KR20030053420A - Water-permeable construction materials using waste fiber reinforced plastics - Google Patents

Abstract

PURPOSE: Provided is a production process of construction materials with water permeability using waste FRP which lets unsaturated polyester resin bind the waste FRP so that it helps to recycle the waste FRP to high functional construction materials. CONSTITUTION: The production process of the construction materials with water permeability using the waste FRP comprises the steps of: (i) mixing 6-13wt% of unsaturated polyester resin, 1-10wt% of filler and 70-92wt% of the waste FRP; and (ii) letting the mixture put into a frame, vibrating the mixture with compressing and then heating or keeping normal temperature to produce the construction materials.

Description

Water-permeable construction materials using waste fiber reinforced plastics}

The present invention relates to the manufacture of permeable building materials using crushed chips of waste FRP in order to recycle waste FRP causing environmental pollution into environmentally friendly and high-functional construction materials. More specifically, the waste FRP is used as aggregate and its mechanical properties and durability. It is possible to manufacture permeable polymer concrete products by using FRP and Unsaturated Polyester Resin (Up) resin, which is a homogeneous material as a binder.

Fiber Reinforced Plastics (FRP) is a composite material consisting of a fiber as a reinforcement and a resin as a binder. Currently used FRP products are widely used in various fields such as housing equipment, construction materials, industrial structures, etc., and the production volume is also increasing every year, and currently reaches about 35,000 tons in Korea. On the other hand, the amount of discarded FRP is also relatively increased, and about 10,000 tons are emitted per year, which is a serious problem. Because FRP is composed of thermosetting resin and non-combustible glass fiber, it is very difficult to process by incineration unlike thermoplastic resin. Even though incineration is performed, it can cause environmental pollution such as dioxin generation, and the facility for complete incineration is very expensive. to be. As a result, most companies are mainly cutting or crushing landfills, and the current waste FRP is designated as industrial waste, so it is not possible to land it anywhere. .

Regarding the technology of using waste FRP as a construction material, Korean Patent Publication No. 10-0225129 uses a silane coupling agent that can chemically bond between waste FRP powder and matrix resin to change the amount thereof and mix with resin. The manufacturing method of molding a building material is disclosed.

However, the related art relates to a building material composition using waste FRP, but to waste FRP powder and to add a silane coupling agent or the like to increase interfacial bonding force.

The method of manufacturing a binder composition of a permeable dry material using a large amount of waste FRP according to the present invention is a waste FRP of chip state of 5 to 10 mm, which is considered to be difficult to pulverize waste FRP. Therefore, according to the present invention, waste FRP can be utilized in large quantities and a small amount of binder can be used to reduce manufacturing costs, and can express high strength as compared to a permeable block using cement concrete. It has the advantage of excellent resistance and can recycle industrial waste waste FRP as high value added resources.

Therefore, the present invention is to carry out the research for the use of waste FRP as an eco-friendly and economical construction material and the development of recycling technology as a high-functional construction material.

According to the present invention, a water-permeable polymer concrete based on waste FRP having excellent mechanical properties and durability is developed.

In the present invention, in order to maximize the treatment effect of the waste FRP, while maintaining the required strength while maximizing the mixing amount of the waste FRP, and to reduce the amount of resin used to maximize the economic feasibility. For this purpose, the aggregate mixing ratio was adjusted according to the pulverized particle size of the waste FRP and the filler-binding ratio was adjusted. Therefore, it is an object of the present invention to provide a concrete secondary product that can have the required permeability performance while having excellent strength and durability compared to the permeable construction materials using the cement concrete.

The present invention for achieving the above object, 6 to 13% by weight of the amount of resin as a binder in order to ensure the permeability and mechanical properties and durability according to the minimum amount of resin that can bind the waste FRP aggregate, the filler 1 By the process of mixing the composition in the form of -10% by weight, waste FRP in the range of 70-92% by weight, and placing the composition in a mold, vibrating-pressurizing and forming a dry material at room temperature or warming. It is characterized by recycling the FRP.

The most important thing in the manufacture of permeable building materials according to the present invention is that the mixing amount of waste FRP is 75-92% of the total weight, thereby maximizing recycling to resources by using a large amount of waste FRP.

Through the following examples will be described in detail with respect to the specific manufacturing method and effects of the present invention. However, the following examples do not limit the rights of the present invention.

(Example)

In all the examples, the permeability, mechanical properties, and durability of the minimum amount of resin that can bind the aggregate can be considered, so that the amount of resin as a binder is 7.5, 9, 10.5, and the filler (heavy calcium carbonate) -The binder ratio was changed to 0.25: .1, 0.5: 1, 1: 1, and the permeability and mechanical properties of the polymer concrete were greatly influenced by the mixing of the fine aggregates so that the waste FRP fine aggregates were 2.5-5 mm in order to induce the overall optimum mixing. And 1.0 ~ 2.5mm were adjusted and 5 ~ 10mm coarse aggregate was used. It was adjusted according to the mixing ratio of fine aggregate.

After weighing the coarse aggregate, fine aggregate and filler according to the weight ratio, make a dry beam for 3 minutes and mix it uniformly by adding the curing agent corresponding to 1.5% of the resin in the required resin, and then mix it with the aggregate for 3 minutes and shake it with a mold to vibrate. Pressurized.

The specimens of the polymer-permeable concrete were demoulded after 6 hours and cured for 3 days at a temperature of 20 ± 1 ° C. and a humidity of 50 ± 2%, and then the unit volume weight, porosity, compressive strength, flexural strength, and permeability coefficient were measured.

The measured results are shown in Table 1 below.

As can be seen from Table 1, the polymer permeable concrete artificially enlarges the voids for permeability, so the unit volume weight is reduced, and the amount of reduction is constant depending on the type, size, surface condition and mixing ratio of the aggregate used. In the embodiment according to the present invention, it is usually judged that the utilization value is large as a lightweight material as about 55% of the average unit volume weight of cement concrete (when it is 2.400 kg / m 3). In detail, the weight increased as the amount of filler increased, but the increase was very small and increased by 1% for each 1.5% increase in resin usage. Every 10% of this increase is 2%.

The porosity was found to decrease with every 10% increase in 2.5-5mm fine aggregate. In addition, the smaller the amount of filler used under the same conditions, the larger the porosity and the average decrease of 7.8% for each 1.5% increase in resin usage.

The strength and permeability characteristics were good in the amount of resin used in the range of 7.5, 9, and 10.5%, but when the amount is below a certain amount, the strength is greatly reduced due to the lack of the resin amount, and the workability is also largely difficult, so it is difficult to apply on site. In addition, the average difference between compressive strength and flexural strength was 7kg / cm2 and 2.7kg / cm2 when the amount of resin used was 7.5, 9, 10.5%, and the average compressive strength and flexural strength were increased by 3% and 4% each time the resin content increased by 1%. It was found to increase, while the permeability coefficient decreased. In particular, when the amount of the resin exceeds a certain amount, the resin flowed down the bottom of the specimen to form a layer, which significantly reduced the permeability coefficient. Overall, even with a small amount of resin, the strength properties of the specimens are good according to the mixing ratio because waste FRP and unsaturated polyester have good adhesion as homogeneous materials, and the glass fiber of waste FRP plays a role of holding them more firmly. to be.

According to the present invention, it is possible to fundamentally treat waste FRP without causing pollution at all, to reduce the disposal cost of waste FRP, and to manufacture waste FRP as an environmentally friendly and economical construction material. In addition, the manufactured building materials have excellent mechanical and durable characteristics, are lightweight and impart water permeability, and thus can be utilized as high value-added construction materials such as permeable sidewalk blocks and roofing permeable blocks.

Claims (2)

The amount of resin as a binder is 6 to 13% by weight, the filler is 1 to 10% by weight, and the waste FRP is mixed in the range of 70 to 92% by weight. Permeable building materials manufacturing method using waste FRP, characterized in that it is manufactured by a process for molding. The method of claim 1, wherein the resin is an unsaturated polyester.