JP3341812B2 - 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. This cement milk for infiltration is added to a powder of cement, silica sand or the like while stirring a mixed solution of water-based resin emulsion or rubber latex and water at a construction site in advance, and uniformly kneaded by a mixer.

[0003]

In the above-mentioned construction method, not only takes time to prepare several or more kinds of materials to prepare the cement milk for infiltration, but also if there is immature workers, there is a possibility that mixing errors may occur. there were. In addition, when preparing the cement milk for infiltration, the powder is liable to generate dust, resulting in deterioration of the working environment. On the other hand, if the composition for cement milk is mixed in advance, the setting time of the cement milk is delayed when stored for a long period of time, and there is a problem that the curing time until the opening of traffic after infiltration is extended.

[0004] It is an object of the present invention to provide a one-powder type semi-flexible polymer cement composition for pavement which can be quickly compounded on the construction site and minimizes the adverse effect on the construction of the cement milk for infiltration. It is in. 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 one-powder type semi-flexible polymer cement composition for pavement, which prevents scattering of dust and improves working environment when preparing cement milk for infiltration. Still another object of the present invention is to provide a semi-flexible one-powder type polymer cement composition for pavement which can withstand long-term storage without changing the setting time of cement milk.

[0005]

The invention according to claim 1 is
A composition prepared by uniformly mixing cement, limestone fine powder, silica sand, re-emulsifiable powder resin, smectite-type clay mineral and powder additive at a predetermined ratio, and further comprising diethylene glycol in this composition. It is a one-powder type polymer cement composition for semi-flexible pavement, which is mixed at 0.05 to 0.5% by weight. By using limestone fine powder, the fluidity of the cement milk for infiltration is improved, and the water powder ratio for obtaining a desired flow value can be reduced, and as a result, drying shrinkage is reduced and cracks are suppressed. it can. In addition, by using a smectite-type clay mineral, bleeding of the cement milk for infiltration can be suppressed while maintaining good fluidity. Further, by mixing 0.05 to 0.5% by weight of diethylene glycol, the setting time of cement milk is prevented from being delayed. If the content of diethylene glycol is less than 0.05% by weight, the setting time of the cement milk will be delayed during the storage period, and the amount of 0.1% will be required.
If it exceeds 5% by weight, there is a problem that the cost increases. Preferably it is 0.1 to 0.2% by weight. The reason for determining the mixing ratio of diethylene glycol is the same in the following inventions according to claims 2 to 5.

The invention according to claim 2 is a composition prepared by uniformly mixing cement, limestone fine powder, silica sand, re-emulsifiable powder resin, silica fume and powder additives at a predetermined ratio. A one-powder type polymer cement composition for semi-flexible pavement, characterized in that this composition is further mixed with 0.05 to 0.5% by weight of diethylene glycol.
By using silica fume, occurrence of bleeding is reduced and strength expression is improved while maintaining good fluidity.

According to a third aspect of the present invention, there is provided a composition prepared by uniformly mixing cement, silica sand, a re-emulsifiable powder resin, a shrinkage reducing agent, and a powder additive at a predetermined ratio. A one-powder type polymer cement composition for semi-flexible pavement, wherein the composition further contains 0.05 to 0.5% by weight of diethylene glycol. The invention according to claim 4 is a composition prepared by uniformly mixing cement, limestone fine powder, silica sand, re-emulsifiable powder resin, shrinkage reducing agent, and powder additive at a predetermined ratio, A one-powder type polymer cement composition for semi-flexible pavement, characterized in that the composition further contains 0.05 to 0.5% by weight of diethylene glycol. The invention according to claim 5 is a composition prepared by uniformly mixing cement, fast-hardening material, limestone fine powder, silica sand, re-emulsifiable powder resin, shrinkage reducing agent, and powder additive at a predetermined ratio. A semi-flexible one-powder type polymer cement composition for pavement characterized by further mixing 0.05 to 0.5% by weight of diethylene glycol with this composition. In the invention according to any one of claims 3 to 5,
The use of the shrinkage reducing agent reduces the drying shrinkage of the cement milk for infiltration, thereby suppressing the occurrence of cracks and preventing the scattering of dust during the preparation of the cement milk for infiltration, thereby improving the working environment. By using the fast-hardened material, the curing time until opening of traffic can be reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The polymer cement composition according to claim 1 is 5 to 10 parts by weight based on 100 parts by weight of cement.
0 parts by weight of limestone fine powder, 6 to 300 parts by weight of silica sand, 2 to 46 parts by weight of re-emulsifiable powder resin, 0.5 to 2 parts by weight
Contains 0 parts by weight of smectite-type clay mineral. The polymer cement composition according to claim 2 is characterized in that, based on 100 parts by weight of cement, 5 to 100 parts by weight of limestone fine powder;
It contains 200 parts by weight of silica sand, 2 to 25 parts by weight of a re-emulsifiable powder resin, and 0.5 to 45 parts by weight of silica fume. The polymer cement composition according to claim 3 has 100
5 to 150 parts by weight of silica sand, 1 to 20 parts by weight of re-emulsifiable powder resin,
0 parts by weight of a shrinkage reducing agent. The polymer cement composition according to claim 4, wherein 5 to 100 parts by weight of limestone fine powder, 6 to 300 parts by weight of silica sand, and 2 to 46 parts by weight of re-emulsifiable powder are used for 100 parts by weight of cement. Body resin,
It contains 0.5 to 20 parts by weight of a shrinkage reducing agent. The polymer cement composition according to claim 5, comprising 100 to 100 parts by weight of cement, 10 to 200 parts by weight of a fast-setting material, and 5 to 100 parts by weight.
Parts by weight of limestone fine powder, 10 to 600 parts by weight of silica sand, 1 to 100 parts by weight of re-emulsifiable powder resin,
50 parts by weight of a shrinkage reducing agent.

The preferred content of the fine limestone powder is 20 to 60 parts by weight in the case of claims 1, 2 and 4, and 10 to 40 parts by weight in the case of claim 5. The preferred content of quartz sand is
25 to 100 parts by weight in the case of claims 1, 2 and 4, 20 to 80 parts by weight in the case of claim 3, 50 to 15 parts in the case of claim 5
0 parts by weight. The preferable content of the re-emulsifiable powder resin is 1.5 to 15 parts by weight in claims 1, 2 and 5, 1.0 to 10 parts by weight in claim 3, and 2 to 5 in claim 5.
40 parts by weight. The preferred content of the smectite-type clay mineral of claim 1 is 1 to 10 parts by weight. The preferred content of the silica fume of claim 2 is 1 to 15 parts by weight. The preferable content of the shrinkage reducing agent is as follows.
5 to 5 parts by weight, 1 to 8 parts by weight in the case of claim 4, and 1 to 15 parts by weight in the case of claim 5. The preferred content of the quick-hardening material of claim 5 is 15 to 100 parts by weight.

[0010] If the limestone fine powder is less than the above lower limit, good fluidity cannot be obtained, and if it exceeds the above upper limit, there arises 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 re-emulsifiable powder resin is less than the above lower limit, cracks are liable to occur, and if it exceeds the above upper limit, strength developability is reduced, resulting in uneconomical problems. If the smectite-type clay mineral is less than the above lower limit, a sufficient bleeding suppressing effect cannot be obtained, and if it exceeds the above upper limit, a problem that the fluidity is reduced occurs. If the silica fume is less than the above lower limit, no sufficient effect on strength development can be obtained, and if the silica fume exceeds the above upper limit, the viscosity increases and the fluidity decreases. When the shrinkage reducing agent is less than the above lower limit, the effect is not exhibited, and when the shrinkage reducing agent exceeds the above upper limit, there is a problem that the curing is adversely affected. If the fast-hardened material is less than the lower limit, a sufficient quick-hardening effect cannot be obtained, and if it exceeds the upper limit, premature curing and cost increase will occur.

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 fast-setting 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.

The smectite-type clay mineral of the present invention includes bentonite, montmorillonite, beidellite,
Nontronite, saponite, iron saponite, hectorite, and the like. The quartz sand of the present invention is foundry sand, sea sand,
Either river sand or 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. The limestone fine powder has a Blaine value (specific surface area) of 10
00-6000 cm ² / g, preferably 2000-45
A powder of 00 cm ² / g is used.

The powder additive of the present invention includes a powdery water reducing agent, defoaming agent and thickener. The polymer cement composition according to any one of claims 1 to 5, wherein the composition contains 0.1 to 10 parts by weight of a water reducing agent and 0.01 to 2 parts by weight of a defoaming agent based on 100 parts by weight of cement. Parts and a thickener are contained in an amount of 0.01 to 3.0 parts by weight. Below these lower limits, the desired performance of each does not appear, and when it exceeds the upper limit, in the case of a water reducing agent, material separation and curing delay occur,
In the case of an antifoaming agent, curing delay may occur, and in the case of a thickener, curing delay may occur and fluidity may be reduced.

Lignin sulfonate as a water reducing agent,
Oxyorganic acid salts, β-naphthalene sulfonates, polycarboxylates, melamine resin sulfonates, creosote oil sulfonic acid condensates, and the like. Examples of the powder defoaming 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. Further, as a shrinkage reducing agent, liquid glycol ether, low molecular ethylene oxide, propylene oxide copolymer, polyether,
Examples thereof include alkylene oxide adducts of lower alcohols and the like, and neopentyl glycol in powder form. The diethylene glycol mixed in the first to fifth aspects of the present invention is a kind of dihydric alcohol having an ether bond and is obtained by heating ethylene oxide and ethylene glycol.

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 and 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.

[0016]

Next, examples of the present invention will be described together with comparative examples. <Examples 1 to 3> 35 parts by weight of limestone fine 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, and stirred. Attach the wings and start at 10
Stirred for minutes. Subsequently, 4 parts by weight of an acrylic copolymer resin powder as a re-emulsifiable powder resin, 6 parts by weight of bentonite as a smectite type clay mineral, and a high-performance water reducing agent (melamine resin sulfonic acid condensate salt) as a powder additive. ) 0.9 parts by weight, 0.1 powder defoamer (non-ionic)
Parts by weight and a thickener (hydroxyethyl cellulose) 0.0
2 parts by weight and diethylene glycol are added in a predetermined ratio,
The stirring speed was increased and the mixture was stirred for 20 minutes to prepare a one-powder type polymer cement composition for semi-flexible pavement. Example 1 was a composition in which the mixing ratio of diethylene glycol was 0.05 part by weight, Example 2 was a composition in which 0.1 part by weight was mixed, and Example 3 was a composition in which 0.5 part by weight was mixed.
These were each put 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 Examples 1 to 3 except that no diethylene glycol was added, and this was placed in a closed container as Comparative Example 1. Was. <Comparative Examples 2 and 3> Examples 1 to 3 except that the amount of diethylene glycol was changed to 0.02 parts by weight and 0.7 parts by weight.
In the same manner as in Example 3, a one-powder type polymer cement composition for semi-flexible pavement was prepared. The composition mixed with 0.02 parts by weight was designated as Comparative Example 2, and the composition mixed with 0.7 parts by weight was designated as Comparative Example 3.
These were each put in a closed container.

<Examples 4 to 6> A one-powder type polymer cement composition for semi-flexible pavement in the same manner as in Examples 1 to 3, except that 7 parts by weight of silica fume was collected instead of 6 parts by weight of bentonite. These were placed in closed containers as Examples 4 to 6, respectively. <Comparative Example 4> A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Examples 4 to 6 except that no diethylene glycol was added, and this was placed in a closed container as Comparative Example 4. <Comparative Examples 5 and 6> Examples 4 to 6 were repeated except that the amount of diethylene glycol was changed to 0.02 parts by weight and 0.7 parts by weight.
In the same manner as in Example 6, a one-powder type polymer cement composition for semi-flexible pavement was prepared. The composition mixed with 0.02 parts by weight was designated as Comparative Example 5, and the composition mixed with 0.7 parts by weight was designated as Comparative Example 6.
These were each put in a closed container.

<Examples 7 to 9> 29 parts by weight of silica sand 7
As a shrinkage reducing agent, 2 parts by weight of liquid glycol ether was collected in a container of a universal mixer, and a stirring blade was attached thereto, and the mixture was first stirred at a low speed for 10 minutes. Subsequently, 100 parts by weight of ordinary Portland cement, 3 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 are added to the container.
0.5 parts by weight and diethylene glycol were added at a predetermined ratio, 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.
The composition in which the mixing ratio of diethylene glycol was 0.05 part by weight was used as Example 7, the composition in which 0.1 part by weight was mixed was used in Example 8, and the composition in which 0.5 part by weight was mixed was used as Example 9. These were each placed in a closed container.

Comparative Example 7 A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Examples 7 to 9 except that diethylene glycol was not added at all. Was. <Comparative Examples 8 and 9> Examples 7 to 9 except that the amount of diethylene glycol was changed to 0.02 parts by weight and 0.7 parts by weight.
In the same manner as in Example 9, a one-powder type polymer cement composition for semi-flexible pavement was prepared. The composition mixed with 0.02 parts by weight was designated as Comparative Example 8, and the composition mixed with 0.7 parts by weight was designated as Comparative Example 9.
These were each put in a closed container.

<Examples 10 to 12> 40 parts by weight of silica sand No. 7 and fine limestone powder 4 having a Blaine value of 3000 cm ² / g
0 parts by weight and 1 part by weight of a liquid glycol ether as a shrinkage reducing agent were collected in a container of a universal mixer, and a stirring blade was attached, and the mixture was first stirred at low speed for 10 minutes. Subsequently, 100 parts by weight of ordinary Portland cement, 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 sulfonate condensate salt) as a powder additive were added to the container. 9 parts by weight, 0.02 parts by weight of a thickener (hydroxyethylcellulose) and diethylene glycol are added at a predetermined ratio, and the mixture is stirred and mixed for 20 minutes at a high stirring speed to obtain a one-powder type polymer cement composition for semi-flexible pavement. Was prepared. The composition in which the mixing ratio of diethylene glycol was 0.05 part by weight was used as Example 10, and 0.1% by weight was used.
The composition in which 1 part by weight was mixed was referred to as Example 11, and the composition in which 0.5 part by weight was mixed was referred to as Example 12, each of which was placed in a closed container.

Comparative Example 10 A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Examples 10 to 12 except that no diethylene glycol was added.
This was placed in a closed container as Comparative Example 10. <Comparative Examples 11 and 12> Example 1 except that the amount of diethylene glycol was changed to 0.02 parts by weight and 0.7 parts by weight.
A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Examples 0 to 12. The composition obtained by mixing 0.02 parts by weight was referred to as Comparative Example 11, and the composition obtained by mixing 0.7 parts by weight was referred to as Comparative Example 12.

<Examples 13 to 15> Examples 10 to 15 were repeated except that the amount of the shrinkage reducing agent was increased from 1 part by weight to 2 parts by weight.
A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Example 12, and these were placed in closed containers as Examples 13 to 15, respectively. Comparative Example 13 A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Examples 13 to 15 except that no diethylene glycol was added at all. <Comparative Examples 14 and 15> Example 1 was repeated except that the amount of diethylene glycol was changed to 0.02 parts by weight and 0.7 parts by weight.
A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Examples 3 to 15, and a composition obtained by mixing 0.02 parts by weight was referred to as Comparative Example 14, and a composition obtained by mixing 0.7 parts by weight was used as Comparative Example. As No. 15, these were each put in a closed container.

Examples 16 to 18 Examples 10 to 18 were repeated except that the amount of the shrinkage reducing agent was increased from 1 part by weight to 4 parts by weight.
A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Example 12, and these were used as Examples 16 to 18, and these were respectively placed in closed containers. <Comparative Example 16> A one-powder type polymer cement composition for semi-flexible pavement was prepared in the same manner as in Examples 16 to 18 except that no diethylene glycol was added. <Comparative Examples 17 and 18> Example 1 except that the amount of diethylene glycol was changed to 0.02 parts by weight and 0.7 parts by weight.
In the same manner as in Examples 6 to 18, a one-powder type polymer cement composition for semi-flexible pavement was prepared. A composition in which 0.02 parts by weight was mixed was referred to as Comparative Example 17, and a composition in which 0.7 parts by weight was mixed was referred to as Comparative Example 18, each of which was placed in a closed container.

<Examples 19 to 21> Among the components of the quick-setting cement described above, the component added to Portland cement or the mixed cement was used as a quick-setting material (manufactured by Mitsubishi Materials Corporation).
Examples 13 to 15 except that 45 parts by weight of this quick-hardening material was further added to the components of Examples 13 to 15, and no high-performance water reducing agent and thickener were added as powder additives. In the same manner as described above, a one-powder type polymer cement composition for semi-flexible pavement was prepared, and these were each placed in a closed container. <Comparative Example 19> A one-powder type polymer cement composition for semiflexible pavement was prepared in the same manner as in Examples 19 to 21 except that no diethylene glycol was added. <Comparative Examples 20 and 21> Example 1 was repeated except that the amount of diethylene glycol was changed to 0.02 parts by weight and 0.7 parts by weight.
In the same manner as in Examples 0 to 21, a one-powder type polymer cement composition for semi-flexible pavement was prepared. The composition obtained by mixing 0.02 parts by weight was referred to as Comparative Example 20, and the composition obtained by mixing 0.7 parts by weight was referred to as Comparative Example 21. Table 1 shows the composition of Examples 1-21 and Comparative Examples 1-2.
Table 2 shows the composition of No. 1. In Tables 1 and 2, "D
"EG" means diethylene glycol.

[0026]

[Table 1]

[0027]

[Table 2]

<Test and Evaluation> A one-powder type polymer cement composition for semi-flexible pavement placed in a closed container was heated to a temperature of 2%.
It was placed in a constant temperature and humidity room at 0 ° C. and a relative humidity of 80%, opened, left for 1 day, left for 14 days, and left for 28 days. Thereafter, three types of cement milk were mixed with three types of compositions. Prepared and measured the flow value and time to set of each cement milk. The preparation of the cement milk was carried out using the one-powder type polymer cement composition 100 for semi-flexible pavement of Examples 1 to 6, 10 to 21 and Comparative Examples 1 to 6, 10 to 21.
Parts by weight were added to 45 parts by weight of water.
-100 and 100 parts by weight of the one-powder type polymer cement composition for semi-flexible pavement of Comparative Examples 7 to 9 were added to 50 parts by weight of water, and each was uniformly mixed with a mixer. The flow value was tested according to the standard of Japan Society of Civil Engineers, "Method of testing fluidity of pre-packed concrete pouring mortar (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 21 and Comparative Examples 1 to 21 was poured into a vertically supported funnel, and the respective flow values were determined, and the fluidity was determined. Was evaluated. The results are shown in Tables 3 and 4.

[0029]

[Table 3]

[0030]

[Table 4]

Tables 3 and 4 and FIGS. 1 to 7 show that the one-powder type polymer cement composition for semi-flexible pavement of the example to which 0.05 to 0.5 parts by weight of diethylene glycol was added was set regardless of the storage period. No change was observed in the time and flow values up to, but a single-powder type for semi-flexible pavement without the addition of diethylene glycol or added in a ratio outside the range of 0.05 to 0.5 parts by weight. In the polymer cement composition, it was found that the longer the storage period, the longer the time until setting.

[0032]

As described above, the present invention is a one-powder type polymer cement composition, so that it can be quickly prepared at a construction site, and a normal or early-strength Portland cement obtained by adding an ultra-fast-hardening cement or a rapidly hardening material to the cement. Even in the case of using, the adverse effect on the construction of the cement milk for infiltration can be minimized. Also, even if the worker is immature, there is no possibility of mis-mixing. In addition, since diethylene glycol is mixed, the setting time of the prepared cement milk does not change even when stored for a long time.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI // (C04B 28/02 C04B 14:28 14:28 14:06 Z 14:06 24:26 E 24:26 14:10 Z 14:10 24:02 24:02 22:06 A 22:06) (72) Inventor Hiroshi Jigizono 1-297 Kitabukuro-cho, Omiya-shi, Saitama Pref. JP-A-2-51461 (JP, A) JP-A-3-295905 (JP, A) JP-A-4-228462 (JP, A) JP-A-1-172252 (JP, A) JP-A-7-53252 (JP JP-A-5-208853 (JP, A) JP-A-10-1346 (JP, A) JP-A-9-328822 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB Name) C04B 7/00-32/02

Claims (5)

(57) [Claims] 1. A composition prepared by uniformly mixing cement, limestone fine powder, silica sand, re-emulsifiable powder resin, smectite-type clay mineral and powder additive at a predetermined ratio,
The composition further contains diethylene glycol 0.05 to
A one-powder type polymer cement composition for semi-flexible pavement, which is mixed at 0.5% by weight. 2. A composition prepared by uniformly mixing cement, limestone fine powder, silica sand, re-emulsifiable powder resin, silica fume, and a powder additive at a predetermined ratio, further comprising: A one-powder type polymer cement composition for semi-flexible pavement, characterized in that diethylene glycol is mixed at 0.05 to 0.5% by weight. 3. A composition prepared by uniformly mixing cement, silica sand, a re-emulsifiable powder resin, a shrinkage reducing agent, and a powder additive at a predetermined ratio, further comprising diethylene glycol in the composition. A one-powder type polymer cement composition for semi-flexible pavement, which is mixed at 0.05 to 0.5% by weight. 4. A composition prepared by uniformly mixing cement, limestone fine powder, silica sand, a re-emulsifiable powder resin, a shrinkage reducing agent and a powder additive in a predetermined ratio, wherein the composition is A one-powder type polymer cement composition for semi-flexible pavement, further containing 0.05 to 0.5% by weight of diethylene glycol. 5. A composition prepared by uniformly mixing cement, fast-hardening material, fine limestone powder, silica sand, re-emulsifiable powder resin, shrinkage reducing agent and powder additive in a predetermined ratio. The composition further contains 0.05 to 0.5 of diethylene glycol.
A one-powder type polymer cement composition for a semi-flexible pavement, which is mixed by weight.