JP5744498B2 - Cement rapid hardwood manufacturing method - Google Patents
Cement rapid hardwood manufacturing method Download PDFInfo
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- JP5744498B2 JP5744498B2 JP2010274942A JP2010274942A JP5744498B2 JP 5744498 B2 JP5744498 B2 JP 5744498B2 JP 2010274942 A JP2010274942 A JP 2010274942A JP 2010274942 A JP2010274942 A JP 2010274942A JP 5744498 B2 JP5744498 B2 JP 5744498B2
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- gypsum
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- calcium aluminate
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- 239000004568 cement Substances 0.000 title claims description 48
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000011121 hardwood Substances 0.000 title description 5
- 239000010440 gypsum Substances 0.000 claims description 60
- 229910052602 gypsum Inorganic materials 0.000 claims description 60
- 239000000463 material Substances 0.000 claims description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 33
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 18
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 17
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 17
- 239000004571 lime Substances 0.000 claims description 17
- 150000004683 dihydrates Chemical class 0.000 claims description 14
- 238000000227 grinding Methods 0.000 claims description 7
- 239000004848 polyfunctional curative Substances 0.000 claims description 3
- 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 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 36
- 239000000292 calcium oxide Substances 0.000 description 18
- 235000012255 calcium oxide Nutrition 0.000 description 18
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 239000000047 product Substances 0.000 description 11
- 239000013065 commercial product Substances 0.000 description 10
- 210000004556 brain Anatomy 0.000 description 7
- 239000004567 concrete Substances 0.000 description 7
- 238000010298 pulverizing process Methods 0.000 description 7
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 244000007645 Citrus mitis Species 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 229910004261 CaF 2 Inorganic materials 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- ULGYAEQHFNJYML-UHFFFAOYSA-N [AlH3].[Ca] Chemical compound [AlH3].[Ca] ULGYAEQHFNJYML-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- 229910052936 alkali metal sulfate Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000007798 antifreeze agent Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- -1 calcium sulfate anhydride Chemical class 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000006072 paste Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は、土木・建築分野において使用されるコンクリート用のセメント急硬材の製造方法及びセメント急硬材に関する。 The present invention relates to a method for producing a cement hardened material for concrete used in the field of civil engineering and architecture, and a cement hardened material.
カルシウムアルミネートとセッコウの混合物をセメントに混和することによって、早期の強度発現性が得られることが知られている（特許文献１参照）。
また、カルシウムアルミネートとセッコウの混合物からなるセメント急硬材の使用にあたっては可使時間を確保するため、カルシウムアルミネートとセッコウからなる混合物に水を含有させる方法（特許文献２参照）、カルシウムアルミネートを硫酸の存在下で少量の水と混合する方法（特許文献３参照）、水和物で被覆されたカルシウムアルミネートと硫酸カルシウムに対して、アルミニウム硫酸塩、アルカリ金属硫酸塩、アルカリ金属炭酸塩を配合する方法（特許文献４参照）、二水セッコウで表面が被覆されてなる無水セッコウとカルシウムアルミネートを配合する方法（特許文献５参照）が知られている。
さらに、無水セッコウと二水セッコウの混合物に急硬成分やセメントを混合してなる注入材が知られている（特許文献６参照）。
It is known that early strength development can be obtained by mixing a mixture of calcium aluminate and gypsum into cement (see Patent Document 1).
In addition, in order to secure a pot life in using a cement hardened material composed of a mixture of calcium aluminate and gypsum, a method of containing water in the mixture composed of calcium aluminate and gypsum (see Patent Document 2), calcium aluminum A method of mixing an nate with a small amount of water in the presence of sulfuric acid (see Patent Document 3), calcium aluminate and calcium sulfate coated with hydrate, aluminum sulfate, alkali metal sulfate, alkali metal carbonate A method of blending salt (see Patent Document 4) and a method of blending anhydrous gypsum whose surface is coated with dihydrate gypsum and calcium aluminate (see Patent Document 5) are known.
Furthermore, an injection material obtained by mixing a rapid hardening component or cement with a mixture of anhydrous gypsum and dihydrate gypsum is known (see Patent Document 6).
本発明は、可使時間を確保できるコンクリート用のセメント急硬材の製造方法及びセメント急硬材を提供する。 The present invention provides a method for producing a cement rapid hardening material for concrete and a cement rapid hardening material capable of ensuring a pot life.
本発明は、（１）カルシウムアルミネートに、半水セッコウ及び二水セッコウから選ばれる１種又は２種を配合して同時粉砕する際に、さらに石灰系材料を配合し粉砕し、同時粉砕後に無水セッコウをカルシウムアルミネート５０．００質量部に対して無水セッコウ４６．５０〜４９．５０質量部となるように混合してなるセメント急硬材の製造方法、（２）半水セッコウ及び二水セッコウから選ばれる１種又は２種が、カルシウムアルミネートと無水セッコウの合計９７．００〜９９．９５質量部に対して、０．０５〜３．００質量部である（１）のセメント急硬材の製造方法、（３）石灰系材料が、カルシウムアルミネート、無水セッコウ、半水セッコウ及び二水セッコウから選ばれる１種または２種の合計９７．００〜９９．９５質量部に対して０．０５〜３．００質量部である（１）又は（２）のセメント急硬材の製造方法、（４）カルシウムアルミネートが非晶質である（１）〜（３）のいずれかのセメント急硬材の製造方法、（５）ブレーン比表面積が３０００〜９０００ｃｍ２／ｇである（１）〜（４）のいずれかのセメント急硬材の製造方法、である。 The present invention relates to (1) calcium aluminate Natick bets, when the co-pulverized by blending one or two elements selected from the hemihydrate gypsum and gypsum, and further contain a lime-based material grinding, co-grinding A method for producing a cement hardener obtained by mixing anhydrous gypsum so as to be 46.50 to 49.50 parts by mass of anhydrous gypsum with respect to 50.00 parts by mass of calcium aluminate , and (2 ) half water gypsum and two one or two elements selected from water gypsum, the total from 97.00 to 99.95 parts by weight of calcium aluminate and anhydrous gypsum, cement steep is 0.05 to 3.00 parts by weight (1) ( 3 ) The lime-based material is a total of 97.00 to 99.95 of one or two types selected from calcium aluminate, anhydrous gypsum, semi-water gypsum and dihydrate gypsum. Process for producing a cement rapid hardwood is 0.05 to 3.00 parts by weight with respect to the amount unit (1) or (2), is amorphous (4) calcium aluminate (1) - (3 either way the production of cement rapid hardwood), (5) Blaine specific surface area of 3000~9000cm 2 / g (1) ~ (4) any of the method for producing a cement rapid hardwood is.
本発明のセメント急硬材の製造方法により、充分な可使時間を確保できるセメント急硬材及びそれを用いた急硬コンクリートを提供することが可能となる。 According to the method for producing a cement hardened material of the present invention, it is possible to provide a cement hardened material capable of securing a sufficient pot life and a rapidly hardened concrete using the cement hardened material.
なお、本発明で使用する部、％は、特に指定しない限り質量基準である。
また、本発明でいうコンクリートとは、セメントペースト、セメントモルタル、セメントコンクリートを総称するものである。
The parts and% used in the present invention are based on mass unless otherwise specified.
The concrete as used in the present invention is a generic term for cement paste, cement mortar, and cement concrete.
本発明でいうカルシウムアルミネートとは、ＣａＯとＡｌ２Ｏ３を主成分とする化合物を総称するものであり、その具体例としては、例えば、ＣａＯ成分とＡｌ２Ｏ３成分を主成分とする非晶質の化合物や、ＣａＯ・２Ａｌ２Ｏ３、ＣａＯ・Ａｌ２Ｏ３、１２ＣａＯ・７Ａｌ２Ｏ３、３ＣａＯ・Ａｌ２Ｏ３、１１ＣａＯ・７Ａｌ２Ｏ３・ＣａＦ２、及び３ＣａＯ・３Ａｌ２Ｏ３・ＣａＦ２などと表わされる結晶性のカルシウムアルミネートが挙げられる。このうち、非晶質のカルシウムアルミネートが好ましい。 The calcium aluminate as used in the present invention is a generic term for compounds mainly composed of CaO and Al 2 O 3 , and specific examples thereof include, for example, a CaO component and an Al 2 O 3 component as main components. and amorphous compounds, CaO · 2Al 2 O 3, CaO · Al 2 O 3, 12CaO · 7Al 2 O 3, 3CaO · Al 2 O 3, 11CaO · 7Al 2 O 3 · CaF 2, and 3CaO · 3Al 2 Examples thereof include crystalline calcium aluminate represented as O 3 · CaF 2 . Of these, amorphous calcium aluminate is preferred.
本発明で使用する無水セッコウとは、硫酸カルシウム無水物でＣａＳＯ４なる分子式で示される化合物の総称である。
また、本発明で使用する半水セッコウ、二水セッコウとは、それぞれＣａＳＯ４・１／２Ｈ２Ｏ、ＣａＳＯ４・２Ｈ２Ｏなる分子式で示される化合物の総称である。
The anhydrous gypsum used in the present invention is a general term for compounds represented by the molecular formula CaSO 4 , which is calcium sulfate anhydride.
Moreover, the semi-water gypsum and the two-water gypsum used in the present invention are generic names of compounds represented by molecular formulas of CaSO 4 · 1 / 2H 2 O and CaSO 4 · 2H 2 O, respectively.
本発明のセメント急硬材は、カルシウムアルミネート又はカルシウムアルミネートと無水セッコウの混合物に対して、半水セッコウ及び二水セッコウから選ばれる１種又は２種を配合後、同時粉砕するものである。
カルシウムアルミネート、あるいはカルシウムアルミネートと無水セッコウの混合物と、半水セッコウ及び二水セッコウから選ばれる１種又は２種の配合割合は一義的に決められるものではないが、通常、カルシウムアルミネートと無水セッコウの合計９７．００〜９９．９５部に対して、半水セッコウ及び二水セッコウから選ばれる１種又は２種を０．０５〜３．００部を配合することが好ましい。また、カルシウムアルミネートと無水セッコウの合計９７．５０〜９９．９０部に対して、半水セッコウ及び二水セッコウから選ばれる１種又は２種を０．１０〜２．５０部を配合することがより好ましく、カルシウムアルミネートと無水セッコウの合計９８．００〜９９．８０部に対して、半水セッコウ及び二水セッコウから選ばれる１種又は２種を０．２０〜２．００部を配合することがさらに好ましい。半水セッコウ及び二水セッコウから選ばれる１種又は２種の配合量が０．０５部未満だと、可使時間の確保が難しくなる場合があり、３．００部を超えて配合すると強度発現性が不良となる場合がある。
The cement rapid hardening material of the present invention is a mixture of calcium aluminate or a mixture of calcium aluminate and anhydrous gypsum mixed with one or two kinds selected from semi-water gypsum and dihydrate gypsum, and then pulverized simultaneously. .
Calcium aluminate, or a mixture of calcium aluminate and anhydrous gypsum, and one or two blending ratios selected from half-water gypsum and two-water gypsum are not uniquely determined. It is preferable to mix 0.05 to 3.00 parts of one or two kinds selected from semi-water gypsum and dihydrate gypsum with respect to a total of 97.00 to 99.95 parts of anhydrous gypsum. Moreover, with respect to a total of 97.50 to 99.90 parts of calcium aluminate and anhydrous gypsum, 0.10 to 2.50 parts of one or two kinds selected from semi-water gypsum and dihydrate gypsum should be blended. Is more preferable, and 0.20-2.00 parts of one or two kinds selected from semi-water gypsum and dihydrate gypsum are blended for a total of 98.00-99.80 parts of calcium aluminate and anhydrous gypsum More preferably. If the amount of one or two kinds selected from half-water gypsum and two-water gypsum is less than 0.05 parts, it may be difficult to secure the pot life, and if it exceeds 3.00 parts, strength will be expressed. May be poor.
さらに、本発明では１日以降の強度発現性を確保するべく、カルシウムアルミネートと半水セッコウ及び二水セッコウから選ばれる１種又は２種との同時粉砕時、あるいはカルシウムアルミネートと無水セッコウ、さらに半水セッコウ及び二水セッコウから選ばれる１種及び２種との同時粉砕時に石灰系材料を配合し、粉砕することが好ましい。
本発明で使用する石灰系材料とは、分子式がＣａＯで表わされる生石灰や、分子式がＣａ（ＯＨ）２で示される消石灰を含む材料を指し、例えば、石灰系膨張材、石灰−エトリンガイト複合系膨張材などが挙げられる。これらから選ばれる１種又は２種以上を併用することも可能である。
カルシウムアルミネートと無水セッコウ、半水セッコウ及び二水セッコウから選ばれる１種又は２種の合計に対して石灰系材料の配合割合は一義的に決められるものではないが、通常、カルシウムアルミネートと無水セッコウ、半水セッコウ及び二水セッコウから選ばれる１種又は２種の合計９７．００〜９９．９５部と、石灰系材料０．０５〜３．００部を配合することが好ましい。また、カルシウムアルミネートと無水セッコウ、半水セッコウ及び二水セッコウから選ばれる１種又は２種の合計９７．５０〜９９．９０部と、石灰系材料０．１０〜２．５０部を配合することがより好ましく、カルシウムアルミネートと無水セッコウ、半水セッコウ及び二水セッコウから選ばれる１種又は２種の合計９８．００〜９９．８０部と、石灰系材料０．２０〜２．００部を配合することがさらに好ましい。石灰系材料の配合量が０．０５部未満だと、１日以降の強度発現性は石灰系材料を加えない場合と同じであり、３．００部を超えて配合すると可使時間の確保が難しくなる場合がある。
Furthermore, in the present invention, in order to ensure the strength development after 1 day, at the time of simultaneous pulverization with calcium aluminate and one or two kinds selected from half-water gypsum and two-water gypsum, or calcium aluminate and anhydrous gypsum, Furthermore, it is preferable to mix and grind the lime-based material at the time of simultaneous pulverization with one or two kinds selected from semi-water gypsum and two-water gypsum.
The lime-based material used in the present invention refers to a material containing quick lime whose molecular formula is represented by CaO and slaked lime whose molecular formula is represented by Ca (OH) 2 , for example, lime-based expansion material, lime-ettringite composite system expansion. Materials. One or two or more selected from these can be used in combination.
Although the compounding ratio of the lime-based material is not uniquely determined with respect to the total of one or two kinds selected from calcium aluminate and anhydrous gypsum, half-water gypsum and dihydrate gypsum, It is preferable to blend a total of 97.00 to 99.95 parts of one or two kinds selected from anhydrous gypsum, half water gypsum and dihydrate gypsum and 0.05 to 3.00 parts of lime-based material. In addition, a total of 97.50 to 99.90 parts of one or two kinds selected from calcium aluminate, anhydrous gypsum, half water gypsum and dihydrate gypsum and 0.10 to 2.50 parts of lime-based material are blended. More preferably, a total of 98.00 to 99.80 parts of one or two kinds selected from calcium aluminate and anhydrous gypsum, half-water gypsum and dihydrate gypsum, and 0.20 to 2.00 parts of lime-based material It is further preferable to blend. If the amount of the lime-based material is less than 0.05 parts, the strength development after 1 day is the same as the case where the lime-based material is not added, and if it exceeds 3.00 parts, the pot life can be secured. It can be difficult.
同時粉砕時の粉砕方法は、特に限定されない。例えば、ローラーミル、ジェットミル、チューブミル、ボールミル、振動ミル等の粉砕機を使用する方法が挙げられる。 The pulverization method at the time of simultaneous pulverization is not particularly limited. Examples thereof include a method using a pulverizer such as a roller mill, a jet mill, a tube mill, a ball mill, and a vibration mill.
セメント急硬材の粉末度は、特に限定されるものではないが、通常、ブレーン比表面積（以下、ブレーン値という）で３０００〜９０００ｃｍ２／ｇが好ましく、４０００〜８０００ｃｍ２／ｇがより好ましい。３０００ｃｍ２／ｇ未満では初期強度の発現性が不充分となる場合があり、９０００ｃｍ２／ｇを超えると流動性や可使時間の確保が困難となる場合がある。 The fineness of the cement hardened material is not particularly limited, but is usually preferably 3000 to 9000 cm 2 / g, more preferably 4000 to 8000 cm 2 / g in terms of the specific surface area of the brane (hereinafter referred to as the brane value). If it is less than 3000 cm 2 / g, the initial strength may be insufficiently developed, and if it exceeds 9000 cm 2 / g, it may be difficult to ensure fluidity and pot life.
本発明のセメント急硬材の配合量は、コンクリートの配合によって変化するため特に限定されるものではないが、通常、セメントとセメント急硬材からなるセメント組成物１００部中、５〜５０部が好ましく、１０〜４０部がより好ましい。５部未満では充分な急硬性能が得られない場合があり、５０部を超えて使用すると、長期材齢で強度低下が生じる場合がある。 The blending amount of the cement rapid hardening material of the present invention is not particularly limited because it varies depending on the blending of concrete, but usually 5 to 50 parts in 100 parts of a cement composition composed of cement and cement rapid hardening material. Preferably, 10 to 40 parts is more preferable. If it is less than 5 parts, sufficient rapid hardening performance may not be obtained, and if it is used in excess of 50 parts, strength reduction may occur with long-term aging.
本発明のセメント組成物で使用するセメントとしては、普通、早強、超早強、低熱、及び中庸熱等の各種ポルトランドセメント、これらセメントに高炉スラグ、フライアッシュ、シリカを混合した各種混合セメント、並びに石灰石粉末を混合したフィラーセメントなどが挙げられる。 As the cement used in the cement composition of the present invention, various portland cements such as normal, early strength, super early strength, low heat, and moderate heat, various mixed cements obtained by mixing blast furnace slag, fly ash, silica with these cements, And filler cement mixed with limestone powder.
本発明では、砂、砂利の他、減水剤、高性能減水剤、ＡＥ減水剤、高性能ＡＥ減水剤、流動化剤、消泡剤、増粘剤、防錆剤、防凍剤、収縮低減剤、高分子エマルジョン、及び凝結調整剤、並びにベントナイト等の粘土鉱物、ゼオライト等のイオン交換体、シリカ質微粉末、炭酸カルシウム、水酸化カルシウム、石膏、ケイ酸カルシウム等の無機系材料、さらに、有機系材料としては、ビニロン繊維、アクリル繊維、炭素繊維等の繊維状物質を併用することが可能である。 In the present invention, in addition to sand and gravel, water reducing agent, high performance water reducing agent, AE water reducing agent, high performance AE water reducing agent, fluidizing agent, antifoaming agent, thickener, rust preventive agent, antifreeze agent, shrinkage reducing agent , Polymer emulsions, and coagulants, and clay minerals such as bentonite, ion exchangers such as zeolite, siliceous fine powder, inorganic materials such as calcium carbonate, calcium hydroxide, gypsum, calcium silicate, and organic As the system material, a fibrous substance such as vinylon fiber, acrylic fiber, or carbon fiber can be used in combination.
「実験例１」
表１に示すように、カルシウムアルミネート（以下、ＣＡという）と無水セッコウ、さらに半水セッコウ、二水セッコウを配合し、ボールミルを用いてブレーン値で５０００ｃｍ２／ｇに粉砕してセメント急硬材とした。このセメント急硬材を使用して、セメントとセメント急硬材からなるセメント組成物１００部中、セメント急硬材を１０部使用し、このセメント組成物に砂を１５０部、水を３０部、凝結調整剤を０．８部を配合したモルタルを２０℃の室内で調製して、可使時間と圧縮強度を測定した。
なお、比較として、ＣＡと無水セッコウを混ぜただけのセメント急硬材（実験Ｎｏ．１−２３〜１−２９）、ＣＡと無水セッコウを混ぜて同時粉砕後に半水セッコウや二水セッコウを混ぜたセメント急硬材（実験Ｎｏ．１−３０〜Ｎｏ．１−５０）についても同様の実験を行った。
"Experiment 1"
As shown in Table 1, calcium aluminate (hereinafter referred to as CA) and anhydrous gypsum, further mixed with semi-aqueous gypsum and dihydrate gypsum, were pulverized to 5000 cm 2 / g with a ball mill using a ball mill. A material was used. Using this cement rapid hardening material, 10 parts of cement rapid hardening material is used out of 100 parts of cement composition consisting of cement and cement rapid hardening material, 150 parts of sand, 30 parts of water in this cement composition, A mortar containing 0.8 part of a setting modifier was prepared in a room at 20 ° C., and the pot life and compressive strength were measured.
In addition, as a comparison, cement hardener just by mixing CA and anhydrous gypsum (Experiment No. 1-23 to 1-29), mixing CA and anhydrous gypsum and mixing with half water gypsum and two water gypsum after simultaneous grinding The same experiment was conducted for the cemented hardwood (Experiment No. 1-30 to No. 1-50).
＜使用材料＞
ＣＡイ：ＣａＯ／Ａｌ２Ｏ３モル比１．０、結晶質、主成分ＣａＯ・Ａｌ２Ｏ３、１０メッシュ通過品。
ＣＡロ：ＣａＯ／Ａｌ２Ｏ３モル比１．５、結晶質、主成分ＣａＯ・Ａｌ２Ｏ３と１２ＣａＯ・７Ａｌ２Ｏ３、１０メッシュ通過品。
ＣＡハ：ＣａＯ／Ａｌ２Ｏ３モル比１．７、結晶質、主成分ＣａＯ・Ａｌ２Ｏ３と１２ＣａＯ・７Ａｌ２Ｏ３、１０メッシュ通過品。
ＣＡニ：ＣａＯ／Ａｌ２Ｏ３モル比２．０、結晶質、主成分ＣａＯ・Ａｌ２Ｏ３と１２ＣａＯ・７Ａｌ２Ｏ３、１０メッシ通過品。
ＣＡホ：ＣａＯ／Ａｌ２Ｏ３モル比１．５、非晶質、ＣＡロに試薬１級のシリカを３％添加して、１６５０℃で溶融後、急冷して合成。１０メッシュ通過品。
ＣＡヘ：ＣａＯ／Ａｌ２Ｏ３モル比１．７、非晶質、ＣＡハに試薬１級のシリカを３％添加して、１６５０℃で溶融後、急冷して合成。１０メッシュ通過品。
ＣＡト：ＣａＯ／Ａｌ２Ｏ３モル比２．０、非晶質、ＣＡニに試薬１級のシリカを３％添加して、１６５０℃で溶融後、急冷して合成。１０メッシュ通過品。
無水セッコウ：市販品、１０メッシュ通過品。
半水セッコウ：市販品、１０メッシュ通過品。
二水セッコウ：市販品、１０メッシュ通過品。
凝結調整剤：試薬１級のクエン酸２５部と試薬１級の炭酸カリウム７５部の混合物。
砂：ＪＩＳ標準砂、市販品。
セメント：普通ポルトランドセメント、市販品、ブレーン値３０００ｃｍ２／ｇ。
水：水道水。
<Materials used>
CA i: CaO / Al 2 O 3 molar ratio 1.0, crystalline, main component CaO · Al 2 O 3 , 10-mesh product.
CAro: CaO / Al 2 O 3 molar ratio 1.5, crystalline, main components CaO · Al 2 O 3 and 12CaO · 7Al 2 O 3 , 10-mesh product.
CA Ha: CaO / Al 2 O 3 molar ratio 1.7, crystalline, main components CaO · Al 2 O 3 and 12CaO · 7Al 2 O 3 , 10-mesh product.
CA ni: CaO / Al 2 O 3 molar ratio 2.0, crystalline, main components CaO · Al 2 O 3 and 12CaO · 7Al 2 O 3 , 10-mesh-passed product.
CA Ho: CaO / Al 2 O 3 molar ratio 1.5, amorphous, 3% reagent grade silica added to CA, melted at 1650 ° C., and then quenched and synthesized. 10 mesh passing product.
CA to: CaO / Al 2 O 3 molar ratio 1.7, amorphous, 3% reagent grade silica added to CA C, melted at 1650 ° C., and then rapidly cooled to synthesize. 10 mesh passing product.
CAto: CaO / Al 2 O 3 molar ratio 2.0, amorphous, 3% reagent grade silica added to CA ni, melted at 1650 ° C., and then rapidly cooled to synthesize. 10 mesh passing product.
Anhydrous gypsum: Commercial product, 10-mesh product.
Semi-water gypsum: Commercial product, 10 mesh passing product.
Two-water gypsum: a commercial product, a 10-mesh product.
Setting controller: A mixture of 25 parts of reagent grade citric acid and 75 parts of reagent grade potassium carbonate.
Sand: JIS standard sand, commercial product.
Cement: Ordinary Portland cement, commercially available, Blaine value 3000 cm 2 / g.
Water: tap water.
＜試験方法＞
同時粉砕Ａ：ＣＡと半水セッコウ及び二水セッコウから選ばれる１種又は２種を配合して同時粉砕し、粉砕後に無水セッコウ（市販品、ブレーン値５０００ｃｍ２／ｇ）を加える方法。
同時粉砕Ｂ：ＣＡと無水セッコウ、さらに半水セッコウ及び二水セッコウから選ばれる１種又は２種を配合して同時粉砕する方法。
別粉砕：ＣＡと無水セッコウを配合して同時粉砕し、粉砕後に半水セッコウ（市販品、ブレーン値５０００ｃｍ２／ｇ）及び二水セッコウ（市販品、ブレーン値５０００ｃｍ２／ｇ）から選ばれる１種又は２種を加える方法。
可使時間：温度記録計により測定し、モルタルの温度が練上りから２℃に達するまでの時間を測定した。
圧縮強度：ＪＩＳ Ｒ ５２０１に準じて４×４×１６ｃｍの試験体を作製し、３時間後、６時間後、１日後の圧縮強度を測定した。
<Test method>
Simultaneous grinding A: A method in which one or two kinds selected from CA, semi-water gypsum, and two-water gypsum are mixed and ground simultaneously, and anhydrous gypsum (commercial product, brain value 5000 cm 2 / g) is added after grinding.
Simultaneous pulverization B: A method in which CA and anhydrous gypsum are mixed, and one or two kinds selected from semi-water and gypsum are mixed and pulverized simultaneously.
Separate pulverization: CA and anhydrous gypsum are mixed and pulverized at the same time, and after pulverization, selected from semi-water gypsum (commercial product, brain value 5000 cm 2 / g) and dihydrate gypsum (commercial product, brain value 5000 cm 2 / g) A method of adding seeds or two species.
Pot life: Measured with a temperature recorder, and the time until the mortar temperature reached 2 ° C. after kneading was measured.
Compressive strength: A 4 × 4 × 16 cm specimen was prepared according to JIS R 5201, and the compressive strength after 3 hours, 6 hours and 1 day was measured.
表１の実施例Ｎｏ．１−１〜Ｎｏ．１−２２と実施例Ｎｏ．１−２３〜１−２９（ＣＡだけを粉砕し、粉砕後に無水セッコウを加えているが、表１には便宜的に同時粉砕Ａとして表記した）の比較より、ＣＡと無水セッコウに半水セッコウ及び二水セッコウから選ばれる１種又は２種を加えることで可使時間を確保できることが分かる。
また、実施例Ｎｏ．１−１〜Ｎｏ．１−２２と実施例Ｎｏ．１−３０〜Ｎｏ．１−５０の比較より、半水セッコウ及び二水セッコウから選ばれる１種又は２種をＣＡや無水セッコウと同時粉砕する場合に可使時間を確保できることが分かる。
Example No. in Table 1 1-1-No. 1-22 and Example No. From the comparison of 1-23 to 1-29 (only CA was crushed and anhydrous gypsum was added after crushing, but in Table 1 it is shown as simultaneous crushing A for convenience) And it turns out that pot life can be ensured by adding 1 type or 2 types chosen from 2 water gypsum.
In addition, Example No. 1-1-No. 1-22 and Example No. 1-30-No. From the comparison of 1-50, it can be seen that the pot life can be ensured when one or two kinds selected from semi-water gypsum and two-water gypsum are pulverized simultaneously with CA or anhydrous gypsum.
「実験例２」
半水セッコウと二水セッコウの配合量を表２に示す量に変えたこと以外は、実験例１と同様に試験した。結果を表２に併記する。
"Experimental example 2"
The test was conducted in the same manner as in Experimental Example 1 except that the blending amounts of the half-water gypsum and the two-water gypsum were changed to the amounts shown in Table 2. The results are also shown in Table 2.
表２に示すように、本発明のセメント急硬材は、半水セッコウと二水セッコウの配合量を適切に調製することで、可使時間を確保できることが分かる。 As shown in Table 2, it can be seen that the cement quick-hardening material of the present invention can ensure the pot life by appropriately adjusting the blending amounts of the semi-water gypsum and the two-water gypsum.
「実験例３」
表３に示す石灰系材料を配合して同時粉砕したこと以外は、実験例１と同様に試験した。結果を表３に併記する。
"Experiment 3"
Tests were performed in the same manner as in Experimental Example 1 except that the lime-based materials shown in Table 3 were blended and pulverized simultaneously. The results are also shown in Table 3.
＜使用材料＞
石灰系材料イ：生石灰、市販品、ブレーン値３０００ｃｍ２／ｇ。
石灰系材料ロ：消石灰、市販品、ブレーン値３０００ｃｍ２／ｇ。
石灰系材料ハ：石灰系膨張材、市販品、ブレーン値３０００ｃｍ２／ｇ。
石灰系材料ニ：石灰−エトリンガイト複合系膨張材、市販品、ブレーン値３０００ｃｍ２／ｇ。
<Materials used>
Lime-based material A: Quick lime, commercial product, brain value 3000 cm 2 / g.
Lime-based material B: slaked lime, commercial product, brain value 3000 cm 2 / g.
Lime-based material C: Lime-based expansion material, commercially available product, brain value 3000 cm 2 / g.
Lime-based material D: Lime-etringite composite expanded material, commercial product, brain value 3000 cm 2 / g.
表３に示すように、本発明のセメント急硬材はさらに石灰系材料を加えて同時粉砕することで、１日後の強度発現性が優れることが分かる。 As shown in Table 3, it can be seen that the rapid cementitious cement of the present invention is excellent in strength development after one day by further adding a lime-based material and simultaneously grinding.
「実験例４」
セメント急硬材のブレーン値を表４に示す値に変えたこと以外は、実施例１と同様に行なった。結果を表４に併記する。
"Experimental example 4"
The same procedure as in Example 1 was performed except that the brane value of the cement hardened material was changed to the values shown in Table 4. The results are also shown in Table 4.
表４に示すように、本発明のセメント急硬材はブレーン値を適切に調整することで、可使時間を確保できることが分かる。 As shown in Table 4, it can be seen that the cement quick-hardening material of the present invention can ensure the pot life by appropriately adjusting the brane value.
本発明のセメント急硬材の製造方法及びセメント急硬材により、可使時間を確保できる急硬コンクリートが製造できるので、土木・建築分野で幅広く使用することができる。 Since the rapid hardening concrete which can ensure a pot life can be manufactured with the manufacturing method of cement rapid hardening material of the present invention, and cement rapid hardening material, it can be widely used in the field of civil engineering and construction.
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