JPS583517B2 - General-purpose coating material for construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the provision of a general-purpose coating material that is effective for various base materials, coating materials, and other uses in architecture.

In the case of repairing the concrete base of the ceiling in architecture or painting the ceiling directly on this base, concrete walls,
When repairing the base of a block wall or brick wall, when applying a finish after applying a base coat with these base mortar, or when preparing the base for applying finishing material to a concrete slab floor, Fuoi mortar coating is recommended. It accounts for the majority.

However, this mortar coating has the following drawbacks.

1. It is necessary to set up a temporary practice field.

2. A storage area for materials such as aggregate and cement is required.

3. Finishing takes a long time.

4. The cost of machinery, equipment, and manpower required to transport mortar materials is high.

5. Cracks and peeling are likely to occur after finishing.

6. During construction, other finishing work and wrapping work are difficult due to the large amount of water used and the complexity of the work.

7. The cost of cleaning up and disposing of mortar debris during construction is expensive.

8. Since the coating thickness cannot be made very thin, it is uneconomical in terms of materials and labor.

9. When it comes to specifications for mortar coating, it is easy to think too roughly of the accuracy of the building frame.

The coating material of the present invention was developed primarily as a substitute for mortar with the intention of solving the above-mentioned difficulties, but as will be described later, its excellent physical properties are not limited to merely as a substitute for mortar. do not have.

The present invention will be explained in detail below.

With the above-mentioned intention, the present inventor has developed an additive for mortar-like materials to improve various physical properties, first of all, to enable thin coating, especially ultra-thin coating, and to have waterproofness and adhesive ability. In order to obtain this, we selected a vinyl acetate and acrylic copolymer resin that can form a smooth coating, has a suitable hardness, and prevents the softness and sagging that is the drawback of the resin materials. Based on many years of experience, plaster and alkali-resistant short glass fibers were selected to provide the cement with a water-retaining ability that optimally adjusts the moisture content and time required for cement hardening.

Furthermore, if the application is for ultra-thin coating, the plaster may be omitted, and the composition of the mortar-like material mentioned above is cement, silica sand, and stone powder, but it is convenient to use silica sand, especially dry silica sand. There is a side.

Ordinary silica sand contains moisture, which causes the cement to harden, so adding silica sand is limited to the time of kneading, but dry silica sand does not cause this phenomenon, so resin liquid There is no problem in preparing other mixed compositions (e.g., in bags) in advance, and it is better to simply add the resin liquid and water to this at the time of construction. be.

In addition, regarding the construction method, mix the resin liquid with the mixed aggregate that has been prepared and packed in a bag, knead it with a small amount of water to the appropriate hardness, and apply it with a metal trowel or PVC in the same way as ordinary mortar construction. Apply with a trowel.

Mixing and kneading can be easily done in a hand bucket or the like at the construction site. If the precision of the base of the construction surface is good, apply it like "Shigoku", and if the precision of the base is poor, apply the first coat and use a ruler. After printing, it can also be pressed with a metal trowel.

The coating thickness is 0.2mm to 20m depending on the accuracy of the underlying surface.
It can be applied freely up to a thickness of 0.3 m, but from a cost perspective, the accuracy of the coated surface must be increased to reduce the coating thickness to 0.3 m. It is preferable to install it to a thickness of about 2 mm to 5 mm.

Of course, if there is no need to paint the entire surface, it can also be used as a partial repair material.

The physical property test of the present invention is as follows.

■Physical property tests for curing at low temperatures (bending, compression, tensile adhesion strength) First, when finishing work is done on the interior and exterior during the winter, the mortar hardens at low temperatures.

In particular, temperatures can drop below zero at night, and if the mortar contains a lot of water, it will freeze and not be strong enough.This experiment covers several possible cases during actual construction. I am assuming that.

Type of experiment 1. Cured at room temperature (20°C) for 7 and 28 days.

2. After kneading and coating at room temperature for 3 hours, cure at 0°C for 3 days, then cure at room temperature for 4 days and 25 days.

3. Knead at room temperature, apply for 3 hours, then leave at 0℃ for 6 hours.
The test was performed by curing at room temperature for 8 hours and repeating this cycle for 7 days.

In addition, after repeating the test at room temperature and lower temperature for 7 days, it was cured at room temperature for 2 days.

4. Immediately after cross-contacting at room temperature and painting, it was placed in a constant temperature bath at 0°C and cured at low temperature for 7 days.

In addition, the specimens under the same conditions were then cured at room temperature for 21 days and tested.

5. After kneading and coating at room temperature, the mixture was cured at room temperature for 3 days and then at 0° C. for 4 days for testing.

Further, the specimens under the same conditions were then cured at room temperature for 21 days and tested.

The above items are illustrated in FIG.

The test results of the specimens are shown in Table 1.

b Water resistance test (bending, compression, tensile adhesion strength) type of experiment 6. Dry at room temperature for 3 days after application (20±2℃, 60℃)
±5% RH), cured in water for 4 days from the 4th day, and left in the air for 24 hours before testing.

7 Dry for 24 hours after application, then soak in water for 6 days, same as step 6.

8. After application, it was dried for 24 hours, immersed in water for 8 hours, and then dried for 16 hours, each cycle consisting of 7 cycles.

9. Only the bending and compressive strength tests were carried out in water-absorbed state after being cured in water for 7 days.

10. It was left outdoors for 7 days after 24 hours of application.

The above items are illustrated in Figure 2.

The test results of the specimens are shown in Table 2.

The results of the tensile adhesion strength test for each of the above specimens are shown in Table 3 and Figure 3.

c Regarding the adhesion strength test to the steel plate base, No. 4, No. 4
As shown in the figure.

d Table 5 shows the inner wall adhesion strength test.

e The outer wall adhesion strength test is shown in Table 6.

f The rate of change in length due to drying was measured.

The measurement method was in accordance with "JISA1125 Mortar and concrete length change test method (comparator method)".

From these results, the following points have become clear: In the present invention, (1) the amount of shrinkage of the initial material is considerably smaller than that of ordinary mortar.

From around the 14th day of the mortar period, it started shrinking to the same extent as 1:2 ordinary mortar.

(2) Compared to other commercially available thinly coated mortars, both the present invention and ordinary mortar have less shrinkage than commercially available products.

The features and advantages of the product of the present invention that have become clear from the above are listed below.

1. There is no need to set up a temporary mixing area, and mixing can be easily done in a bucket or the like at the application site.

2. It can be applied extremely thinly and is economical in both materials and construction.

3. Extremely resistant to cracking and peeling.

4. It has greater adhesion power than mortar.

5. There is no need for machinery or equipment for transporting materials, and the cost of manpower is low.

6. The construction period is short.

7. There is no crumbling like with normal mortar construction, and there are no cleanup, cleaning, or disposal fees.

8. Because the amount of water used is small, the workability is high, and there is no complexity, it is possible to wrap the work with other finishing work.9. By encouraging thin coating, the accuracy of construction on concrete surfaces, etc. can also be improved.

10. Depending on the type of mixed aggregate, it can be used in various fields such as floor repair materials, abrasion resistant materials, asbestos board surfaces for the J method of blaster boards, Styroform surfaces, iron plate surfaces, etc.

11. It is possible to perform construction at high temperatures, high humidity, and low temperatures (experimental data: 0°C), and the specified strength can be obtained.

Etc., it is possible to not only remove, improve, and improve the defects caused by the current use of mortar in plastering, but also to use it for various purposes.
There is no waste, the cost is low, and the work is of high quality.

Further, an example that is considered to be applicable for application due to its physical properties is as follows.

1 For interior spraying on concrete surfaces with ricin base and cloth pasting base.

2. For use as a spray tile base for exterior concrete surfaces and as a paint base.

3. For use as a paint base for interior concrete surfaces.

4. Blaster board, for J method (unlike putty, there is no fading on the J part).

5. For use as a heat-retaining top coat paint base or as a finishing touch for equipment ducts that are flush with Styrohome.

6. For concrete block surface paint base and spray tile base - less cracking.

7. For floor surface wear resistance (addition of carborundum and other wear-resistant aggregates)
.

8. Floor repair material, part of exposed concrete surface repair material.

9. For covering steel surfaces (steel stairs, etc.).

10. For indoor juraku walls.

11. Can be used as a mortar for non-walking asphalt curing (5mm to 10mm).

As described above, the present invention is not only an excellent substitute that completely eliminates the drawbacks of conventional mortar, but also has an extremely wide range of use and is revolutionary in its versatility.

[Brief explanation of drawings]

1 and 2 are graphs showing the conditions of the specimen, and FIGS. 3 to 4 are graphs showing the results of each test.

Claims (1)

[Claims] 1. A mortar-like material made of cement, silica sand, and stone powder,
A general-purpose coating material for construction, which is made by using plaster, warm asbestos, and alkali-resistant glass short fibers as a mixed aggregate, and adding a resin liquid of vinyl acetate and acrylic copolymer resin to this.