JP6511680B2 - Asphalt pavement material package and asphalt pavement repair method - Google Patents

Description

  The present invention relates to an asphalt pavement material package used for repairing asphalt pavement and an asphalt pavement repairing method.

  The road on which the vehicle travels is paved to enhance convenience and safety. In particular, asphalt mixtures used in asphalt pavement are widely used as general pavements because materials are easily available nationwide, easy to install, and inexpensive as compared with other materials.

  Asphalt mixtures are generally composed of asphalt and crushed stone, sand, fillers and the like. The asphalt mixture is manufactured by using crushed stone, sand and a filler, adjusting to a predetermined aggregate particle size, heating and mixing with asphalt with a mixer or the like. The asphalt mixture produced here is applied as a base layer or surface layer. Construction is spread by asphalt finisher and compacted by roller to become asphalt pavement.

Asphalt pavement is constantly exposed to traffic loads and environmental loads, and is damaged by being used. The major damage to asphalt pavements are cracks, pitting and loss of flatness, and other damages include steps, pot holes and peeling. A pothole is a hole which an asphalt mixture scatters from the surface of asphalt pavement. Pot holes are mainly caused by flooding due to rain water and snow, etc. When left as they are, asphalt may be lost and holes may be expanded, further damaging asphalt pavement.
Furthermore, pot holes often occur in rainy weather when visibility is poor, and in such a case, there is a risk of causing a vehicle accident if repair is not performed immediately. Depending on the cause of the damage or the degree of damage, the repair method is different, and the surface of the pavement is cut and a newly heated asphalt pavement is paved in the place where the damage is significant. On the other hand, when the degree of damage is small and urgent repair is required, the pothole repair mixture is spread over the area to be repaired and compacted, regardless of rainy weather.

  As a common pothole repair mixture, there is a cold asphalt paving material that can be handled at normal temperature. The cold asphalt paving material can be repaired for various pothole shapes, and since it is an asphalt mixture, it has high adhesion to the existing mixture. Usually, the cold asphalt pavement material is stored in a large size of about 20 kg per bag. Therefore, when repairing a portion to be repaired, it is necessary to take out the normal temperature asphalt paving material from the bag with a shovel or the like and compact it by rolling with a trowel, a shovel or the like. As described above, since the pothole often occurs in rainy weather when the visibility is poor, if the repair time is long, the risk of the worker fitting an accident increases. Then, the technique of the bag-packed normal temperature asphalt pavement material was developed (for example, refer patent document 1). This is because the cold asphalt paving material is restrained by the bag, so the cold hole asphalt paving material can be filled in the pot hole without scattering.

Patent No. 3733126

However, when using the repair material in which the normal temperature asphalt pavement material described in Patent Document 1 is packed, a bag (impurity) that has been filled with the normal temperature asphalt pavement material remains in the asphalt pavement after the repair. Since the adhesion to the cold asphalt paving material is reduced, a separate bag recovery step is required.
Therefore, according to the present invention, the normal temperature asphalt paving material packaged in a highly water-soluble package is installed at the repair target location, and the solvent contained in the normal temperature asphalt paving material is volatilized by the dissolution and disappearance of the packaging member. Provided is an asphalt pavement material package and asphalt pavement repair method in which impurities such as packaging members do not remain in asphalt pavement after repair by hardening the asphalt pavement material.

MEANS TO SOLVE THE PROBLEM As a result of repeating earnest research, the present inventors discover that the said subject is solvable by using the packaging member of a specific material, and came to complete this invention. That is, the present invention provides the following.
[1] An asphalt pavement material package comprising a packaging member made of polyvinyl alcohol resin having water solubility, and a normal temperature asphalt pavement included in the packaging member.
[2] The asphalt pavement material package according to [1], wherein the packaging member dissolves by 1 g or more in 100 g of water at 20 ° C.
[3] The asphalt pavement material package according to [1] or [2], wherein the packaging member completely dissolves by contact with water.
[4] The asphalt pavement material package according to any one of [1] to [3], wherein the packaging member completely dissolves within 24 hours when 10 g is dissolved in 100 g of water at 2 ° C.
[5] The asphalt pavement material package according to any one of [1] to [4], wherein the average thickness of the film thickness of the packaging member is 30 μm or more and 1200 μm or less.
[6] The asphalt pavement material package according to any one of [1] to [5], wherein a filler is covered on the outer periphery of the packaging member.
[7] The asphalt pavement material package according to any one of [1] to [6], wherein the filling ratio of the normal temperature asphalt pavement material to the packaging member is 40% or more and 97% or less.
[8] A step of installing the asphalt pavement material package according to any one of [1] to [7] at a repair target location present in asphalt pavement, and the packaging member of the asphalt pavement material package dissolving and disappearing The solvent contained in the normal temperature asphalt pavement material included by the packaging member volatilizes, and the process which the said normal temperature asphalt pavement material hardens | cures is included.

  According to the present invention, the normal temperature asphalt paving material packaged in a highly water-soluble package is installed at the repair target location, and the solvent contained in the normal temperature asphalt paving material is volatilized by the dissolution and loss of the packaging member. By curing the asphalt pavement material, it is possible to provide an asphalt pavement material package and an asphalt pavement repair method in which impurities such as a package do not remain in the asphalt pavement after repair.

Fig.1 (a) is a cross-sectional schematic diagram which shows the asphalt pavement material package which concerns on embodiment of this invention, FIG.1 (b) is the asphalt pavement material package seen from A of FIG. 1 (a). It is a cross-sectional schematic diagram which shows a body. It is a schematic diagram which shows the preparation methods of the asphalt pavement material package which concerns on embodiment of this invention. It is process sectional drawing which shows the asphalt pavement repair method which concerns on embodiment of this invention.

(Asphalt pavement material package)
As shown in FIG. 1, the asphalt pavement material package 1 according to the embodiment of the present invention includes a packaging member 10 made of polyvinyl alcohol resin having water solubility, and a normal temperature asphalt pavement material 20 contained in the packaging member 10. Equipped with
As shown in FIG. 2, the asphalt pavement material package 1 is manufactured by charging the normal temperature asphalt pavement material 20 from the opening 11 of the bag-like packaging member 10 and sealing the opening 11.

<Packaging member>
The polyvinyl alcohol resin used as the packaging member 10 preferably has a tensile strength of 20 to 40 MPa, more preferably 23 to 35 MPa, and 26 to 30 MPa under an environment of a temperature of 20 ° C. and a relative humidity of 65% RH. It is further preferred that The polyvinyl alcohol resin used as the packaging member 10 preferably has a tensile elongation of 90 to 240%, more preferably 120 to 225%, under an environment of a temperature of 20 ° C. and a relative humidity of 65% RH. More preferably, it is 150 to 190%. The polyvinyl alcohol resin used as the packaging member 10 can be sealed without being broken even when the cold asphalt pavement material 20 is packed by being in the above range.
The polyvinyl alcohol resin used as the packaging member 10 is preferably dissolved in 1 g or more of water at 20 ° C., more preferably 3 g or more, and still more preferably 5 g or more. When the polyvinyl alcohol resin used as the packaging member 10 satisfies the lower limit described above, the packaging member 10 completely dissolves and disappears due to moisture due to rain or the like after being used for repairing a pothole or the like. The dissolution and disappearance of the packaging member 10 after the use for the repair makes it possible to carry out the repair with the durability of the asphalt pavement maintained without the impurities remaining in the asphalt pavement.

  The water-soluble polyvinyl alcohol resin used as the packaging member 10 is preferably completely dissolved within 24 hours when 10 g of polyvinyl alcohol resin is poured into 100 g of water at 2 ° C., and completely dissolved within 12 hours. It is more preferable to dissolve, and it is further preferable to completely dissolve within 1 hour. When the polyvinyl alcohol resin used as the packaging member 10 satisfies the above upper limit value, the packaging member 10 dissolves and disappears quickly and completely even in a low temperature environment such as a winter highway. The dissolution and disappearance of the packaging member 10 after the use for the repair makes it possible to carry out the repair with the durability of the asphalt pavement maintained without the impurities remaining in the asphalt pavement.

  The polyvinyl alcohol resin is generally obtained by saponifying polyvinyl acetate which is a polymer of vinyl acetate. Polyvinyl acetate used as a raw material of polyvinyl alcohol may be a homopolymer of vinyl acetate, or may be mainly composed of vinyl acetate and a copolymer with a monomer copolymerizable therewith. The polyvinyl alcohol resin used in the present invention is preferably denatured, and more preferably polyvinyl alcohol denatured with an anionic group. The modification of polyvinyl alcohol is carried out by copolymerizing a monomer having a functional group with vinyl acetate and then saponifying it, or by saponifying polyvinyl acetate and applying a functional group other than hydroxyl group by grafting reaction, etc. ,It can be carried out.

  As a monomer used for the said copolymerization, olefins, unsaturated carboxylic acids, unsaturated sulfonic acids, vinyl ether, acrylamides which have an ammonium group etc. are mentioned, for example. Specifically as the copolymer, vinyl ester and a monomer copolymerizable therewith, such as olefins such as ethylene, propylene, isobutylene, α-octene, α-dodecene and α-octadecene; acrylic acid, methacrylic acid, Unsaturated acids such as crotonic acid, maleic acid, maleic anhydride, itaconic acid or their salts or mono- or dialkyl esters; nitriles such as acrylonitrile, methacrylonitrile; amides such as acrylamide, methacrylamide; ethylene sulfonic acid, Olefin sulfonic acids such as allyl sulfonic acid and methallyl sulfonic acid or salts thereof; alkyl vinyl ethers, N-acrylamidomethyl trimethyl ammonium chloride, allyl trimethyl ammonium chloride, dimethyldiallyl vinyl ketone, N- Nirupiroridon, vinyl chloride, saponified product of a copolymer of vinylidene chloride and the like.

  The polyvinyl alcohol resin used as the packaging member 10 preferably has a degree of saponification of 80 mol% or more, more preferably 83 mol% or more, and 85 mol% or more from the viewpoint of improving the solubility in water. Is more preferred. On the other hand, the degree of saponification is preferably 99 mol% or less, more preferably 95 mol% or less, and still more preferably 90 mol% or less.

  The polyvinyl alcohol resin may have a degree of polymerization of about 100 to 10,000. The degree of polymerization of the polyvinyl alcohol resin is preferably 3,000 or less, more preferably 2,500 or less, from the viewpoint of difficulty in dissolving in water if it exceeds 3,000. It is more preferable that it is 1,000 or less.

In order to seal the cold asphalt pavement material 20 which consists of crushed stone and asphalt, it is preferable that the packaging member 10 has durability to such an extent that it does not break. As the film thickness of the packaging member 10 is increased, the durability is improved.
From the above, the average thickness of the film thickness of the packaging member 10 is preferably 30 μm or more, and more preferably 40 μm or more. Here, the “average thickness” refers to the average value of the 10 measured points obtained by measuring the thickness at 10 different points of the packaging member 10. When the thickness of the packaging member 10 is equal to or more than the lower limit specified above, the durability capable of including the cold asphalt pavement material 20 is obtained.
However, if the film thickness of the packaging member 10 is too thick, it takes time until it is dissolved in water, and the packaging member 10 may remain in asphalt pavement without being completely melted. Therefore, the upper limit value of the average thickness of the film thickness of the packaging member 10 is preferably 1200 μm or less, more preferably 900 μm or less, and still more preferably 600 μm or less. When the thickness of the packaging member 10 is equal to or less than the above-described upper limit value, the packaging member 10 is dissolved by contact with water, and no residue remains in the asphalt pavement.

  It is assumed that the asphalt pavement material package 1 is stored in a warehouse or the like to such an extent that rain does not enter. Therefore, it is preferable that it can be stored stably regardless of the temperature and humidity throughout the year. In particular, although the packaging member 10 is water-soluble, it is preferable that the packaging member 10 be durable and capable of sealing the contents without dissolving even in a high humidity environment. Here, “under high humidity environment” means that relative humidity is 70% RH or more and 90% RH or less.

Asphalt pavement material package 1 is required that packaging member 10 is not torn by contact with moisture in the air and rainwater during storage or transport. For this reason, it is preferable that the outer periphery of the packaging member 10 be covered with stone powder obtained by crushing limestone and volcanic rock, and fillers such as slaked lime, cement, recovered dust, and fly ash. As a result, the asphalt pavement material package 1 can be prevented from adhering to each other. Furthermore, by covering the outer periphery of the packaging member 10 with a filler, when it comes into contact with water unexpectedly during transport, the dissolution of the packaging member 10 in water is delayed to make it difficult to break. it can. In the present specification, the term "filler" means "mineral material powder passing through a 75 μm sieve" as defined in "paving construction manual" (non-profit incorporated foundation, published by Japan Road Association, 2006 version). Say.
The amount of the filler that covers the outer periphery of the packaging member 10 is preferably 10% by mass or less, more preferably 8% by mass or less, and 5% by mass or less with respect to the total mass of the asphalt pavement packing 1. It is further preferred that

The filling ratio of the normal temperature asphalt pavement material 20 to the packaging member 10 is preferably 40% or more and 97% or less, more preferably 50% or more and 95% or less, and further preferably 60% or more and 90% or less preferable. As the filling rate of the normal temperature asphalt paving material 20 to the packaging member 10 is in the above range, the normal temperature asphalt paving material 20 is dispersed without forming a lump in the packaging member 10, so the asphalt pavement material package 1 is appropriate Since it has flexibility and follows various pothole shapes, it is possible to obtain adhesion with the existing road surface.
In addition, the filling rate here means the volume of the normal temperature asphalt pavement material 20 included in the packaging member 10 with respect to the volume of the packaging member 10.

The size of the packaging member 10 is not particularly limited, but in order to make the handling of the asphalt pavement material package 1 good, it is preferable that the size is such that it can contain an appropriate amount of the cold asphalt pavement material 20 . The size of the packaging member 10 is, for example, preferably such that the weight of the asphalt pavement material package 1 to be contained is 0.1 kg or more and 5.0 kg or less, and is 0.2 kg or more and 2.5 kg or less Is more preferable, and it is further preferable that the size is 0.3 kg to 1.0 kg.
The shape of the packaging member 10 is not particularly limited, and various shapes such as a rectangular parallelepiped, a cube, and an ellipsoid can be adopted.

<Normal temperature asphalt pavement>
The cold asphalt pavement material 20 is an aggregate obtained by mixing coarse aggregate (crushed stone) and fine aggregate (sand), or an aggregate made only of fine aggregate, asphalt, and a cutback oil. Cut-back oil is a highly volatile oil that allows asphalt to have fluidity even at normal temperature. Therefore, construction of asphalt pavement is possible at normal temperature. As asphalts used, those based on straight asphalt, which is petroleum asphalt for paving, or on such straight asphalts, styrene butadiene block copolymer (SBS), styrene isoprene block copolymer (SIS) ), And modified with addition of a thermoplastic elastomer such as ethylene / vinyl acetate copolymer (EVA). In addition, the asphalt binder may be a paving binder contained in existing asphalt pavement and regenerated asphalt regenerated from aggregate.

The cold asphalt pavement material 20 is preferably a mixture of compounding specifications such as a fine particle size asphalt mixture, a fine particle size asphalt mixture, a coarse density asphalt mixture and a porous asphalt mixture as an asphalt mixture. The fine-grained asphalt mixture is a mixture of compounding specifications in which the amount of aggregate passing through the 2.36 mm sieve is 50% or more and 65% or less. The fine particle size asphalt mixture is a mixture of formulation specifications in which the amount of aggregate passing through the 2.36 mm sieve is 35% or more and 50% or less. The coarse density asphalt mixture is a mixture of formulation specifications in which the amount of 2.36 mm sieve throughput of aggregate is 25% or more and 35% or less. The porous asphalt mixture is a mixture of formulation specifications in which the 2.36 mm sieve throughput of aggregate is 20% or less.
The maximum particle diameter of various mixtures used as the cold asphalt pavement material 20 is preferably 20 mm or less, preferably 13 mm or less, from the viewpoint of following the shapes of various pot holes and obtaining adhesion with the existing road surface. Is more preferably 5 mm or less.

It is preferable that the asphalt pavement material package 1 be used properly in terms of flexibility and durability depending on the conditions of use.
For example, when used for repairing a high speed area where the vehicle speed is high and urgency is high, it has flexibility to instantly follow pot holes of various shapes, and durability after bonding to an existing road surface It is preferable to use the asphalt pavement material package 1 having the above, that is, having both flexibility and durability. As described above, as the normal temperature asphalt pavement 20 used for repairing the asphalt pavement material 1 used for repairing a portion having high urgency, a load showing hardness after curing from the viewpoint of achieving both flexibility and durability ( The resistance value is preferably 30 to 55 pounds (LB) or less, more preferably 35 to 53 pounds (LB) or less, and more preferably 38 to 50 pounds (LB) More preferably, it is LB or less.
Also, for example, when used for the repair of a part where traffic volume and vehicle speed are relatively moderate and the urgency is low, the pothole can be filled firmly, there is no scattering of aggregates, and it can be assured that it is an existing road surface. It is preferable that the asphalt pavement material package 1 in which importance is attached to the durability to be adhered to is used. Thus, as the normal temperature asphalt paving material 20 employed for the asphalt paving material package 1 used for repairing a portion with low urgency, a load (resistance value) indicating hardness after curing from the viewpoint of putting importance on durability. Is preferably 56 pounds (LB) or more, more preferably 60 pounds (LB) or more, and still more preferably 65 pounds (LB) or more.
The hardness after curing of the cold asphalt pavement material 20 can be controlled by adjusting the temperature at which the asphalt mixture is produced, adjusting the amount of addition of a binder or the like, and the like.
In addition, the load (resistance value) is the proctor described in "Design and construction of various sports facilities for construction guidelines for outdoor gymnasiums" (issued by the Association of Gymnasiums for Physical Education and Outdoor Gymnasium of Japan, Revised 2017). It is obtained by measuring based on a needle test (penetration resistance test).

The asphalt mixture according to the present embodiment may contain a resin and a rubber component, other additives, and the like which are included in a common asphalt mixture.
Asphalt gradually hardens due to the evaporation of cutback oil as an additive. Therefore, when the cold asphalt pavement material 20 is stored before use, it is preferable to seal the cut back oil so as not to evaporate.

(Asphalt pavement repair method)
In the asphalt pavement repairing method according to the embodiment of the present invention, a step of installing the above-described asphalt pavement material package 1 at a repair target location existing in asphalt pavement, and the packaging member 10 of the asphalt pavement material package 1 is dissolved Disappearing causes the solvent contained in the normal temperature asphalt paving material 20 contained in the packaging member 10 to be volatilized, and the normal temperature asphalt paving material 20 is hardened.
Below, the asphalt pavement repair method is demonstrated, referring FIG.

As shown to Fig.3 (a), the road in which the asphalt mixture 31 was constructed may produce repair object location 40, such as a pothole, on the pavement surface.
When the repair target portion 40 is generated on the pavement surface, first, the asphalt pavement material package 1 is installed at the repair target portion 40 present in the asphalt mixture 31, as shown in FIG. 3 (b). As asphalt pavement material package 1 is subdivided, it can respond to various shapes of repair object point 40.
And as shown in FIG.3 (c), the packaging member 10 of the asphalt pavement material package 1 installed in the repair object location 40 melt | dissolves and lose | disappears by rain water etc. As shown in FIG. By the dissolution and disappearance of the packaging member 10, the cut back oil contained in the normal temperature asphalt pavement 20 contained in the asphalt pavement material package 1 is volatilized, and the hardening of the normal temperature asphalt pavement 20 is promoted.

According to the asphalt pavement material package and the asphalt pavement repairing method according to the embodiment of the present invention, it is not necessary to open from the bag, spread and level the pressure as in the conventional cold asphalt pavement material. The asphalt pavement material package can be repaired without using a special tool or the like simply by installing it at the repair target location. Therefore, it can be used for the repair of the repair target part which has urgency.
Furthermore, since the packaging member of the asphalt pavement material package completely dissolves and disappears due to moisture such as rain, no impurities remain in the asphalt pavement. Therefore, it is possible to carry out repair that maintains the durability of asphalt pavement, and it is possible to save time and effort to remove impurities remaining in asphalt pavement after repair.

  Hereinafter, the present invention will be described by way of examples. The present invention is not limited to these examples.

[Evaluation method]
Each evaluation was performed by the following method in each Example and a comparative example. In the water solubility evaluation, the dissolution rate evaluation and the evaluation of the state after contact with water, the package member was cut out into 5 cm long x 5 cm wide as a sample.

<Water solubility evaluation>
It is preferable that the packaging member 10 melt | dissolves by contacting with water, such as rain water, in a repair location, and the enclosed normal temperature asphalt pavement material 20 is exposed. Therefore, the sample was put into a beaker containing 100 ml of water at 20 ° C., and the amount of the sample dissolved in 100 ml of water was evaluated based on the following criteria. The evaluation results are shown in Table 1.
○: 1 g or more ×: less than 1 g

<Dissolution rate evaluation>
It is preferable that the packaging member 10 dissolves and disappears quickly and completely by contact with water such as rain water. Furthermore, since the temperature of the freeway in winter drops significantly at night, it is assumed that rainwater and water are extremely cold. Therefore, 10 g of a sample was put into a beaker containing 100 ml of water at 2 ° C., and the state of the sample after stirring with a magnet stirrer was evaluated based on the following criteria. The evaluation results are shown in Table 1.
○: completely dissolved by stirring within 1 hour Δ: dissolved but required 1 to 24 hours of stirring ×: not dissolved even after stirring for 24 hours or more

<Evaluation of the state after contact with water>
The state of the sample subjected to water solubility evaluation after contact with water was visually confirmed. The evaluation results are shown in Table 1.

Example 1
The packaging member was produced with polyvinyl alcohol resin "Hiselon C type | mold-200 (brand name)" (made by Nippon Synthetic Chemical Industry Co., Ltd.). The package member was cut out to have a length of 5 cm × width 5 cm × film thickness 30 μm as a sample in Example 1. The above evaluation was performed on the sample. The evaluation results are shown in Table 1.

Example 2
The packaging member was produced with polyvinyl alcohol resin "Hiselon C type | mold-200 (brand name)" (made by Nippon Synthetic Chemical Industry Co., Ltd.). What cut out the said packaging member by length 5 cm x width 5 cm x film thickness 40 micrometers was made into the sample in Example 2. FIG. The above evaluation was performed on the sample. The evaluation results are shown in Table 1.

[Example 3]
The packaging member was produced with polyvinyl alcohol resin "Hiselon C type | mold-200 (brand name)" (made by Nippon Synthetic Chemical Industry Co., Ltd.). What cut out the said packaging member by length 5 cm x width 5 cm x film thickness 600 micrometers was made into the sample in Example 3. FIG. The above evaluation was performed on the sample. The evaluation results are shown in Table 1.

Example 4
The packaging member was produced with polyvinyl alcohol resin "Hiselon C type | mold-200 (brand name)" (made by Nippon Synthetic Chemical Industry Co., Ltd.). What cut out the said packaging member by length 5 cm x width 5 cm x film thickness 900 micrometers was made into the sample in Example 4. FIG. The above evaluation was performed on the sample. The evaluation results are shown in Table 1.

[Example 5]
The packaging member was produced with polyvinyl alcohol resin "Hiselon C type | mold-200 (brand name)" (made by Nippon Synthetic Chemical Industry Co., Ltd.). What cut out the said packaging member by length 5 cm x width 5 cm x film thickness 1200 micrometers was made into the sample in Example 5. FIG. The above evaluation was performed on the sample. The evaluation results are shown in Table 1.

Comparative Example 1
The packaging member was manufactured by Oburato "Kokko Oburato" (made by Kunimitsu Oburato Co., Ltd.). What cut out the said packaging member by length 5 cm x width 5 cm x film thickness 40 micrometers was made into the sample in the comparative example 1. FIG. The above evaluation was performed on the sample. The evaluation results are shown in Table 1.

Comparative Example 2
The packaging member was produced with polyethylene "Klerap" (made by Kureha Co., Ltd.). What cut out the said packaging member by length 5 cm x width 5 cm x film thickness 40 micrometers was made into the sample in the comparative example 2. FIG. The above evaluation was performed on the sample. The evaluation results are shown in Table 1.

Comparative Example 3
A paper bag (commercially available paper bag) was used as a packaging member. What cut out the said packaging member by length 5 cm x width 5 cm x film thickness 50 micrometers was made into the sample in the comparative example 3. FIG. The above evaluation was performed on the sample. The evaluation results are shown in Table 1.

Comparative Example 4
A non-woven bag was used as the packaging member. What cut out the said packaging member by length 5 cm x width 5 cm x film thickness 50 micrometers was made into the sample in the comparative example 4. FIG. The above evaluation was performed on the sample. The evaluation results are shown in Table 1.

[Evaluation method]
Each evaluation was performed by the following method in each Example and a comparative example.

<Humidity stability evaluation>
Since the packaging member 10 seals and transports the cold asphalt pavement material composed of aggregate and asphalt, it is preferable that the packaging member 10 has durability to such an extent that the cold asphalt pavement material 20 is not damaged even when filled. Furthermore, it is assumed that the packaging member 10 is stored in a warehouse or the like that does not allow rain to enter. Therefore, it is preferable that it can be stored stably regardless of the temperature and humidity throughout the year. The packaging member 10 was formed into a bag shape of 25 cm × 20 cm, and 2 kg of the normal temperature asphalt paving material 20 was filled to prepare an asphalt paving material package 1. After exposing to the conditions of temperature 60 ° C. and relative humidity 90% RH and curing for 24 hours, the breakage condition of the packaging member 10 was observed every 10 times. The evaluation results are shown in Table 2.
:: no damage was observed even after 100 times of △: 1: breakage was observed between 10 and 100 times 破損: breakage was observed in less than 10 times

<Evaluation of moisture resistance by filler>
The packaging member 10 was formed into a bag shape of 25 cm × 20 cm, and 2 kg of “Cold Permix” (manufactured by Toa Road Industry Co., Ltd.) was filled as the normal temperature asphalt paving material 20 to prepare 10 asphalt paving material packages 1 each. Do not dust stone powder as filler on the outer periphery of the packaging member 10 (0%), dust 5% or 15% with respect to the mass of the asphalt pavement material package 1, make it 10 steps flat, temperature 60 ° C, relative humidity It was stored for 24 hours under the condition of 90% RH. After that, the packaging member was dissolved by humidity, and it was confirmed whether or not the packaging members were adhered to each other. Furthermore, the operator was worn with a wet glove, the asphalt pavement material package 1 was lifted one by one with one hand, and was reloaded at a distance of 10 m to observe the transport workability. Table 2 shows the evaluation results of the adhesion resistance and the transportability of the asphalt pavement material package 1 with each other.
Bonding resistance
○: The asphalt pavement material package 1 was lifted one by one when lifted Δ: There was stickiness when lifting the asphalt pavement material package 1 ×: When the asphalt pavement material package 1 was lifted Was pulled by the asphalt packaging material packaging material 1 and the packaging member 10 was torn, or the packaging member 10 was melted and torn.
○: The wet army could be worn and reloaded at a distance of 10 m with one hand △: The wet army could be worn and reloaded at a distance of 10 m with one hand, Handprints remained on the surface of the asphalt pavement material package 1: Poor: Wearing a wet military hand in water, the packaging member 10 was melted and torn during lifting or conveyance with one hand

[Example 6]
As a packaging member 10, a 30 μm-thick polyvinyl alcohol resin “Hiselon C type -200 (trade name)” (manufactured by Japan Synthetic Chemical Industry Co., Ltd.) was used, and an asphalt pavement material package 1 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 2.

[Example 7]
As a packaging member 10, a 40 μm thick polyvinyl alcohol resin “Hiselon C type -200 (trade name)” (manufactured by Japan Synthetic Chemical Industry Co., Ltd.) was used, and an asphalt pavement material package 1 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 2.

[Example 8]
As a packaging member 10, a polyvinyl alcohol resin "Hiselon C type -200 (trade name)" (manufactured by Japan Synthetic Chemical Industry Co., Ltd.) (made by Nippon Synthetic Chemical Industry Co., Ltd.) having a thickness of 600 μm was adopted, and an asphalt pavement material package 1 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 2.

[Example 9]
As a packaging member 10, a polyvinyl alcohol resin "Hiselon C type -200 (trade name)" (manufactured by Japan Synthetic Chemical Industry Co., Ltd.) (a film manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) having a film thickness of 900 μm was adopted, and an asphalt pavement material package 1 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 2.

[Example 10]
As a packaging member 10, a polyvinyl alcohol resin "Hiselon C type -200 (trade name)" (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) (a film manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) having a thickness of 1200 μm was adopted, and an asphalt pavement material package 1 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 2.

Comparative Example 5
As a packaging member 10, a 40 μm thick oblate “Kokko oblate” (manufactured by Kunimitsu Obato Co., Ltd.) was adopted, and an asphalt pavement material package 1 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 2.

Comparative Example 6
As a packaging member 10, a polyethylene “Klerap” (made by Kleha Co., Ltd.) (film thickness 40 μm) was adopted, and an asphalt pavement material package 1 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 2.

Comparative Example 7
A paper bag (commercially available paper bag) with a film thickness of 50 μm was adopted as the packaging member 10, and the asphalt pavement material package 1 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 2.

Comparative Example 8
A non-woven bag having a thickness of 50 μm was adopted as the packaging member 10, and an asphalt pavement material package 1 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 2.

<Evaluation of asphalt pavement material package>
As a normal temperature asphalt pavement material, 2 kg of "Cold Permix" (manufactured by Toa Road Industrial Co., Ltd.) was put into the packaging members of Examples 6 to 10 and Comparative Examples 5 to 8 to prepare asphalt pavement material package 1. .
The produced asphalt pavement material package was stored for 24 hours in an environment of temperature 60 ° C. and humidity 90% RH, and then installed at a repair target location (maximum diameter 10 cm, maximum depth 5 cm) present in asphalt pavement. After that, 1 L of water was sprinkled and the repaired asphalt pavement was evaluated.
The packaging member of Comparative Example 5 was hardened by being stored in a high humidity environment, and was broken in contact with the aggregate. Moreover, since the film thickness was thin also about the packaging member of Example 6, it contacted with aggregate and it damaged. When the packaging member is broken before the pothole is installed, the aggregate of the internal temperature asphalt pavement material is scattered, and the repair target portion is not repaired flatly. The packaging members of Examples 7 to 10 are made of aggregate. No damage is observed, and there is no residual impurity remaining at the repair site using the asphalt pavement material package, and no aggregate scattering is seen because the aggregate is restrained by the packaging member, and the repair target site is asphalt The pavement material was cured and repaired flat.
Although the packaging members of Example 9 and Example 10 are water-soluble by watering, they did not completely dissolve and remained as impurities. This asphalt pavement material package was peeled off due to poor adhesion with asphalt pavement.
Although the repair location using the asphalt pavement material package of Comparative Examples 6 to 8 was flat, the packaging member remains in the repair location without exposing the enclosed normal temperature asphalt pavement repair material, and the asphalt pavement Peeled off due to poor adhesion.

  From Table 2, regarding the humidity stability evaluation, when the comparative example 5 is exposed to high humidity, the packaging member 10 is cured, and the packaging member 10 is torn by being swallowed. In Examples 6 to 10, the packaging member 10 was not cured even when exposed to high humidity, but Example 6 was broken by being scalded, and Examples 7 to 10 were not broken even if scolded . On the other hand, Comparative Examples 6 to 8 were not water-soluble, and therefore were not affected by high humidity, and the packaging member was not broken even if swallowed.

From Table 2, with regard to adhesion resistance, even if the comparative example 5 was sprinkled with the filler, the packaging member 10 was dissolved with a small amount of water. Since the packaging members 10 of Comparative Examples 6 to 8 are not water-soluble, no adhesion between the asphalt pavement material packages was observed even if they were lifted with a wet glove.
In Examples 6 and 7, if the filler was not covered, the packaging member 10 was dissolved and broken by the wet trooper, but it could be lifted one by one by covering the filler. In the eighth embodiment, if the filler is not sprinkled, water infiltrates between the layers of the asphalt pavement packing 1 stacked by the wet army, and the asphalt pavement packing 1 interface adheres to lift the upper part. At the same time, the upper packaging member 10 was torn by the weight of the lower part, but it could be lifted one by one by spreading the filler. In Examples 9 and 10, if the filler is not covered, water intrudes between the layers of the asphalt pavement material package 1 stacked by the wet soldier, but the film thickness is thick, but it is sticky, It was possible to lift it one by one, and it was possible to lift it one by one with no stickiness when sprinkled with fillers.

From Table 2, with regard to the conveyance workability, in Comparative Example 5, the packaging member 10 was dissolved with a small amount of water even when the filler was sprinkled. Since the packaging members 10 of Comparative Examples 6 to 8 are not water soluble, they were able to be transported to a predetermined location even if they were lifted by a wet glove. However, by spreading the filler on the surface of the packaging member 10 of Comparative Examples 6-8, it became slippery, and it slipped and was dropped during transportation by a military hand.
In Examples 6 and 7, if the filler was not covered, the packaging member 10 was dissolved and broken when lifted up with a wet glove. By spreading the filler on the surface of the packaging member 10 of Examples 6 and 7, it could be transported to a predetermined place. In the eighth embodiment, if the filler is not covered, water intrudes between the layers of the asphalt pavement packing 1 stacked up when picked up with a wet trowel, and the asphalt pavement packing 1 interface adheres. The upper packaging member 10 is torn by the weight of the lower portion when the upper portion is lifted. By covering the surface of the packaging member 10 of Example 8 with a filler, it could be transported to a predetermined place. In Example 9, if the filler was not covered, the packaging member 10 was gradually dissolved and lifted by a wet trowel, but the packaging member 10 was torn during transportation. By covering the surface of the packaging member 10 of Example 9 with a filler, it could be transported to a predetermined place. In Example 10, although the filler could not be covered, it could be transported to a predetermined place, but the surface of the packaging member 10 was partially dissolved by a wet glove and the bill was attached. However, by spreading the filler on the surface of the packaging member 10 of Example 10, it could be transported to a predetermined place without a bill.

[Evaluation method]
In each example, each evaluation was performed by the following method.

<Evaluation of hardness after hardening of normal temperature asphalt pavement>
In order to evaluate the hardness after hardening of the normal temperature asphalt pavement material 20, "Design and construction of various sports facilities for construction guidelines of outdoor physical fitness facilities" (non-profit incorporated association, Japan Physical Fitness Facilities Association, published by Outdoor Physical Fitness Facilities Committee, 2017 The proctor needle test (penetration resistance test) described in the revised edition was conducted.
As a test procedure, first, 500 g of a cold asphalt pavement material was placed in a mold having a diameter of 101.16 mm and a height of 88.9 mm, and both sides were pressed 25 times each. Then, the cold asphalt pavement material was immediately removed from the mold. Then, without curing, push a metal rod (Proctor needle) with a constant diameter of 6.5 mm at a speed of 1/2 inch to 1 inch, and visually check whether the cold asphalt pavement material breaks down. , It was classified as follows. The evaluation results are shown in Table 3.
Evaluation of durability and flexibility
A: It did not collapse (the durability is high)
B: Partially broken (Both durability and flexibility)
C: All collapsed (high flexibility)
"Resistance value"
The load (resistance value) of the cold asphalt pavement material in each example was measured. The load is indicated in pounds (LB). The evaluation results are shown in Table 3.

[Example 11]
A 40-μm thick polyvinyl alcohol resin "Hiselon C type-200 type (trade name)" (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) is used as the packaging member 10, and a cold permix as the normal temperature asphalt pavement material 20 (Toa Road Asphalt pavement material package 1 of Example 11 was produced by adopting Industrial Co., Ltd.). The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 3.

[Example 12]
Example 11 was carried out in the same manner as Example 11 except that the binder used for cold permix was increased to "Cold Permix" (manufactured by Toa Road Industrial Co., Ltd.) as the cold asphalt pavement material 20 and the viscosity was adjusted. Asphalt pavement material package 1 of Example 12 was produced. The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 3.

[Example 13]
An asphalt pavement material package 1 of Example 12 was produced in the same manner as in Example 11 except that the normal temperature asphalt pavement material 20 was changed to "Highmente" (manufactured by Toa Road Industry Co., Ltd.). The above-mentioned evaluation was performed to the asphalt pavement material package 1 concerned. The evaluation results are shown in Table 3.

From Table 3, Example 11 did not collapse at all even if the proctor needle was pushed in, and maintained the original shape, so the durability was high. Further, in Example 13, when the proctor needle is pushed in, it collapses instantaneously, flexibility is very high, and there is a concern about aggregate scattering. And although Example 12 collapses when a proctor needle is pushed in, compared with Example 13, it took time to collapse and there was no scattering. That is, Example 12 had both durability and flexibility.
In the case of using in a place having high urgency, a cold asphalt pavement material that instantly follows the shape of the pothole is required, so it is considered desirable to have a combination of durability and flexibility as in Example 12. In addition, in the case of using in a place where the urgency is low, it is considered that a durable, normal temperature asphalt paving material is required, so a material that is less likely to collapse as in Example 11 is desirable.

[Evaluation method]
Each evaluation was performed by the following method in each Example and a comparative example.

<Evaluation of dispersibility of normal temperature asphalt paving material 20 to asphalt paving material package 1>
The cold asphalt pavement material 20 enclosed in the packaging member 10 is preferably in a dispersed state without forming a lump. Therefore, a test was conducted to evaluate the dispersion state of the normal temperature asphalt paving material 20 filled in the asphalt paving material package 1.
As a test procedure, first, the cold asphalt pavement material 20 was put in a 13 cm × 20 cm bag-like packaging member 10 and sealed. And the filling rate of the normal temperature asphalt pavement material 20 currently filled with the packaging member 10 was computed. Next, after the asphalt paving material package 1 was entirely unrolled 10 times, it was evaluated whether there was a lump of the cold asphalt paving material 20 or whether it was uniformly dispersed in the packaging member 10 according to the following criteria: . The evaluation results are shown in Table 4.
○: There are no lumps of cold asphalt pavement and uniformly dispersed in the packaging member. Δ: There are no lumps of cold asphalt pavement but there is a bias in the packaging members. ×: Hard lumps of cold asphalt pavement. It has occurred

Example 14
As the packaging member 10, a 13 cm × 20 cm bag-like polyvinyl alcohol resin “Hytheron C type −200 type (trade name)” (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was prepared. Moreover, the binder used for cold permix was made to "cold per mix" (made by Toa Road Industrial Co., Ltd.) as the normal temperature asphalt pavement material 20, and what adjusted viscosity was prepared.
Next, 100 g of the cold asphalt pavement material 20 was put in the packaging member 10 and sealed, and an asphalt pavement material package 1 of Example 14 was produced. In the asphalt pavement material package 1 of Example 14, the filling rate of the cold asphalt pavement material 20 with respect to the packaging member 10 was 30%.
The above-mentioned evaluation was performed with respect to the produced asphalt pavement packing 1. The evaluation results are shown in Table 4.

[Example 15]
An asphalt pavement material package 1 of Example 15 was produced in the same manner as in Example 14 except that the normal temperature asphalt pavement material 20 put in the packaging member 10 was changed to 300 g. In the asphalt pavement material package 1 of Example 15, the filling rate of the cold asphalt pavement material 20 with respect to the packaging member 10 was 50%.
The above-mentioned evaluation was performed with respect to the produced asphalt pavement packing 1. The evaluation results are shown in Table 4.

[Example 16]
An asphalt pavement material package 1 of Example 16 was produced in the same manner as in Example 14 except that the normal temperature asphalt pavement material 20 put in the packaging member 10 was changed to 500 g. In the asphalt pavement material package 1 of Example 16, the filling rate of the cold asphalt pavement material 20 with respect to the packaging member 10 was 80%.
The above-mentioned evaluation was performed with respect to the produced asphalt pavement packing 1. The evaluation results are shown in Table 4.

[Example 17]
An asphalt pavement material package 1 of Example 17 was produced in the same manner as in Example 14 except that the normal temperature asphalt pavement material 20 put in the packaging member 10 was changed to 600 g. In the asphalt pavement material package 1 of Example 17, the filling rate of the cold asphalt pavement material 20 with respect to the packaging member 10 was 90%.
The above-mentioned evaluation was performed with respect to the produced asphalt pavement packing 1. The evaluation results are shown in Table 4.

[Reference Example 1]
An asphalt pavement material package 1 of Comparative Example 7 was produced in the same manner as in Example 14 except that the normal temperature asphalt pavement material 20 put in the packaging member 10 was changed to 700 g. In the asphalt pavement material package 1 of Comparative Example 7, the filling rate of the cold asphalt pavement material 20 to the packaging member 10 was 100%.
The above-mentioned evaluation was performed with respect to the produced asphalt pavement packing 1. The evaluation results are shown in Table 4.

From Table 4, although the asphalt pavement material package 1 of Example 14 does not have a lump, some bias has arisen in the packaging member 10. As shown in FIG. The asphalt pavement material package 1 of Examples 15 to 17 was good with no lumps and no deviation in the packaging member 10. When using for repairing the pothole, the asphalt pavement material package 1 of Examples 9 to 12 was able to follow the shape of the pothole and to obtain adhesiveness with the existing road surface.
On the other hand, in the asphalt pavement material package 1 of Reference Example 1, since the filling rate was too high, the normal temperature asphalt pavement material 20 was consolidated in the packaging member 10, and large hard lumps were generated. When the asphalt pavement material package 1 of Comparative Example 7 was used to repair the pothole, the lump did not follow the shape of the pothole, the flatness could not be secured, and unevenness was generated on the repaired road surface. When the unevenness is generated, the repair road surface may be damaged due to winding up of a tire of the traveling vehicle.

1: Asphalt pavement material package 10: Packaging member 11: Opening 20: normal temperature asphalt pavement 30: asphalt mixture or road surface 31: asphalt mixture 40: repair target location

Claims (8)

A packaging member made of polyvinyl alcohol resin having water solubility;
An asphalt pavement material package comprising a cold asphalt pavement material included in the packaging member.   The asphalt pavement material package according to claim 1, wherein the packaging member dissolves 1 g or more in 100 g of water at 20 ° C.   The asphalt pavement material package according to claim 1 or 2, wherein the packaging member completely dissolves by contact with water.   The asphalt pavement material package according to any one of claims 1 to 3, wherein the packaging member completely dissolves within 24 hours when 10 g is dissolved in 100 g of water at 2 ° C.   The asphalt paving material package according to any one of claims 1 to 4, wherein the average thickness of the film thickness of the packaging member is 30 μm or more and 1200 μm or less.   The asphalt pavement material package according to any one of claims 1 to 5, wherein a filler is covered on the outer periphery of the packaging member.   The asphalt paving material package according to any one of claims 1 to 6, wherein a filling ratio of the normal temperature asphalt paving material to the packaging member is 40% or more and 97% or less.   The process of installing the asphalt pavement material package body in any one of Claims 1-7 in the repair object location which exists in asphalt pavement, and the packaging member of the said asphalt pavement material package body melt | dissolving disappears, The solvent contained in the cold asphalt pavement material contained in the packaging member is volatilized, and the cold asphalt pavement material is hardened.