KR20100104057A - Polymer concrete composition recycling waste expended polystyrene as a shrinkage reducing agent, polymer concret and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A polymer concrete composition recycling waste extended polystyrene as a shrinkage reducing agent, polymer concrete using the same, and a method for manufacturing the same are provided to recycle the waste extended polystyrene as a binder for a liquid resin-shaped composite. CONSTITUTION: A polymer concrete composition comprises a unsaturated polyester resin, 1-20 parts by weight of waste extended polystyrene, 10-50 parts by weight of a vinyl monomer, 150-1,200 parts by weight of quenching steel slag, 100-600 parts by weight of filler, and 100-1,200 parts by weight of thick aggregates based on 100 parts by weight of the unsaturated polyester resin. The unsaturated polyester resin is ortho unsaturated polyester having an average molecular weight of 1,000-10,000.

Description

Polymer concrete composition recycling waste expended polystyrene as a Shrinkage Reducing Agent, Polymer Concret and Manufacturing Method

The present invention relates to a polymer concrete composition, and more particularly, to a polymer concrete composition prepared by recycling waste foamed polystyrene as a shrinkage reducing material, a polymer concrete using the same, and a manufacturing method thereof.

As a solution to environmental problems generated by industrial development, it is urgent to develop waste treatment and recycling technologies, and in particular, the waste emitted from the construction industry is significant in size. Among them, waste styrofoam, that is, waste foam polystyrene, has been pointed out as one of the problems of industrial waste treatment because it is disposed of in an expanded state once used. Such research on recycling of foamed polystyrene has been actively conducted to develop applications in the construction and civil engineering fields where mass consumption of products is expected due to the reduction technology of waste foamed polystyrene and the development of recycling of primary processed raw materials. ought. The research on waste foamed polystyrene as a construction material has been pulverized by a pulverizer and applied to light weight aggregates such as building board extender, cement mortar and concrete, lightweight soil material, and drainage medium of surface water.

Waste foamed polystyrene is most frequently treated by mechanical compression, frictional heat, or heat shrinkage by external heating, in order to secure a management place and reduce transportation costs to the recycling plant. On the other hand, the expanded polystyrene can easily reduce the volume to less than 1/20 of the original volume by using a suitable solvent as a material of about 98% of the volume and 2% of the polymer. Therefore, when thermal contraction is performed for the treatment of waste foamed polystyrene, there is a big problem such as lowering the molecular weight of polystyrene and deterioration of quality due to oxidation. Since it can accept, the said fall problem can be prevented. Organic solvents such as styrene or methyl methacrylate having vinyl groups are used as a reducing agent for waste polystyrene, and in order to recycle polystyrene in a polystyrene solution in which polystyrene is dissolved, a distillation process of separating polystyrene and a solvent is required. Because of the necessity, there is a problem of distillation technique and waste of processing cost.

On the other hand, polymer concrete, which is one of construction materials, is used by polymerizing an unsaturated polyester resin. Such an unsaturated polyester resin undergoes volume shrinkage when cured by a polymerization reaction, and deformation of a product occurs with volume shrinkage. Thus, in order to prevent the volume shrinkage of the unsaturated polyester, curing conditions, catalysts, additive ratios such as accelerators or the like, or shrinkage reducing materials are incorporated. In particular, in order to recycle waste foamed polystyrene into polymer concrete, it is possible to use a shrinkage reducing material containing waste foamed polystyrene in an unsaturated polyester resin, but the strength decreases when the shrinkage reducing material is mixed in an unsaturated polyester resin. There is.

In addition, the conventional polymer binder containing an unsaturated polyester resin and a shrinkage reducing material in an amount of 11% by weight to maintain the strength of the concrete. However, since the increase in the content of such a polymer binder, in particular unsaturated polyester is relatively expensive, the increase in the content thereof causes a rise in the cost of concrete, thereby lowering the economic efficiency.

In order to solve the above problems, the present invention is to provide a polymer concrete composition using a waste foam polystyrene solution in the form of liquid resin capable of room temperature polymerization or thermal polymerization as it is not separated by dissolving the waste foam polystyrene in an organic solvent.

In addition, another object of the present invention is to use a shrinkage reducing material containing waste foamed polystyrene, polymer concrete exhibiting excellent strength even when using a low content of a polymer binder containing unsaturated polyester resin and waste foamed polystyrene and its It is to provide a manufacturing method.

In order to achieve the above object, the present invention is an unsaturated polyester resin, 1 to 20 parts by weight of waste foamed polystyrene, 10 to 50 parts by weight of vinyl monomer, 150 to 1,200 parts by weight of quenching steel slag, based on 100 parts by weight of the unsaturated polyester resin. Part, relates to a polymer concrete composition comprising 100 to 600 parts by weight of filler and 100 to 1,200 parts by weight of coarse aggregate.

In addition, the present invention is a shrinkage reducing material forming step of dissolving waste foamed polystyrene in a vinyl monomer; prepared by adding 0.01 to 20 parts by weight of an additive with respect to 100 parts by weight of an unsaturated polyester resin and the unsaturated polyester resin to the shrinkage reducing material Forming a polymer binder; a composite material forming step of mixing 150 to 1,200 parts by weight of a quenching steel slag, 100 to 600 parts by weight of a filler, and 100 to 1,200 parts by weight of coarse aggregate, based on 100 parts by weight of the unsaturated polyester; It provides a method for producing polymer concrete comprising; curing step of curing the composite material for 5 to 30 days at 15 ~ 30 ℃.

The present invention also provides a polymer concrete produced by the above method.

Hereinafter, the present invention will be described in detail.

First, the present invention proceeds to the step of forming a shrinkage reducing material for dissolving waste foamed polystyrene in a vinyl monomer, thereby forming a shrinkage reducing material in the form of a solution in which waste foamed polystyrene is dissolved in a vinyl monomer. Conventional waste foamed polystyrene was dissolved in a solvent for volume reduction, and then used by separating the solvent. The waste foamed polystyrene used in the present invention was dissolved in a polymerizable solvent which is a vinyl monomer, and thus polystyrene was not separated from the solvent. It can be used in the form of waste foamed polystyrene solution to provide ease of manufacturing process. In this case, the vinyl monomer used to dissolve the waste foam polystyrene can be used as long as it is a vinyl monomer which is a polymerizable solvent having a double bond, and is selected from monomers composed of styrene, methyl methacrylate and mixtures thereof. Can be. In particular, since styrene is used as a raw material of waste foamed polystyrene, it can be used as an effective reducing agent of waste foamed polystyrene, and by adding a catalyst, a crosslinking agent, or an accelerator, which will be described later, it can exhibit room temperature curing property when producing a polymer binder, contributing to energy saving. There is an advantage. The waste foamed polystyrene may be included in an amount of 1 to 20 parts by weight based on 100 parts by weight of the unsaturated polyester resin to be described later. In the present invention, when the content of the waste foamed polystyrene is less than 1 part by weight, the effect of reducing the shrinkage reducing material is lowered. In addition, since the content of the unsaturated polyester resin which forms a polymer binder together with the waste foam polystyrene is relatively increased, the cost of raw materials is increased. On the other hand, when the content of the waste foamed polystyrene exceeds 20 parts by weight, it is difficult to uniformly dissolve in the vinyl monomer of the waste foamed polystyrene and the viscosity becomes too high, and workability is remarkably deteriorated. In addition, in the present invention, by using the waste foam polystyrene as a shrinkage reducing material, it is possible to exhibit a cost reduction effect without reducing the strength.

The polymer binder forming step may be performed by adding 100 parts by weight of an unsaturated polyester resin and 0.01 to 20 parts by weight of an additive based on 100 parts by weight of the unsaturated polyester to the shrinkage reducing material prepared as described above. The unsaturated polyester resin is preferably used for the ortho unsaturated polyester having a weight average molecular weight of 1,000 to 10,000 for bonding between the compositions, more preferably an orthophthalate-based unsaturated polyester having a weight average molecular weight of 2,000 to 3,000. As the additive, a catalyst, a crosslinking agent, an accelerator, or a mixture thereof may be included to form a polymer binder that combines each composition of the present invention to impart strength when manufactured from concrete. The accelerator and the crosslinking agent may increase the bonding of the polymer binder, and may increase the strength at the time of manufacturing the concrete together with the improvement of the curing rate at room temperature. Although it does not specifically limit as said catalyst, a crosslinking agent, and an accelerator, The said catalyst is methyl ethyl ketone peroxide, a crosslinking agent is a trimetholol propane trimethylacrylate, and an accelerator can use cobalt octenate.

On the other hand, the present invention is a polymer concrete composition comprising 5 to 10% by weight of the polymer binder, 10 to 30% by weight filler, 20 to 60% by weight quenching steel slag and 10 to 60% by weight coarse aggregate, wherein the polymer binder is unsaturated poly 60 to 80% by weight of the ester resin and 20 to 40% by weight of the shrinkage reducing material, the shrinkage reducing material can provide a polymer concrete composition consisting of 20 to 50% by weight waste foamed polystyrene and 50 to 80% by weight of the vinyl monomer. have. Specifically, in the present invention, 7 to 8% by weight of the polymer binder can be used to exhibit excellent strength.

In the present invention, by using the content of the polymer binder containing the waste polystyrene and the unsaturated polyester resin prepared as described above in less than 10% by weight in the total composition, compared to the concrete produced by using more than 10% by weight of conventional concrete, The composition, the pot life, the initial strength expression can be given between the composition, it can exhibit excellent strength.

A composite material forming step of mixing 150-1,200 parts by weight of quenching steel slag, 100-600 parts by weight of filler and 100-1,200 parts by weight of coarse aggregate, may be performed on the polymer binder prepared as described above with respect to 100 parts by weight of the unsaturated polyester. . In the present invention, by using 150 ~ 1,200 parts by weight of quenching steel slag as part of fine aggregate and coarse aggregate to give strength of concrete, it is possible to keep the strength of concrete excellently by significantly reducing the content of polymer binder. If the quenching steel slag is used in less than 150 parts by weight, there is a fear that the amount of the polymer binder added during the manufacture of concrete, and if it exceeds 1,200 parts by weight, it is difficult to form the closest filling between the concrete composition, the bonding strength is lowered, the excess amount There is no economic effect. In addition, although sea sand (sea sand) has been used as the existing fine aggregate, there has been a hassle to adjust the salt to be less than 0.1% to prevent corrosion of steel when applied to concrete, but the quenched steel slag of the present invention By using it in the said range, the ease of use of using it as it is without a special treatment of a quenching steel slag is provided, and the strength of concrete can also be raised outstandingly. In addition, it is possible to reduce the content of unsaturated polyester as a polymer binder in the overall composition and provide a cost reduction effect as well as the strength of concrete. The quenching steel slag is preferably a sphere having an average particle diameter of 0.3 ~ 1.2mm. If the average particle diameter of the quenching steel slag is out of the above range, it may be difficult to close the filling, resulting in a decrease in concrete strength.

In the present invention, the filler to form a composite material is a heavy calcium carbonate having an average particle diameter of 10 ~ 50㎛ good to increase the filling between the composition, the coarse aggregate may use a crushed stone having an average particle diameter of 5 ~ 8mm. Outside the range of the size of the filler or coarse aggregate, the filling property is lowered, there is a fear that the strength during concrete production.

Curing step of solidifying the formed composite material at 15 ~ 30 ℃ for 5 to 30 days; proceed to the polymer concrete to maintain the excellent strength of the present invention can be completed. Since the curing temperature proceeds in a temperature range close to the room temperature without further raising, the ease of manufacture is provided, and curing can be made in a short time of about 5 to 30 days to produce concrete having excellent compressive strength and flexural strength.

As described above, the present invention has a recycling effect of using waste foamed polystyrene as a binder for a composite material in the form of a liquid resin.

In addition, the polymer concrete of the present invention is used in the state of the waste foam polystyrene solution as it is not separated by dissolving the waste foam polystyrene in an organic solvent, it is easy to apply, efficient and effective at room temperature curing without separation of the solvent.

In addition, by using a quenching steel slab in the polymer concrete composition of the present invention and using waste polystyrene as a shrinkage reducing material, it is possible to significantly reduce the amount of the polymer binder containing an unsaturated polyester resin and to improve the strength and cost. It works.

The polymer concrete of the present invention has excellent water tightness, durability, chemical resistance, abrasion resistance, and impact resistance compared to ordinary concrete, and can be applied to flooring, packaging, waterproofing, repairing, anticorrosive, adhesive, and various precast products.

Example 1

7.5g of waste polystyrene was dissolved in 17.5g of styrene monomer to prepare a shrinkage reducing material. 100 g of ortho-unsaturated polyester resin having a weight average molecular weight of 2,500, 1.5 g of methyl ethyl ketone peroxide, 0.5 g of octal acid cobalt, and 5 g of trimetholpropane trimethyl acrylate were added to form a polymer binder. To the polymer binder, a composite material was formed by adding 357.2 g of a 0.7 mm quench steel slag containing 0.05 wt% of pre-CaO, 357.2 g of heavy calcium carbonate having an average particle diameter of 32 µm, and 946.6 g of crushed stone having a thickness of 6.5 mm. The formed composite material was placed in a circular mold of 10 × 20 and cured at 23 ° C. for 14 days to prepare a specimen from polymer concrete.

Examples 2-20

The composite material was formed to the content of Table 1 and was carried out in the same manner as in Example 1 to prepare a polymer concrete specimen.

Comparative Example 1

Except for using sand (standard sand ordered sand) instead of the quench steel slag, was formed to the content of Table 1 and carried out in the same manner as in Example 1 to prepare a polymer concrete specimen.

TABLE 1

¹⁾ PB: Polymer binder (UPR 80% + PS 20%)

²⁾ RCSS : Rapid-chilled steel slag

³⁾ MEKPO: Methylethylketonperoxide

⁴⁾ CoOc: Cobaltoctoate

⁵⁾ PS: Shrinkage Reducing Material (Polystyrene (Styrene 70% + Waste Foam Polystyrene (EPS) 30%))

⁶⁾ sand: standard sand

Table 2 shows the physical properties measured by the following method for the polymer concrete prepared as described above.

* Test Methods

1) compressive strength

It was measured according to KS F 2481 (Test method for compressive strength of polyester resin concrete), and cured at 20 ㅁ 2 ℃ for 14 days at room temperature to measure the strength.

2) flexural strength

It was measured according to the flexural strength test method (three-point loading method of simple beams) of KS F 2408 concrete.

3) Scanning Electron Microscope (SEM)

The polymer concrete surface was measured by model name S-3400N (Hitachi Co., Ltd.).

TABLE 2

As a result of Table 2, in order to minimize the addition amount of the polymer binder which has the greatest influence on the production cost, the present invention replaced some of the fine aggregate and the coarse aggregate with the quenching steel slag and also reduced the shrinkage rate of the polymer concrete to reduce the volume of the product. In order to maintain stability, it was confirmed that by using 20% of the shrinkage reducing agent prepared by dissolving the waste styrofoam in the styrene monomer, the polymer binder was used to reduce the amount of the polymer binder used by 27.3%. In the case of Example 8, the compressive strength of the polymer concrete specimen (polymer binder 8%, quenching steel slag 40%) is shown as 979 kg _f / ㎠. Calculating the production cost of the polymer binder used in the specimen fabrication at this time can save 12.7% compared to the production cost used for the manufacture of general polymer concrete (see Table 3).

On the other hand, the mixing ratio of the polymer concrete of Comparative Example 1 is composed of 11% polymer binder, 20% filler, 20% sand, 49% coarse aggregate, the compressive strength was 950㎏ _f / ㎠, but the bending strength is 150㎏ _f / ㎠ Appeared low.

[Table 3] Cost Comparison of Existing and Developing Products

1 is a comparative graph of the measurement results of compressive strength of polymer concrete according to an embodiment of the present invention.

Referring to FIG. 1, in the present invention, the compressive strength is the lowest when the amount of the polymer binder is 10%, and the highest when the polymer binder is added 8%. The reason why the compressive strength was lower than that of the high added amount of the polymer binder (10%) compared to the low added amount of the polymer binder (8%) was because the quenching steel slag was spherical, and the surface was smooth. Compared with the coarse fine aggregate or the coarse aggregate, the specific surface area is smaller and the amount of the polymer binder is required. Therefore, it can be confirmed that excellent strength is obtained even if the addition amount of the polymer binder is reduced.

In addition, at 7% of the polymer binder added amount, since the used filler and aggregate are not sufficiently wetted, workability is reduced and strength is also reduced. In addition, when the amount of the polymer binder was added at 9% or more, the amount of addition of the polymer binder was excessive when the specimen was prepared, so that the phenomenon of separation of the polymer binder was observed on the surface of the specimen. Even when 8% of the polymer binder was added, the optimum mixture was formed when the quenching steel slag and the coarse aggregate were added at 40% and 32%, respectively, resulting in the highest compressive strength.

Figure 2 is a comparison graph of the bending strength measurement results of polymer concrete according to an embodiment of the present invention.

Referring to FIG. 2, in the bending strength test results of FIG. 2, as shown in the compressive strength test results of FIG. 1, the bending strength of the 8% specimen of the polymer binder was generally the highest, and the bending strength of the 10% specimen was the lowest. However, the strengths of 7% and 9% polymer binders differed from compressive strengths. In addition, the flexural strength, unlike the compressive strength, increases as the replacement rate of the quenched steel slag increases regardless of the addition rate of the polymer binder. This is because the quenching steel slag is more tough than ordinary aggregates. Although the bending strength of the polymer concrete of Comparative Example 1 was 150 kg _f / ㎠, Example 8 of the present invention exhibits a high bending strength of 175 kg _f / cm 2 or more at 8% of the polymer binder and 40% or more of the quench steel slag replacement rate. It can be seen that.

3 is a scanning electron microscope (SEM) photograph of a quenching steel slag according to a preferred embodiment of the present invention. Referring to FIG. 3, it can be seen that the surface of the quench steel slag is spherical.

4 is a scanning electron micrograph of the surface of the polymer concrete specimen according to Example 8 of the present invention. Referring to FIG. 4, it can be observed that the polymer binder, calcium carbonate filler and fine aggregate are completely fused to form a co-matrix phase.

5 is a scanning electron micrograph of the fracture surface of the polymer concrete specimen according to Example 8 of the present invention. Referring to FIG. 5, it can be observed that the quench steel slag is firmly fused to the fracture surface by the polymer binder matrix.

Therefore, the polymer concrete of the present invention can be recycled and used waste foamed polystyrene, and even when using the polymer binder containing the waste polystyrene in a low content of 8% by weight, the quenching steel slag is particularly used as aggregate. It can be seen that it shows an excellent compressive strength or flexural strength because it is firmly bonded in the polymer concrete composition.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a comparative graph of the measurement results of compressive strength of polymer concrete according to an embodiment of the present invention.

Figure 2 is a comparison graph of the bending strength measurement results of the polymer concrete according to an embodiment of the present invention.

Figure 3 is a scanning electron microscope (SEM) photograph of the quenching steel slag according to an embodiment of the present invention.

Figure 4 is a scanning electron micrograph of the surface of the polymer concrete specimen in accordance with Example 8 of the present invention.

5 is a scanning electron micrograph of the fracture surface of the polymer concrete specimen according to Example 8 of the present invention.

Claims (14)

Unsaturated polyester resin, 1 to 20 parts by weight of waste foamed polystyrene, 10 to 50 parts by weight of vinyl monomer, 150 to 1,200 parts by weight of quenching steel slag, 100 to 600 parts by weight of filler and coarse based on 100 parts by weight of the unsaturated polyester resin Polymer concrete composition comprising 100 to 1,200 parts by weight of aggregate. The method of claim 1, The unsaturated polyester resin is a polymer concrete composition is an ortho unsaturated polyester having a weight average molecular weight of 1,000 ~ 10,000. The method of claim 1, The vinyl monomer is a polymer concrete composition is a monomer selected from the group consisting of styrene, methyl methacrylate and mixtures thereof. The method of claim 1, The filler is a polymer concrete composition of heavy calcium carbonate having an average particle diameter of 10 ~ 50㎛. The method of claim 1, The quenching steel slag is a polymer concrete composition having an average particle diameter of 0.3 ~ 1.2mm. The method of claim 1, The coarse aggregate is a polymer concrete composition of crushed stone having an average particle diameter of 5 ~ 8mm. Shrinkage reducing material forming step of dissolving the waste foam polystyrene in the vinyl monomer; Forming a polymer binder by adding 0.01 to 20 parts by weight of an additive based on 100 parts by weight of an unsaturated polyester resin and the unsaturated polyester resin to the shrinkage reducing material; A composite material forming step of mixing 150 to 1,200 parts by weight of quenching steel slag, 100 to 600 parts by weight of filler and 100 to 1,200 parts by weight of coarse aggregate, to the polymer binder with respect to 100 parts by weight of the unsaturated polyester; Curing step of solidifying the composite material at 15 ~ 30 ℃ 5-30 days; Method for producing a polymer concrete comprising a. The method of claim 7, wherein The content of the waste foamed polystyrene and the vinyl monomer is 1 to 20 parts by weight of waste foamed polystyrene and 10 to 50 parts by weight of the vinyl monomer with respect to 100 parts by weight of unsaturated polyester resin. The method of claim 7, wherein The unsaturated polyester resin is a polymer concrete composition is an ortho unsaturated polyester having a weight average molecular weight of 1,000 ~ 10,000. The method of claim 7, wherein The additive includes a catalyst, a crosslinking agent, an accelerator or a mixture thereof, the catalyst is methyl ethyl ketone peroxide, the crosslinking agent is trimetholol propane trimethyl acrylate, and the promoter is cobalt octenate. The method of claim 7, wherein The vinyl monomer is a method for producing polymer concrete is a monomer selected from the group consisting of styrene, methyl methacrylate and mixtures thereof. The method of claim 7, wherein The filler is a method for producing polymer concrete of heavy calcium carbonate having an average particle diameter of 10 ~ 50㎛. The method of claim 7, wherein The quenching steel slag is an average particle diameter of 0.3 ~ 1.2mm, the coarse aggregate is a method of producing polymer concrete of crushed stone having an average particle diameter of 5 ~ 8mm. Polymer concrete produced by the method of claim 7.

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