KR20040048661A - Polymer contcrete structure for a flume and method thereof - Google Patents

Abstract

PURPOSE: A polymer concrete structure for irrigation and drainage channels is provided to simplify conveyance and construction, to have excellent durability against environmental pollution, to improve watertightness and chemical resistance and to prevent a drop of strength by freezing-thawing. CONSTITUTION: The polymer concrete structure(10) for irrigation and drainage channels comprises: a binder composed of an unsaturated polyester resin admixture, initiator added to harden the unsaturated polymer resin admixture, shrinkage reducing agent added to prevent the crack caused by the shrinkage of polymer concrete, and silane added to increase chemical adhesion of the polymer concrete; filler added to reduce the use of the polymer concrete and to increase viscosity of the polymer concrete; an aggregate admixture composed of coarse aggregate and fine aggregate; a form removal member applied on the surface of a form to strip the polymer concrete from the form easily after placing the polymer concrete; glass fiber added to improve tensile strength and elasticity of the polymer concrete; and reinforcement installed to increase the tension resistance of the polymer concrete.

Description

Polymer contcrete structure for a flume and method

The present invention relates to a waterway structure of a waterway, a drainage channel for a waterway, which is basically applied to civil engineering, agricultural engineering, complex construction, and forest project.

More specifically, the channel structure of the open water channel for molten and drainage channels is made of polymer concrete, which has high compression and flexural strength, small size, light weight, easy transportation and construction, high freeze-thawing resistance, and high chemical resistance. The present invention relates to a polymer concrete structure and a method of manufacturing the same for the use, drainage for excellent durability.

Prior to describing the present invention, the polymer used in the text refers to an unsaturated polyester.

As industrial development and quality of life are improved, the demand for water resources is rapidly increasing. However, current rainfall cannot completely solve this problem, and even the development of new reservoirs and the construction of dams have been overwhelmed by environmental protection theory. It is true.

Therefore, as a way to cope with this, it is important to save the water developed in advance to increase the utilization efficiency of water resources.

Conventional waterway structures mainly used earthwork waterways in the case of agricultural water.

However, the earthwork canal is expensive to maintain due to the removal of water plants and the rehabilitation work inhabiting it, difficult to manage, and large amount of leaks from the water source produced at a huge cost. There is a problem that it is difficult to maintain the waterway section due to the frequent slope collapse of the rainy season and the destruction of the living environment and natural environment by destroying the groundwater and underground ecosystem by the old water.

In order to solve this problem, precast concrete product installation method for installing and installing precast concrete products in the field, or pre-concrete products that are pre-fabricated in the factory There is a method of installing the waste plastic structure to install a structure formed of waste plastic, etc. in a section of the.

However, these waterway structures had the following problems.

First, in the case of cast-in-place concrete structures, it is difficult to manage the quality (strength, dimensions) when constructing on-site because most of the constructions for drainage and drainage structures that are constructed during agricultural works are scattered over a large area. It is difficult to secure the access road necessary for pouring, and the quality and strength deterioration is serious because the construction conditions due to leaching of groundwater are disadvantageous.

In addition, the inside and outside of the structure are always exposed to atmospheric moisture, surface water, and groundwater, so if the freezing and thawing action in winter is repeated, cracks occur and the life is shortened, and concrete caused by carbon dioxide and acid rain in the atmosphere This also shortens the durability due to the neutralization, and if the construction is completed in a short period of time, the necessary quality check after the period of minimum strength (28 days) was impossible.

In addition, due to the low water tightness, as moisture and oxygen penetrated into the structure are combined with the reinforcing steel in the structure to oxidize the reinforcing steel, the cracking of concrete occurs due to the volume expansion of the steel, which also shortens the life of the structure. In case of long-term use, maintenance costs increase rapidly along with difficulties of maintenance, etc., and the surface erosion of the structure is caused by water flow and similarity in the section with high flow rate, and the sedimentation similarity can be removed by equipment (backhoe). Even if a part of the structure is damaged due to the inexperience of the operator, it has to be extended to the surroundings and reconstructed.

In addition, a large amount of waste concrete is generated when the concrete structure is used and disposed, and this waste is virtually impossible to recycle, resulting in land damage and an increase in transport processing cost as it is transported to a landfill.

On the other hand, when using precast concrete products, the weight is heavy, so the transportation cost is excessive, and therefore, it is possible to supply only in limited areas, and it is not only applicable to ultra-small structures (mainly low width of 1m or less), but also the installation cost in the field. There is a drawback of excessive increase, and due to the characteristics of the product, the product must be manufactured by the accelerated curing by high temperature steam, but when it is rapidly promoted at high temperature to cure, there is an advantage that the curing cost is low, but due to the repeated freezing and thawing action There is a drawback that the structure of the structure is destroyed within 10 years due to reduced durability, the strength and durability is reduced by the neutralization of concrete by carbon dioxide and acid rain in the atmosphere.

In addition, due to the low water tightness, the reinforcing steel is oxidized by chemically bonding the internal steel reinforcement with the water penetrating into the structure, and cracking occurs due to the volume expansion of the steel, and is heavy and weak in strength due to the characteristics of precast concrete products. Frequent damage due to careless handling, surface erosion of the structure caused by water and similar was caused.

In addition, when the waste plastic product is used in some sections, the weight of the product itself is light, and when the bottom surface of the product is in contact with the groundwater, the product is frequently destroyed by buoyancy from the bottom, and ultraviolet rays when exposed to sunlight for a long time Deterioration of the plastic caused by the early damage is caused, leaks caused by the reliability of the construction joints, or the strength is weak, there was a disadvantage that is easily deformed by the lateral earth pressure.

In addition, due to the nature of the plastic is vulnerable to fire, there was a problem such as deformation caused by fire and loss of function.

The present invention is to solve this problem, the technical problem is that can express high strength, thin thickness can be made light weight, easy to transport and construction, do not need a separate equipment for curing, even It is to provide a polymer concrete structure with excellent quality and watertightness and no strength degradation due to freezing and thawing.

The polymer concrete structure is excellent in durability and chemical resistance to environmental pollution as an unsaturated polyester, and easy to construct it can be sufficiently solved the above-mentioned conventional problems when used in the repair and repair structure of the water, drainage.

1 is a perspective view of a polymer concrete structure according to the present invention

2 is a front sectional view of a polymer concrete structure according to the present invention;

Figure 3 is a side view of the state used for the structure of the present invention, drainage

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a cross-sectional view taken along the line B-B of FIG.

6 is a cross-sectional view taken along the line C-C of FIG.

7 is a front view of a rubber index plate

8 is an enlarged cross-sectional view showing main parts showing an installation state of the present invention;

9 is a cross-sectional view of the state used as a mobile bridge of wild animals

10 is a side view of the state utilized as a water pipe

11 is a cross-sectional view of the state utilized as the water gate

※ Explanation of code for main part of drawing

10 polymer concrete structure 11,12 socket portion

13,14: socket ball 16: reinforcement rib

17: support rib 20: rubber index plate

30: bolt 31: nut

40: cap 50: valve

60: valve

In order to achieve the above object, the polymer concrete structure for the drainage and drainage channels of the present invention uses an organic unsaturated polyester resin as a binder and is cured by mixing an inorganic aggregate with it. It is a high polymer concrete (Polymer Concrete).

The polymer concrete mixed as described above is put into a mold made of an open structure for melting and drainage channels, and then manufactured by a compaction molding method by vibration.

Polymer concrete produced as described above is a high strength, thin member thickness, excellent durability, chemical resistance and watertightness, light weight and excellent workability as an open repair structure for water and drainage, which can be easily obtained as a factory product.

The water and drainage structures according to the present invention can be used to construct environmentally friendly waterway structures, using polymer polymer concrete, which is a new construction material in consideration of the preservation, maintenance and management of the natural environment, depending on the needs of the consumer or the size of the waterway structure. The structure can be manufactured in one piece or as a prefabricated type.

Therefore, the polymer concrete structure of the present invention is widely used for agriculture, for the clearing channel of the drainage channel, for the side waterway of the road, for the construction of the complex, for the drainage channel, for all four places of business, drainage, other repair, drainage, etc. Can be used.

Hereinafter, the present invention will be described in more detail.

In the present invention, the polymer concrete structure for drainage and drainage channels is a mixture of an unsaturated polyester resin which is a polymer compound in which a saturated monomer of a constituent molecule is polymerized with an ester bond, and for curing the unsaturated polyester resin. It consists of an initiator added, a shrinkage reducing agent added to prevent cracking due to shrinkage of the polymer concrete, and a crosslinking agent added to increase the chemical adhesion of the polymer concrete. A binder;

A filler added to reduce the amount of resin and increase the viscosity of the polymer concrete;

Aggregate mixture consisting of coarse aggregate pulverized gneiss crushed stone to less than 10mm and fine aggregate using silica sand remaining on the sieve 100 from 5mm or less;

Form removal applied to the surface of the form to facilitate the demoulding of the polymer concrete from the form after the polymer concrete pouring;

Glass fibers added to improve tensile strength and elastic modulus of the polymer concrete;

It is composed of; reinforcement (Reinforcement) is installed to increase the tensile resistance of the polymer concrete.

The unsaturated polyester resin mixture used as a binder is a polymer compound in which saturated monomers of its constituents are polymerized by ester bonds, and are easy to handle, have excellent curability, and can be cured freely even at room temperature.

It has good mechanical, electrical and chemical resistance compared to other thermosetting resins.

The unsaturated polyester resin used in the present invention has an Ortho-type component to which a cobalt-based curing accelerator is added, and 8 to 15% is added.

An initiator is added to an unsaturated polyester resin to which a curing accelerator is added to cause a curing reaction. An curing agent and an initiator are usually added to cure an unsaturated polyester resin. An unsaturated polyester resin to which a curing accelerator is added is added. If only the initiator is added to the curing reaction occurs.

As the curing accelerator, a mineral turpentine solution (CoOc) of 8% cobalt octanoate is mainly used, and a DMP solution of 55% methyl attelketone procoxide is used as an initiator.

Generally, the amount used is about 1% of the resin amount.

Shrinkage reducing agent (Shrinkage reducing agent) is to reduce the amount of shrinkage that occurs during the curing of the unsaturated polyester resin, usually unsaturated polyester resin is a large shrinkage of 7-10% occurs during curing.

This is used to prevent cracking due to shrinkage when the polymer concrete is used as a structural member, and an appropriate amount should be used because it reduces the strength of the polymer concrete.

This varies depending on the content of the styrene monomer in the resin regardless of the curing rate, and in order to reduce such shrinkage amount, in the present invention, a thermoplastic polystyrene was dissolved in the styrene monomer.

The crosslinking agent (Silane) is intended to increase the chemical adhesion of the polymer concrete, and the polymer adhesive is generally weak due to the bonding of the organic polymer matrix and the inorganic aggregate.

In order to prevent such defects and to improve the bonding strength, the silane is used as a crosslinking agent, and the amount of the silane is used in an amount of about 1 to 3% of the resin amount.

Filler (Filler) is a particulate filler used for the purpose of increasing the adhesive strength by reducing the amount of resin used per unit volume and increasing the viscosity when blending polymer concrete.

The material used is calcium carbonate, which has a large specific surface area and is advantageous in weight when polymer concrete is blended.

Aggregate mixtures are divided into coarse aggregate and fine aggregate.

The coarse aggregate is used for gneiss crushed stone, washed to strengthen the adhesion between the binder and aggregate, dried for 24 hours in a dryer of 110 ± 5 ℃ so that the moisture content of the aggregate is less than 0.1%, and then cooled and used. The largest dimension of coarse aggregate is less than 10mm in diameter.

The fine aggregate is used as silica sand, which remains on the 100th sieve from 5mm or less, and the moisture of the aggregate is dried after cooling for 24 hours in a dryer of 110 ± 5 ℃ so that the water content is less than 0.1%.

Form removal is applied to the surface of the formwork to facilitate the demoulding of the formwork with the polymer concrete after pouring the polymer concrete.

Glass fiber has elongation of 3-4%, which has good tensile strength and tensile modulus, and uses glass fiber with excellent heat resistance and fire resistance, and improves flexural strength when bonded to the tensile side of a structure. Will be done.

Reinforcement is installed where the increase of tensile strength is needed to increase the tensile resistance, and use what is specified in KS D 3504.

In the formulations, the mixing ratio of the polymer concrete varies according to various factors such as the purpose of using the mixture, the type of resin, the shape and the particle size of the aggregate, and the like. The experiment is repeated in consideration.

The following table shows the experimental values.

(Unit: wt.%)

Binder Filler Aggregate UP + ST S.R.A Initiatorcontent (phr ^* ) Silane (phr ^* ) Coarseaggregate Finesggregate 8-10 2-5 0.5-1 0-2 10-12 26-28 49-51

Note: UP; Unsaturated polyester resin

ST; Styrene monomer

S.R.A; Shrinkage reducing agent

phr *; parts per hundred parts of resin

1 is a perspective view of a polymer concrete structure according to the present invention, Figure 2 shows a front cross-sectional view.

As shown, the polymer concrete structure 10 of the present invention is formed in a "??" shape of the upper surface is open, the product itself is formed in a socket type so that the socket of the concave-convex shape to be joined to the structure 10 adjacent to both ends The portions 11 and 12 are formed.

The socket parts 11 and 12 of both sides are symmetrical to be joined to each other, and the socket hole 12 for fastening the socket part of the other structure 10 joined with the bolt and nut to the upper and lower sides of the socket part. Is formed.

In addition, reinforcing ribs 15 and 16 are integrally formed on both sides of the structure 10 in the vertical direction, and these reinforcing ribs also form a step between the body and also serve to easily catch a hook during transportation. do.

In addition, a support rib 17 protruding to the bottom surface is formed at the lower end of the socket portion 11 to support the load of the structure 10.

Figure 3 shows another embodiment of the prefabricated polymer concrete structure according to the present invention, which is suitably manufactured for the furnace, drainage, Figures 4 to 7 shows a cross-sectional view of each part shown in FIG.

As shown in the drawing, the polymer concrete structure 10 used for the drainage and drainage is characterized by a plurality of longitudinal reinforcing ribs 16 formed on the side because it receives a lot of load from the upper side.

The other socket portions 11 and 12, the socket holes 13 and 14, and the support ribs 17 have the same shape.

8 is a cross-sectional view showing the opening operation of such a structure (10).

At the time of installation, the structure 10 is transported to the installation place and mounted on the site, and then the rubber index plate 20 is inserted between the structure 10 and the socket portions 11 and 12 of the adjacent structure 10. Join the socket parts of the structure.

After mating, the nut 30 is inserted through the bolts 30 through the socket holes 13 and 14 of the adjacent structure 10, and the rubber index plate 20 is connected to the socket portions on both sides using an impactor. Fasten with bolts 30 so as to be in close contact (compression).

The rubber index plate 20 is formed in the same "??" shape as the sockets 11 and 12, as shown in Figure 7 is firmly pressed to the socket surface of the both sides by the fastening force of the bolt 30, the water tightness of the connection portion Will be maintained.

By repeating the above process, the polymer concrete structure is connected and constructed in order up to a desired section.

9 shows that the polymer concrete structure 10 of the present invention is used as a moving bridge of a wild animal, and the upper side of the lid 40 is covered with a lid 40 to hold soil on the top of the structure 10. Wild animals are to move through.

FIG. 10 is a side view of a state used as a water fountain, and installs a valve 50 capable of changing the direction of water in the structure 10 and changes the flow direction of water according to the operation of the valve 50 from the outside. It is.

11 is a front sectional view of the state utilized as the dilution door, and installs a valve 60 to control the water in the structure 10, the water in the structure by operating the valve 60 up and down from the outside This is regulated.

As described above, the present invention uses an organic unsaturated polyester resin as a binder for the polymer concrete structure for the drainage and drainage channels, and mixes the inorganic aggregate therein with high strength and high chemical resistance, and puts it in the formwork and vibrates it. Since it is manufactured by the compaction molding method, it is high strength, the thickness of the member is thin, excellent in durability, chemical resistance and watertightness, and excellent in workability as light weight.

In addition, as an environmentally friendly repair structure, it can be used as a curing escape structure that attracts the cured animals trapped in the waterway channel to the arsenal at the bottom of the waterway pipe and helps to move out of the waterway through the ramp, and restores the ecosystem cut off by the waterway construction. In order to achieve this, environmentally friendly water pipe covers can be developed and used as mobile bridges for wildlife to travel.

In addition, it can be widely used as a prefabricated fountain tube, a fountain door, or a prefabricated distillation door.

Claims (8)

In the structure for the use and drainage channels using polymer concrete, 8-15% of unsaturated polyester resin mixture, an initiator added to cure the unsaturated polyester resin, and added to prevent cracking due to shrinkage of the polymer concrete A binder composed of a shrinkage reducing agent and a crosslinking agent added to increase the chemical adhesion of the polymer concrete; A filler added in an amount of 10 to 30% to reduce the amount of use of the polymer concrete resin and to increase viscosity; 60-80% of the aggregate mixture of which coarse aggregate having a particle diameter of 10 mm or less and fine aggregate having a particle diameter of 5 mm to 0.074 mm are singly or mixed; A release material applied to the surface of the formwork in order to facilitate demoulding of the formwork and the polymer concrete after pouring the polymer concrete; Glass fibers added to improve tensile strength and modulus of the polymer concrete; Reinforced to be installed to increase the tensile resistance of the polymer concrete; Polymer concrete structure for the drainage, characterized in that consisting of. The method of claim 1, wherein the unsaturated polyester resin mixture is a polymer compound in which saturated monomers of the constituent molecules are polymerized by ester bonds, and has an olso-type component to which a cobalt-based curing accelerator is added. Polymer concrete structures. The polymer concrete structure of claim 1, wherein the initiator is a DMP solution having 55% methyl atken ketone procoxide and about 1% of the amount of resin is added. According to claim 1, wherein the shrinkage reducing agent is a polymer concrete structure for the drainage, drainage characterized in that the thermoplastic polystyrene dissolved in the styrene monomer. The polymer concrete structure of claim 1, wherein the crosslinking agent is added with about 1% to 3% of the amount of resin as the silane. The polymer concrete structure of claim 1, wherein iron wire, reinforcing bars and glass fibers are disposed in the polymer concrete to increase tensile strength and resistance. According to claim 1, wherein the polymer concrete structure (10) has an open upper surface of the "??" shape of the concave-convex sockets (11, 12) to be joined to the structure 10 adjacent to both ends thereof in a symmetrical form It is formed, and the socket hole 12 for fastening the socket portion and the bolt 30 and the nut 31 of the other structure 10 is formed on the outer side, the outer side of the socket portion, the vertical direction and one side sockets on both sides Reinforcement ribs 16 and the support ribs 17 are formed at the lower end of the part 11, respectively, characterized in that the polymer concrete structure for drainage. 8-15% unsaturated polyester resin mixture, coarse aggregate having a particle size of 10 mm or less, fine aggregate mixture having a particle size of 5 mm-0.074 mm, or 60-80% of the aggregate mixture alone or mixed, 10-30% of a filler, a hardener, Method for producing polymer concrete for drainage and drainage, characterized in that the polymer concrete produced by the accelerator or silane alone or mixed 0.1% to 3% alone or mixed is poured into a mold, and then molded by sufficient vibration compaction and cured for a predetermined time. .