JP2992876B2 - Plate-like elastic mortar product and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a plate-like elastic mortar product which is rich in flexibility and water tightness, can be easily manufactured even on site, and can be used as a material for construction and construction, and a method of manufacturing the same. It is about the field.

[0002]

2. Description of the Related Art Conventionally, elastic mortar, which is used as a waterproofing material for a building in the civil engineering and construction fields, a repair material, and a protective material for a concrete building by mixing water with a mixture of cement, fine aggregate and an acrylic polymer emulsion, is known. For example, JP
It is known as described in JP-A-9-13685 or JP-A-63-55143.

[0003] By the way, Portland cement
After uniformly mixing a high-temperature calcined artificial aggregate that does not contain fine aggregate that easily causes an alkali-aggregate reaction, an acrylic modified emulsion mainly containing styrene-butadiene as a polymer is added to the Portland cement in an amount of 0.1%. 5 to 10% by weight, and then a mixture of activated alumina composed mainly of amorphous active silica in a proportion of 0.5 to 15% by weight based on the Portland cement, and 20 to 35% by weight of water Kneading while adding, the above-mentioned Portland cement and the addition of the hydration reaction retarder and fluidizing agent were mixed by a rocking type diffusion mixer, and then by a screw kneader having a vacuum deaerator. After kneading, it can be used as a structural material for construction and civil engineering by extruding and then press-molding a panel with a roll rolling machine, or a panel formed by a pressure-forming machine. , Mechanical properties, method for producing a panel according to the heat resistance, polymer cement mortar with thermal insulation is described in JP-A-62-21743.

In addition, mixing these in a volume ratio of cement 1: aggregate such as sand 1: water-based polymer (emulsion) 2; and mixing the mixture of the above-mentioned aggregate and water-based polymer at a predetermined temperature and a predetermined air volume. Agitating in a state where the air is allowed to flow, mixing cement when the water content of the mixture reaches a predetermined amount, and the cement,
A method for producing a thick elastic mortar, which comprises extruding a mixture comprising an aggregate and an aqueous polymer at a predetermined pressure, is described in JP-A-6-80458.

[0005]

The elastic mortars described in JP-A-59-13685 and JP-A-63-55143 are used for waterproofing, repairing and repairing materials in the field of civil engineering and construction. It is used as a protective material for concrete skeletons and cannot be formed into a plate.

A polymer cement mortar panel which can be used as a structural material for construction and civil engineering, manufactured by the manufacturing method described in Japanese Patent Application Laid-Open No. 62-21743, is compared with a conventional cement mortar product. ,
It is a blend containing a large amount of cement and a small amount of aggregates, and those described in the above-mentioned publications are the defects caused by cement such as expansion and contraction, water absorption, water permeability, bending strength and the like. In order to compensate for this, a material made of a polymer or other materials is added to obtain a higher quality cement mortar panel, and the panel itself is a rigid body and not an elastic body.

[0007] Further, Japanese Patent Application Laid-Open No. 6-80458 discloses that the water content in a polymer is simply regarded as water, and sand and a polymer are mixed to remove water as a component of the polymer into water. By setting the cement weight ratio to 35%, the water content in the polymer component is reduced from 55% to 17.5%, and the polymer has already been changed into a resin, that is, has a high viscosity. In addition to the problem that it is difficult to add and stir and mix the cement, there is also a problem that the amount of the aqueous polymer contained in the mortar is large and the production cost is increased.

[0008] The present invention solves the problems of the prior art, has excellent elasticity, watertightness, waterproofness, soundproofing, flame retardancy and heat insulation, and can be easily joined to concrete structures and the like. It is an object of the present invention to provide an inexpensive plate-like elastic mortar product that can be easily used as a material for civil engineering and construction, in which the outer surface can be easily painted and colored.

The present invention is intended to provide a uniform, high-quality elastic plate-like body having any thickness and shape with no product variation, even on site, with water other than the water in the aqueous polymer, such as river water or water. An object of the present invention is to provide a method for producing a plate-like elastic mortar product having high elasticity and water tightness, which can be easily and inexpensively produced without using tap water.

[0010]

According to the present invention, there is provided a plate-like elastic mortar product according to the present invention, wherein the particle size is set according to the thickness of the product. Fine aggregate adjusted to be in the range 2.25-
2.36 parts by weight, 1.0 part by weight of Portland cement, and 0.96 parts by weight of an aqueous polymer of 54.5% by weight of an acrylic resin and 45.5% by weight of water are kneaded with only the water content in the aqueous polymer. 0.2 to 0.8 kg of mortar
/ Cm ^{2 at} a pressure of a plate.

The size of the fine aggregate in the plate-like elastic mortar product according to the present invention is such that the maximum size of the screen is smaller than 1/4 of the thickness of the formed plate-like elastic mortar product. .

The plate-like elastic mortar product according to the present invention is used for a wall material, a floor material, a ceiling material, a roof material, a concrete slab material, and a slab concrete of a building.

In order to achieve the above object, the method for producing a plate-like elastic mortar product according to the present invention is characterized in that the particle size is within a standard range of a particle size distribution curve of fine aggregate set according to the product thickness. After adjusting the particle size of the fine aggregate to a certain extent, the fine aggregate is dried by heating at 70 ° C. to 80 ° C. to form the fine aggregate 2.2.
5 to 2.36 parts by weight are kneaded with 1.0 part by weight of Portland cement, and then the kneaded product is mixed with 54.5 acrylic resin.
After mixing with 0.96 parts by weight of an aqueous polymer of 45.5% by weight of water and 45.5% by weight of water, the kneaded product is filled in a mold, and then 0.2 to 0.2% by weight.
After pressure-molding into a plate at a pressure of 0.8 kg / cm ² , it is cured and demolded.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described with reference to the following examples. Fine aggregates made of river sand, mountain sand, crushed quarry sand, etc. are heated to 70 ° C. to 8 ° C. by a rotary heating dryer or the like.
It is heated and dried at 0 ° C, and is divided into three types according to the thickness of the product as shown in the fine aggregate particle size table shown in Table 1 and the particle size distribution curve shown in FIG. For example, for those of 8 mm or less, fine-grained fine aggregate A,
When the thickness of the product is 8 mm to 16 mm, the fine particle aggregate is adjusted to have the particle size distribution shown in B, and when the product is thick, for example, 16 mm or more, the fine particle aggregate is adjusted to have the particle size distribution shown in C. As shown in Table 1 and FIG. 1, it is assumed that all of the fine-grained fine aggregate A, the fine-grained fine aggregate B, and the fine-grained fine aggregate C are within the standard range of the fine-grained fineness of the fineness standard specification. In order to maintain the high quality and make the quality uniform, elasticity is imparted.

[Table 1]

[0015] The fine aggregate whose particle size has been adjusted has a fine aggregate of 2.25 to 1.0 parts by weight of Portland cement.
It is blended to be 2.36 parts by weight. The two were kneaded and mixed, and the resulting kneaded product was mixed with an aqueous polymer of 54.5% by weight of an acrylic resin and 45.5% by weight of water, that is, the compounding ratio of the solid content of the aqueous polymer was 1.0% of Portland cement.
0.47 to 0.53 parts by weight with respect to parts by weight, water other than water in the aqueous polymer, for example, without using river water or tap water, and using any additives The amount of water contained in the aqueous polymer is 40 to 45% by weight, that is, the water content is only 0.38 to 0.43% by weight based on 1.0 part by weight of Portland cement. The mixture is kneaded with a known mixer (not shown) using only the water content of the aqueous polymer which is blended so as to become a part.

The weight ratio of the plate-like elastic mortar product according to the present invention to the total weight of cement, polymer, fine aggregate, and water in the above mixing ratio is 23.7% for cement and 11% for polymer. .9%, fine aggregate is 5
4.9% and the water content is 9.5%, and the weight ratio of water cement at this time is 40%.

The kneaded mortar is filled in a mold (not shown) having a size corresponding to the length, width and thickness of the plate to be formed, and until the surface of the mortar is no longer viscous. After indoor curing, 0.2-0.8kg from the top
/ Cm ² is uniformly applied to form a thick plate or a thin plate of a predetermined size under pressure.
After being indoor-cured at 0 ° C to 40 ° C, it is removed from the mold and naturally cured for a predetermined time to complete a plate-like elastic mortar product.

By making the maximum size of the mesh of the mesh screen used for sieving the fine aggregate smaller than 1/4 of the thickness of the formed plate-like elastic mortar product, Is conducive to elasticity.

Next, a description will be given of a test method performed on the plate-like elastic mortar product obtained by the above-described manufacturing method and a result thereof. Adhesion strength test is JIS A62
03, 8.7 (3), a test piece of a plate-like elastic mortar product (polymer cement mortar) was used for an adhesive strength test, and a base plate of a mortar plate (70 × 70 × 20 mm) and a plywood ( Five pieces each bonded to a base plate (70 × 70 × 12 mm) were allowed to stand in a test room at a temperature of 20 ° C. and a humidity of 60% ± 5% for one week or more, and then tested.

Table 2 shows the results of the above test. According to Table 2, the average value of the adhesive strength between the plate-like elastic mortar product and the plywood is 0.53 N / mm ² {5.40 kgf / cm ² }, whereas that of the mortar plate is 0.66 N / mm ^2. mm ²
It can be seen that {6.73 kgf / cm ² }, which is about 1.25 times the adhesive strength. Looking at the state of destruction of the base plate, the plywood has an interface and the inside of the plywood has various peeling conditions, whereas the mortar plate has only the inside of the test piece. This indicates that the adhesive strength of the plate-like elastic mortar product is large both for the mortar board and for the plywood.

[Table 2]

The bending resistance test was performed as shown in FIG.
Using three cylinders 18 of 3 mm, 25 mm, and 30 mm,
A plate-like elastic mortar product 1 of the same composition as a test specimen having a width of 300 mm, a length of 600 mm and a thickness of 6 mm was placed on the cylinder 1
8 was bent in the directions of arrows A and A along the outer circumference
This was done by observing the condition of the surface. As a result, as shown in Table 3, a crack was generated on the surface of the test piece 1 after bending when the diameter of the cylinder 18 was 23 mm, but the diameter was 25 m.
After bending, the cylinder 18 of m and 30 mm had no abnormality on the surface of the test piece 1. From the results of this test, it is understood that the test body, that is, the plate-like elastic mortar product 1 has flexibility and elasticity not found in conventional mortar products.

[Table 3]

The water absorption test was carried out on a plate-like elastic mortar product as a test body according to JIS A6203 8.8. The test was carried out by immersing the specimen in water for 48 hours.
The mass was measured.

[Table 4]

According to the test results in Table 4, the water absorption of the plate-like elastic mortar product is 1.11%, which is smaller than the water absorption of a normal mortar plate of 8.0%.

In the water permeability test, a plate-shaped elastic mortar product, which is a test sample, was measured for water flow 24 hours after water injection using a water-permeable device specified in 4.8 of JASS15, M-102. According to the test results in Table 4, the average value is 1.62 ml / 24h, which is much smaller than the standard water permeability of cement mortar of 24.0 ml / 24h.

In the impact resistance test, a DuPont impact tester was used to test a 1 kg load rod with a height of 30 cm to 50 cm.
m. As a result, as shown in Table 4, there was no abnormality in any of the devices having a falling distance of 30 cm to 50 cm.

In the noise test, the acoustic change of the piano was measured at three points with a plate-like elastic mortar product and without the plate-like elastic mortar product using a Lion NL-04 sound level meter. I went. According to the test results in Table 5, those with the plate-like elastic mortar product were from 3.2 db to 11.6 db as compared with those without the plate-like elastic mortar product.
Has been reduced.

[Table 5]

According to the results of the above tests, the plate-like elastic mortar product according to the present invention has higher elasticity, higher water density, lower water absorption and lower water permeability than conventionally known mortar products. It can be seen that the material is rich in waterproofness, and has sound insulation, sound insulation and vibration insulation.

Since the plate-like elastic mortar product according to the present invention has the above-mentioned properties, the plate-like elastic mortar product which is appropriately colored by painting or the like on the surface of the slab concrete 2 cast as shown in FIG. 1 is laid, and the surface of the slab concrete 2 and the plate-like elastic mortar product 1 are bonded to each other with an adhesive such as an epoxy resin, so that elasticity, heat insulation, impact resistance, sound insulation, and sound insulation are exhibited. It can be used as a material for soil concrete. Reference numeral 7 denotes joints between the plate-like elastic mortar products 1, and the joints are filled with the same mortar material as the plate-like elastic mortar product.

Further, as shown in FIG. 4, a plate-shaped elastic mortar product 1 is laid on the surface of a concrete slab 3 cast, and a decorative floor member 4 such as a flooring is stuck and fixed on the upper surface thereof with an adhesive or the like. Elasticity, heat retention,
It can be used as a material for concrete slab exhibiting impact resistance, sound insulation and sound insulation.

Further, the plate-like elastic mortar product according to the present invention can be easily cut into a size corresponding to the shape and dimensions, and can be easily attached and fixed to wood or the like by nailing, bonding or the like. Therefore, the plate-shaped elastic mortar product 1 is laid on the upper surface of the base plate 6 shown in FIG. 5, and the upper surface thereof is pressed down and fixed by the long aluminum tile rod 5, so that heating, heat insulation, heat insulation, sound insulation, and waterproofness are achieved. It can be used as a roofing material that has fully exhibited the effects of the above.

As shown in FIG. 6, a plate-like elastic mortar product 1 is laid on the upper surface of a floor plate 10 and a floor finishing material 11 is adhered and laid on the upper surface of the mortar product.
It can be used as a floor material exhibiting impact resistance, sound insulation, and sound insulation. In addition, 12 is a joist, 13 is a pull, and 14 is a floor bundle.

Further, as shown in FIG.
Elastic mortar product 1 bonded to an adhesive 17 with adhesive
Can be nailed to the wall plate 9 and fixed by bonding or the like, so that the wall can be provided with sound insulation and soundproofing effects. Reference numeral 16 denotes an interior sheet.

Compared with the conventional one, the one according to the present invention has a small ratio of the solid matter of the aqueous polymer to the water, a small amount of the aqueous polymer, and a large mixing ratio of the fine aggregate. And the production cost of the plate-like elastic mortar is extremely low.

[0034]

The plate-like elastic mortar product according to the present invention comprises:
Solving the problems of the conventional technology, it has excellent elasticity, water tightness, waterproofness, soundproofing, flame retardancy and heat retention, can be easily joined to concrete structures, etc., and paints the outer surface An effect is provided that it can be easily provided at low cost and can be used for various applications related to civil engineering and architecture.

The method for producing a plate-like elastic mortar product according to the present invention is a method for producing a uniform, high-quality elastic plate-like material having any thickness and shape without variation in the product, even in the field, in aqueous polymer. Water, such as river water or tap water, can be easily and inexpensively manufactured.

[Brief description of the drawings]

FIG. 1 is a graph showing the relationship between sieve size and passing weight percentage for explaining the particle size distribution of three types of fine aggregate of a plate-like elastic mortar product according to the present invention.

FIG. 2 is a plan view illustrating a method of a bending resistance test.

FIG. 3 is a cross-sectional view showing a state in which a plate-like elastic mortar product is laid on the surface of soil concrete.

FIG. 4 is a cross-sectional view showing a state in which a plate-like elastic mortar product is laid on the surface of a concrete slab.

FIG. 5 is a cross-sectional view showing a state in which a plate-like elastic mortar product is laid on an upper surface of a roof base plate.

FIG. 6 is a cross-sectional view showing a state in which a plate-like elastic mortar product is laid on the upper surface of a floor plate.

FIG. 7 is a cross-sectional view showing a state in which a plate-like elastic mortar product is bonded and fixed to an inner surface of a wall member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate-like elastic mortar product 2 Slab concrete 3 Concrete slab 9 Wall board 10 Floor board

Claims (4)

(57) [Claims] 1. A weight of 2.25 to 2.36 parts of fine aggregate adjusted to have a particle size within a standard range of a particle size distribution curve of fine aggregate set according to the thickness of a product, and Portland Seme Mortar obtained by kneading 1.0 part by weight of a polymer and 0.96 parts by weight of an aqueous polymer of 54.5% by weight of an acrylic resin and 45.5% by weight of water with only the water content in the aqueous polymer. A plate-shaped elastic mortar product characterized by being formed into a plate by a pressure of 0.8 kg / cm ² . 2. The size of the fine aggregate is such that the maximum size of the sieve is 1 / th of the thickness of the formed plate-like elastic mortar product.
The plate-like elastic mortar product according to claim 1, wherein the product is smaller than 4. 3. A building wall material, floor material, ceiling material, roof material,
The plate-like elastic mortar product according to claim 1 or 2, wherein the plate-like elastic mortar product is used for a concrete slab material and a soil concrete. 4. After adjusting the particle size of the fine aggregate so that the particle size falls within a standard range of the particle size distribution curve of the fine aggregate set according to the thickness of the product, the fine aggregate is reduced to 70%. ° C to 80 ° C
2.25 to 2.36 parts by weight of the fine aggregate is kneaded with 1.0 part by weight of Portland cement, and the kneaded material is made up of 54.5% by weight of an acrylic resin and 45.5% by weight of water. After kneading and mixing with 0.96 parts by weight of the aqueous polymer, the kneaded product is filled in a mold, pressed into a plate at a pressure of 0.2 to 0.8 kg / cm ² , cured, and demolded. A method for producing a plate-like elastic mortar product, comprising: