KR20050079159A - Method of contracing of subgrade for elastic pavement thereon - Google Patents

Abstract

The present invention relates to a method of forming a ground layer for the composition of the elastic urethane layer. In order to form an elastic urethane layer on the top, a stable ground layer is required at the bottom, and the ground layer is composed of a binder layer, a pile for fixing the binder layer in the ground, and a net included in the binder layer.

Description

Ground layer construction method for elastic paving {METHOD OF CONTRACING OF SUBGRADE FOR ELASTIC PAVEMENT THEREON}

The present invention relates to a method of forming a ground layer of an elastic pavement layer, and more particularly to a novel method of forming a ground layer to stably support the urethane layer of the elastic pavement layer.

Despite the fact that waste polyurethane and waste tires, which are the main raw materials for shoe soles, refrigerator parts, and vehicle parts, which are composed of high-grade synthetic rubbers, which have annual emissions of tens of millions of industrial wastes, are mostly recycled, Due to restrictions such as marketability and economic feasibility, such as incineration or landfilling, it has been treated without showing any useful value. Considerable efforts have been made to recycle such waste tires or waste polyurethanes, one of which is to recycle such waste tires or waste polyurethanes into elastic packaging materials.

Conventional paving materials such as sidewalks, bicycle paths, park trails, and athletic roads have used concrete mixed with stone and cement, which are inorganic materials, or some color cones, pitcher cones, and asphalt concrete. However, among these, the concrete molded products have high strength and have a large impact on the ground, and concrete sidewalk blocks and color cones have weaknesses such as high hardness, heat resistance and weather resistance, but are easily damaged even by a weak impact. There was a problem that the feeling of walking is hard and the shock absorption is poor.

As a means to solve this problem, elastic packaging materials including waste polyurethane or waste tires and methods for constructing the same have been developed, and are already known. A method for enhancing the utilization of elastic packaging materials containing waste polyurethane or waste tire has been proposed. Korean patent application No. 10-2002-0010320 provides a feeling of elasticity when walking using waste polyurethane and emits phosphorescence. The present invention discloses a packaging material and a method of manufacturing the same, which provide a clear view to pedestrians and drivers even in dark nights or rainy days without light by significantly reducing the risk of safety accidents. In addition, Korean Utility Model Application No. 20-2003-0022152 discloses a method of additionally including a functional material such as charcoal in the packaging material.

Such elastic packaging material has been constructed by the field installation type elastic packaging method. More specifically, urethane and urethane chips are mixed with an elastic material and the upper part is arranged with a trowel or packed with a roller. After cleaning the surface layer or heating the trowel or roller to clean the surface layer. In this case, in order to prevent ground subsidence, it is common to open the lower ground layer first, and a method of making the ground layer with a concrete layer has been mainly used. Republic of Korea Patent Application No. 10-2003-0030141 and Republic of Korea Patent Application No. 10-2002-0066221 describes in detail the method of constructing the elastic packaging material on the concrete ground layer.

Korean Patent Application Nos. 2002-10319 and 2002-10320 propose ways to solve the ground subsidence problem that can occur without concrete pre-construction without concrete pre-construction. The invention is flattened by crushing the factory, and after the primer is installed, the waste tire rubber chip 10-30 (grain) (gravel) with average particle diameter of 6-10mm and ground to 70-80 parts by weight and 4-8 mm particle diameter To prepare a lower ground layer material mainly composed of parts by weight and an upper elastic layer material mainly composed of waste urethane color rubber chips cut to a length of 3-4 mm, and to place the lower ground layer material and to harden the lower ground layer material. A method of constructing a water-permeable elastic packaging material, characterized in that the upper elastic layer material is poured before or immediately after.

However, while using new materials other than stone or concrete, there is a continuing demand for a new type of lower ground layer construction method that can form a stable support base.

An object of the present invention is to provide a method for constructing a novel ground layer for elastic packaging.

It is still another object of the present invention to provide a novel ground layer construction method comprising a support pile, a support net, and a binder layer for elastic packaging.

Geotechnical construction method to achieve the above object

Pavement stage;

Constructing a support pipe on the packaging surface;

Constructing a support net on the packaging surface; And

A binder is filled in the support pipe, and a binder layer is disposed to cover the support net;

Wherein the binder is polyethylene, polypropylene, polystyrene, styrene-acrylonitrile-butadiene terpolymer (hereinafter referred to as ABS resin), acrylic resin, silicone polymer, fluororesin, polyvinylchloride, polyvinylacetate, polycarbonate, polyurethane and these It is characterized in that it is selected from the group consisting of a mixture of.

1) Pavement Clearance Step

In the present invention, the step of arranging the pavement surface should ensure the flatness to facilitate the installation of the ground layer thereon in the next step, it is possible to use a conventional planarization method using a roller or the like, there is no particular limitation.

2) Construction stage for supporting pipe

In the present invention, the support pipe is for supporting the binder layer from below. In order to construct the support pipe, a step of drilling a pile hole in a pavement surface is necessary. The pile hole can be excavated while digging the contents in the pile hole using a conventional excavator. There is no particular limitation on the excavator and the excavation method. The pile hole is preferably provided at a substantially right angle so that a pipe to be installed later supports the binder layer.

The next step is to construct the support pipe. Since the pavement surface on which the pile holes are made may be soil that can be easily excavated by a conventional excavator rather than a solid ground, it is preferable to install a support pipe so that the pile holes are not collapsed by the upper pressure. It is preferable that the support pipe has an outer diameter substantially the same as that of the pile hole so that a space is generated between the pipe outer surface and the pile hole when the pipe is fitted into the pile hole. In addition, the pipe is substantially shorter than the length of the pile hole, the lower end of the pipe is preferably separated from the bottom surface of the pile hole. In this case, when the binder layer is later filled and cured, the binder layer is hung on the lower end of the pipe to obtain an effect of preventing separation of the binder layer from the pipe. Preferably, the pipe is preferably installed so that the upper surface is matched to the packaging surface. Optionally in one embodiment of the invention, the pipe may be installed in connection with the network. In order to connect the pipe and the network, a connection mechanism such as a connecting ring may be installed on the upper end of the pipe, and a person skilled in the art may easily configure it. In one embodiment of the invention, the side of the pipe is perforated, when the ground packaging material is filled and hardened, the effect of preventing the binder layer from being separated into the pipe by being caught in the hole in the side of the pipe You can also get

3) Construction stage of support net

The ground layer may include a net in the binder layer in order to more stably support the elastic packaging layer. The net is installed after the support pipe is installed and before the binder layer is laid. The network may use a conventional network structure, and in one embodiment of the invention, may be used in a square or rhombus. In one embodiment of the invention, the network may be installed connected to or separated from the pipe.

It is preferable to use the material of the said net which can be easily purchased, Preferably it is iron and aluminum, More preferably, it is a wire net.

4) Binder layer construction step

The binder layer serves to support the upper elastic urethane layer and to fix the lower packaging surface. After the binder layer is formed in a liquid phase, the resin layer is preferably cured to support the elastic urethane layer. It is not limited to a thermoplastic resin as long as the physical properties of the final product are satisfied. Although not limited, in the present invention, the binder layer is polyethylene, polypropylene, polystyrene, styrene-acrylonitrile-butadiene terpolymer (hereinafter referred to as ABS resin), acrylic resin, silicone polymer, fluorocarbon resin, polyvinyl chloride, poly It is preferably selected from the group consisting of vinyl acetate, polycarbonates, polyurethanes and mixtures thereof.

In one preferred embodiment of the invention, the binder layer may be used by mixing the new resin and the recycled resin, or may be used as a new resin alone, depending on the circumstances, using the recycled resin in consideration of the environmental and economic aspects at the same time More preferably.

The binder layer is melted and installed, filled in the pipe, and constructed to completely cover the net. In one embodiment of the invention, the binder layer using the waste resin may be used after the waste resin is collected and crushed to form a chipped or powdered waste resin melted with heat at the construction site to form a liquid phase. It is known to those skilled in the art to crush waste resin and to prepare it as chip or powder waste resin. In one embodiment of the invention, the collected waste resin is crushed by a crusher, and then produced in pellet form using a single extruder or a twin extruder. The manufactured pellets are hot-melted using a mechanical device in the field, and the pellets are injected into the pre-installed pipes and are preferably constructed to cover the net. Apparatuses for feeding into the hot melter and pipe are known to those skilled in the art.

In one embodiment of the invention, the elastic packaging layer is formed on the ground layer. The elastic packaging layer can be prepared using conventional elastic packaging materials and are known to those skilled in the art. In one embodiment of the invention, the elastic packaging layer may use an elastic packaging material including a waste polyurethane chip, a pet tire chip, a waste rubber chip.

In one embodiment of the invention, the elastic packaging layer is installed after the ground layer is cured, installed. After laying the elastic pavement layer, construct the primer layer, apply voltage 2-4 times using a constant temperature roller of about 20-30kg, and place or finish the surface where the constant temperature roller is not touched by curing with heated trowel. It is preferable. The constant temperature roller in the construction method is suitable to use in a state to maintain a temperature of about 50-100 ℃.

Optionally, the elastic layer can be constructed before the base layer is fully cured.

Hereinafter, the present invention will be described in detail.

Example 1

1) Pavement Clearance Step

The work compartment was flattened using a roller by setting a section for opening the elastic package.

2) Construction stage for supporting pipe

Next, a hole having a diameter of 5 cm at a depth of 30 cm was excavated every 30 cm from the flattened part using an excavator. In addition, a hole of 1 cm diameter was drilled in a pipe having an outer diameter of 5 cm and a length of 25 cm at intervals of 5 cm on the side. A perforated pipe was installed by drilling into the excavation hole so that one end of the pipe coincides with the pavement surface.

3) Construction stage of support net

After installing the pipes, a square wire mesh of 5 x 5 cm spacing was installed on the flat screen.

4) Binder layer construction step

After collecting the used PET, it was ground and extruded with a single extruder. The extruded recycled PET pellets were melted with heat at the installation site and laid so as to cover the support net constructed in step 3), while filling the space in the support pipe constructed in step 2). After the binder layer was cured, the primer layer was applied, and then 30 wt% of the polyurethane binder was added to the polyurethane chip. After that, using a roller of about 70 ℃ voltage was about three times, the corner or the surface finish that the roller does not touch was simply treated with a heated trowel. Finally, the coated packaging surface of the present invention was cured for about 5-15 hours.

The present invention provides a stable ground layer that can replace stone or concrete. The ground layer also provides an environmental benefit in that the used resin can be recycled.

1 is a simplified diagram showing an elastic packaging consisting of a ground layer and an elastic layer according to an embodiment of the present invention.

2 is a plan view showing a pipe installed on a flat screen according to the present invention.

3 is a plan view showing that the pipe and the net is installed on a flat screen according to the present invention.

4 is a simplified diagram showing a pipe with a perforated side.

Claims (7)

In the ground layer construction method for elastic packaging, Pavement stage; Constructing a support pipe on the packaging surface; Constructing a support net on the packaging surface; And A binder is filled in the support pipe, and a binder layer is disposed to cover the support net; Wherein the binder is polyethylene, polypropylene, polystyrene, styrene-acrylonitrile-butadiene terpolymer (hereinafter referred to as ABS resin), acrylic resin, silicone polymer, fluororesin, polyvinylchloride, polyvinylacetate, polycarbonate, polyurethane and these Binder layer construction step selected from the group consisting of Ground layer construction method for elastic packaging comprising a. The method of claim 1, wherein the binder is selected from the group consisting of new resins, recycled resins, or mixtures thereof. The method of claim 1, wherein the step of constructing the support pipe Digging a pile hole in the pavement surface; And Installing a support pipe having a diameter substantially the same as the pile hole in the pile hole; Ground layer construction method for elastic packaging, characterized in that consisting of. 4. The method of claim 3, wherein the pile hole is excavated at substantially right angles to the pavement surface. The method of claim 3, wherein the side of the support pipe is drilled to form a hole in the side. 4. The elasticity of claim 3, wherein one side of the pipe substantially shorter than the length of the pile hole is constructed to conform to the pavement surface so that the filled and cured binder is then caught on the bottom surface of the pipe. Pavement ground layer construction method. The method of claim 6, wherein a ring is formed on the top surface of the pipe and connected to the net.