KR20020072500A - Paving method of paving materials which contain waste tire and urthane rubber chip - Google Patents

Abstract

PURPOSE: A construction method for permeable elastic packing materials using waste tires and waste urethane color rubber chips is provided to secure stability and to prevent a slump by a lower bearing layer. CONSTITUTION: The construction method for permeable elastic packing materials using waste tires and waste urethane color rubber chips comprises the steps of: leveling and tamping a construction site; placing primer(13); preparing materials for a lower bearing layer(12) composed of gravel or quartz sand(121) and waste tire rubber chips(122), and materials for an upper elastic layer(11) composed of color rubber chips; and placing materials for a lower bearing layer, then placing materials for an upper elastic layer before materials for a lower bearing layer are hardened.

Description

[Paving method of paving materials which contain waste tire and urthane rubber chip}

The present invention relates to a method of constructing a water-permeable elastic packaging material using waste tires and waste urethane color rubber chips. More specifically, the present invention is stably supported using rubber waste and / or waste urethane rubber waste water such as waste tires. It relates to a construction method of the packaging material to maintain the elasticity.

In general, with the development of the industry, waste tires and general solid wastes (waste rubber, synthetic resins, waste foundry sand, stone, etc.) have also increased, and the disposal of these wastes is now largely expensive, as well as environmental pollution. It is a social issue. And as the industry develops and enjoys abundant life, the cause of environmental pollution increases, while the demand for a pleasant environment is increasing.

Waste tires have high annual emissions (estimated at 21 million in 2000), and are composed of high-grade synthetic rubber with abundant calories. Unlike other wastes, waste tires do not require special collection and sorting processes, which is very valuable as a recycling business. In the case of recycling, there are only a few treatment facilities in the commercialization stage due to the constraints of economic feasibility and marketability.

At present, domestic waste tire treatment technology has about 20 kinds of usage method and treatment technology, and it uses circular methods such as military serious work, civil works, landfill, yard, and heat utilization methods such as cement kiln, dry distillation, pyrolysis, and recycling. There have been proposed methods of processing and using tires such as tire activated carbon production, rubber powders and powdered products.

Since the tires are difficult to decompose quickly because the tires are difficult to decompose, the environmental problems may be sustained for a long time or semi-permanently.The heat-use method may lead to the generation of residual pollutants and other pollutants after use. Recycling method can maximize recycling efficiency in order of circular use-heat use-processing use, and future policy should focus on high recycling value and high value-added processing use method.

At present, the environmental and related agencies show that the recycling rate of waste tires was 77.1% in 1996 and 58.8% in 1997.However, as shown in the figures, heat use and The actual recycling rate, such as processing use, should be increased, and environmentally friendly functions should be developed through mixing with other environmental wastes.

In addition, urethane is also occupied in every corner of life and occupies a very important position, it is widely used in sports goods as well as baby diapers, automobiles, construction, transportation, insulation insulation and interior materials. Therefore, a huge amount of waste urethane is released, and the recycling performance is insignificant.

On the other hand, conventional sports facilities such as bicycle paths, walkways, parks, etc. are used by forming concrete mixed with stone and cement, which are inorganic materials, or by using products such as some color cones, pitcher cones, and asphalt concrete. The molded products are too high in strength and the impact of the ground is large, and due to the expensive construction cost and material costs are only being constructed in part, the following problems are pointed out.

Concrete sidewalk blocks and color cones are widely used because of their excellent hardness, heat resistance, and weather resistance, but they are susceptible to breakage even in the case of weak impacts. In addition, there was a problem in terms of economic and utility, such as the problem that the feeling of walking is hard without elasticity.

In addition, the packaging material using the waste urethane has the advantage of having a good feeling when walking because of the elasticity, but there are many problems such as settlement of the ground because it is not stably supported.

Accordingly, it is an object of the present invention to provide a method for constructing a packaging material that can be stably supported while maintaining elasticity.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing which shows the structure of the water permeable elastic packaging material of an example of this invention.

※ Explanation of code about main part of drawing ※

1: packaging material 11: upper elastic layer (colored)

12: lower support layer 13: primer

121: silica sand, fine aggregate 122: waste tire rubber chip

The object of the present invention is to flatten the factory plant, and then chopped, and after the primer is installed, the waste tire rubber chip 10 (grains) (gravel) having an average particle diameter of 6-10mm and ground to 70-80 parts by weight of silica and 4-8mm particle size Before preparing the lower support layer material and curing the lower support layer material by preparing a lower support layer material mainly composed of -30 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. It is achieved by the method for constructing a water-permeable elastic packaging material, which is characterized by pouring the upper elastic layer material immediately thereafter.

Looking at the present invention in more detail as follows.

According to the present invention, the type of rubber used to make the rubber chip used in the lower support layer can be any synthetic or natural rubber generally used, and it is preferable to use the discarded rubber for environmental protection, in particular waste tires. Rubber is preferred. The physical properties of waste tire rubber chips are as follows.

<Table 1> Physical Properties of Rubber Tires of Waste Tires

Kinds Elongation Rate (KSM6951-95) Phosphorus strength (KSM6951-95) Heat / cold resistance test length change rate (%) (80 ± 1 ℃ × 24 hours) (20 ± 1 ℃ × 24 hours) Spring hardness (n1) particle Waste Tire Rubber Chips 160 (%) 72.2㎏f / ㎠ + 0.4 / -0.2 78 3 to 7 mm

1 is a cross-sectional view showing the structure of a packaging material constructed by the construction method of the present invention. Referring to FIG. 1, the main material incorporated for stable support in the lower support layer 12 placed on the primer 13 is preferably gravel or silica sand in consideration of economical efficiency and the like. 70-80 parts by weight of fine aggregate (gravel) or silica sand with an average particle diameter of 6-10 mm and 10-30 parts by weight of waste tire rubber chips ground to a particle size of 4-8 mm are mixed. In order to bond the material, 10-20% by weight of the urethane resin of the entire lower support layer is mixed. The mixing ratio of gravel or silica sand and waste tire rubber chips should be adjusted so that the specific gravity of the packaging material is higher than that of water.

Polyurethane color rubber chip and / or EPDM color rubber chip used as the main material of the upper elastic layer 11 is preferably cut to 3-4mm size, the urethane binder is 15-25 of the total weight of the upper elastic layer It can be mixed in weight percent. If it is used in an amount less than the rubber chip is not sufficiently bonded to cause a separation and if too much binder is used only the elasticity of the rubber is reduced and no further increase the adhesive force effect.

The physical properties of the waste urethane color rubber chip are as follows.

<Table 2> Physical Properties of Waste Urethane Rubber Chip Specimen

Kinds Heat / cold resistance test Length change rate 80 + 1 ℃ 24 hours-20 + 1 ℃ 24 hours Resilience (KSM6951-96) Spring Path (KSM6951-95) Tensile Strength (KSM6951-95) Elongation Rate (KSM6951-95) Abrasion loss (mg) Waste Urethane Rubber Chips 0.3 / 0.1 32 (%) 72 0.9 (mpa) 60 (%) 608ASTM D 4060Wheels: H-18 RPM: 1000Weight: 1000g

A preferred thickness ratio of the lower support layer 12 and the upper elastic layer 11 is 2: 1. The lower support layer 12 and the upper elastic layer 11 are bonded by the polyurethane binder mixed in the upper elastic layer.

The construction procedure using the packaging material of the present invention is shown in FIG.

Through the preparatory process, flatness is secured on the current aging concrete block, color cone or permeable cone, and the defective part is pretreated with a permeable leveling material, and if oil remains, it is removed with neutral detergent.

After determining the construction section, the primer 13 is constructed between the surface material and the base layer. Primers should be installed so as not to impair the permeability, and then enter the surface work process.

The surface work materials are classified into two types and mixed separately. The urethane binder and resin mixture materials are mixed at the following mixing ratios.

Usage Main material Mixed materials Mixed rain Remarks Upper elastic layer (soft layer) Waste Urethane Color Chip Urethane Binder 15-25% Weight ratio Lower support layer (hard layer) Waste tire rubber chip residue aggregate, silica Urethane Resin Mixture 10-20% Weight ratio

To improve the bonding performance of the material during casting after transportation, the compaction of 50 ~ 90 degree heat roller is essential and excellent flatness can be secured by using a special construction machine, the finisher, to secure the flatness. Since the two-stage integral work, the upper elastic layer 11 is constructed before hardening after the lower support layer 12 is poured.

Polyurethane can be sprayed onto the rubber chip surface to improve the durability of the surface.

Even after construction, it has a permeable structure, so it has high characteristics in terms of environmental preservation such as rainfall, rainwater mitigation, and groundwater reduction function.

After constructing the two-in-one type elastic packaging material, it should not be subjected to impact and heavy load during curing, and should be cured for at least 24 hours in winter (below 1 ° C) for at least 24 hours in summer (more than 30 ° C).

Hereinafter, the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited to the following examples.

Example 1

Through the preparatory process to ensure the flatness, the primer was constructed. As the upper elastic layer material, 80kg of waste urethane color rubber chips cut to 3-4mm by recycling waste urethane rubber were put into a blender and 20kg of polyurethane binder (Kyung-oh Chemical, Siheung, Siheung, Gyeonggi-do, KA-770) was added. Uniformly mixed to prepare an elastic layer material. In another blender, 70 kg of sand selected to 8 mm in diameter and 15 kg of rubber chips for recycling waste tires cut to 4 to 8 mm in diameter were placed, and 15 kg of polyurethane resin was mixed to prepare a uniform lower support layer material.

The lower support layer material was first poured and then compacted with a 50-90 degree thermal roller to improve the bonding performance of the material. The upper elastic layer was constructed before curing after placing the lower support layer.

The results obtained by performing the performance test of the constructed product are shown in Table 3 below.

Table 3. Performance test results

Item Early 1 week 2 weeks 3 weeks 4 weeks Heat resistance (temperature 80 ℃) 17.9 19.4 19.8 20.3 22 Water resistance (temperature 30 degrees Celsius) 17.4 15 15.6 16.4 15.4 Cold resistance (temperature -20 ℃) 17 16 15.7 15.8 16 Moisture resistance (temperature 30 ℃, humidity 95%) 16 13.7 13.4 14.9 15.6

In order to examine the durability at high temperature and time, the results showed that the strength increased little by little over time and improved about 17% after 4 weeks. It is thought to be the result shown because it hardens with time.

When the results of the shelf resistance, water resistance, and moisture resistance performed at the temperatures of -20 ° C and 30 ° C, no change was observed in the initial value or the value after 4 weeks. This fact shows that the pavement material of the present invention is very resistant to low temperature and water, which is very resistant to water, and can be used as a pavement or bicycle road pavement in the domestic situation where the four seasons are distinct and rain or snow falls. The result shows that the quality of the product can be sustained even if the external environment changes.

The packaging material constructed by the method of the present invention can not only ensure stability because the upper elastic layer reduces the impact of the body, such as walking or running during all human activities, and can also prevent slump reduction due to the lower support layer. have.

The packaging material constructed by the method of the present invention was excellent in durability according to environmental changes, and has a specific gravity higher than water, thereby having an advantage of stability and elasticity. In addition, waste tires, waste urethane and the like can be recycled, and the invention is also beneficial for environmental protection.

Claims (4)

After flattening and crushing the factory, the primer was constructed, and then 10-30 parts of waste tire rubber chips ground to 70-80 parts by weight of fine aggregate (gravel) or silica sand having an average particle diameter of 6-10 mm and 4-8 mm of particle diameter were used as main components. Prepare the lower support layer material and the upper elastic layer material mainly composed of waste urethane color rubber chips cut to 3-4 mm length, and then cast the lower support layer material and place the upper elastic layer material immediately before the lower support layer material is cured. Construction method of a water-permeable elastic packaging material, characterized in that. The method according to claim 1, wherein after the pouring step, a step of curing at 1-30 ° C. for 1-5 days is added. The method according to claim 1, wherein the upper elastic layer is a urethane binder is mixed at 15-25% of the total weight of the upper elastic layer. The method according to claim 1, wherein the lower support layer is a polyurethane resin mixed with 10-20% of the total weight of the lower support layer.