JP5181318B2 - Calcium sulfoaluminate clinker composition and production method thereof. - Google Patents
Calcium sulfoaluminate clinker composition and production method thereof. Download PDFInfo
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- JP5181318B2 JP5181318B2 JP2005235055A JP2005235055A JP5181318B2 JP 5181318 B2 JP5181318 B2 JP 5181318B2 JP 2005235055 A JP2005235055 A JP 2005235055A JP 2005235055 A JP2005235055 A JP 2005235055A JP 5181318 B2 JP5181318 B2 JP 5181318B2
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- 239000000203 mixture Substances 0.000 title claims description 41
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title claims description 12
- 239000011575 calcium Substances 0.000 title claims description 12
- 229910052791 calcium Inorganic materials 0.000 title claims description 12
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 36
- 239000000395 magnesium oxide Substances 0.000 claims description 21
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 21
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 21
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 19
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 19
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000292 calcium oxide Substances 0.000 claims description 13
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 claims description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 13
- 239000011707 mineral Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- 150000004645 aluminates Chemical class 0.000 claims 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 19
- 235000012255 calcium oxide Nutrition 0.000 description 10
- 235000010755 mineral Nutrition 0.000 description 9
- 238000010304 firing Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000001354 calcination Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 Calcium sulfoaluminum Chemical compound 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 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
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 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
- 230000007423 decrease Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011444 non-shrink grout Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
本発明は、酸化チタンおよび酸化マグネシウムの含有量を制御し、好ましくは更に酸化鉄含有量を制御することによって、アウインの生成を安定にしたカルシウムサルホアルミネート系クリンカー組成物とその製造方法に関する。
The present invention relates to a calcium sulfoaluminate clinker composition in which the production of auin is stabilized by controlling the contents of titanium oxide and magnesium oxide, preferably by further controlling the iron oxide content, and a method for producing the same .
アウイン（３ＣａＯ・３Ａｌ2Ｏ3・ＣａＳＯ4）は、水和反応が早く、エトリンガイトを生成して速硬性や膨張性を発現するので、アウインを主体とした組成物はコンクリートの混和材として膨張材や速硬材などに用いられている。最近、コンクリートの高性能化に応じて、コンクリートに添加される混和材の性能も多様化しており、膨張や速硬性能が安定的に発揮できるものが求められており、アウインを含有する組成物について製造上の品質安定化は重要である。 Auin (3CaO · 3Al 2 O 3 · CaSO 4 ) has a fast hydration reaction and produces ettringite to exhibit fast-hardness and expansibility. Therefore, the composition mainly composed of Auin is used as an admixture for concrete. And used for fast-hardening materials. Recently, the performance of admixtures added to concrete has diversified in accordance with the improvement in performance of concrete, and there is a demand for a material that can stably exhibit expansion and rapid hardening performance. About quality stabilization in manufacturing is important.
従来、アウイン含有組成物については、ＣａＯ源、Ａｌ2Ｏ3源、ＣａＳＯ4源、Ｆｅ2Ｏ3源の各原料を混合して焼成し、アウインのほかにカルシウムアルミノフェライトなどを含有したセメント混和材を製造することが知られている（特許文献１）。また、急硬性クリンカー組成物については、カルシウムアルミネートクリンカー原料に、酸化鉄、酸化チタン、フッ化カルシウムを添加することによって焼成温度を下げたクリンカー組成物が知られている（特許文献２）。
一般に、アウイン含有組成物のＣａＯ源として石灰石や、Ａｌ2Ｏ3源としてバンド頁岩が用いられているが、通常、石灰石には酸化マグネシウム(ＭｇＯ)が混入しており、バンド頁岩には酸化チタン(ＴｉＯ2)や酸化鉄(Fe2O3)が混入している。原料にＭｇＯ、ＴｉＯ2 やFe2O3 が混入していると、その混入量によってアウインやアルミン酸三カルシウム（３ＣａＯ・Ａｌ2Ｏ3：以下Ｃ3Ａと略記）の生成が影響を受け、また、酸化鉄が多いと溶融しやすくなり、焼成温度は低くなるので易焼成性は向上するが、カルシウムフェライト系鉱物ができやすくなるのでアウインの生成量は減少する。さらに、焼成温度が低いために結晶成長が十分ではなく、膨張性能、初期強度発現性および流動性が得られにくくなる云う問題がある。 Generally, limestone is used as the CaO source of the Auin-containing composition, and band shale is used as the Al 2 O 3 source. Usually, magnesium oxide (MgO) is mixed in the limestone, and titanium oxide is contained in the band shale. (TiO 2 ) and iron oxide (Fe 2 O 3) are mixed. MgO, TiO 2 and Fe2O3 as raw materials If it is mixed, the production of Auin and tricalcium aluminate (3CaO.Al 2 O 3 : hereinafter abbreviated as C 3 A) will be affected by the amount of the mixed material. The calcination temperature is lowered, so that the calcination property is improved. However, since the calcium ferrite mineral is easily formed, the amount of auin produced is reduced. Furthermore, since the firing temperature is low, crystal growth is not sufficient, and there is a problem that it is difficult to obtain expansion performance, initial strength development and fluidity.
このため、特許文献１のセメント混和材ではアウインなどの生成が安定せず、品質のバラツキが大きいと云う問題がある。また、特許文献２のクリンカー組成物はＣ3Ａやアルミン酸三カルシウムフェライト（４ＣａＯ・Ａｌ2Ｏ3・Ｆｅ2Ｏ3：以下Ｃ4ＡＦと略記）の生成量が多くなり、この場合もアウインの生成量が低下するとともに品質のバラツキが大きいと云う問題がある。 For this reason, in the cement admixture of Patent Document 1, there is a problem that the generation of auin and the like is not stable and the quality varies greatly. In addition, the clinker composition of Patent Document 2 generates a large amount of C 3 A and tricalcium aluminate ferrite (4CaO · Al 2 O 3 · Fe 2 O 3 : hereinafter abbreviated as C 4 AF). There is a problem in that the amount of the produced is reduced and the variation in quality is large.
本発明は、アウイン含有組成物について従来の上記問題を解決したものであり、アウインの生成が安定であって品質のバラツキが少ないアウイン含有組成物とその製造方法を提供する。
The present invention solves the above-mentioned conventional problems for an Auin-containing composition, and provides an Auin-containing composition that is stable in producing Auin and has little variation in quality, and a method for producing the same.
本発明によれば以下のカルシウムサルホアルミネート系クリンカー組成物とその製造方法が提供される。
〔１〕化学成分としてＳｉＯ2を７.０〜２４.５wt％、Ａｌ2Ｏ3を１２.７〜３８.３wt％、ＣａＯを４０.０〜５６.１wt％含有し、クリンカ鉱物相としてアルミン酸三カルシウム(３ＣａＯ・Ａｌ2Ｏ3)およびアウインを含有するクリンカー組成物において、化学成分としての酸化チタン含有量１wt％以下、酸化マグネシウム含有量１wt％〜３wt％、酸化鉄含有量１.０wt％〜６.６wt％であり、クリンカ鉱物相としてのアウインとアルミン酸三カルシウムとの合計量においてアウインの含有量が９０％以上であることを特徴とするカルシウムサルホアルミネート系クリンカー組成物。
〔２〕ＣａＯ源の石灰石、Ａｌ2Ｏ3源のバンド頁岩、ＣａＳＯ4源、Ｆｅ2Ｏ3源、およびシリカの各原料を粉末にし、化学成分としてＳｉＯ2を７.０〜２４.５wt％、Ａｌ2Ｏ3を１２.７〜３８.３wt％、ＣａＯを４０.０〜５６.１wt％含有し、クリンカ鉱物相としてアルミン酸三カルシウム(３ＣａＯ・Ａｌ2Ｏ3)およびアウインを含有するクリンカー組成物において、化学成分としての酸化チタン含有量１wt％以下、酸化マグネシウム含有量１wt％〜３wt％、酸化鉄含有量１.０wt％〜６.６wt％であり、クリンカ鉱物相としてのアウインとアルミン酸三カルシウムとの合計量においてアウインの含有量が９０％以上になるように上記原料粉末を混合し、１２５０℃〜１３５０℃で焼成することを特徴とするカルシウムサルホアルミネート系クリンカー組成物の製造方法。
According to the present invention, the following calcium sulfoaluminate clinker composition and a method for producing the same are provided.
[1] a SiO 2 7.0~ 24.5 wt% as chemical components, the Al 2 O 3 12.7~ 38.3 wt% , a CaO containing 40.0～56.1Wt%, clinker mineral phase In a clinker composition containing tricalcium aluminate (3CaO · Al 2 O 3 ) and Auin as a chemical component, the titanium oxide content is 1 wt% or less, the magnesium oxide content is 1 wt% to 3 wt%, and the iron oxide content is 1 Calcium sulfoaluminate-based clinker composition characterized in that the content of Auin is 90% or more in the total amount of Auin and tricalcium aluminate as a clinker mineral phase. .
[2] The raw materials of CaO source limestone, Al 2 O 3 source band shale, CaSO 4 source, Fe 2 O 3 source, and silica are powdered, and SiO 2 as a chemical component is 7.0 to 24.5 wt. %, the Al 2 O 3 12.7~ 38.3 wt% , a CaO containing 40.0～56.1Wt%, containing tricalcium aluminate (3CaO · Al 2 O 3) and Auin as clinker mineral phase The clinker composition has a titanium oxide content of 1 wt% or less as a chemical component, a magnesium oxide content of 1 wt% to 3 wt%, an iron oxide content of 1.0 wt% to 6.6 wt%, and an auin as a clinker mineral phase The calcium sulfoaluminate-based crystal is characterized in that the raw material powder is mixed so that the content of auin is 90% or more in the total amount of calcium and tricalcium aluminate and calcined at 1250 ° C to 1350 ° C. The manufacturing method of a tanker composition.
本発明のクリンカー組成物は、アウインが安定に生成し、Ｃ3Ａよりもアウインの生成量が格段に多いので、適度な急硬性と優れた膨張性を発揮する。また、アウインの生成量が安定しているので品質の安定なクリンカー組成物を得ることができる。 In the clinker composition of the present invention, the auin is stably generated, and the amount of auin generated is much larger than that of C 3 A. Therefore, the clinker composition exhibits moderate rapid hardness and excellent expansibility. Moreover, since the amount of Auin produced is stable, a stable quality clinker composition can be obtained.
さらに、本発明によれば、酸化チタンおよび酸化マグネシウムの含有量を制御することによって、１３５０℃以下の焼成温度でＣ3Ａよりもアウインの生成量が格段に多いクリンカー組成物を得ることができる。 Furthermore, according to the present invention, by controlling the content of titanium oxide and magnesium oxide, it is possible to obtain a clinker composition in which the amount of auin generated is significantly higher than that of C 3 A at a firing temperature of 1350 ° C. or less. .
本発明のクリンカー組成物は、化学成分としてＳｉＯ2を７.０〜２４.５wt％、Ａｌ2Ｏ3を１２.７〜３８.３wt％、ＣａＯを４０.０〜５６.１wt％含有し、クリンカ鉱物相としてアルミン酸三カルシウム(３ＣａＯ・Ａｌ2Ｏ3)およびアウインを含有するクリンカー組成物において、化学成分としての酸化チタン含有量１wt％以下、酸化マグネシウム含有量１wt％〜３wt％、酸化鉄含有量１.０wt％〜６.６wt％であり、クリンカ鉱物相としてのアウインとアルミン酸三カルシウムとの合計量においてアウインの含有量が９０％以上であることを特徴とするカルシウムサルホアルミネート系クリンカー組成物である。
さらに、本発明の製造方法は、ＣａＯ源の石灰石、Ａｌ2Ｏ3源のバンド頁岩、ＣａＳＯ4源、Ｆｅ2Ｏ3源、およびシリカの各原料を粉末にし、化学成分としてＳｉＯ2を７.０〜２４.５wt％、Ａｌ2Ｏ3を１２.７〜３８.３wt％、ＣａＯを４０.０〜５６.１wt％含有し、クリンカ鉱物相としてアルミン酸三カルシウム(３ＣａＯ・Ａｌ2Ｏ3)およびアウインを含有するクリンカー組成物において、化学成分としての酸化チタン含有量１wt％以下、酸化マグネシウム含有量１wt％〜３wt％、酸化鉄含有量１.０wt％〜６.６wt％であり、クリンカ鉱物相としてのアウインとアルミン酸三カルシウムとの合計量においてアウインの含有量が９０％以上になるように上記原料粉末を混合し、１２５０℃〜１３５０℃で焼成することを特徴とするカルシウムサルホアルミネート系クリンカー組成物の製造方法である。
Clinker composition of the present invention, the SiO 2 7.0~ 24.5 wt%, the Al 2 O 3 12.7~ 38.3 wt% , 40.0~56.1wt% of CaO contained as chemical components In the clinker composition containing tricalcium aluminate (3CaO.Al 2 O 3 ) and auin as the clinker mineral phase, the titanium oxide content as a chemical component is 1 wt% or less, the magnesium oxide content is 1 wt% to 3 wt%, Calcium sulfoaluminum characterized in that the iron oxide content is 1.0 wt% to 6.6 wt%, and the content of Auin is 90% or more in the total amount of Auin and tricalcium aluminate as the clinker mineral phase. This is a nate clinker composition.
Furthermore, in the production method of the present invention, the raw materials of CaO source limestone, Al 2 O 3 source band shale, CaSO 4 source, Fe 2 O 3 source, and silica are powdered, and SiO 2 as a chemical component is 7. 0 to 24.5 wt%, Al 2 O 3 12.7 to 38.3 wt%, CaO 40.0 to 56.1 wt%, and tricalcium aluminate (3CaO · Al 2 O as a clinker mineral phase) 3 ) In the clinker composition containing Auin, the titanium oxide content as a chemical component is 1 wt% or less, the magnesium oxide content is 1 wt% to 3 wt%, the iron oxide content is 1.0 wt% to 6.6 wt%, The above-mentioned raw material powder is mixed so that the content of Auin is 90% or more in the total amount of Auin as a clinker mineral phase and tricalcium aluminate, and calcined at 1250 ° C to 1350 ° C. This is a method for producing a rufoaluminate clinker composition.
酸化チタン量が１wt％よりも多くなると、易焼成性が低下して焼成し難くなる。例えば、焼成温度が１２５０℃では反応が不十分になり、遊離酸化カルシウム量が多く、アウインの生成量は少ない。一方、これより高い温度で焼成すると、Ｃ3Ａが多くなり、ＳＯ3が揮散するので、やはり十分なアウインの生成量が得られない。 When the amount of titanium oxide is more than 1 wt%, the calcination property is lowered and the calcination becomes difficult. For example, when the firing temperature is 1250 ° C., the reaction becomes insufficient, the amount of free calcium oxide is large, and the amount of Auin produced is small. On the other hand, when firing at a temperature higher than this, C 3 A increases and SO 3 is volatilized, so that a sufficient amount of Auin cannot be obtained.
酸化マグネシウムの存在によって、Ｃ3Ａの生成が抑制される一方、アウインの生成が促進される。酸化マグネシウムの含有量が１wt％よりも少なくと、アウイン生成促進効果が不十分である。一方、酸化マグネシウム含有量が３wt％よりも多くなると、酸化チタンの場合と同様に易焼成性が低下するので好ましくない。 The presence of magnesium oxide suppresses the production of C 3 A, while promoting the production of Auin. If the content of magnesium oxide is less than 1 wt%, the effect of promoting auin formation is insufficient. On the other hand, if the magnesium oxide content is more than 3 wt%, the calcination property is lowered as in the case of titanium oxide, which is not preferable.
酸化鉄の含有量は０.５wt％〜８wt％が好ましく、１.０〜６.６wt％がより好ましい。酸化鉄を含有することによって焼成しやすくなり、また、セメントにした場合の瞬結を抑制できるなど物性を穏やかにする利点がある。酸化鉄の含有量が０.５wt％より少ないと、この効果が乏しい。一方、酸化鉄含有量が８wt％よりも多いと、カルシウムアルミノフェライトの生成量が多くなり、カルシウムおよびアルミニウムが消費されるのでアウインの生成量が少なくなり、十分な量のアウインが得られない。また、酸化鉄含有量が多いと焼成温度との兼ね合いで品質のバラツキが大きくなる。
The content of iron oxide is preferably 0.5 wt% to 8 wt%, more preferably 1.0 to 6.6 wt%. By containing iron oxide, it becomes easy to fire, and there is an advantage that the physical properties are gentle, such as being able to suppress instantaneous setting when cemented. If the content of iron oxide is less than 0.5 wt%, this effect is poor. On the other hand, if the iron oxide content is more than 8 wt%, the amount of calcium aluminoferrite generated increases, and calcium and aluminum are consumed, so the amount of Auin generated decreases, and a sufficient amount of Auin cannot be obtained. Moreover, when there is much iron oxide content, the variation in quality will become large by balance with a calcination temperature.
酸化チタン、酸化マグネシウム、および好ましくは酸化鉄の各含有量をおのおの上記範囲内に制御することによって、アウインとアルミン酸三カルシウム(Ｃ3Ａ)との合計量においてアウインの含有量が９０％以上のクリンカー組成物を得ることができる。 By controlling each content of titanium oxide, magnesium oxide, and preferably iron oxide within the above ranges, the content of Auin is 90% or more in the total amount of Auin and tricalcium aluminate (C 3 A). The clinker composition can be obtained.
また、酸化チタン、酸化マグネシウム、および好ましくは酸化鉄の各含有量をおのおの上記範囲内に制御することによって、１２５０℃〜１３５０℃の焼成温度で、アウイン生成量の多いクリンカー組成物を得ることができる。アーウインの結晶成長は、焼成温度が１１００℃、１２００℃よりも焼成温度が高いほうが顕著であるが、１３５０℃以上ではＳＯ3分が揮散し、またＣ3Ａが生成しやすくなるため、これにカルシウムおよびアルミニウムが消費されるのでアーウインの生成量が少なくなる。Ｃ3Ａ量が多過ぎると急結性が著しくなり、十分な可使時間を保てないので使用し難いものになる。 Further, by controlling the contents of titanium oxide, magnesium oxide, and preferably iron oxide within the above ranges, it is possible to obtain a clinker composition having a large amount of auin generation at a firing temperature of 1250 ° C. to 1350 ° C. it can. The crystal growth of Irwin is remarkable when the firing temperature is higher than 1100 ° C and 1200 ° C. However, at 1350 ° C or higher, SO3 content is volatilized and C 3 A is easily generated. Since aluminum and aluminum are consumed, the amount of erwin produced is reduced. If the amount of C 3 A is too large, quick setting becomes remarkable, and it is difficult to use because sufficient pot life cannot be maintained.
酸化チタン、酸化マグネシウム、および好ましくは酸化鉄の各含有量をおのおの上記範囲に制御し、１２５０℃〜１３５０℃で焼成することによって、アウインが安定に生成し、Ｃ3Ａよりもアウイン含有量が格段に多いクリンカー組成物を得ることができる。 By controlling each content of titanium oxide, magnesium oxide, and preferably iron oxide within the above ranges, and firing at 1250 ° C. to 1350 ° C., the auin is stably generated, and the auin content is higher than that of C 3 A. A much larger clinker composition can be obtained.
本発明のクリンカー組成物は、Ｃ3Ａよりもアウイン含有量が格段に多く、具体的には、アウインとＣ3Ａとの合計量においてアウインの含有量が９０％以上のクリンカー組成物である。従って、本発明のクリンカー組成物は十分な可使時間と適度な急結性、および十分な膨張性を有し、コンクリートの収縮補償混和剤、無収縮グラウト材、速硬性注入材、セルフレベリング材などに適する。 The clinker composition of the present invention is a clinker composition that has a much higher Auin content than C 3 A, and specifically has an Auin content of 90% or more in the total amount of Auin and C 3 A. . Therefore, the clinker composition of the present invention has sufficient pot life, moderate rapid setting, and sufficient expandability, concrete shrinkage compensation admixture, non-shrink grout material, fast-curing injection material, self-leveling material. Suitable for etc.
以下、本発明を実施例および比較例によって具体的に示す。
〔実施例１〜６，比較例１〜９〕
生石灰、バンド頁岩、スラグ、無水石膏の各原料を粉末にして混合し、カルシウム分、シリカ、アルミナ、鉄分、石膏分、酸化チタン、酸化マグネシウム、および酸化鉄の配合量をおのおの表１に示すように調整した。この混合原料粉末を１２５０℃〜１３５０℃で焼成し、クリンカー組成物を製造した。このクリンカー組成物のアウイン含有量、Ｃ3Ａとアウインの合計量におけるアウインの含有比を表１に示した。
このクリンカー組成物をセメントに混合し、水を加えてペーストを調製し、可使時間と強度の発現状態を調べた。この結果を表２に示した。
Hereinafter, the present invention will be specifically described by Examples and Comparative Examples.
[Examples 1-6, Comparative Examples 1-9]
Each raw material of quicklime, band shale, slag, and anhydrous gypsum is mixed in powder form, and the amounts of calcium, silica, alumina, iron, gypsum, titanium oxide, magnesium oxide, and iron oxide are shown in Table 1. Adjusted. This mixed raw material powder was fired at 1250 ° C. to 1350 ° C. to produce a clinker composition. The auin content of this clinker composition and the auin content ratio in the total amount of C 3 A and auin are shown in Table 1.
This clinker composition was mixed with cement, water was added to prepare a paste, and the working time and strength expression were examined. The results are shown in Table 2.
表１に示すように、本発明によれば、酸化チタンおよび酸化マグネシウムの量を調整することによって、アウインの生成を促す一方、Ｃ3Ａの生成を抑制し、アウインの生成量がＣ3Ａとアウインの合計量の９０％以上であるクリンカー組成物を得ることができる。表２に示すように、この本発明のクリンカー組成物は普通セメントと混合して使用したときに、十分な可使時間が得られ、また２時間〜２８日の強度も高く、優れた急結性を有している。 As shown in Table 1, according to the present invention, by adjusting the amounts of titanium oxide and magnesium oxide, the production of auin is promoted, while the production of C 3 A is suppressed, and the production amount of auin is C 3 A And a clinker composition that is 90% or more of the total amount of Auin. As shown in Table 2, when the clinker composition of the present invention is used by mixing with ordinary cement, a sufficient pot life is obtained, and the strength is high for 2 to 28 days. It has sex.
酸化チタンおよび酸化マグネシウムの量を調整してアウインの生成量を制御する本発明の作用効果は、アウイン生成量の幅広い範囲において適用することができる。実施例に示すように、アウインの生成量はアルミナおよびシリカの含有量によっても異なり、例えば、アルミナ量が多くてシリカ量が少なくとアウインの生成量が多く、クリンカ組成物全体のアウインの量は７４wt％程度であり（参考例２、実施例２）、一方、シリカ量が多くてアルミナ量が少ないとアウインの生成量が少なく、クリンカ組成物全体のアウインの量は２５wt％程度である（参考例３、実施例３）。これら何れの場合においても、酸化チタンおよび酸化マグネシウムの量を調整することによってＣ3Ａの生成を抑制してアウインの生成を促すことができ、アウインの生成量がＣ3Ａとアウインの合計量の９０％以上であるクリンカー組成物を得ることができる。因みに、表２に示すように、アーウインが多い場合でも少ない場合においても、これを粉砕し、セメントとの混合割合を適切に調整することによって、速硬性能と強度発現性のバラツキは小さく、品質は安定している。
The effect of this invention which controls the production amount of an auin by adjusting the quantity of a titanium oxide and a magnesium oxide can be applied in the wide range of an auin production amount. As shown in the examples, the amount of Auin produced also varies depending on the contents of alumina and silica.For example, if the amount of alumina is large and the amount of silica is small, the amount of Auin is large, and the amount of Auin in the entire clinker composition is is about 74 wt% (reference example 2, example 2), whereas, most silica amount less the amount of Auin with small amounts of alumina, the amount of Auin the entire clinker composition is about 25 wt% (reference Example 3, Example 3) . In any of these cases, by adjusting the amounts of titanium oxide and magnesium oxide, it is possible to suppress the production of C3A and promote the production of auin, and the production amount of auin is 90% or more of the total amount of C3A and auin. A clinker composition can be obtained. By the way, as shown in Table 2, whether or not there is a lot of erwin, by pulverizing it and adjusting the mixing ratio with cement appropriately, the variation in fast-curing performance and strength development is small, quality Is stable.
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