KR100217946B1 - Porous concrete construction method - Google Patents

Abstract

The present invention is to provide a method for constructing colored permeable concrete with an excellent permeability, drainage and high strength, suppression of surface cracks, emphasizing the space-time pieces, simplifying the particle size of the aggregate to 3 ~ 5mm, and for this aggregate and cement A mixture of glass fibers 2kg / ㎥ is made of a permeable concrete composition, and the perforated pipe (6) wrapped in the ground filter (3) by arranging the valleys at intervals of 5 to 10 m along the horizontal and longitudinal directions on the ground (4) arranged in a flat manner. Put the crushed stone (5) on the ground (4), including the perforated pipe (6) and lay the concrete (1) on it, but the grid (2) is embedded therein.

Description

Pitcher Concrete Construction Method {POROUS CONCRETE CONSTRUCTION METHOD}

The present invention is excellent in permeability and drainage, high strength is suppressed surface cracking, and relates to a colored permeable concrete construction method focusing on easy construction.

The maximum particle size of the aggregate that can be used for concrete is 13 mm. This aggregate is large for aggregate. Concrete using such aggregates has a rough surface and low strength. On the other hand, when concrete is constructed from fine aggregates, the strength is increased and the surface of the concrete is smooth, but the air permeability is reduced and the permeability is lowered. In this regard, the proper selection of aggregate particle size is important when constructing permeable concrete, and cement mixing ratio is important. However, this method may be suitable for general cement concrete, but not for permeable concrete. Pitched concrete uses little aggregate, so the surface area of the aggregate is relatively small, and therefore less cement is required than general concrete.

On the other hand, since the reinforcement of the general metal system could not be used due to oxidation due to the permeability, even if a defect was found in the permeable concrete construction layer, the reinforcement work was not considered even if the reinforcement work had no effect. Reinforcement with expensive stainless steel plate is inevitable to increase the construction cost.

However, considering the characteristics of permeable concrete, reinforcement work for deflection of tensile stress is necessary.

Pitched concrete has a main purpose to allow rainwater to pass through and temporarily drain water in the pavement layer, including roadbeds, to gradually penetrate into the ground, and to achieve natural treatment by evaporation. The problem is that if the rainwater circulation is delayed depending on the weather and the conditions of the road, the ground becomes soft, especially during the winter season, which is likely to freeze the ground, resulting in uplift of the road surface. It will develop even further. In addition, irregular ridges and ground subsidence due to thawing can cause pavement cracks, which greatly affect the permeable concrete layer.

In addition, conventional permeable concrete is monochromatic, so there is no monotonous pair. In order to compensate for this, there is a tendency to give a pattern, but there is a tendency to be reluctant to give a pattern as another problem of rising construction cost arises.

The present invention proposes a permeable concrete construction method that can improve the permeability of the conventional permeable concrete as described above to improve the permeability and drainage and suppress surface cracks, diversification of colors, and time-space composition.

The present invention simplifies the particle size of the aggregate, and the glass fiber is mixed with the aggregate and the cement in a proportion to the permeable concrete composition, and the ground is horizontally and vertically along the ground adjusted to be high in the center and low toward the edge. A perforated concrete construction method is provided by arranging perforated pipes wrapped with underground filters at predetermined intervals, laying rubble on the ground including the perforated pipes, and laying concrete thereon, and installing grids between the thicknesses.

Hereinafter, the construction method of this invention is demonstrated concretely.

The particle size of the aggregate for permeable concrete is simplified to 3 to 5 mm. The aggregate and cement are mixed with 2 kg / m 3 of glass fiber to form a permeable concrete composition.

The ground (4) is arranged inclined from the center to the edge, and the perforated pipe (6) surrounded by the underground filter (3) is laid in a valley every 5-10 m intervals along the transverse and longitudinal directions. The underground filter 3 is also called a gio filter.

Crushed stone 5 is laid on the ground 4 including the perforated pipe 6 to form a crushed stone layer, and the concrete 1 is laid thereon.

Concrete 1 is laid twice. In other words, the concrete corresponding to two-thirds of the total laying thickness is laid first, the grid 2 is installed thereon, and the remaining one-third thick concrete is even laid. The joint 7 is then numbered. The joint may be replaced by embedding the grid.

Finally, colored epoxy resin paint is applied to the surface of the concrete 1 by spraying to give a pattern.

In this way, as the particle size of the aggregate is simplified, the porosity is high, and the permeability is as high as α × 10 ⁻¹ cm / sec. In addition, since the surface area of the aggregate is small, cement is also reduced, and the unit quantity is also proportionally reduced, so that the mixing ratio of water and cement is lowered, thereby increasing the strength.

In the present invention, the result of reducing the water / cement ratio, that is, the W / C ratio and the concrete strength by simplifying the particle size of the aggregate is shown below.

Aggregate is in saturated state with dry surface.

As 2kg / ㎥ of glass fiber was mixed, surface cracks increased by 61%, compressive strength by 7%, and tensile strength by 20%. In addition, the price is cheaper than conventional pitched concrete. In addition, the concrete layer has the same shrinkage and expansion rate as that of concrete, and the strength of the concrete layer is further increased as a grid having chemical resistance is embedded.

By coating the surface of the concrete with colored epoxy resin paint, various patterns can be expressed, and thus, a beautiful aesthetic with the previously monotonous concrete construction surface can be impressed.

In addition, by constructing the underground filter wrapped around the perforated pipe, the ground filter is reduced, the cost reduction effect, and the convenience of construction are also provided, compared to those widely laid on the crushed stone layer.

Missing technical challenges for invention

1 is a cross-sectional view of the permeable concrete construction layer according to the present invention

<Description of the symbols for the main parts of the drawings>

1: concrete 2: grid

3: ground filter 4: ground

5: crushed stone 6: perforated pipe

7: joint

Missing configuration and action of the invention

Missing Effect of Invention

Claims (1)

The particle size of the aggregate is simplified to 3 to 5 mm, and the aggregate and cement are mixed with 2 kg / m 3 of glass fiber as a permeable concrete composition. The flat surface 4 is spaced 5 to 10 m in the horizontal and longitudinal directions. In each groove, the perforated pipe (6) wrapped with the underground filter (3) is laid down, and the crushed stone (5) is laid on the ground (4) including the perforated pipe (6), and the concrete (1) is laid thereon, with the grid (2) Permeable concrete construction method characterized in that the buried).