KR20020090581A - Polymer mortar composition for flume and manufacturing method of flume using the composition - Google Patents

Abstract

PURPOSE: A polymer mortar composition for a pleum pipe, a method for preparing a pleum pipe using the composition and a pleum pipe prepared by the method are provided, to reduce the shrinkage of the polymer mortar and to improve the workability, thereby allowing the polymer mortar to be charted into the inside of a mold easily. CONSTITUTION: The polymer mortar composition comprises 15-25 wt% of a filler; 60-70 wt% of aggregate; and the balance of a binding material comprising an unsaturated polyester resin and a shrinkage reducing agent. The binding material comprises 15-25 wt% of a shrinkage reducing agent, and comprises further 8-13 parts by weight of a styrene monomer based on 100 parts by weight of the binding material. Preferably the filler is calcium carbonate.

Description

Polymer mortar composition for flume tube and method for producing flue tube using same {Polymer mortar composition for flume and manufacturing method of flume using the composition}

The present invention relates to a polymer mortar composition used in the production of the plume tube and a method for producing a plume tube using the same, and more particularly, in the molten drainage channel formed for smooth water supply or drainage of agricultural cropland, roadside or park, etc. Polymer mortar composition to reduce the shrinkage of the polymer mortar used in the manufacture of the plume drainage pipe as much as possible while increasing the workability to facilitate the filling into the mold, and to maximize the strength in the production of the plume pipe using the same A method for producing a plum tube.

In general, the plum tube is an open tube formed to expose the top surface, and is a component of a water drainage channel for improving water flow in agricultural fields, roadsides, and parks. In particular, the road drainage is generally formed by connecting a single plume pipe in the form of a socket. The waterway is formed by inserting the plume pipe into the ditches formed along both sides of the road so that water flows out. It is properly drained to prevent damage caused by road flooding.

The plume pipe constituting such a water drainage channel is generally manufactured by pouring concrete in a mold for producing a plume tube composed of an inner mold 2 and an outer mold 1, followed by demolding, as shown in FIG. 1. In this case, it may be manufactured by inserting reinforcing bars into the inner side 3 of both sides of the plume tube for the purpose of enhancing the strength of the plume tube.

However, the plum pipe is concrete based on aggregate and cement. It is not only weak in strength, but also low in waterproofness and causes corrosion of internal reinforcing steel by moisture penetration through surface cracks, and cement concrete has low resistance to freeze-thawing repetitive action. Damage is easily happening.

Due to this purpose, the thickness of both side plates of the plume tube is increased for the purpose of increasing strength, but the manufactured plume tube is heavy and has a disadvantage in that transportation and construction are not easy.

Therefore, a method of manufacturing a thin and light plume tube should be preceded, and various methods have been researched and developed for this purpose. Among the methods for manufacturing the thin and light plume tube, a method of manufacturing a product using a semi-permanent polymer mortar having light and high strength and excellent chemical resistance and freeze-melting resistance compared to the cement concrete plume tube product has been proposed. .

However, when the polymer mortar is used, when the polymer mortar is poured into the mold as shown in FIG. 1, the length of the outer mold 1 of the mold is 1 m or more, so the depth of the lower ends of the inner side 3 of the mold is deep, so that mortar can be easily poured. The disadvantage is not. In other words, the compaction of the polymer mortar is not sufficiently made, it is rather difficult to reduce the strength and smooth surface finish, there is a problem in the bending of the plate due to the curing shrinkage rate or dimensional stability during the curing of the polymer.

Accordingly, the present inventors have studied a method for producing a plume tube having sufficient bending strength and impact resistance by using a polymer mortar composition and a polymer mortar prepared in this way to control the workability of the polymer mortar to facilitate filling into the mold. At one end, the present invention has been completed.

Accordingly, the present invention is to solve the above-mentioned problems, the polymer mortar composition to facilitate the filling into the mold by reducing the shrinkage of the polymer mortar used in the manufacture of the flute pipe constituting the water drainage channel as much as possible while increasing the workability And to provide a method for producing a plume pipe to maximize the strength and impact resistance in the process of producing a plume pipe using the same.

1 is a cross-sectional view of a mold for producing a conventional plum tube.

2 is a schematic illustration of a method for measuring the side plate flexural strength of a plume tube;

3 is a schematic representation of a method for measuring bottom plate flexural strength of a plume tube.

In order to achieve the above object, the present invention provides a polymer mortar composition for plum pipe comprising a binder, a filler and an aggregate containing an unsaturated polyester resin and a shrinkage reducing agent,

It can be achieved by providing a polymer mortar composition for the plum pipe, characterized in that the styrene monomer is further contained 8% to 13% by weight relative to 100% by weight of the binder, and 15% to 25% by weight of shrinkage reducing agent. .

Hereinafter, the polymer mortar composition for plum pipe according to the present invention will be described in more detail through the preparation method thereof.

In the present invention, first, the styrene monomer is further included in a conventional binder composition composed of an unsaturated polyester resin, a shrinkage reducing agent, and a curing agent as a binder composition. This has the advantage that the strength can be increased as much as possible when the binder is composed only of unsaturated polyester resin and shrinkage reducing material, but the flow value, which is a measure of workability, is low, so that the mortar flow is not good and filling is not easy. To this was added styrene monomer.

When the styrene monomer is included in the binder composition as described above, the viscosity of the binder is lowered, thereby increasing the flow value of the prepared polymer mortar. Thus, in the case of polymer mortar having a high flow value, it is easy to pour mortar into both sides of the mold 3 when pouring it into the flue tube mold shown in FIG. 1, and thus, filling is easy and thus sufficient strength can be obtained even if the thickness is thin. It becomes possible.

In this case, when the content of the styrene monomer is included in less than 8% by weight with respect to 100% by weight of the binder, sufficient flow values cannot be obtained. Therefore, when the mortar is poured into the plum pipe mold, filling into the inside of both sides of the mold 3 is not easy. When the content exceeds 13% by weight, the content of the unsaturated polyester resin and the shrinkage reducing material is relatively low, which not only lowers the strength but also increases the amount of curing shrinkage. Therefore, the content of the styrene monomer is preferably to include 8% to 13% by weight relative to 100% by weight of the binder.

Since the amount of hardening shrinkage is greatly changed according to the content of the styrene monomer, there is a disadvantage of causing bending of the plate or cracking of the surface and a decrease in strength.

In the present invention, the shrinkage reducing material is included in an amount of 15 wt% to 25 wt% with respect to 100 wt% of the binder. In this case, if the content is less than 15% by weight, there is a disadvantage in that a sufficient shrinkage reduction effect cannot be obtained. If the content is more than 25% by weight, the content of the unsaturated polyester resin is relatively low, resulting in a decrease in strength. It is preferable to include the shrinkage reducing material in the.

In addition to the shrinkage reducing agent, a curing agent is added within a conventional range for curing the unsaturated polyester resin, and in the present invention, about 1 part by weight is added to 100 parts by weight of the binder.

When the filler and aggregate commonly used in the binder having the composition as described above are blended within a conventional compounding range, it is possible to prepare a polymer mortar having a high flow value according to the present invention.

In this case, the filler and aggregate may be added to the filler and aggregate used in the usual range, in the present invention, so as to include 15 parts by weight to 25 parts by weight of calcium carbonate as the filler to 100 parts by weight of the total mortar composition It was. In addition, in the present invention, the No. 6 silica sand and the No. 1 silica sand conventionally used as the aggregate were mixed at a ratio of 1: 1 by weight to 60 parts by weight to 70 parts by weight based on 100 parts by weight of the total mortar composition.

As described above, in the case of the polymer mortar prepared according to the present invention, the flow value, which is a measure of workability, has a range of 120 to 123, and the polymer mortar composition prepared as described above is a conventional plum mortar as shown in FIG. 1. Placing in the mold facilitates filling into the deep side mold interior 3 and also enables the production of a plume tube of sufficiently high strength.

In this case, when the flute tube is manufactured by a conventional method using the polymer mortar prepared as described above, it is possible to produce a flute tube having a high strength. However, the present invention provides a method for producing a plume tube as follows in order to produce a plume tube with higher strength and excellent impact resistance.

First, the glass fiber mat reinforcement of the plum tube is carried out by the following reinforcement method.

After the release agent treatment on the inner surface of the mold (1, 2) of the conventional flue tube mold as shown in Figure 1 and coating the unsaturated polyester resin on the inner mold (1), that is, the outer contact surface of the side wall of the flute tube, the unsaturated poly The glass fiber mat is attached before the ester resin is completely cured, and then evenly applied the pre-weighed unsaturated polyester resin (glass fiber mat: unsaturated polyester resin = 1: 1.4, weight ratio) on the glass fiber mat, After sufficiently impregnating with a roller to remove bubbles, when the unsaturated polyester resin for laminating the glass fiber mat is semi-cured, the polymer pipe mortar prepared by the above-described present invention is poured into a mold under the oscillation compaction, as described above. After the polymer mortar which has been charged under vibration compaction is semi-cured, an unsaturated polyester resin having a thickness of about 0.5 mm is transferred to the bottom plate of the plum tube (4) ( 1) After applying evenly to the surface, the glass fiber mat cut to the dimensions is attached to the top, and again the previously weighed unsaturated polyester resin (glass fiber mat: unsaturated polyester resin = 1: 1.4, weight ratio) After applying, the roller having a spiral recess is sufficiently impregnated and cured while removing bubbles, and then demolded.

The unsaturated polyester resin coated after the mold (1) inner surface of the mold with the release agent is for perfect impregnation and clean surface finish by the unsaturated polyester resin of the glass fiber mat.

The glass fiber mat attached to the outside of the side wall of the plum tube and the bottom plate by using an unsaturated polyester resin is formed for the purpose of improving the strength and impact resistance of the manufactured flute tube. It is possible to have impact properties.

That is, after the installation of the plume, the outer surface of the side wall of the plume and the outer surface of the bottom plate are subjected to a tensile force. A high tensile glass fiber mat impregnated with an unsaturated polyester resin having excellent adhesion and durability shares the tensile force, Significantly increase the overall flexural strength of the bottom plate. In addition, the glass fiber mat impregnated with an unsaturated polyester resin has an excellent protection against external impact of the polymer mortar.

When the glass fiber mat is coated on the surface of the glass fiber mat when the glass fiber mat is reinforced on the outer side surface of the plum tube, the thickness thereof may be 0.3 mm to 0.7 mm. At this time, if the thickness is less than 0.3mm, there is a problem that sufficient adhesion between the glass fiber mat and the polymer mortar is not achieved. If the thickness exceeds 0.7mm, a thin resin film is formed between the polymer mortar and the glass fiber mat layer to provide adhesion. This decreases, and in particular, when the polymer mortar is added, the uncured glass fiber mat caused by friction is caused to occur in the mortar, so that it is preferable to coat it to have the thickness as described above.

Thus, it is reinforced with glass fiber mat impregnated with high adhesion and high durability unsaturated polyester on the side of the flute pipe, and the polymer mortar is poured under vibration compaction, and then the glass fiber mat reinforced on the outside of the bottom plate is completed. When cured and demolded, the plume tube according to the present invention can be produced.

Hereinafter, the present invention will be described in more detail with reference to the following examples, which are only presented to aid the understanding of the present invention, but the present invention is not limited thereto.

<Examples 1 to 11>

Polymer Mortar Preparation Example

14 kg of a binder mixed with the same ratio as in Table 1, 0.14 kg of a curing agent, and 66 kg of aggregates mixed with calcium carbonate 20 kg and No. 6 silica sand and No. 1 silica sand in a 1: 1 mixture were prepared to prepare a polymer polytalum by a conventional method. Then, compressive strength, flexural strength, flow value, and curing shrinkage were measured by the following method, and the results are shown in Table 1 below.

-Compressive strength-

Using the prepared polymer mortar, the specimen was prepared by the 'Test Method for Strength Test of Polyester Resin Concrete' of KS F 2419, and then the compressive strength was measured according to the 'Compressive Strength Test Method of Polyester Resin Concrete' of KS F 2481. Five measurements were taken and their averages were shown.

-Flexural strength-

Using the prepared polymer mortar, the specimen was prepared by KS F 2419 'Test method for the test of strength of polyester resin concrete', and then the flexural strength was five times according to the 'Measuring method of bending strength of polyester resin concrete' of KS F 2482. It measured and showed the average value.

Flow value

Polymer mortar flow was measured according to JIS R 5201 'Physical Test Method of Cement', where the diameter of the flow plate was 254mm, the shank copper width of the flow plate was 12.7mm, the mold size was Φ70 × Φ100 × 50mm, and the compaction rod was Φ20 × 200 mm. The test was impacted by dropping the flow plate 15 times once a second, and the average value was measured after measuring the flow values in two perpendicular directions.

-Hardening shrinkage rate-

Hardening shrinkage was measured by Ohama-Demura method. The polymer mortar to be measured is molded into a mold of size 7 × 7 × 32cm using a 3000RPM flat plate vibrator, and at the end of the mold freely movable LVDT (displacement measuring instrument) with precision 0.005mm at the time of polymer mortar gel time ( In the longitudinal direction) and the displacement was measured at 10 minute intervals.

division Binder Composition Ratio (%) Compressive strength (kgf / ㎠) Flexural strength (kgf / ㎠) Flow value Hardening Shrinkage (× 10 ^-4 ) Unsaturated polyester Styrene Monomer Shrinkage reducing agent Example 1 100 0 0 830 ± 5 205 ± 2 96 ± 2 37 Example 2 80 0 20 805 ± 5 200 ± 5 85 ± 2 16 Example 3 75 5 20 780 ± 5 187 ± 2 106 ± 2 19 Example 4 72 8 20 772 ± 5 184 ± 5 112 ± 2 21 Example 5 70 10 20 765 ± 5 182 ± 2 120 ± 2 23 Example 6 67 13 20 710 ± 5 172 ± 2 121 ± 2 24 Example 7 65 15 20 680 ± 5 164 ± 2 122 ± 2 29 Example 8 80 10 10 780 ± 5 187 ± 2 123 ± 2 26 Example 9 75 10 15 770 ± 5 184 ± 2 120 ± 2 24 Example 10 65 10 25 720 ± 5 173 ± 5 112 ± 2 22 Example 11 60 10 30 690 ± 5 161 ± 2 109 ± 2 20

As shown in Table 1, the compressive strength, the flexural strength, the flow value, in the case of adding the styrene monomer within the preferred range of the present invention in Examples 2 to 7 while changing the addition amount of the styrene monomer in the case of 4 to 6 It can be seen that all of the curing shrinkage is excellent.

However, it can be seen that in Example 2, in which styrene monomer was not added, and in Example 3, in which the amount thereof was added below the range of the present invention, the flow value, which is a measure of workability, was low. In addition, it can be seen that in Example 7, the addition amount exceeded the range of the present invention, the strength was low and the curing shrinkage rate was very high.

Further, in Examples 8 to 11 carried out while varying the amount of shrinkage reducing material added, Examples 9 and 10 in which the shrinkage reducing material was added within the preferred range of the present invention were excellent in compressive strength, flexural strength, flow value, and curing shrinkage ratio. It can be seen that.

However, in Example 8 in which the amount of shrinkage reducing agent was added below the range of the present invention, the curing shrinkage rate was high, and in Example 11 in which the amount of the shrinkage reducing agent was added to exceed the range of the present invention, the compressive strength, the bending strength, and the flow It can be seen that both the value and the hardening shrinkage show poor results.

Based on Table 1, the following plume tube manufacturing example was performed using the polymer mortar prepared in Example 5 having excellent compressive strength, flexural strength, flow rate, and curing shrinkage ratio.

<Example 12>

Plume tube manufacturing

After treatment with a conventional release agent on the inner surface of a conventional flue tube mold (100 × 200 × 200 cm) as shown in FIG. 1, 0.5 mm of unsaturated polyester resin is formed on the inner surface of the mold 1, that is, the outer contact surface of the side wall of the flute tube. Coated with a thickness of 1, a glass fiber mat (100 x 200 x 200 cm) was attached before the unsaturated polyester resin was completely cured, and then a previously weighed unsaturated polyester resin (glass fiber mat: unsaturated polyester resin = 1). : 1.4, weight ratio) and evenly impregnated while removing bubbles with a roller having a spiral recess. When the impregnated unsaturated polyester resin is semi-cured, under completion of vibration compaction, the polymer mortar prepared in Example 5 is poured and semi-cured, and the unsaturated polyester resin (glass fiber mat: unsaturated polyester resin) is formed on the outer surface of the bottom plate of the plum tube. = 1: 1.4, weight ratio) evenly applied and then completely impregnated by removing the bubble with a roller having a spiral curl, completely cured and demoulded to prepare a plum tube.

In order to examine the bending performance of the side wall and the bottom plate of the plum pipe thus manufactured, a structural test was performed as shown in FIGS. 2 and 3. To simulate the earth pressure effect on the plume pipe from the side wall, the side wall bending test was conducted from the outside to the inside as shown in FIG.

Comparative Example 1

Polymer mortar prepared by a conventional method under vibration compaction without the glass fiber mat reinforcement layer after treatment with a conventional release agent on the inner surface of a conventional flue tube mold (100 × 200 × 200 cm) as shown in FIG. 1) using a blending ratio of 1) to completely cure and demoulding to prepare a plume tube. The flexural strength of the side wall and the bottom plate of the thus prepared plum tube was measured in the same manner as in Example 12, and the results are shown in Table 2 below.

division Flexural strength (kgf / ㎠) shroud Bottom plate Example 12 700 680 Comparative Example 1 240 230

As shown in Table 1, in Example 12 in which the flute tube was manufactured by the method according to the present invention, it can be seen that the bending strength was much superior to Comparative Example 1 in which the flute tube was manufactured by the general method.

As described above, the present invention provides a polymer mortar composition for reducing the shrinkage of the polymer mortar used in the manufacture of the plume duct and at the same time increasing the workability to facilitate the filling into the mold. It is a useful invention to provide a method for producing a semi-permanent plum tube excellent in strength and impact resistance and excellent durability in the process of manufacturing.

Claims (4)

A polymer mortar composition for plums comprising a binder, a filler and an aggregate containing an unsaturated polyester resin and a shrinkage reducing material, 8% to 13% by weight of the styrene monomer is further included with respect to 100% by weight of the binder, and the shrinkage reducing agent is 15 to 25% by weight. The method according to claim 1, 15 parts by weight to 25 parts by weight of calcium carbonate as the filler with respect to 100 parts by weight of the total polymer mortar, a mixture of No. 1 silica sand and No. 1 silica sand in a 1: 1 1: 60 parts by weight to 70 Particulates and remainder of the polymer mortar composition, characterized in that consisting of a binder. After the release agent treatment on the inner surface of the mold (1, 2) of the ordinary flue tube mold, the unsaturated polyester resin is coated on the inner surface of the mold (1), and the glass fiber mat is attached before the unsaturated polyester resin is completely cured. Next, apply the previously weighed unsaturated polyester resin (glass fiber mat: unsaturated polyester resin = 1: 1.4, weight ratio) evenly and impregnated sufficiently by removing the bubble with a roller having a spiral curl, the unsaturated polyester for impregnation When the resin is semi-cured by pouring the polymer mortar under the vibration compaction and semi-cured; After the release agent treatment is applied to the inner surface of the plum tube bottom plate 4, the unsaturated polyester resin is evenly applied, and then the glass fiber mat cut to the dimensions is attached to the upper surface, and the previously weighed unsaturated polyester resin (glass fiber mat: And then evenly apply unsaturated polyester resin = 1: 1.4, weight ratio), and then sufficiently impregnate the bubble with a spirally patterned roller to remove bubbles and attach it on top of the semi-cured polymer mortar, and completely demold. Method of making a tube. Plume tube, characterized in that produced by the manufacturing method of claim 3.