JPH1181211A - Ordinary temperature mixture for low-noise elastic body antifreezing pavement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mix a sufficient quantity of rubber pieces while maintaining fluidity resistance and peeling resistance by containing an aggregate, an asphalt emulsion, a hydraulic inorganic material, and rubber pieces. SOLUTION: An ordinary temperature mixture containing an aggregate, an asphalt emulsion, a hydraulic inorganic material, and rubber pieces and concurrently having a lownoise function and an antifreezing function is manufactured. A low-noise elastic body antifreezing pavement body is constructed with this ordinary temperature mixture. The blending ratio of the aggregate and rubber pieces is set to aggregate:rubber piece = 20-90:80-10 wt.%. The quantity of the hydraulic inorganic material is set to 15-60 pts.wt. to the asphalt emulsion 100 pts.wt. The blending ratio of asphalt and a modifier in the asphalt emulsion is set to the range of the modifier 25-100 pts.wt. against the asphalt 100 pts.wt. The blended quantity of a tackifier is set to 0.1-50 pts.wt. to the asphalt 100 pts.wt. in the asphalt emulsion to improve the adhesiveness to the rubber pieces, thereby execution is made safely and economically, and an excellent antifreezing effect can be exerted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a room temperature mixture for an elastic freezing-preventing pavement, and more particularly, to a low-noise function and an antifreezing function including an aggregate, an asphalt emulsion, a hydraulic inorganic material and rubber pieces. It relates to a so-called low-noise-type elastic freezing suppressing pavement ordinary-temperature mixture for pavement, and a low-noise-type elastic freezing suppressing pavement having both a low-noise function and a freezing-suppressing function constructed using the ordinary-temperature mixture. is there.

[0002]

2. Description of the Related Art In recent years, the demands on the traffic environment have become more and more severe. In particular, as one of the safety measures in winter due to the ban on spiked tires, rubber pieces are mixed into pavement to make use of this elasticity. Attention has been paid to a freeze-suppressing pavement of the type in which ice on a road surface is separated and removed by using the same (hereinafter referred to as “elastic body freeze-suppressing pavement”), and various attempts have been made.

[0003] The elastic freezing suppression pavement includes a hot rolled type in which a rubber piece is sprayed immediately after paving of a heated asphalt mixture and pressed with a roller, a mastic type in which a mastic in which a single-grain rubber piece is mixed with a filler and asphalt is poured, There is an aggregate replacement type that replaces part of the aggregate in the mixture with rubber pieces.Each type requires less initial investment and requires no operating costs compared to the heat melting method such as road heating and groundwater spraying. Certain points are also superior to the method utilizing the freezing point drop due to chloride elution, in that there is no adverse effect due to salt elution and the freeze-inhibiting effect is sustained. Another feature is that the friction noise generated between the vehicle and the vehicle tires is reduced, and a noise suppressing effect is obtained.

However, in such an elastic body freezing-preventing pavement, when the weight of the vehicle is loaded, a large distortion is generated in the pavement due to the deformation of the rubber piece, and this distortion causes an adhesive property between the rubber piece and asphalt as a binder. If is not sufficient, there is a problem that peeling occurs at the interface between the two, and the fluid resistance and peeling resistance of the pavement are easily impaired.

[0005] In view of such a problem, conventionally, in order to maintain the flow resistance and the peel resistance depending on the adhesive force between the aggregate and the asphalt, the compounding ratio of the rubber pieces in the mixture is conventionally determined. The heating method is adopted to keep the asphalt and the aggregate strength from the aspect of construction while keeping it low.

That is, in the prior art, if the flow resistance and the peeling resistance are to be ensured in the elastic body freeze suppression pavement, the amount of rubber pieces in the asphalt mixture is about 5% by weight in the aggregate replacement type. At present, it can be mixed only up to less than 10% by weight, so that not only the sufficient deicing performance cannot be obtained, but also the noise suppression effect, which is a feature of the elastic body freeze suppression pavement, is not sufficiently obtained at present. In addition, since the aggregate replacement type uses a heated asphalt mixture for construction, it is not sufficiently satisfactory in terms of energy consumption and safety.

On the other hand, in the mastic type, it is possible to mix 20 to 30% by volume of rubber pieces in the asphalt mixture.
It is an ultra-thin layer of 6 mm, and has a problem in durability.

[0008] As described above, the conventional elastic body freezing-preventing pavement is not always satisfactory, and by increasing the amount of rubber pieces while maintaining fluid resistance and peeling resistance, it is possible to improve the ice delamination performance and noise reduction performance. There is a strong demand for a low-noise elastic freezing-preventive pavement mixture that is excellent and has a sufficient noise-suppressing effect and can be applied at room temperature.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and a sufficient amount of rubber pieces while maintaining fluid resistance and peeling resistance. A mixture of low-noise elastic body freezing suppression pavement having both low noise function and freezing suppression function that can be mixed at room temperature and can be installed at normal temperature, and such low-noise elastic body freezing It is an object of the present invention to provide a low-noise elastic freezing-preventing pavement having both a low-noise function and a freezing-suppressing function, which is constructed of a normal-temperature mixture for suppressing pavement.

[0010]

Means for Solving the Problems The present inventors fundamentally changed the conventional idea of maintaining the flow resistance and the peel resistance depending on the adhesive force between the aggregate and the asphalt, and rather changed the amount of the adhesive. As a result of repeated research from the viewpoint of improving the flow resistance and peeling resistance of pavement by actively utilizing the adhesive force between the rubber pieces to be mixed and asphalt used as a binder, surprisingly, Also, by using asphalt emulsion that can be applied at normal temperature in place of conventional hot asphalt and by using hydraulic inorganic materials such as cement together, the conventional elasticity can be maintained while maintaining sufficient fluid resistance and peeling resistance. The present invention has been completed by finding that a larger amount of rubber pieces can be mixed than the body freeze suppressing pavement.

That is, the present invention provides a room-temperature mixture for a low-noise elastic body anti-freezing pavement, which comprises an aggregate, an asphalt emulsion, a hydraulic inorganic material and a rubber piece, and has both a low-noise function and a freezing-inhibiting function. In addition, by providing a low-noise elastic freezing suppression pavement having both a low-noise function and a freezing suppression function, which is constructed of such a low-noise elastic freezing suppression pavement room-temperature mixture, the above-described problem is solved. Is the solution.

In the room temperature mixture for low noise type elastic freezing suppression pavement of the present invention, the asphalt emulsion to be used is modified with an appropriate modifier, or a tackifier such as a petroleum resin is added to the asphalt emulsion. By further treating the rubber pieces to be used with an organic solvent in advance, it is possible to further increase the adhesive force between the rubber pieces and a binder such as asphalt, and when a large amount of rubber pieces are mixed. However, since it can maintain good fluidity resistance and peeling resistance, it not only exhibits excellent icing peeling performance in winter, but also exhibits excellent low noise performance even outside of winter Is what you can do.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the low-temperature, room-temperature mixture for freeze suppressing pavement of the present invention will be described in detail.

The asphalt emulsion used in the room-temperature mixture for low-noise type elastic freezing suppression pavement of the present invention includes natural asphalt such as lake asphalt, straight asphalt, blown asphalt, semi-blown asphalt, solvent deasphalted asphalt (for example, propane One kind of petroleum asphalt such as deasphalted asphalt), heavy oil, tar, pitch or the like, or a bituminous substance obtained by mixing two or more kinds thereof, is mixed with various surfactants and emulsifiers such as clay (for example, bentonite). , Acids, salts, dispersants, protective colloids, etc., as required, and a colloid mill,
It is emulsified in water by a suitable emulsifier such as a homogenizer and a homomixer.

As the emulsifier, any of a cationic, anionic and amphoteric type can be used. As the cationic emulsifier which can be used in the present invention, an aliphatic or alicyclic monoamine having a long-chain alkyl group is used. , Diamine, triamine, amidoamine, polyaminoethylimidazoline, long-chain hydroxyalkyldiamine, rosinamine, ethylene oxide adducts of these amines, amine oxide, or acids such as hydrochloric acid, sulfamic acid, acetic acid, etc. And water-soluble or water-dispersible salts, and quaternary ammonium salts of these amine surfactants. Also,
Nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl allyl ethers, and oxyethylene / oxypropylene block copolymers can be used in combination with these surfactants.

The anionic emulsifiers usable in the present invention include higher alcohol sulfates, alkyl allyl sulfonates, alkyl benzene sulfonates, α-olefin sulfonates, higher alcohol ethoxylates, higher alcohol ethoxylate sulfates, and the like. Soap, naphthalene sulfonate and modified formalin,
Examples thereof include alkali lignin salts, lignin sulfonates, alkali salts of casein, and polyacrylates.

Examples of the amphoteric emulsifier which can be used in the present invention include alkylphenols, mono- and polyhydric alcohol acids, adducts of alkylene oxides such as aliphatics, aliphatic amines, aliphatic amides and ethanolamines. Is mentioned.

The dispersant and protective colloid used in the asphalt emulsion used in the present invention include sodium naphthalenesulfonate, casein, alginic acid, gelatin, carboxymethylcellulose, ethylcellulose, and the like.
Hydroxyethyl cellulose, polyvinyl alcohol,
Examples include sodium polyacrylate, lignin sulfonate, nitrohumate and the like.

To these asphalt emulsions, ultraviolet absorbers, various additives, viscosity modifiers, etc. are added for the purpose of improving heat resistance, preventing deterioration due to ultraviolet rays, improving workability, and improving adhesiveness. You may.

The solid content in the asphalt emulsion used in the present invention is preferably in the range of 50 to 85% by weight. If the solid content is less than 50% by weight, the asphalt emulsion must be used in a large amount in order to exhibit the performance of the mixture, so that the asphalt emulsion may flow undegraded to the construction site when paving the mixture. Not only is workability worsened, but also the curing time is prolonged and stability cannot be expected, which is not preferable. On the other hand, if the solid content exceeds 85% by weight, the decomposition and curing speed of the asphalt emulsion becomes unnecessarily high, and the workability deteriorates. The asphalt solid content preferably has a penetration (25 ° C.) of about 40 to 100 in consideration of the properties after decomposition and curing.

In the present invention, the asphalt emulsion comprises:
From the viewpoint of increasing the adhesive strength with the rubber piece, it is desirable that the rubber be modified. As the modifier, various kinds of commonly used natural rubber, synthetic rubber, synthetic resin and the like can be used, but from the relationship with the rubber piece described later, natural rubber, catapult, cyclized rubber, styrene・ Butadiene rubber (SB
R), styrene / isoprene rubber, polyisobutylene rubber, butadiene rubber, chloroprene rubber, butyl rubber,
Halogenated butyl rubber, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene propylene rubber, EP
T rubber, alphin rubber, styrene / butadiene / styrene copolymer rubber (SBS), styrene / isoprene block copolymer rubber, and the like are desirable. Among them, styrene / butadiene rubber (SBR) or styrene / butadiene / styrene copolymer rubber (SBS) is preferred. Especially desirable. One of these modifiers may be used alone, or two or more of them may be used in combination. The use of a modifier made of the same material or the same type of material as the rubber pieces to be mixed is advantageous in that the effect of preventing separation between the modified asphalt emulsion and the rubber pieces is further enhanced.

The mixing ratio of the asphalt and the modifier in the asphalt emulsion is preferably in the range of 25 to 100 parts by weight of the modifier with respect to 100 parts by weight of the asphalt. If the amount of the modifier is less than 25 parts by weight, the adhesive strength and grasping power of the modified asphalt after the modified asphalt emulsion has hardened to rubber pieces and the like are inferior. If it exceeds 100 parts by weight, unnecessary adhesive force and grasping force are generated, and not only the mixing property and workability deteriorate, but also it is not economical.

The method for producing the modified asphalt emulsion used in the present invention is not particularly limited, and one or two or more of the above-mentioned asphalts and modifiers are appropriately mixed with each other to obtain a premix-type modified asphalt. It may be emulsified and dispersed in water using an appropriate emulsifier, dispersant, stabilizer or the like, or when using a latex or emulsion as a modifier, A post-mix type production method in which these modifiers are directly mixed with an oil-in-water asphalt emulsion may be used.

It is preferable to add a tackifier to the asphalt emulsion or the modified asphalt emulsion used in the present invention in order to improve the adhesion to the rubber piece. The compounding amount of the tackifier is preferably in the range of 0.1 to 50 parts by weight based on 100 parts by weight of asphalt in the asphalt emulsion or the modified asphalt emulsion to be used.

Usable tackifiers include conventional ones such as rosin (foral, superester) resins, terpene resins (Y resin, picolite, Zontak YS resin TO, creolone), petroleum resins and the like. but particularly petroleum resins, among others, petroleum resins to the C ₅ fraction as a raw material, or, preferably used C _5, C ₉ copolymer petroleum resin of C ₅ and C ₉ fraction as a raw material.

[0026] The petroleum resin as a raw material a C ₅ fraction, a polymer of C ₅ fraction The degradation products in the preparation of ethylene and propylene naphtha to pyrolysis, cyclopentadiene (CPD) And zinclopentadiene (DCPD)
Is high and the softening point is as high as 100 to 150 ° C. Further, the molecular weight is preferably from 200 to 2,000, and particularly preferably from about 1,000 to 1,500.

The C ₅ and C ₉ copolymerized petroleum resins have a softening point of ₉₀ to 180 ° C. and a molecular weight of about 300 to 3000, but those having a Gardner index of 6 or less and high transparency are preferable. Is preferably 100 ° C. or higher.

The amount of the asphalt emulsion or the modified asphalt emulsion used in the room temperature mixture for low-noise type elastic freezing-preventing pavement of the present invention is determined as an asphalt solid content based on 100 parts by weight of the dry weight of the rubber pieces and the aggregate. 5
A range of -35 parts by weight is preferred. If the amount of the asphalt emulsion or the modified asphalt emulsion is less than 5 parts by weight as asphalt solids, the amount as a binder will be insufficient, and the stability of the resulting pavement will be reduced. If the weight exceeds 35 parts by weight, flashing may occur at high temperatures in summer, and it is not economical.

Examples of the hydraulic inorganic material used in the room temperature mixture for low-noise type elastic freezing suppression pavement of the present invention include cement, anhydrous gypsum, hemihydrate gypsum, and powdery slag. It is preferable in terms of speed and physical properties after solidification.

As the cement to be used, ordinary Portland cement, early-strength Portland cement, ultra-high-strength Portland cement, moderately heated Portland cement, white Portland cement, blast furnace cement, silica cement, alumina cement, expansion cement, blast furnace colloid cement, colloid Examples include cement, ultra-rapid hardening cement, white cement, fly ash cement, sulfate-resistant cement, jet cement, and the like. In addition, a commercially available special cement can also be used.

In the present invention, the hydraulic inorganic material is effective not only for adjusting the pot life and the hardening time of the low-noise type room temperature mixture for freezing elastic freezing pavement, but also when a large amount of rubber pieces are mixed. It is extremely effective in maintaining the flow resistance and peeling resistance of the cured pavement.

The amount of the hydraulic inorganic material used is usually preferably in the range of 15 to 60 parts by weight based on 100 parts by weight of the asphalt emulsion or the modified asphalt emulsion. When the amount of the hydraulic inorganic material is less than 15 parts by weight, not only the curing of the mixture is slow but the stability is deteriorated, but also the pavement constructed has poor fluid resistance and peeling resistance. on the other hand,
When the amount of the hydraulic inorganic material exceeds 60 parts by weight, the mixture hardens too quickly, resulting in poor workability and miscibility, and a considerable improvement in flow resistance and peel resistance is observed. However, this is not preferable because it merely results in an expensive mixture.

In the present invention, in addition to the hydraulic inorganic material, commonly used admixtures such as a shrinkage inhibitor, a curing accelerator, a curing retarder, a dispersant, an air entrainer, a thickener, and a water reducing agent. It is also possible to use a filler and the like in combination.

The aggregate used in the present invention is an aggregate for pavement described in "Asphalt Pavement Outlines" issued by the Japan Road Association, and includes crushed stone, crushed stone, gravel, steel slag, and the like. In addition, asphalt-coated aggregates in which these aggregates are coated with asphalt or asphalt emulsion, recycled aggregates, and the like can also be used. Other granular materials similar to these include artificially fired aggregates, fired expanded aggregates, artificial lightweight aggregates, ceramic particles, luxovite, Sinopearl, aluminum particles, plastic particles, ceramics, emery, and the like.

The coarse aggregate used in the present invention is not particularly limited by the particle size range.
It is preferable to use No. 7 crushed stone having a size of 5 to 5 mm and No. 6 crushed stone having a particle size range of 5 to 13 mm. These aggregates may be used singly or in combination of two or more. Asphalt emulsion or straight asphalt of about 0.3 to 1% by weight based on the aggregate may be used for these aggregates. It is preferred to coat.

The fine aggregate used in the present invention generally has a particle size of 2.5 mm or less, and includes, for example, river sand, hill sand, mountain sand, screenings, crushed dust, artificial aggregate,
Stone powder, incinerator ash, clay, talc fly ash, carbon black, etc. In addition, for example, rubber powder, cork powder, wood powder, resin powder, pulp, silica sand, etc. Can be. Among them, river sand and stone powder are preferable from the viewpoint of the characteristics of the pavement obtained therefrom.

In the present invention, one or more of the above-mentioned coarse aggregate and fine aggregate may be used alone, and one or two or more of coarse aggregate and fine aggregate may be used, respectively.
Although a mixture of more than one kind may be used in combination, it is preferable to use a coarse aggregate and a fine aggregate in combination from the viewpoint of the characteristics of the obtained pavement.

The rubber piece used in the present invention is not particularly limited as long as it has a good binding property to the asphalt emulsion as a binder and is easily available, but styrene-butadiene rubber (SBR), chloroprene Rubber and the like are preferably used.

The particle size of the rubber piece depends on the particle size of the aggregate used, but if the particle size is too small, the desired elasticity cannot be imparted to the pavement, and conversely, the particle size becomes too large. If it is large, it becomes difficult to give sufficient fluidity resistance and peeling resistance to the pavement, so that it is generally preferably in the range of 0.3 to 10 mm, and particularly preferably in the range of 1 to 7 mm.

In the present invention, the compounding ratio of the aggregate and the rubber piece is as follows: weight: aggregate: rubber piece = (20-90);
It is preferably in the range of 0 to 10). If the compounding ratio of the rubber pieces is less than 10, the constructed pavement cannot be provided with sufficient elasticity necessary for suppressing freezing, and if the compounding ratio of the rubber pieces exceeds 80, the pavement will be insufficient. It is not preferable because it is not possible to maintain excellent fluid resistance and workability is deteriorated. In terms of the balance between elasticity, flow resistance, and peel resistance, the weight ratio of aggregate: rubber piece = (40-75) :( 6
The range of 0 to 25) is particularly preferred.

By pre-treating the rubber piece used in the present invention with an organic solvent, the adhesiveness with an asphalt emulsion or a modified asphalt emulsion as a binder can be further improved. That is, when a rubber piece is immersed in an organic solvent, the rubber piece absorbs solvent molecules and swells. When air-dried, the volume shrinks to the original size while gradually releasing the solvent. When this is used as the rubber piece of the present invention, a small amount of solvent is released at the interface between the asphalt as the binder and the rubber piece, and the asphalt as the binder is locally softened. Asphalt enters the unevenness of the surface of the rubber piece, and has an effect of improving the adhesiveness.

The organic solvent to be used is not particularly limited, but xylene, a mixed solution of acetone and methanol, a mixed solution of toluene and butanol, and the like are preferable. Among them, a mixed solution of acetone and methanol (acetone: methanol = 50: 50 by volume ratio)
And a mixed solution of toluene and butanol (toluene: butanol = 70: 30 by volume ratio) are particularly preferred.

The method of organic solvent treatment is not particularly limited as long as the rubber piece surface can be brought into contact with the organic solvent, but it is easiest to immerse the rubber piece in an organic solvent. . There is no particular limitation on the immersion time,
0.5 to 4 to sufficiently adsorb the organic solvent in the rubber piece
It is necessary to soak for 8 hours, preferably for about 2 to 24 hours. After the immersion, the rubber pieces are preferably dried.

Hereinafter, the present invention will be further described with reference to examples, but it is needless to say that the present invention is not limited to these examples.

[0045]

Example 1 SBR rubber was crushed and sieved, and 1 to 6 m
Using 31.2 parts by weight of rubber pieces, 58.8 parts by weight of No. 7 crushed stone (5 to 2.5 mm) as coarse aggregate, 10.0 parts by weight of coarse sand as fine aggregate, and asphalt As an emulsion, heated and melted straight asphalt (penetration 6
0-80) 100 parts by weight of styrene-butadiene copolymer rubber (SBR) (styrene / butadiene = 20/80)
26 parts by weight of the modified asphalt was emulsified with a cationic surfactant, and 16 parts by weight of an asphalt emulsion prepared so as to have an evaporation residue of 70% by weight was used. Portland cement as a hydraulic inorganic material was used. Specimens having a thickness of 5 cm were prepared by changing the amount of the sample, and a wheel tracking test and a labeling test were performed. Table 1 and FIGS. 1 and 2 show the amounts of the changed Portland cements and the test results. In addition, the numerical value of the result of a wheel tracking test and a labeling test is an average value of five test pieces.

[0046]

[Table 1]

The judgment is made based on the wheel tracking test value DS.
Is 1,500 times / mm or more, and the result of the labeling test is 1.2 cm ² or less, both satisfy the criterion of ◎, those satisfying either one are ○, those satisfying neither are satisfied X. In addition, "measurement impossible" in Table 1 indicates that the test piece was broken during the test and measurement was not possible. As is clear from the results shown in Table 1 and FIGS. 1 and 2, the test piece containing about 15% or more by weight of Portland cement with respect to the asphalt emulsion was an aggregate replacement type in which the rubber pieces used conventional hot asphalt. Despite being contained in a large amount as compared with the elastic freezing suppressing pavement mixture, satisfactory durability was exhibited.

[0048]

Example 2 Example 1 was repeated except that the asphalt emulsion was modified with various amounts of styrene / butadiene / styrene copolymer rubber (SBS) (styrene / butadiene / styrene = 30/70 by weight). Specimens were prepared by the test, and a wheel tracking test and a labeling test were performed.
The amount of SBS is the weight ratio (%) to the asphalt content in the used asphalt emulsion. However, the amount of Portland cement was fixed at 8 parts by weight. The results are shown in Table 2 and FIGS.

[0049]

[Table 2]

As is clear from the results in Table 2 and FIGS. 3 and 4, as the amount of the modifier increases, the DS value increases and the labeling test value decreases. This is presumably because the asphalt emulsion was modified to increase the adhesive strength with the rubber pieces. The DS value exceeds the criterion of 1,500 times / mm when the amount of the modifier relative to the asphalt solids is about 25 parts by weight.

[0051]

Example 3 The modifier was styrene-butadiene rubber (SB)
Instead of R), the sample was prepared in the same manner as in Example 2 except that the used amount was fixed at 40 parts by weight with respect to 100 parts by weight of the asphalt component in the asphalt emulsion, and the modified asphalt emulsion was further tackified. asphalt petroleum resin in the asphalt emulsion to C ₅ fraction and starting material as an agent 1
A wheel tracking test and a labeling test were performed in the same manner as in Example 2 using a test piece prepared by adding 4 parts by weight to 00 parts by weight. Table 3 shows the results.

[0052]

[Table 3]

As is evident from the results in Table 3, it can be seen that the durability of the constructed pavement is improved by adding a petroleum resin as a tackifier.

[0054]

Example 4 The same rubber piece 100 used in Example 1
100 parts by weight of a toluene mixture (toluene: butanol = 70: 30 by volume ratio) was added to the parts by weight, and the mixture was stirred gently so that dust on the surface of the rubber piece could be removed. After allowing to stand at room temperature for 24 hours, the solvent was decanted and the rubber pieces were air-dried. Air drying was performed at room temperature until the weight loss rate per hour was 0.002% or less. Example 3 except that this rubber piece was used.
Specimens were prepared in the same manner as described above, and a wheel tracking test and a labeling test were performed. The results are shown in Table 3.

As is clear from the results shown in Table 3, by treating the rubber pieces with the organic solvent, the DS value was improved, the labeling test value was reduced, and the durability of the pavement constructed as a whole was increased. You can see that there is.

[0056]

Example 5 A specimen was prepared in the same manner as in Examples 3 and 4, and ice having a thickness of about 5 mm was artificially frozen on the surface of the specimen. The icing exfoliation was tested under the applied dynamic load. In each of the specimens, it was observed that the ice frozen on the specimen surface was easily broken by the passage of the dynamic load and peeled off from the specimen surface.

[0057]

Example 6 A pavement having a width of 3.5 m and a length of 50 m was constructed using the same materials as those used in Example 4, and a small one-box car was driven at a speed of 30 k on the pavement.
The vehicle was run at m / h and 40 km / h, and rolling noise near the tire was measured, and a rolling noise frequency analysis (１ ／ octave frequency analysis) was also performed. For comparison, the same measurement was performed on a pavement constructed using the conventional dense-grained asphalt mixture (13). The results are shown in Table 4 and FIG.

[0058]

[Table 4]

As is clear from the results shown in Table 4, the pavement constructed using the low-noise elastic freezing-preventive pavement cold mixture of the present invention has a pavement made of the conventional dense-grained asphalt mixture (13). A remarkable noise suppression effect was recognized as compared with. Also, as is clear from the results of FIG.
In the pavement constructed using the low-noise elastic body freezing-preventive pavement cold mixture of the present invention, a remarkable noise reduction was observed over all the measured frequencies.

[0060]

As described above, the low-noise elastic freezing-preventive pavement mixture having both the low-noise function and the freezing-preventing function of the present invention uses a hydraulic inorganic material together with an asphalt emulsion. A large amount of rubber pieces can be compounded in the mixture without impairing the flow resistance and peeling resistance of the pavement to be used, and can be applied at room temperature. As a result, the pavement constructed using the low-noise elastic body freezing-prevention pavement room-temperature mixture of the present invention can not only be constructed safely and economically, but also exhibits an excellent noise suppression effect, It becomes possible to bend sufficiently by passing,
The ice frozen on the surface of the pavement also exhibits an excellent freezing suppressing effect that the ice is easily broken and peeled off from the surface of the pavement. These excellent effects are further enhanced by modifying the asphalt emulsion, and further enhanced by adding a tackifier to the asphalt emulsion or by previously treating a rubber piece with an organic solvent. As described above, the low-temperature-type elastic body freezing-preventing pavement of the present invention and the low-noise-type elastic body freezing-preventing pavement constructed using the same have extremely excellent effects and are extremely useful in industry. Invention.

[Brief description of the drawings]

FIG. 1 is a diagram showing the relationship between the results of a wheel tracking test and the amount of Portland cement.

FIG. 2 is a diagram showing a relationship between a labeling test result and an amount of Portland cement.

FIG. 3 is a diagram showing a relationship between a wheel tracking test result and an amount of SBS.

FIG. 4 is a diagram showing a relationship between a labeling test result and the amount of SBS.

FIG. 5 is a diagram showing a result of frequency analysis of rolling noise.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toru Suzuki 1-3-3, Ichijo 1-chome, Utsunomiya City, Tochigi Prefecture Room 503, Ichijo Sky Corp. issue

Claims (10)

[Claims] 1. A room-temperature mixture for a low-noise elastic freezing-suppressing pavement, comprising an aggregate, an asphalt emulsion, a hydraulic inorganic material and a rubber piece. 2. The low-noise elastic body according to claim 1, wherein the mixing ratio of the aggregate and the rubber piece is in the range of 80 to 10 of the rubber piece to 20 to 90 of the aggregate by weight. Room temperature mixture for anti-freeze pavement. 3. The room-temperature mixture for a low-noise elastic freezing suppressing pavement according to claim 1, wherein the hydraulic inorganic material is contained in an amount of 15 to 60 parts by weight based on 100 parts by weight of the asphalt emulsion. 4. The room-temperature mixture for low-noise elastic freezing-preventive pavement according to claim 1, wherein the asphalt emulsion is modified. 5. An asphalt emulsion comprising 25 to 10 parts by weight based on 100 parts by weight of asphalt in the asphalt emulsion.
The room-temperature mixture for a low-noise elastic body freezing suppression pavement according to claim 4, wherein the room-temperature mixture is modified with 0 parts by weight of a modifying agent. 6. The room-temperature mixture for low-noise elastic body freezing-prevention pavement according to claim 4 or 5, wherein the room-temperature mixture is modified by a modifier made of the same or similar material as the rubber piece. 7. The asphalt emulsion is used in an amount of 0.1 to 5 parts by weight per 100 parts by weight of asphalt in the asphalt emulsion.
The room-temperature mixture for a low-noise elastic body freezing prevention pavement according to claim 1, which contains 0 parts by weight of a tackifier. 8. The room-temperature mixture for low-noise elastic body freezing suppression pavement according to claim 7, wherein the tackifier is a petroleum resin. 9. The method according to claim 1, wherein the rubber pieces have been previously treated with an organic solvent.
6. The room-temperature mixture for low-noise elastic body freezing-prevention pavement according to 6, 7, or 8. 10. The method of claim 1, 2, 3, 4, 5, 6, 7,
10. A low-noise elastic body freezing-protecting pavement constructed using the low-temperature elastic-body-freezing-preventive pavement normal-temperature mixture according to 8 or 9.