KR20060131617A - Pavement with water permeability concrete including a granule reproduction aggregate and polymer cement - Google Patents

Abstract

Water permeable concrete pavement by recycling polymer granules is provided to increase rigidity and flexibility of concrete by using belite cement and recycling aggregate, to prevent crack, efflorescence, displacement and bleeding by pre-wetting a rubble layer, and to cut down manufacturing cost by reducing a color layer. A road surface is arranged, and a filter layer and a rubble layer are mounted and compacted. An upper part of the rubble layer is pre-wetted with 10 to 1000 kg per 100 m to prevent moisture absorption of recycled base permeable concrete, and the recycled base permeable concrete layer is arranged and compacted by mixing 25 mm recycled aggregate of 1450 to 2100 kg/m, belite cement of 200 to 400 kg/m, polymer of 1 to 20 % against belite cement, a retarder of 0.1 to 0.5 % against belite cement and water of 20 to 40 % at the ratio of water to belite cement. A polymer granule recycled permeable concrete layer is mounted and dried by mixing 5 mm recycled granule aggregate of 1450 to 2100 kg/m, belite cement of 140 to 280 kg/m, polymer of 1 to 20 % against belite cement, fly ash of 60 to 120 kg/m, a retarder of 0.1 to 0.5 against belite cement, water soluble acryl resin of 1 to 10 % against belite cement, inorganic pigment of 5 to 20 kg per belite cement of 1 m and water of 20 to 40 % at the ratio of water to belite cement. Water soluble epoxy resin is sprayed on the polymer granule recycled permeable concrete layer, and a concrete curing agent of 10 kg/m is distributed and cured by a horizontal joint and a vertical joint. The porosity of concrete is more than 10 %, and the compression strength of concrete is 150 to 300 kg/cm.

Description

Pavement with water permeability concrete including a granule reproduction aggregate and polymer cement}

The present invention relates to a polymer fine-grain recycled high performance permeable concrete pavement, and more specifically, to the permeable concrete layer installed on top of the conventional crusher layer is applied to the bellow cement, polymer, fly ash and hydrocarbon resin-based concrete curing agent The present invention relates to a polymer fine-grain recycled high-performance permeable concrete pavement, thereby increasing the strength of the permeable pavement and preventing various defects.

Conventional permeable concrete pavement is generally paved by laying the hearth, the filter layer, the crusher layer and the permeable concrete layer in order. However, such a conventional permeable concrete pavement takes a long time to pave according to the multi-layer structure, the rate of drying and shrinkage of the pavement increases, causing cracks on the pavement surface, and also whitening, latency, bleeding phenomenon, etc. There was such a problem.

The present invention has been proposed in order to solve the problems of the prior art as described above, the basic purpose of the present invention is low heat of hydration during curing of concrete, applying excellent bellite cement to temperature crack control, by adding a water-soluble acrylic resin In addition, the present invention provides a polymer fine-grain recycled permeable concrete pavement method that can minimize various problems such as cracking, whitening, latencies, and bleeding occurring in existing pavement.

Another object of the present invention is to produce a high-strength and high-flow concrete using bellite cement in order to prevent the decrease in strength in the use of recycled aggregate, and to strengthen the strength by adding fly ash to the surface than conventional permeable concrete To provide high-performance polymer fine-grain recycled pitch concrete pavement.

Another object of the present invention is to pre-wetting to prevent the increase in the rate of drying and shrinkage of the pavement according to the multi-layered pavement structure of the conventional fine-grain permeable concrete thin-layer paving method, the crusher layer is the moisture of the base-permeable concrete It is to prevent the departure and to prevent premature curing of the pitched concrete due to water vaporization.

It is another object of the present invention to provide a polymer granules recycled permeable concrete pavement to prevent cracks and detachment caused by coating the concrete curing agent during curing does not have sufficient curing conditions due to moisture evaporation.

Another object of the present invention is to reduce the time required for the construction, while reducing the cost of reducing the colored layer, by using fine-grain recycled aggregates, economic effect as a replacement effect of aggregate supply shortage and imported aggregates imported from China, Australia, etc. Is of course contributing to the national economy.

In order to achieve the above object, the polymer fine-grain recycled permeable concrete pavement according to the present invention comprises a first step of arranging the roadbed, laying a filter layer, laying a stone crusher layer and the same; In order to prevent water absorption of the recycled base permeable concrete on the upper part of the crusher layer of the first process, prewetting with water of 10 to 1,000 kg per 100 m 2, recycling 25mm aggregate 1450 ~ 2100 kg / ㎥, bellite cement 200 ~ 400 kg / M3, polymer for 1 ~ 20% of bellite cement usage, retardant for 0.1 ~ 0.5% of bellite cement usage, water for water / belite cement ratio 20 ~ 40% And a second step of compacting; Within 90 minutes after completion of compaction of the recycled base permeable concrete layer, fine recycling 5mm aggregate 1450 ~ 2100kg / ㎥, Bellite cement 140 ~ 280kg / ㎥, Polymer is 1 ~ 20% of the use of bellite cement, fly ash 60 ~ 120kg / ㎥, retardant 0.1 ~ 0.5% of bellite cement usage, water-soluble acrylic resin is liquid, 1-10% of bellite cement usage, inorganic pigment 5 ~ 20kg per 1㎥ of bellite cement, water is water / A third step of installing a polymer granules recycled permeable concrete layer by mixing 20% to 40% of bellite cement ratio and drying the same; After the third step, the water-repellent epoxy resin is sprayed on the surface of the polymer fine-grain recycled pitched concrete layer, and the fourth step of spraying, curing and packing the concrete curing agent 10 kg / m 2 using horizontal lines and vertical lines. It features.

Hereinafter, the present invention will be described in more detail.

First, the bellite cement used in the present invention is a low heat cement capable of suppressing temperature cracking due to hydration heat, and has properties of high intrinsic and high strength for improving workability. These bellite cements can be regarded as cements made in anticipation of properties such as low hydration heat by increasing the bellite (C ₂ S) content and reducing the aluminate (C ₃ A) in the basic composition of portland cement. Good dispersion effect, which improves fluidity, reduces the temperature rise of concrete due to the initial heat of hydration, and has many advantages that greatly increase the strength in long-term age.

Fly ash is a cement admixture that is mixed when manufacturing cement mortar. Fly ash particles are mostly spherical, and act as ball-bearing at the contact surface with aggregates when mixing concrete. By reducing the frictional resistance, the workability of concrete is improved and increased, and the unit quantity and water cement cost are also reduced. In addition, the cement ferrite mixed with the fly ash is a lot of ettringite is generated concrete concrete structure can be obtained the effect of increasing the strength.

The curing agent used in the present invention is a hydro carbon resin-based resin film on the concrete surface to block water evaporation to promote hydration, to prevent shrinkage and cracking, to increase curing by increasing the strength.

Polymer fine-grain recycled permeable concrete pavement according to the present invention using the above-mentioned materials is relatively coarse recycled aggregate, bellite cement and polymer permeable recycled base material on top of the crusher layer laid on the top of the roadbed and the filter layer. A layer was installed, and a polymer fine-grain recycled permeable concrete layer using fine-grain recycled aggregate, bellite cement, polymer, and fly ash was placed on top of the permeable concrete layer for recycled base, and then sprayed with water-soluble epoxy resin and concrete curing agent. By curing.

First process: preparation process

As in a conventional permeable pavement, it is a process of arranging a roadbed, laying a filter layer, laying a crusher layer, and compacting it.

The filter layer is mainly formed of sand, and this filter layer has a permeability coefficient of 10 × 10 ^-4 cm / sec or more to prevent the soil from entering the base layer and to purify contaminated rainwater. It is desirable to be able to.

The crusher layer is laid in order to distribute the load of the upper part in the lower part, and the permeability coefficient of the crusher layer is preferably 10 × 10 ^-2 cm / sec or more and sufficiently compacted to achieve the optimum density at the optimum function ratio after the installation. .

Process 2: Pitcher for Recycling Bases Concrete floor  Forming process

The second step is a process of laying and compacting high performance permeable concrete for recycling base after prewetting the upper part of the crusher layer.

10kg ~ 1,000kg per 100m2 of the crusher layer according to the change of temperature at the time of packing on the upper part of the crusher layer before installing the recycled base permeable concrete layer in order to prevent the increase of dry shrinkage due to the long time required for the paving according to the multilayer structure. By spraying the water (pre-wetting), the crusher layer prevents moisture escape of the high performance permeable concrete of the base, and prevents premature curing of the permeable concrete due to evaporation of moisture of the permeable concrete layer for recycling base. In laying and compacting the permeable concrete layer for recycled base, the porosity should be more than 10%, the permeability coefficient more than 10 × 10 ^-2 cm / sec, and the strength should be more than 180kg / cm2 based on the compressive strength.

At this time, the permeable concrete layer for recycle base is mixed with recycled aggregate less than 25mm, bellite cement, polymer, water and retardant, and recycled aggregate is # 57, # 67, # 78 according to Korean Industrial Standard (KS). Aggregate is used and 1450 ~ 2100Kg per 1㎥, bellite cement amount is 200 ~ 400kg per 1㎥, water is 20 to 40% of the use of bellite cement, polymer is 1 Use up to ~ 20%, and use cement retardants from 0.1 to 0.5% of the amount of bellite cement used to minimize cracking and premature curing due to overuse of cement.

The blending ratio of the bellite cement, water, polymer, and retarder is an optimal condition for realizing the present invention, and if the blending ratio is changed, the compressive strength, porosity, and permeability coefficient of the product are lowered. Matching is the most important technique of the present invention.

3rd process: Polymer  Fine-grain recycled pitcher Concrete floor  Forming process

After the compaction of the recycled base-permeable concrete of the second process, the fine-grain recycled 5mm aggregate, bellite cement, water, fly ash, pigment, retardant, water-soluble acrylic resin, etc. It is the process of compacting, curing and drying.

The polymer fine-grain recycled permeable concrete layer should be installed within 90 minutes after the compaction of the recycled base permeable concrete of the second process is completed, in order to strengthen the adhesion between the layers. The polymer fine-grain recycled permeable concrete layer should be compacted to have a porosity of 10% or more, a permeability coefficient of 10 × 10 ^-3 cm / sec or more, and a compressive strength of 150 to 300kg / cm 2. The polymer fine-grain recycled permeable concrete is filled between the concrete pores. The permeable concrete for the recycled base is also cement-based, so as to absorb the water-soluble acrylic resin contained in the polymer fine-grain recycled permeable concrete, thereby achieving perfect adhesion between the layers.

In order to make the polymer fine-grain recycled permeable concrete layer have a porosity of 10% or more, a permeability coefficient of 10 × 10 ^-3 cm / sec or more, and a compressive strength of 150 to 300kg / ㎠, bellite cement 140 to 280kg / ㎥, fly ash 60 to 120kg / ㎥, polymer is determined in the range of 1 ~ 20% of the use of bellite cement, water / bellite cement ratio 20 ~ 40% in consideration of the permeability coefficient, and the use of fine-grain recycled 5mm aggregate is 1450 ~ 2100kg / It should be determined in the range of m3.

The fine-grain recycled aggregate 5mm, the absorption rate, specific gravity, abrasion rate and particle shape determination performance rate using recycled aggregate in accordance with the Korean Industrial Standard (KS) Type 1 recycled aggregate quality standards, reducing dry shrinkage, volume expansion, suppression of hydration heat, Polymers are added to minimize surface wear and whitening.

At this time, the KS Type 1 recycled aggregate quality standard is shown in Table 1 below.

Grade 1 Recycled Aggregate Quality Standard Absorption rate (%) importance Wear rate (%) Particle shape determination performance rate (%) 3 or less 2.2 or higher 40 or less 55 or more

In addition, the quality of the bellite cement and fly ash used in the present invention are shown in Table 2 and Table 3 below.

division Chemical component (%) Mineral water composition (%) SiO ₂ Al ₂ O ₃ Fe ₂ O ₃ CaO MgO SO ₃ Ig.loss C ₃ S C ₂ S C ₃ A C ₄ AF Bellite cement 24.5 3.7 3.6 62.0 1.3 2.5 1.8 37 45 3 9

division Chemical component (%) Property SiO ₂ Al ₂ O ₃ Fe ₂ O ₃ CaO MgO SO ₃ Ig.loss importance Specific surface area (㎠ / g) Fly ash 57.07 24.66 10.50 2.58 1.37 0.94 3.02 2.10 4,350

The water-soluble acrylic resin is used to reduce the whitening phenomenon of the conventional permeable concrete, as well as to reduce the latency and bleeding phenomenon, and the workability according to the application within the range of 1 ~ 10% of the amount of bellite cement used as a liquid ( The quantity is determined and injected in consideration of the workability, the degree of easy and difficult work and the resistance to the separation of materials.

In addition, a cement retardant may be used in consideration of transportation time, laying time, and compaction time, and the amount of the cement retardant should not exceed 0.1 to 0.5% of the weight of the bellite cement. This excellent inorganic pigment should be used, and it is preferable to use the amount within 20% of the bell weight cement weight.

4th process: Curing Process

After the third process, the surface of the polymer fine-grain recycled pitched concrete is sufficiently sprayed with a water-soluble epoxy resin, forming a horizontal line eye and a vertical line eye, and then curing by spraying a concrete curing agent to complete the packaging.

The water-soluble epoxy resin is to be sprayed for surface reinforcement, the curing agent is a hydro carbon resin-based resin film on the concrete surface to block moisture evaporation to promote hydration, prevent shrinkage and cracking, increase curing, increase strength give.

The curing agent is a transparent white, has a specific gravity of 0.85, and is applied by spraying 10Kg / ㎡ using a sprayer, at the same time the laying and compacting of fine-grain recycled permeable concrete layer is applied. Spray gun nozzles should be sprayed at a distance of 50 cm from the spray surface.

When cured, polymer fine-grain recycled permeable concrete having a porosity of 10% or more, a permeability coefficient of 10 × 10 ⁻³ cm / sec or more, and a compressive strength of 150 to 300 kg / cm 2 is completed.

Hereinafter, the present invention will be described through preferred embodiments.

EXAMPLE

In installing 100m2 of parking lot in red polymer fine-grain recycled permeable concrete pavement, it is 5cm filter layer, 15cm crusher layer, 9cm permeable concrete layer for recycled base material with compressive strength of more than 210kg / ㎠ Packed in 1cm layer, the permeability should be 10 × 10 ^-3 cm / sec or more and porosity 10% or more.

The process carried out in this embodiment is as follows.

1st process: Repair the roadbed, install sand with a permeability coefficient of 10 × 10 ^-3 cm / sec at 5m3, compact it with 8 times rollers, have a concrete reference strength of C40 (400kg / ㎠), and permeability coefficient of 10 × 10 ^-2 Crusher base material of more than cm / sec is laid in 15㎥ and compacted into roller 8 times with maximum density according to the optimum function ratio.

Second process: after pre-wetting 200kg of water per 100m2 on the crusher layer to prevent moisture escape, which is the main factor of drying shrinkage, to the installed recycled base permeable concrete, the permeable concrete layer for recycled base is laid and then The roller is compacted so as to have a coefficient of 10 × 10 ⁻² cm / sec or more, a porosity of 10% or more, and a strength of 210 kg / cm 2 or more.

At this time, the recycled concrete base permeable concrete layer No. 67 recycling 25mm aggregate 1680kg / ㎥, bellite cement 320kg / ㎥, polymer 32kg / ㎥, water 120kg / ㎥, retardant 0.96kg / ㎥ mixed and laid.

Third step: After the compaction of the recycled base permeable concrete, polymer fine-grain recycled permeable concrete was installed within 90 minutes.

At this time, the polymer fine-grain recycled pitch concrete uses 5mm aggregate recycling 1625kg / ㎥, Bellite cement 370kg / ㎥, Polymer 37kg / ㎥, fly ash 100kg / ㎥, water 150kg / ㎥, retardant 1.11kg / ㎥, water-soluble 7.5 kg of an acrylic resin liquid was used, and a red inorganic pigment 11.1 kg / m 3 was used as the pigment. The polymer fine-grain recycled permeable concrete mixed by mixing the materials is laid on the recycled permeable concrete by manpower, and then compacted and covered with vinyl and a curing cloth to prevent moisture evaporation.

Fourth step: After spraying the water-soluble epoxy resin on the surface in accordance with the conventional method, and after curing the horizontal line and vertical line eyes were installed by spraying 10kg of concrete curing agent and cured to complete the polymer fine-grain recycled concrete packaging.

Test results for the finished polymer fine-grain recycled permeable concrete pavement are shown in Table 4 below.

division Item Strength (compression) (kg / ㎠) Porosity (%) Permeability coefficient (cm / sec) color Pitched Concrete Floor for Recycle Base Check 290 16 2.01 × 10 ^-1 - standard 210 or more over 10 1 × 10 ^-1 - Polymer Granules Recycled Pitched Concrete Floor Check 246 12 8.2 × 10 ^-1 Red standard 210 or more 7 or more 10 × 10 ^-2 Limit Sample

As seen from above, the polymer fine-grain recycled permeable concrete pavement according to the present invention exhibits more than the standard in compressive strength, porosity, permeability coefficient, color, and the surface is very beautiful, so the aesthetic appearance is very beautiful. In addition, in the case of coloring, only the polymer fine-grain recycled concrete layer, which is the surface layer, needs to be colored, thereby minimizing the cost of construction work. have.

In addition, by applying the bellite cement to the present invention, there is an advantage that the increase in strength in the long-term age is greatly expressed by reducing the temperature rise of the concrete due to the initial heat of hydration, and the concrete structure becomes watertight by applying the fly ash. The effect can be obtained.

In addition, by using a hydrocarbon resin-based concrete curing agent to form a resin film on the concrete surface, water evaporation can be blocked during curing to promote hydration, prevent shrinkage and cracking, and increase curing to increase strength. .

Therefore, the present invention can be applied at low cost anywhere in roads, sidewalks, bicycle paths and parking lots.

Claims (1)

In pitched concrete pavement, A first step of arranging the roadbed, laying a filter layer, laying a stone crusher layer, and pitting it; In order to prevent water absorption of the recycled base permeable concrete on the upper part of the crusher layer of the first process, prewetting with water of 10 to 1,000 kg per 100 m 2, recycling 25mm aggregate 1450 ~ 2100 kg / ㎥, bellite cement 200 ~ 400 kg / M3, polymer for 1 ~ 20% of bellite cement usage, retardant for 0.1 ~ 0.5% of bellite cement usage, water for water / belite cement ratio 20 ~ 40% And a second step of compacting; Within 90 minutes after completion of compaction of the recycled base permeable concrete layer, fine recycling 5mm aggregate 1450 ~ 2100kg / ㎥, Bellite cement 140 ~ 280kg / ㎥, Polymer is 1 ~ 20% of the use of bellite cement, fly ash 60 ~ 120kg / ㎥, retardant 0.1 ~ 0.5% of bellite cement usage, water-soluble acrylic resin is liquid, 1-10% of bellite cement usage, inorganic pigment 5 ~ 20kg per 1㎥ of bellite cement, water is water / A third step of installing a polymer granules recycled permeable concrete layer by mixing 20% to 40% of bellite cement ratio and drying the same; After the third step, the water-repellent epoxy resin is sprayed on the surface of the polymer fine-grain recycled pitched concrete layer, and the fourth step of spraying, curing and packing the concrete curing agent 10 kg / m 2 using horizontal lines and vertical lines. Features polymer fine grain recycled pitched concrete pavement.