JPS6058843A - Resin concrete composite body for corrosion resistance of concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a corrosion-resistant material used for corrosion-resistant work on concrete, and particularly when used as a formwork for concrete when pouring concrete, corrosion-resistant work can be carried out at the same time. This invention relates to a novel resin concrete 1/composite that can be used.

Conventionally, the method of imparting corrosion resistance to columns, beams, walls, foundations, etc. of drainage ditches, sewage channels, storage tanks, or structures made of concrete has been to impart corrosion resistance to surfaces that require corrosion resistance. A method of relining by coating with a material such as a resin-based material (resin mortar, FRP, etc.) or an asphalt-based material has been adopted. However, such conventional methods have drawbacks as described below. Namely, (1) it takes a long time of approximately 2 to 4 weeks for the concrete to harden and dry to the extent that it can be coated and lined; construction period will be longer.

(2) The resin that has been painstakingly coated and lined easily peels off from the concrete, and the resin tends to crack.

(3) Construction cannot be carried out outdoors during rainy weather, and the quality of the coated resin deteriorates during on-site construction, such as J7 variations and pinholes.

(4) Construction costs are high.

There were various problems that were encountered. (lh) In the case of the conventional method such as Kono, when forming the short concrete body, concrete is poured using a formwork made of wood, etc.
It is then coated with resin. Therefore, if the releasability of the formwork is poor, unevenness will occur on the cast surface of the concrete, making it unsuitable for coating and resulting in poor appearance.

Therefore, the present inventor has conducted intensive research to solve the above problems, and as a result, has obtained the present invention.

That is, in the present invention, reinforcing fibers impregnated with a thermosetting resin and a mixture of aggregate, filler, and thermosetting resin are laminated and integrally formed, and when concrete is placed,
The content is a resin-concrete composite for concrete corrosion resistance, which is used as a concrete formwork.

This will be explained in detail below.

The resin concrete composite used in the present invention is made by laminating reinforcing fibers impregnated with a thermosetting resin, preferably glass fibers, and a mixture of aggregate, filler, and thermosetting resin as described above. Formed by molding. Here, examples of aggregate include silica sand, silica stone, natural stone, gravel, and sand, and as filler, particle size is 100 to 40.
Examples include silica powder, silica, clay, talc, mica, etc., but there are no particular limitations, and any substance that is commonly used as a front matter or filler can be used. As thermosetting resins, polyester resins, epoxy resins, phenol resins, polyurethane resins, etc. are used, and in addition, curing agents such as penzoyl peroxide, methyl ethyl peroxide, cobalt naphthenate, metal esters, dimethylaniline, etc. A curing accelerator can also be used in combination as appropriate. The ratio of these blends is 55 to 85% by weight of aggregate and 20 to 20% by weight of filler.
7% by weight, and preferably 25 to 8% by weight of the thermosetting resin.

Such a mixture of aggregate, filler and thermoset 1:1 fat is reinforced by lamination with glass fibers impregnated with thermoset resin. The proportion of the mixture is 10
The amount of glass fiber is 2 to 10 parts by weight relative to 0 parts by weight. The lamination conditions are temperature 5~1 (0" C1 pressure 0~50 kg
/cri preferably 4. The curing period is]
It is between B and 58. This lamination allows resin concrete to be
1. The process of integrally molding a composite body is explained below using a flat plate as an example. First, spray a thermosetting resin onto the +d iron formwork, then lay out glass floss that matches the size of the iron formwork, and then spray the thermosetting resin, -1 onto this. The mixture of 'l shrine and filling shrine is multiplied by IPi. Then, if necessary, glass cloth is further laminated to form a flat plate by vibration molding or vibration press molding. Further, such a flat plate is preferably provided with reinforcing bars and bolts for anchors, and resin concrete composites having shapes other than flat plates are also created in the same manner as this flat plate. Note that an uncured thermosetting resin is used, and in the case of a flat plate, it takes approximately 10 minutes to complete molding and approximately 1 hour for the resin to harden.

According to the present invention, the resin concrete composite is used as a formwork for concrete 1- in a corrosion-resistant construction method for concrete 1-. That is, the resin concrete composite is installed as a formwork for concrete 1 according to the required form before concrete is poured.

Then, if concrete is placed on this, this resin concrete composite will be cast as concrete (1).
Therefore, according to the present invention, the construction work 1- in which the corrosion-resistant material was pasted after the concrete rectangular short body was raised as in the past. Compared to the force method, it has the advantage of significantly shortening the construction period and eliminating the need for monthly formwork fees.Furthermore, as mentioned above, the resin concrete I-composite is used as the anchor material, and 1ζ reinforcing bars, bolts, etc. If it is integrated with the concrete, there is no need to worry about it peeling off, and reliable corrosion-resistant work is possible.Also, unlike in the past, instead of on-site work such as troweling, brushing, and spraying, product management is carried out in advance at the factory. Because it uses a resin concrete composite molded underneath,
Resin-concrete composites, which are corrosion-resistant materials, have no inconveniences such as thickness variations or bottle-balling, and the thickness itself can be set arbitrarily according to the required corrosion resistance, so it can have a very long service life.

The present invention can be applied to integrally molded structures such as drainage ditches, sewage ditches, and community halls, or to large storage tanks, columns, beams, etc. in which resin concrete 1 to 1 m combinations are used as panels for assembly, or as tiles, etc. However, it is needless to say that the invention is not limited to these. The first example of applying the present invention is
The figure is shown in FIG. The resin concrete 1/composite 1 according to the present invention formed as a corrosion-resistant panel as shown in FIG. , glass fibers 3 impregnated with a thermosetting resin are laminated as reinforcing fibers, and a mixture 4 of aggregate, filler, and thermosetting resin is further laminated.

The corrosion-resistant panel 1 also includes bolts 5 as anchor members, which prevent the concrete from separating from the panel after concrete is poured. In FIG. 3, such a corrosion-resistant panel 1 is shown in a state where it is used on the wall surface of a storage tank 6. FIG. 4 shows an example in which the present invention is applied to a U-shaped groove 7, and in this case, the resin concrete 1/composite 8 is used as a formwork and a corrosion-resistant material for the inner surface of the U-shaped groove. FIG. 5 shows an example in which the present invention is applied to the outer frame 10 of the column 9, and in this case as well, separation from the concrete is prevented by using the port 11 as the anchor member. The present invention will be explained in more detail below using Examples and Comparative Examples.

Polyester resin [vinyl ester UE~3505 manufactured by Dainippon Ink]. ] A total of 100 parts by weight of a mixture of 225% by weight (of which 5% by weight is impregnated into glass cloth), 66% by weight of silica sand, and 9% by weight of silica powder, 9 parts by weight of glass cloth was brought into contact with 20 kg at 50°C. / el
+! A resin concrete tank was obtained by integral molding for two days under the pressure of . Table 1 shows the results of evaluating the corrosion resistance of this material. The compressive strength was measured according to JIS A1182, the bending strength was measured according to JIS A 1184, and the tensile strength was measured according to JIS A 1'185.

Actual view 1.

18 it% of the same polyester resin used in Example 1
(5% by weight of it is impregnated into glass cloth), 5
16% by weight of gravel less than mm, 47% by weight of silica sand, and 100% by weight of silica sand.
100 parts by weight of a mixture consisting of 19% by weight of silica powder was brought into contact with 2.7 parts by weight of glass cloth.
℃ under a pressure of 10 kg/c+J for one day to obtain a resin concrete U-shaped groove. Corrosion resistance was evaluated in the same manner as in Example 1 (illi L), and good results were obtained as in Table 1.

↓ 19% by weight of the same polyester resin used in Example 1
(of which 3% by weight is impregnated into glass cloth), 4.4 parts by weight of glass cloth was brought into contact with 100 parts by weight of a mixture consisting of 72% by weight of silica sand and 9% by weight of silica powder.
A resin concrete column was obtained by integral molding at 0° C. for 2 days under a pressure of 10 kg/cffl. When this was also evaluated for corrosion resistance in the same manner as in Example 1, good results were obtained as shown in Table 1.

1 tan 1 turn σ on l intersection - length 4000n+m, width 2000mm, height 1000mm
Corrosion-proofing work on a concrete storage tank was carried out using the resin concrete composite of the present invention, and this was compared with work carried out using conventional resin mortar and troweling. Table 2 shows a comparison of the contents of the required construction items and the construction period. As can be seen in Table 2, the construction time required for the completed salt was about half that of the conventional salt, and the finished product was also perfect. When these concrete storage tanks were started to be used as wastewater storage tanks and the condition of the inner surface of the storage tanks after 3 months had passed, it was found that there was no peeling on either the walls or the floor of the storage tanks using the resin concrete molded product according to the present invention. , the crank wasn't even alive. On the other hand, in the storage tank constructed using the conventional construction method, eight small racks were observed on the wall, and the crack part was white and an efflorescence phenomenon was observed. When the heel surface of Sara G was lightly tapped with a test hammer, peeling was observed in three locations. Furthermore, the storage tank using the resin concrete molded product according to the present invention showed no abnormalities such as discoloration or peeling of the concrete for 1 year even in an atmosphere where hydrochloric acid gas was generated, proving that it has extremely excellent corrosion resistance. . On the other hand, when a storage tank made according to the conventional construction method was used in a similar atmosphere, the concrete showed significant discoloration and peeling was observed in some areas.

Table 2

[Brief explanation of the drawing]

Fig. 1 is a plan view of the resin concrete composite according to the present invention used as a corrosion-resistant panel, Fig. 2 is an enlarged partial cross-sectional view of the panel of Fig. 1, and Fig. 3 is a plan view of the panel of Fig. 1 applied to the wall of a storage tank. Figure 4 is a longitudinal cross-sectional view of the resin concrete composite of the present invention used in a U-shaped groove, Figure 5 is a cross-sectional view of the resin concrete composite of the present invention used in a column panel, and Figure 6 is a cross-sectional view of the resin concrete composite of the present invention used in a column panel. It is a partially enlarged view. 1... Resin concrete composite 2... Aggregate, filler, thermosetting resin mixture 3... Glass fiber impregnated with thermosetting resin 4... Aggregate, filler, thermosetting resin Mixture 5...Bolt 6...Storage tank
7... U-shaped groove 8... Resin concrete composite 9... Column 10... Outer frame 11... Bolt 12...
...Glass fiber impregnated with thermosetting resin applicant's representative
Kaoru Furuya

Claims (1)

[Scope of Claims] 1. A reinforcing fiber impregnated with a thermosetting resin, a mixture of aggregate, filler, and a thermosetting resin are laminated and molded into one piece, and when concrete is poured, the concrete Corrosion-resistant resin concrete composite used as formwork for concrete. 2. Resin concrete composites have a temperature of 5 to 80°C1
The resin concrete composite for concrete corrosion resistance according to claim 1, which is a resin concrete composite laminated under pressure conditions of 0 to 50 kg/cnl. 3. The resin concrete composite for concrete corrosion resistance according to claim 1, wherein the resin concrete composite is integrally molded with an anchor member.