JP2832870B2 - Permeable room temperature mixture and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permeable room temperature mixture which can be applied as a pavement material for surface layers such as sidewalks, general roads, highways, factory yards, airports and the like at room temperature, and a method for producing the mixture.

[0002]

2. Description of the Related Art In recent years, the so-called conventional soil surface has been drastically reduced due to pavement and structures in the urban area and its surroundings following the wave of urbanization, and penetration of rainwater and the like has been hindered.
Obstacles such as death of trees, land subsidence, and flooding of rivers due to torrential rain are frequently occurring. The permeable pavement has been implemented in response to such a problem, and has a function of immediately impregnating and draining rainwater and the like from a pavement pavement to prevent these obstacles.

[0003] The mixture of the permeable pavement has a porosity of at least 1 in order to allow rainwater or the like to penetrate into the lower part for the purpose.
About 5 to 25% is required. For this reason, the mixture of the aggregates is significantly different from that of the ordinary pavement mixture. For example, a mixture of a large amount of coarse aggregates such as open-grained asphalt concrete is included, and the mixture of the aggregates is poor. Therefore, the permeable pavement mixture has heretofore been mainly used only for sidewalks because of its poor deformation resistance against traffic loads.

[0004] However, recently, this permeable pavement has been tried on roadways, and has attracted attention.

In addition, due to the recent increase in traffic volume of large vehicles, pavement structure, weather conditions, etc., asphalt pavement has a rut.
Digging , unevenness, reduced flatness, fluidity phenomena, etc. have been conspicuously occurring. Further, the abrasion due spikes and Thailand <br/> Yachen in winter, pavement surface is subjected to significant wear. For this reason, puddles are formed on the pavement surface during rainfall, and there are concerns about driving errors caused by hydroplaning phenomena, slippage, splashing and visual field obstruction due to smoking, etc., which is one of the major causes of accidents and is a serious accident in traffic safety. It is a problem. Under such circumstances, countermeasures are urgently required, and practical use of permeable pavement is also urgently required on roadways. At present, permeable pavement is being experimentally implemented in various places.

[0006] When permeable pavement is carried out on a road, this is called drainage pavement. In drainage pavement, if rainwater etc. penetrates into the roadbed and subgrade, the bearing capacity decreases,
Generally, the lower layer of the drainage pavement is a dense pavement, and has a structure in which permeated rainwater and the like are drained to the road shoulder. Also,
Since the drainage pavement has a large gap, the gap absorbs the running noise of the vehicle, which has the effect of reducing noise, and is sometimes called low-noise pavement. Attention has been paid.

[0007] The drainage pavement mixture, as described above,
Compared with a normal pavement mixture, the mixture has larger voids, that is, because of a small amount of fine particles in the mixture of the aggregate, the strength due to the engaging effect of the aggregate cannot be expected. Therefore, in order to increase the stability of the drainable pavement mixture, a binder having a strong grasping force for strongly bonding between aggregates is required. In addition, since the drainable pavement mixture is used for general roadways, highways, and the like, it is required to have high dynamic stability. For that, the softening point is high,
It is necessary to use a binder having a high viscosity at 60 ° C.

For this reason, the binder for the drainable pavement mixture is a modified asphalt modified with a polymer, which is described in the “Asphalt Pavement Guidelines” published by the Japan Road Association. An ultra-high viscosity modified asphalt having a much higher softening point than asphalt type II and a high viscosity at 60 ° C. (about 200,000 poise or more) is used. Furthermore, since the drainage pavement mixture is apt to deteriorate due to direct sunlight or air due to its large voids, it is necessary to increase the thickness of the binder with respect to the aggregate. Therefore, it is necessary to increase the viscosity of the binder at a high temperature to reduce the "sag" at the time of work, and it is necessary to use not only the above-mentioned ultra-high viscosity improving asphalt, but also a modified asphalt and a straight asphalt for planting. In some cases, a synthetic fiber, a fibrous filler, or the like is used in combination.

However, since the production and paving of these drainage pavement mixtures are all carried out by heating, the ultra-high-viscosity modified asphalt and the modified asphalt containing vegetable fibers used have a low viscosity due to temperature change. Because of the large fluctuations, it was necessary to pay close attention to temperature control, which was technically very difficult. The use of ultrahigh-viscosity modified asphalt improves the flow resistance at high temperatures, but it is still not satisfactory, and further improvement is required.

[0010]

SUMMARY OF THE INVENTION The present invention meets such a demand, and can be constructed at room temperature, does not require temperature control, and has a high-concentration and high-viscosity modified asphalt having a high aggregate surface. It is coated with a thick film of emulsion, and by dispersing filler and hydraulic inorganic material in the film, no sagging occurs during work and modified asphalt emulsion by hydration reaction with hydraulic inorganic material By providing a strong and thick coating of modified asphalt on the surface of the aggregate after decomposition and hardening, a water-permeable room-temperature mixture having excellent durability, fluid resistance, and abrasion resistance and a method for producing the same are provided. Things.

That is, the present invention relates to a method for producing rubber,
Tylene-vinyl acetate copolymer, ethylene acrylate
Copolymer, polyethylene, vinyl acetate / acrelay
One or two or more selected from copolymers
Modified and emulsified modified asphalt emulsion or asphalt
Rubber, ethylene-vinyl acetate copolymer,
Ethylene acrylate copolymer, polyethylene, acetic acid
One selected from vinyl acrylate copolymer or
Is a modified asphalt emulsion modified by mixing two or more
Accordingly, the surface of the aggregate is coated , and a filler and a hydraulic inorganic material are dispersed in the coating film, a water-permeable room-temperature mixture , and a cured product thereof, and 100 parts by weight of the aggregate. On the other hand, 1) 1 to 5 parts by weight of filler, 2) hydraulic inorganic
Materials 1 to 15 parts by weight, 3) Rubber and ethylen on asphalt
Vinyl acetate copolymer, ethylene acrylate copolymer
Polymer, polyethylene, vinyl acetate / acrylate
Modification by mixing one or more selected from polymers
And emulsified modified asphalt emulsion or asphalt
Rubber, ethylene-vinyl acetate copolymer, ethyl
Len-acrylate copolymer, polyethylene, vinyl acetate
Or 2 selected from acrylate / acrylate copolymers
Modified asphalt emulsion 3-1 mixed with at least two or more seeds
The present invention relates to a method for producing a water-permeable room-temperature mixture, wherein 5 parts by weight are added and mixed.

Hereinafter, the present invention will be described in detail.

The aggregate used in the present invention is no different from the aggregate normally used for asphalt pavement. Further, in the present invention, according to the description of the “Asphalt Pavement Outline”, the aggregate that stops on the 2.36 mm sieve is referred to as coarse aggregate, and the aggregate that passes through the 2.36 mm sieve, and passes through the 2.36 mm sieve.
The aggregate that stops on the 075 mm sieve is fine aggregate and 0.07
What passes through a 5 mm sieve is called a filler.

Examples of general coarse and fine aggregates include crushed stone, crusher run, screenings, crushed dust, sand and the like. In addition, light-colored aggregates and hard aggregates can also be used. Light-colored aggregates include, for example, loxobite, perilla, aluminum grains, ceramic grains, plastic grains, and colored aggregates. Examples of the hard aggregate include emery and silica sand. Examples of the filler include a filler for screening, stone powder, incinerator ash, clay, talc, fly ash, and carbon black. In addition, rubber powder, cork powder, wood powder,
Short fibers such as resin powder, inorganic fibers, pulp, synthetic fibers, and carbon fibers can be used in combination as a part of the filler.
As a part of the aggregate, pre-coated with asphalt
Aggregate can also be used.

The blending amount of the filler with respect to 100 parts by weight of the aggregate can vary depending on the type of the aggregate, the type of the filler, the composition of the modified asphalt emulsion and the like, but is usually in the range of about 1 to 5 parts by weight. If the amount is less than 1 part by weight, it is insufficient to form a thick coating film of the modified asphalt emulsion on the surface of the aggregate, while if it exceeds 5 parts by weight, the modified asphalt emulsion for the aggregate is insufficient. On the contrary, the adhesiveness and coatability tend to decrease.

The hydraulic inorganic material used in the present invention includes cement, anhydrous gypsum, gypsum hemihydrate, powdered blast furnace slag, and the like. As cement, ordinary Portland cement, early strength Portland cement, ultra-high strength Portland cement, moderate heat Portland cement, white Portland cement, blast furnace cement, silica cement, fly ash cement, alumina cement, expansion cement,
Sulfur-resistant cement, jet cement, blast furnace colloid cement, colloid cement, ultra-rapid hardening cement, etc.

The amount of the hydraulic inorganic material used is usually about 1 to 15 parts by weight, more preferably about 3 to 9 parts by weight, based on 100 parts by weight of the aggregate. The amount of hydraulic inorganic material is
When the amount is less than 1 part by weight, the stability of the cured product in the permeable room temperature mixture is reduced. On the other hand, when the amount is more than 15 parts by weight, the rigidity of the cured product in the permeable room temperature mixture becomes too strong, causing deflection. Loss of properties, causing cracking. In addition, together with the hydraulic inorganic material, if necessary, a known cement admixture, for example, a shrinkage compensating material, a hardening accelerator, a hardening retardant, a dispersant, an air entraining agent, a thickener, a water reducing agent, a filler Can be used in combination.

[0018] Asphalt emulsions can be cationic, anionic or non-ionic depending on the type of surfactant used as an emulsifier.
The asphalt emulsion used in the present invention is classified into a nonionic type and the like, and any type of asphalt emulsion may be used as long as it is a modified asphalt emulsion.

Examples of the cationic, anionic and nonionic modified asphalt emulsions used in the present invention include natural asphalt, straight asphalt, blown asphalt, semi-blown asphalt, solvent deasphalted asphalt (for example, propane deasphalted asphalt) and the like. Emulsifier, dispersant, modified asphalt modified by a premix type method in which one or more kinds of petroleum asphalts are mixed with one or more kinds selected from rubber and thermoplastic polymer An oil-in-water type modified asphalt emulsion emulsified and dispersed in water by using a stabilizer or the like, wherein the modified asphalt emulsion is well mixed with an aggregate, a filler and a hydraulic inorganic material. Alternatively, a modified asphalt emulsion modified by a post-mix type method in which one or more selected from rubber and a thermoplastic polymer are directly mixed with an oil-in-water asphalt emulsion is used.

[0020] Rubber and Thermoplastic polymer polymer is used in the modified asphalt emulsion, for example, natural rubber, Gatabacha, cyclized rubber, styrene-butadienyl Engomu, styrene Yi Sopurengomu, isoprene rubber, polyisoprene rubber, butadienyl Engomu, chloroprene rubber, blanking chill <br/> rubber, halogenated butyl rubber, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene-propylene rubber, EPT rubber, alfin rubber, styrene-butadienyl et <br/> down block polymer rubber, rubber such as styrene-isoprene block polymer rubber, and ethylene-vinyl acetate copolymer, ethylene-acrylate copolymer, polyethylene, vinyl acetate-acrylate copolymer. One or more of these are used. In addition, rubber and the above-mentioned thermoplastic high-molecular polymer in various shapes and forms are used. For example, powdery, granular, latex, emulsion, aqueous, etc. These latex, emulsion, and water-based emulsions are used in modified asphalt emulsions by a post-mix type method.
Of course, these are also used for modified asphalt emulsions by a premix type method.

Along with the rubber and the thermoplastic polymer, a thermoplastic solid resin or a solid rubber, a liquid resin, a softener, as a tackifier to improve adhesion and compatibility.
Addition of a plasticizer or the like is also performed. For example, b-di <br/> down and its derivatives, terpene resin and petroleum resin and derivatives thereof, alkyd resins, alkylphenol resins, terpene phenol resins, coumarone-indene resins, synthetic terpene resin, alkylene resins, polyisobutylene, polybut
Di ene, polybutylene te emissions, a copolymer of isobutylene and porcine di ene, mineral oil, process oil, pine oil, Ann preparative spiral oil, pine oil, a plasticizer, animal and vegetable oils, and polymerized oil. Further, an antioxidant, an antioxidant, sulfur and the like can be added. Further, for the purpose of adjusting the viscosity of the modified asphalt emulsion, a water-soluble polymer protective colloid such as MC, CMC, HEC, PVA, or gelatin can be added.

The mixing ratio of the asphalt to the rubber and the thermoplastic polymer in the modified asphalt emulsion is about 10 to 100 parts by weight, more preferably about 20 to 50 parts by weight, per 100 parts by weight of the asphalt. is there. When the amount of the rubber and the thermoplastic polymer is less than 10 parts by weight, the modified asphalt emulsion decomposes and cures, but after the modified asphalt has poor adhesion to the aggregate and poor grasping power, it has a weight of 100 parts by weight. If it exceeds the part, the cohesive force is too strong, and it is easy to peel off from the aggregate, and it is not economical. As the asphalt in the modified asphalt emulsion, it is preferable to use one having a penetration (25 ° C.) of about 40 to 300 in consideration of the properties after decomposition and hardening. The concentration of evaporation residue (solid matter) of the modified asphalt emulsion is usually about 50 to 70% by weight.
In the present invention, those having as high a concentration as possible are preferred.

If necessary, a reactive water-soluble synthetic resin or emulsified synthetic resin and a curing agent thereof can be added to the asphalt emulsion as a modified asphalt emulsion.

The amount of the modified asphalt emulsion used was as follows:
The amount is usually about 3 to 15 parts by weight, more preferably about 5 to 12 parts by weight based on 00 parts by weight. When the amount of the modified asphalt emulsion is less than 3 parts by weight, the coating thickness of the modified asphalt emulsion on the aggregate is insufficient, and the excellent function as a water-permeable room temperature mixture is not exhibited, and the durability is poor. On the other hand, if it is more than 15 parts by weight, the stability of the water-permeable room temperature mixture is rather lowered.

The permeable room-temperature mixture according to the present invention usually comprises
It is prepared according to the following procedure.

Table 1 shows an example of combinations of typical materials constituting the permeable room-temperature mixture according to the present invention.

[0027]

[Table-1]

1) Preparation of Type A Permeable Room-Temperature Mixture Type A has a porosity of 20-30% for the permeable room temperature mixture.
Suitable for the preparation of a range of degrees. The preparation of the A-type permeable room-temperature mixture is performed using a mixer such as a pugmill mixer. First, a required amount of No. 5 crushed stone is put into a mixer, and then a required amount of coarse sand, a filler, and a hydraulic inorganic material are added in this order, and kneading is performed for about 3 to 5 seconds. Thereafter, the required amount of the modified asphalt emulsion is added to the mixture, and the mixture is mixed in a mixer for about 15 to 25 seconds to obtain the water-permeable room-temperature mixture of the present invention. That is, the surface of the aggregate is coated with a thick coating of a high-concentration and high-viscosity modified asphalt emulsion, and the filler and the hydraulic inorganic material are dispersed in the coating. After the modified asphalt emulsion decomposes and hardens due to the hydration reaction of the hydraulic inorganic material without forming, a permeable room temperature mixture is obtained in which a strong thick film of the modified asphalt is formed on the aggregate surface. be able to.

The water content of the water-permeable room-temperature mixture is usually sufficient only by the water content derived from the modified asphalt emulsion, but if the water content is insufficient, for example, water for hydration of the hydraulic inorganic material is insufficient. In such a case, when an admixture, a filler and the like are used in combination, when the consistency is adjusted to ensure workability, water may be appropriately supplied.

2) Preparation of Type B Water Permeable Room Temperature Mixture Type B is prepared so that the porosity of the water permeable room temperature mixture is in the range of about 15 to 25%. The method for preparing the B-type permeable room-temperature mixture is the same as the preparation method of 1) except that No. 5 crushed stone is used instead of No. 5 crushed stone, and therefore a description thereof will be omitted.

In addition to the above, the water-permeable room-temperature mixture of the present invention can of course be obtained by a method of preparing a combination of the A type and the B type, that is, a combination of the No. 5 crushed stone and the No. 6 crushed stone. .

After kneading only the aggregate with a mixer, a modified asphalt emulsion is added together with a filler and a hydraulic inorganic material, followed by mixing to obtain the water-permeable room-temperature mixture of the present invention.

The pot life of the permeable room temperature mixture of the present invention is as follows:
Although it can be adjusted according to the mixing ratio of each material, it is usually preferably about 2 hours in consideration of the time required for transportation and pavement and the demand for early traffic release after pavement. Of course, the pot life can be changed as appropriate depending on the conditions.

The permeable room-temperature mixture according to the present invention is laid as a surface layer of a drainage pavement on a sidewalk or a roadway in the same manner as a known asphalt mixture. When the permeable room-temperature mixture of the present invention is used, the pavement method and the machinery to be used are the same as those of the known asphalt mixture except that heating is not required.

[0035]

EXAMPLES Examples will be shown below to further illustrate the features of the present invention.

[0036]

Example 1 70 parts by weight of heated and melted straight asphalt (penetration of 150 to 200), 5 parts by weight of process oil, and styrene-butadiene block polymer rubber 2
An asphalt emulsion (70% by weight of an evaporation residue) obtained by emulsifying a modified asphalt prepared by mixing 0 parts by weight and 5 parts by weight of a petroleum resin with a cationic surfactant was used as a modified asphalt emulsion.

In a pug mill mixer, 85 parts by weight of No. 6 crushed stone,
10 parts by weight of coarse sand, 1 part by weight of stone powder, and 4 parts by weight of ultra-high-strength Portland cement (manufactured by Osaka Cement Co., Ltd.) are charged in the above-described order, and kneaded and mixed for about 3 seconds. 10 parts by weight of the modified asphalt emulsion was charged and mixed for about 15 seconds.

A specimen for a marshalling stability test was prepared using the water-permeable room temperature mixture thus obtained at room temperature and 50 times on one side, and after curing at room temperature (20 ° C.) for 7 days. A degree test (60 ° C., 30 minutes) was performed.

As a result, the density was 1.985 g / cm ³ , the porosity was 18%, the Marshall stability was 1280 kg, and the flow value (1/100 cm) was 15.

Further, the obtained water-permeable room-temperature mixture was rolled with a roller compactor to obtain a 30 cm × 30 cm ×
After preparing a 5 cm test specimen and curing it at room temperature (20 ° C.) for 7 days, a test temperature of 60 ° C. and a load capacity were obtained by the wheel tracking test method described in the “Pavement Test Method” column issued by the Japan Road Association. (Ground pressure) 6.4 + 0.15Kg
/ Cm ² , the density was 2.002 g / cm 2
^{In 3} , the dynamic stability (DS) was 15750 times / mm.

Further, a sample prepared by the same procedure as the test sample for the marshall stability test was cured at room temperature (20 ° C.) for 7 days, and the test sample was put in a Los Angeles tester.
The loss amount (also called Cantablo test method) after being rotated for 10 minutes (300 rotations) was 3%.

Further, a test piece prepared according to the same procedure as the test piece for the wheel tracking test was cured at room temperature (20 ° C.) for 7 days, and then subjected to a water permeability test. As a result, the water permeability coefficient was 2.5 × 10 ^−1. In cm / aec, a sufficient water-permeability function was obtained as a water-permeable room-temperature mixture.

Similarly, a test piece prepared in the same procedure as the test piece for wheel tracking test was cured at room temperature for 7 days, and then subjected to a chain labeling test (−10 ° C., 1.5 hours). 1.5 cm ² , 1.5 to 2.0 c of the amount of abrasion of ordinary dense grain ascon (13)
m is ² smaller value, excellent water permeability cold mixture in abrasion student was obtained.

[0044]

Example 2 Anionic asphalt emulsion modified by mixing 60 parts by weight of an anionic asphalt emulsion (70% by weight of evaporation residue) with 30 parts by weight of SBR latex and 10 parts by weight of acrylic emulsion (evaporation residue) 62% by weight) was used as the modified asphalt emulsion.

In a pug mill mixer, 85 parts by weight of No. 5 crushed stone,
10 parts by weight of coarse sand, 1 part by weight of stone powder, and 4 parts by weight of ultra-high-strength Portland cement (manufactured by Osaka Cement Co., Ltd.) are charged in the order described above, and the mixture is kneaded for about 3 seconds, and then modified while mixing. 10 parts by weight of high-quality asphalt emulsion,
Mix for about 20 seconds.

A test was carried out in the same manner as in Example 1 using the water-permeable room-temperature mixture thus obtained. The results were as follows.

The results of the Marshall stability test indicate that the density is 1.
893 g / cm ³ , porosity was 24%, Marshall stability was 1250 Kg, and flow value (1/100 cm) was 14.

As a result of the wheel tracking test, the density was 1.912 g / cm ³ and the dynamic stability (DS) was 1680.
It was 0 times / mm.

The results of the cantalob test showed that the loss amount was 8
%, And the permeability test result shows that the permeability coefficient is 4.0 × 10
^-1 cm / sec. As in Example 1, a water-permeable room temperature mixture having a sufficient water-permeable function was obtained.

Further, as a result of the chain labeling test, the amount of abrasion was 1.0 cm ² .

[0051]

Example 3 63 parts by weight of heated and melted straight asphalt (penetration 150 to 200), 7 parts by weight of process oil, styrene / isoprene block polymer rubber 2
0 parts by weight, 5 parts by weight of ethylene / vinyl acetate copolymer,
An asphalt emulsion (70% by weight of an evaporation residue) obtained by emulsifying a modified asphalt mixed with 5 parts by weight of a petroleum resin with a nonionic surfactant was used as the modified asphalt emulsion.

In a pug mill mixer, 34 parts by weight of crushed stone No. 5
No. 6 crushed stone 51 parts by weight, coarse sand 10 parts by weight, stone powder 1 part by weight, Lion High Set Cement (Osaka Cement Co., Ltd.)
4 parts by weight) were added in the order described above, and kneaded and mixed for about 5 seconds. Then, 10 parts by weight of the modified asphalt emulsion was added while mixing, and mixed for about 20 seconds.

A test was carried out in the same manner as in Example 1 using the thus obtained permeable room-temperature mixture. The results were as follows.

The results of the Marshall stability test indicate that the density is 1.
965 g / cm ³ , porosity was 21%, Marshall stability was 1300 Kg, and flow value (1/100 cm) was 15. The wheel tracking test results show that the density is 1.
983 g / cm ³ and dynamic stability (DS) were 17,500 times / mm.

In addition, the loss amount of the cantablo test was 6%.
And the permeability test result shows that the permeability coefficient is 3.0 × 10 ^−1.
cm / sec. As in Example-1 and Example-2, a water-permeable mixture having a sufficiently water-permeable function was obtained.

Further, as a result of the chain labeling test, the amount of abrasion was 1.0 cm ² .

[0057]

COMPARATIVE EXAMPLE As Comparative Example 1, heated asphalt (penetration of 60 to 80) was heated and melted with heated aggregate having the same aggregate composition as in Example 1 (the cement was replaced with stone powder). A test was conducted in the same manner as in Example 1 using a mixture containing 5 parts by weight, and the results were as follows.

The results of the Marshall stability test show that the density is 1.
899 g / cm ³ , porosity was 23%, Marshall stability was 230 Kg, and flow value (1/100 cm) was 28.

As a result of the wheel tracking test, the test piece was broken about 20 minutes after the start of the test in a state where the density was 1.902 g / cm ³ and the dynamic stability (DS) could not be measured.

Further, the results of the cantaburo test show that the loss amount is 48
%, And the permeability test result shows that the permeability coefficient is 3.0 × 10
^-1 .

Further, the results of the chain labeling test were not measurable because the aggregate scattered during the test.

As Comparative Example-2, a commercially available aggregate having a viscosity at 60 ° C. of 200,000 poise or more was obtained by heating and melting a heated aggregate having the same aggregate composition as in Example-1 (the cement was replaced by stone powder). The same test as in Example 1 was carried out using a mixture containing 4.8 parts by weight of the modified asphalt. The results were as follows.

The results of the Marshall stability test were as follows.
965 g / cm ³ , porosity was 21%, Marshall stability was 610 kg, and flow value (1/100 cm) was 23.

As a result of the wheel tracking test, the density was 1.998 g / cm ³ , and the dynamic stability (DS) was 350
It was 0 times / mm.

The results of the cantaburo test show that the loss amount is 2
0%, and the permeability test result shows that the permeability coefficient is 4.0 × 10
^-1 cm / sec. Furthermore, as a result of the chain labeling test, the amount of abrasion was 10.0 cm ² .

Table 2 summarizes the results of the above Examples and Comparative Examples.

[0067]

[Table-2]

Example-1, Example-2 and Example-3
Compared with Comparative Example-1 and Comparative Example-2, the water permeability has a water permeability function in the order of 10 ^-1 , but in comparison with Comparative Example-1, Compared to the heated asphalt mixture, the permeable room-temperature mixture has about five times the martial stability and the dynamic stability (DS) is incomparable, indicating that it has excellent flow resistance to traffic loads. In addition, the amount of abrasion in the results of the chain labeling test was not comparable, indicating that the abrasion resistance was excellent. Furthermore, in comparison with Comparative Example-2, the water-permeable room-temperature mixture of the present invention has a value of about twice the mechanical stability and a dynamic stability (DS) of about 4 as compared with the ultra-high-viscosity modified asphalt heated mixture. It is twice as large, indicating that it is stable against traffic loads and has excellent flow resistance especially at high temperatures in summer. Further, it can be seen that the abrasion amount in the chain labeling test is about 10 times, which is excellent in wear resistance.

[0069]

Example 4 The permeable room temperature mixture obtained in Example 1 was
Used for actual pavement.

First, a cationic asphalt emulsion for penetration (52% by weight of evaporation residue) was used as a tack coat on an existing dense-grained asphalt concrete pavement surface in an amount of 0.3 l / l.
After spraying at a rate of m ² , the water-permeable room-temperature mixture of Example 1 was heated to 100 K using an asphalt finisher.
g / m ² . The supply of the permeable room-temperature mixture to the asphalt finisher was performed from a dump truck as in the case of the usual heated asphalt mixture. The compaction was performed only by the vibration of the asphalt finisher, and the roller was not compacted. However, the road surface was finished flat and there was no surface roughness.

One month has passed since the opening of the traffic, but the pavement made of the permeable room temperature mixture has a good drainage function during rainfall.
No cracks, no flow due to traffic load, no flash of asphalt, etc. occurred, and the condition was extremely good.

[0072]

As described above, according to the present invention, the following effects can be obtained.

1) Since the water-permeable room-temperature mixture of the present invention can be produced at room temperature, equipment and steps are simplified, and there is no need for temperature control, so that a product of stable quality can be obtained. In addition, the resulting permeable room temperature mixture can be paved at room temperature without heating, as in the case of manufacturing,
The need for difficult temperature management as in the past has been eliminated.

2) The water-permeable room-temperature mixture of the present invention has the aggregate surface coated with a thick coating of a high-concentration and high-viscosity modified asphalt emulsion, in which the filler and the hydraulic inorganic material are dispersed. Because it is shaped, "drip" during work
In addition, a small amount of hydraulic inorganic material accelerates the decomposition of the modified asphalt emulsion, and after the modified asphalt emulsion decomposes and hardens, it becomes a stronger film of the modified asphalt. It is not affected by the influence of air and air, has excellent weather resistance, and has an excellent effect on stability against traffic loads, particularly flow resistance at high temperatures in summer.

3) The water-permeable room-temperature mixture of the present invention has a strong bonding force after the modified asphalt emulsion is decomposed and cured, so that the aggregate is not scattered and the abrasion resistance is excellent.
Therefore, it is possible to add a large amount of the modified asphalt emulsion, and the flow resistance in summer is high and the durability is good. Also, it has good wear resistance in winter.

4) The water-permeable room-temperature mixture of the present invention can easily secure the porosity, and has an excellent water-permeability function, which is its original purpose, over its retention.

────────────────────────────────────────────────── (5) Continuation of the front page (51) Int.Cl. ⁶ identification code FI C04B 14:02) (C04B 28/02 24:36 20:10) (56) References JP-A-48-45524 (JP, A JP-A-50-12 (JP, A) JP-A-51-20220 (JP, A) JP-B-53-47264 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) C04B 28/02 C04B 26/26 E01C 7/18

Claims (3)

(57) [Claims] (1) Asphalt is made of rubber, ethylene / acetic acid
Neil copolymer, ethylene acrylate copolymer,
From ethylene, vinyl acetate / acrylate copolymer
One or two or more selected are mixed, modified and emulsified.
Modified asphalt emulsion or asphalt emulsion
System, ethylene-vinyl acetate copolymer, ethylene
Relate copolymer, polyethylene, vinyl acetate
One or two or more selected from the related copolymers
The modified asphalt emulsion, modified by adding
A water-permeable room-temperature mixture having a surface coated thereon, wherein a filler and a hydraulic inorganic material are dispersed in the coating film. 2. The permeable room-temperature mixture according to claim 1.
Cured product . 3. 100 parts by weight of aggregate, 1) filler
1 to 5 parts by weight, 2) 1 to 15 parts by weight of hydraulic inorganic material,
3) Asphalt with rubber, ethylene and vinyl acetate
Compound, ethylene acrylate copolymer, polyethylene
Selected from vinyl acetate and acrylate copolymers
One or two or more types are mixed and modified to form an emulsified modified
Rubber, ethyl, etc. in asphalt emulsion or asphalt emulsion
Len-vinyl acetate copolymer, ethylene acrylate
Copolymer, polyethylene, vinyl acetate / acrylate
Method for producing a water permeable cold mixture characterized admixing one or modified asphalt emulsion 3-15 parts by weight of modified by mixing two or more selected from the copolymerization product.