JPH05238801A - Quick hardening colored waterproofing composition - Google Patents

Abstract

PURPOSE:To provide the subject quick hardening colored waterproofing composition containing alumina cement, a pigment, an aggregate and an organic polymer substance in a specified compounding ratio, excellent in elasticity and adhesion and capable of following expansion of the ground sufficiently enough to exhibit an excellent crack resistance and of being colored. CONSTITUTION:A quick hardening colored waterproofing composition containing alumina cement, a pigment, an aggregate and an organic polymer substance and the above quick hardening colored waterproofing composition of >=50 whiteness. If the above composition is used, quick hardening properties, workability, strength and elasticity are improved in comparison with the conventional material, generation of warpage or crack is remarkably reduced and an effect such as strong adhesion is also obtained. Accordingly, this composition is useful for a floor material, a waterproofing, an adhesive, a decorative-finishing material, a maintenance material, an anticorrosive material, a paving material, a cut-off material, a polymer cement product, etc., mainly in the fields of civil engineering and architecture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rapid hardening colored waterproof material composition, more specifically, alumina cement, pigment, aggregate,
And a rapid-hardening colored waterproof material composition in which an organic polymer substance is mixed in a specific blending ratio, which is excellent in elasticity and adhesion, and is excellent in crack resistance due to the ability to follow the elongation of the base,
The present invention relates to a rapidly hardenable colored waterproof material composition that can be colored.

Industrially applicable fields of the present invention include flooring materials, waterproofing materials, adhesive materials, decorative finishing materials, repair materials, anticorrosion materials, pavement materials, polymer cement products, and retaining materials mainly in the field of civil engineering / construction materials. Examples include water materials.

[0003]

2. Description of the Related Art Generally, polymer cement mortar obtained by mixing a polymer emulsion with Portland cement is known (Japanese Patent Publication No. 1-39713, Japanese Patent Publication No. 1-39713).
54294, Japanese Patent Publication 1-54295, and Japanese Patent Publication 2-1011
No. 2, etc.)

These polymer cement mortars have excellent water resistance and are usually used mainly for protecting the surfaces of buildings such as inner walls, outer walls and floor materials (Japanese Patent Publication No. 1-39713). Bulletin).

However, there are problems that the curing time is long, cracks and cracks are likely to be formed in the mortar after curing, the adhesive force to the base concrete is weak, and the mortar cannot be colored (Japanese Patent Publication No. 2-10112).

It is considered that the causes of these problems are largely due to the physical properties of the cement itself, and that the cements in which pigments can be used are limited.

As a result of various studies, the present inventors have overcome and solved the problems of the above-mentioned prior art by using a specific material, and have a balance between the curing rate of polymer and the hydration reaction rate of cement. The present invention has been completed by finding that it is possible to obtain a rapidly hardened colored waterproof material composition which can be colored while being improved in binding force of a cured product by operation and which is excellent in rapid hardening property, elasticity and adhesive force.

[0008]

Means for Solving the Problems That is, the present invention is a rapid-hardening colored waterproof material composition containing an alumina cement, a pigment, an aggregate, and an organic polymer, and the whiteness of the alumina cement is 50%. The rapid-hardening colored waterproof material composition is as described above.

The present invention will be described in detail below.

The alumina cement according to the present invention is one in which bauxite, high-alumina and refined alumina are used as the alumina source and limestone or quick lime is used as the calcia source, and CaO.Al ₂ O ₃ in the product is used. It is prepared by crushing the cement clinker melted or fired in an electric furnace, a reverberatory furnace, an open furnace, a rotary kiln, etc.

Alumina cement is mainly composed of CaO / Al.
Include ₂ O _{3, other, 12CaO · 7Al 2 O 3,} CaO · 2Al 2 O 3, 3CaO ·
Contains minerals such as 5Al ₂ O ₃ , 5CaO ・ 3Al ₂ O ₃ , and 2CaO ・ Al ₂ O ₃・ SiO ₂ , and α-Al ₂ O ₃ , 4CaO ・ Al ₂ O ₃ as other components
· Fe ₂ O _3, and those containing CaO · TiO _2, etc. may be mentioned.

Commercially available products of alumina cement are trade names "alumina cement 2", "alumina cement 1", "alumina cement 1 NEO", "alumina cement 1D", "high" manufactured by Denki Kagaku Kogyo Co., Ltd. Alumina cement ”,“ high alumina cement NEO ”,“ high alumina cement D ”,“ high alumina cement # 80 ”,“ high alumina cement F ”,“ high alumina cement super ”,“ high alumina cement super 2 ”,“ high ” Alumina Cement Super 90 "," High Alumina Cement Super G "," High Alumina Cement Super F ", etc., Alcoa product names" CA-14 "," CA-15 "," CA-25 "," CA- " 25 type C ”,“ CA-25 type G ”, etc., manufactured by Lafarge Co., Ltd. under the trade names“ Secal 80 ”,“ Secal 70 ”,“ Secal 71 ”,“ Secur Lumpur 5
Product name "1" or "2" manufactured by Nippon Cement Co., Ltd., product name "1" or "Asahi Glass Co., Ltd.""Fonju" and the like can be used.

In particular, an alumina cement having a whiteness of 50 or more is excellent in colorability. Here, the whiteness of the alumina cement indicates the degree of whiteness of the alumina cement, and is measured using, for example, a Hunter whiteness meter which is a photoelectric colorimeter.

As the pigment according to the present invention, the same pigments as those used for ordinary cement mortar and concrete can be used. Specifically, synthetic iron oxide, chromium oxide, lead chromate, phthalocyanine blue, cobalt blue, carbon black, titanium oxide and the like can be used. The pigment preferably has a median particle size of 1 μm to 50 μm.

The amount of the pigment used is preferably 0.1 to 20 parts by weight, more preferably 1 to 5 parts by weight, based on 100 parts by weight of alumina cement. If it is less than 0.1 part by weight, sufficient color cannot be obtained, and if it exceeds 20 parts by weight, rapid hardening cannot be obtained and the adhesive force tends to be lowered.

As the aggregate according to the present invention, the same fine aggregate or coarse aggregate as that used for ordinary cement mortar or concrete can be used. Specifically, river sand,
Crushed stone, crushed sand, silica sand, colored sand, and artificial lightweight aggregate can be used. Silica-based silica sand is preferably used for the purpose of anticorrosion, and the particle size thereof is preferably JIS 6-8.

The amount of aggregate used is preferably 50 to 300 parts by weight, and more preferably 100 to 200 parts by weight, based on 100 parts by weight of alumina cement. If it is less than 50 parts by weight, sufficient strength cannot be obtained and shrinkage, cracks, cracks and the like are likely to occur, and if it exceeds 300 parts by weight, rapid hardening cannot be obtained and the adhesive force tends to be lowered.

As the organic polymer substance according to the present invention, an aqueous polymer dispersion, a re-emulsified powder resin, a water-soluble polymer, a liquid polymer and the like can be used, and ordinary commercial products can be used. Specific examples of organic polymer substances include:
Natural rubber latex (NR), chloroprene rubber (CR), styrene butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR), methyl methacrylate butanediene rubber (MB
R), synthetic rubber latex such as butadiene rubber (BR), polyacrylic acid ester (PAE), polyvinyl acetate (PV
AC), vinylidene chloride (PVDC), polyvinyl propionate (PVP), ethylene vinyl acetate (EVA), polypropylene (PP) and other thermoplastic resin emulsions, epoxy resin and other thermosetting resin emulsions, asphalt And bituminous emulsions such as rubber asphalt, mixed dispersions such as mixed latex and mixed emulsion, re-emulsified powder resins such as ethylene vinyl acetate (EVA) and vinyl acetate vinyl versatate (VAVeoVA), and further cellulose derivatives, Water-soluble polymers such as polyvinyl alcohol (PVA, poval), polyacrylic acid salts and furfuryl alcohol, and liquid polymers such as unsaturated polyester and epoxy can be used. Among them, EVA emulsion is preferable as the organic polymer substance because it is excellent in waterproof property, workability, and durability.

The amount of the organic polymer used is preferably 5 to 300 parts by weight with respect to 100 parts by weight of alumina cement,
-100 parts by weight is more preferred. If the amount is less than 5 parts by weight, sufficient elasticity and adhesive force cannot be obtained and the water resistance is poor. On the other hand, if it exceeds 300 parts by weight, elasticity is improved but curing is delayed and strength and durability tend to be deteriorated.

As described above, the mixing ratio of the pigment, the aggregate and the organic polymer substance to 100 parts by weight of alumina cement is 0.1 to 20 parts by weight, 50 to 300 parts by weight and 5 to 30 parts by weight, respectively.
0 parts by weight is preferable, 1 to 5 parts by weight, 100 to 200 parts by weight,
And 10 to 100 parts by weight is more preferable. If it is out of this range, the curing rate of the polymer and the hydration reaction rate of the cement cannot be well balanced, and sufficient, rapid hardening, strength, elasticity,
Also, it is difficult to obtain adhesive strength, it is difficult to prevent shrinkage, cracks, cracks and the like, and there is a tendency that sufficient color cannot be obtained.

In order to produce a quick-hardening colored waterproof material composition using each of the above-mentioned materials, it is usually sufficient to mix each powdery non-material and then add an organic polymer substance and, if necessary, water. Knead. As a mixing method or a kneading method, a generally used method is used, but it is preferable to premix the alumina cement and the pigment in advance in terms of occurrence of color unevenness.

As described above, according to the present invention, the occurrence of cracks and cracks is extremely small, and the rapid hardness, elasticity, adhesive force,
A mortar that is excellent in strength and strength and that can be colored is obtained.

In the present invention, one of the reasons for obtaining such an excellent mortar is that the curing rate of the polymer and the hydration reaction rate of the cement are well balanced.

Further, in the mortar adjusting step, CaO
Al ₂ O ₃・ 10H ₂ O, 2CaO ・ Al ₂ O ₃・ 8H ₂ O, and 3CaO ・ Al ₂ O ₃・ 6H ₂ O
It is inferred that hydrates such as That is, CaO ・ Al
₂ O ₃・ 10H ₂ O and 2CaO ・ Al ₂ O ₃・ 8H ₂ O are plate-like crystals, and 3CaO ・
Al ₂ O ₃ .6H ₂ O is a cubic crystal. Then, a polymer film is formed in the gap between these hydrates and aggregates, so that hydration of the cement and formation of the polymer phase simultaneously proceed,
It is considered that an integrated matrix phase having a reticulated structure is formed, and the elasticity, rapid hardening, adhesive force, strength, etc. are excellent, and the occurrence of cracks and cracks is significantly reduced.

[0025]

EXAMPLES The present invention will be further described below based on examples.

Example 1 Using the formulations shown in Table 1, the water-cement ratio was set to 0.7, and 20
The mixture was kneaded in a mortar mixer for 3 minutes in a thermostatic chamber at 0 ° C. to prepare polymer cement mortar, and the flow value, curing time, tensile strength, elongation rate, and adhesive strength were measured, and the mortar properties were determined. The results are also shown in Table 1.

<Materials used> Alumina cement: trade name “Alumina cement No. 1” manufactured by Denki Kagaku Kogyo Co., Ltd. Pigment a: “Iron oxide” manufactured by Nippon Benji Kogyo Co., Ltd. Aggregate: Toyoura standard sand Organic polymer α: Electrochemistry Product name "EVA83" manufactured by Kogyo Co., Ltd. Main ingredient: Ethylene vinyl acetate

<Measurement method> 1) Flow value This is a method for measuring the softness and fluidity of polymer cement mortar. A flow cone is placed in the center of a flow table plate, polymer cement mortar is packed in this flow cone, and then The flow cone is removed upwards and the extent of polymer cement mortar mortar is measured. To measure the spread, firstly, the diameter that is recognized as the longest and the diameter that is perpendicular to the longest diameter were measured in two directions, and the average value was expressed in mm, which was used as the flow value. 2) Curing time Place a polybeaker containing polymer cement mortar in an adiabatic container, insert a resistance thermometer, measure the exothermic curve with a recorder, and measure the time from the start of kneading until the exothermic curve reaches its peak. The curing time was used. 3) Tensile Strength and Elongation Rate Polymer cement mortar was molded into a size of 100 × 25 mm and a thickness of 2 mm to obtain a cured product. Ten days later, the tensile strength and elongation were measured using a tensile tester. 4) Adhesive strength Polymer cement mortar on steel plate 100 × 25mm, thickness 2m
It was molded into a size of m to obtain a cured product. The adhesive strength was measured using a tensile tester at the age of 7 days. 5) Property Judgment Properties such as warpage, cracks, and cracks of the cured product were judged visually and by touch. As for the property, the good condition was ◯, the bad condition was ×, and the middle condition was Δ.

[0029]

[Table 1]

As is clear from Table 1, the quick-hardening colored waterproof material composition of the present invention is excellent in elasticity and adhesiveness and has less warpage and cracks. In addition, the curing time is fast, the tensile strength and the elongation rate are large, and coloring is possible. On the contrary, the waterproof material compositions of Comparative Examples have a slow curing time, low tensile strength, poor elasticity and adhesiveness, and tend to cause warpage and cracks. Thus, by blending the rapid-hardening colored waterproof material composition of the present invention, the curing time can be shortened, and further, the elasticity and the adhesiveness are excellent, and the warpage and cracks are reduced.

Example 2 The procedure of Example 1 was repeated except that the formulation shown in Table 2 was used. The results are also shown in Table 2.

Example 3 100 parts by weight of alumina cement, 5.0 parts by weight of pigment, 100 parts of aggregate
Parts by weight, and using a blend of 50 parts by weight of organic polymer,
Example 1 was repeated except that the materials shown in Table 3 were used. The results are also shown in Table 3. <Materials used> Pigment b: Chromium oxide, manufactured by Nippon Denko 〃 c: Lead chromate, manufactured by Kyushu Dainichiseika 〃 d: Phthalocyan blue, 〃 〃 e: Titanium oxide, 〃 Organic polymer β: Electric Product name "NK-1000" manufactured by Chemical Industry Co., Ltd.
Main component Acrylic γ: 〃 “54C” Main component Ethylene vinyl acetate δ: 〃 “84D” Main component 〃 Same as Example 1 except for the above.

Example 4 As shown in Table 4, 100% alumina cement 100 having different whiteness
The same procedure as in Example 1 was repeated except that 5.0 parts by weight of pigment a, 100 parts by weight of aggregate, and 50 parts by weight of organic polymer α were blended. The results are also shown in Table 4.

[0034]

EFFECTS OF THE INVENTION The use of the rapid-hardening colored waterproof material composition of the present invention improves rapid-hardness, workability, strength, and
Also, it is excellent in elasticity, is extremely resistant to warpage and cracks, and has a large adhesive force. Therefore, mainly in the field of civil engineering / construction materials, it can be used for floor materials, waterproof materials, adhesive materials, decorative finishing materials, repair materials, anti-food materials, pavement materials, waterproofing materials, and polymer cement products. Become.

[Table 2]

[Table 3]

[Table 4]

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Claims (2)

[Claims] 1. A quick-hardening colored waterproof material composition comprising alumina cement, a pigment, an aggregate, and an organic polymer. 2. The rapid-hardening colored waterproof material composition according to claim 1, wherein the whiteness of the alumina cement is 50 or more.