JP4695980B2 - Cement composition for steam curing product, mortar for steam curing product and concrete for steam curing product using the same - Google Patents
Cement composition for steam curing product, mortar for steam curing product and concrete for steam curing product using the same Download PDFInfo
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- 239000004568 cement Substances 0.000 title claims description 88
- 239000004567 concrete Substances 0.000 title claims description 39
- 239000000203 mixture Substances 0.000 title claims description 37
- 239000004570 mortar (masonry) Substances 0.000 title claims description 33
- 239000000428 dust Substances 0.000 claims description 61
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 59
- 239000000460 chlorine Substances 0.000 claims description 59
- 229910052801 chlorine Inorganic materials 0.000 claims description 59
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 12
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 12
- 239000004571 lime Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000011398 Portland cement Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 239000011400 blast furnace cement Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000009614 chemical analysis method Methods 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design 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
- 239000000284 extract Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum 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
- 239000006028 limestone Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 229910001950 potassium oxide Inorganic materials 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Description
本発明は、蒸気養生製品用セメント組成物並びにこれを用いた蒸気養生製品用モルタル及び蒸気養生製品用コンクリートに関するものである。 The present invention relates to a cement composition for steam curing products, a mortar for steam curing products and a concrete for steam curing products using the same.
コンクリート二次製品は一般に、コンクリートの成形工程、前養生工程、蒸気養生工程を経て製造され、このコンクリート二次製品は蒸気養生製品と称される。このような蒸気養生製品用コンクリートの製造には、一般にセメント、無水石膏等からなるセメント組成物が使用される（例えば下記特許文献１参照）。
しかしながら、前述した従来のセメント組成物においては、コンクリート又はモルタルの蒸気養生直後の脱型時における圧縮強度（以下、「脱型強度」という）が十分とは言えなかった。 However, in the conventional cement composition described above, the compressive strength (hereinafter referred to as “demolding strength”) at the time of demolding immediately after steam curing of concrete or mortar was not sufficient.
そこで、本発明は、蒸気養生後の脱型強度を十分に向上させることができる蒸気養生製品用セメント組成物、並びにこれを用いた蒸気養生製品用モルタルおよび蒸気養生製品用コンクリートを提供することを目的とする。 Therefore, the present invention provides a cement composition for steam curing products that can sufficiently improve the demolding strength after steam curing, and a mortar for steam curing products and a concrete for steam curing products using the same. Objective.
本発明者等は、上記課題を解決するため鋭意研究を重ねた結果、モルタル又はコンクリートの蒸気養生後の脱型強度の増加に、従来、その処分に苦慮していた塩素バイパスダストの特定条件下での使用が効果的であることを見出し、本発明を完成するに至った。 As a result of intensive research to solve the above-mentioned problems, the inventors have increased the demolding strength after steam curing of mortar or concrete. As a result, the present invention was completed.
即ち、本発明は、セメントおよび塩素バイパスダストを含み、塩素バイパスダストに由来する塩化物イオンが、セメント１００質量部に対して０．０２〜０．２０質量部の割合で含まれていることを特徴とする蒸気養生製品用セメント組成物である。 That is, the present invention includes cement and chlorine bypass dust, and chloride ions derived from chlorine bypass dust are contained at a ratio of 0.02 to 0.20 parts by mass with respect to 100 parts by mass of cement. It is the cement composition for steam curing products characterized.
この蒸気養生製品用セメント組成物によれば、当該セメント組成物、細骨材および水を含む蒸気養生製品用モルタル、又は、当該セメント組成物、細骨材、粗骨材、混和剤および水を含む蒸気養生製品用コンクリートの蒸気養生後の脱型強度を十分に向上させることができる。また、従来、その処分に苦慮していた塩素バイパスダストの有効利用も図られる。 According to the cement composition for steam curing product, the cement composition, the mortar for steam curing product containing fine aggregate and water, or the cement composition, fine aggregate, coarse aggregate, admixture and water. The demolding strength after steam curing of the concrete for steam curing products can be sufficiently improved. In addition, effective use of chlorine bypass dust, which has been difficult to dispose of in the past, can also be achieved.
なお、塩素バイパスダストに由来する塩化物イオンの割合がセメント１００質量部に対して０．０２質量部未満である場合、０．２０質量部を超える場合には、蒸気養生製品用セメント組成物を用いたコンクリート又はモルタルの蒸気養生後の脱型強度を十分に向上させることができない。 In addition, when the ratio of the chloride ion derived from chlorine bypass dust is less than 0.02 parts by mass with respect to 100 parts by mass of cement, when it exceeds 0.20 parts by mass, the cement composition for steam curing products is used. The demolding strength of the used concrete or mortar after steam curing cannot be sufficiently improved.
また本発明は、セメントおよび塩素バイパスダスト、細骨材および水を含み、前記塩素バイパスダストに由来する塩化物イオンが、前記セメント１００質量部に対して０．０２〜０．２０質量部の割合で含まれていることを特徴とする蒸気養生製品用モルタルである。 The present invention also includes cement and chlorine bypass dust, fine aggregate and water, and chloride ions derived from the chlorine bypass dust are in a ratio of 0.02 to 0.20 parts by mass with respect to 100 parts by mass of the cement. It is a mortar for steam curing products characterized by being contained in.
この蒸気養生製品用モルタルによれば、当該蒸気養生製品用モルタルの蒸気養生後の脱型強度を十分に向上させることができる。また、従来、その処分に苦慮していた塩素バイパスダストの有効利用も図られる。 According to the mortar for steam curing products, the demolding strength after steam curing of the mortar for steam curing products can be sufficiently improved. In addition, effective use of chlorine bypass dust, which has been difficult to dispose of in the past, can also be achieved.
また本発明は、セメントおよび塩素バイパスダスト、細骨材、粗骨材、混和剤および水を含み、前記塩素バイパスダストに由来する塩化物イオンが、前記セメント１００質量部に対して０．０２〜０．２０質量部の割合で含まれていることを特徴とする蒸気養生製品用コンクリートである。 Further, the present invention includes cement and chlorine bypass dust, fine aggregate, coarse aggregate, admixture and water, and chloride ions derived from the chlorine bypass dust are 0.02 to 100 parts by mass of the cement. It is the concrete for steam curing products characterized by being contained in the ratio of 0.20 mass part.
この蒸気養生製品用コンクリートによれば、当該蒸気養生製品用コンクリートの蒸気養生後の脱型強度を十分に向上させることができる。また、従来、その処分に苦慮していた塩素バイパスダストの有効利用も図られる。 According to the concrete for steam curing products, the demolding strength after steam curing of the concrete for steam curing products can be sufficiently improved. In addition, effective use of chlorine bypass dust, which has been difficult to dispose of in the past, can also be achieved.
本発明の蒸気養生製品用セメント組成物、蒸気養生製品用モルタルおよび蒸気養生製品用コンクリートにおいては、前記塩素バイパスダストに由来する遊離石灰が、セメント１００質量部に対して０．０２〜０．７０質量部の割合で含まれていることが好ましい。 In the cement composition for steam curing product, the mortar for steam curing product, and the concrete for steam curing product of the present invention, the free lime derived from the chlorine bypass dust is 0.02 to 0.70 with respect to 100 parts by mass of cement. It is preferable that it is contained in the ratio of the mass part.
この場合、セメント組成物を用いたコンクリート又はモルタルの蒸気養生製品の蒸気養生後の脱型強度をより十分に向上させることができる。 In this case, the demolding strength after steam curing of the concrete or mortar steam curing product using the cement composition can be more sufficiently improved.
本発明のセメント組成物、蒸気養生製品用コンクリートおよび蒸気養生製品用モルタルによれば、モルタルおよびコンクリートの蒸気養生後の脱型強度を十分に向上させることができ、従来、その処分に苦慮していた塩素バイパスダストの有効利用も図ることができる。 According to the cement composition, the concrete for steam curing products and the mortar for steam curing products of the present invention, it is possible to sufficiently improve the demolding strength of the mortar and concrete after steam curing, and it has been difficult to dispose of them. It is also possible to effectively use the chlorine bypass dust.
以下、本発明の実施形態について詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail.
（蒸気養生製品用セメント組成物）
本発明の蒸気養生製品用セメント組成物は、セメントおよび塩素バイパスダストを含み、塩素バイパスダストに由来する塩化物イオンが、セメント１００質量部に対して０．０２〜０．２０質量部の割合で含まれていることを特徴とする。
(Cement composition for steam curing products)
The cement composition for steam curing product of the present invention includes cement and chlorine bypass dust, and chloride ions derived from chlorine bypass dust are in a ratio of 0.02 to 0.20 parts by mass with respect to 100 parts by mass of cement. It is included.
この蒸気養生製品用セメント組成物によれば、当該セメント組成物、細骨材および水を含む蒸気養生製品用モルタル、又は、当該セメント組成物、細骨材、粗骨材、混和剤および水を含む蒸気養生製品用コンクリートの蒸気養生後の脱型強度を十分に向上させることができる。また、従来、その処分に苦慮していた塩素バイパスダストの有効利用も図ることができる。 According to the cement composition for steam curing product, the cement composition, the mortar for steam curing product containing fine aggregate and water, or the cement composition, fine aggregate, coarse aggregate, admixture and water. The demolding strength after steam curing of the concrete for steam curing products can be sufficiently improved. Moreover, effective use of chlorine bypass dust, which has been difficult to dispose of in the past, can also be achieved.
なお、塩化物イオン量は、セメント１００質量部に対して０．２質量部を超過しても、コンクリート及びモルタルの流動性や強度発現に大きな悪影響を及ぼすことはないが、蒸気養生後の脱型に引き続く気中養生後（例えば、材齢１４日）の圧縮強度の発現に大幅な支障をきたすと共に、鉄筋や鋼材等の補強材を使用した場合に発錆が生じる。 In addition, even if the amount of chloride ions exceeds 0.2 parts by mass with respect to 100 parts by mass of cement, the flowability and strength of concrete and mortar will not be adversely affected. Rust occurs when reinforcing materials such as reinforcing bars and steel materials are used, as well as a significant hindrance to the development of compressive strength after air curing following the mold (for example, age 14 days).
一方、塩化物イオン量は、セメント１００質量部に対して０．０２質量部未満であると、脱型強度が大きく低下する。 On the other hand, when the amount of chloride ions is less than 0.02 parts by mass with respect to 100 parts by mass of cement, the demolding strength is greatly reduced.
「塩素バイパスダスト」とは、セメント製造において、原燃料から持ち込まれる塩素化合物を、クリンカー焼成過程で低減するための設備で発生する粉粒体を言う。より詳しくは、ＳＰ方式（多段サイクロン予熱方式）またはＮＳＰ方式（仮焼炉付多段サイクロン予熱方式）によるセメント製造方式が適用されるセメント製造装置であって、原燃料を予熱する予熱部及び予熱部で予熱された原燃料を焼成して原燃料中に含まれる塩化物を揮発させて除去するロータリキルンを備えるセメント製造装置において、予熱部から焼成用ロータリーキルンの投入口までの範囲で、主としてそれ以降のキルン内焼成帯までの高温処理で揮発し、その燃焼ガスとともに予熱部又は仮焼部に逆流する塩素化合物を含む高温ガスの一部を抽出し、冷却過程で凝縮する成分をも含む粉粒体を集塵機で捕集して得られるものを言う “Chlorine bypass dust” refers to powder particles generated in equipment for reducing chlorine compounds brought from raw fuel in the clinker firing process in cement production. More specifically, it is a cement manufacturing apparatus to which a cement manufacturing system by SP system (multistage cyclone preheating system) or NSP system (multistage cyclone preheating system with calcining furnace) is applied, and a preheating section and a preheating section for preheating raw fuel. In cement manufacturing equipment equipped with a rotary kiln that burns and removes the chloride contained in the raw fuel by firing the raw fuel preheated in step 1, mainly in the range from the preheating section to the inlet of the firing rotary kiln. Part of the high temperature gas that volatilizes in the high-temperature treatment up to the kiln in the kiln and extracts a part of the high-temperature gas containing chlorine compounds that flows back to the preheating part or calcining part together with the combustion gas, and also contains components that condense in the cooling process Say what you get by collecting your body with a dust collector
本発明の蒸気養生製品用セメント組成物においては、塩素バイパスダストに由来する遊離石灰が、セメント１００質量部に対して０．０２〜０．７０質量部の割合で含まれていることが好ましい。塩素バイパスダストに由来する遊離石灰は、モルタルあるいはコンクリートを蒸気養生に先行する前養生段階において、セメントと水とからなるセメントマトリックスによる前駆的な微細組織の早期形成に有効に作用し、結果的に蒸気養生あるいはその後の気中養生後の強度発現性に好ましい効果を奏するなど、塩化物イオンによる強度発現性の向上効果を助長させるが、０．０２質量部未満では、この作用が十分に発揮されない傾向があり、０．７質量部を超えると、モルタルやコンクリートの流動性の低下、あるいは蒸気養生後に引き続く気中養生後の強度発現が低下する可能性が高くなる。 In the cement composition for steam curing products of this invention, it is preferable that the free lime derived from chlorine bypass dust is contained in the ratio of 0.02-0.70 mass part with respect to 100 mass parts of cement. Free lime derived from chlorine bypass dust works effectively in the early formation of a precursor microstructure by a cement matrix consisting of cement and water in the pre-curing stage of mortar or concrete prior to steam curing. The effect of improving the strength development by chloride ions is promoted, such as exerting a favorable effect on the strength development after steam curing or subsequent air curing, but this effect is not sufficiently exhibited at less than 0.02 parts by mass. There exists a tendency, and when it exceeds 0.7 mass part, possibility that the fall of the fluidity | liquidity of mortar or concrete or the intensity | strength expression after the air curing following steam curing will become high.
塩素バイパスダスト中の塩化物イオンの含有率が分かれば、塩素バイパスダストの質量から、塩素バイパスダストに由来する塩化物イオンの量が決定される。このため、セメント１００質量部に対する塩化物イオンの量を０．０２〜０．２０質量部の範囲にするためには、セメントに対して投入する塩素バイパスダストの量を適宜調整すればよい。 If the content of chloride ions in the chlorine bypass dust is known, the amount of chloride ions derived from the chlorine bypass dust is determined from the mass of the chlorine bypass dust. For this reason, in order to make the quantity of the chloride ion with respect to 100 mass parts of cement into the range of 0.02-0.20 mass part, what is necessary is just to adjust the quantity of the chlorine bypass dust thrown into with respect to cement suitably.
なお、塩素バイパスダストの構成成分は、抽気する部位や抽気条件（抽気ガス量、ガス温度、同伴する原料または仮焼原料量）によって大幅に異なる。主要な構成成分としては、揮発成分に由来する塩化カリウム、ＩＩ型無水石膏、硫酸塩等のほかに、仮焼原料（遊離石灰を含む）を挙げることができる。また、粉粒体の粒度組成も異なる。ちなみに、塩素バイパスダスト中の主要構成成分を例示すると、次の通りである。即ち、塩化物イオンが１〜４０質量％、より一般的には５〜３５質量％であり、Ｎａ２Ｏが０．１〜５質量％、より一般的には０．５〜３質量％であり、Ｋ２Ｏが２〜３５質量％、より一般的には５〜３０質量％であり、全ＣａＯが５〜６０質量％であり、遊離石灰（f.ＣａＯ）が２〜４０質量％、より一般的には５〜３５質量％である。各構成成分の種類によってコンクリートおよびモルタルの物性への影響度が異なる。 Note that the constituent components of the chlorine bypass dust vary greatly depending on the part to be extracted and the extraction conditions (extraction gas amount, gas temperature, entrained raw material or calcined raw material amount). Examples of main constituent components include calcined raw materials (including free lime) in addition to potassium chloride derived from volatile components, type II anhydrous gypsum, sulfate, and the like. Moreover, the particle size composition of the granular material is also different. Incidentally, the main components in the chlorine bypass dust are exemplified as follows. That is, chloride ion is 1-40% by mass, more typically 5-35% by mass, Na 2 O is 0.1-5% by mass, more typically 0.5-3% by mass. Yes, K 2 O is 2 to 35% by mass, more generally 5 to 30% by mass, total CaO is 5 to 60% by mass, free lime (f.CaO) is 2 to 40% by mass, More generally, it is 5 to 35% by mass. The degree of influence on the physical properties of concrete and mortar varies depending on the type of each component.
セメントとしては、例えばポルトランドセメント、高炉セメント等を用いることができる。ポルトランドセメントとしては、ＪＩＳ Ｒ ５２１０：２００３「ポルトランドセメント」に記載されている各種のポルトランドセメントが使用でき、使用するポルトランドセメントの種類は、設計強度および経済性等を考慮して決定される。また、高炉セメントとしては、ＪＩＳ Ｒ ５２１１:２００３「高炉セメント」に記載されているものが問題なく使用できるが、より好ましくは高炉セメントＡ種またはB種である。 Examples of cement that can be used include Portland cement and blast furnace cement. As the Portland cement, various Portland cements described in JIS R 5210: 2003 “Portland cement” can be used, and the type of Portland cement to be used is determined in consideration of design strength, economy, and the like. Moreover, as a blast furnace cement, what is described in JIS R 5211: 2003 "blast furnace cement" can be used without a problem, More preferably, it is a blast furnace cement A type or B type.
（蒸気養生製品用モルタルおよびコンクリート）
本発明の蒸気養生製品用モルタルは、セメント、塩素バイパスダスト、細骨材および水を含み、塩素バイパスダストに由来する塩化物イオンが、セメント１００質量部に対して０．０２〜０．２０質量部の割合で含まれていることを特徴とする。
(Mortar and concrete for steam curing products)
The mortar for steam curing products of the present invention contains cement, chlorine bypass dust, fine aggregate and water, and chloride ions derived from chlorine bypass dust are 0.02 to 0.20 mass relative to 100 mass parts of cement. It is characterized by being included in the proportion of parts.
また本発明の蒸気養生製品用コンクリートは、セメント、塩素バイパスダスト、細骨材、粗骨材、混和剤および水を含み、塩素バイパスダストに由来する塩化物イオンが、セメント１００質量部に対して０．０２〜０．２０質量部の割合で含まれていることを特徴とする。 The concrete for steam curing product of the present invention contains cement, chlorine bypass dust, fine aggregate, coarse aggregate, admixture and water, and chloride ions derived from chlorine bypass dust are contained in 100 parts by mass of cement. It is contained at a ratio of 0.02 to 0.20 parts by mass.
セメントおよび塩素バイパスダストとしては、上記と同様のものが用いられる。細骨材としては、例えば海砂が用いられ、粗骨材としては、例えば砕石が用いられる。混和剤としては、ＪＩＳ Ｒ ６２０４：２０００「コンクリート用化学混和剤」に記載されているもの、具体的にはスルフォン酸系、メラミン系、ポリカルボン酸系の減水剤あるいは高性能ＡＥ減水剤の何れもが使用できるが、中でも、初期強度（脱型強度）発現性の点から、ポリカルボン酸系の減水剤あるいは高性能ＡＥ減水剤が特に好ましい。なお、蒸気養生製品用モルタルにおいては、上記混和剤が含まれていてもよい。 As the cement and chlorine bypass dust, those similar to the above are used. For example, sea sand is used as the fine aggregate, and crushed stone is used as the coarse aggregate, for example. As the admixture, those described in JIS R 6204: 2000 “Chemical Admixture for Concrete”, specifically, any of sulfonic acid-based, melamine-based, polycarboxylic acid-based water reducing agents or high-performance AE water reducing agents Among them, polycarboxylic acid-based water reducing agents or high-performance AE water reducing agents are particularly preferable from the viewpoint of developing initial strength (demolding strength). Note that the admixture may be contained in the mortar for steam curing products.
本発明の蒸気養生製品用モルタルおよびコンクリートを製造する場合、セメント組成物のうち、塩素バイパスダスト（粉粒体）は、モルタルあるいはコンクリートの練混ぜ時に骨材、化学混和剤等、モルタルまたはコンクリート調製の際に添加される他の材料とともに混合しても良いが、取扱い性（二次製品工場のサイロの数に限りがあることや、セメントとダストの２系統の輸送コストがかかることなど）の点から、セメントの粉砕時にセメントクリンカー、石膏およびセメント混合材（高炉スラグ、石灰石、フライアッシュ）等とともに混合粉砕し、これを骨材、化学混和剤等、モルタルまたはコンクリート調製の際に添加される他の材料とともに混合して用いることがより好ましい。 When producing the mortar and concrete for steam curing products of the present invention, among the cement composition, chlorine bypass dust (powder) is prepared from mortar or concrete, such as aggregate, chemical admixture, etc. It may be mixed with other materials added at the time of handling, but it is easy to handle (the number of silos in the secondary product factory is limited, and transportation costs of cement and dust are two systems) In terms of cement, it is mixed and pulverized with cement clinker, gypsum and cement mixture (blast furnace slag, limestone, fly ash), etc., and added to aggregates, chemical admixtures, etc. when preparing mortar or concrete. It is more preferable to use a mixture with other materials.
本発明のセメント組成物と、骨材および水とを混練して調製したモルタルまたはコンクリートは、成形、蒸気養生して硬化体となる。本発明のセメント組成物は、使用するセメントの種類（高炉スラグ混入率）にもよるが、通常は２０〜６０分の前養生時間を取れば、２〜５時間の蒸気養生後に、強度特性に優れた硬化体を与える。 The mortar or concrete prepared by kneading the cement composition of the present invention, aggregate and water becomes a hardened body by molding and steam curing. Although the cement composition of the present invention depends on the type of cement to be used (the blast furnace slag mixing rate), it usually has strength characteristics after 2 to 5 hours of steam curing if a precuring time of 20 to 60 minutes is taken. Gives an excellent cured product.
本発明のセメント組成物は、流し込み製品、即時脱型製品、セメントボード、遠心成型製品など、二次製品全般に使用できる。また、本発明のセメント組成物は、オートクレーブ養生を行うＡＬＣ製品などにも使用できる。 The cement composition of the present invention can be used for secondary products in general, such as cast products, immediate demolding products, cement boards, and centrifugal molded products. The cement composition of the present invention can also be used for ALC products that perform autoclave curing.
以下に、実施例を挙げて、本発明を更に詳しく説明するが、本発明は以下の実施例に限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.
＜使用材料＞
（１）セメント
セメントとして、宇部興産（株）製の普通ポルトランドセメントを用いた。このポルトランドセメント中の塩化物イオン含有率は、０．００９質量％および遊離石灰量含有量は０．３１質量％である。
（２）塩素バイパスダスト
塩素バイパスダストとしては、表１に示すように、塩化物イオンおよび遊離石灰としての生石灰量が互いに異なる塩素バイパスダストＡ及び塩素バイパスダストＢの２種類を用いた。なお、表１中の塩化物イオンの含有率については、ＪＩＳ Ｒ ５２０２：１９９９「ポルトランドセメントの化学分析方法」、その他の成分、即ち酸化ナトリウム、酸化カリウムの含有率については、ＪＩＳ Ｍ ８８５３：１９９８「セラミックス用アルミノけい酸塩質原料の化学分析方法」に準じて測定した。
（３）細骨材
細骨材としては、海砂（表乾密度２．５７ｇ／ｃｍ３、吸水率 １．９７%、粗粒率 ２．７１）を用いた。
（４）粗骨材
粗骨材としては、砕石２００５（表乾密度 ２．７２ｇ／ｃｍ３、吸水率 ０．５７%、粗粒率 ６．５８）を用いた。
（５）混和剤
混和剤としては、花王（株）製 マイティ２１ＶＳ（カルボキシル基含有ポリエーテル系化合物）からなる減水剤を用いた。
（６）練混ぜ水
練混ぜ水としては、水道水を用いた。
<Materials used>
(1) Cement Normal Portland cement manufactured by Ube Industries, Ltd. was used as cement. The chloride ion content in the Portland cement is 0.009% by mass and the free lime content is 0.31% by mass.
(2) Chlorine bypass dust As shown in Table 1, two types of chlorine bypass dust, chlorine bypass dust A and chlorine bypass dust B, having different amounts of quick lime as chloride ions and free lime were used. In addition, about the content rate of the chloride ion in Table 1, JIS R 5202: 1999 "Chemical analysis method of Portland cement", About the content rate of other components, ie, sodium oxide and potassium oxide, JIS M 8853: 1998. Measured according to “Chemical analysis method of aluminosilicate raw material for ceramics”.
(3) Fine aggregate As the fine aggregate, sea sand (surface dry density 2.57 g / cm 3 , water absorption 1.97%, coarse particle ratio 2.71) was used.
(4) Coarse aggregate As the coarse aggregate, crushed stone 2005 (surface dry density 2.72 g / cm 3 , water absorption 0.57%, coarse particle rate 6.58) was used.
(5) Admixture As the admixture, a water reducing agent composed of Mighty 21VS (carboxyl group-containing polyether compound) manufactured by Kao Corporation was used.
(6) Mixing water Tap water was used as the mixing water.
（実施例２、３、５及び参考例１、４）
以下のようにして蒸気養生製品用モルタルを作製した。
(Examples 2, 3, 5 and Reference Examples 1, 4 )
The mortar for steam curing products was produced as follows.
即ち、ポルトランドセメント及び塩素バイパスダストからなるセメント組成物、細骨材並びに、混和剤を含む水（すなわち、混和剤＋水）を、２０℃の恒温室においてホバートミキサで３分間混練し、モルタルを調整した。このとき、混練した各成分の組成は、表２に示す通りとし、使用した塩素バイパスダストの種類は表３に示す通りとした。また、モルタルのフローは、ＪＩＳ Ｒ ５２０１：１９９７「セメントの物理試験方法」記載のフローコーンを用いた０打でのフローが２００mmとなるように、混和剤添加量で調整した。
上記のようにして得られたモルタルを圧縮強度試験用の供試体とし、５０mm×高さ１００mmの円筒形鋼製型枠で成形した。この成形体について、混練開始から３０分間の前養生時間が経過した後、温度７０℃、相対湿度９８％に保った恒温恒湿器に入れ４時間の蒸気養生を行い、硬化体を得た。養生終了後、恒温恒湿器から硬化体を取り出し、当該硬化体について、ＪＩＳ Ａ １１０８：１９９９「コンクリートの圧縮試験方法」に規定されている方法に準じて脱型強度を測定した。結果を表３に示す。また、塩素バイパスダストに由来する塩化物イオンの含有率と脱型強度との関係を図１に示す。更に、当該硬化体について、蒸気養生終了後、気中養生した場合の材齢１４日強度も測定した。結果を表３に示す。 The mortar obtained as described above was used as a specimen for a compressive strength test, and molded with a cylindrical steel mold having a size of 50 mm and a height of 100 mm. After 30 minutes of pre-curing time had elapsed from the start of kneading, this molded body was placed in a constant temperature and humidity chamber maintained at a temperature of 70 ° C. and a relative humidity of 98% and subjected to steam curing for 4 hours to obtain a cured body. After curing, the cured product was taken out from the thermo-hygrostat, and the demolding strength of the cured product was measured according to the method specified in JIS A 1108: 1999 “Concrete compression test method”. The results are shown in Table 3. FIG. 1 shows the relationship between the content of chloride ions derived from chlorine bypass dust and the demolding strength. Furthermore, about the said hardening body, the strength at the age of 14 days at the time of carrying out the air curing after completion | finish of steam curing was also measured. The results are shown in Table 3.
（比較例１）
塩素バイパスダストを水に投入しなかったこと以外は参考例１と同様にしてモルタルを調整し、このモルタルから、参考例１と同様にして硬化体を得た。そして、この硬化体について、参考例１と同様にして脱型強度及び材齢１４日強度を測定した。結果を表３に示す。
(Comparative Example 1)
A mortar was prepared in the same manner as in Reference Example 1 except that chlorine bypass dust was not added to water, and a cured product was obtained from this mortar in the same manner as in Reference Example 1. And about this hardened | cured material, it carried out similarly to the reference example 1, and measured the demolding intensity | strength and the strength of material age 14 days. The results are shown in Table 3.
（実施例６）
以下のようにして蒸気養生製品用コンクリートを作製した。即ち、まずポルトランドセメント及び塩素バイパスダストＢからなるセメント組成物、細骨材、粗骨材、並びに、混和剤を含む水を、２０℃の恒温室において強制２軸ミキサで２分間混練し、コンクリートを調整した。このとき、混練した各成分の組成は、表２に示す通りとし、コンクリートのスランプは、ＪＩＳ Ａ １１０１：２００５「コンクリートのスランプ試験方法」に準拠して測定した。目標スランプは８ｃｍとし、スランプの調整は、混和剤の添加量を調整することにより行った。
(Example 6)
Concrete for steam curing products was produced as follows. That is, first, a cement composition comprising Portland cement and chlorine bypass dust B, fine aggregate, coarse aggregate, and water containing an admixture are kneaded for 2 minutes with a forced biaxial mixer in a constant temperature room at 20 ° C. Adjusted. At this time, the composition of each component kneaded was as shown in Table 2, and the concrete slump was measured according to JIS A 1101: 2005 “Concrete slump test method”. The target slump was 8 cm, and the slump was adjusted by adjusting the amount of admixture added.
上記のようにして得られたコンクリートを圧縮強度試験用の供試体とし、径１００ｍｍ×高さ２００ｍｍの円筒形鋼製型枠で成形した。この成形体について、混練開始から３０分間の前養生時間が経過した後、湿度９８％に保った恒温恒湿器に入れ、最高温度７０℃まで５５℃／ｈで昇温し、昇温時間を含めて４時間の蒸気養生を行い、硬化体を得た。養生終了後、恒温恒湿器から硬化体を取り出し、この硬化体について、参考例１と同様にして脱型強度を測定した。結果を表３に示す。また、当該硬化体について、参考例１と同様にして材齢１４日強度も測定した。これらの結果を表３に示す。 The concrete obtained as described above was used as a specimen for a compressive strength test, and molded with a cylindrical steel mold having a diameter of 100 mm and a height of 200 mm. After 30 minutes of pre-curing time has elapsed from the start of kneading, this molded body is placed in a thermo-hygrostat maintained at 98% humidity, heated to a maximum temperature of 70 ° C. at 55 ° C./h, Including steam curing for 4 hours, a cured product was obtained. After curing, the cured product was taken out from the thermo-hygrostat, and the demolding strength of this cured product was measured in the same manner as in Reference Example 1. The results are shown in Table 3. Moreover, about the said hardening body, it carried out similarly to the reference example 1, and also measured the intensity | strength of material 14 days. These results are shown in Table 3.
（比較例２）
塩素バイパスダストを水に投入しなかったこと以外は実施例６と同様にしてコンクリートを調製し、このコンクリートから、実施例６と同様にして硬化体を得た。そして、この硬化体について、参考例１と同様にして脱型強度及び材齢１４日強度を測定した。結果を表３に示す。
Concrete was prepared in the same manner as in Example 6 except that chlorine bypass dust was not added to water, and a cured product was obtained from this concrete in the same manner as in Example 6. And about this hardened | cured material, it carried out similarly to the reference example 1, and measured the demolding intensity | strength and the strength of material age 14 days. The results are shown in Table 3.
実施例２、３、５、参考例１、４及び比較例１の結果より、セメントと組合せて使用する塩素バイパスダストに由来する塩化物イオン量がセメント１００質量部に対して０．０２質量部〜０．２０質量部の範囲にあれば、比較例１（Ｎ＊単味）に比べて脱型強度に優れていることがわかる。 From the results of Examples 2, 3, 5 and Reference Examples 1, 4 and Comparative Example 1, the amount of chloride ions derived from chlorine bypass dust used in combination with cement was 0.02 parts by mass with respect to 100 parts by mass of cement. If it exists in the range of -0.20 mass part, it turns out that it is excellent in the demolding strength compared with the comparative example 1 (N * plain).
また、実施例６及び比較例２の結果からも、セメントと組合せて使用する塩素バイパスダストに由来する塩化物イオン量がセメント１００質量部に対して０．０２質量部〜０．２０質量部の範囲にあれば、比較例２（Ｎ＊単味）に比べて脱型強度に優れていることがわかる。 Moreover, also from the result of Example 6 and Comparative Example 2, the amount of chloride ions derived from chlorine bypass dust used in combination with cement is 0.02 parts by mass to 0.20 parts by mass with respect to 100 parts by mass of cement. If it exists in the range, it turns out that it is excellent in the demolding intensity | strength compared with the comparative example 2 (N * plain).
なお、実施例２、３、５、６及び参考例１、４に係るセメント組成物を使用した場合の混和剤添加率は、塩素バイパスダストを使用しない比較例１，２（ＢＢ単味）とほぼ同等であり、流動性に大きな悪影響を及ぼすこともない。 In addition, the admixture addition rate at the time of using the cement composition which concerns on Example 2, 3, 5, 6 and the reference examples 1 and 4 is comparative example 1 and 2 (BB plain) which does not use chlorine bypass dust. They are almost the same and do not have a significant adverse effect on liquidity.
Claims (5)
前記塩素バイパスダストに由来する塩化物イオンが、前記セメント１００質量部に対して０．０５８〜０．２０質量部の割合で含まれ、
前記塩素バイパスダストに由来する遊離石灰が、セメント１００質量部に対して０．１３３〜０．７０質量部の割合で含まれていること、
を特徴とする蒸気養生製品用セメント組成物。 Including cement and chlorine bypass dust,
Chloride ions derived from the chlorine bypass dust are included at a ratio of 0.058 to 0.20 parts by mass with respect to 100 parts by mass of the cement ,
Free lime derived from the chlorine bypass dust is contained in a proportion of 0.133 to 0.70 parts by mass with respect to 100 parts by mass of cement ;
A cement composition for steam curing products characterized by the above.
前記塩素バイパスダストに由来する塩化物イオンが、前記セメント１００質量部に対して０．０５８〜０．２０質量部の割合で含まれ、
前記塩素バイパスダストに由来する遊離石灰が、前記セメント１００質量部に対して０．１３３〜０．７０質量部の割合で含まれていること、
を特徴とする蒸気養生製品用モルタル。 Including cement and chlorine bypass dust, fine aggregate and water,
Chloride ions derived from the chlorine bypass dust are included at a ratio of 0.058 to 0.20 parts by mass with respect to 100 parts by mass of the cement ,
Free lime derived from the chlorine bypass dust is contained in a proportion of 0.133 to 0.70 parts by mass with respect to 100 parts by mass of the cement ;
A mortar for steam curing products.
前記塩素バイパスダストに由来する塩化物イオンが、前記セメント１００質量部に対して０．０５８〜０．２０質量部の割合で含まれ、
前記塩素バイパスダストに由来する遊離石灰が、前記セメント１００質量部に対して０．１３３〜０．７０質量部の割合で含まれていること、
を特徴とする蒸気養生製品用コンクリート。 Including cement and chlorine bypass dust, fine aggregate, coarse aggregate, admixture and water,
Chloride ions derived from the chlorine bypass dust are included at a ratio of 0.058 to 0.20 parts by mass with respect to 100 parts by mass of the cement ,
Free lime derived from the chlorine bypass dust is contained in a proportion of 0.133 to 0.70 parts by mass with respect to 100 parts by mass of the cement ;
Concrete for steam curing products.
前記塩素バイパスダストに由来する塩化物イオンが、前記セメント１００質量部に対して０．０５８〜０．２０質量部の割合で含まれ、Chloride ions derived from the chlorine bypass dust are included in a ratio of 0.058 to 0.20 parts by mass with respect to 100 parts by mass of the cement,
前記塩素バイパスダストに由来する遊離石灰が、セメント１００質量部に対して０．１３３〜０．７０質量部の割合で含まれるように混合すること、Mixing so that the free lime derived from the chlorine bypass dust is contained at a ratio of 0.133 to 0.70 parts by mass with respect to 100 parts by mass of cement;
を特徴とする蒸気養生製品用セメント組成物の製造方法。A method for producing a cement composition for steam curing products.
前記塩素バイパスダストに由来する塩化物イオンが、前記セメント１００質量部に対して０．０５８〜０．２０質量部の割合で含まれ、Chloride ions derived from the chlorine bypass dust are included in a ratio of 0.058 to 0.20 parts by mass with respect to 100 parts by mass of the cement,
前記塩素バイパスダストに由来する遊離石灰が、セメント１００質量部に対して０．１３３〜０．７０質量部の割合で含まれるように混合すること、Mixing so that the free lime derived from the chlorine bypass dust is contained at a ratio of 0.133 to 0.70 parts by mass with respect to 100 parts by mass of cement;
を特徴とする蒸気養生製品用セメント組成物の脱型強度改善方法。A method for improving the demolding strength of a cement composition for steam curing products.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004231479A (en) * | 2003-01-31 | 2004-08-19 | Ube Ind Ltd | Cement-based solidifying agent |
| JP2005350337A (en) * | 2004-05-13 | 2005-12-22 | Ube Ind Ltd | Cement composition |
| JP2005350556A (en) * | 2004-06-10 | 2005-12-22 | Ube Ind Ltd | Solidifying material composition and method for solidifying treatment of soil of object to be treated |
| JP2006036571A (en) * | 2004-07-26 | 2006-02-09 | Mitsubishi Materials Corp | Cement composition |
| JP2007137722A (en) * | 2005-11-18 | 2007-06-07 | Ube Ind Ltd | Cement composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004231479A (en) * | 2003-01-31 | 2004-08-19 | Ube Ind Ltd | Cement-based solidifying agent |
| JP2005350337A (en) * | 2004-05-13 | 2005-12-22 | Ube Ind Ltd | Cement composition |
| JP2005350556A (en) * | 2004-06-10 | 2005-12-22 | Ube Ind Ltd | Solidifying material composition and method for solidifying treatment of soil of object to be treated |
| JP2006036571A (en) * | 2004-07-26 | 2006-02-09 | Mitsubishi Materials Corp | Cement composition |
| JP2007137722A (en) * | 2005-11-18 | 2007-06-07 | Ube Ind Ltd | Cement composition |
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