10×20cm was prepared and cured, immersed in 5% sulfuric acid solution for 28 days, and the mass change rate before and after immersion was measured and evaluated. The formula to calculate the mass change rate is as follows same.

Mass change rate (%) = [(W-C)/C]×100

where C = weight before immersion (g), W = weight after immersion (g)

Next, in order to evaluate the chlorine ion penetration resistance performance of concrete, it was carried out according to KS F 2711 「Test method for chlorine penetration resistance of concrete by electrical conductivity」. A cylindrical specimen made of Φ 100×200 mm was cured for 28 days in a constant temperature/humidity room with a temperature of 20±3 ℃ and a humidity of 60%. This was cut to a height of 50 mm, and the surface was dried for 1 hour. All the sides of the dried specimen were sealed with a rapid coating agent, put in a vacuum desiccator, and the pressure was reduced to 133 Pa (1 mmHg) or less, and the pretreatment process was performed by immersion in vacuum for 3 hours and distilled water for 18±2 hours. Place the pre-treated specimen in the test cell, and supply a constant voltage of 60V by connecting a 0.3 N aqueous NaOH solution to the positive (+) pole of the power supply and a 3% NaCl aqueous solution to the negative (-) pole. The test time was conducted for 6 hours, and the current was measured every 30 minutes to measure the amount of passing charge (coulombs).

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Early compressive strength (4 hours) 20.5 27.6 28.8 22.5 21.5 21.2 20.2 Freeze-thaw resistance
(%) 79 88 92 78 73 75 68 Weight reduction (%) 7.8 7.1 6.8 11.5 12.4 12.6 14.5 Chloride ion penetration resistance (coulombs) 1150 1200 820 1500 1450 1400 2400

As shown in [Table 3], a porous type strongly basic anion exchange resin in which an exchange group of trimethylamine (TMA) is bonded to the main chain of the copolymer of the styrene monomer and divinyl benzene, or (Example 1), a porous type strong basic anion exchange resin in which an exchange group of trimethylamine (TMA) is bonded to the main chain of the copolymer of the styrene monomer and divinyl benzene and potassium thiocyanate ( In the case of adding a performance improving agent containing potassium thiocyanate (Examples 2 and 3), the freeze-thaw resistance is higher, and the weight reduction rate and chloride ion penetration resistance are higher than in the case where the flame resistance performance improver is not included (Comparative Example 4). It can be seen that the flame resistance performance and durability are excellent.

In particular, 3.8 wt% of a porous type strongly basic anion exchange resin in which an exchange group of trimethylamine (TMA) is bonded to the main chain of the copolymer of the styrene monomer and divinyl benzene and potassium thiocyanate (Potassium) In the case of Examples 2 and 3, which satisfies 4.8 wt% of a performance improving material satisfying 1.0 wt% of thiocyanate, earlier compression than that of Examples 1 and Comparative Examples 1 to 3 not containing potassium thiocyanate It can be seen that the strength is excellent, and in addition, the flame resistance performance and durability are more excellent.

The above description is merely illustrative of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed herein are for illustrative purposes rather than limiting the present invention, and the spirit and scope of the present invention are not limited by these embodiments. The protection scope of the present invention should be construed by the claims, and all technologies within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (8)

Based on 100% by weight of the total after-treatment material composition, coarse cement with a fineness of 4,500 cm ² /g or more or micro cement with a fineness of 6,000 cm ² /g or more, 40-60% by weight, calcium aluminate (CA), magnesium aluminate (MA) , Calcium sulfoaluminate (CSA), magnesium sulfoaluminate (MSA) comprising a quick-setting composition comprising 20 to 50% by weight of one or a mixture of two or more,
5-20 wt% of a gypsum composition in which one or two or more of dihydrate gypsum, hemihydrate gypsum, and anhydrite are mixed;
0.01 to 1.0 wt% of an activity promoter composition containing one or more of chloride, carbonate, sulfate, and oxalate containing active polyvalent metal ions of calcium, magnesium, manganese, and aluminum;
0.01 to 1.0 wt% of a curing accelerator in which one or two or more of lithium carbonate, lithium sulfate, and lithium hydroxide are mixed;
0.01 to 1.0% by weight of at least one dispersant among naphthalene sulfonate, melamine sulfonate, and polycarboxylate;
0.01 to 1.0% by weight of a retarder composition in which one or two or more of citric acid, gluconic acid, and tartaric acid are mixed;
A porous type strongly basic anion exchange resin in which an exchange group of either trimethylamine (TMA) or dimethylethanolamine (DMEA) is bonded to the main chain of a copolymer of styrene monomer and divinyl benzene 0.01 to 10% by weight of a performance improving material comprising a, and
An average length of 5 to 10 mm, an average diameter of 7 to 30 μm, and microfibers comprising at least one of PVA, nylon, PE and PP, an average length of 12 to 60 mm, and an average diameter of 0.2 to 0.8 mm, , PVA, nylon, PE and PP containing any one or more of the macro fiber is mixed fibers containing 0.01 to 5% by weight,
The performance improving material further includes potassium thiocyanate, and it is characterized in that it contains 0.01 to 1.0% by weight based on 100% by weight of the total after-treatment composition.
A high-durability polymer concrete composition for rear-end repair of expansion joints and repair of bridge pavement.
According to claim 1,
In the mixed fiber, the micro fiber and the macro fiber are mixed in a ratio of 1:1 to 1:2 by volume, and a high-durability polymer concrete composition for rear repair of expansion joints and repair of bridge pavement.
According to claim 1,
The strongly basic anion exchange resin has an average particle diameter of 0.5 to 0.6 mm, a ratio of D50 to D90 in the particle size distribution curve (D50/D90) of 1.1 or less, and a degree of crosslinking of 8 to 10%. A high-durability polymer concrete composition for futa repair and bridge pavement repair.
delete According to any one of claims 1 to 3, 100 parts by weight to 300 parts by weight of fine aggregates are pre-mixed with respect to 100 parts by weight of the latter material composition and 100 parts by weight of the latter material composition, and 200 parts by weight based on 100 parts by weight of the latter material composition. High durability for post-repair and bridge surface pavement repair of expansion joints, characterized in that parts by weight to 400 parts by weight of coarse aggregate are pre-packed together with the pre-mixed post-mixed composition and fine aggregate. A product comprising a polymer concrete composition.
removing the deteriorated portion of the concrete after the expansion joint and performing a planarization operation;
Applying a primer to the area where the concrete after the expansion joint is poured; and
In the product containing the high-durability polymer concrete composition for the post-repair of the expansion joint of claim 5 and the repair of the bridge surface pavement, the pre-mixed post-mixed composition and fine aggregate and the measured coarse aggregate are mixed A construction method using a high-durability polymer concrete composition for rear repair of an expansion joint and repair of a bridge surface pavement comprising a;
7. The method of claim 6,
The fine aggregate includes 100 parts by weight to 300 parts by weight based on 100 parts by weight of the after-thickening material composition, and the coarse aggregate comprises 200 parts by weight to 400 parts by weight with respect to 100 parts by weight of the latter material composition. Construction method using high-durability polymer concrete composition for futa repair and bridge pavement repair.
7. The method of claim 6,
The mixing water is 20 parts by weight to 70 parts by weight based on 100 parts by weight of the after-material composition.

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