KR100331789B1 - Elastic and absorbent road pavement material and method of making it - Google Patents

Abstract

PURPOSE: An elastic water-permeable road covering material and its preparation method are provided, to reduce the cost by employing the rubber powder of waste tire and to improve the heat resistance and the water permeability. CONSTITUTION: The elastic water-permeable road covering material comprises 0.5-3 wt% of a chlorine-based pretreating agent; 5-15 wt% of the waste rubber power coated with the chlorine-based pretreating agent; 60-80 wt% of aggregate; 5-20 wt% of a binder for binding the waste rubber powder and the aggregate; 1-2 wt% of a curing agent; and 1-2 wt% of a mixing agent. Preferably the binder comprises the waste PET recycled unsaturated polyester resin; and the binder is acryl-based latex. The method comprises the steps of coating the waste tire rubber powder with a chlorine-based pretreating agent; mixing the coated rubber powder with aggregate; adding a binder to the mixture and mixing them; and adding a curing agent to the mixture to cure them.

Description

Elastic and absorbent road pavement material and method of making it}

The present invention relates to an elastic water-permeable road pavement material and a method for manufacturing the same, which can be used for sidewalks, airplane runways, parking lot floors, and the like, in particular, by using waste PET recycled unsaturated polyester resin as a binder and reducing waste tires. The present invention relates to an elastic permeable road pavement material using rubber powder as a filler and to reduce the price of permeable concrete and a method of manufacturing the same.

According to the road design and construction guidelines of the Ministry of Construction (1973) on the conventional permeable pavement, it consists of filter layer, auxiliary base, base layer and surface layer on the roadbed, and base layer and surface layer are permeable pavement, It has been described to be constructed with layers of cement or permeable cement concrete, in particular, permeable asphalt mixtures are relatively relatively free of fine aggregates in order to increase the porosity of the package itself in order to have a permeability of about 10 ^-2 cm / sec. The grain size is mainly composed of single grains. However, in the case of permeable asphalt, there is a mechanical problem because it is a mixture in which residual aggregates are omitted in order to have permeability, and because the mixture is porous and easily communicates with water and air, the package is easily aged and subjected to water action. Easy peeling of aggregate occurs easily. In addition, the porosity of the book is reduced by pedestrians and vehicles after construction, and dust and earth and sand may fill the voids, and the water permeation function is reduced. In the case of permeable concrete, if the concrete with large voids is formed in order to improve permeability, the strength is not maintained, and the surface is worn out due to the bleeding and the latent phenomenon (floating particles or cement floating on the surface), There was a problem such as arising, having a rough surface.

As a method and technology for producing concrete using waste rubber powder of waste tires that have been previously applied, a method for producing asphalt using waste rubber, asphalt and admixture [Korea Patent Publication No. 90-426], adding waste tire powder to ascon [Korea Patent Publication No. 93-23423], Method of steaming waste rubber powder [Korea Patent Publication No. 94-6738], Method of manufacturing waste rubber by dissolving it in organic solvent and mixing with aggregate Republic of Korea Patent Publication No. 95-25085] and the like. These existing technologies do not impart water permeability, there is a problem such that the binding strength between the aggregate and the rubber powder is not high, and the price of the binder is very high, it is difficult to use such as expensive.

The present invention aims to comprehensively solve the problems of the prior art as described above and to provide a cost-effective and environmentally friendly water-permeable road paving material.

In the present invention, by mixing the waste rubber powder of the waste tire in the road paving material and using waste PET recycled unsaturated polyester resin as a binder with the aggregate, the elasticity and strength was increased and the water resistance was improved.

In addition, waste PET recycled unsaturated polyester resins as binders can be easily processed, such as no need to remove pigments during synthesis, thereby reducing manufacturing costs, maintaining excellent chemical properties of polymers, and expressing excellent mechanical strength during curing. There are also aspects and environmental benefits.

Therefore, an object of the present invention is to provide an elastic permeable road paving material having excellent characteristics and a method of manufacturing the same, by effectively using waste tires and waste PET which cause environmental problems.

The present invention is to produce a road pavement material having excellent elasticity and water permeability by mixing waste rubber powder of waste tire with aggregate using waste PET recycled unsaturated polyester resin as a binder.

Recently, the recycling of waste tires and waste PET bottles is considered very seriously in terms of the environment, and if used properly, there is a great advantage in the national level.

Cement concrete has inherent defects such as slow curing, large drying shrinkage, low strength to weight, and poor chemical resistance, and efforts to improve the cement concrete have been made. Polymer concrete is an organic polymer that uses no cement at all as a binder, and has increased mechanical strength, chemical resistance, roughness, and adhesion compared with cement concrete. It is also looking for ways to use. Epoxy, unsaturated polyester, furan, polyurethane resin, etc. are used as binders of polymer concrete at present, but since they are generally expensive, there is difficulty in practical use of concrete.

Unsaturated polyester resin using waste PET as a binder used in the present invention is a synthetic raw material polyethylene terephthalate (PET), propylene glycol (PG), dipropylene glycol (DPG), maleic anhydride (MA), adipic acid ( Synthesis was performed by varying the amount of AA). In this way, the unsaturated polyester resin synthesized using waste PET does not need to be purified when used as a binder of concrete, and it is economical because it does not need to remove pigments. On average, the use of regenerative unsaturated polyester resin can reduce the price by about 5 to 10% compared to the price of conventional general resin. Also, as the binder of the present invention, waste PET recycled unsaturated polyester resin and acrylic latex can be used. At this time, an accelerator, a gelling agent, an activating agent and a dispersing agent may be added to the acrylic latex as an additive.

Waste tires or waste rubber powders are resistant to long-term aging of the binder due to the oxidation resistance of carbon black contained in rubber, and have high viscosity to increase resistance to permanent deformation, and high elastic properties to prevent reflection cracking and thermal cracking. Endure The main reason for using the rubber component is to reduce the temperature sensitivity and the flexibility and elasticity due to the addition of the rubber component.

In addition, in order to improve the bonding strength of the rubber powder for the production of a water-permeable packaging material of the present invention, the bonding strength was improved by using a chlorine-based pretreatment agent (primer) and the viscosity of the concrete mixture was adjusted by adjusting the amount of styrene monomer (SM). For reference, a coupling agent may be used without using a pretreatment agent to improve the binding ability of the rubber and the aggregate. Specifically, a coupling agent is added to the mixture of the rubber powder and the aggregate. The bonding force may be improved and integrated using waste PET recycled unsaturated polyester resin as a binder.

Recently, as a practical problem, as the aggregate of concrete is depleted, the use of crushed stone or sea sand tends to increase, so the aggregate sufficiently washed and dried is used. In order to increase the porosity, aggregate was used in a relatively single grain size containing little fine aggregate.

More detailed manufacturing method of the water-permeable road pavement is as follows.

A chlorine-based compound (primer) is added to the waste tire or waste rubber powder and mixed in a ball mill.

At this time, the size of the waste rubber powder is used less than 0.2 ~ 30mm. In addition, the mixing time is mixed at a high speed in a relatively short time in consideration of the swelling characteristics of the rubber. The chlorine pretreatment is incorporated in a weight ratio of 2 to 5%, and the rubber powder is relatively single.

Aggregate is mixed with such a compound. At this time, aggregate is generally used gravel or crushed stone used in concrete. Aggregate size of 5 to 20mm was mixed by weight ratio of 70 to 80%.

Next, the binder is added. As binder, orthophthalate type waste PET recycled unsaturated polyester resin was used, which was used to improve the binding capacity of rubber powder and aggregate. Resin is added in an amount of 5 to 20% by weight.

After that, the admixture is added to adjust the viscosity of the concrete mixture (resin weight ratio of 1 to 2%).

In the present invention, in order to prevent aggregate desorption caused by the degree of mixing of the rubber powder and aggregate, the mixture was mixed at high speed in a short time to obtain a mixture having excellent miscibility. In this process, the mixture was added to adjust the viscosity to increase the fluidity, and the present invention was completed by adding an additive and an appropriate amount of an initiator (resin content ratio of 0.3 to 1.5%).

With the composition as described above, the present inventors were able to manufacture a high-performance elastic permeable road pavement, and as the general unsaturated polyester resin is to obtain by controlling the assembly conditions and resin usage of the aggregate to minimize the curing shrinkage behavior Highly functional elastic permeable road pavement was obtained.

In addition, an unsaturated polyester resin having a styrene monomer content of 30 to 45% by weight was used as a means for controlling viscosity. The high-performance elastic permeable pavement material produced by the above method has a specific gravity of 0.6 to 2.0, a permeability coefficient of 10 cm / sec or more, and a compressive strength of 50 to 450 kg / m ² .

As a sidewalk packaging, an elastic rubber block could be produced using only waste tire or waste rubber powder and waste PET recycled unsaturated polyester resin. In other words, it refers to a method of manufacturing a highly elastic permeable rubber block integrated with a rubber powder (weight ratio 60-90%) pretreated with a chlorine compound and a waste PET recycled unsaturated polyester resin as a binder.

Since the elastic permeable pavement material manufactured as described above includes voids therein, it provides comfort and safety during road driving due to excellent permeability and elastic properties of rubber particles. In addition, considering that existing resins were expensive, the recycling of waste plastics and rubber gave economicality as road pavement materials.

In addition, the elastic pitcher pavement material of the present invention can be used in a variety of construction and civil engineering materials, such as road pavement and sidewalk blocks, airplane runways, parking lots, tiles, other marine structures.

Hereinafter, the present invention will be described in detail with reference to Examples.

Example 1

10 wt% of the waste tire powder having a size of 0.2 to 30 mm was coated with a chlorine compound primer (for example, D PLY 007 Co., Ltd.) in a high speed stirrer, and about 80 wt% of the crushed stone of 5 to 20 mm was added thereto.

About 7% by weight of waste PET recycled unsaturated polyester resin was added as a binder and mixed in a ball mill. The amount of the styrene monomer added was about 3% by weight of the resin, and a small amount of a curing agent and an initiator were added.

This mixture was made into shaped articles, pressurized and cured at room temperature for 7 days. The fabrication of this specimen was conducted in accordance with KSF2403 (method for producing and curing specimens for compressive and flexural strength of concrete in the laboratory) and the strength test was conducted in accordance with KSF2405 (compression strength test method for concrete). . The results are shown in Table 1 below.

TABLE 1

Here, the porosity was calculated by 100 (1-d / D), and the specimen for measuring the compressive strength was enclosed in the size of (Ф10 × 20cm), and the specimen for measuring the permeability coefficient was in the size of (30 × 30 × 7cm). (D: actual density, D: density without voids).

Example 2

Waste tire or waste rubber powder (weight ratio 7-15%) and aggregate (weight ratio 70-80%) are mixed, and a small amount of coupling agent (coupling agent weight 2-3 wt%) is added to the mixture to improve bonding strength. Let's do it. Waste PET recycled unsaturated polyester resin (weight ratio of 5 to 10%) was added as a binder to prepare a specimen, which was measured in the same manner. The results are shown in Table 2 below.

TABLE 2

In the present invention, the use of a high-performance elastic permeable packaging material as an effective recycling method of waste PET and waste tires. The high-performance elastic permeable pavement can reduce the risk of traffic accidents by smoothly utilizing water resources during flooding and drought and preventing glare caused by road moisture at night. In addition, the price of resin as an aggregate binder, which has been suggested in general, accounted for more than 50 to 60% of concrete pavement materials, and it is helpful to solve environmental problems by using inexpensive and environmentally friendly recycled resin.

Claims (7)

In the elastic water-permeable road paving material consisting of a waste rubber powder coated with a chlorine pretreatment agent, an aggregate, a binder for bonding the waste rubber powder and the aggregate, a curing agent, a admixture, The weight ratio of the chlorine pretreatment is any one of 0.5 to 3% by weight, The weight ratio of the waste rubber powder is any one of 5 to 15% by weight, The weight ratio of the aggregate is any one of 60 to 80% by weight, The weight ratio of the binder is any one of 5 to 20% by weight, The weight ratio of the curing agent is any one of 1-2 wt% range, The weight ratio of the admixture is any one of 1-2 wt% range, Elastic permeable road pavement, characterized in that the sum of the weight ratio is 100%. The elastic water-permeable road pavement according to claim 1, wherein the binder is composed of waste PET recycled unsaturated polyester resin. The method of claim 1 wherein the binder is elastic permeable road pavement, characterized in that used as an acrylic latex. 4. The elastic water-permeable road pavement according to claim 3, wherein an accelerator, a gelling agent, an activator, and a dispersant are added to the acrylic latex. delete delete A first step of coating waste tire or waste rubber powder as a filler with a chlorine pretreatment agent; A second step of mixing the rubber powder and aggregate coated with the chlorine pretreatment agent; A third step of mixing the waste PET recycled unsaturated polyester resin as a binder to the mixture of the rubber powder and the aggregate; And And a fourth step of adding and mixing a small amount of curing agent to integrate the mixture of the rubber powder, the aggregate and the binder.