KR102411277B1 - Self-healing asphalt composition and waterproofing material, asphalt mixture, manufacturing method, waterproofing structure method, pavement method thereof - Google Patents

Abstract

The present invention relates to a paving method using a self-repairing rubber asphalt composition, and more specifically, 60 to 80 wt% of straight asphalt, 10 to 30 wt% of process oil, 1 to 10 wt% of ionomer, styrene-based It is composed of 1 to 20% by weight of a thermoplastic polymer, 1 to 10% by weight of an olefinic thermoplastic polymer, 1 to 20% by weight of a reinforcing agent, and 1 to 10% by weight of a tackifier.
Therefore, by mixing a polymer with high interatomic bonding force and a supramolecular polymer having non-covalent bonds with asphalt to form a complex supramolecular complex network structure, the microcrack interface in the rubber asphalt sticks to each other to suppress the growth of microcracks and waterproofing material The self-healing ability is given to the pavement and the pavement fiber layer coated or impregnated with antioxidants and asphalt is installed on top of the rubber asphalt waterproofing layer, and the self-repairing asphalt mixture is laid on the top to induce reflective cracking while inducing the integration of the multi-layer structure. Provided is a packaging method using a self-repairing rubber asphalt composition that inhibits and prevents the loss of more than molecular units of the rubber asphalt waterproofing layer, and blocks ultraviolet rays to maintain the physical properties of the rubber asphalt composition for a long time and prevent cracking.

Description

Packaging method using self-repairing rubber asphalt composition {SELF-HEALING ASPHALT COMPOSITION AND WATERPROOFING MATERIAL, ASPHALT MIXTURE, MANUFACTURING METHOD, WATERPROOFING STRUCTURE METHOD, PAVEMENT METHOD THEREOF}

The present invention relates to a paving method using a self-repairing rubber asphalt composition, and in particular, a bridge deck or slab that receives a traffic load by having self-healing ability using a complex covalent bond between polymers and a non-covalent bond of a supramolecular complex network. It relates to a paving method using a self-repairing rubber asphalt composition that provides a self-healing ability to the rubber asphalt coating waterproofing material installed in the structure and the asphalt concrete pavement, and guarantees a long life by installing oxidation and crack prevention pavement fibers.

In general, as time goes by, the physical properties of asphalt are brittle by oxides such as chitons and carboxylic acids generated by molecular cutting by ultraviolet rays and oxidation reaction between oxygen and asphalt hydrocarbons, and cracks occur.

In particular, the asphalt-based road pavement or waterproofing material that is subjected to environmental loads such as temperature changes and vehicle traffic loads may deteriorate faster and may easily crack.

Currently, there are many crack repair methods such as sealant treatment, but there is no technology to prevent cracks by sealing microcracks.

For the purpose of repairing cracks revealed so far, the asphalt surface is treated with a sealant that protects the asphalt surface from environmental degradation and moisture penetration, or the original asphaltene and malten ratio is restored to restore the properties of the aged asphalt to the original asphalt. In some cases, a rejuvenator designed to change the physical properties is injected.

However, this sealant treatment and injection of the property recovery agent are difficult to disperse in the material of the damaged area, so it can only work on the surface of the asphalt pavement, and it is expensive and may cause stability problems, and repeated damage in the same area is difficult to recover. It has the disadvantage that it is not continuous and is only one-time, and these are for the purpose of crack repair, not for the purpose of preventing cracks.

That is, the method described above is a crack repair method, not a crack prevention or prevention method, is not continuous, and has a problem that requires a lot of time and effort to work in that it requires additional work.

Registered Patent No. 10-1025011 Registered Patent No. 10-1524934

The present invention has been devised to solve the above problems, and it has self-healing ability using covalent bonds between complex polymers and non-covalent bonds of supramolecular complex networks. To provide a paving method using a self-repairing rubber asphalt composition that provides self-healing ability to the asphalt coating waterproofing material and the asphalt concrete pavement, and guarantees a long lifespan of the waterproofing material and pavement by installing oxidation and crack prevention pavement fibers. There is this.

The above purpose is, straight asphalt 60 to 80% by weight, process oil 10 to 30% by weight, ionomer 1 to 10% by weight, styrenic thermoplastic polymer 1 to 20% by weight, olefinic thermoplastic polymer 1 to 10% by weight , is achieved by self-repairing rubber asphalt, characterized in that it is composed of 1 to 20% by weight of a reinforcing agent, and 1 to 10% by weight of a tackifier.

And, for the above purpose, 60 to 80% by weight of straight asphalt, 10 to 30% by weight of process oil, and 1 to 10% by weight of ionomer are put into a heating stirrer and heated and mixed at 140 to 190℃ for 2-3 hours. a first mixture generating step of generating a first mixture; When the first mixture is produced, 1 to 20% by weight of a styrene-based thermoplastic polymer and 1 to 10% by weight of an olefin-based thermoplastic polymer are added, and then heated and mixed at a temperature of 140 to 190° C. for 2-3 hours to produce a second mixture a second mixture production step; When the second mixture is produced, 1 to 10% by weight of a reinforcing agent, 1 to 20% by weight of a filler, and 1 to 10% by weight of a tackifier are added, and the mixture is heated and mixed at a temperature of 140 to 190℃ for 2 to 3 hours. It is also achieved by a method of manufacturing a self-repairing rubber asphalt waterproofing material.

In addition, for the above purpose, 60 to 80% by weight of straight asphalt, 10 to 30% by weight of process oil, and 1 to 10% by weight of ionomer are put into a heating stirrer and heated and mixed at 140 to 190℃ for 2-3 hours. a first mixture generating step of generating a first mixture; When the first mixture is produced, 1 to 20% by weight of a styrene-based thermoplastic polymer and 1 to 10% by weight of an olefin-based thermoplastic polymer are added, and then heated and mixed at a temperature of 140 to 190° C. for 2-3 hours to produce a second mixture a second mixture production step; When the second mixture is produced, 1 to 20% by weight of a reinforcing agent and 1 to 10% by weight of a tackifier are added and heated and mixed at a temperature of 140 to 190° C. for 2 to 3 hours to prepare a self-repairing rubber asphalt binder; ; When the self-repairing rubber asphalt binder is produced, 5 to 20% by weight of the rubber asphalt binder and 80 to 95% by weight of the aggregate are mixed to prepare a self-repairing rubber asphalt mixture. method is also achieved.

Here, as the aggregate, in the case of water-permeable asphalt, the size of the aggregate mixed as the maximum aggregate is 13 mm to 20 mm, and in the case of the impermeable waterproof asphalt, it is preferable that the size of the aggregate mixed as the maximum aggregate is 4.75 mm to 10 mm. .

On the other hand, the above object, the base surface cleaning step (S1) of removing foreign substances from the structure base surface 102, and maintaining the surface dry state; an adhesive layer forming step (S2) of forming an adhesive layer 104 by applying an adhesive to the base surface 102 by the base surface cleaning step; A coating film waterproofing layer forming step (S3) of forming a self-healing film waterproofing layer 106 by laying 0.5 to 3.0 mm of any one of the self-repairing rubber asphalt and the self-repairing rubber asphalt waterproofing material on the adhesive layer 104 and ; A sheet layer forming a sheet layer 108 by laying a sheet-type waterproof packaging fiber 202 with a thickness of 1.0 to 3.0 mm formed by impregnating or coating asphalt with an antioxidant on an upper portion of the coating film waterproof layer 106, or impregnated with a nonwoven fabric or felt. It is achieved by a waterproofing method using a self-repairing rubber asphalt, characterized in that it includes a forming step (S4).

Here, it is preferable that the sheet-type waterproof packaging fiber 202 has a mesh network 204 having a grid size of 5 to 20 mm installed thereon.

On the other hand, the above object, the base surface cleaning step (S11) to remove foreign substances on the base surface of the structure 102, and to maintain the surface dry state; an adhesive layer forming step (S22) of forming an adhesive layer 104 by applying an adhesive to the base surface 102 by the base surface cleaning step; Self-repairing, characterized in that it comprises a pavement layer forming step (S33) of installing the asphalt concrete pavement layer 110 by installing the self-repairing rubber asphalt mixture to a thickness of 2 to 10 cm on the adhesive layer 104 It is also achieved by a paving method using a linear rubber asphalt composition.

And, the above object, the base surface cleaning step (S11) of removing foreign substances from the structure base surface 102, and maintaining the surface dry state; an adhesive layer forming step (S22) of forming an adhesive layer 104 by applying an adhesive to the base surface 102 by the base surface cleaning step; The self-repairing rubber asphalt of claim 1 and the self-repairing rubber asphalt waterproofing material of claim 1 are placed on top of the adhesive layer 104 by 0.5 to 3.0 mm to form a self-healing coating waterproofing layer 106 (S23) )Wow; A sheet layer forming a sheet layer 108 by laying a sheet-type waterproof packaging fiber 202 with a thickness of 1.0 to 3.0 mm formed by impregnating or coating asphalt with an antioxidant on an upper portion of the coating film waterproof layer 106, or impregnated with a nonwoven fabric or felt. forming step (S24); It characterized in that it comprises a pavement layer forming step (S33) of installing the asphalt concrete pavement layer 110 by installing the self-repairing rubber asphalt mixture of claim 3 on the adhesive layer 104 to a thickness of 2 to 10 cm. It is achieved by the waterproof pavement method using self-repairing rubber asphalt.

Here, it is preferable to install a mesh network 204 having a grid size of 5 to 20 mm on the sheet-type waterproof packaging fiber 202 .

The present invention is to form a complex supramolecular complex network structure by mixing a supramolecular type polymer having a high covalent bond and a non-covalent bond with a polymer having a high covalent bond with the asphalt, so that the microcrack interface in the rubber asphalt compound sticks to each other. It gives self-healing ability while suppressing crack growth, and installs sheet-type waterproof pavement fiber coated or impregnated with antioxidant and asphalt on the upper part to induce integration with the rubber asphalt compound located at the bottom while forming a coating film waterproof layer or pavement layer By increasing the adhesion between individual layers, it is possible to prevent lifting between layers, to prevent the loss of more than the molecular unit of the rubber asphalt compound, and to keep the physical properties of the rubber asphalt compound for a long time by blocking ultraviolet rays and to prevent cracking. has the effect of

1 is a flowchart illustrating a waterproofing method using self-repairing rubber asphalt according to the present invention in time series.
2 is a view showing a construction cross-section according to the waterproofing method using the self-repairing rubber asphalt of the present invention.
3 is a flowchart showing a time series of a paving method using a self-repairing rubber asphalt composition according to the present invention.
4 is a view showing a construction cross-section according to the pavement method using the self-repairing rubber asphalt composition of the present invention.
5 is a flowchart illustrating a waterproof pavement method using self-repairing rubber asphalt according to the present invention in time series.
6 is a view showing another embodiment of the sheet-type packaging fiber according to the present invention.

The present invention is a self-repairing rubber asphalt composition and a construction method thereof. Hereinafter, the composition of the self-repairing rubber asphalt will be described, and then the self-repairing rubber asphalt waterproofing material and the self-repairing rubber asphalt mixture will be described. The waterproofing method using the self-repairing rubber asphalt, the paving method using the self-repairing rubber asphalt, and the waterproofing paving method using the self-repairing rubber asphalt will be described.

<Self-repair rubber asphalt composition>

The self-repairing rubber asphalt composition includes 60 to 80% by weight of straight asphalt, 10 to 30% by weight of process oil, 1 to 10% by weight of ionomer, 1 to 20% by weight of styrenic thermoplastic polymer, and 1 to 20% by weight of olefinic thermoplastic polymer It is composed of 1 to 10% by weight, 1 to 20% by weight of a reinforcing agent, and 1 to 10% by weight of a tackifier.

Of the self-repairing rubber asphalt composition, straight asphalt is a major component, and the type is divided into AP-3 and AP-5 depending on the penetration, and the straight asphalt has a penetration of 80 to 100, and crude oil It contains a lot of bituminous matter that is not decomposed into the last remaining material when light content is removed through atmospheric pressure, vacuum distillation apparatus, etc., and the penetration is preferably about 40 or more, and the straight asphalt is a self-repairing rubber 60 to 80% by weight is added based on 100% by weight of the total asphalt composition.

In addition, the process oil of the self-repairing rubber asphalt composition may be selected from at least one of paraffinic oil, naphthenic oil, aromatic oil, or vegetable oil such as soybean, corn, etc. It can be used as a strengthening agent for fluidity, dispersibility, and physical properties of asphalt, and when added, has a low viscosity to improve initial adhesion and helps to improve permeability to adherends.

When less than 10% by weight of process oil is added to 100% by weight of the self-repairing rubber asphalt composition, it is not possible to suppress abrupt changes in physical properties, and it is difficult to properly control the working temperature, and also to improve tensile performance and heat resistance. is difficult to secure, and when 30 wt% or more is added, plasticity is lost and morphological stability cannot be maintained.

In addition, the ionomer in the self-repairing rubber asphalt composition is a copolymer of ethylene and methylacrylic acid, which are olefin-based carboxylated ionomers, and includes Na, K, Mg, Zn, etc. in the carboxyl group. As a generic term for polymers having cross-linking by metal ions, ionomers have good adhesion to other polymers or metal foils and good adhesion to oil or oil.

The amount of methyl acrylic acid or methyl acrylate in the ionomer is about 4 to 15%, and the smaller the amount of methyl acrylate, the smaller the metal adhesion, the stiffness, and the transmittance, while the adhesive strength increases. The characteristic of ionomer resin is that when the ion crosslinked molecule is heated, the crosslink is broken and thermal adhesiveness appears, so the workability is improved, and when cooled, it is ion crosslinked again and becomes strong, so it has excellent mechanical properties. In addition, it has excellent oil resistance and cold resistance, and has excellent resistance to strong acids, strong alkalis, grease oil, organic solvents and water.

In order to obtain self-healing properties, there must be an external stimulus capable of recovering the broken bond or attraction in the polymer material and an element of intermolecular covalent or supramolecular attraction. A method using a thermoplastic elastomer having a reversible dynamic covalent bond, an environmental load such as a high temperature in summer, and a traffic load such as manpower and vehicle was adopted.

This is because the supramolecular sieve polymer having non-covalent bonds has a disadvantage in that its supramolecular attraction has a lower binding energy compared to the covalent force, and its properties are similar to rubber, so it is difficult to use as a structural material due to weak mechanical strength. The disadvantages were reinforced by mixing.

A supramolecular complex network is formed by mixing a linear supramolecular sieve having a single molecule capable of multi-hydrogen bonding at the end of the linear oligomer and a non-linear supramolecular sieve having a single molecule capable of multi-hydrogen bonding at the end of the non-linear oligomer to form a cross-linked supramolecular body. .

In the present invention, by mixing the ionomer having the carboxyl group and metal ion of asphaltene in straight asphalt to form a dense supramolecular network and mixing the covalent bonds of the thermoplastic polymer, the network structure of rubber asphalt is made more dense, and intermolecular or intermolecular attraction External damage such as cracks or scratches and microcracks generated in the material by the self-healing.

Here, the self-healing network using a supramolecular sieve is prepared in a mixed form of a linear supramolecular sieve and a nonlinear supramolecular sieve, and the linear supramolecular sieve has high chain mobility but few crosslinking points, and the nonlinear supramolecular sieve has low chain mobility, so high chain mobility and many Since it is important to properly mix the linear and non-linear supramolecular sieves to have a crosslinking point at the same time, it is preferable to add 1 to 10% by weight of the ionomer based on 100% by weight of the total weight of the self-repairing rubber asphalt composition.

The ionomer used in the present invention is a powder or granular olefin-based carboxyl ionomer, a polymer copolymerized with ethylene and (meth)acrylic acid. It acts as a reversible cross-linking between the supramolecular network polymer chains.

In addition, the olefin-based carboxyl ionomer consists of about 75 to 80% of hydrogen bonds and 15 to 20% of ionic bonds, and forms non-covalent hydrogen bonds with maltene in asphalt and ionic bonds with metal compounds.

The ethylene-based ionomer used in the present invention has similar physical properties to the ethylene-based resin and is easy to mix, but in the present invention, compatibility with asphalt is improved by mixing EVA with polarity, and the By inducing the bonding force between the two poles of EVA, the complex self-healing ability was increased.

When a complex network structure in the form of supramolecules is formed based on non-covalent bonds and covalent bonds, the interaction force between molecules and atoms is re-formed through molecular recognition and rearrangement at the time of initial breakage by external impact, enabling healing and repairing damaged areas. Damaged parts can be restored several times just by touching each other.

Among the self-repairing rubber asphalt composition, the styrenic thermoplastic polymer is SBS (Styrene Butadiene Styrene), SBR (Styrene Butadiene Rubber), SEBS (Styrene Ethylene Butadiene Styrene), SIS (Styrene Isoprene Styrene) and a polymer polymerized with the styrenic polymer. As one or more of these are selected, the high modulus of elasticity of the rubber asphalt mixture is improved to absorb the impact during external (repetitive heavy impact) pressure to improve the durability of the rubber asphalt, and plastic resistance at high temperature and crack resistance at low temperature to increase

The SBS (Styrene Butadiene Styrene) forms a network with asphalt to improve interfacial adhesion to increase high elasticity, heat resistance, tensile strength and plastic deformation resistance, and cracks and breakages occur in low temperature environments in winter and runoff at high temperatures. can be improved

The butadiene chain block of the high elastic copolymer of the styrenic thermoplastic polymer reacts with maltene such as an aromatic compound of petroleum asphalt by heat and shear force, and the volume swells by about 20%, increasing the physical crosslinking point and increasing the density of the network structure.

As an example of the polymer polymerized with the styrenic polymer, the EPP polymer (tentative name) is obtained by polymerization of SEBS and PP, and is a type of TPE (Thermo plastic elastomer) that is soft and has strong tensile strength to suppress breakage during external pressure. It has polarity, compatibility with asphalt, and excellent weather resistance, making the product durable.

When less than 1 wt% of a styrenic thermoplastic polymer is added to 100 wt% of the self-repairing rubber asphalt composition, the high modulus of elasticity is lowered, the impact absorption rate is lowered, the durability is lowered, and when more than 20 wt% is added, 200 °C Because mixing is possible at a higher temperature than that, energy consumption and asphalt are easily oxidized, making economical and quality control difficult.

Among the self-repairing rubber asphalt composition, the olefinic thermoplastic polymer is TPE (thermo plastic elastomer), which is soft and has strong tensile strength to improve breakage inhibition under external pressure. When less than 1 wt% of the olefinic thermoplastic polymer is added, the effect of inhibiting breakage on tensile strength and pressure is insignificant, and when it exceeds 10 wt%, compatibility with straight asphalt is remarkably deteriorated.

Here, when the straight asphalt and the olefinic thermoplastic polymer are mixed, the olefinic thermoplastic polymer has somewhat poor compatibility with the straight asphalt, so a compatibilizer capable of increasing the affinity with the asphalt is required. When mixed first, a supramolecular complex network having ionic bonds is formed in the network structure of the straight asphalt, and compatibility with the olefinic thermoplastic polymer is improved at the same time.

Since the styrene-based and olefin-based thermoplastic polymers used in the present invention have reversible covalent bonds, rubber asphalt having excellent strength can be obtained.

More specifically, the mechanical properties are improved by the styrene chain block, which is a hard polymer of the block copolymer, and the ionomer is subjected to shear stirring so that the ionomer can be evenly mixed with the butadiene or isoprene chain block, which is a soft polymer expanded when mixed with asphalt. It was induced to form a complex network structure with the non-covalent bonds (ionic bonds) of the block copolymer and the covalent bonds of the block copolymer.

For high tensile strength, it is preferable to use styrene-butadiene rubber with a styrene content of 25% to 50% relative to 100% butadiene. The higher the styrene content, the higher the temperature cracking resistance. If the butadiene content is too large, it is easy to age and the plastic deformation resistance is lowered.

The reinforcing agent in the self-repairing rubber asphalt composition uses natural asphalt such as gilsonite, blown asphalt, polyurethane, epoxy, etc., and flows down at high temperatures when straight asphalt is used alone, and is damaged even by a small external impact, each There is a problem in that a phenomenon of easy separation occurs due to a decrease in bonding strength with the mixture.

In the present invention, by adding one or two or more of natural asphalt, such as gilsonite and TLA, or petroleum, coal-based pitch, or blown asphalt, as a reinforcing agent, asphaltene content can be increased to obtain asphalt with high rigidity. It is preferable to mix 1 to 20% by weight of the reinforcing agent based on 100% by weight of the total self-repairing rubber asphalt composition.

Among the self-repairing rubber asphalt composition, the tackifier is one or more of acrylic resin, phenolic resin, terpene resin, natural resin, petrochemical resin, PVB resin, and polybutene, and the bonding strength, adhesive strength, and heat resistance between each polymer. etc., a high molecular weight rosin ester obtained by reacting a natural resin with a petrochemical resin may be added, or a terpene phenolic resin may be added to maximize post adhesion, heat resistance, and bonding strength.

When less than 1% by weight of the tackifier is added to 100% by weight of the total amount of the self-repairing rubber asphalt composition, the bonding performance improvement effect and the adhesion improvement effect between the mixed raw materials are insignificant, and when more than 10% by weight is added, the viscosity increases excessively, Agglomeration occurs during production and installation of asphalt mixtures, and the product price increases due to an increase in the content of tackifiers, which are relatively more expensive than low-cost raw materials. The adhesive function is rather deteriorated.

A method of manufacturing the waterproofing material of the present invention self-repairing rubber asphalt having the composition as described above will be described as follows.

60 ~ 80% by weight of straight asphalt, 10 ~ 30% by weight of process oil, and 1 ~ 10% by weight of ionomer are put into a heating stirrer and heated and mixed at 140 ~ 190℃ for 2 ~ 3 hours to produce the first mixture The first mixture forming step is carried out.

That is, in the present invention, the ionomer of Ethylene Methylacrylic Acid (EMAA) or Ethylene Acrylic Acid (EAA) in straight asphalt (AP3, AP5, etc.) is first heated and mixed at a temperature of 140 to 190° C. for 2 to 3 hours. Asphalt and polymer By first mixing the ionomer with good compatibility with the rubber asphalt, a supramolecular complex network having ionic bonds is formed in the network structure of the rubber asphalt, and the self-healing performance as well as the compatibility with the olefinic thermoplastic polymer is improved at the same time.

That is, the mechanical properties are improved by the styrene chain block, which is a hard polymer of the block copolymer, and the non-covalent bonding of the ionomer ( It induces the formation of a complex network structure having ionic bonds) and covalent bonds of the block copolymer.

And, when the first mixture is produced, 1 to 20% by weight of a styrene-based thermoplastic polymer and 1 to 10% by weight of an olefin-based thermoplastic polymer are added, and then heated and mixed at a temperature of 140 to 190° C. for 2-3 hours to obtain a second mixture. Carry out the second mixture production step to produce the.

The styrene-based thermoplastic polymer or the olefin-based thermoplastic polymer has a reversible covalent bond, so that it is possible to obtain rubber asphalt having excellent strength.

Here, for high tensile strength, it is preferable to use a styrene-butadiene rubber having a styrene content of 25% to 50% relative to 100% butadiene, and the higher the styrene content, the higher the temperature crack resistance. If it is difficult and the butadiene content is too large, it is easy to age and the plastic deformation resistance is lowered.

As a result, since the olefinic thermoplastic polymer has poor compatibility with asphalt, straight asphalt and the ionomer must first be heated and shear-stirred in order to increase the affinity with asphalt to complete the second mixture in which the olefinic thermoplastic polymer is mixed. will be.

When the second mixture is produced, 1 to 10% by weight of a reinforcing agent, 1 to 20% by weight of a filler, and 1 to 10% by weight of a tackifier are added and heated and mixed at a temperature of 140 to 190°C for 2-3 hours, self-repairing type A rubber asphalt waterproofing material is manufactured.

As the filler, by adding one or two or more of minerals such as talc, calcium carbonate, slaked lime, black carbon, cellulose or polyester fiber, clay, sawdust, and wax, the bonding strength and price reduction effect and adhesion are improved by polarity. By absorbing the plasticizer, the mixture becomes soft, improving cold resistance and preventing dripping at high temperatures.

On the other hand, the manufacturing method of the present invention self-repairing rubber asphalt mixture having the composition as described above will be described as follows.

The first mixture generation step and the second mixture generation step of the self-repairing rubber asphalt waterproofing material are performed in the same manner, and when the second mixture is formed, the reinforcing agent 1 to 20% by weight and the tackifier 1 to 10% by weight is added and heated and mixed at a temperature of 140 to 190° C. for 2-3 hours to prepare a self-repairing rubber asphalt binder, and when the self-repairing rubber asphalt binder is produced, the heated aggregate is measured and A self-repairing rubber asphalt mixture for asphalt concrete pavement is prepared by mixing 5 to 20% by weight of an asphalt binder and 80 to 95% by weight of aggregate.

Here, the aggregate added to the self-repairing rubber asphalt mixture for asphalt concrete pavement is 13mm to 20mm in size of aggregate mixed as the maximum aggregate in the case of permeable asphalt, and mixed as the maximum aggregate in the case of impervious waterproof asphalt It is preferable to use the size of the aggregate to be 4.75mm ~ 10mm.

On the other hand, when the self-repairing rubber asphalt waterproofing material and the self-repairing rubber asphalt mixture are prepared as described above, the waterproofing method using the self-repairing rubber asphalt and the paving method using the self-repairing rubber asphalt can be carried out.

First, a waterproofing method using a self-repairing rubber asphalt according to the present invention will be described with reference to FIGS. 1 and 2 as follows.

Removes foreign substances such as rust or latency of the base surface 102 using shot blasting or water jet including a vacuum suction device, and maintains the surface dry state so that the water content value measured with a high-frequency moisture meter is 10% or less Perform a surface cleaning step (S1).

And, to form an adhesive layer 104 by applying an absorption prevention waterproofing material or asphalt-based or resin-based adhesive to the base surface 102 of the structure by the base surface cleaning step (S1) with a roller and a spreader of 0.2 to 0.5 L/m2 or more The adhesive layer forming step (S2) is performed.

In addition, the self-repairing rubber asphalt or self-repairing rubber asphalt waterproofing material is placed on the upper portion of the adhesive layer 104 by 0.5 to 3.0 mm using a push stick or application equipment to form a self-healing coating waterproofing layer 106. A forming step (S3) is performed.

Since the hydrogen bond between the ionomer and asphalt, which is one of the core of self-healing self-healing rubber asphalt, can be easily oxidized by ultraviolet rays, in the present invention, an antioxidant function is applied to the sheet-type waterproof packaging fiber 202 by using carbon black, etc. By adding it, oxidation and cracking are prevented.

That is, rubber asphalt or blown asphalt containing an antioxidant is impregnated or coated on 50 g/m or more of nonwoven fabric or felt on the upper part of the waterproofing layer, so that a sheet-type waterproof packaging fiber 202 with a thickness of 1.0 to 3.0 mm is applied by manpower or a sheet installation device. The sheet layer forming step (S4) of installing the sheet layer 108 by using butt joints or overlapping installations of 50 mm or more and sealing the joint joints between sheets with a coating film waterproofing material is performed.

Here, it is preferable that the coating film waterproof layer 106 and the sheet layer 108 have a combined thickness of 2.0 to 4.0 mm.

The sheet-type waterproof packaging fiber 202 for preventing oxidation and cracking is rubber asphalt or blown asphalt containing an antioxidant in a nonwoven fabric or felt of 50 g/m or more made of fibers with excellent heat resistance such as glass fiber, polyester fiber, carbon fiber, etc. As shown in FIG. 2 in the form of a sheet having a thickness of 1.0 to 3.0 mm while being impregnated or coated, it is installed on the upper portion of the rubber asphalt compound (film waterproofing layer).

The antioxidant may be a mixture of a UV-blocking agent that is carbon black or titanium dioxide and HALS or a phenol-based primary antioxidant, and it is preferable to use carbon black and HALS.

Primary antioxidant, a free radical scavenger, makes unstable free radicals (radicals) generated by oxidation into a stable form. When mixed with asphalt, the resistance to plastic deformation of asphalt is improved.

In the present invention, carbon black in the form of a lump may be milled into a powder of 0.075 mm or less, and thus, oxidation of rubber asphalt that is melted and mixed at a high temperature can be prevented.

It is manufactured by mixing black carbon or HALS with rubber asphalt or blown asphalt by heating, melting, shearing, stirring, and then coating the core substrate made of fibers with excellent heat resistance or impregnating the core substrate with the melt-mixed asphalt solution.

In particular, the sheet-type waterproof packaging fiber 202 may use a mixture of 50 g/m or more of commonly used non-woven fabric or woven fabric and grid-type fiber, and if a lot of durability is required, a grid on the top of the non-woven fabric or woven fabric It is preferable to install the mesh network 204 having a size of 5 to 20 mm.

Here, it is preferable that the sheet-type waterproof packaging fiber 202 has a mesh network 204 having a grid size of 5 to 20 mm installed thereon.

Damage to the sheet-type waterproof packaging fiber 202 due to an external impact can be prevented by the mesh network 204 .

The sheet-type waterproof packaging fiber 202 not only prevents loss of more than molecular units while reinforcing the tensile strength of the self-healing compound layer (film waterproof layer) located below it, but also suppresses the growth of microcracks through strength reinforcement and stress absorption It can do this and plays a role in suppressing the occurrence of reflection cracks generated from the bottom plate.

In addition, by adding a UV blocking function to the sheet-type waterproof packaging fiber 202, it is possible to obtain the effect of preventing cracks by enhancing the tensile strength of the compound layer and preventing loss (bleeding) of more than a molecular unit and at the same time blocking UV rays.

Meanwhile, a paving method using the self-repairing rubber asphalt composition according to the present invention will be described with reference to FIGS. 3 and 4 as follows.

The packaging method using the self-repairing rubber asphalt composition is the same as the substrate cleaning step (S1) and the adhesive layer forming step (S2) of the waterproofing method using the self-repairing rubber asphalt composition, the substrate cleaning step (S11), the adhesive layer forming step Since (S22) is performed, a detailed description thereof is omitted.

And, as described above, in the packaging method using the self-repairing rubber asphalt composition, after the adhesive layer forming step (S22) is performed, the self-repairing rubber asphalt mixture is applied to the upper portion of the adhesive layer 104 to a thickness of 2 to 10 cm. The pavement layer forming step (S33) of installing and installing the asphalt concrete pavement layer 110 is completed.

Here, in the paving method using the self-repairing rubber asphalt composition described above, the self-repairing rubber asphalt mixture was installed in a state where a waterproofing layer was not formed on the lower portion of the pavement layer 110, but a waterproofing layer was formed under the pavement layer 110 Thus, a paving method using a self-repairing rubber asphalt composition can be carried out.

In order to form a waterproof layer on the lower part of the packaging layer 110, as shown in FIG. 5, after the adhesive layer forming step (S22) is performed, a self-repairing rubber asphalt, a self-repairing type, on the upper portion of the adhesive layer 104 A coating film waterproofing layer forming step (S23) of forming a self-healing coating waterproofing layer 106 by installing 0.5 to 3.0 mm of any one of the rubber asphalt waterproofing materials is carried out, and the asphalt containing an antioxidant on the coating film waterproofing layer 106 is a nonwoven fabric Alternatively, after performing the sheet layer forming step (S24) of forming the sheet layer 108 by laying the sheet-type waterproof packaging fiber 202 having a thickness of 1.0 to 3.0 mm formed by being impregnated or coated in felt, on top of the sheet layer 108 A pavement layer forming step (S33) of installing the asphalt concrete pavement layer 110 by installing the self-repairing rubber asphalt mixture described above to a thickness of 2 to 10 cm may be performed.

Therefore, it is possible to realize the waterproofing method and the paving method at the same time by forming the coating film waterproofing layer in the pavement method using the self-repairing rubber asphalt composition.

Here, it is preferable to install a mesh network 204 having a grid size of 5 to 20 mm on the sheet-type waterproof packaging fiber 202 as shown in FIG. 6 .

The mesh network 204 can prevent damage to the sheet-type waterproof pavement fiber 202 due to compaction of the upper asphalt concrete aggregate during asphalt concrete pavement construction, and the pavement fibers are attached to the tracks or wheels of heavy paving equipment and rolled up. damage can be prevented.

The sheet-type waterproof packaging fiber 202 in the form of a woven or non-woven fabric located at the bottom reinforces the tensile strength of the self-healing compound layer (film waterproof layer) located below it, and prevents loss of more than molecular units, as well as strength reinforcement and stress absorption. Through this, the growth of microcracks can be suppressed and the occurrence of reflection cracks generated from the bottom plate is suppressed.

In addition, by adding a UV blocking function to the sheet-type waterproof packaging fiber 202, it is possible to obtain the effect of preventing cracks by enhancing the tensile strength of the compound layer and preventing loss (bleeding) of more than a molecular unit (bleeding) at the same time.

The sheet-type waterproof pavement fiber 202 of the present invention can be integrated with the upper pavement layer 110 by softening the asphalt impregnated in the sheet-type waterproof paving fiber 202 by the construction temperature of the asphalt concrete pavement layer 110. Therefore, a separate tack coating process can be omitted.

In addition, as described above, as the aggregate of the self-repairing type rubber asphalt mixture, in the case of water-permeable asphalt, the size of the aggregate to be mixed as the maximum aggregate is 13 mm to 20 mm, and in the case of the impervious waterproof asphalt, it is mixed as the maximum aggregate. Aggregate size of 4.75mm ~ 10mm is used, in this case, it is preferable to omit the waterproof layer.

More specifically, in the asphalt pavement mixture, the passing rate of the 19mm sieve is 90 to 100% by weight, the passing rate of the 13mm sieve is 40 to 100% by weight, and the passing rate of the 9.5mm sieve is 15 to 60 based on 100% by weight of the mixed aggregate. It is preferable that the weight %, the passage rate of the 4.75 mm sieve is 5 ~ 30 weight %, the passage rate of the 2.36 mm sieve is 2 ~ 15 weight %, and the passage rate of the 0.075 mm sieve is 1 ~ 5 weight %, and the general asphalt mixture such as SMA is 4 ~ 5% The mixing ratio of the aggregate is determined to have a porosity of

The self-repairing rubber asphalt composition according to the present invention is based on intramolecular or intermolecular non-covalent bonds, and several supramolecules are gathered and organized through molecular recognition and self-assembly, so that the supramolecular network is attached to other polymers by attraction between macromolecules, which are supramolecules. By forming the structure, the interaction force between molecules is reformed and it is called a supramolecular network type self-healing polymer, and the self-healing ability of the rubber asphalt composition itself as well as the bonding strength with foreign materials such as fibers or aggregates is excellent, and the high temperature in summer or vehicles The covalent bonds of the polymers in the asphalt rubber composition are reversibly recombined even by environmental and traffic loads, such as, and thus, self-healing is possible without damaging the material several times.

102: base surface 104: adhesive layer
106: coating film waterproof layer 108: sheet layer
110: concrete pavement layer
202: packaging fiber 204: mesh network

Claims (1)

An adhesive layer 104 is formed by removing foreign substances from the base surface 102 of the structure and maintaining the surface dry state (S11), and applying an adhesive to the base surface 102 by the base surface cleaning step (S11). In the packaging method using a self-repairing rubber asphalt composition comprising an adhesive layer forming step (S22),
Including a pavement layer forming step (S33) of installing the asphalt concrete pavement layer 110 by installing a self-repairing rubber asphalt mixture to a thickness of 2 to 10 cm on the adhesive layer 104,
The self-repairing rubber asphalt mixture,
60 ~ 80% by weight of straight asphalt, 10 ~ 30% by weight of process oil, and 1 ~ 10% by weight of ionomer are put into a heating stirrer and heated and mixed at 140 ~ 190℃ for 2-3 hours to produce the first mixture. a step of forming a first mixture;
When the first mixture is produced, 1 to 20% by weight of a styrene-based thermoplastic polymer and 1 to 10% by weight of an olefin-based thermoplastic polymer are added, and then heated and mixed at a temperature of 140 to 190° C. for 2-3 hours to produce a second mixture a second mixture generating step;
When the second mixture is produced, 1 to 20% by weight of a reinforcing agent and 1 to 10% by weight of a tackifier are added and heated and mixed at a temperature of 140 to 190° C. for 2 to 3 hours to prepare a self-repairing rubber asphalt binder; ;
When the self-repairing rubber asphalt binder is produced, 5 to 20% by weight of the self-repairing rubber asphalt binder and 80 to 95% by weight of the aggregate are mixed to prepare a self-repairing rubber asphalt mixture,
In the case of water-permeable asphalt, the size of the aggregate mixed as the maximum aggregate is 13mm to 20mm, and in the case of the impermeable waterproof asphalt, the size of the aggregate mixed as the maximum aggregate is 4.75mm to 10mm. A pavement method using a repair-type rubber asphalt composition.

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