KR19980066436A - High strength pitched concrete - Google Patents

Abstract

Disclosed is a high strength permeable concrete having improved water permeability and high strength. The permeable concrete ensures permeability by removing the fine powder particles of aggregates and secures permeability, and increases permeability and strength by mixing SBR latex or VAE emulsion, and improves steel fiber, glass fiber, carbon fiber, aramid fiber and Super high strength is ensured by mixing natural fibers.

Description

High strength pitched concrete

The present invention relates to permeable concrete permeable concrete, and more particularly to permeable concrete suitable for pavement of highways and heavy vehicle passing areas as well as general roads.

As shown in Fig. 1, the road pavement adopts asphalt concrete pavement and cement concrete pavement, which are impermeable. However, such impermeable pavements are not only obstacles to road traffic because rain water remains on the road during rainfall, and also increases the risk of accidents due to slip resistance during braking of the vehicle. In addition, rainwater may not be penetrated into the basement, causing flooding of the river, depleting the groundwater, and microorganisms inhabiting the soil.

To this end, permeable asphalt concrete has been developed and put into practical use in plazas, parking lots, etc., but this is not applicable to general roads as the road surface is deformed in summer and the permeability is closed due to the viscosity of asphalt.

The permeable concrete for solving the problems of the permeable asphalt concrete is shown in FIG. It has a structure in which the rudder layer 3, the auxiliary base layer 2 and the permeable concrete layer 1 are sequentially stacked on the hearth 4. Normally, natural sand is generally used for the lubricating layer 3, and the auxiliary base layer 2 is required to have a bearing capacity and durability, and thus, a material having a small change in its properties due to changes in water content and freezing / melting is used.

And permeable concrete (1) is directly exposed to severe environmental conditions such as lubrication load, meteorological action, and abrasion effect, so the materials used should be thoroughly investigated / tested before construction. Cement, aggregate (grain aggregate, coarse aggregate), water, and mixed materials Use a blended material in an appropriate ratio.

The permeable concrete 1 manages the slump value close to zero by using less aggregates, and the cement paste is filled in a part of the space part while keeping the aggregate surface thinly wrapped to maintain the adhesive strength. At this time, a permeation hole without filling the paste is formed according to the size of the space portion, and if the fine permeation hole is made continuously, the permeation is made by securing the continuous porosity.

However, such a permeable concrete layer (1) has the following problems.

First, the compressive strength is less than 300 kg / ㎠ because the mixing design is made of a low aggregate aggregate of less than about 12% to have a continuous porosity to secure a high permeability coefficient of 1.0 × 10 ^-2 cm / sec.

Second, by using less aggregate aggregate, when a large amount of cement is used to increase the strength or when the fluidity of the cement paste is large, the cement paste flows into the gap between the aggregate and the aggregate to fill the pores of the lower layer. This lowers and the concrete strength of the upper layer is lowered.

Third, because of the use of less aggregate aggregate, when there is some slump in the process of construction, the aggregate aggregate has a lower permeability and the upper layer has a significantly lower strength, leaving only a thick aggregate.

Fourth, since the sluff value is concrete close to zero, it cannot be constructed like ordinary concrete, and is used only for pavement such as bicycle roads because it is constructed by mechanized compaction.

Fifth, there is a problem in securing strength (particularly, durability against freezing and melting) due to excessive strength of unnecessary independent porosity not related to permeability.

Sixth, since the surface is rough and the strength is small, peeling of the surface appears and fine dust is attached to the rough pores so that the water permeability is sharply lowered, and the maintenance cost is excessively consumed.

Seventh, when the surface treatment reinforcing agent (acrylic agent or epoxy agent) is used to increase the strength of the surface, there is a phenomenon in which the water permeability of the surface is drastically reduced, and when the pigment is used for coloring, the strength is sharply decreased. Phenomenon appears.

Eighth, the pavement concrete with fine-grain permeable concrete is deteriorated due to the economical deterioration due to double laying, the strength degradation at the adhesive surface between the thin layer and the lower layer, and the unreasonable phenomenon resulting from the difference of the different permeability coefficients. Phenomenon appears.

The present invention has been made to solve the above problems, has the following object.

First, when used for sidewalks and road pavement, it is possible to evaporate water on the dryer after the rainwater is poured on the road, supply natural water to roadside trees, thereby preventing flooding of public waters, urban rivers, rivers, etc. It is possible to provide improved permeable concrete to prevent damage caused by lowering the groundwater level in the city.

Second, because water does not flow on the road, it is convenient for traffic and increases the sliding resistance, which reduces the risk of car accidents, eliminates visual impairment caused by diffuse reflections, and has a sound absorption effect to significantly reduce the noise caused by traffic. To provide improved pitched concrete.

Third, it is to provide improved pitched concrete that is less affected by oil and has a small amount of pigment, so that the desired color can be obtained at a low production price.

Fourth, even if the auxiliary base is damaged can be maintained by securing the bending strength of the concrete, and to provide an improved permeable concrete to produce a concrete batch plant during production.

Fifth, the present invention provides permeable concrete with high compressive strength and flexural strength so that it can be used for pavement in general roads, highways and heavy vehicles.

Sixthly, some slump value is acceptable, so that the quality control is easy at the time of construction, and to provide improved permeable concrete to promote quality improvement.

Seventh, to provide a permeable concrete that is improved so that the surface is not rough and less surface peeling phenomenon by securing the required fine aggregate ratio.

Eighth, it is to provide a permeable concrete with improved durability by freezing / thawing by securing the required fine aggregate ratio.

Ninth, the present invention provides permeable concrete with an extended lifetime by removing unnecessary independent porosity and minimizing continuous porosity.

Tenth, the present invention provides a pitched concrete having less dust and less maintenance costs because the surface is not rough.

Eleventh, surface treatment enhancers are unnecessary to provide more economically permeable concrete.

Twelfth, there is no need for the uneconomical double laying required for thin-walled pavement, and the unreasonable problem resulting from the difference of different permeability coefficients is to provide the permeable concrete.

Thirteenth, to provide a permeable concrete that can be used for soundproof wall (soundproof wall) surface landscaping materials or offshore structures because the surface is not rough and beautiful.

Fourteenth, to provide a permeable concrete improved to be used for road pavement in areas that can not be constrained by the limited transport time and distance because the setting time can be adjusted.

1 is a cross-sectional view of a conventional coating packaging.

2 is a cross-sectional view showing a general packaging and the present invention packaging

3 is a process chart of the present invention permeable concrete.

The present invention to achieve the above object in the permeable concrete formed by mixing cement, water, aggregate and admixture in a predetermined ratio,

It is characterized in that the continuous porosity is secured by removing the fine powder particles of the aggregate.

In addition, SBR latex or VAE emulsion is used to increase permeability and high strength, and steel fiber, glass fiber, carbon fiber, aramid fiber and natural fiber are mixed to secure ultra high strength.

According to the characteristics of the present invention, the water-permeable concrete of the present invention has the permeability to secure the continuous porosity by removing the powder particles of the aggregate and can improve the setting time and strength by the adoption of SBR latex or VAE emulsion.

In addition, steel fibers, glass fibers, carbon fibers, aramid fibers and natural fibers are incorporated to secure ultra high strength.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the permeable concrete 11 according to the present invention, as shown in FIG. 2, the filter layer 3 and the auxiliary base layer 2 are laminated on the hearth 4 and poured on top thereof. As for the water-permeable concrete 11, cement, water, admixture, and aggregate are mixed in an appropriate ratio as usual.

Here, as a characteristic configuration of the present invention, the fine powder particles are removed from the aggregate, and the admixture is foamed even in the polymer system to increase the strength, and SBR (Styrene butadiene rubber) latex or VAE (which can control the setting time) Vinyl Acetate Ethylene) emulsion is employed.

In addition, steel fibers, glass fibers, carbon fibers, aramid fibers and natural fibers are mixed to secure ultra high strength.

As permeable concrete 11 according to the present invention, as shown in Figure 3, after removing the fine particles (filter powder) that is the permeability of the fine aggregate (sand) after mixing the SBR latex or VAE emulsion as a mixed material, After mixing steel fiber, glass fiber, carbon fiber, aramid fiber and natural fiber, and finished with coarse cement aggregate and the appropriate amount of water is prepared.

Permeable concrete according to the present invention is to remove the fine powder particles of the aggregate to ensure the continuous porosity secured specificity and to increase the permeability and strength by mixing SBR latex or VAE emulsion, steel fiber, glass fiber, carbon fiber, aramid fiber And ultra-high strength is secured by incorporating natural fibers and the like, and has the following advantages.

First, when used for paving sidewalks and pavements, it is possible to evaporate water on the dryer after pouring rainwater on the road, supply natural water to roadside trees, thereby preventing flooding of public rivers, urban rivers, etc. The damage caused by the lowering of the groundwater level can be prevented.

Second, because water does not flow on the road, traffic is convenient and the sliding resistance can be increased to reduce the risk of car accidents, to eliminate visual impairment caused by diffuse reflections, and the sound absorption effect can eliminate the noise caused by traffic. .

Third, because the concrete is less affected by the oil and the original color of the concrete is off-white, the desired color can be obtained at a low cost by a small amount of pigment.

Fourth, even if the auxiliary base is damaged can be maintained somewhat by securing the bending strength of the concrete, can be produced in the concrete batch plant during production.

Fifth, because of the high compressive strength and flexural strength, it can be used for pavement of highways and heavy vehicle passing areas as well as general roads.

Sixth, the quality control is easy at the time of construction because it allows a little slump, and the excellent quality can be secured.

Seventh, the surface roughness and less surface peeling phenomenon occurs by securing the required fine aggregate ratio.

Eighth, durability by freeze-thawing is excellent by securing required aggregate aggregate rate.

Ninth, service life is extended by eliminating unnecessary independent porosities and minimizing continuous porosities.

Tenth, because the surface is not rough, there is less dust and maintenance costs are reduced.

Eleventh, the surface treatment enhancer becomes unnecessary and becomes more economical.

Twelfth, the uneconomic double laying required for thin-walled pavement of fine grains becomes unnecessary, and the irrationality that comes from the difference of different permeability coefficients is eliminated.

Thirteenth, a soundproof wall (soundproof wall) surface landscaping material, or offshore structure, can also be used because the surface is not rough and beautiful.

Fourteenth, the setting time can be adjusted so that it can be used for pavement in areas where construction is not possible due to restrictions in transport time and distance.

Fifteenth, it can secure ultra high strength and can be used in any place such as aerodrome.

Claims (3)

In the permeable concrete formed by mixing cement, water, aggregate and admixture in a predetermined ratio, Permeable concrete, characterized in that it lacks fine powder particles of the aggregate. The high strength water-permeable concrete according to claim 1, wherein the admixture is at least one of an SBR latex or a VAE emulsion. 3. The super high strength water-permeable concrete according to claim 1 or 2, wherein the mixed material is at least one of steel fiber, glass fiber, carbon fiber, aramid fiber and natural fiber.