KR101832159B1 - Cement paste composition with self-leveling property and road pavement construction method therewith - Google Patents

Abstract

The present invention provides a self-leveling cement paste composition including 100 wt% of binding material and 10-70 of water. The binding material generally includes: 5-60 wt% of Portland cement; 5-45 wt% of blast furnace slag; 1-20 wt% of metakaolin; 0.1-15 wt% of acidic white clay; 0.1-15 wt% of alumina cement; 0.1-15 wt% of gypsum; 0.01-10 wt% of calcium silicate; 0.01-10 wt% of sodium carbonate; 1-30 wt% of silica; 0.01-10 wt% of polyvinyl acetate-vinyl versatate copolymer; 0.01-10 wt% of styrene-butyl acrylate copolymer; 0.01-10 wt% of antifoaming agent; and 0.01-10 wt% of superplasticizer. Accordingly, the present invention is capable of increasing the performance period of pavement, reducing costs for maintenance, and improving constructability by using the self-leveling cement paste composition having excellent in-site applicability, plastic deformation resistance, and asphalt durability.

Description

TECHNICAL FIELD [0001] The present invention relates to a self-smoothing cement paste composition and a road paving method using the composition.

The present invention relates to a self-leveling cement paste composition and a road paving method using the same. More particularly, the present invention relates to a self-leveling cement paste composition having a construction period similar to that of an asphalt pavement and having resistance to plastic deformation and durability, It is about the construction method.

Commonly used road pavement is concrete packing method and asphalt pavement method. The double concrete pavement method has rigidity, it has a limitation on construction for temperature and surrounding environment, takes a long period of curing, has cracks due to drying shrinkage, has a disadvantage such as unfavorable riding comfort and comfort but excellent durability and reduction in maintenance cost And some of them are applied to highway and medium-sized roads.

As a result of the advantages and disadvantages of this concrete pavement method, asphalt pavement method is mainly used for general road pavement.

Asphalt pavement method is mostly used for road pavement because it has ductility, excellent ride quality, low noise, and quick construction. However, it is used as a road such as wheel slippage and plastic deformation due to decrease in durability against medium and large vehicle traffic, traffic volume, It has problems such as frequent maintenance, increase in maintenance cost, discomfort due to traffic disruption, and additional input of social cost.

In recent years, a cement paste which is mixed with asphalt and can impart a semi-rigid property to asphalt has been developed and used.

Korean Patent Registration No. 10-0966791 (Notice of June 29, 2010) Korean Patent Registration No. 10-1041549 (issued on June 15, 2011)

The present invention has been made in order to solve all the problems of the conventional packaging methods. The present invention has been made to solve the problems of the conventional packaging methods, and it is an object of the present invention to provide a packaging material which has excellent field application, plastic deformation resistance and durability of asphalt, And improving the workability, and a road paving method using the same.

The present invention provides a self-reactive cement paste composition comprising 100 parts by weight of a binder and 10 to 70 parts by weight of water in a cement paste composition.

The binder is usually 5 to 60% by weight of Portland cement, 5 to 45% by weight of blast furnace slag, 1 to 20% by weight of meta kaolin, 0.1 to 15% by weight of acidic white clay, 0.1 to 15% by weight of alumina cement, 0.01 to 10% by weight of calcium silicate, 0.01 to 10% by weight of sodium carbonate, 1 to 30% by weight of silica silicate, 0.01 to 10% by weight of a polyvinyl acetate-vinyl versatate copolymer, 0.01 to 10% by weight of a styrene- 0.01 to 10% by weight of an antifoaming agent, and 0.01 to 10% by weight of a fluidizing agent.

The binder may further include a stabilizer for suppressing entanglement of the polymer particles. The stabilizer is preferably contained in an amount of 0.01 to 5% by weight based on the weight of the binder.

The binder may further include a pigment for facilitating identification, and the pigment is preferably contained in an amount of 0.01 to 10% by weight based on the weight of the binder.

The binder may further include a water reducing agent for reducing the water-cement ratio to improve strength and durability, wherein the water reducing agent is contained in an amount of 0.01 to 5 wt% based on the weight of the binder, and the water reducing agent is a water- desirable.

The present invention also relates to a method of manufacturing an asphalt pavement, comprising the steps of: chipping a lay or deteriorated portion of concrete or asphalt concrete and removing impurities; cleaning the removed portion by using a water jet, a hand water and a high pressure sprayer; The method comprising the steps of: applying a self-smoothing cement paste composition to an upper portion of the self-smoothing cement paste composition; And a surface finishing step of rough finishing the composition surface after curing.

The road paving method may further include, after the surface finishing step, applying the surface protective agent to the surface finishing pavement to increase the surface hardness.

The self-lubricating cement paste composition of the present invention has excellent field application, plastic deformation resistance and durability of asphalt, and it can realize an increase in the period of use of the package, reduction in maintenance cost, and improvement in workability. The self-lubricating cement paste composition of the present invention is a composition having a semi-rigidity property, which is excellent in fluidity and easy to apply, and can be cured within a short period of time to shorten the construction period, thereby reducing the construction cost and shortening the maintenance period. In addition, it is excellent in durability and excellent in color persistence, so that the safety of a traffic driver can be sufficiently secured.

The road paving method using the self-leveling cement paste composition of the present invention shows high strength and durability, thereby shortening the construction period, increasing the resistance to plastic deformation, and improving the durability of the asphalt, Can be increased, and the maintenance cost can be reduced. Also, the strength and durability can be improved, so that the maintenance period can be increased and the maintenance period can be reduced.

The self-lubricating cement paste composition of the present invention can be used for coating and repairing various places such as a bus stop, a highway entrance / exit road, an intersection, and an elevated road.

Hereinafter, preferred embodiments according to the present invention will be described in detail. However, it should be understood that the following embodiments are provided so that those skilled in the art will be able to fully understand the present invention, and that various modifications may be made without departing from the scope of the present invention. It is not.

A self-leveling cement paste composition according to a preferred embodiment of the present invention comprises a binder and water.

The binder is usually 5 to 60% by weight of Portland cement, 5 to 45% by weight of blast furnace slag, 1 to 20% by weight of meta kaolin, 0.1 to 15% by weight of acidic white clay, 0.1 to 15% by weight of alumina cement, 0.01 to 10% by weight of calcium silicate, 0.01 to 10% by weight of sodium carbonate, 1 to 30% by weight of silica silicate, 0.01 to 10% by weight of a polyvinyl acetate-vinyl versatate copolymer, 0.01 to 10% by weight of a styrene- 0.01 to 10% by weight of an antifoaming agent, and 0.01 to 10% by weight of a fluidizing agent.

The binder may further include a stabilizer for suppressing entanglement of the polymer particles. The stabilizer is preferably contained in an amount of 0.01 to 5% by weight based on the weight of the binder.

The binder may further include a pigment for facilitating identification, and the pigment is preferably contained in an amount of 0.01 to 10% by weight based on the weight of the binder.

The binder may further include a water reducing agent for reducing the water-cement ratio to improve strength and durability, wherein the water reducing agent is contained in an amount of 0.01 to 5 wt% based on the weight of the binder, and the water reducing agent is a water- desirable.

The ordinary Portland cement may use cement distributed in the market. It is preferable that the ordinary Portland cement contains 5 to 60% by weight based on the weight of the binder.

The blast furnace slag is a potable hydraulic inorganic fine powder which improves the long-term strength of the cement hardened body and tightens the hydrated structure of the cured hardened body to increase the chemical resistance and durability, while reducing the viscosity and improving the fluidity, To be filled. The blast furnace slag is preferably contained in an amount of 5 to 45% by weight based on the weight of the binder. If the content of the blast furnace slag exceeds 45% by weight, initial strength development is deteriorated. If the blast furnace slag content is less than 5% by weight, the performance improving effect is deteriorated.

The meta kaolin has pozzolanic properties and is used for improving long-term strength and durability. The meta kaolin is preferably contained in an amount of 1 to 20% by weight based on the weight of the binder. If the content of the meta kaolin exceeds 20% by weight, the initial strength development is deteriorated. If the content is less than 1% by weight, the performance improving effect is deteriorated.

The acidic clay is porous and has excellent hygroscopicity, so that it is used to prevent material separation and maintain water retention. The acidic clay is preferably contained in an amount of 0.1 to 15% by weight based on the weight of the binder. If the content of the acidic clay exceeds 15 wt%, the performance is improved but the workability is lowered. If the content is less than 0.1 wt%, the material is likely to be separated.

The alumina cement is an inorganic quick-setting material, and when mixed with cement, the compressive strength of ordinary Portland cement obtained in several days or several days can be obtained in several hours. The alumina cement is preferably contained in an amount of 0.1 to 15% by weight based on the weight of the binder. If the content of the alumina cement exceeds 15% by weight, the reactivity is high and the workability tends to be deteriorated. If the content is less than 0.1% by weight, the initial strength development effect becomes insufficient.

The gypsum is used to prevent initial strength development and shrinkage. When the content of the gypsum is increased, rapid curing characteristics are exhibited. The gypsum is preferably contained in an amount of 0.1 to 15% by weight based on the weight of the binder. When the content of the gypsum exceeds 15% by weight, the strength development is improved but easily expanded. When the content of the gypsum is less than 0.1% by weight, the initial strength development and shrinkage reduction effect are insufficient.

The calcium silicate is used for obtaining initial strength development and shrinkage reduction effect. The calcium silicate is preferably contained in an amount of 0.01 to 10% by weight based on the weight of the binder. If the content of the calcium silicate is less than 0.01% by weight, the initial strength development effect and shrinkage reduction effect are insufficient. If the content of the calcium silicate is more than 10% by weight, the curing is accelerated and the workability is decreased and the economical efficiency is lowered.

The sodium carbonate is used to improve strength and durability, particularly corrosion resistance. The sodium carbonate is preferably contained in an amount of 0.01 to 10% by weight based on the weight of the binder. If the content of sodium carbonate is less than 0.01% by weight, the performance improving effect may be deteriorated. If the content of sodium carbonate exceeds 10% by weight, workability is deteriorated and price competitiveness is deteriorated.

The siliceous silica sand is used as a filler to reduce the amount of hydration generated by the hydration reaction of cement and to control cracks caused by the high temperature generated in the rapid hydration in the case of high temperature such as summer, . The silica silica is preferably contained in an amount of 1 to 30% by weight based on the weight of the binder.

The polyvinyl acetate-vinyl versatate copolymer is used to improve strength and durability. The content of the polyvinyl acetate-vinyl versatate copolymer is preferably 0.01 to 10% by weight based on the weight of the binder. If the content of the polyvinyl acetate-vinyl versatate copolymer exceeds 10% by weight, the performance is improved but the workability is lowered. If the content is less than 0.01% by weight, the performance improvement effect is insufficient.

The styrene-butyl acrylate copolymer is used for improving viscosity and water resistance. The content of the styrene-butylacrylate copolymer is preferably 0.01 to 10% by weight based on the weight of the binder. If the content of the styrene-butylacrylate copolymer exceeds 10% by weight, the performance is improved but the workability is lowered. If the content is less than 0.01% by weight, the performance improvement effect is insufficient.

The antifoaming agent is added to reduce an increase in the amount of air due to the generation of entrained air, and any one or more selected from among polyether, silicone, ethyl alcohol and ethylene glycol may be used. However, A species conventionally used in the industry may be used. It is preferable that the defoaming agent is incorporated in an amount of 0.01 to 5 wt% based on the weight of the binder.

The fluidizing agent is used for improving magnetic smoothness. The fluidizing agent is preferably incorporated in an amount of 0.01 to 5% by weight based on the weight of the binder.

The stabilizer is used to suppress aggregation of the polymer particles. The stabilizer is preferably contained in an amount of 0.01 to 5% by weight based on the weight of the binder. Examples of the stabilizer include a sulfonate alkyl ester, a fatty acid soap, an alkyl aryl sulfonate and the like, but it is preferable to use a sulfonate alkyl ester .

The pigment is used for easy identification. The pigment is preferably contained in an amount of 0.01 to 10% by weight based on the weight of the binder. The pigment may be various conventional pigments, and inorganic pigments are particularly preferred. The inorganic pigments may include titanium oxide (white), red iron oxide, yellow iron oxide, chromium oxide (Cr ₂ O ₃ ), purple iron oxide, black iron oxide, carbon black and the like.

The water reducing agent reduces the water-cement ratio of the composition to improve strength and durability. Examples of the water reducing agent include a polycarboxylic acid type, a melamine type, and a naphthalene type. The melamine type or naphthalene type water reducing agent is less effective for improving the strength and durability than the polycarboxylic acid type water reducing agent, and the water- , There is a disadvantage in that the miscibility with the polymer is poor. The water reducing agent is preferably contained in an amount of 0.01 to 5% by weight based on the weight of the binder.

The road paving method using the self-leveling cement paste composition according to the present invention comprises steps of chipping and removing impurities of concrete or deteriorated parts of concrete or asphalt concrete, and removing the impurities by waterjet, hand water and high pressure sprayer The method of claim 1, further comprising the steps of: applying a self-smoothing cement paste composition to an upper portion of the cleaned area; placing the modified asphalt mixture or thermoplastic resin in a cleaned area; And a surface finishing step of roughly finishing the composition surface after curing and curing the infiltrated package by injecting the smooth cement paste composition.

The road paving method may further include, after the surface finishing step, applying the surface protective agent to the surface finishing pavement to increase the surface hardness. .

The curing step may include jointing to prevent reflection cracks proceeding from the concrete.

Hereinafter, the embodiments of the self-activating cement paste composition according to the present invention will be more specifically shown and the present invention is not limited by the following embodiments.

≪ Example 1 >

70% by weight of binder was added thereto, followed by dry mixing with a forced mixer for 1 minute, then 30% by weight of water was added again and mixed for 2 minutes using a forced mixer to prepare a self-reactive cement paste composition.

At this time, the binder is usually 42 weight% of Portland cement, 15 weight% of blast furnace slag, 5 weight% of meta kaolin, 5 weight% of acidic white clay, 5 weight% of alumina cement, 5 weight% of gypsum, 2 weight% of calcium silicate, 1% by weight of an antifoaming agent, 1% by weight of a fluidizing agent, 1% by weight of a stabilizer, 2% by weight of a polyvinyl acetate- 1% by weight of a pigment and 1% by weight of a water reducing agent were mixed to prepare a binder. As the fluidizing agent and the reducing agent, a polycarboxylic acid-based fluidizing agent and a water reducing agent were used, and a silicone-based defoaming agent was used as the defoaming agent. Sulfonate alkyl esters were used as the stabilizer. As the pigment, titanium oxide was used.

≪ Example 2 >

65% by weight of binder was added thereto, followed by dry mixing with a forced mixer for 1 minute. Then, 35% by weight of water was added again and mixed for 2 minutes using a forced mixer to prepare a self-reactive cement paste composition.

At this time, the binder is usually 42 weight% of Portland cement, 15 weight% of blast furnace slag, 5 weight% of meta kaolin, 5 weight% of acidic white clay, 5 weight% of alumina cement, 5 weight% of gypsum, 2 weight% of calcium silicate, 1% by weight of an antifoaming agent, 1% by weight of a fluidizing agent, 1% by weight of a stabilizer, 2% by weight of a polyvinyl acetate- 1% by weight of a pigment and 1% by weight of a water reducing agent were mixed to prepare a binder. As the fluidizing agent and the reducing agent, a polycarboxylic acid-based fluidizing agent and a water reducing agent were used, and a silicone-based defoaming agent was used as the defoaming agent. Sulfonate alkyl esters were used as the stabilizer. As the pigment, titanium oxide was used.

≪ Example 3 >

60% by weight of binder was added thereto, followed by dry mixing using a forced mixer for 1 minute, then 40% by weight of water was added again and mixed for 2 minutes using a forced mixer to prepare a self-reactive cement paste composition.

At this time, the binder is usually 42 weight% of Portland cement, 15 weight% of blast furnace slag, 5 weight% of meta kaolin, 5 weight% of acidic white clay, 5 weight% of alumina cement, 5 weight% of gypsum, 2 weight% of calcium silicate, 1% by weight of an antifoaming agent, 1% by weight of a fluidizing agent, 1% by weight of a stabilizer, 2% by weight of a polyvinyl acetate- 1% by weight of a pigment and 1% by weight of a water reducing agent were mixed to prepare a binder. As the fluidizing agent and the reducing agent, a polycarboxylic acid-based fluidizing agent and a water reducing agent were used, and a silicone-based defoaming agent was used as the defoaming agent. Sulfonate alkyl esters were used as the stabilizer. As the pigment, titanium oxide was used.

In order to compare the physical properties of the self-lubricating cement paste compositions prepared according to the above-described Examples 1 to 3, cement paste compositions which are generally widely used at present are presented as Comparative Example 1 and Comparative Example 2.

≪ Comparative Example 1 &

A cement paste was prepared by mixing 60 wt% of Portland cement, 10 wt% of silica silica, and 30 wt% of water, and 1 wt% and 1 wt% of a polycarboxylic acid-based fluidizing agent and a pigment were added to the total weight of the cement paste, Was added to obtain a cement paste composition. As the pigment, titanium oxide was used.

≪ Test Example 1 > Preparation of test specimens

(For compression and bending strength test, dry shrinkage test, chloride ion penetration depth test, and absorption rate test), 4x4x1 cm For the bonding strength test, molds were used to fabricate the test specimens.

≪ Test Example 2 > Slump-flow measurement

Table 1 below compares the workability of the composition prepared according to the present invention and the composition prepared in the comparative example.

division Example 1 Example 2 Example 3 Comparative Example 1 Slump flow (mm) 272 278 288 250

As shown in Table 1, the compositions prepared according to Examples 1 to 3 of the present invention had higher slump-flow values than that of the composition prepared according to Comparative Example 1, without bleeding and material separation. This means that the compositions prepared according to Examples 1 to 3 are highly flowable and have excellent workability so that the pore portions of the porous asphalt mixture are effectively filled, resulting in the production of a tightly packed semi-rigid mixture, .

≪ Test Example 3 >

In order to compare the physical properties of the composition prepared according to the present invention and the composition prepared in the comparative example, the respective specimens prepared in Test Example 1 were subjected to the compression strength, flexural strength and adhesive strength test by KS F 2476 , And the results are shown in Table 2 below.

division Strength (kgf / cm2) compression warp adhesion 1 day 7 days 28th 1 day 7 days 28th 1 day 7 days 28th Example 1 233 325 405 45 70 100 16 21 25 Example 2 227 315 395 43 66 95 15 20 23 Example 3 222 312 390 40 64 88 14 19 22 Comparative Example 1 200 300 379 35 53 73 10 15 19

As shown in Table 2, it can be seen that Examples 1 to 3 prepared in the present invention are superior in strength development as compared with Comparative Example 1.

≪ Test Example 4 > Dry shrinkage measurement

After preparing the specimen as in Test Example 1, the rate of change in length was measured by KS F 2476, and the results are shown in Table 3 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Length change rate (%) 0.08 0.07 0.06 0.12

As shown in Table 3, it was found that the compositions prepared according to Examples 1 to 3 of the present invention had very low drying shrinkage as compared with the composition prepared according to Comparative Example 1. [

≪ Test Example 5 > Chloride ion penetration depth

In order to compare chloride ion penetration depths of the compositions prepared according to the present invention and the compositions prepared in the comparative examples, tests were conducted on KS F 2476 for each of the specimens prepared in Test Example 1, Table 4 shows the results.

division Example 1 Example 2 Example 3 Comparative Example 1 Chloride ion penetration depth (mm) 0.4 0.5 0.6 2.5

As shown in Table 4, the compositions prepared according to Examples 1 to 3 of the present invention had a chloride ion penetration depth lower than that of the composition prepared according to Comparative Example 1, I could.

≪ Test Example 6 >

In order to compare the absorption rate of the composition prepared according to the present invention with the composition prepared in the comparative example, the absorptivity of each of the specimens prepared in Test Example 1 was measured by KS F 2476, Respectively.

division Example 1 Example 2 Example 3 Comparative Example 1 Absorption Rate (%) 0.4 0.5 0.6 2.5

As shown in Table 5, the compositions prepared according to Examples 1 to 3 of the present invention showed very low water absorption as compared with the composition prepared according to Comparative Example 1. [ It was found that the water penetration due to the incorporation of the polymer is low and the water resistance is excellent.

≪ Test Example 7 > Measurement of skid resistance

In order to compare the slip resistance of the composition prepared according to the present invention with the composition prepared in the comparative example, ASTM E303 (Method for measuring surface friction characteristics), AASHTO T 278 (British pendulum surface friction characteristics measured with a tester), and the results are shown in Table 6 below.

division Example 1 Example 2 Example 3 Comparative Example 1 Slip resistance (BPN) 75 74 74 70

As shown in Table 6, it was confirmed that the compositions prepared according to Examples 1 to 3 of the present invention had higher slip resistance than the compositions prepared according to Comparative Example 1. [ It can be seen that when the vehicle is packed on the road, the braking performance of the vehicle is excellent and the accident rate can be lowered.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, This is possible.

Claims (6)

A self-smoothing cement paste composition for road paving,
100 parts by weight of a binder and 10 to 70 parts by weight of water,
The binder is usually 5 to 60% by weight of Portland cement, 5 to 45% by weight of blast furnace slag, 1 to 20% by weight of meta kaolin, 0.1 to 15% by weight of acidic clay, 0.1 to 15% by weight of alumina cement, 0.01 to 10% by weight of calcium silicate, 0.01 to 10% by weight of sodium carbonate, 1 to 30% by weight of silica silicate, 0.01 to 10% by weight of a polyvinyl acetate-vinyl versatate copolymer, 0.01 to 10% by weight of a styrene- 0.01 to 10% by weight of an antifoaming agent and 0.01 to 10% by weight of a fluidizing agent,
The binder preferably contains 0.01 to 5% by weight of a stabilizer for suppressing entanglement of the polymer particles; 0.01 to 10% by weight of pigment for facilitating identification; And 0.01 to 5% by weight of a water reducing agent for improving the strength and durability by reducing the water-cement ratio,
The slump-flow (mm) of the self-smoothing cement paste composition was 272 to 288, and the test was conducted by ASTM E303 (surface friction property measurement method) and AASHTO T 278 (surface friction property measured by British pendulum tester) The slip resistance (BPN) is 74 to 75
By weight based on the total weight of the composition.
delete delete delete A road pavement method using the autoclaved cement paste composition for road paving according to claim 1,
Cleaning the road surface;
Providing a cleaned area with an asphalt mixture or a thermoplastic resin;
Injecting the autoclaved cement paste composition for road paving into an installed upper part;
Curing the infiltrated package by injecting the autoclaved cement paste composition for road paving; And
And a surface finishing step of rough finishing the composition surface after curing.
6. The method of claim 5,
Further comprising, after the surface finishing step, applying a surface protective agent on the surface finished package to increase the surface hardness.