JP4853619B2 - Expandable admixture for resin finish floor and its use - Google Patents
Expandable admixture for resin finish floor and its use Download PDFInfo
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- JP4853619B2 JP4853619B2 JP2005344553A JP2005344553A JP4853619B2 JP 4853619 B2 JP4853619 B2 JP 4853619B2 JP 2005344553 A JP2005344553 A JP 2005344553A JP 2005344553 A JP2005344553 A JP 2005344553A JP 4853619 B2 JP4853619 B2 JP 4853619B2
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- 239000011347 resin Substances 0.000 title claims description 43
- 229920005989 resin Polymers 0.000 title claims description 43
- 239000004567 concrete Substances 0.000 claims description 74
- 239000000463 material Substances 0.000 claims description 50
- 239000002245 particle Substances 0.000 claims description 21
- 239000000126 substance Substances 0.000 claims description 19
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 14
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 14
- 239000004571 lime Substances 0.000 claims description 14
- 229910001653 ettringite Inorganic materials 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 description 21
- 238000012360 testing method Methods 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000003638 chemical reducing agent Substances 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 12
- 241000209094 Oryza Species 0.000 description 10
- 235000007164 Oryza sativa Nutrition 0.000 description 10
- 235000009566 rice Nutrition 0.000 description 10
- 235000013339 cereals Nutrition 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000008961 swelling Effects 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000004570 mortar (masonry) Substances 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000004088 foaming agent Substances 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
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- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 3
- 238000009408 flooring Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 229910021487 silica fume Inorganic materials 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000002734 clay mineral Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 230000002940 repellent Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VEUACKUBDLVUAC-UHFFFAOYSA-N [Na].[Ca] Chemical compound [Na].[Ca] VEUACKUBDLVUAC-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000000404 calcium aluminium silicate Substances 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- NPEWZDADCAZMNF-UHFFFAOYSA-N gold iron Chemical compound [Fe].[Au] NPEWZDADCAZMNF-UHFFFAOYSA-N 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は、樹脂仕上げ面を有する床用モルタルまたは床用コンクリート（以下、モルタルを含めてコンクリートと云う）に使用する膨張性混和材に関し、詳しくは、樹脂仕上げ面を施す床用コンクリートに混和した場合において、良好な仕上げ表面が得られる膨張性混和材に関する。また、本発明は上記膨張性混和材を用いた樹脂仕上げ面を有する床用コンクリートに関する。
The present invention relates to an expandable admixture used for floor mortar having a resin finish surface or floor concrete (hereinafter referred to as concrete including mortar), and more specifically, mixed with floor concrete to which a resin finish surface is applied. In some cases, it relates to an expandable admixture that provides a good finished surface. Moreover, this invention relates to the concrete for floors which has the resin finishing surface using the said expansible admixture.
従来から、コンクリートの収縮応力を緩和してひび割れの発生を抑制するために、コンクリートに膨張材等の膨張性混和材が使用されている。この膨張性混和材（膨張材）としては、カルシウムサルホアルミネートなどのエトリンガイト生成物質を主成分としたエトリンガイト系膨張性混和材（例えば特許文献１参照）、遊離石灰の水和膨張を利用した石灰系膨張性混和材（例えば特許文献２参照）、エトリンガイト生成物質および遊離石灰を主成分としたエトリンガイト・石灰複合系膨張性混和材（例えば特許文献３参照）などが知られている。これら膨張材は、一般的に土木分野における一般構造物コンクリート、水理構造物などの構築、あるいはヒューム管やボックスカルバート等のコンクリート２次製品の製造に主に使用され、建築分野にはあまり多く使用されてこなかった。
Conventionally, expansive admixtures such as expansive materials have been used for concrete in order to relieve shrinkage stress of concrete and suppress the occurrence of cracks. Examples of the expandable admixture (expandable material) include an ettringite-based expandable admixture mainly composed of an ettringite-producing substance such as calcium sulfoaluminate (see, for example, Patent Document 1), and lime utilizing the hydrated expansion of free lime. System expandable admixtures (see, for example, Patent Document 2), ettringite / lime composite expandable admixtures (see, for example, Patent Document 3) based on ettringite-forming substances and free lime are known. These expansion materials are generally used mainly in the construction of general structural concrete and hydraulic structures in the civil engineering field, or in the production of secondary concrete products such as fume pipes and box culverts. It has not been used.
しかし最近では、コンクリート用膨張材が、コンクリートのひび割れの発生を抑制することから、建築分野においても使用されることが増えてきている。一方、従来のコンクリート用膨張材は、コンクリートのひび割れの発生を抑制する効果はあるものの、コンクリート表面をエポキシ樹脂系塗り床材等で仕上げる樹脂仕上げ床に用いるコンクリートに混和して施工した場合に、樹脂仕上げ床の表面に米粒状の微細な膨れが多数発生し、床表面の美観を損ねると云う大きな問題を生じることがあることがわかった。このような膨れが起こるのはコンクリートの養生初期における養生温度が１０℃に満たない場合に起こり、初期養生温度が１０℃以上の場合は見られなかった。
本発明は、従来の上記問題を解決したものであり、樹脂仕上げ床を形成するコンクリートに使用した場合、コンクリートの養生初期の養生温度が１０℃より低くても樹脂仕上げ面の美観を損ねるような目立つ膨れがなく、従って、樹脂仕上げ面の美観を保つことができる膨張性混和材を提供することを目的とする。
The present invention solves the above-mentioned conventional problems, and when used for concrete forming a resin-finished floor, even if the curing temperature at the initial stage of curing of the concrete is lower than 10 ° C., the appearance of the resin-finished surface is impaired. It is an object of the present invention to provide an expandable admixture that has no noticeable swelling and therefore can maintain the appearance of the resin finish.
また本発明は、樹脂仕上げ面を施す床用コンクリートであって、膨張性混和材を含有しており、コンクリートの養生初期温度が１０℃に満たない場合でも、樹脂仕上げ面の美観を損ねる米粒状の膨れがなく、従って、樹脂仕上げ面の美観を保つことができるコンクリートを提供することを目的とする。 In addition, the present invention is a floor concrete for giving a resin finished surface, which contains an expansive admixture, and even if the initial curing temperature of the concrete is less than 10 ° C., the granular shape of rice impairs the appearance of the resin finished surface. An object of the present invention is to provide a concrete that does not swell and therefore can maintain the aesthetic appearance of the resin finish.
本発明によれば、以下に示す構成によって上記課題を解決した、樹脂仕上げ面用膨張性混和材とその用途が提供される。
（１）樹脂仕上げを施す床用コンクリートであって初期養生温度が１０℃より低いコンクリートに使用する膨張性混和材であって、膨張物質を主体とし、粒径１５０μｍを超える膨張物質の含有率が１質量％以下であることを特徴とする膨張性混和材。
（２）ブレーン比表面積が５７００cm2/ｇ以下であって、粒径１５０μｍを超える膨張物質の含有率が１質量％以下である石灰系膨張物質またはエトリンガイト・石灰複合系膨張物質を主体とする上記(1)に記載する膨張性混和材。
（３）膨張性混和材に含まれる膨張物質がブレーン比表面積４０００cm2/ｇ以下であって、粒径１５０μｍを超える膨張物質の含有率が０.５質量％以下、および粒径１２５μｍを超える膨張物質の含有率が１質量％以下である上記(1)または上記(2)に記載する膨張性混和材。
（４）樹脂仕上げ面を施す床用コンクリートであって、上記(1)〜上記(3)の何れかに記載する膨張性混和材を混合したことを特徴とする床用コンクリート。
ADVANTAGE OF THE INVENTION According to this invention, the expansible admixture for resin finishing surfaces which solved the said subject with the structure shown below, and its use are provided.
(1) A expandable admixture a floor concrete subjected to resin finishing initial curing temperature is used in the lower concrete than 10 ° C., the expansion material as a main component, the content of expandable material exceeding a particle size 150μm An expandable admixture characterized by being 1% by mass or less.
(2) The above-mentioned mainly composed of a lime-based expansion material or an ettringite / lime composite expansion material having a Blaine specific surface area of 5700 cm 2 / g or less and a content ratio of the expansion material exceeding 150 μm in particle size of 1% by mass or less. The expandable admixture described in (1).
(3) The expansion material contained in the expandable admixture has a Blaine specific surface area of 4000 cm 2 / g or less, the expansion material content exceeding 150 μm in particle size is 0.5 mass% or less, and the expansion exceeding 125 μm in particle size. The expandable admixture according to (1) or (2) above, wherein the content of the substance is 1% by mass or less.
(4) A floor concrete to which a resin-finished surface is applied, wherein the expansive admixture described in any one of (1) to (3) above is mixed.
本発明の膨張性混和材は、粒径の大きな膨張成分の含有量を制限しているので、本発明の膨張性混和材を配合した床用コンクリートによって樹脂仕上げ床を形成した場合、コンクリートの養生初期の養生温度が１０℃より低くても、樹脂仕上げ面の美観を損なうような膨張が実質的に発生しない。従って、樹脂仕上げ表面の美観に優れた樹脂仕上げ床を形成することができる。 Since the expansive admixture of the present invention limits the content of the expansive component having a large particle size, when the resin finish floor is formed with the concrete for flooring containing the expansive admixture of the present invention, the curing of the concrete is performed. Even if the initial curing temperature is lower than 10 ° C., expansion that impairs the aesthetic appearance of the resin finished surface does not substantially occur. Therefore, it is possible to form a resin-finished floor that is excellent in the appearance of the resin-finished surface.
また、本発明のコンクリートは、所定量の膨張性混和材を使用しているので適度に膨張し、ひび割れを生じることがなく、従って、樹脂仕上げ面の美観に優れた樹脂仕上げコンクリート床を形成することができる。さらに、本発明によって形成した樹脂仕上げ面を有するコンクリート床は、樹脂仕上げ面の美観に優れるので、建物の床面として好適であり、各種の建築物に広く適用することができる。 In addition, the concrete of the present invention uses a predetermined amount of expansive admixture, so that it expands moderately and does not crack, thus forming a resin-finished concrete floor with an excellent aesthetic appearance of the resin-finished surface. be able to. Furthermore, the concrete floor having a resin finish surface formed according to the present invention is excellent in the appearance of the resin finish surface, and thus is suitable as a floor surface of a building and can be widely applied to various buildings.
本発明の膨張性混和材は、樹脂仕上げを施す床用コンクリートであって初期養生温度が１０℃より低いコンクリートに使用する膨張性混和材であって、膨張物質を主体とし、粒径１５０μｍを超える膨張物質の含有率が１質量％以下であることを特徴とする膨張性混和材である。
また、本発明の膨張性混和材は、好ましくは、ブレーン比表面積が５７００cm2/ｇ以下であって、粒径１５０μｍを超える膨張物質の含有率が１質量％以下である石灰系膨張物質またはエトリンガイト・石灰複合系膨張物質を主体とする膨張性混和材であり、さらに好ましくは、ブレーン比表面積４０００cm2/ｇ以下であって、粒径１５０μｍを超える膨張物質の含有率が０.５質量％以下、および粒径１２５μｍを超える膨張物質の含有率が１質量％以下の膨張性混和材である。
The expansive admixture of the present invention is an expansive admixture that is used for concrete with a resin finish and has an initial curing temperature lower than 10 ° C. , mainly composed of an expansive substance and having a particle size of more than 150 μm. The expandable admixture is characterized in that the content of the expandable material is 1% by mass or less.
The expansive admixture of the present invention is preferably a lime-based expansive substance or ettringite having a Blaine specific surface area of 5700 cm 2 / g or less and a content of expansive substance having a particle size of 150 μm or less of 1% by mass or less. -An expandable admixture mainly composed of a lime composite-based expansion material , more preferably a Blaine specific surface area of 4000 cm 2 / g or less, and a content of the expansion material exceeding a particle size of 150 μm is 0.5% by mass or less And an expandable admixture in which the content of the expandable substance having a particle size exceeding 125 μm is 1% by mass or less.
本発明の膨張性混和材は、粒径１５０μｍを超える膨張物質の含有率を１質量％以下に制限することによって、この混和材を配合した床用コンクリートによって樹脂仕上げ面を有するコンクリート床を形成した場合、樹脂仕上げ面の美観を損ねる大きさの米粒状の膨れの発生を抑制したものである。なお、本発明において、樹脂仕上げ面の美観を損ねる大きさの米粒状の膨れが発生するとは、樹脂仕上げ面の１辺３０ｃｍの正方形内（該床表面９００ｃｍ2当り）に、３０個を超える直径２〜５ｍｍ程度の米粒状の微細な膨れが発生することを云う。
In the expandable admixture of the present invention, a concrete floor having a resin finish surface is formed by floor concrete mixed with the admixture by limiting the content of the expandable material having a particle size exceeding 150 μm to 1% by mass or less. In this case, it is possible to suppress the occurrence of blistering of rice grains having a size that impairs the appearance of the resin finished surface. In the present invention, the occurrence of a rice-grained bulge with a size that impairs the appearance of the resin finished surface occurs when the diameter exceeds 30 in a 30 cm side square (per 900 cm 2 of the floor surface) of the resin finished surface. This means that a fine swell of rice grains of about 2 to 5 mm occurs.
膨張性混和材に含まれる粒径１５０μｍを超える膨張物質の含有率が１質量％を超えると、この混和材を配合した床用コンクリート表面に樹脂仕上げ面を形成する場合、コンクリートの養生初期温度が１０℃より低いと、コンクリート表面に直径５ｍｍ前後の米粒状の膨れが多数発生し、この膨れはコンクリート表面に樹脂仕上げを施しても目立つので、樹脂仕上げ面の美観を大幅に損なうことになる。
When the content of the expansive substance contained in the expansive admixture exceeds 1% by mass, the resin curing surface is formed on the floor concrete surface blended with the admixture. When the temperature is lower than 10 ° C., many bulges of rice grains having a diameter of about 5 mm are generated on the concrete surface, and these bulges are conspicuous even when the resin surface is applied to the concrete surface, so that the appearance of the resin finished surface is greatly impaired.
本発明の膨張性混和材は、床用コンクリート表面を樹脂仕上げしたときに、目立たない程度の膨張に抑えることができる膨張物質の粒径と含有量とを検討し、膨張性混和材に含まれる膨張物質について、粒径１５０μｍを超える膨張物質の含有率を１質量％以下に制限したものである。
The expansive admixture of the present invention is included in the expansive admixture by examining the particle size and content of an expansive substance that can be suppressed to an inconspicuous degree of expansion when the concrete surface for flooring is finished with resin. About the expansion | swelling substance, the content rate of the expansion | swelling substance exceeding a particle size of 150 micrometers is restrict | limited to 1 mass% or less.
本発明の膨張性混和材において、粒径１５０μｍを超える膨張物質の含有率は、好ましくは０.５質量％以下が適当である。この含有率が０.５質量％以下であると、上記米粒状の膨れの発生量がより一層少なくなる。また、より好ましくは、粒径１２５μｍを超える膨張物質の含有率が１質量％以下であるのが良い。膨張性混和材に含まれる粒径１２５μｍを超える膨張物質の含有率が１質量％以下であると、樹脂仕上げ面の美観を損なう大きさの米粒状の膨れは殆ど発生しない。
In the expandable admixture of the present invention, the content of the expandable material having a particle size exceeding 150 μm is preferably 0.5% by mass or less. When this content is 0.5% by mass or less, the amount of the above-mentioned rice grain swelling is further reduced. More preferably, the content of the expanding material having a particle size of more than 125 μm is 1% by mass or less. When the content of the expansion material having a particle size of more than 125 μm contained in the expandable admixture is 1% by mass or less, there is almost no expansion of rice grains having a size that impairs the appearance of the resin finish.
本発明の膨張性混和材に含まれる膨張物質について、上記粒径を超える膨張物質の含有率は、日本工業規格（JIS A 1102「骨材のふるい分け試験方法」）に準じて、当該粒径と同じ公称目開きの篩に留まる膨張物質の質量から求めたものである。
For the expansive substance contained in the expansive admixture of the present invention, the content of the expansive substance exceeding the above particle diameter is determined according to the Japanese Industrial Standard (JIS A 1102 “Aggregate Screening Test Method”). It is obtained from the mass of the expansion material remaining on the same nominal aperture sieve.
さらに、本発明の膨張性混和材に含まれる膨張物質の粉末度は、ブレーン比表面積が５７００cm2/ｇ以下であるものが好ましく、４０００cm2/ｇ以下がより好ましい。膨張物質の粉末度が上記範囲内であると、充分な膨張効果が得られるので、コンクリートのひび割れの発生を充分抑制することができる。
Furthermore, the fineness of the expansion material contained in expansive admixture of the present invention is preferably one Blaine specific surface area is less than 5700cm 2 / g, 4000cm 2 / g or less is more preferable. If the degree of fineness of the expansion material is within the above range, a sufficient expansion effect can be obtained, so that the occurrence of cracks in the concrete can be sufficiently suppressed.
一方、膨張物質の粉末度がブレーン比表面積５７００cm2/ｇより大きいと、この膨張性混和材の膨張力が不足するために、単位混和材量が多く必要になる。従って、この膨張性混和材を混和したコンクリートは、経済性に劣り、しかもコンクリートの流動性が早期に低下するため作業性が早期に悪くなる。
On the other hand, if the fineness of the expandable material is greater than the Blaine specific surface area of 5700 cm 2 / g, the expandability of the expandable admixture is insufficient, so a large amount of unit admixture is required. Therefore, the concrete mixed with this expansive admixture is inferior in economic efficiency, and the fluidity of the concrete is lowered early, so that the workability is deteriorated early.
なお、本発明の膨張性混和材は、日本工業規格（JIS A 6202「コンクリート用膨張材」）に適合するものであれば、コンクリート用膨張材として広く用いることができるので好ましい。
The expansive admixture of the present invention is preferably any material that conforms to the Japanese Industrial Standard (JIS A 6202 “ Expanding material for concrete”) because it can be widely used as an expanding material for concrete.
また、一般に、コンクリートに対する膨張性混和材の単位配合量は概ね１０〜１００kg/ｍ3程度であるが、本発明の膨張性混和材は、樹脂仕上げを施す床用コンクリートに上記単位配合量を使用した場合、樹脂仕上げ面の美観を損なう膨れは発生せず、優れた美観を有する樹脂仕上げ面を得ることができるので好ましい。 In general, the unit blending amount of the expansive admixture with respect to concrete is approximately 10 to 100 kg / m 3 , but the expansive admixture of the present invention uses the above unit blending amount for the floor concrete to be subjected to resin finishing. In this case, the blistering that impairs the appearance of the finished resin surface does not occur, and a finished resin surface having an excellent appearance can be obtained, which is preferable.
本発明の膨張性混和材に含まれる膨張物質は、水和反応またはセメント中の物質との反応によって生成する水酸化カルシウムやエトリンガイト等の結晶が成長して、混和したモルタルやコンクリート等を膨張させる性能を有する物質であり、例えば、アウィン（３ＣａＯ・３Ａｌ2Ｏ3・ＣａＳＯ4）等のカルシウムサルホアルミネート、生石灰、遊離石灰を含有する焼成物、カルシウムアルミノフェライト、カルシウムアルミノシリケート等が例示され、これらの一種または二種以上を用いることができる。これらのうち、生石灰や遊離石灰を含有する焼成物等の遊離石灰を含有する膨張物質が、少量で安定した高い膨張力を得やすいので好ましい。
Expansion material contained in expansive admixture of the present invention, crystals of ettringite and calcium hydroxide and generated by the reaction with a substance of hydration or cement grows, inflating the mixed mortar or concrete, etc. It is a substance having performance, for example, calcium sulfoaluminate such as Awin (3CaO · 3Al 2 O 3 · CaSO 4 ), quick lime, calcined product containing free lime, calcium alumino ferrite, calcium aluminosilicate, etc. One or two or more of these can be used. Among these, an expanded substance containing free lime such as a calcined product containing quick lime or free lime is preferable because a stable and high expansion force can be easily obtained in a small amount.
本発明の膨張性混和材には、膨張物質以外に、本発明の効果を損なわない範囲で、モルタルやコンクリートに一般に使用されている混和材料やセメントを添加することができる。この混和材料やセメントとしては、例えば、高性能減水剤、高性能ＡＥ減水剤、ＡＥ減水剤、流動化剤を含む減水剤、防水材(剤)、急結剤(材)、急硬剤(材)、顔料、撥水剤、発泡剤、起泡剤、消泡剤、遅延剤、硬化促進剤、収縮低減剤、増粘剤、水和熱抑制剤、水和熱抑制剤、保水剤、防錆剤、セメント用ポリマー、石粉、粘土鉱物粉末、スラグ粉末、フライアッシュ、繊維、シリカフューム、普通ポルトランドセメントやエコセメント等のセメント、フィラー等が挙げられ、これらの一種または二種以上を本発明による効果を阻害しない範囲で使用することができる。
To the expandable admixture of the present invention, in addition to the expandable material, an admixture or cement generally used for mortar or concrete can be added within a range not impairing the effects of the present invention. Examples of this admixture and cement include high-performance water reducing agents, high-performance AE water reducing agents, AE water reducing agents, water reducing agents including fluidizing agents, waterproofing materials (agents), quick setting agents (materials), and hardeners ( Material), pigment, water repellent, foaming agent, foaming agent, antifoaming agent, retarder, curing accelerator, shrinkage reducing agent, thickener, hydration heat inhibitor, hydration heat inhibitor, water retention agent, Rust preventive agent, cement polymer, stone powder, clay mineral powder, slag powder, fly ash, fiber, silica fume, ordinary portland cement and eco-cement cement, filler, etc. It can be used within a range that does not impede the effect of.
本発明の膨張性混和材を製造する方法は限定されない。例えば、市販の膨張材を本発明の膨張性混和材となるように、篩や分級機で分級することによって製造する方法、市販の膨張材を本発明の膨張性混和材となるように粉砕機で粉砕することによって製造する方法、少なくとも上記膨張物質を含む原材料を本発明の膨張性混和材となるように粉砕機で粉砕することによって製造する方法、上記膨張物質を本発明の膨張性混和材となるように粉砕機で粉砕した粉砕物に上記混和材料やセメント等を添加して製造する方法、これらを組み合わせた製造方法等によって製造することができる。
The method for producing the expandable admixture of the present invention is not limited. For example, a method for producing a commercially available expandable material by classification with a sieve or a classifier so that it becomes the expandable admixture of the present invention, a pulverizer so that the commercially available expandable material becomes the expandable admixture of the present invention in a method for producing by milling, a method for producing by milling raw materials containing at least the inflation material with expandable admixture become so crusher of the present invention, expandable admixture of the present invention the inflation material Thus, it can be produced by a method of adding the above-mentioned admixture or cement to the pulverized product pulverized by a pulverizer, a manufacturing method combining these, or the like.
本発明の膨張性混和材は、樹脂仕上げを施す床用コンクリートに混和して用いる。本発明の膨張性混和材を床用コンクリートに混和する時期や方法は限定されない。なお、混和後または混和中にミキサにより他の材料と混合することが好ましい。
The expandable admixture of the present invention is used by being mixed with floor concrete to be subjected to resin finishing. The timing and method for mixing the expandable admixture of the present invention into the floor concrete are not limited. In addition, it is preferable to mix with another material with a mixer after mixing or during mixing.
本発明の床用コンクリートに使用するセメントは、水和反応により硬化する水硬性セメントであれば何れのものでも良く、例えば、(1)普通、早強、超早強、低熱、中庸熱、白色等の各種ポルトランドセメント、エコセメント、(2)各種ポルトランドセメントまたはエコセメントにフライアッシュ、高炉スラグ，シリカヒューム等を混合した各種混合セメント、カラーセメント、アルミナセメント、(3)カルシウムアルミネート、カルシウムナトリウムアルミネート、カルシウムサルホアルミネート等の急硬成分を主体とする急硬性セメント、超速硬セメント、(4)無水石膏、半水石膏等を用いることができ、これらを単独で使用し、または二種以上を併用することができる。 The cement used for the floor concrete of the present invention may be any hydraulic cement that hardens by a hydration reaction. For example, (1) normal, early strength, very early strength, low heat, moderate heat, white Portland cement, eco cement, etc. (2) Various portland cement or eco cement mixed with fly ash, blast furnace slag, silica fume, etc., mixed cement, color cement, alumina cement, (3) calcium aluminate, calcium sodium Quick hardening cements mainly composed of quick hardening components such as aluminate and calcium sulfoaluminate, super fast hardening cement, (4) anhydrous gypsum, hemihydrate gypsum, etc. can be used, these are used alone, or two kinds The above can be used together.
本発明の床用コンクリートに使用する骨材は制限されず、例えば、川砂、陸砂、海砂、砕砂、珪砂、川砂利、陸砂利、砕石及び人工骨材等の一般に使用されるものを用いることができる。これらは一種または二種以上を併用することができる。 The aggregate used for the floor concrete of the present invention is not limited, and for example, generally used materials such as river sand, land sand, sea sand, crushed sand, quartz sand, river gravel, land gravel, crushed stone and artificial aggregate are used. be able to. These can be used alone or in combination of two or more.
本発明の樹脂仕上げを施す床用コンクリートには、本発明の膨張性混和材、および骨材、水以外に、本発明の効果を損なわない範囲で、通常のモルタルやコンクリートに使用できる混和材料を添加することができる。この混和材料としては、例えば、高性能減水剤、高性能ＡＥ減水剤、ＡＥ減水剤、流動化剤を含む減水剤、防水材(剤)、急結剤(材)、急硬剤(材)、顔料、撥水剤、発泡剤、起泡剤、消泡剤、遅延剤、硬化促進剤、収縮低減剤、増粘剤、水和熱抑制剤、保水剤、防錆剤、水中不分離性混和剤、セメント用ポリマー、石粉、粘土鉱物粉末、スラグ粉末、フライアッシュ、繊維、シリカフューム、フィラー等が挙げられ、これらの一種または二種以上を本発明による効果を阻害しない範囲で使用することができる。なお、本発明の膨張性混和材などを配合した床用コンクリートの製造方法および使用方法は限定されない。
In addition to the expandable admixture of the present invention, the aggregate, and water, the floor concrete subjected to the resin finish of the present invention includes an admixture that can be used for ordinary mortar and concrete as long as the effects of the present invention are not impaired. Can be added. As this admixture, for example, high-performance water reducing agent, high-performance AE water-reducing agent, AE water-reducing agent, water-reducing agent containing fluidizing agent, waterproofing material (agent), quick setting agent (material), rapid hardening agent (material) , Pigment, Water repellent, Foaming agent, Foaming agent, Antifoaming agent, Delay agent, Curing accelerator, Shrinkage reducing agent, Thickener, Hydration heat inhibitor, Water retention agent, Rust preventive agent, Underwater separability Admixture, polymer for cement, stone powder, clay mineral powder, slag powder, fly ash, fiber, silica fume, filler, etc. may be mentioned, and one or two or more of these may be used within a range that does not impair the effect of the present invention. it can. In addition, the manufacturing method and usage method of the floor concrete which mix | blended the expansible admixture of this invention, etc. are not limited.
本発明の膨張性混和材を配合した床用コンクリートによって、床表面に施した樹脂仕上げ面の美観を損なわないコンクリート床を形成することができる。 A concrete floor that does not impair the aesthetics of the resin-finished surface applied to the floor surface can be formed by the floor concrete containing the expandable admixture of the present invention.
床用コンクリート表面に施す樹脂仕上げに用いる樹脂の種類は限定されない。例えばエポキシ樹脂やウレタン樹脂等が用いられる。また、床用コンクリート表面に施す樹脂仕上げの方法も限定されない。例えば、床用コンクリート表面にエポキシ樹脂系塗料を塗布する方法、床用コンクリート表面に樹脂製長尺シートを貼り付ける方法、硬化前または硬化した樹脂層の上にコンクリートを打ち込みコンクリートが硬化後に上下反転させ樹脂層からなる表面を有するようにした方法等が挙げられる。 The type of resin used for resin finishing applied to the floor concrete surface is not limited. For example, an epoxy resin or a urethane resin is used. Further, the resin finishing method applied to the floor concrete surface is not limited. For example, a method of applying an epoxy resin paint on the floor concrete surface, a method of sticking a long resin sheet on the floor concrete surface, and placing concrete on a cured resin layer before curing or flipping the concrete upside down after curing And a method of having a surface composed of a resin layer.
以下、本発明の実施例を比較例と共に示す。
〔膨張性混和材の調整〕
日本工業規格（JIS Z 8801-1「試験用ふるい−第１部：金属製網篩」）に規定する試験用網篩を用い、市販の石灰系膨張材またはエトリンガイト・石灰複合系膨張材を、表１に示す粒度分布に調整して膨張性混和材（本発明品Ａ〜Ｆ、参考品Ｇ〜Ｊ）を調製した。なお、表１において、「１５０μｍ残分」「１２５μｍ残分」「１００μｍ残分」とは、日本工業規格（JIS A 1102「骨材のふるい分け試験方法」）に準じ、公称目開き１５０μｍの試験用篩、公称目開き１２５μｍの試験用篩、公称目開き１００μｍの試験用篩を篩目の大きい順に三段重ね、これに上側から膨張性混和材を投入して篩分けし、各篩に残った膨張性混和材の質量を測定し、この質量から求めた各篩に残った膨張性混和材の含有率である。
Examples of the present invention are shown below together with comparative examples.
(Adjustment of expandable admixture)
Using a test mesh sieve specified in Japanese Industrial Standards (JIS Z 8801-1 “Test sieve—Part 1: Metal mesh sieve”), a commercially available lime-based expansion material or ettringite / lime-composite expansion material is used. Adjustable to the particle size distribution shown in Table 1, expandable admixtures (invention products A to F, reference products G to J) were prepared. In Table 1, “150 μm residue”, “125 μm residue”, and “100 μm residue” are for tests with a nominal aperture of 150 μm in accordance with Japanese Industrial Standard (JIS A 1102 “Aggregate screening test method”). A sieve, a test sieve having a nominal aperture of 125 μm, and a test sieve having a nominal aperture of 100 μm are stacked in three stages in order of size of the sieve, and an expandable admixture is added to the sieve from the upper side, and remains on each sieve. The mass of the expandable admixture was measured, and the content of the expandable admixture remaining on each sieve was determined from this mass.
表１に示す各膨張性混和材とセメントの合計１００質量部に対し、膨張性混和材を６質量部、水を５５質量部使用し、膨張性混和材とセメントの単位量の合計が３１８kg/m3、Ｓ／ａ＝４８％、セメント１００質量部に対して減水剤を１質量部添加して、コンクリートミキサにより各樹脂仕上げ床用コンクリートを製造した。使用材料は以下に示すものを用いた。
6 parts by weight of the expandable admixture and 55 parts by weight of water are used for 100 parts by weight of each expandable admixture and cement shown in Table 1, and the total unit amount of the expandable admixture and cement is 318 kg / m 3 , S / a = 48%, 1 part by mass of a water reducing agent was added to 100 parts by mass of cement, and concrete for each resin finished floor was produced using a concrete mixer. The following materials were used.
〔使用材料〕
セメント：普通ポルトランドセメント（太平洋セメント社製品）
粗骨材：栃木県産砕石（表乾密度２.６５ｇ/cm3）
細骨材：静岡県産陸砂（表乾密度２.６０ｇ/cm3）
減水剤：リグニンスルホン酸系減水剤
水：水道水
[Materials used]
Cement: Ordinary Portland cement (product of Taiheiyo Cement)
Coarse aggregate: Crushed stone from Tochigi prefecture (surface dry density 2.65 g / cm 3 )
Fine aggregate: Land sand from Shizuoka prefecture (surface dry density 2.60 g / cm 3 )
Water reducing agent: Lignin sulfonic acid water reducing agent water: Tap water
作製した各コンクリートについて、以下に示す膨張性試験および膨れ発生確認試験を行った。その結果を表２に示す。
〔膨張性試験〕
日本工業規格（JIS A 6202「コンクリート用膨張材」附属書２（参考）「膨張コンクリートの拘束膨張及び収縮試験方法」Ｂ法）に従って、材齢７日の拘束膨張率を測定した。
About each produced concrete, the expansibility test shown below and the blister generation | occurrence | production confirmation test were done. The results are shown in Table 2.
[Expansion test]
In accordance with Japanese Industrial Standards (JIS A 6202 “ Expanding Material for Concrete”, Annex 2 (Reference) “Method for Restraining Expansion and Shrinkage of Expanded Concrete” Method B), the restricted expansion rate at 7 days of age was measured.
〔膨れ発生確認試験〕
（１）試験方法
環境条件５℃条件下で、予めエポキシ樹脂接着材を塗布した木製型枠(30×30×8cm)に作製した表１のコンクリートを打ち込み、コンクリート表面を金コテで仕上げた。コンクリートの打ち込み翌日に、コンクリート表面を水で濡れたウエスで覆うことによって湿潤養生を行った。湿潤養生１日経過後、濡れたウエスを取り去り、以降５℃環境下で気中養生を行った。２〜３週間を目処にケット科学研究所社の表面含水率測定器(HI-520)を用いてコンクリートの表面含水率が１０％以下になったことを確認して、サンドペーパーで下地処理を行い、エポキシ樹脂系塗り床仕上げ材（エービーシー商会社製品）を厚み０.５mmとなるように塗布し、膨れ発生確認試験の試験体を作製した。塗り床仕上げ材塗布２週間後に試験体を５℃環境下から２０℃環境下へ移動し、試験体の樹脂層表面（塗り床仕上げ材表面）の膨れ現象を観察した。
（２）評価
試験体の樹脂層表面（塗り床仕上げ材表面）に直径２〜５mm程度の米粒状の微細な膨れが、９００cm2当り３０個を超え発生した場合を「膨れ有り」、９００cm2当り１０個以上３０個未満で発生した場合を「膨れ少」、９００cm2当り１０個未満の場合を「膨れ略無し」と評価した。
[Swelling confirmation test]
(1) Test Method Under the environmental condition of 5 ° C., the concrete shown in Table 1 prepared in a wooden formwork (30 × 30 × 8 cm) previously coated with an epoxy resin adhesive was poured, and the concrete surface was finished with a gold iron. On the day after the concrete was placed, wet curing was performed by covering the concrete surface with a wet cloth with water. After 1 day of wet curing, the wet waste was removed, and thereafter air curing was performed in an environment of 5 ° C. After 2 to 3 weeks, use the surface moisture content measuring device (HI-520) of Kett Science Laboratory to confirm that the surface moisture content of the concrete is 10% or less, and then treat the surface with sandpaper. Then, an epoxy resin-based coated floor finish (ABC trading company product) was applied to a thickness of 0.5 mm to prepare a test body for a blister generation confirmation test. Two weeks after the application of the coating floor finish, the test specimen was moved from a 5 ° C. environment to a 20 ° C. environment, and the swelling phenomenon of the resin layer surface (coated floor finishing material surface) of the test specimen was observed.
(2) Evaluation resin layer surface (coating floor covering surface) of the test body to blistering of the rice grain having a diameter of about 2~5mm fine is, "Yes blister" and if they occur more than 30 pieces 2 per 900 cm, 900 cm 2 A case where the number of occurrences was 10 or more and less than 30 per case was evaluated as “low swelling”, and a case where the number was less than 10 per 900 cm 2 was evaluated as “substantially no swelling”.
本発明品の膨張性混和材を用いたコンクリート（実施例１〜実施例６）の表面に樹脂仕上げ層を有する試験体は、何れも試験体の樹脂層表面（塗り床仕上げ材表面）に直径２〜５ｍｍ程度の米粒状の微細な膨れが発生せず、美観に優れていた。また、本発明品の膨張性混和材を用いたコンクリートは、何れも良好な膨張性試験結果であった。また、本発明品以外の膨張性混和材（参考品Ｇ〜Ｊ）を用いたコンクリート（比較例１〜比較例４）は何れも良好な膨張性試験結果であったが、比較例１〜比較例４の試験体は何れも試験体の樹脂層表面（塗り床仕上げ材表面）に直径２〜５ｍｍ程度の米粒状の微細な膨れが９００cm2当り３０個を超え発生し、美観が劣っていた。
The specimens having a resin finish layer on the surface of concrete (Examples 1 to 6) using the intumescent admixture of the present invention have a diameter on the resin layer surface (coated floor finish surface) of the specimen. There was no fine bulge of rice grains of about 2 to 5 mm, and the aesthetic appearance was excellent. Moreover, the concrete using the expansive admixture of the product of the present invention was a good expansibility test result. Further, concrete using expansive admixture other than the present invention product (Reference product G-J) (Comparative Example 1 to Comparative Example 4) was good expansion test results none Comparative Example 1 to Comparative The specimens of Example 4 were inferior in aesthetic appearance because more than 30 fine grains of rice grains having a diameter of about 2 to 5 mm per 900 cm 2 occurred on the surface of the resin layer (surface of the coated floor finish) of the specimen. .
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