JPH0333077A - Hydraulic anti-dewing filter - Google Patents

Abstract

PURPOSE:To obtain a hydraulic anti-dewing filler which is excellent in preventing deformation of a sash window frame, heat insulation, water-proofing and adhesive property, etc., by mixing cement, foamed synthetic resin regulated in shape, methyl cellulose and fatty acid aluminum at a specified weight ratio and adding prescribed amount of water to the mixture and kneading them. CONSTITUTION:(A) 100 pts.wt. cement, (B) 3-12 pts.wt. foamed synthetic resin (e.g. polystyrene foam) regulated in a shape, (C) 0.05-0.3 pts.wt. methyl cellulose- based additive and 0.7-4 pts.wt. fatty acid aluminum-based additive are mixed. Then the obtained mixture is kneaded in the existence of 40-70 pts.wt. water to produce a hydraulic anti-dewing filler. Further the component (B) is constituted of 40-60vol.% spherical shape, 20-40vol.% flat shape and 10-30vol.% uneven shape and maximum dimension is properly regulated to 10mm. The obtained filler is utilized for application for filling a gap generated between concrete and the sash after the sash is fitted to the window of a building.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is designed to prevent the deformation of the sash frame and provide heat insulation by filling the voids that occur between the concrete and the sash after installing window sashes in RC and SRC buildings. This invention relates to a hydraulic dew-proofing filler that exhibits excellent waterproofing and adhesion properties.

[Prior Art] Conventionally, when installing window sashes in RC and SRC buildings, it has been common practice to fill gaps that occur later with mortar. In some cases, mortar mixed with crushed Styrofoam and sand is also used.

[Problems to be Solved by the Invention] However, the method of filling with ordinary mortar causes distortion in the concrete above the sash due to a creep phenomenon in which the distortion increases with the passage of time under a constant load.
The strain is directly transmitted to the sash frame through the mortar, leading to deformation. That is, it does not have appropriate spring rigidity against the creep phenomenon, and is inferior in its ability to relax and absorb strain. This problem is especially common in the case of consecutive windows with consecutive satsushi. Furthermore, after filling, the material sinks before it hardens, resulting in significantly poor adhesion to the sash or concrete, and the insulation properties cannot be expected.

On the other hand, mortar mixed with crushed Styrofoam also has the above-mentioned creep problem. In addition, the pulverized polystyrene foam is significantly crushed during kneading due to the inclusion of sand having a large specific gravity, which increases the unit volume weight after kneading. Therefore, it hinders the reduction in weight of the mortar and also reduces the heat insulation performance.

Furthermore, with conventional techniques, the mortar is poor in waterproofness and water resistance, allowing water to enter, causing the mortar to expand, and shrinkage during the drying process over time, resulting in peeling and cracking.

Furthermore, since the adhesiveness is weak, the mortar discharged from the filling machine has no stickiness and cannot easily adhere to the concrete and the sash frame, resulting in IIR drop, peeling, etc.

As described above, ordinary mortar and mortar mixed with pulverized Styrofoam have poor performance in alleviating the creep phenomenon. In addition, the insulation was poor and caused condensation to form inside the room.

In order to improve this problem, heat insulating materials such as foamed phenol or urethane foam boards are installed on the indoor side of the filled mortar, or urethane is sprayed by foaming to maintain heat insulating performance. However, there are problems in that the construction requires a lot of labor and the construction costs are high.

The present invention overcomes the above-mentioned difficulties and prevents deformation of the sash frame.
The object of the present invention is to provide a hydraulic dew-proofing filler that exhibits excellent heat insulation, waterproofing, and adhesion properties.

[Means for Solving the Problems] As a result of intensive research in view of the above problems, the inventors of the present invention have developed a method of using a foamed synthetic resin whose shape has been adjusted, a methyl cellulose additive, a fatty acid aluminum additive, and cement together. We found that these problems could be solved.

That is, the present invention uses 100 parts by weight of cement, 3 to 12 parts by weight of foamed synthetic resin whose shape has been adjusted, 0.05 to 0.3 parts by weight of methyl cellulose additive, and 0.7 to 4 parts by weight of fatty acid aluminum additive. A mixture consisting of 40~
The present invention relates to a hydraulic dew-proofing filler characterized in that it is kneaded in the presence of 70 parts by weight of water.

The foamed synthetic resin whose shape has been adjusted above has a maximum size of 1ON.
R, the shape proportion is spherical 40~6o volume%, flat shape 2
Expanded polystyrene having a composition of 0 to 40% by volume and 10 to 30% of unevenness is suitable.

If the maximum dimension exceeds 1ON11, the affinity with cement will be significantly poor, making it difficult to manufacture the filler.

Fine grains with a maximum dimension of 3 m+ or less are undesirable, as the weight loss is severe and the weight per unit volume of the filler increases, making it impossible to reduce the weight and lowering the heat insulation properties.

Further, if the foamed polystyrene is mixed outside the above-mentioned mixing range or if the shape is limited to only one type, it is not preferable that the necessary performance as a filler is lacking.

As for the mixing ratio, from the viewpoint of improving the performance of the filler, spherical 50
Particularly preferred are 30% by volume of the flat shape and 20% by volume of the uneven shape.

As the foamed synthetic resin, in addition to foamed polystyrene, foamed polyurethane and foamed polyethylene can be used.

Among the expanded polystyrenes according to the present invention, the spherical ones are:
It has excellent elasticity and fluidity, and is also lightweight.

Moreover, the flat ones act as fibers and control expansion and contraction. Furthermore, the uneven surface has properties such as improving adhesion.

By mixing and using these at a certain ratio, the elasticity, heat insulation properties, volume change suppression adhesion properties, etc. of the filler itself can be improved.

Therefore, the filler of the present invention has an elastic modulus of 17 compared to conventional products.
5, it greatly alleviates strain caused by the creep phenomenon and has excellent elasticity. In addition, it is lightweight with a specific gravity of 1/3, and has excellent heat insulation performance with a thermal conductivity of 115.

The amount of foamed synthetic resin used is 3 to 12 parts by weight, preferably 5 to 9% by weight, based on 100 parts by weight of cement.

When the amount used is less than 3 parts by weight, the weight of the filler itself increases and the heat insulation properties decrease. In addition, the filling operation requires a lot of effort, and the material lacks elasticity, making it impossible to absorb strain.

If the amount used exceeds 12 parts by weight, the filler becomes rough and fluidity is significantly lost, making it impossible for the filler to reach every corner of the voids. Therefore, gaps are created inside the voids, which tend to invite water intrusion and reduce the heat insulation properties.

On the other hand, the additives are preferably methylcellulose-based additives that contribute to performance such as adhesion and workability, and fatty acid aluminum-based additives that are excellent in waterproofing and water resistance. The amount of the former is 0.05 to 0.3 parts by weight per 100 parts by weight of cement, but 0.08 to 0.15 parts by weight is particularly preferable. The latter is present in an amount of 0.7 to 4 parts by weight, but preferably 1 to 2 parts by weight, based on 100 parts by weight of cement.

In the former case, if the amount added is less than 0.05 parts by weight, the adhesiveness will be lost and construction will not be easy. Also 0.
If it exceeds 3 parts by weight, tackiness increases and kneading and filling operations cannot be carried out smoothly.

Regarding the latter, if the amount added is less than 0.7 parts by weight, the waterproofness and water resistance will be poor and water penetration will significantly increase. Furthermore, even if the amount exceeds 4 parts by weight, it is not economical to expect a certain level of improvement in waterproofing or water resistance.

In the method for producing a filler according to the present invention, it is preferable to put a foamed synthetic resin whose shape has been adjusted in advance to a maximum size of 10 m and a methylcellulose additive into a plastering mixer, and perform dry kneading until both are sufficiently mixed. Next, add the cement, dry mix the foamed synthetic resin that has been sufficiently mixed with the additives until the cement is evenly coated, and then add the fatty acid aluminum additive at the same time as water to make it soft enough to be easily filled. It is preferable to knead so that the following is achieved. Cement used in the present invention includes portland cement, alumina cement, blast furnace cement, fly ash cement,
Examples include silica cement.

[Effect] It is not clear why a filler that prevents deformation of the sash frame and has excellent heat insulation, waterproofing, and adhesion can be produced by using a foamed synthetic resin whose shape has been adjusted, a methyl cellulose additive, and a fatty acid aluminum additive in combination. However, by blending foamed synthetic resins with different shapes, it is thought that the interlocking with the cement paste is improved and the elasticity and adhesion are improved. It is also assumed that the use of additives increases the viscosity, and that the cement paste uniformly envelops the foamed synthetic resin whose shape has been adjusted, increasing its affinity and forming the filler into a solid body.

The present invention will be explained below with reference to Examples.

Note that details of the materials used are shown in Table 1.

Example-1 8% by weight of expanded polystyrene with a maximum dimension of 10 m mixed with 100 parts by weight of cement in the proportions of 50% by volume of spherical, 30% by volume of flat, and 20% by volume of uneven, and 0.0% of a methyl cellulose additive. 111% was put into a plastering mixer and dry kneaded until the expanded polystyrene and additives were sufficiently kneaded together. Next, cement was added and the foam was heated for 1 minute until the cement uniformly covered the foamed polystyrene that had been thoroughly mixed with the additives. Thereafter, 2% by weight of a fatty acid aluminum additive and 50% by weight of water were simultaneously added and kneaded to obtain a softness that was easy to fill, thereby producing a filler.

Next, a molded body of this filler is produced, and the compressive strength (JISA
1132 (hereinafter the same), thermal conductivity (JISA14
12>, water permeability test (JISA1404), water absorption rate (JI
SR5201), adhesion test (Japan Housing Corporation “Performance Judgment Criteria for Mortar Admixtures for Plastering (draft)”), drying shrinkage (J
ISA1129) and elastic modulus <A37M469).

Table 1 Example-2゜Except that the mixing ratio of polystyrene foam was 40% by volume for spherical, 20% by volume for flat, and 30% by volume for uneven, and the amount used was 5 parts by weight per 100 parts by weight of cement. Example-1
A filling material was prepared and measured using the same method.

Comparative Example-1゜Example-1 except that a pulverized foamed polystyrene product was used.
A filling material was prepared and measured using the same method.

Comparative Example 2 A filler was prepared and measured in the same manner as Comparative Example 1, except that sand was added at the same time as cement.

Comparative Example 3 A filler was prepared and measured in the same manner as in Example 1, except that 0.02 parts by weight of the methyl cellulose additive and 0.5 parts by weight of the fatty acid aluminum additive were added.

Comparative Example-4 A filler was prepared and measured in the same manner as in Example-1, except that the shape of the foamed polystyrene was changed to only a spherical shape.

Comparative Example 5 A filler was prepared and measured in the same manner as in Example 1, except that the polystyrene foam was made into a flat shape.

Comparative Example - A filler was prepared and measured in the same manner as in Example 1, except that the shape of the 6° expanded polystyrene was uneven.

The above measurement results are shown in Table 2.

The following can be seen from Table 2.

The filler of the present invention has an especially small elastic modulus of 29,000 Kg/d, which is 175 compared to Comparative Example 2 of the prior art, and has excellent elasticity for absorbing strain.

Also, the thermal conductivity is 0.161 Kcal/m of 115, h
.

It also has excellent insulation performance at ℃.

When the amount of additive is reduced as in Comparative Example 3, the filler becomes rough and has many voids, the water absorption rate is high at 7.2 wt%, and the adhesion strength is low at 5.4/cm.9/cm. .

In addition, by adjusting the shape of expanded polystyrene to be spherical, flat, and uneven, and blending them at a constant ratio, the elastic modulus and thermal conductivity were lower than those of Comparative Example 1.4.5.6 with unadjusted or single shape. , drying shrinkage, etc. are significantly improved.

[Effects of the Invention] The present invention relates to a hydraulic dew-proof filler that fills the voids that occur between the concrete and the sash after the sash of a building window is installed. According to the present invention, by using a foamed synthetic resin whose shape has been adjusted in combination with additives, the drawbacks of conventional fillers can be overcome, and the deformation of the sash frame can be prevented, and insulation, waterproofing, and
A filler with excellent adhesion and the like can be provided.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing how a sash is installed using the filler of the present invention. 1. Hydraulic dew-proofing filler, 2. Window sash frame, 3, R
C and 5RC14, insulation material, 5, interior material, 60 mortar, 7, tile

Claims (2)

[Claims] (1) 100 parts by weight of cement, 3 to 12 parts by weight of foamed synthetic resin whose shape has been adjusted, and 0.00 parts by weight of methyl cellulose additive.
05-0.3 parts by weight and fatty acid aluminum additive 0
．． 7 to 4 parts by weight of water is kneaded in the presence of 40 to 70 parts by weight of water. (2) The foamed synthetic resin is composed of 40 to 60 volume percent spherical, 20 to 40 volume percent flat, and 10 to 30 volume percent uneven, and the maximum dimension thereof is 10 mm. Hydraulic dew-proofing filler described in section 1).