JPH0761909B2 - Hydraulic dew-proof filler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is to prevent the deformation of the sash frame and to insulate the sash by filling the voids generated between the concrete and the sash after installing the sash of the RC or SRC building window. The present invention relates to a hydraulic dew-proofing filler having excellent waterproofness and adhesiveness.

[Prior Art] Conventionally, mortar is generally filled in voids generated after sash installation of RC and SRC building windows. In addition, mortar mixed with crushed polystyrene foam and sand is also used in part.

[Problems to be Solved by the Invention] However, in the method of filling mortar normally, the concrete in the upper part of the sash causes strain due to the creep phenomenon in which the strain increases with the passage of time under a constant load,
The strain is directly transmitted to the sash frame through the mortar and leads to deformation. That is, it does not have a proper spring rigidity against the creep phenomenon and is inferior in the ability to absorb and absorb strain. This problem is particularly common in the case of continuous windows with continuous sashes. In addition, after filling, before the resin hardens, it sinks and the adhesion to the sash or concrete is significantly deteriorated, and heat insulation cannot be expected.

On the other hand, there is a problem of the above-mentioned creep phenomenon also in mortar in which crushed polystyrene products are mixed. Further, when the styrene foam pulverized product is significantly crushed during kneading due to the inclusion of sand having a large specific gravity, the unit volume weight after kneading is increased. Therefore, the weight reduction of the mortar is hindered and the heat insulation performance is also deteriorated.

Further, in the conventional technique, the mortar is inferior in waterproofness and water resistance and causes water to enter, the mortar expands, and shrinkage occurs in the drying process with the lapse of time, causing peeling and cracking. Furthermore, since the adhesiveness is weak, the mortar discharged from the inside of the filling device has no stickiness and cannot easily adhere to the concrete and the sash frame, causing the mortar to fall off and peel off.

As described above, the mortar in which the normal mortar and the crushed styrene foam are mixed is inferior in the ability to alleviate the creep phenomenon. In addition, the heat insulating property was poor, which also caused dew condensation on the indoor side.

In order to improve this problem, heat insulation performance is also maintained by attaching a heat insulating material such as foamed phenol or urethane foam plate to the inside of the filled mortar, or by blowing urethane foam. However, there is a problem in that a large amount of labor is spent on the construction and the construction cost becomes expensive.

The present invention overcomes the above difficulties and prevents deformation of the sash frame,
It is an object of the present invention to provide a hydraulic dew-proofing filler which exhibits excellent effects on heat insulation, waterproofing and adhesion.

[Means for Solving the Problems] The inventors of the present invention have conducted intensive studies in view of such problems, and as a result, have used a cement with a foamed synthetic resin, a methylcellulose-based additive, and a fatty acid aluminum-based additive whose shape has been adjusted. Found that these problems can be solved.

That is, the present invention relates to 100 parts by weight of cement, 3 to 12 parts by weight of a foamed synthetic resin whose shape is adjusted, 0.05 to 0.3 parts by weight of a methylcellulose-based additive, and a fatty acid aluminum-based additive.
The present invention relates to a hydraulic dew-proofing filler, which comprises kneading a mixture of 0.7 to 4 parts by weight in the presence of 40 to 70 parts by weight of water.

The foamed synthetic resin whose shape has been adjusted above has a maximum size of 10 mm.
Then, expanded polystyrene having a shape ratio of spherical 40 to 60% by volume, flat shape 20 to 40% by volume, and uneven shape 10 to 30% by volume is suitable.

If the maximum dimension exceeds 10 mm, the affinity with cement is remarkably deteriorated and it is difficult to manufacture the filler. When the maximum size is 3 mm or less, the fine grain is notably reduced, the unit volume weight of the filler is increased, the weight cannot be reduced, and the heat insulating property is deteriorated.

Further, when the above-mentioned expanded polystyrene is out of the mixing range or when the shape is limited to only one type, the performance required as a filler is insufficient, which is not preferable. From the viewpoint of improving the performance of the filler, the mixing ratio is particularly preferably spherical 50% by volume, flat 30% by volume, and uneven 20% by volume.

As the foamed synthetic resin, foamed polyurethane or foamed polyethylene may be used in addition to foamed polystyrene.

Among the expanded polystyrene according to the present invention, spherical ones are
It has excellent elasticity and fluidity and can be made lightweight. Further, the flat shape acts as a fiber to control expansion and contraction. Further, the uneven shape has performances such as improvement of adhesion.

By mixing and using these at a fixed ratio, it is possible to improve the resilience, heat insulation, volume change suppressing adhesion, etc. of the filler itself.

Therefore, the filler of the present invention has an elastic modulus of 1/5 that of conventional products.
The strain due to the creep phenomenon is very small and the elasticity is excellent. In addition, the specific gravity can be reduced to 1/3 and the thermal conductivity is 1/5, which is also excellent in heat insulation performance.

The amount of foamed synthetic resin used is 3 for 100 parts by weight of cement.
It is -12 parts by weight, preferably 5-9% by weight.

If the amount used is less than 3 parts by weight, the weight of the filler itself increases and the heat insulating property deteriorates. In addition, it is difficult to absorb the strain due to lack of elasticity as well as labor required for the filling work.

If the amount used exceeds 12 parts by weight, the filler becomes rough and the fluidity is significantly lost, and the filler does not reach every corner of the void. Therefore, a gap is generated inside the void, water is easily introduced, and the heat insulating property is deteriorated.

On the other hand, the additive is preferably a methylcellulose-based additive that contributes to performance such as adhesion and workability, and a fatty acid aluminum-based additive that is excellent in waterproof and water resistance. The addition amount of the former is 0.05 to 0.3 parts by weight with respect to 100 parts by weight of cement, but 0.08 to 0.
15 parts by weight is particularly preferred. The latter is 0.7 to 4% by weight with respect to 100 parts by weight of cement, but 1 to 2 parts by weight is particularly desirable.

In the former case, if the addition amount is less than 0.05 parts by weight, the tackiness is lost and the construction cannot be facilitated. On the other hand, if it exceeds 0.3 parts by weight, the tackiness increases and the kneading operation and filling operation cannot be performed smoothly.

Regarding the latter, if the amount added is less than 0.7 parts by weight,
Poor water resistance and significantly increase water penetration. Further, even if it exceeds 4 parts by weight, it is not economical because it cannot be expected to have a certain level of waterproof and water resistant effects.

In the method for producing a filler according to the present invention, it is preferable that a foamed synthetic resin having a maximum dimension of 10 mm, the shape of which is adjusted in advance, and a methylcellulose-based additive are put into a plaster mixer and kneaded until both are sufficiently mixed. Next, the cement is added, and the foamed synthetic resin that is sufficiently mixed with the additive is kneaded until it uniformly wraps, and then the fatty acid aluminum-based additive is added at the same time as water, and the softness is easy to fill. It is preferable to carry out kneading so that Examples of the cement used in the present invention include Portland cement, alumina cement, blast furnace cement, fly ash cement and silica cement.

[Function] It is not clear why the sash frame is prevented from being deformed and a filler excellent in heat insulation, waterproofing, and adhesiveness can be produced by the combined use of a foamed synthetic resin whose shape is adjusted, a methylcellulose-based additive, and a fatty acid aluminum-based additive. However, it is considered that by blending foamed synthetic resins having different shapes, the engagement with the cement paste is improved and the elasticity and adhesiveness are improved. Further, it is presumed that the use of the additive increases the viscosity, the cement paste uniformly wraps the foamed synthetic resin whose shape has been adjusted to enhance the affinity, and forms the filler as a viscous body.

Hereinafter, the present invention will be described with reference to examples.

The details of the materials used are shown in Table 1.

Example-1. 8% by weight of expanded polystyrene having a maximum size of 10 mm and 0.1% by weight of methylcellulose-based additive mixed in a ratio of 50% by volume of spherical, 30% by volume of flat, and 20% by volume of unevenness to 100 parts by weight of cement. % Was put in a plaster mixer and kneading was performed until the expanded polystyrene and the additive were sufficiently kneaded. Next, the cement is added, and the expanded polystyrene sufficiently mixed with the additive is kneaded for 1 minute until the cement is uniformly wrapped. Then, 2% by weight of fatty acid aluminum-based additive and water
50% by weight was added at the same time and kneading was carried out so that the softness was such that filling was easy, and a filler was prepared.

Next, a molded body of this filler was prepared and the compressive strength (JISA1132
(The same applies to the following), thermal conductivity (JISA1412), water permeability test (JISA1404), water absorption rate (JISR5201), adhesion test (Japan Housing Corporation "Performance criteria for plaster mortar admixture (draft)"), dry Shrinkage (JISA1129), elastic modulus (ASTM46
9) was measured.

Example-2. The mixing ratio of expanded polystyrene is spherical 40% by volume, flat 20
A filler was prepared and measured in the same manner as in Example 1 except that the content of the filler was 30% by volume, the amount of the protrusions and recesses was 30% by volume, and the amount used was 5 parts by weight based on 100 parts by weight of cement.

Comparative Example-1 Example-1 except that an expanded polystyrene crushed product was used.
A filler was prepared and measured in the same manner as in.

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

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

Comparative Example-4. A filler was prepared and measured in the same manner as in Example-1 except that the expanded polystyrene had a spherical shape only.

Comparative Example-5. A filler was prepared and measured in the same manner as in Example-1, except that the expanded polystyrene was only flat.

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

Table 2 shows the above measurement results.

The following can be seen from Table 2.

The filler of the present invention has a particularly small elastic modulus of 29000 kg / cm ² , which is 1/5 of that of Comparative Example 2 of the prior art, and is excellent in elasticity for absorbing strain.

In addition, the thermal conductivity is 0.161 kcal / mh ° C, which is 1/5, and the heat insulation performance is excellent.

When the amount of the additive was reduced as in Comparative Example 3, the filler was rough and the voids were large, and the water absorption rate was as large as 7.2 wt%.
The adhesive strength is also low at 5.4 kg / cm ² .

Further, by adjusting the shape of the expanded polystyrene to be spherical, flat, or uneven, and mixing them at a constant ratio, the elastic modulus and the thermal conductivity are higher than those of Comparative Examples 1, 4, 5 and 6 which are not adjusted or have a single shape. , Drying shrinkage, etc. are remarkably improved.

[Effects of the Invention] The present invention relates to a hydraulic dew-proofing filler which is filled in a void generated between concrete and a sash after a sash is attached to a window of a building. According to the present invention, by using a foamed synthetic resin whose shape is adjusted, and an additive together, the drawbacks of conventional fillers are overcome and deformation of the sash frame is prevented, and heat insulation, waterproofing,
It is possible to provide a filler having excellent adhesiveness and the like.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a mounted state of a sash using the filling material of the present invention. 1. Hydraulic dew-proof filler, 2. Window sash frame, 3. RC and SRC,
4. Insulation material, 5. Interior material, 6. Mortar, 7. Tiles

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display area C04B 24:04)

Claims (2)

[Claims] 1. 100 parts by weight of cement, 3 to 12 parts by weight of a foamed synthetic resin whose shape is adjusted, and a methylcellulose-based additive.
05-0.3 parts by weight and fatty acid aluminum-based additive 0.7-4
A hydraulic dew-proofing filler, which comprises kneading a mixture consisting of 40 parts by weight and 40 parts by weight of water in the presence of 40 parts by weight of water. 2. The foamed synthetic resin is composed of spherical 40 to 60% by volume, flattened 20 to 40% by volume and unevenness 10 to 30% by volume, and the maximum dimension thereof is 10 mm. A hydraulic dew-proof filler according to item (1).