KR20200057296A - A cement concrete pavement composite including functions of waterproof and cement concrete pavement method using the composite - Google Patents

Abstract

The present invention proposes a cement concrete pavement composition having a waterproof function and a pavement method of integrally exposed cement concrete using the composition. The cement concrete pavement composition includes a cement binder, fine aggregate, coarse aggregate, and water, and is composed of 2.0 to 3.4 parts by weight of the cement binder, 3.4 to 4.8 parts by weight of the fine aggregate, and 5.7 to 7.1 parts by weight of the coarse aggregate for 1 part by weight of water. The pavement method of integrally exposed cement concrete using the cement concrete pavement composition includes a pre-preparation step, a pouring step, a flattening step, a surface treatment step, and a curing agent application step.

Description

Composition for waterproofing cement concrete pavement and method for packaging integrally exposed cement concrete using the composition {A cement concrete pavement composite including functions of waterproof and cement concrete pavement method using the composite}

The present invention relates to a composition for paving cement concrete, and in particular, has strength and crack resistance suitable for repeated traffic loads, and has a waterproof function that satisfies all of waterproof, salt penetration resistance, freeze-thaw resistance, scaling resistance, abrasion resistance, etc. The present invention relates to a composition for paving cement concrete and a method for packaging integrally exposed cement concrete using the composition.

In general, pavement can be divided into two types: asphalt pavement and cement concrete pavement. The asphalt pavement method is a method of forming a pavement layer by laying asphalt concrete (asphalt concrete: ASCON), which has the advantage of good workability, low initial investment, and excellent flatness, resulting in a good driving feel. However, there is a disadvantage that it may cause traffic obstacles along with excessive maintenance costs because repacking should be performed periodically in order to prevent failure of securing required driving properties due to plastic deformation and surface deterioration. In particular, when installing asphalt on the upper surface of the existing concrete, there is a disadvantage that separation and dropping of the pavement layer may occur due to combination of different heterogeneous materials.

Since the concrete pavement method uses portland cement for the entire pavement thickness, it has the advantage of being economical and excellent in construction because it has a low material cost, but has the disadvantage that it is prone to cracking of concrete due to vibration due to repeated vehicle traffic. . In addition, it has the disadvantage of preventing corrosion of reinforcing bars due to the penetration of harmful chemicals such as chloride from the crack site due to its anti-corrosive performance, or it is difficult to promote salt penetration resistance through a waterproof concrete formulation design, causing economic loss. .

As described above, in order to effectively prevent the penetration of chloride or moisture that directly affects the durability of concrete, it is required in the latex modified concrete (LMC) pavement method and bridge pavement with synthetic rubber latex resin (SBR) added to concrete. VES-LMC method, HPC method, PCMC method, self-healing modified latex concrete, or other surface layer construction materials or methods that satisfy all of the quality performances proposed have been proposed and used. This method uses a method of packaging 3 to 7 cm thick in two steps over existing concrete. Although it showed excellent adhesion performance in the laboratory, it has been applied to the actual site, and as a result, it has a high temperature on the road surface of the road in summer and silicone-modified latex. As the stability of the resin decreases, there is a shortcoming in that a problem of initial plastic shrinkage cracking and lack of adhesion performance with the floor concrete frequently occurs due to fluctuations in the timing of formation of a cured film of silicone modified latex.

From the point of view of flatness and driving noise problems, normal cement concrete pavement can make vertical grooves on the road (selected from pavement or exposed surface) to maintain driving and comfort, but exposed cement concrete pavement is micro cement , It is a cement concrete composition that improves physical properties such as watertightness by using silica fume, super hard cement, etc., and has a disadvantage that it does not satisfy chloride ion penetration resistance and complex durability requirements.

As such, the exposed cement concrete pavement has a strength and crack resistance suitable for repeated traffic loads because it becomes a part that directly transmits the traffic loads. In addition, considering that it is exposed to moisture such as rain water, it is necessary to secure the waterproof property of the concrete itself and satisfy salt penetration resistance, freeze-thaw resistance, and abrasion resistance.

Republic of Korea Patent Registration No. 10-1619288 (May 02, 2016)

Technical problem to be solved by the present invention, salt penetration resistance, freeze-thaw resistance, scaling resistance, crack resistance and abrasion resistance, such as improved durability and self-healing function and waterproof performance to improve the dry shrinkage resistance of cement concrete pavement road It is to provide a composition for paving cement concrete with a waterproof function capable of significantly reducing the lifespan and maintenance cost.

Another technical problem to be solved by the present invention is an integrally exposed cement concrete that simultaneously casts the entire pavement thickness without using the two-step surface layer material having a thickness of 3 to 7 cm over the base concrete with the composition for waterproofing cement concrete. It is to provide a packaging method of.

To achieve the above technical problem, the composition for paving cement concrete with a waterproof function according to the present invention, with respect to 1 part by weight of water, 2.0 to 3.4 parts by weight of cement binder, 3.4 to 4.8 parts by weight of fine aggregate, and 5.7 to 7.1 parts by weight of coarse aggregate Consisting of, the cement binder, 1 part by weight of fly ash, Portland cement 7.2 to 8.0 parts by weight, blast furnace slag 2.6 to 3.275 parts by weight, silica fume 0.125 to 0.625 parts by weight, chemical admixture 0.081 to 0.168 parts by weight and powder waterproofing material Consisting of 0.151 to 0.49 parts by weight, the powder water repellent is a high-fat fatty acid-based zinc stearate, a lignin sulphonate (lignin sulphonate) -based surfactant, and a re-emulsifying powder resin comprising a styrene-acrylic copolymer polymer, respectively 5.4 to 8.2: 5.1 It was mixed at a weight ratio of 7.7: 1, and the re-emulsifiable powder resin was mixed with one of silane and siloxane and a styrene-acrylic copolymer polymer in a weight ratio of 1: 6.

The packaging method of the integrally exposed cement concrete using the composition for paving cement concrete according to the present invention for achieving the above other technical problems performs a pre-preparation step, a pouring step, a planarization step, a surface treatment step, and a curing agent coating step. In the preliminary step, the pouring surface is sprayed with water on the auxiliary base or the upper part of the formwork to keep the bottom surface wet. In the pouring step, the composition for cement concrete pavement according to claim 1 is poured on the auxiliary base layer or the bottom surface of the formwork, that is, the wet surface. In the flattening step, the surface of the composition for paving cement concrete laid in the pouring step is flattened. In the surface treatment step, a vertical (or transverse) groove is formed in the vertical or horizontal direction of the exposed pavement surface flattened in the flattening step. In the curing agent application step, the curing agent is applied to the surface of the packaging surface treated in the surface treatment step.

The integrally exposed cement concrete pavement according to the present invention extends the life span of the cement concrete pavement by improving the durability limit due to lack of salt penetration resistance, freeze-thaw resistance and scaling resistance, crack resistance, and abrasion resistance due to the concrete absorbing moisture. The effect and maintenance cost can be greatly reduced, and when micro-cracks occur on the exposed concrete pavement surface, self-healing microcrystalline particles are generated by reacting with the precipitates of the pozzolanic material in the inorganic cement binder and the water-repellent composition, and filling and healing the micro-intervals to reduce the moisture. It can be expected to improve durability by reducing physical performance due to penetration and improving recovery performance of damaged parts, and it is possible to develop a composition for cement concrete pavement that satisfies various durability-related properties such as securing waterproof performance of concrete itself and salt penetration resistance to snow removing agents. The used concrete-integrated exposed cement concrete pavement method can have the effect of saving construction resources and preventing environmental pollution.

1 shows the composition of a composition for paving cement concrete with a waterproof function according to the present invention.
Figure 2 is a flow chart of a method of packaging a monolithic exposed cement concrete using the composition according to the present invention.
FIG. 3 is a photograph of a waterproof composition performing a mock-up to confirm self-healing properties.
4 and 5 is a quality test and inspection report card issued by the construction test institute of Korea SGS Co., Ltd. for exposed exposed concrete concrete using PPS concrete powder waterproofing agent prepared according to the present invention.

In order to fully understand the present invention and the operational advantages of the present invention and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the contents described in the accompanying drawings, which illustrate exemplary embodiments of the present invention.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. The same reference numerals in each drawing denote the same members.

1 shows the composition of a composition for paving cement concrete with a waterproof function according to the present invention.

Referring to FIG. 1, a cement concrete pavement composition having a waterproof function according to the present invention (100, hereinafter, a composition for paving cement concrete) is based on 1 part by weight of water, 2.0 to 3.4 parts by weight of cement binder, 3.4 to 4.8 parts by weight of fine aggregate, and It can be seen that it is composed of 5.7 to 7.1 parts by weight of coarse aggregate.

Aggregates can be divided into fine aggregates and coarse aggregates. In the following description, it is assumed that particles having a particle size of 5 mm or less are fine aggregates, and a particle size of 5 mm to 25 mm is assumed to be a coarse aggregate.

Here, the cement binder is 7.2 to 8.0 parts by weight of Portland cement, 2.6 to 3.275 parts by weight of blast furnace slag, 0.125 to 0.625 parts by weight of silica fume, 0.081 to 0.168 parts by weight of chemical admixture, and 0.151 to 0.49 parts of powder waterproofing material, based on 1 part by weight of fly ash. Consists of parts by weight.

In the present invention, it is proposed to use one or a combination of Portland cement (1, 2, 3, 5), blast furnace slag cement, fly ash cement and silica cement.

The blast furnace slag has a specific surface area of 4,000 cm 2 / g to 5,500 cm 2 / g, which is obtained by rapidly cooling the molten slag produced with pig iron in a furnace at about 1500 ° C. with water and drying the water-retained slag on the glassy glass to pulverize it. The blast furnace slag has latent hydraulic properties, and itself has a weak curing property, but has a property of curing by stimulation of alkali. When blast furnace slag is usually used in combination with Portland cement, curing may be accelerated by the action of calcium hydroxide or sulfate. Due to the latent hydraulic properties of blast furnace slag, it is usually used in the bonding materials of Portland cement to improve water permeability, long-term strength and durability.

Fly ash has a specific surface area of 3,000cm2 / g to 4,500cm2 / g, and is a fine powder by-product generated at a rate of about 15% to 45% of the raw coal when burning pulverized coal, a fuel of a thermal power plant, at a high temperature of 1400 ℃ to 1500 ℃. It means the ash collected by the dust collector. Fly ash belongs to artificial pozzolans, and has no hydraulic properties in itself, but the silica component has a property of curing by generating a stable insoluble compound by slowly reacting pozzolanic reaction with calcium hydroxide, a hydration product of lime and cement, at room temperature. Therefore, the cement binder has long-term strength, durability, and self-healing properties that fill up fine cracks.

Silica fume has a specific surface area of 150,000 cm 2 / g to 300,000 cm 2 / g, and is an ultrafine by-product generated by mixing silicon and silicon silicon alloys, such as ferrosilicon, in the exhaust gas and floating by mixing them. Silica. The silica fume typically has a specific gravity of about 2.2, and the particle size is mostly 1 µm or less, on average about 0.1 µm, and improves the mechanical performance and chemical resistance of concrete due to its high pozzolanic reaction and characteristics with a large specific surface area.

Chemical admixtures are used to improve workability and resistance to freeze-thawing by entraining innumerable fine air bubbles independent of concrete with high-performance water reducing agents used to improve strength and durability by reducing the mixing ratio of water-cement in the composition. It is suggested to use AE, an air entraining agent. The high-performance water reducing agent includes at least one of naphthalene sulfonate-based, melamine formalin resin sulfonate-based, and polycarboxylic acid-based, and AE agent includes at least one of resin-based, alkyl benzulfonic acid-based, higher alcohol lactic acid ester-based, and nonionic based. do.

Powdered waterproofing materials are one of the important properties required for exposed cement concrete to improve the resistance to cracks caused by repeated passage vibrations and plastic shrinkage, and the ability to naturally heal and waterproof by the precipitates produced by pozzolanic materials. Used, and includes high-grade fatty acid-based metal salts, lignin sulfonate-based surfactants, and re-emulsifying powder resins.

The powder waterproofing material is mixed with 5.4 to 8.2 parts by weight of high-fat fatty acid-based stearic acid zinc and 5.1 to 7.7 parts by weight of lignin sulphonate-based surfactant with respect to 1 part by weight of a re-emulsifying powder resin containing a styrene-acrylic copolymer polymer. Get

It is preferable to use a re-emulsifiable powder resin in which a silicone resin is a hydrophobic compound (hydrophobic) in which one of silane (Silane) and siloxane (Siloxane) and a styrene-acrylic copolymer polymer are mixed in a weight ratio of 1: 6. By using one of the water-repellent silanes and siloxanes and the water-resistant styrene-acrylic copolymer polymer, the adhesion and abrasion resistance as well as the water-soluble protective colloid of the resin have the ability of the concrete to retain water. To improve and suppress the evaporation of water by forming a film on the concrete surface, it was possible to minimize cracks caused by shrinkage during drying or curing.

The higher fatty acid-based metal salt is preferably made of at least one material selected from zinc stearate, calcium stearate, ammonium stearate, calcium oleate, aluminum oleate, and butyl stearate.

When surfactants use melamine-based or naphthalene-based water-reducing agents in the powder waterproofing composition, there is a problem in that the slump is remarkably dropped and workability is deteriorated due to incompatibility with concrete materials. In order to solve this problem, the present invention uses a lignin sulphonate-based surfactant that is compatible with a chemical admixture and enhances the dispersibility of cement, thereby reducing the water binding material ratio and improving workability with proper fluidity. .

The re-emulsifiable powder resin is preferably made of at least one material selected from vinyl acetate monopolymer, vinyl acetate / ethylene copolymer polymer, styrene-acrylic copolymer polymer, ethylene / vinyl laurate / vinyl chloride tripolymer polymer.

Figure 2 is a flow chart of a method of paving a monolithic exposed cement concrete using the composition according to the present invention.

Referring to FIG. 2, the method for packaging integrally exposed cement concrete using the composition according to the present invention (200, hereinafter, the packaging method for integrally exposed cement concrete) includes a preliminary step 210, a pouring step 220, and a flattening method. The step 230, the surface treatment step 240 and the curing agent application step 250 are performed.

In the preliminary preparation step 210, water is sprayed on the auxiliary base or the upper part of the formwork to keep the bottom surface in a wet state. First, in general, soil is used to form a hearth, furnace body, and then crushed stone is used to build a frost-resistant layer and a sub-base layer, and a prime coating, which is a waterproof layer, is applied, but in the concrete-integrated exposed cement concrete pavement method, the sub-machine Wet the surface of the layer or the top of the bridge slab with water and wet it before construction.

In the pouring step 220, the composition for cement concrete pavement having the composition shown in FIG. 1 is poured onto the wet surface of the pouring state (secondary layer or upper formwork) that has undergone the preliminary preparation step 210. The cement concrete pavement composition is poured with a certain thickness on the auxiliary base or the upper part of the formwork in consideration of the thickness to be cast using a batch mixer or a mobile mixer.

In the planarization step 230, the pavement surface that is poured with the cement concrete pavement composition is flattened, and at least one of a screed, a roller tube, and a roller paper may be used for the planarization operation.

In the surface treatment step 240, a groove in a certain direction is formed on the flattened exposed pavement surface, for example, a surface treatment that forms a groove in a vertical or horizontal direction with respect to a road traveling direction. The surface treatment can be realized by forming a longitudinal groove on the exposed cement concrete surface by a tinning or grooving method to increase water noise and drainage of the vehicle after planarization to prevent water film and slip.

In the curing agent application step 250, the curing agent is applied so that the surface-treated road pavement surface is less affected by temperature changes. Concrete curing by application of a curing agent after the surface treatment varies depending on the amount of the cement concrete pavement composition, the weather, etc., but it is generally preferred to perform wet curing for 48 to 72 hours and dry curing for 3 to 10 days. Do.

Table 1 describes two examples and comparative examples according to the mixing ratio of the cement binder in the composition for paving cement concrete according to the present invention.

division Example 1 Example 2 Comparison example Portland Cement 60 66 64 Blast furnace slag 25.4 20 25 Fly ash 8 8 8 Silica fume 5 One 2 Chemical admixture 0.3 One One Powder waterproofing material 1.3 4 -

Referring to Table 1, in two examples and comparative examples, the mixing ratio of fine aggregate, coarse aggregate, and water and the mixing ratio of cement binder are the same, and thus will not be described separately. Referring to Table 1, the composition for the cement concrete pavement 100 according to the present invention can also be seen the composition ratio of the two examples performing a waterproof function and a comparative example not using a powder waterproofing material.

Example 1 of the composition for paving cement concrete according to the present invention is a mixture of Portland cement, blast furnace slag, fly ash, silica fume, chemical admixture, and powder waterproofing agent in a weight ratio of 60: 25.4: 8: 5: 0.3: 1.3 as a cement binder. , Example 2 is a mixture of Portland cement, blast furnace slag, fly ash, silica fume, chemical admixture and powder waterproofing material as a cement binder in a weight ratio of 66: 20: 8: 1: 1: 4.

As a comparative example, it can be seen that the composition of Portland cement, blast furnace slag and silica fume was adjusted instead of using the powder waterproofing material in Example 1.

All of the ratios described in the following description mean weight ratios.

division Example 1 Example 3 Comparison example Salt penetration resistance (Coulomb) 954 937 1,131

Table 2 shows the results of the salt penetration resistance test according to the method defined in ASTM C 1202 "Electrical Indication of Concrete's Ability to Resist Chloride Ion Penetration" according to the blending ratios presented in the two examples and comparative examples. The pass charges calculated in the test are evaluated to be high when the 4,000 coulomb is greater than or equal to 2,000, 4,000 coulomb is usually high, 1,000 to 2,000 coulomb is low, and 100 to 1,000 coulomb is very low. Performance below 1,000 coulombs is required. Referring to Table 2, it can be seen that the salt penetration resistance of the two examples is lower than that of the comparative example.

Table 3 shows the relative dynamics for 300 cycles in Method A (underwater freezing, underwater melting) of KS F 2456 "Test Method for Resistance of Concrete to Rapid Freeze-Thawing" according to the blending ratios presented in the two Examples and Comparative Examples. The result of the comparative test with the elastic modulus is shown.

division Example 1 Example 2 Comparison example Freeze-thaw resistance (%) 83.0 83.8 75.5

Referring to Table 3, the relative freeze-thaw resistance calculated in the test requires performance of 80% or more on the integrally exposed cement concrete pavement, but the comparative example that did not include the powder waterproofing material did not pass the standard, but two tests were conducted. It can be seen that all examples pass this criterion.

Table 4 shows the results of the scaling (peeling) resistance test in accordance with SS 13 72 44 "Peeling Resistance Test in Freezing" according to the blending ratios presented in the two Examples and Comparative Examples.

division Example 1 Example 2 Comparison example Scaling resistance ㎏ / ㎡ 0.41 0.37 0.85 m ₅₆ / m ₂₈ 1.85 1.86 2.05

After 56 cycles calculated in the test, the average peeling amount (m ₅₆ ) is less than 1.0kg / m 2, and at the same time, m ₅₆ / m ₂₈ is less than 2, and it is a peel-resistant bonding grade. Performance. Referring to Table 4, it can be seen that the cement concrete pavement composition according to the two examples had a lower peel resistance than the comparative example, and thus the peel resistance of the concrete pavement surface due to freezing and thawing in winter was high.

Table 5 shows the results of the crack generation resistance evaluation test of concrete according to the AASHTO PP 34-99 "Standard Method of Test for Estimating the Cracking Tendency of Concrete" according to the blending ratios presented in the two examples and comparative examples.

division Example 1 Example 2 Comparison example Crack resistance No cracking No cracking Constrained dry shrinkage cracking

Proceeding according to the procedure of this test method, but proceeding by visual observation without attaching a strain gauge, and cracking was observed for 56 days in the constant temperature and humidity chamber. As shown in Table 5, the cement concrete pavement composition prepared according to the two examples did not generate cracks, but the comparative example confirmed that constrained dry shrinkage cracking occurred.

Table 6 shows the results of performing the concrete abrasion resistance test according to the method specified in ASTM C 779 "Standard Test Method for Abrasion Resistance of Horizontal Concrete Surfaces" according to the blending ratios presented in the two examples and comparative examples.

division Example 1 Example 2 Comparison example Wear resistance (㎜) 0.67 0.62 1.23

After fixing the test piece, the abrasive blade is rotated for 30 minutes while the abrasive blade is in contact with the concrete surface to measure the depth of wear. On the integral exposed cement concrete pavement, performance of 2.0 mm or less is required as of the 28th age. Referring to Table 6, it can be seen that the cement concrete pavement composition according to the two examples exhibits less wear depth than the comparative example and thus has high resistance to abrasion.

Table 7 shows the results of the concrete compressive strength test according to the method specified in KS F 2405 "Compressive Strength Test Method of Concrete" according to the blending ratios presented in the two examples and comparative examples.

division Example 1 Example 2 Comparison example Compressive strength
(MPa) 28 days of age 32.9 35.4 31.5 56 days of age 41.3 41.2 39.4

The test specimens were fabricated in three sets of slumps of 130 ± 25 mm and air volumes of 6.5 ± 1.5%, respectively, and tested at age 28 and age 56. On the one-piece exposed cement concrete pavement, performance over 30MPa is required on the 28th. Referring to Table 7, it can be seen that the cement concrete pavement composition according to the two examples has a higher compressive strength than the comparative example.

Table 8 shows the results of the length change test by concrete dry shrinkage according to the method specified in KS F 2424 "Mortar and concrete length change test method" according to the mixing ratios presented in the two examples and comparative examples.

division Example 1 Example 2 Comparison example Dry shrinkage (%) -0.0452 -0.0412 -0.0632

Each test specimen was prepared in three sets and tested on the 14th day of age. In the one-piece exposed cement concrete pavement, performance of 0.15 or less based on 14-year-old age is required. Referring to Table 8, it was confirmed that the composition for the cement concrete pavement prepared according to the two examples showed a somewhat similar composition and dry shrinkage (length change rate) according to the comparative example.

Table 9 shows the results of performing the water absorption performance test according to the method specified in KS F 4926 "Watertight admixture for concrete" according to the mixing ratios presented in the two examples and comparative examples.

division Example 1 Example 3 Comparison example Water absorption coefficient 0.55 0.48 1.0

The specimen of the comparative example was used as a reference value and tested in a manner of comparing the specimen of the two examples. Each of 5 sets was prepared and tested by discarding the highest and lowest values and obtaining the average value of the remaining three measurements. The water-tight admixture for concrete requires a performance of 0.7 or less on the 28th age. Referring to Table 9, it can be seen that the mortar excluding the coarse aggregate from the composition for cement concrete pavement prepared in accordance with the two examples was prepared as a specimen, and the water absorption coefficient ratio was measured, thereby confirming the high absorption resistance.

Table 10 shows the results of the water permeability performance test by the method specified in KS F 4926 "Watertight admixture for concrete" according to the blending ratios presented in the two examples and comparative examples.

division Example 1 Example 3 Comparison example Pitcher 0.53 0.45 1.0

The specimens of the comparative examples were used as reference values, and the specimens of the two examples were tested by the comparison method. Each of 5 sets was prepared and tested by discarding the highest and lowest values and obtaining the average value of the remaining three measurements. The water-tight admixture for concrete requires a performance of 0.7 or less on the 28th age. Referring to Table 9, it can be confirmed that the water permeability is high as a result of measuring the water permeation ratio by preparing each mortar excluding the coarse aggregate from the cement concrete pavement composition prepared according to the two examples as a specimen.

1) Reaction of water-repellent composition prevents movement of moisture and harmful ions

2) Calcium carbonate precipitates by reaction of calcium ions (Ca ²⁺ ) and carbonates (CO ₃ ^2- ) of calcium hydroxide (Ca (OH) ² ) produced during cement and hydration on the crack section.

3) In the chemical composition containing pozzolanic material, it is an insoluble compound due to the reaction of SiO ₃ ^{2 -} or AL ₂ O ₄ ^{2 -} and calcium ion (Ca ^{2 +} ) eluted from SiO ₂ and Al ₂ O ₃ , which are highly active components. Calcium silicate production.

FIG. 3 is a photograph of a waterproof composition that is performing a mock-up to confirm self-healing properties.

4) When the pozzolanic material and the water-repellent composition remaining on the cracked section come into contact with water for a long time, the self-healing properties to fill the fine cracks of 0.4 mm inside and outside by rehydration of unreacted materials are as shown in FIG. The mock-up test can also confirm the healing performance.

4 and 5 is a quality test and inspection report card issued by the construction test institute of Korea SGS Co., Ltd. for exposed exposed concrete concrete using PPS concrete powder waterproofing agent prepared according to the present invention.

In the above, the technical idea of the present invention has been described with reference to the accompanying drawings, but this is a preferred embodiment of the present invention and is not intended to limit the present invention. In addition, it is obvious that any person skilled in the art to which the present invention pertains can make various modifications and imitation without departing from the scope of the technical spirit of the present invention.

210: preliminary preparation stage
220: pouring step
230: leveling step
240: surface treatment step
250: curing agent application step

Claims (3)

For 1 part by weight of water,
Cement binder 2.0-3.4 parts by weight;
Fine aggregate 3.4 to 4.8 parts by weight; And
5.7 to 7.1 parts by weight of coarse aggregate; It consists of,
The cement binder,
For 1 part by weight of fly ash,
Portland cement 7.2-8.0 parts by weight;
Blast furnace slag 2.6 to 3.275 parts by weight;
Silica fume 0.125 to 0.625 parts by weight;
Chemical admixture 0.081 ~ 0.168 parts by weight; And
Powder waterproofing material 0.151 ~ 0.49 parts by weight; It consists of,
The powder waterproofing material,
The re-emulsifiable powder resin containing higher fatty acid zinc stearate, lignin sulphonate surfactant and styrene-acrylic copolymer polymer is mixed in a weight ratio of 5.4 to 8.2: 5.1 to 7.7: 1, respectively.
The re-emulsifying powder resin,
Cement concrete pavement composition, characterized in that one of the silane and siloxane and a styrene-acrylic copolymer polymer are mixed in a weight ratio of 1: 6. In claim 1, wherein the chemical admixture,
A high-performance water reducing agent comprising at least one of naphthalene sulfonate-based, melamine formalin resin sulfonate-based, and polycarboxylic acid-based; And
Cement concrete pavement composition, characterized in that it comprises an AE agent comprising at least one of a resin-based, alkyl benzoyl sulfonic acid-based, higher alcohol lactic acid ester-based and non-ionic.
A preliminary preparation step of spraying water on the auxiliary base layer or the upper part of the formwork to keep the bottom surface in a wet state;
A pouring step of pouring the composition for paving the cement concrete according to claim 1 onto the auxiliary base layer or the bottom surface of the formwork, that is, the wet bottom surface;
A flattening step of flattening the surface of the cement concrete pavement composition cast in the pouring step;
A surface treatment step of forming a vertical (or transverse) groove in the vertical or horizontal direction in the traveling direction of the road surface of the flattened exposed pavement surface in the flattening step; And
A curing agent application step of applying a curing agent to the packaging surface surface-treated in the surface treatment step; To
Pavement method of the integrally exposed cement concrete, characterized in that to perform.

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