JP3312641B2 - One-powder type polymer cement composition for semi-flexible pavement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a one-powder type polymer cement composition used for semi-flexible pavement of roads.

[0002]

2. Description of the Related Art Semi-flexible pavement, also called semi-rigid pavement, is a pavement having both the flexibility of asphalt pavement and the rigidity of concrete pavement. This semi-flexible pavement requires fluid resistance, oil resistance, heat resistance, light color, etc.For example, intersections of roads where vehicles are frequently braked, stopped, started, bus stops, highways Toll booth,
Used for gas stations. The construction of the semi-flexible pavement is performed by paving an open asphalt mixture having a large porosity of about 20 to 27% as a base material, and then infiltrating cement milk for infiltration into the open asphalt mixture as grout. The curing time until the opening of traffic after infiltration is about 3 days when using ordinary Portland cement as cement, and about 1 day when using early-strength Portland cement. It takes about 3 hours in the case of using a material to which a hardener is added.

[0003] This cement milk for infiltration is prepared by mixing a water-based resin emulsion or a mixture of rubber latex and water in advance at a construction site, adding a powder of cement, silica sand, or the like, and kneading the mixture uniformly with a mixer. Is done. In order to prepare the cement milk for infiltration, it takes time to mix several or more types of materials, and if the operator is unskilled, there is a possibility that mixing errors may occur. Also, disposal of waste cans after use of the resin emulsion is a problem. Conventionally, in order to improve this point, a material containing 15 to 70 parts by weight of fly ash, 10 to 60 parts by weight of silica sand, and 0.5 to 10 parts by weight of re-emulsifiable powder resin with respect to 100 parts by weight of cement. A one-powder type polymer cement composition for semi-flexible pavement which has been mixed and adjusted has been proposed (JP-A-3-295905). According to this one-powder type polymer cement composition for semi-flexible pavement,
In addition to eliminating the risk of compounding errors when preparing cement milk for infiltration at the construction site, the cement milk for infiltration can be converted to mortar when quick-hardening cement is used for urgent road repair work that needs to be completed in a short time. Adverse effects on construction such as solidification in a mixer, injection hose or the like can be minimized.

[0004]

However, the one-powder type polymer cement composition for semi-flexible pavement having the above constitution does not have sufficiently high fluidity required as cement milk for infiltration.
For this reason, in order to obtain a desired flow value, the ratio of the water powder is made relatively large, and as a result, there is a problem that drying shrinkage becomes large, cracks are generated, and strength development is poor.

[0005] An object of the present invention is to provide a compound which can be quickly prepared on a construction site and has an adverse effect on the construction of cement milk for infiltration even when using ordinary or early-strength Portland cement in which cement is added with ultra-rapid hardening cement or rapidly hardening material. It is an object of the present invention to provide a one-powder type polymer cement composition for semi-flexible pavement capable of minimizing the water content. It is another object of the present invention to provide a one-powder type polymer cement composition for semi-flexible pavement, which does not cause a mixing mistake by an operator.

Another object of the present invention is to provide a semi-deflection which is excellent in fluidity of a cement milk for infiltration, can reduce drying powder shrinkage by lowering a water powder ratio, suppresses generation of cracks, and is excellent in strength development. It is an object of the present invention to provide a one-powder type polymer cement composition for pavement. Still another object of the present invention is to provide a one-powder type polymer cement composition for semi-flexible pavement having good coloring properties when the cement milk for infiltration is whitened and colored.

[0007]

The invention according to claim 1 is
A one-powder type polymer cement composition for semi-flexible pavement prepared by uniformly mixing cement, limestone fine powder, silica sand, re-emulsifiable powder resin and powder additives , wherein the cement
5 to 100 weights of the above limestone fine powder for 100 parts by weight
Parts by weight, 6 to 300 parts by weight of the silica sand, and the re-emulsifiable powder
Characterized by containing 2 to 46 parts by weight of body resin
You . By using the limestone fine powder, the fluidity is improved, the water powder ratio for obtaining a desired flow value can be reduced, and as a result, drying shrinkage can be reduced and generation of cracks can be suppressed. In addition, when the cement milk for infiltration is whitened and colored, the color developability is improved.

[0008] A second aspect of the present invention is a semi-flexible pavement powder prepared by uniformly mixing cement, limestone fine powder, limestone aggregate, silica sand, re-emulsifiable powder resin and powder additives. -Type polymer cement composition , wherein said cement 10
5 to 100 parts by weight of the limestone fine powder based on 0 parts by weight
And 3 to 200 parts by weight of the limestone aggregate and 3 to 20 quartz sand
0 parts by weight and 2 to 46 parts by weight of the re-emulsifiable powder resin
It is characterized by including . By using limestone aggregate, the flowability is improved and the strength expression is enhanced.

The invention according to claim 3 is a one-powder type polymer cement for semi-flexible pavement prepared by uniformly mixing cement, fly ash, limestone aggregate, re-emulsifiable powder resin and powder additive. A composition comprising 100 weights of the cement.
5 to 100 parts by weight of the above fly ash with respect to parts by weight
6 to 300 parts by weight of the limestone aggregate and the re-emulsifiability
Characterized by containing 2 to 46 parts by weight of powder resin
You . By using fly ash and limestone aggregate together, the flowability is improved and the strength development is enhanced.

[0010] The invention according to claim 4 is a one-powder type polymer cement composition for semi-flexible pavement prepared by uniformly mixing cement, blast furnace slag, silica sand, re-emulsifiable powder resin and powder additives. And 100 parts by weight of the cement
And 5 to 100 parts by weight of the blast furnace slag and 6 to
300 parts by weight and 2 to 46 parts by weight of the re-emulsifiable powder resin
, Respectively . By using the blast furnace slag, when the cement milk for infiltration is whitened and colored, the coloring property is good.

[0011] The invention according to claim 5, cement and limestone powder and silica sand powder asphalt and slaked lime and the powder additive is semi flexible paving one powdered polymer cement compositions prepared by uniformly mixing There, 100 cement
5 to 100 parts by weight of the limestone fine powder,
6 to 300 parts by weight of the silica sand and the powder asphalt 2
To 46 parts by weight and 0.01 to 5 parts by weight of the slaked lime
It is characterized by including each . By using powder asphalt and slaked lime, good grout properties can be obtained without using a re-emulsifiable powder resin.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

The preferred content of the fine limestone powder is 20 to 60 parts by weight in claims 1, 2 and 5. The preferred content of silica sand is 13 to 50 parts by weight only in the case of claim 2, and 26 to 1 in the case of other claims 1, 4 and 5.
00 parts by weight. The preferred content of the limestone aggregate is 13 to 50 parts by weight in the case of claim 2, and 26 to in the case of claim 3.
100 parts by weight. The preferred content of the re-emulsifiable powder resin is 1.5 to 15 parts by weight in claims 1 to 4. The preferred content of fly ash of claim 3 is 20
６０60 parts by weight. The preferred content of the blast furnace slag of claim 4 is 20 to 60 parts by weight. The preferred contents of the powdered asphalt and the slaked lime of claim 5 are 1.5 and 1.5 respectively.
To 15 parts by weight and 0.05 to 1.0 parts by weight.

If the limestone fine powder is less than the above lower limit, not only good flow properties are not obtained, but also the cement milk for infiltration is not whitened, and if it exceeds the above upper limit, there occurs a problem that strength developability is reduced. If the silica sand is less than the above lower limit, the desired fluidity cannot be obtained, and if it exceeds the above upper limit, there occurs a problem that strength developability is reduced. If the limestone aggregate is less than the above lower limit, the properties are not improved, and if it exceeds the above upper limit, there occurs a problem that the strength development is reduced. If the re-emulsifiable powder resin is less than the above lower limit, cracks are liable to occur, and if it exceeds the above upper limit, there occurs a problem that strength developability is reduced. If the fly ash is less than the above lower limit, the fluidity is not improved, and if it exceeds the above upper limit, there is a problem that the strength developability is reduced. If the blast furnace slag is less than the above lower limit, the cement milk for infiltration will not be whitened, and if the blast furnace slag exceeds the above upper limit, there is a problem in that the strength developability is reduced. If the powdered asphalt is less than the above lower limit, the resistance to cracking is insufficient, and if the powdered asphalt exceeds the above upper limit, there occurs a problem that the strength developability is reduced. If the amount of slaked lime is less than the above lower limit, the effect of correcting a sufficient curing delay cannot be obtained, and if it exceeds the above upper limit, premature curing will occur, causing a problem that good fluidity cannot be obtained.

Each material will be described in detail through the polymer cement compositions according to claims 1 to 5. As the cement of the present invention, normal Portland cement, early-strength Portland cement, mixed cement, and ultra-rapid hardening cement are used according to the curing time required to open the traffic.
These may be used in combination. A rapid hardening material may be added to ordinary or early-strength Portland cement to be used as an ultra-fast setting cement. In the case of using ultra-rapid hardening cement, the injection operation can be ensured by using a setting modifier such as oxycarboxylic acid or a salt thereof, an alkali metal salt, an aluminate or a sulfate. For ultra-rapid hardening cement, 20 to 70 parts by weight of Portland cement or mixed cement
II-type anhydrous gypsum 10-30 parts by weight, steelmaking slag 20-50 parts by weight and setting retarder 0.5-5 based on the total weight of these components
A mixture of the fine powder mixture and Portland cement or mixed cement in the above ratio was added to the mixture by adding the above parts by weight to obtain a specific surface area of 3500 cm ² / g.
10-70 parts by weight of stainless steel slag by-produced by the use of aluminum in the deoxidation step of stainless steel refining in 100 parts by weight of Portland cement or mixed cement described in JP-A-260749, and II-type anhydrous gypsum After mixing 4 to 40 parts by weight with 0.5 to 5 parts by weight of an organic setting retarder such as tartaric acid and a setting modifier consisting of an alkali carbonate such as sodium carbonate, the mixture is pulverized (Japanese Patent Laid-Open No. No. 6-321607) or a commercially available calcium aluminate-based quick-setting material can be used.

As the silica sand of the present invention, any of foundry sand, sea sand, river sand and mountain sand may be used. A relatively fine silica sand of about No. 7 is preferable. Examples of the re-emulsifiable powder resin of the present invention include a commercially available vinyl acetate resin powder. For example, resin powders of ethylene vinyl acetate resin, carboxylic acid-modified vinyl acetate resin, veova-modified vinyl acetate resin, acetic acid acrylate copolymer, pure acrylic resin, and the like can be given. Blaine value (specific surface area) for limestone fine powder and blast furnace slag
1000-6000 cm ² / g, preferably 2000
粉体 4500 cm ² / g of powder is used. Limestone aggregate is
Particle size is 0.01 to 1.0 mm, preferably 0.05 to
Use a 0.6 mm one. Powdered asphalt having an average particle size of 20 to 60 μm, preferably 30 to 50 μm is used. Further, slaked lime having a particle size of 0.1 mm or less, preferably 0.05 mm or less is used.

The powder additives of the present invention include water reducing agents, defoamers, and thickeners. Through the polymer cement compositions according to claims 1 to 5, these compositions are added with a water reducing agent in an amount of 0.1 to 100 parts by weight of cement.
10 parts by weight, 0.01 to 2 parts by weight of an antifoaming agent, and 0.01 to 3.0 parts by weight of a thickener. If the lower limit is less than the desired value, the desired performance is not exhibited.If the upper limit is exceeded, the water reducing agent causes a delay in curing of material separation, and the antifoaming agent causes a retardation in curing, and a thickener. In such a case, curing may be delayed and fluidity may be reduced. As a water reducing agent,
Lignin sulfonate, oxyorganic acid salt, β-naphthalene sulfonate, polycarboxylate, melamine resin sulfonate, creosote oil sulfonate condensate and the like. Examples of the antifoaming agent include ethers, fatty acid esters, fatty acid amides, higher alcohols, highly polymerized glycols, and silicones. Among them, nonionic or silicone is preferred. Examples of the thickener include cellulose derivatives such as hydroxyethylcellulose, methylcellulose, and hydroxymethylcellulose.

In order to prepare the one-powder type polymer cement composition of the present invention, each material is dry-mixed by a usual powder mixing apparatus such as a V-type mixer, a vertical mixer, a universal mixer or the like. In addition, the semi-flexible pavement using the one-powder type polymer cement composition of the present invention is formed by paving an open-grain asphalt mixture as a base material, and then applying the one-powder type polymer cement composition 1
20 to 60 parts by weight of water, preferably 25 to 50 parts by weight, is mixed with 00 parts by weight using a mobile mixer or the like to prepare cement milk for penetration (grout). After the paved open-grain asphalt mixture has a temperature of 50 ° C. or less, the cement milk for infiltration (grout) is sprayed, spread with a rubber lake, and penetrated into the open-grain asphalt mixture with a vibrating roller.

[0019]

Next, examples of the present invention will be described together with comparative examples. <Example 1> 35 parts by weight of a fine limestone powder having a Blaine value of 3000 cm ² / g and 40 parts by weight of silica sand No. 7 were collected in a container of a universal mixer with respect to 100 parts by weight of ordinary Portland cement. Attach and first agitate at low speed for 10 minutes. Subsequently, in this container, 4 parts by weight of an acrylic copolymer resin powder as a re-emulsifiable powder resin and a high-performance water reducing agent (melamine resin sulfonic acid condensate salt) as a powder additive were added.
9 parts by weight, 0.1 part by weight of a powder antifoaming agent (nonionic) and 0.02 part by weight of a thickener (hydroxyethylcellulose) were mixed at a high stirring speed for 20 minutes, and then semi-flexible. A one-powder type polymer cement composition for paving was prepared and placed in a closed container.

Example 2 Instead of collecting 40 parts by weight of silica sand No. 7, 20 pieces of limestone aggregate having an average particle size of 0.3 mm were used.
A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Example 1 except that 20 parts by weight of Silica Sand No. 7 and 20 parts by weight of Silica Sand No. 7 were collected and placed in a closed container. <Example 3> Instead of collecting 35 parts by weight of limestone fine powder, 35 parts by weight of fly ash and 4 parts of silica sand 7
Instead of collecting 0 parts by weight, a one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Example 1 except that 40 parts by weight of limestone aggregate pulverized to 0.3 mm or less was collected respectively. This was placed in a closed container.

<Example 4> For semi-flexible pavement in the same manner as in Example 1 except that 35 parts by weight of blast furnace slag having a Blaine value of 3000 cm ² / g was collected instead of collecting 35 parts by weight of limestone fine powder. A one-powder type polymer cement composition was prepared and placed in a closed container. <Comparative Example 1> A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Example 1 except that 35 parts by weight of fly ash was collected instead of collecting 35 parts by weight of limestone fine powder, This was placed in a closed container. <Comparative Example 2> 29 parts by weight of silica sand No. 7 was used in Example 1 with respect to 100 parts by weight of the same ordinary Portland cement as in Example 1.
After stirring and collecting in a container in the same manner as described above, 3 parts by weight of an acrylic copolymer resin powder as a re-emulsifiable powder resin and 0.5 of the same water reducing agent as in Example 1 were added as a powder additive. Part by weight and 0.1 part by weight of an antifoaming agent were added, and the mixture was stirred and mixed for 20 minutes at a high stirring speed to prepare a one-powder type polymer cement composition for semi-flexible pavement, which was placed in a closed container.

Example 5 Instead of collecting 4 parts by weight of the re-emulsifiable powder resin, 4 parts by weight of powder asphalt having an average particle diameter of 41 μm was collected, and the thickener was added from 0.02 part by weight to 0.1 part by weight. A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Example 1 except that the amount was increased to 04 parts by weight and 0.3 part by weight of slaked lime was further added, and this was placed in a closed container.

<Comparative Example 3> A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Example 5 except that slaked lime was not added at all, and placed in a closed container. <Comparative Example 4> A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Example 5 except that the amount of the thickener was changed to 0.02 parts by weight, and this was placed in a closed container. Was. Table 1 shows the contents of Examples 1 to 5 and Comparative Examples 1 to 4.

[0024]

[Table 1]

<Kneading of grout> 100 parts by weight of the one-powder type polymer cement composition for semi-flexible pavement of Examples 1 to 5 and Comparative Examples 1, 3, and 4 were each added to 45 parts by weight of water. 100 parts by weight of the one-powder type polymer cement composition for semi-flexible pavement No. 2 was added to 50 parts by weight of water, and each was uniformly mixed with a mixer to prepare nine types of cement milk for penetration (grout).

<Physical Properties of Grout and Specimen> (a) Fluidity (flow) test Standards of the Japan Society of Civil Engineers “Method for testing fluidity of mortar for injection of prepacked concrete (method using P funnel) (JSCE-
F521-1994) ". That is, the grout immediately after kneading obtained from the one-powder type polymer cement compositions of Examples 1 to 5 and Comparative Examples 1 to 4 and the grout after elapse of 20 minutes after kneading were placed in a funnel vertically supported. , And the flow value of each was determined, and its liquidity was evaluated. Table 2 shows the results. (b) Separation state of resin etc. About Examples 1, 5 and Comparative Examples 3 and 4, the grout immediately after kneading was put into a beaker, and after 180 minutes, the situation where the re-emulsifiable powder resin and the powder asphalt separated from the grout. Observed visually. Table 2 shows the results.

(C) Strength Test and Measurement of Drying Shrinkage “Physical test method of cement (JIS R 5201-19)
92)). That is, from the grout immediately after kneading obtained from the one-powder type polymer cement compositions of Examples 1 to 5 and Comparative Examples 1 to 4, square pillars having a cross section of 40 mm and a length of 160 mm were prepared. When the age of the specimens was 24 hours, 3 days, 7 days, and 28 days, three specimens of each specimen were measured for bending strength and compressive strength. For Examples 1 to 4 and Comparative Examples 1 and 2, the mortar and concrete length change test method (JIS A 1129-
According to 1993), the drying shrinkage was determined from the dimensional change from the start of drying when the drying period of the specimen was 4 weeks. Table 2 shows the average value.

[0028]

[Table 2]

The following was found from Table 2. In Example 1 in which part of the cement in Comparative Example 2 was replaced with limestone fine powder, the fluidity was improved as compared with Comparative Example 2, and the water powder ratio for obtaining a desired flow was reduced from 50% to 45%. The drying shrinkage could be reduced. Further, since the color of the grout became white, the coloring was improved when colored. In Example 2 in which half of Silica Sand No. 7 in Example 1 was replaced with limestone aggregate, the flow and strength development were slightly improved as compared with Example 1. In Example 3 in which fly ash was used in which all of the silica sand in Comparative Example 1 was replaced with limestone aggregate, the flow and initial strength were slightly improved as compared with Comparative Example 1.

In Example 4 in which blast furnace slag was used instead of fly ash in Comparative Example 1, the material age was 2 compared to Comparative Example 1.
The strength on the 8th improved slightly. In Comparative Example 4 in which the ratio of the thickener was small, the powdered asphalt having a low specific gravity floated on the grout surface, so that separation of the resin and the like was observed, and the curing was delayed. On the other hand, in Example 5 in which the amount of the thickener was increased and slaked lime was added, no separation of the resin and the like was observed, and the same strength development as in Example 1 was exhibited.

[0031]

As described above, according to the present invention, it is possible to mix quickly at the construction site, and even when using ordinary or early-strength Portland cement in which cement is added with ultra-rapid hardening cement or rapidly hardening material, Adverse effects on the construction of cement milk can be minimized. Also, even if the worker is immature, there is no possibility of mis-mixing. Further, it is excellent in fluidity, can reduce drying shrinkage by lowering the water powder ratio, and is excellent in strength development. Further, since the cement milk for infiltration is whitened, the coloring property is improved when colored.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI C04B 24:26 C04B 24:26 D 14:28) 14:28) 111: 50 111: 50 (56) References −295905 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C04B 14/00-28/36

Claims (5)

(57) [Claims] In 1. A cement and limestone powder and silica sand and re-emulsifiable resin powder and the powder additive is semi flexible paving one powdered polymer cement compositions prepared by uniformly mixing at a predetermined ratio And the limestone fine powder with respect to 100 parts by weight of the cement.
5 to 100 parts by weight, 6 to 300 parts by weight of the silica sand,
Containing 2 to 46 parts by weight of the re-emulsifiable powder resin
-Powder type polymer cement for semi-flexible pavement, characterized by
Composition. 2. A single-powder polymer for semi-flexible pavement prepared by uniformly mixing cement, limestone fine powder, limestone aggregate, silica sand, re-emulsifiable powder resin, and powder additives in a predetermined ratio. A cement composition , wherein the limestone fine powder is contained with respect to 100 parts by weight of the cement.
5 to 100 parts by weight, and 3 to 200 parts by weight of the limestone aggregate
And 3 to 200 parts by weight of silica sand and 2 to 4 re-emulsifiable powder resin
Semi-flexible pavement, each containing 6 parts by weight
A one-powder type polymer cement composition for wearing. 3. A one-powder type polymer cement composition for semi-flexible pavement prepared by uniformly mixing a predetermined ratio of cement, fly ash, limestone aggregate, re-emulsifiable powder resin and powder additive. a is, with respect to the cement 100 parts by weight, the fly ASSY
5 to 100 parts by weight, and 6 to 300 parts by weight of the limestone aggregate
Parts and 2 to 46 parts by weight of the re-emulsifiable powder resin
One-powder polymer for semi-flexible pavement characterized by containing
Cement composition . Met wherein cement and blast furnace slag and silica sand and re-emulsifiable resin powder and the powder additive is semi flexible paving one powdered polymer cement composition was prepared by uniformly mixing at a predetermined ratio And the blast furnace slag 5 per 100 parts by weight of the cement
-100 parts by weight, 6-300 parts by weight of the silica sand,
Containing 2 to 46 parts by weight of the re-emulsifiable powder resin.
Characteristic One-powder type polymer cement group for semi-flexible pavement
Adult . 5. A cement and limestone powder and silica sand powder asphalt and slaked lime and the powder additive is semi flexible one powdery polymer cement composition for paving which is prepared by uniformly mixing at a predetermined ratio , With respect to 100 parts by weight of the cement, the limestone fine powder
5 to 100 parts by weight, 6 to 300 parts by weight of the silica sand,
2 to 46 parts by weight of the powder asphalt and 0.
Characterized in that each contains 0.01 to 5 parts by weight.
One-powder type polymer cement composition for wet pavement .