JP2021165470A - Road surface pavement repairing material, manufacturing method of road surface pavement repairing material, and road surface pavement repairing method - Google Patents

Abstract

To provide a road surface pavement repairing material having flexibility capable of withstanding vibration received by a road surface and capable of long-term preservation.SOLUTION: A road surface pavement repairing material comprises countless granulated bodies, and is constituted of an aggregate as a core and an adhesive layer obtained by coating the aggregate with an adhesive material, wherein the surface layer of the adhesive layer is made non-adhesive. The adhesive material forming the adhesive layer contains a resin composition and asphalt, and the non-adhesive layer of the surface layer of the adhesive layer is formed of a saponified fatty acid by a fatty acid and a saponifying material.SELECTED DRAWING: None

Description

The present invention relates to a road surface pavement repair material for repairing a road surface paved with asphalt, concrete, or the like, a method for manufacturing a road surface pavement repair material, and a road surface pavement repair method.

The road surface on which automobiles travel is paved with asphalt or concrete. The paved road surface is cracked or damaged due to new construction or maintenance work such as gas pipes and water pipes, ground deformation due to earthquakes, vibration caused by running automobiles, freezing and thawing due to water entering, or deterioration over time. Or damage such as depression may occur. When the road surface is damaged, the road surface is temporarily restored or restored by the road surface pavement repair material. The road surface pavement repair material needs to be flexible enough to withstand the vibration received by the road surface, and a road surface pavement repair material having a flexible binder such as asphalt as a main binder has been used. However, in order to use (construct) a road surface pavement repair material whose main binder is a flexible binder such as asphalt, it is necessary to heat it in order to melt the asphalt and the like, so that it can be easily constructed. It wasn't a thing. For this reason, road surface pavement repair materials that can be constructed even at room temperature have come to be used.

As a conventional road surface pavement repair material that can be constructed even at room temperature, Patent Document 1 describes a road surface pavement repair material containing asphalt, lubricating oil, slaked lime, steel slag, and aggregate. Patent Document 2 describes a road surface pavement repair material containing asphalt, petroleum lubricating oil, fatty acid and cement, and aggregate. Further, Patent Document 3 describes a road surface pavement repair material containing asphalt, a drying oil, a reaction accelerator, and an aggregate. These are made into a repair material with a viscosity that can be applied by impregnating asphalt as the main binder with lubricating oil, etc., and the repair material is hardened (high) with a hardening accelerator such as slaked lime, cement or a reaction accelerator, and water. (Viscosity) is used to ensure the physical strength of the repair material.

Japanese Unexamined Patent Publication No. 2003-327835 Japanese Patent No. 6458194 JP-A-2018-199779

However, the conventional road surface pavement repair material is a so-called moisture-curing type repair material that increases the physical strength by reacting a curing accelerator such as slaked lime, cement or a reaction accelerator with moisture (moisture). Therefore, there is a problem that the conventional road surface pavement repair material is not suitable for long-term storage.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide a road surface pavement repair material capable of long-term storage while having flexibility that can withstand vibrations received by the road surface.

The road surface pavement repair material according to the present invention is a road surface pavement repair material composed of innumerable granulated bodies.
The granulated body is composed of a core aggregate and an adhesive layer made of an adhesive material that covers the aggregate.
The surface layer of the adhesive layer is non-adhesive.

According to the road surface pavement repair material of the present invention, since the aggregate has an adhesive layer coated with the adhesive material, the adhesive layers of the aggregates are pressed against each other by pressing the road surface pavement repair material against the construction site. Adhesively form an integrated repair layer. Since the repair layer is integrated with an adhesive material, it has flexibility to withstand the vibration received by the road surface at the construction site. Further, since the surface layer of the adhesive layer is non-adhesive, the road surface pavement repair material does not adhere and integrate unless pressed, so that it can be stored for a long period of time. ..

Here, in the road surface pavement repair material, the adhesive material can be made to contain a resin composition and asphalt.

According to this, asphalt can lower the melting point of the resin composition, so that the manufacturability can be improved.

Further, in the road surface pavement repair material, it is possible that the surface layer of the adhesive layer is non-adhesive with the saponified fatty acid.

According to this, the road surface pavement repair material can be stored for a long period of time.

Here, the method for manufacturing the road surface pavement repair material according to the present invention is the above-mentioned method for manufacturing the road surface pavement repair material.
A coating step of stirring the aggregate and the adhesive and coating the aggregate with the adhesive.
A saponification step in which a fatty acid is coated on the surface layer of an adhesive layer formed by coating the aggregate with the adhesive, and the fatty acid is saponified using a saponifying material.
Can be included.

According to the method for producing a road surface pavement repair material of the present invention, the road surface pavement repair material forms an adhesive layer in which an adhesive material is coated on an aggregate, and the surface layer of the adhesive layer is saponified with a fatty acid and a saponifying material, and is not. It can be made sticky. As a result, the road surface pavement repair material can be stored for a long period of time while having flexibility.

Here, in the method for producing a road surface pavement repair material, the adhesive material contains a resin composition and asphalt.
The aggregate may be coated with the heat-dissolved adhesive.

According to this, the resin composition and the asphalt can be compatible with each other in a short time by heat melting, so that the manufacturability can be improved.

Here, the road surface pavement repair method according to the present invention is characterized in that the repaired portion is filled with the above-mentioned road surface pavement repair material.

According to the road surface pavement repair method of the present invention, the road surface pavement repair material can be easily applied to the road surface pavement.

According to the road surface pavement repair material of the present invention, it is possible to store the road surface for a long period of time while having flexibility that can withstand the vibration received by the road surface.

Hereinafter, embodiments of the road surface pavement repair material according to the present invention will be described. The meaning of each term in the present specification and claims is as follows.

“%” (In compounding units) means “% by mass” unless otherwise noted. The "median particle size" means the median diameter (d50) determined by the JIS standard sieve (JIS Z 8801-1: 2019).

The road surface pavement repair material of the embodiment can be used for repairing a road surface on which an automobile or an aircraft travels, a floor in a factory, or the like. It can also be used for emergency repair of wet and soft ground, smoothing of uneven ground, and prevention of weeds such as walking passages. The road surface pavement repair material consists of innumerable granulation bodies that repair the road surface paved with asphalt, concrete, etc., and is constructed (filled) at the repair site to form an adhesive layer of innumerable granulation bodies of the road surface pavement repair material. By adhering the adhesive materials to each other, an integrated road surface pavement repair layer is formed.

The road surface pavement repair material is composed of innumerable granulated bodies, has a core aggregate and an adhesive layer in which the aggregate is coated with an adhesive material, and the surface layer of the adhesive layer is non-adhesive. It is a thing. The pressure-sensitive adhesive material forming the pressure-sensitive adhesive layer contains a resin composition and asphalt, and the surface layer of the pressure-sensitive adhesive layer is formed with a non-adhesive layer composed of a saponified fatty acid by a fatty acid and a saponifying material. It should be noted that covering the aggregate with the adhesive is not limited to covering the entire surface of the aggregate with the adhesive, and it is sufficient if the covering area is 50% or more of the surface area of the aggregate. Is. This is because, as the road surface pavement repair material of the embodiment, the road surface pavement repair materials can be suitably fused to each other.

The resin composition (rubber) forming the adhesive material can be either natural rubber or synthetic rubber, and for example, isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene rubber (SBR), and the like. Chloroprene rubber (CR), nitrile rubber (NBR), isobutyene isoprene rubber (butyl rubber) (IIR), ethylene propylene rubber (EPM, EPDM), chlorosulfonated polyethylene (CSM), acrylic rubber (ACM), fluororubber (ACM) ), Epichlorohydrin rubber (CO, ECO), urethane rubber (U), silicone rubber (Si, Q), methyl silicone rubber (MQ), vinyl / methyl silicone rubber (VMQ), phenyl / methyl silicone rubber (PMQ), etc. Can be used. Among these, ethylene propylene rubber, styrene butadiene rubber, and butyl rubber, which are excellent in weather resistance and durability, can be preferably used, and butyl rubber, which is particularly excellent in durability, can be more preferably used. From the viewpoint of maintaining adhesiveness, these resin compositions (rubbers) are preferably unvulcanized rubber.

Asphalt is used as a flux that lowers the melting point of a resin composition when the resin composition is heated and melted in the production of a road surface pavement repair material. As the asphalt, natural asphalt, petroleum asphalt (straight asphalt, blown asphalt) specified in JIS K 2207: 2006 and the like can be used. Among these, blown asphalt, which is an individual at room temperature and has excellent handleability, can be preferably used. The amount of asphalt added to the resin composition is preferably 10 to 60 parts by mass with respect to 100 parts by mass of the resin composition. This is because the melting point of the resin composition can be preferably lowered. When the amount of asphalt added is less than 10 parts by mass with respect to 100 parts by mass of the resin composition, the effect as a flux is insufficient, and energy is required to heat and dissolve the resin composition. There is a risk of becoming an economy. On the other hand, if it exceeds 60 parts by mass, the adhesive material becomes hard, the road surface pavement repair materials do not fuse with each other, the strength of the adhesive layer after construction is not satisfied, and the wear resistance due to the passage of the vehicle may not be satisfied. be. More preferably, the amount of asphalt added to the resin composition is 20 to 50 parts by mass with respect to 100 parts by mass of the resin composition.

A plasticizer can be added to the resin composition forming the pressure-sensitive adhesive. By adding a plasticizer, the road surface pavement repair material can exert the adhesiveness of the adhesive material even in a low temperature environment such as winter, and the adhesive layers made of the adhesive material of innumerable granulated bodies can be exhibited. Can be adhered to form a repair layer. It also acts as a flux in the production of road surface pavement repair materials, and can lower the melting point of the resin composition. As the plasticizer, a plasticizer suitable for the type of resin composition used as the pressure-sensitive adhesive can be used, but as general-purpose plasticizers, paraffin-based plasticizers, naphthen-based plasticizers, and aliphatic hydrocarbon-based plasticizers can be used. , Aromatic carbonized water-killing plasticizers and the like can be used. Commercially available products can be used for these. The amount of the plasticizer added to the resin composition is preferably 5 to 60 parts by mass with respect to 100 parts by mass of the resin composition. This is because the melting point can be lowered during the production of the road surface pavement repair material, which can exhibit the adhesiveness of the adhesive even in a low temperature environment. If the amount of the plasticizer added is less than 5 parts by mass with respect to 100 parts by mass of the resin composition, the effect of plasticizing is not satisfied, and the adhesive layers made of the adhesive material may not adhere to each other in a low temperature environment. .. In addition, there is a risk that the action as a flux will not be exhibited during the production of road surface pavement repair materials. On the other hand, if it exceeds 60 parts by mass, the amount of the plasticizer added becomes excessive, and when the road surface pavement repair material is filled (constructed) in the repair site to form the repair layer of the road surface pavement repair material, The flexibility of the repair layer becomes apparent, and it may be deformed by the passage of a vehicle, and the deformation resistance may not be satisfied. More preferably, the amount of the plasticizer added to the resin composition is 10 to 40 parts by mass with respect to 100 parts by mass of the resin composition.

The fatty acid is an acid that coats the surface of the adhesive material coated on the aggregate and saponifies the carboxy group with the saponifying material described below to form a non-adhesive layer that makes the surface layer of the adhesive material non-adhesive. .. The fatty acid can be used regardless of whether it is a saturated fatty acid or an unsaturated fatty acid. Saturated fatty acids include butyric acid (4: 0), valeric acid (5: 0), caproic acid (6: 0), heptyl acid (7: 0), capric acid (8: 0), pelargonic acid (9: 0). ), Capric acid (10: 0), lauric acid (12: 0), myristic acid (14: 0), pentadecyl acid (15: 0), palmitic acid (16: 0), margaric acid (17: 0), Stealic acid (18: 0), arachidic acid (20: 0), behenic acid (22: 0), lignoceric acid (24: 0) and the like can be used. As unsaturated fatty acids, palmitoreic acid (16: 1 (n-7)), oleic acid (18: 1 (n-9)), baxenoic acid (18: 1 (n-7)), linoleic acid (18: 2) (N-6)), (9,12,15) -linolenic acid (18: 3 (n-3)), (6,9,12) -linolenic acid (18: 3 (n-6)), d. Leostearic acid (18: 3 (n-5)), 8,11-eicosadienoic acid (20: 2 (n-9)), 5,8,11-eicosatrienoic acid (20: 3 (n-9)) ), 5,8,11-Eicosatetraenoic acid (20: 4 (n-6)) and the like can be used. The description in parentheses following the name of the fatty acid is a numerical expression (abbreviated name) of the fatty acid. More preferably, the saturated fatty acids caproic acid (6: 0), heptyl acid (7: 0), capric acid (8: 0), pelargonic acid (9: 0), caprin, which have excellent stability of the non-adhesive layer. Acid (10: 0), lauric acid (12: 0), unsaturated fatty acids, palmitoleic acid (16: 1 (n-7)), oleic acid (18: 1 (n-9)), bacenoic acid (18) 1 (n-7)), linoleic acid (18: 2 (n-6)), (9,12,15) -linolenic acid (18: 3 (n-3)), (6,9,12) -Linolenic acid (18: 3 (n-6)), eleostearic acid (18: 3 (n-5)), can be used. More preferably, the saturated fatty acids heptyl acid (7: 0), caprylic acid (8: 0), pelargonic acid (9: 0), the unsaturated fatty acid palmitoleic acid (16: 1 (n-7)), Oleic acid (18: 1 (n-9)) and vaccenic acid (18: 1 (n-7)) can be used.

The amount of the fatty acid added to the resin composition is preferably 3 to 30 parts by mass with respect to 100 parts by mass of the resin composition. This is because the surface of the adhesive layer made of the adhesive material for the road surface pavement repair material can be suitably covered. When the amount of fatty acid added is less than 3 parts by mass with respect to 100 parts by mass of the resin composition, the amount of fatty acid is insufficient with respect to the surface of the adhesive layer made of the adhesive material of the road surface pavement repair material, and the amount of fatty acid is insufficient. It may not be possible to cover the entire surface. On the other hand, if it exceeds 30 parts by mass, the amount of fatty acid becomes excessive with respect to the surface of the adhesive layer made of the adhesive material of the road surface pavement repair material, which may be uneconomical. More preferably, the amount of the fatty acid added to the resin composition is 8 to 20 parts by mass with respect to 100 parts by mass of the resin composition.

The saponifying material is an alkali-imparting material that saponifies the carboxy group of the fatty acid that covers the surface of the pressure-sensitive adhesive coated on the aggregate to give alkali that makes the surface layer of the pressure-sensitive adhesive non-adhesive. By making the surface layer of the adhesive material non-adhesive, the road surface pavement repair material does not adhere and integrate unless pressed, so that it can be stored for a long period of time. It can also prevent pavement (material sticking and hardening) during storage.

As a saponifying material, lithium silicate compound, sodium hydroxide, sodium carbonate, sodium hydrogen carbonate, sodium oxide, sodium silicate, potassium hydroxide, potassium carbonate, potassium hydrogen carbonate, potassium oxide, potassium silicate, magnesium hydroxide, carbonic acid Magnesium, magnesium oxide, magnesium silicate, calcium hydroxide, calcium carbonate, calcium oxide, calcium silicate, cement or a mixture thereof can be used. The cements are ordinary Portland cement, early-strength Portland cement, ultra-early-strength Portland cement, moderate-heat Portland cement, low-heat Portland cement, sulfate-resistant Portland cement, and blast furnace, as defined in Portland cement (JIS R 5210: 2019). Cement (JIS R 5211: 2019), fly ash cement (JIS R 5213: 2019), eco-cement (JIS R 5214: 2019), alumina cement (JIS R 2521: 1995) and the like can be used.

The amount of the saponifying material added to the resin composition is preferably 30 to 60 parts by mass with respect to 100 parts by mass of the resin composition. This is because the surface of the adhesive layer made of the adhesive material for the road surface pavement repair material can be suitably non-adhesive. When the amount of the saponifying material added is less than 30 parts by mass with respect to 100 parts by mass of the resin composition, the amount of the saponifying material is insufficient with respect to the surface of the adhesive layer made of the adhesive material for the road surface pavement repair material, and the saponifying material is adhered. The entire surface of the layer may not be non-adhesive and saponification may occur during storage of the road surface pavement repair material. On the other hand, if it exceeds 60 parts by mass, the amount of the saponifying material becomes excessive with respect to the surface of the adhesive layer made of the adhesive material of the road surface pavement repair material, which may be uneconomical. More preferably, the amount of the saponifying material added to the resin composition is 30 to 50 parts by mass with respect to 100 parts by mass of the resin composition.

The aggregate is a small body that is the core of the road surface pavement repair material, and is coated with an adhesive material to form a granulated body of the road surface pavement repair material. As the aggregate, crushed stone, crushed sand, silica sand, cold water stone (crushed limestone), selben (crushed sanitary ware) and a combination thereof can be used. Among these, crushed stone, crushed sand, silica sand, and cold water stone can be preferably used because they are inexpensive and easily available.

The particle size (median particle size) of the aggregate is preferably 0.5 to 10 mm. This is because the workability of road surface pavement repair is excellent and the strength of the road surface pavement repair body is excellent. If the particle size of the aggregate is less than 0.5 mm, the strength of the road surface pavement repair body may be insufficient. On the other hand, if it exceeds 10 mm, the workability of road surface pavement repair may be inferior. More preferably, it is 1 to 7 mm.

The blending amount of the aggregate with respect to the adhesive material is preferably 700 to 2200 parts by mass with respect to 100 parts by mass of the adhesive material. This is because the adhesiveness of the road surface pavement repair material can be suitably exhibited. When the amount of aggregate added is less than 700 parts by mass with respect to 100 parts by mass of the adhesive material, the amount of adhesive material is excessive with respect to the aggregate, and the repair layer formed from the road surface pavement repair material is flexible. There is a risk that the property will become apparent and deform due to the passage of vehicles, and the deformation resistance will not be satisfied. On the other hand, if it exceeds 2200 parts by mass, the adhesive material is insufficient for the aggregate, the road surface pavement repair materials do not fuse with each other, the strength of the repair layer after construction is not satisfied, and the wear resistance due to the passage of the vehicle. May be inferior. More preferably, the amount of the aggregate added to the pressure-sensitive adhesive is 900 to 1,500 parts by mass with respect to 100 parts by mass of the pressure-sensitive adhesive material. From the above, the preferable range of the ratio of the adhesive material to the aggregate (adhesive material / aggregate) is 4.5 to 14.3%, and the more preferable range is 6.7 to 11.1%. ..

The road surface pavement repair material may contain various additives in addition to the above-mentioned raw materials depending on the purpose. As various additives, algae and antifungal agents that prevent the formation of mold on the road surface pavement repair material, rust preventive agents that prevent the generation of rust, fly ash as a fine powder that fills the voids generated in the road surface pavement repair material, Colorants or pigments that add color to road surface pavement repair materials, such as silica fume, blast furnace slag, limestone, silica sand, and talc, can be used as needed.

Next, a method of manufacturing the road surface pavement repair material of the embodiment will be described. In the road surface pavement repair material of the embodiment, a coating step of coating an aggregate with an adhesive material to form an adhesive layer, and a coating process performed after the coating step, in which a fatty acid is coated on the surface layer of the adhesive layer and a carboxy group of the fatty acid is saponified. Manufactured by a saponification process, which saponifies.

The coating step, which is the first step, is a step of coating the aggregate with an adhesive material to form an adhesive layer. As a raw material, the pressure-sensitive adhesive material becomes a pressure-sensitive adhesive material by heating and dissolving a resin composition, asphalt, and an additive such as a plasticizer to form a mixture. The adhesive is agitated with the aggregate in a heated state and coats the aggregate to form an adhesive layer.

The set temperature of the melting furnace when the raw material of the adhesive material is heated and melted is preferably 200 to 300 ° C. This is because the raw material of the adhesive material can be efficiently melted by heating. If the set temperature of the melting furnace is less than 200 ° C., it takes time to melt and the production efficiency may be deteriorated. On the other hand, if the temperature exceeds 300 ° C., the resin composition may be altered and the adhesive material may be altered. More preferably, the set temperature of the melting furnace at the time of heating and melting is 200 to 250 ° C., and even more preferably 200 to 230 ° C.

The heat-dissolved adhesive material is mixed and stirred together with the aggregate material to cover the aggregate material and form an adhesive layer. A paddle mixer is used for stirring, and the adhesive material and the aggregate are cooled by continuing the stirring. Stirring is continued until the next saponification step.

The saponification step is a step of coating the surface layer of the pressure-sensitive adhesive layer in which the aggregate is coated with the pressure-sensitive adhesive with a fatty acid, and saponifying the carboxy group of the fatty acid with the saponification material.

In the saponification step, first, the fatty acid is sprayed on the aggregate on which the adhesive layer is formed with stirring, and the surface layer of the adhesive layer is coated with the fatty acid. The fatty acid sprayed on the surface layer of the adhesive layer coats the surface layer of the adhesive layer in a state where the hydrocarbon group side is compatible with the adhesive layer which is the adhesive material and the carboxy group side is oriented toward the surface layer side of the adhesive layer. The aggregate (and adhesive layer) at which the fatty acid is sprayed is cooled to 60 ° C. or lower. This is to prevent thermal decomposition of fatty acids.

Next, the saponifying material is sprinkled on the adhesive layer coated with the fatty acid with continuous stirring to saponify the carboxy group of the fatty acid. By saponifying the carboxy group of the fatty acid, a non-adhesive layer having lost its adhesiveness is formed on the surface layer of the adhesive layer made of the adhesive material.

Since the surface layer of the road surface pavement repair material loses its adhesiveness, the road surface pavement repair materials do not adhere to each other and integrate with each other unless they are pressed. On the other hand, when the non-adhesive layer is cracked by being pressed, the adhesive material appears on the surface of the road surface pavement repair material, and the road surface pavement repair materials are in a state where they can be adhered to each other and integrated. ..

The road surface pavement repair material is completed by forming a non-adhesive layer on the surface layer. The road surface pavement repair material is packed in a bag or the like and shipped to a contractor who constructs the road surface pavement repair material. The road surface pavement repair material after shipment does not adhere and integrate (caking) unless pressed, so that it can be stored for a long period of time.

Next, the road surface pavement repair method of the embodiment will be described. In the road surface pavement repair method of the embodiment, the road surface pavement repair material of the embodiment is filled with damaged parts such as cracks, defects, and depressions generated on the road surface, and the road surface pavement is filled with a worker's foot, a compactor, or the like. It presses the repair material.

When the road surface pavement repair material is pressed by the worker's foot or a compactor, the non-adhesive layer is cracked, the adhesive material appears on the surface of the road surface pavement repair material, and the road surface pavement repair material is adhered to each other. Therefore, the road surface pavement repair layer in which the damaged part is repaired is formed by integrating with the shape of the damaged part (filling shape). Since the formed road surface pavement repair layer is integrated with an adhesive material, it has flexibility that can withstand the vibration received by the road surface at the construction site.

The road surface pavement repair material of the embodiment can be implemented even if the configuration is changed to the following form.

In the road surface pavement repair material of the embodiment, the surface layer of the adhesive layer is non-adhesive with saponified fatty acid, but the non-adhesiveness passes, for example, 75 μm (JIS Z 8801-1), such as silica sand powder and limestone powder. It can also be made non-adhesive by coating the surface layer of the adhesive layer with the fine particles. In this case, the temperature of the aggregate and the adhesive layer when coating the fine particles is preferably a high temperature (for example, 100 ° C. or higher). This is because the adhesive material forming the adhesive layer has high adhesiveness, and fine particles can easily coat the surface layer of the adhesive layer.

The non-adhesive can also be made non-adhesive by coating the surface layer of the adhesive layer with a resin paint. In this case, the Tg (glass transition temperature) of the resin paint is preferably 80 ° C. or higher. This is because caking can be suitably prevented. As a resin paint having a Tg of 80 ° C. or higher, use a vinyl chloride resin paint (Tg: 87 ° C.), a methyl methacrylate resin paint (Tg: 90 ° C.), a styrene resin paint (Tg: 100 ° C.), or the like. Can be done.

Hereinafter, the present invention will be described in more detail with reference to Examples. Test Examples 1 to 48 are Examples, and Test Example 49 is a Comparative Example. The composition and performance evaluation results of the road surface pavement repair material are shown in Tables 1 to 4, respectively. The composition of the road surface pavement repair material is described by mass ratio.

表中の原材料の名称には記号を用いた。使用した記号を括弧書きに一般名称又は原材料名を添えて以下に記載する。

Symbols were used for the names of raw materials in the table. The symbols used are listed below in parentheses with the generic name or raw material name.

Crushed stone (Crushed stone No. 7 (particle size (Median particle size: 5 mm)))
Crushed sand (crushed sand (particle size (Median particle size: 2 mm)))
BT (Butyl rubber resin composition (unvulcanized))
SB (Styrene-butadiene rubber resin composition (unvulcanized))
EP (Ethylene Propylene Rubber Resin Composition (Unvulcanized))
BRA (Bloan Asphalt 10-20)
BRB (Bloan Asphalt 30-40)
KA (paraffin-based plasticizer)
KB (naphthenic plasticizer)
KC (Aromatic Hydrocarbon Plasticizer)
SO (fatty acid (oleic acid))
SK (fatty acid (caprylic acid))
ANC (saponification material (ordinary Portland cement))
ABC (Saponification material (blast furnace cement type B))
TA (Other additives (pigments, fine powder fly ash, etc.))
Commercially available products were used for these.

The road surface pavement repair materials of these test examples were tested for the evaluation items described below. It should be noted that the x in the evaluation of the evaluation items described below does not mean that a part of the evaluation items is not satisfied and does not mean that the evaluation items are out of the examples.

(1) Dissolution time The dissolution time is the time required for the pressure-sensitive adhesive raw materials (resin composition, asphalt, plasticizer) to dissolve and become a pressure-sensitive adhesive as an evaluation of efficiency during production. The measurement was carried out using a rubber melting furnace mixer having a capacity of 750 L, and the time required for 500 kg of the adhesive raw material to melt uniformly was measured. Then, those having a dissolution time of 3 hours or less were evaluated as ◯, those having a dissolution time of more than 3 hours and less than 5 hours were evaluated as Δ, and those having a dissolution time of more than 5 hours were evaluated as ×.

(2) Kneading time The kneading time is the time required for the adhesive material to cover the aggregate (crushed stone, crushed sand) as an efficiency evaluation during manufacturing. For the measurement, a paddle mixer (300 L horizontal biaxial forced kneading mixer) was used, and a specified amount of adhesive was used for 200 kg of aggregate, and the time required for uniform coating was measured. Then, those having a kneading time of 1 minute or less were evaluated as ◯, those having a kneading time of more than 1 minute and not more than 3 minutes were evaluated as Δ, and those having a kneading time of more than 3 minutes were evaluated as ×.

(3) Abrasion resistance Abrasion resistance is the wear resistance of the repair layer made of the constructed road surface pavement repair material to the passage of vehicles such as automobiles as a performance evaluation of the product. In the construction of the road surface pavement repair material of the test example, a recessed portion having a diameter of 60 cm and a depth of 5 cm is formed in the asphalt pavement, and the road surface pavement repair material of the test example is used as the repair site, and the height of the construction surface is 1 cm from the asphalt pavement. The pavement was filled to a degree of swelling, and this was performed by pressing 200 times with a foot by an adult male weighing 60 kg. For the products of other companies in Test Example 49, the standard construction was followed. The test was conducted by letting vehicles such as automobiles pass naturally on a general road in Akechi-cho, Kasugai City, Aichi Prefecture for 90 days. For the evaluation, the wear loss was measured from the images taken before and after the test from the fixed point. Then, those having a wear loss of 10% or less of the amount of the constructed road surface pavement repair material were evaluated as ◯, those having more than 10% and within 30% were evaluated as Δ, and those having more than 30% were evaluated as ×.

(4) Deformation resistance Deformation resistance is the deformation resistance of the repair layer made of the constructed road surface pavement repair material to the passage of vehicles such as automobiles as a performance evaluation of the product. The construction and testing of the road surface pavement repair material in the test example are the same as the above wear resistance. For the evaluation, the height and shape of the weight loss were measured from the images taken before and after the test from the fixed point. The weight loss height and shape are within 3 mm and no major deformation abnormality is observed, and those with a weight loss of more than 3 mm and within 5 mm and no major deformation abnormality are shown in Δ5 mm. Those exceeding the above or showing a large deformation abnormality were evaluated as x.

(5) Caking after long-term storage Caking after long-term storage is a state of caking (materials stick and harden) when stored as an evaluation in terms of product storage. In the measurement, the road surface pavement repair material of the test example was naturally stored in a covered warehouse for one year in a state of being packed in a package, and the package was opened to confirm the state. And, in the road surface pavement repair material, there is no lumps that are stuck together and there is no problem in construction, ○, there is lumps but it can be easily broken, and there is no problem in construction. Was evaluated as Δ, and those with lumps that could not be easily broken were evaluated as ×.

(6) Caking after opening Caking after opening is a state of caking of the opened road surface pavement repair material as an evaluation in terms of product storage. For the measurement, the packing body of the road surface pavement repair material is opened, the road surface pavement repair material is left to stand for one day with the packing body opened, and then the road surface pavement repair material is repacked with the packing body and the covered warehouse. The product was naturally stored for 90 days, the package was opened, and the condition was confirmed. And, in the road surface pavement repair material, there is no lumps that are stuck together and there is no problem in construction, ○, there is lumps but it can be easily broken, and there is no problem in construction. Was evaluated as Δ, and those with lumps that could not be easily broken were evaluated as ×.

(7) Material cost For the material cost, the raw material cost of the road surface pavement repair material was compared relative to each other. Then, those that are inexpensive in terms of performance are evaluated as ◯, those that are equivalent to each other are evaluated as Δ, and those that are expensive are evaluated as ×.

(Test Examples 1 to 24)
Test Examples 1 to 24 are test examples in a preferable range, and Test Example 1 is a test example in which the best mode is set. These were excellently evaluated in almost all the evaluation items.

(Test Example 25 to Test Example 27)
Test Examples 25 to 27 are Test Examples in which the asphalt content is slightly lower than that of the resin composition (less than 10 parts by mass with respect to 100 parts by mass of the resin composition). Since the asphalt content was rather low, the dissolution time required 5 hours or more, and the production efficiency was slightly inferior.

(Test Example 28 to Test Example 30)
Test Examples 28 to 30 are Test Examples in which the asphalt content is slightly higher than that of the resin composition (more than 60 parts by mass with respect to 100 parts by mass of the resin composition). Since the asphalt content was rather high, the wear weight loss exceeded 30% in the wear resistance test, and the performance evaluation was slightly inferior. In addition, the material cost was high with respect to the performance.

(Test Examples 31 to 33)
Test Examples 31 to 33 are Test Examples in which the content of the plasticizer is slightly smaller than that of the resin composition (less than 5 parts by mass with respect to 100 parts by mass of the resin composition). Since the content of the plasticizer was rather low, the dissolution time required 5 hours or more, the kneading time exceeded 3 minutes, and the production efficiency was slightly inferior.

(Test Example 34 to Test Example 36)
Test Examples 34 to 36 are Test Examples in which the content of the plasticizer is slightly higher than that of the resin composition (more than 60 parts by mass with respect to 100 parts by mass of the resin composition). Since the content of the plasticizer was rather high, a large deformation abnormality was observed in the deformation resistance test, and the performance evaluation was slightly inferior. In addition, the material cost was high with respect to the performance.

(Test Example 37 to Test Example 39)
In Test Example 37 to Test Example 39, the content of fatty acid and saponifying material is slightly smaller than that of the resin composition (fatty acid is less than 3 parts by mass and saponifying material is less than 30 parts by mass with respect to 100 parts by mass of the resin composition). ) This is a test example. Since the contents of fatty acid and saponification material are rather low, the generation of lumps that cannot be easily broken was confirmed in the caking test after long-term storage and the caking test after opening, respectively, and the performance evaluation was slightly inferior.

(Test Example 40 to Test Example 42)
In Test Examples 40 to 42, the content of fatty acid and saponifying material is slightly higher than that of the resin composition (for 100 parts by mass of the resin composition, the fatty acid exceeds 30 parts by mass and the saponifying material is 60 parts by mass). This is a test example (exceeding). Although there was no problem in production efficiency and performance evaluation, the material cost was high with respect to the performance because the contents of the fatty acid and the saponifying material were slightly excessive.

(Test Example 43 to Test Example 45)
Test Examples 43 to 45 are Test Examples in which the ratio of the adhesive material to the aggregate is slightly high (adhesive material / aggregate exceeds 14.3%). Since the proportion of the adhesive material was rather high, a large deformation abnormality was observed in the deformation resistance test, and the performance evaluation was slightly inferior. In addition, the material cost was high with respect to the performance.

(Test Example 46 to Test Example 48)
Test Examples 46 to 48 are Test Examples in which the ratio of the adhesive material to the aggregate is slightly small (adhesive material / aggregate is less than 4.5%). Since the proportion of the adhesive material was rather small, the kneading time exceeded 3 minutes, and the production efficiency was slightly inferior. Further, in the wear resistance test, the wear weight loss exceeded 30%, and the performance evaluation was slightly inferior.

(Test Example 49)
In Test Example 49, the performance was evaluated using a moisture-curable repair material manufactured by another company. Moisture-curing repair materials manufactured by other companies were inferior in performance evaluation because it was confirmed that lumps that could not be broken were generated in the caking test after long-term storage and the caking test after opening due to the humidity in the air. ..

Claims (6)

It is a road surface pavement repair material consisting of innumerable granulated bodies.
The granulated body is composed of a core aggregate and an adhesive layer made of an adhesive material that covers the aggregate.
A road surface pavement repair material characterized in that the surface layer of the adhesive layer is non-adhesive. The road surface pavement repair material according to claim 1, wherein the adhesive material contains a resin composition and asphalt. The road surface pavement repair material according to claim 1, wherein the surface layer of the adhesive layer is non-adhesive with a saponified fatty acid. The method for manufacturing a road surface pavement repair material according to claim 1.
A coating step of stirring the aggregate and the adhesive and coating the aggregate with the adhesive.
A saponification step in which a fatty acid is coated on the surface layer of an adhesive layer formed by coating the aggregate with the adhesive, and the fatty acid is saponified using a saponifying material.
A method for manufacturing a road surface pavement repair material, which comprises. The pressure-sensitive adhesive contains a resin composition and asphalt.
The method for producing a road surface pavement repair material according to claim 4, wherein the aggregate is coated with the heat-melted adhesive material. A road surface pavement repair method, characterized in that the repaired portion is filled with the road surface pavement repair material according to claim 1.