JP2003206504A - Water permeable concrete product for pavement and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water permeable concrete product for pavement applicable to a heavy traffic roadway and provide a manufacturing method therefor. <P>SOLUTION: The concrete product for pavement formed by molding concrete into a predetermined shape is constituted into a composite member whose binder of concrete molded object is cement and asphalt emulsion. In the manufacturing method therefor, cement of 1 to 25 mass parts and asphalt emulsion of 1 to 25 mass parts and admixture for cement as required are mixed with aggregate of 100 mass parts, vibration and compression force are applied to the mixture in a predetermined mold, and a molding removed from the mold after molding is cured at 5 to 80°C. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement material for paving on the ground such as roads and yards, and more particularly to a water-permeable concrete product for pavement applicable to heavy traffic roads and a method for producing the same.

[0002]

2. Description of the Related Art Water-permeable and drainage pavement is a technology that has been attracting attention in recent years due to the construction of a water circulation society, the effect of reducing vehicle noise, the effect of suppressing the heat island phenomenon, and the like. As a means to achieve them, cement concrete
Water permeability / drainage pavement, asphalt water permeability /
There are drainage pavement and concrete product-based permeable and drainage pavement pavement. Each has its own characteristics, but the advantage of constructing a water-permeable / drainable pavement with concrete products is that it is easy to follow the deformation of the ground, is easy to construct, is easy to repair, and has various colors, shapes, and patterns. It contributes to landscape formation, improves water permeability and water retention, and facilitates effective use of by-product aggregate. An interlocking block is commercially available as a concrete product for paving for roadways.

[Problem] However, according to “Interlocking Block Pavement Technology Association“ Interlocking Block Pavement Design and Construction Procedure ”, the interlocking block is an intermediate product between B traffic and C traffic, which are classified as ordinary goods. It is applicable to heavy vehicle traffic of up to 2,000 vehicles / day, and cannot be applied to heavy traffic of heavy vehicle traffic of 2,000 vehicles / day or more. Furthermore, the water-permeable interlocking block has a high porosity of about 20%, so it is limited to sidewalk applications. As described above, application of the water-permeable interlocking block to the roadway is limited, and various development studies are being conducted for the application. However, the permeable interlocking blocks applicable to heavy traffic roads are not yet generalized.

[0004]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to solve the above problems and provide a permeable concrete product for pavement that can be applied to heavy traffic roads and a method for producing the same.

[0005]

As a result of earnest research to solve the above problems, it is possible to produce a water-permeable concrete product for paving which can be applied to a heavy traffic road by using cement and an asphalt emulsion as a binder. It was discovered that they existed, leading to the present invention.

That is, the present invention provides a pavement permeable concrete product according to claim 1, which is a concrete product for pavement made by molding the concrete into a predetermined shape. The binder is a composite material of cement and asphalt emulsion.

Further, the water-permeable concrete product for pavement according to claim 2 has cements 1 to 2 per 100 parts by mass of aggregate.
A composition comprising 5 parts by mass and 1 to 25 parts by mass of asphalt emulsion is molded into a predetermined shape and then cured and cured. The water-permeable concrete product for paving according to claim 3 is characterized in that by-products such as steel slag, waste porcelain, waste glass, waste plastic, and sewage sludge molten slag are used as aggregate. .

The method for producing a water-permeable concrete product for pavement according to claim 4 is as follows. 1 to 25 parts by mass of cement and 1 to 25 parts by mass of asphalt emulsion are added to 100 parts by mass of aggregate as required. It is characterized by mixing cement admixture, applying vibration and compressive force to it with a predetermined mold, and removing the molded product after molding at a temperature of 5 to 80 ° C. is there.

As a result, it is possible to provide various shapes of water-permeable concrete products for pavement depending on the traffic volume. And when used on the sidewalk, 30x30x5c
It can be applied from a flat plate of m to a block shape of 10 × 20 × 5 to 10 cm. Moreover, when applied to a heavy traffic roadway, a block shape is suitable. At this time, the aggregate used may be ordinary crushed stone that is usually used, but by-products such as steel slag, waste porcelain, waste glass, waste plastics, and sewage sludge molten slag can be used effectively. It will be possible.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to embodiments. However, this embodiment is specifically described in order to better understand the gist of the invention, and does not limit the content of the invention unless otherwise specified.

The water-permeable concrete for pavement of this embodiment
The concrete product is a concrete product for paving, in which the concrete molded binder is a composite of cement and asphalt emulsion, and the concrete is molded into a predetermined shape. The concrete product has good water permeability for paving. -It is a product.
In addition, in this water-permeable concrete product for paving, aggregate 10
A composition comprising 1 to 25 parts by mass of cement and 1 to 25 parts by mass of asphalt emulsion to 0 parts by mass is molded into a predetermined shape, cured, and cured.

(1) Aggregate As the aggregate to be used, an aggregate used for ordinary asphalt pavement can be used. However, the aggregate, according to the classification of "asphalt pavement summary" in this specification,
Aggregate that stops at 2.36mm screen is called coarse aggregate, 2.36mm
The aggregate that passes through the sieve and stops at the 0.075 mm sieve is called fine aggregate. The coarse aggregate and the fine aggregate include crushed stone, crusher run, crushed sand, natural sand and the like. In addition, light-colored aggregate, hard aggregate, and recycled aggregate can also be used. In addition to these, by-product aggregate can also be used.

Examples of the light-colored aggregate include loxobarite, synopearl, aluminum particles, ceramic particles, plastic particles, and colored aggregate. Examples of hard aggregates include emery and silica sand. Recycled aggregate includes
There are recycled asphalt aggregate recycled from asphalt lumps and recycled concrete aggregate recycled from concrete lumps. By-product aggregates include various slag aggregates, waste porcelain aggregates, waste glass aggregates, waste plastic aggregates. Examples of various slag aggregates include general steel slag aggregates, sewage sludge molten slag aggregates, and the like. The use of these by-product aggregates can contribute to the construction of a resource recycling society.

The mixing ratio of the coarse aggregate and the fine aggregate differs depending on the maximum particle size of the coarse aggregate. The amount of fine aggregate used is 0 to 10 parts by mass of coarse aggregate when the maximum grain size of coarse aggregate is 5 mm.
Parts by mass, preferably 0-5 parts by mass. If the maximum particle size of coarse aggregate is 13 mm, 2 to 20 per 100 parts by weight of coarse aggregate
Parts by mass, preferably 3 to 15 parts by mass. When the maximum particle size of the coarse aggregate is 20 mm, it is 3 to 30 parts by weight, preferably 5 to 20 parts by weight, based on 100 parts by weight of the coarse aggregate. When the maximum particle size of the coarse aggregate is 13 mm or more, if the fine aggregate is less than the specified amount, the film thickness of the binder is reduced, and the scattering resistance of the aggregate is reduced, which is not preferable. Further, in any particle size of the coarse aggregate, if the amount of the fine aggregate used exceeds the specified amount, the porosity decreases and the water permeability decreases, which is not preferable.

(2) Cement As the cement to be used, ordinary Portland cement, early strength Portland cement, super early strength Portland cement, moderate heat Portland cement, white Portland cement, blast furnace cement, silica cement, fly ash cement, alumina cement , Sulphate resistant cement, jet cement, ultra-fast cement. Further, as an admixture, an expansive material, gypsum, various slag powders, various fly ash, silica fume, or a color pigment as required can be used.

The amount of cement used varies depending on the particle size distribution of the aggregate, but is usually 1 to 25 parts by weight, more preferably 3 to 10 parts by weight, based on 100 parts by weight of the aggregate. When the amount of cement is less than 1 part by mass, the strength of the water-permeable concrete product decreases, while when it exceeds 25 parts by mass,
It is not preferable because the porosity of the water-permeable concrete product is lowered and the original water-permeable function as the water-permeable concrete product is not fulfilled. In addition, along with the cement, if necessary,
Known cement admixtures such as shrinkage-reducing agents, hardening accelerators, hardening retarders, dispersants, air entrainers, thickeners, water reducing agents, fillers and the like can be used in combination. By using these admixtures together, in the production of the product of the present invention,
In the process of molding by applying vibration and compression force with a predetermined form,
A more preferable molded product can be obtained.

(3) Asphalt Emulsion Asphalt emulsions are classified into cationic type, anionic type, nonionic type, etc. according to the type of surfactant used as an emulsifier. The asphalt emulsions used in the present invention are modified asphalt. Any type of emulsion can be used.

The cationic, anionic and nonionic modified asphalt emulsions used include one or more petroleum asphalts such as natural asphalt, straight asphalt, blown asphalt, semi-blown asphalt and solvent deasphalted asphalt. In addition, modified asphalt modified by a premix type method in which one or more selected from rubber and thermoplastic high molecular weight polymer is mixed is added to water by using an emulsifier, a dispersant, a stabilizer, and the like. An oil-in-water type asphalt emulsion that is emulsified and dispersed, and uses a modified asphalt emulsion that is well mixed with aggregate and cement, or one selected from rubber and a thermoplastic polymer. Or a post-mix type in which two or more types are directly mixed with an oil-in-water type asphalt emulsion. Using the modified asphalt emulsion, which was modified in a way that depends.

The rubber and the thermoplastic polymer used in the modified asphalt emulsion are, for example, natural rubber, gutta-vircha, cyclized rubber, styrene-butadiene rubber, styrene-isoprene rubber, polyisoprene rubber, butadiene rubber, chloroprene rubber, butyl rubber. , Halogenated butyl rubber, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene propylene rubber, EPT rubber, alfin rubber, styrene-butadiene rubber,
It is a rubber such as styrene / isoprene block polymerized rubber, and a thermoplastic polymer such as ethylene / vinyl acetate copolymer and ethylene / acrylate copolymer.
These 1 type (s) or 2 or more types are used.

Further, the rubber or thermoplastic polymer has various shapes and forms. For example,
Examples include powdery ones, granular ones, latex ones, emulsion ones and aqueous ones. These latex-like, emulsion-like and water-like ones are used for the modified asphalt emulsion by the post-mix type method. Of course, they are also used in modified asphalt emulsions by the premix type method.

In addition to the above rubber and thermoplastic polymer, in order to improve adhesiveness and compatibility, a thermoplastic solid resin or solid rubber, a liquid resin, a softening agent as a tackifier,
It is also possible to add a plasticizer or the like. For example, rosin and its derivatives, terpene resins and petroleum resins and their derivatives, alkyd resins, alkylphenol resins, terpene phenol resins, coumarone indene resins, synthetic terpene resins, alkylene resins, polyisobutylene, polybutadiene, polybudin, isobutylene and butadiene Polymers, mineral oils, process oils, pine oils, anthracene oils, pine oils, plasticizers, animal and vegetable oils, polymerized oils and the like. Further, an antioxidant, an antioxidant, sulfur and the like can be added. Furthermore, a water-soluble polymer protective colloid such as MC, CMC, HEC, PVA or gelatin can be added for the purpose of adjusting the viscosity of the modified asphalt emulsion.

The compounding ratio of asphalt, rubber and thermoplastic polymer in the modified asphalt emulsion is about 10 to 100 parts by weight, more preferably about 20 to 50 parts by weight, based on 100 parts by weight of asphalt. is there. When the amount of rubber or thermoplastic high molecular weight polymer is less than 10 parts by mass, the modified asphalt emulsion is decomposed and the adhesiveness to the aggregate of the modified asphalt after curing is poor and the grasping power is inferior.
When the amount exceeds the mass part, the cohesive force is too strong, and rather peeling from the aggregate is likely to occur, and it is not economical.

As the asphalt in the modified asphalt emulsion, it is preferable to use one having a penetration of about 40 to 300 in consideration of the characteristics after decomposition and curing.
The evaporation residue (solid) concentration of the modified asphalt emulsion is
Usually, it is about 50 to 70% by mass, but it is preferable that the concentration is as high as possible. If necessary, a reactive water-soluble synthetic resin or emulsified synthetic resin and its curing material may be added to the asphalt emulsion as a modified asphalt emulsion.

The amount of the modified asphalt emulsion used is 10
It is usually 1 to 25 parts by mass, more preferably about 3 to 15 parts by mass, relative to 0 parts by mass. If the amount of the modified asphalt used is less than 1 part by mass, the coating thickness of the modified asphalt emulsion on the aggregate will be insufficient and excellent performance as a water-permeable concrete product will not be exhibited, resulting in reduced durability. On the other hand, when it exceeds 25 parts by mass, the porosity of the water-permeable concrete product is lowered, and the original water-permeable function as the water-permeable concrete product is not achieved, which is not preferable.

(4) Production method The water-permeable concrete product using the cement and the asphalt emulsion according to the present invention as a binder can be produced by using a mixer and a molding machine similar to those of known concrete products. That is, after mixing the water-permeable polymer cement concrete with a biaxial pug mill mixer or the like, the mixture is driven into a predetermined mold to secure a predetermined porosity while applying a vibration and a compressive force, and then molded into a predetermined shape, followed by demolding. Then
After that, the permeable concrete molding is cured at a temperature of 5 to 80 ° C for a certain period of time. Further, it is also possible to use a mold made of a perforated plate, a dehydrated woven fabric or a dehydrated non-woven fabric as the mold used at the time of molding.

The normal curing is a natural curing at room temperature. If ultra-rapid cement is used, the natural curing period can be one day. In addition, if the setting time is controlled with a cement-type coagulation modifier, immediate demolding is possible. Further, a mixture obtained by laminating two or more layers using the same mixture having different particle sizes and porosities, molding, and then removing from the mold may be similarly cured. Table 1 shows an example of a combination of typical materials of such a water-permeable concrete product.

[0027]

[Table 1]

The large particle size type is suitable for those having a porosity of about 20 to 30%. At that time, it is desirable that the thickness of the concrete product is 5 cm or more. The medium particle size type is suitable for those having a porosity of about 15 to 25%. At that time, it is desirable that the concrete product has a thickness of 4 cm or more. The small particle size type is suitable for those having a porosity of about 10 to 20%. At that time, the concrete product has a thickness of 2
It is possible to manufacture thin-layer products of about 3 cm.

[0029]

[Example 1]

1. Objective The selection of compounding conditions for small particle size type and the confirmation of moldability and physical properties were performed. 2. Material used (1) Aggregate Waste porcelain Dry aggregate 3-5 mm (Surface dry density: 2.30 g / c
m ³ ) Converter slag pre-coated aggregate 2.5-5 mm (surface dry density:
3.67 g / cm ³ ) (converter slag aggregate 2.5-5 mm in a heating asphalt plant, using a high-viscosity binder for heating and drainage asphalt pavement (trade name: Chiroflex (commercially available from Obayashi Road Co., Ltd.)), (2) Cement: Porous Fine (commercially available from Sumitomo Osaka Cement Co., Ltd.) Table 2 shows the standard values of porous fine.

[0030]

[Table 2]

(3) Asphalt emulsion Porous sol (high-concentration modified asphalt emulsion: commercial product manufactured by Nichireki Co., Ltd.) Table 3 shows the standard values of the porous sol.

[0032]

[Table 3]

3. Compounding conditions

[0034]

[Table 4]

4. Test conditions (1) Specimen preparation temperature: 20 ° C (2) Mixing: Hand kneading (3) Specimen: Marshall specimen (φ101.6 × 63.5m
m) (4) Molding method: pressure molding (50 with Marshall compaction device)
(Collapse compaction) (5) Test items

Marshall Stability Test [Compliant with the Japan Road Association's Pavement Test Manual] 1) Curing temperature: 20 ° C 2) Test material age: 1d 3) Testing temperature: 60 ° C 4) Test items: Density, Marshall Stability Stability Test [Complies with the Japan Road Association's Pavement Test Manual Supplement] 1) Curing temperature: 20 ℃ 2) Test material age: 1w Permeability test 1) Constant water level method: [(Company) Japan Road Association pavement Test method handbook] Wheel tracking test [edited by Japan Road Association]
Pavement test method manual] 1) Curing temperature: 20 ° C 2) Test condition (i) Test material age: 1d (ii) Test temperature: 60 ° C 3) Test item: Dynamic stability

5. Test results Test results are shown in Table 5. The physical properties satisfied the standard values shown in the drainage pavement technical guideline (draft) edited by the Japan Road Association. It has sufficient properties as a water-permeable concrete product for heavy traffic roads.

[0038]

[Table 5]

[Example 2] 1. The selection of compounding conditions for the target medium particle size type and the confirmation of moldability and physical property values were performed. 2. Materials used (1) Coarse aggregate: converter slag pre-coated aggregate 5-13 mm (surface dry density: 3.77 g / cm ³ ) (converter slag aggregate 2.5-5 mm in a heated asphalt plant for heating drainage asphalt pavement High viscosity binder (Product name: Chiroflex (commercially available from Obayashi Road Co., Ltd.))
Pre-coated with a mass ratio of 1.2% to the aggregate. ) (2) Fine aggregate: Granulated slag dry aggregate 5 mm or less (surface dry density: 2.70 g / cm ³ ) (3) Cement: Porous Fine (commercially available product of Sumitomo Osaka Cement Co., Ltd.) (4) Asphalt emulsion: Porous Zor (commercially available product from Nichireki)

3. Combination

[0041]

[Table 6]

4. Test conditions (1) Specimen preparation temperature: 20 ° C (2) Mixing: Hand kneading (3) Specimen: Marshall specimen (φ101.6 × 63.5m
m) (4) Molding method: pressure molding (50 with Marshall compaction device)
(Collapse compaction) (5) Test items

Marshall stability test 1) Curing temperature: 20 ℃ 2) Age of test material: 1d 3) Test temperature: 60 ℃ 4) Test items: Density, Marshall stability Cantablo test 1) Curing temperature: 20 ℃ 2) Age of test material: 1w Water permeability test 1) Constant water level method: Pavement test method handbook compliance Wheel tracking test 1) Curing temperature: 20 ℃ 2) Test conditions (I) Age of test material: 1d (Ii) Test temperature: 60 ° C 3) Test item: Dynamic stability

5. Test Results Test results are shown in Table 7. The physical property values satisfied the standard values shown in the drainage pavement technical guideline (draft). Therefore, it has sufficient properties as a permeable concrete product for heavy traffic roads.

[0045]

[Table 7]

[0046]

As described above, according to the present invention, claim 1
The water-permeable concrete product for pavement according to the above can provide a water-permeable concrete product for paving that can be applied to heavy traffic roads, by using a cement molded product binder as a composite material of cement and asphalt emulsion. By constructing a water-permeable or drainage pavement using this water-permeable concrete product for pavement, the safety of vehicle running in rainy weather, which is generally expected as a water-permeable / drainage pavement, is improved, and Noise can be reduced and the effect of suppressing the heat island phenomenon can be expected. In addition, by using water-permeable concrete products for water-permeable and drainage pavements, various pavement designs can be made by arranging concrete products.
It has excellent scenery and is easy to repair.

Further, the water-permeable concrete product for pavement according to claim 2 has cement 1 to 2 with respect to 100 parts by mass of aggregate.
By molding a composition consisting of 5 parts by mass and 1 to 25 parts by mass of asphalt emulsion into a predetermined shape, and then curing and curing the composition, a water-permeable concrete product for pavement applicable to heavy traffic roads can be realized. The water-permeable concrete product for pavement according to claim 3 uses by-products such as steel slag, waste porcelain, waste glass, waste plastic, and sewage sludge molten slag as an aggregate, thereby effectively utilizing the by-products. You can measure.

The method for producing a water-permeable concrete product for pavement according to claim 4 is as follows. 1 to 25 parts by mass of cement and 1 to 25 parts by mass of asphalt emulsion are added to 100 parts by mass of aggregate as required. The admixture for cement is mixed, and by applying vibration and compressive force to it with a predetermined mold, the molded product that has been demolded after molding is cured at a temperature of 5 to 80 ° C. Applicable water-permeable concrete products for pavement can be realized, and as water-permeable concrete products for pavement, products of various shapes can be provided depending on the traffic volume.

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) C04B 24/36 C04B 24/36 28/02 ZAB 28/02 ZAB (71) Applicant 000002118 Sumitomo Metal Industries, Ltd. Osaka, Osaka 4-53-3 Kitahama, Chuo-ku, Tokyo (71) Applicant 000233653 Nichireki Co., Ltd. 4-33-9 Kudankita, Chiyoda-ku, Tokyo (72) Inventor Seiji Kawashima 6-8, 6-cho, Chiyoda-ku, Tokyo Sumitomo Osaka Cement Co., Ltd. (72) Inventor Yutaka Ando 6-6, Rokubancho, Chiyoda-ku, Tokyo 28 Sumitomo Osaka Cement Co., Ltd. (72) Inventor Kenichi Anku 28-6, Rokubancho, Chiyoda-ku, Tokyo 28 Sumitomo Osaka Cement Co., Ltd. (72) Inventor Hajime Tanahashi 1518 Majima, Fukuju-cho, Hashima-shi, Gifu Prefecture Maruei Concrete Industry Co., Ltd. (72) Inventor Toshiya Sugimoto 1518 Majima, Fukuju-cho, Hashima City, Gifu Prefecture Maruei Concrete Industry Co., Ltd. (72) Inventor Yasunori Kagawa 2 Tsurigane-cho, Chuo-ku, Osaka-shi, Osaka Chome 4-17 Obayashi Road Co., Ltd. Osaka Branch (72) Inventor Mako Ariga 5-16 Tanaka-cho, Toyota City, Aichi Prefecture Obayashi Road Co., Ltd. Chubu Branch Aichi Kita Office Toyota Sales Office (72) Inventor Takuji Hamasaki Wakayama Prefecture 1850 Minato Minato, Wakayama Sumitomo Metal Industries Co., Ltd. Wakayama Works (72) Inventor Osamu Watase Wakoyama, Wakayama 1850 Minato Sumitomo Metal Works Co., Ltd. (72) Inventor Ryo Ito Kokubuncho, Shimotsuga-gun, Tochigi Prefecture 4-16-19 Higashi, Teramachi Station (72) Inventor Katsutoshi Sato 2-7-8 Satsuki, Utsunomiya City, Tochigi Prefecture (72) Inventor Yu Yamada 6-6 Narita Nishimachi, Neyagawa City, Osaka 2D051 AA02 AA03 AA06 AD07 AD08 AE01 AF05 AF06 AF07 AG01 AG03 AG11 AH02 DA04 DC09 4G012 PA28 PA29 PA30 PA32 PB38 PE04 PE07

Claims (4)

[Claims] 1. A paving concrete product formed by molding a concrete into a predetermined shape, wherein the binder of the concrete molding is a composite of cement and asphalt emulsion. Sex concrete products. 2. Cement 1 to 25 per 100 parts by mass of aggregate
A water-permeable concrete product for pavement, which is obtained by molding a composition comprising 1 part by mass to 25 parts by mass of an asphalt emulsion into a predetermined shape, followed by curing and curing. 3. The water-permeable concrete for pavement according to claim 1, wherein by-products such as steel slag, waste porcelain, waste glass, waste plastic, and sewage sludge molten slag are used as aggregates. Product. 4. Cement 1 to 25 per 100 parts by mass of aggregate
5 to 80 parts by weight of asphalt emulsion, 1 to 25 parts by weight of admixture, and optionally an admixture for cement are mixed, and vibration and compressive force are applied in a predetermined mold to remove the molded product after molding. A method for producing a water-permeable concrete product for pavement, which comprises curing at a temperature of ℃.