JP2003095711A - Unfired cement hardened body and method for producing the same - Google Patents
Unfired cement hardened body and method for producing the sameInfo
- Publication number
- JP2003095711A JP2003095711A JP2001295587A JP2001295587A JP2003095711A JP 2003095711 A JP2003095711 A JP 2003095711A JP 2001295587 A JP2001295587 A JP 2001295587A JP 2001295587 A JP2001295587 A JP 2001295587A JP 2003095711 A JP2003095711 A JP 2003095711A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- silica fume
- slaked lime
- sodium silicate
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】
【課題】 製造に際して発生する炭酸ガス量を削減し
て、省エネルギー、ＣＯ２排出量削減などを効果的に実
現でき、硬化後には充分な強度が得られる不焼成セメン
ト硬化体およびその製造方法を提供することを課題とす
る。
【解決手段】 不焼成セメント硬化体は水硬性アルミ
ナと、非晶質無水珪酸であるシリカフューム又は／及び
珪酸ナトリウム水溶液と、消石灰と、石膏と、水との混
合物を常温養生又は蒸気養生により硬化して得られるよ
うに構成し、その製造方法は水硬性アルミナと、非晶質
無水珪酸であるシリカフューム又は／及び珪酸ナトリウ
ム水溶液と、消石灰と、石膏との組合せに水を混合し、
この混合物を型枠に流し込み、常温養生または蒸気養生
により硬化するように構成する。(57) Abstract: by reducing the amount of carbon dioxide gas generated in manufacturing, energy saving, CO, etc. 2 emission reduction can be effectively realized, unburned cement hardened body sufficient strength can be obtained after curing And a method for manufacturing the same. SOLUTION: A hardened cement body is obtained by hardening a mixture of hydraulic alumina, silica fume or / and sodium silicate aqueous solution which is amorphous silicic anhydride, slaked lime, gypsum, and water by room temperature curing or steam curing. The manufacturing method is a hydraulic alumina, silica fume or / and sodium silicate aqueous solution of amorphous silicic acid anhydride, and mixed with slaked lime, gypsum water,
The mixture is poured into a mold and is configured to be cured by room temperature curing or steam curing.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、セメント製造に際
し発生する炭酸ガス量を効果的に削減する不焼成セメン
ト硬化体およびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-fired cement hardened product that effectively reduces the amount of carbon dioxide gas generated during cement production, and a method for producing the same.
【０００２】[0002]
【従来の技術】セメント産業における化石燃料起源のＣ
Ｏ２の排出量は約６６７×１０４トン／年（１９９８年
度）と試算されている。それはわが国の全ＣＯ２排出量
の約２％、産業部門から発生するＣＯ２排出量の約６％
と推定されている。近年、地球温暖化防止対策が強く求
められて、日本のセメント業界も省エネルギーなどの対
策を徹底することによって、循環型社会への貢献を迫ら
れている。しかし、環境対策が世界をリードしているド
イツのセメント業界が定めた２００５年目標値、２８０
０ＭＪ／ｔをすでに日本はクリアーしており、これ以上
の省エネルギーを推進することは容易ではない。また、
高炉スラグ微粉末とII型無水石膏とを組み合わせ、ある
条件下で水和させる高硫酸塩スラグセメントとして不焼
成セメントはあるが、低温で反応しないとか、特定のア
ルカリなどの刺激剤が必要だとか、いろいろと問題があ
り、実用化しなかった。2. Description of the Related Art C originating from fossil fuels in the cement industry
The amount of O 2 emitted is estimated to be about 667 × 10 4 tons / year (FY 1998). It is about 2% of total CO 2 emissions in Japan and about 6% of CO 2 emissions from the industrial sector.
It is estimated that In recent years, there has been a strong demand for measures to prevent global warming, and the Japanese cement industry is also forced to contribute to a recycling-oriented society by thoroughly implementing measures such as energy saving. However, the 2005 target value set by the German cement industry, which is the world leader in environmental measures, is 280
Japan has already cleared 0 MJ / t, and it is not easy to promote further energy conservation. Also,
There is unburned cement as a high sulfate slag cement that combines blast furnace slag fine powder and type II anhydrous gypsum and hydrates under certain conditions, but it does not react at low temperature, or it requires a stimulant such as a specific alkali. , There were various problems, and it was not put to practical use.
【０００３】〔問題点〕従来から、不焼成セメントとし
ては、高炉スラグを用いた高硫酸塩スラグセメントが不
焼成で固化することが知られていた。しかし、反応を促
進する目的で石膏を８００℃前後の温度で一旦仮焼した
II型無水石膏としなければならなかった。また、さらに
反応を加速するために、一般に蒸気養生を施されたが、
硬化は不十分で、充分な強度が得られなかった。[Problem] Conventionally, as a non-fired cement, it has been known that a high sulfate slag cement using blast furnace slag is solidified without firing. However, the gypsum was once calcined at a temperature of around 800 ° C. for the purpose of promoting the reaction.
Type II anhydrous gypsum had to be made. Also, in order to further accelerate the reaction, it was generally steam-cured,
The curing was insufficient and sufficient strength could not be obtained.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、従来の技術
における前記問題点に鑑みて成されたものであり、これ
を解決するため具体的に設定した技術的な課題は、製造
に際し発生する炭酸ガス量を削減して、省エネルギー、
ＣＯ２排出量削減などを効果的に実現でき、硬化後には
充分な強度が得られる不焼成セメント硬化体およびその
製造方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems in the prior art, and a technical problem specifically set to solve this problem occurs during manufacturing. Energy savings by reducing the amount of carbon dioxide
It is an object of the present invention to provide a non-fired cement hardened product which can effectively realize reduction of CO 2 emission and the like and which can obtain sufficient strength after hardening, and a method for producing the same.
【０００５】[0005]
【課題を解決するための手段】前記課題を効果的に解決
できる具体的に構成された手段としての、本発明におけ
る請求項１に係る不焼成セメント硬化体は、水硬性アル
ミナと、非晶質無水珪酸であるシリカフューム又は／及
び珪酸ナトリウム水溶液と、消石灰と、石膏と、水との
混合物を常温養生又は蒸気養生により硬化されて得られ
た硬化体であることを特徴とするものである。As a concretely constructed means capable of effectively solving the above-mentioned problems, a non-fired cement hardened product according to claim 1 of the present invention is a hydraulic alumina and an amorphous material. It is a cured product obtained by curing a mixture of silica fume or / and sodium silicate aqueous solution which is silicic acid anhydride, slaked lime, gypsum and water by room temperature curing or steam curing.
【０００６】また、請求項２に係る不焼成セメント硬化
体は、前記水硬性アルミナは水と接触して水酸化アルミ
ニウムを生成する遷移アルミナであって、結晶形はカイ
アルミナ（χ−Ａｌ２Ｏ３）およびローアルミナ（ρ−
Ａｌ２Ｏ３）を主成分とすることを特徴とする。Further, in the non-fired cement hardened product according to claim 2, the hydraulic alumina is a transition alumina which forms aluminum hydroxide upon contact with water, and has a crystal form of chi-alumina (χ-Al 2 O). 3 ) and rho-alumina (ρ-
Al 2 O 3 ) as a main component.
【０００７】また、請求項３に係る不焼成セメント硬化
体は、構成成分として前記水硬性アルミナ５〜２５重量
％と、前記非晶質無水珪酸であるシリカフューム又は／
及び珪酸ナトリウム水溶液を珪酸成分として前記シリカ
フューム１５〜４５重量％相当量と、前記消石灰４０〜
７０重量％と、前記石膏約５％と、前記水を残量分とを
混合することを特徴とする。Further, the non-fired cement hardened product according to a third aspect of the present invention comprises 5 to 25% by weight of the hydraulic alumina as the constituents, and the silica fume or / or the amorphous silicic acid anhydride.
And 15 to 45% by weight of the silica fume, which is an aqueous solution of sodium silicate as a silicic acid component, and 40 to 40 of the slaked lime.
70% by weight, about 5% of the gypsum, and the remaining amount of the water are mixed.
【０００８】また、請求項４に係る不焼成セメント硬化
体の製造方法は、水硬性アルミナと、非晶質無水珪酸で
あるシリカフューム又は／及び珪酸ナトリウム水溶液
と、消石灰と、石膏との組合せに水を混合し、この混合
物を型枠に流し込み、常温養生または蒸気養生により硬
化したことを特徴とするものである。The method for producing a non-fired cement hardened product according to a fourth aspect of the present invention is a combination of hydraulic alumina, silica fume which is amorphous anhydrous silicic acid and / or an aqueous solution of sodium silicate, slaked lime, and gypsum. Are mixed, the mixture is poured into a mold, and cured by normal temperature curing or steam curing.
【０００９】[0009]
【発明の実施の形態】以下、本発明の実施の形態を具体
的に説明する。ただし、この実施の形態は、発明の趣旨
をより良く理解させるため具体的に説明するものであ
り、特に指定のない限り、発明内容を限定するものでは
ない。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below. However, this embodiment is specifically described for better understanding of the gist of the invention, and does not limit the content of the invention unless otherwise specified.
【００１０】〔構成〕この実施の形態における不焼成セ
メント硬化体は、水硬性アルミナ（５〜２５重量％）、
シリカフューム又は／及び珪酸ナトリウム水溶液（珪酸
成分としてシリカフューム１５〜４５重量％相当量）、
消石灰（４０〜７０重量％）と石膏（約５重量％）との
混合物に水を混合して、型枠に流し込み、常温養生また
は蒸気養生により硬化された、建材等に利用できる材料
である。[Structure] The non-fired cement hardened material in this embodiment is made of hydraulic alumina (5 to 25% by weight),
Silica fume or / and sodium silicate aqueous solution (15 to 45% by weight of silica fume as silicic acid component),
It is a material that can be used as a building material or the like, in which water is mixed with a mixture of slaked lime (40 to 70% by weight) and gypsum (about 5% by weight), poured into a mold, and cured by room temperature curing or steam curing.
【００１１】水硬性アルミナはそれ自体水を添加すると
再水和反応を起こし、粒子と粒子が凝集し、硬化する性
質を持っている。水硬性アルミナが３５重量％を越える
と急結して練り混ぜ不能になり、パサパサな状態で型枠
に詰められなくなる。水硬性アルミナが多くても水との
反応で水酸化アルミニウムとなり、水分をとられて十分
なハンドリングが保てないし、硬化しない。[0011] Hydraulic alumina itself has the property of undergoing a rehydration reaction when water is added, causing particles to aggregate and harden. If the hydraulic alumina exceeds 35% by weight, it will be rapidly set, and it will be impossible to knead and mix, and it will not be possible to pack it in a mold in a dry state. Even if a large amount of hydraulic alumina is present, it reacts with water to form aluminum hydroxide, which absorbs moisture to maintain sufficient handling and does not cure.
【００１２】シリカフュームは非晶質無水珪酸からな
り、粉末度は２０ｍ２／ｇと非常に細かい超微粒子であ
る。また、カルシウムとの反応が早くカルシウムシリケ
ート水和物を作る。同様の珪酸成分として、珪酸ナトリ
ウム水溶液がある。この珪酸ナトリウム水溶液はその構
成成分に含まれるアルカリの刺激を受けて珪酸成分が溶
けやすくなるのでさらに反応は促進される。Silica fume is made of amorphous silicic acid anhydride and has a fineness of 20 m 2 / g, which are very fine particles. It also reacts quickly with calcium to produce calcium silicate hydrate. A similar silicic acid component is an aqueous solution of sodium silicate. This sodium silicate aqueous solution is stimulated by the alkali contained in its constituents, and the silicic acid component is easily dissolved, so that the reaction is further accelerated.
【００１３】消石灰はカルシウム成分として添加され、
水硬性アルミナのアルミネート成分と急激に反応してエ
トリンガイトを、シリカフューム又は／及び珪酸ナトリ
ウム水溶液はシリケート成分と反応してカルシウムシリ
ケート水和物を作る。この消石灰の粉末度は細かい方が
良いが４０００ｃｍ２／ｇ以上あれば十分である。Slaked lime is added as a calcium component,
The ettringite reacts rapidly with the aluminate component of hydraulic alumina to form ettringite, and the silica fume and / or aqueous sodium silicate solution reacts with the silicate component to form calcium silicate hydrate. The finer the fineness of this slaked lime, the better, but 4000 cm 2 / g or more is sufficient.
【００１４】水硬性アルミナと消石灰と水だけで調整し
た場合には、反応が早すぎて凝結が調整できず、ハンド
リングがうまく調整できない。シリカフューム又は／及
び珪酸ナトリウム水溶液のうち、シリカフュームを用い
る場合には、水硬性アルミナと消石灰の比は水硬性アル
ミナと消石灰の合計重量に対して水硬性アルミナが１７
重量％以上であり、しかも消石灰の配合が２０重量％以
上であるとき、正常な凝結が得られる。水硬性アルミナ
／消石灰比が少ないと、硬化体の構成成分として働かな
くなり、硬化しない。When only the hydraulic alumina, slaked lime and water are used for the adjustment, the reaction is too fast to control the condensation and the handling cannot be adjusted well. When silica fume is used in the silica fume and / or sodium silicate aqueous solution, the ratio of hydraulic alumina to slaked lime is 17% hydraulic alumina to the total weight of hydraulic alumina and slaked lime.
When the content of slaked lime is 20% by weight or more, the normal setting is obtained. If the hydraulic alumina / slaked lime ratio is too low, it will not work as a constituent of the hardened product and will not harden.
【００１５】シリカフュームは急結性状には比較的関係
はない。シリカフュームはシリケート成分として無くて
はいけない成分ではあるが、水硬性アルミナのように初
期反応に影響せず、１５〜５５重量％の範囲であれば正
常な凝結を発揮するし、硬化して強度も発現する。Silica fume is relatively unrelated to the quick setting properties. Silica fume is an indispensable component as a silicate component, but it does not affect the initial reaction like hydraulic alumina and exhibits normal coagulation in the range of 15 to 55% by weight, and also has strength after curing. Express.
【００１６】シリカフュームを用いる場合、不焼成セメ
ント硬化体の構成は必ずしも、限定されるものではない
が、好ましくは次のようである。すなわち、図１に示す
ように水硬性アルミナが３５重量％未満であること、水
硬性アルミナと消石灰の比は水硬性アルミナと消石灰の
合計重量に対して水硬性アルミナが１７重量％以上であ
り、消石灰の配合が２０重量％以上で、シリカフューム
は１５〜５５重量％の範囲が望ましい。When silica fume is used, the constitution of the non-fired cement hardened body is not necessarily limited, but the following is preferable. That is, as shown in FIG. 1, hydraulic alumina is less than 35% by weight, the ratio of hydraulic alumina to slaked lime is 17% by weight or more of hydraulic alumina to the total weight of hydraulic alumina and slaked lime, It is desirable that the content of slaked lime is 20% by weight or more and the content of silica fume is 15 to 55% by weight.
【００１７】一方、シリカフュームの代わりに用いる珪
酸ナトリウム水溶液又はシリカフューム及び珪酸ナトリ
ウム水溶液をシリカフューム相当量の珪酸分とする場合
には、水硬性アルミナと消石灰の比は水硬性アルミナと
消石灰の合計重量に対して水硬性アルミナが４０重量％
以下で、しかも消石灰の配合が７５重量％以下であると
き、正常な凝結が得られる。また、消石灰が過剰にある
と硬化体の水和物の結合を阻害して強度発現や正常な凝
結は保てない。On the other hand, when the sodium silicate aqueous solution or the silica fume and the sodium silicate aqueous solution used in place of the silica fume is made to have a silicic acid content corresponding to silica fume, the ratio of hydraulic alumina to slaked lime is based on the total weight of hydraulic alumina and slaked lime. 40% by weight of hydraulic alumina
Below, and when the content of slaked lime is 75% by weight or less, normal setting is obtained. On the other hand, if the amount of slaked lime is excessive, the binding of the hydrate of the hardened product is hindered and strength development and normal setting cannot be maintained.
【００１８】シリカフュームよりは珪酸ナトリウム水溶
液の方が急結性には関係するが水硬性アルミナ成分ほど
急結性はない。珪酸分は硬化体の構成成分として無くて
はならない成分ではあるが、水硬性アルミナのように初
期反応には影響せず、５〜４０重量％の範囲であれば正
常な凝結を発揮するし、長期的な強度も発現する。The aqueous solution of sodium silicate is related to the quick setting property more than silica fume, but it is not as quick setting property as the hydraulic alumina component. The silicic acid content is an essential component as a constituent of the cured product, but it does not affect the initial reaction like hydraulic alumina, and if it is in the range of 5 to 40% by weight, normal condensation is exhibited. It also develops long-term strength.
【００１９】珪酸分として珪酸ナトリウム水溶液を使用
する場合、溶液がアルカリ性であり、シリケート成分は
溶けやすくなり、反応は促進され、シリカフュームの場
合に比べて、少し範囲が狭くなる。不焼成セメント硬化
体の構成は必ずしも、限定されるものではないが、好ま
しくは次のようである。すなわち、図２に示すように、
水硬性アルミナが３５重量％未満であること、水硬性ア
ルミナと消石灰の比は水硬性アルミナと消石灰の合計重
量に対して水硬性アルミナが４０重量％以下であり、こ
れ以上水硬性アルミナ分が増せば、所定のハンドリング
を保てず、水硬性成分水比が高くなり強度低下する。消
石灰が過剰に多いと結合に寄与しないから、消石灰は７
５重量％以下が好ましい。シリカフュームの代わりに珪
酸ナトリウム水溶液または非晶質無水珪酸を反応促進剤
として加える場合の珪酸分は、５〜４０重量％の範囲が
望ましい。When an aqueous sodium silicate solution is used as the silicic acid component, the solution is alkaline, the silicate component is easily dissolved, the reaction is promoted, and the range is narrowed a little compared with the case of silica fume. Although the constitution of the non-fired cement hardened body is not necessarily limited, it is preferably as follows. That is, as shown in FIG.
Hydraulic alumina is less than 35% by weight, and the ratio of hydraulic alumina to slaked lime is 40% by weight or less of hydraulic alumina to the total weight of hydraulic alumina and slaked lime. For example, the predetermined handling cannot be maintained, the hydraulic component water ratio becomes high, and the strength decreases. If there is an excessive amount of slaked lime, it does not contribute to the binding, so
It is preferably 5% by weight or less. When an aqueous solution of sodium silicate or amorphous silicic acid anhydride is added as a reaction accelerator instead of silica fume, the silicic acid content is preferably in the range of 5 to 40% by weight.
【００２０】[0020]
【実施例】〔実施例１〕水硬性アルミナ、シリカフュー
ム、消石灰および石膏の化学組成を表１に示す。この組
成の水硬性アルミナ、シリカフューム、消石灰と石膏と
を配合して、常温養生または蒸気養生により硬化される
から、これにより建材等に利用できる材料の製造を図
る。水硬性アルミナの構成鉱物には、カイアルミナ（χ
−Ａｌ２Ｏ３）及びローアルミナ（ρ−Ａｌ２Ｏ３）が
かなり多く存在する。Example 1 Table 1 shows the chemical compositions of hydraulic alumina, silica fume, slaked lime and gypsum. Since hydraulic alumina, silica fume, slaked lime and gypsum having this composition are mixed and hardened by room temperature curing or steam curing, the production of a material that can be used as a building material or the like is intended. The constituent minerals of hydraulic alumina include chi-alumina (χ
-Al 2 O 3) and rho-alumina (ρ-Al 2 O 3) exists quite a lot.
【００２１】[0021]
【表１】 [Table 1]
【００２２】不焼成セメント硬化体に用いられる各原料
の物理的性質を表２に示す。不焼成セメント硬化体（モ
ルタル）を製造するために必要な原料配合は表３に示
す。水硬性分水比は約０．７５として実施した。水硬性
分水比は、少ないと急結してしまいハンドリングがうま
く調整できない。また、水硬性アルミナと消石灰と水だ
けで調整した場合には反応が早すぎて凝結が調整でき
ず、ハンドリングがうまく調整できない。Table 2 shows the physical properties of each raw material used for the non-fired cement cured product. Table 3 shows the raw material composition necessary for producing an unfired cement hardened product (mortar). The hydraulic water distribution ratio was set to about 0.75. If the hydraulic water-division ratio is too small, it will be set quickly and the handling cannot be adjusted well. In addition, when it is adjusted only with hydraulic alumina, slaked lime and water, the reaction is too fast to control the condensation and the handling cannot be adjusted well.
【００２３】[0023]
【表２】 [Table 2]
【００２４】[0024]
【表３】 [Table 3]
【００２５】また、表３に配合したモルタル混合物１８
種類を室温で硬化させ、１，７，２８日間気中養生し、
強度試験を行った（試験Ｄ）。また気中養生１日で脱型
し、７，２８日まで水中養生した供試体を更に同様に強
度試験を行った（試験Ｗ）。試験結果を表４に示す。Also, the mortar mixture 18 blended in Table 3
Curing the species at room temperature and curing in air for 1,7,28 days,
A strength test was performed (Test D). Further, a test piece that had been demolded in air curing for 1 day and cured in water for 7 or 28 days was further subjected to the same strength test (Test W). The test results are shown in Table 4.
【００２６】[0026]
【表４】 [Table 4]
【００２７】反応過程を調べるために粉末Ｘ線回折によ
り分析したところ、強度発現に寄与すると思われるカル
シウムシリケート水和物の結晶質反応生成物を認めなか
った。注水すると、発熱し反応が急激に起こっているこ
とが水和生成物のエトリンガイトの検出により確認され
た。また、強度発現に寄与する反応生成物は粉末Ｘ線回
折には検出されなかったが、非結晶物質として生成して
いると示唆される。When powder X-ray diffraction analysis was carried out to examine the reaction process, no crystalline reaction product of calcium silicate hydrate, which was thought to contribute to the development of strength, was observed. It was confirmed by detection of hydration product ettringite that heat generation and rapid reaction occurred when water was injected. Further, the reaction product contributing to the development of strength was not detected by powder X-ray diffraction, but it is suggested that it is generated as an amorphous substance.
【００２８】図３に示したように、配合７のペーストで
反応生成物を粉末Ｘ線回折により分析確認した。材齢２
日の硬化体の粉末Ｘ線回折を示す。材齢２日も７日も粉
末Ｘ線回折には大差はない。水和生成物のエトリンガイ
ト、未反応の消石灰、炭酸化によって生じた炭酸カルシ
ウムが検出された以外はなにもでてこない。As shown in FIG. 3, the reaction product was analyzed and confirmed by powder X-ray diffraction using the paste of Formulation 7. Age 2
4 shows powder X-ray diffraction of a cured product of the day. There is no great difference in the powder X-ray diffraction between the ages of 2 days and 7 days. Nothing comes out except that the hydration product ettringite, unreacted slaked lime, and calcium carbonate produced by carbonation were detected.
【００２９】〔実施例２〕シリカフュームの代替として
珪酸ナトリウム水溶液の化学組成を表５に示す。実施例
１のシリカフュームに代えて珪酸ナトリウム水溶液又は
シリカフューム及び珪酸ナトリウム水溶液を用いると、
常温養生または蒸気養生により硬化されるから、これに
より建材等に利用できる材料の製造を図る。[Example 2] Table 5 shows the chemical composition of an aqueous solution of sodium silicate as an alternative to silica fume. When an aqueous sodium silicate solution or an aqueous silica fume and an aqueous sodium silicate solution is used instead of the silica fume of Example 1,
Since it is hardened by room temperature curing or steam curing, it aims to manufacture materials that can be used as building materials.
【００３０】[0030]
【表５】 [Table 5]
【００３１】水硬性アルミナの構成鉱物は、カイアルミ
ナ（χ−Ａｌ２Ｏ３）及びローアルミナ（ρ−Ａｌ２Ｏ
３）がかなり多く存在する。場合によっては、反応促進
剤として用いる非結晶無水珪酸には、純薬のシリカゲル
相当品を用いる。珪酸ナトリウム水溶液を珪酸原料とし
て配合した場合の配合を表６に示す。なお、モルタルお
よびペーストの水分は珪酸ナトリウム水溶液中に含まれ
る水分で補正し、不足する場合は水を供給した。ハンド
リングの関係で水硬性分水比は０．７２〜０．７８で調
整した。The constituent minerals of hydraulic alumina are chi-alumina (χ-Al 2 O 3 ) and rho-alumina (ρ-Al 2 O).
There are many 3 ). In some cases, as the non-crystalline silicic acid anhydride used as the reaction accelerator, a pure drug equivalent to silica gel is used. Table 6 shows the composition when an aqueous sodium silicate solution was compounded as a silicic acid raw material. The water content of the mortar and paste was corrected by the water content contained in the aqueous sodium silicate solution, and when insufficient, water was supplied. The hydraulic water distribution ratio was adjusted to 0.72 to 0.78 due to handling.
【００３２】[0032]
【表６】 [Table 6]
【００３３】図４に珪酸ナトリウム水溶液を珪酸相当量
として配合した場合のＸ線回折図である。材齢２日の硬
化体の粉末Ｘ線回折を示す。材齢２日も７日も粉末Ｘ線
回折には大差はない。水和生成物のエトリンガイト、未
反応の消石灰、炭酸化によって生じた炭酸カルシウムが
検出された以外はなにもでてこない。硬化反応を促進さ
せる薬剤として珪酸ナトリウム水溶液を添加する。硬化
は主としてセメント水和物と同様のエトリンガイト（Ｃ
3Ａ・３ＣaＳＯ4・３２Ｈ2Ｏ）とカルシウムシリケート
水和物のゲル状物質（Ｃ3ＳＨ6など）の生成による。実
施例１と同様にして強度試験を行なった。その結果を表
７に示す。FIG. 4 is an X-ray diffraction diagram in the case where a sodium silicate aqueous solution is added as an amount corresponding to silicic acid. The powder X-ray diffraction of the hardened material of the age 2 days is shown. There is no great difference in the powder X-ray diffraction between the ages of 2 days and 7 days. Nothing comes out except that the hydration product ettringite, unreacted slaked lime, and calcium carbonate produced by carbonation were detected. An aqueous solution of sodium silicate is added as a chemical agent that accelerates the curing reaction. Hardening is mainly due to ettringite (C
Of 3 A · 3CaSO 4 · 32H 2 O) and calcium silicate hydrate by the generation of a gel-like substance (such as C 3 SH 6). A strength test was conducted in the same manner as in Example 1. The results are shown in Table 7.
【００３４】[0034]
【表７】 [Table 7]
【００３５】[0035]
【発明の効果】以上のように本発明は、請求項１に係る
不焼成セメント硬化体では、水硬性アルミナと非晶質無
水珪酸であるシリカフューム又は／及び珪酸ナトリウム
水溶液と消石灰および石膏との組み合わせに水を混合し
て、常温養生または蒸気養生により硬化されて得られる
から、省エネルギー効果及びＣＯ２削減効果を高める不
焼成セメントを得ることができる。As described above, according to the present invention, in the non-fired cement hardened body according to claim 1, a combination of hydraulic alumina and silica fume which is amorphous silicic acid anhydride and / or sodium silicate aqueous solution, slaked lime and gypsum. Since it is obtained by mixing water with water and curing by room temperature curing or steam curing, it is possible to obtain an unfired cement that enhances the energy saving effect and the CO 2 reduction effect.
【００３６】また、請求項２に係る不焼成セメント硬化
体では、前記水硬性アルミナは水と接触して水酸化アル
ミニウムを生成するような遷移アルミナであり、結晶系
はカイアルミナ（χ−Ａｌ２Ｏ３）及びローアルミナ
（ρ−Ａｌ２Ｏ３）を主成分とするから、速硬性を向上
させることができる。Further, in the non-fired cement hardened product according to claim 2, the hydraulic alumina is a transition alumina which forms aluminum hydroxide by contact with water, and the crystal system is chi-alumina (χ-Al 2 Since O 3 ) and rho-alumina (ρ-Al 2 O 3 ) are the main components, rapid hardening can be improved.
【００３７】また、請求項３に係る不焼成セメント硬化
体では、構成成分として前記水硬性アルミナ５〜２５重
量％と、前記非晶質無水珪酸であるシリカフューム又は
／及び珪酸ナトリウム水溶液を珪酸成分として前記シリ
カフューム１５〜４５重量％相当量と、前記消石灰４０
〜７０重量％と、前記石膏約５％と、前記水を残量分と
を混合することから、正常な凝結を発揮し、硬化した後
の強度が高いものとなる。Further, in the non-fired cement hardened product according to claim 3, 5 to 25% by weight of the hydraulic alumina as constituent components, and silica fume or / and sodium silicate aqueous solution which is the amorphous anhydrous silicic acid are used as silicic acid components. 15 to 45% by weight of the silica fume, and the slaked lime 40
Since about 70% by weight, about 5% of the gypsum, and the remaining amount of the water are mixed, normal coagulation is exhibited and the strength after hardening is high.
【００３８】また、請求項４に係る不焼成セメント硬化
体の製造方法では、水硬性アルミナと、非晶質無水珪酸
であるシリカフューム又は／及び珪酸ナトリウム水溶液
と、消石灰と、石膏との組合せに水を混合し、この混合
物を型枠に流し込み、常温養生または蒸気養生により硬
化したことから、建材等に利用できるセメント硬化体が
でき、省エネルギー硬化及びＣＯ２削減効果を有するセ
メント硬化体を得ることができる。Further, in the method for producing a non-fired cement hardened product according to claim 4, a combination of hydraulic alumina, silica fume or / and sodium silicate aqueous solution which is amorphous silicic acid anhydride, slaked lime and gypsum is mixed with water. Is mixed, and the mixture is poured into a mold and cured by normal temperature curing or steam curing, so that a hardened cement that can be used as a building material or the like can be obtained, and a hardened cement that has energy-saving hardening and CO 2 reduction effects can be obtained. it can.
【図１】シリカフュームを使用した三成分圧縮強度(２
８日)の等高線図である。Figure 1: Three-component compressive strength using silica fume (2
It is a contour map of (8th).
【図２】珪酸ナトリウムを使用した三成分圧縮強度(２
８日)の等高線図である。[Fig. 2] Three-component compressive strength using sodium silicate (2
It is a contour map of (8th).
【図３】配合７の材齢２日における粉末Ｘ線回折の結果
を示すグラフである。FIG. 3 is a graph showing the results of powder X-ray diffraction of Formulation 7 after 2 days of age.
【図４】珪酸ナトリウム溶液を珪酸として配合した配合
２５の場合の粉末Ｘ線回折の結果を示すグラフである。FIG. 4 is a graph showing the results of powder X-ray diffraction in the case of the compound 25 in which a sodium silicate solution was compounded as silicic acid.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０４Ｂ 22:08 Ｃ０４Ｂ 22:14 Ｂ 22:14） ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) C04B 22:08 C04B 22:14 B 22:14)
Claims (4)
シリカフューム又は／及び珪酸ナトリウム水溶液と、消
石灰と、石膏と、水との混合物を常温養生又は蒸気養生
により硬化されて得られた硬化体であることを特徴とす
る不焼成セメント硬化体。1. A hardening obtained by hardening a mixture of hydraulic alumina, silica fume which is amorphous silicic acid anhydride and / or an aqueous solution of sodium silicate, slaked lime, gypsum and water by room temperature curing or steam curing. An unfired cement hardened body characterized by being a body.
アルミニウムを生成する遷移アルミナであって、結晶形
はカイアルミナ（χ−Ａｌ２Ｏ３）およびローアルミナ
（ρ−Ａｌ２Ｏ３）を主成分とすることを特徴とする請
求項１記載の不焼成セメント硬化体。2. The hydraulic alumina is a transition alumina which forms aluminum hydroxide upon contact with water and has a crystal form of chi-alumina (χ-Al 2 O 3 ) and rho-alumina (ρ-Al 2 O 3). ) Is a main component, the non-fired cement hardened product according to claim 1.
５重量％と、前記非晶質無水珪酸であるシリカフューム
又は／及び珪酸ナトリウム水溶液を珪酸成分として前記
シリカフューム１５〜４５重量％相当量と、前記消石灰
４０〜７０重量％と、前記石膏約５％と、前記水を残量
分とを混合することを特徴とする請求項１または請求項
２に記載の不焼成セメント硬化体。3. The hydraulic alumina 5 to 2 as a constituent component.
5% by weight, silica fume which is amorphous silicic acid anhydride and / or sodium silicate aqueous solution as a silicic acid component is equivalent to 15 to 45% by weight of silica fume, 40 to 70% by weight of slaked lime, and about 5% of gypsum. The unburned cement hardened product according to claim 1 or 2, wherein the water is mixed with the remaining amount.
シリカフューム又は／及び珪酸ナトリウム水溶液と、消
石灰と、石膏との組合せに水を混合し、この混合物を型
枠に流し込み、常温養生または蒸気養生により硬化した
ことを特徴とする不焼成セメント硬化体の製造方法。4. Water is mixed in a combination of hydraulic alumina, silica fume or / and sodium silicate aqueous solution which is amorphous silicic acid anhydride, slaked lime and gypsum, and the mixture is poured into a mold to cure at room temperature or A method for producing a non-fired cement cured product, characterized by being cured by steam curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001295587A JP4948724B2 (en) | 2001-09-27 | 2001-09-27 | Non-fired cement cured body and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001295587A JP4948724B2 (en) | 2001-09-27 | 2001-09-27 | Non-fired cement cured body and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003095711A true JP2003095711A (en) | 2003-04-03 |
| JP4948724B2 JP4948724B2 (en) | 2012-06-06 |
Family
ID=19116990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001295587A Expired - Fee Related JP4948724B2 (en) | 2001-09-27 | 2001-09-27 | Non-fired cement cured body and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4948724B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022043440A (en) * | 2020-09-04 | 2022-03-16 | ライト工業株式会社 | Solidification material |
| WO2023208755A1 (en) | 2022-04-27 | 2023-11-02 | Evonik Operations Gmbh | Storage of carbon dioxide released from lime |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS569272A (en) * | 1979-06-29 | 1981-01-30 | Nippon Tokushu Rozai Kk | Refractory composition |
| JPS577590B2 (en) * | 1976-12-29 | 1982-02-12 | ||
| JPH09188553A (en) * | 1996-01-09 | 1997-07-22 | Sumitomo Chem Co Ltd | Hydraulic alumina and method for producing the same |
| JPH1067571A (en) * | 1996-08-23 | 1998-03-10 | Sumitomo Chem Co Ltd | Method for producing hydraulic alumina |
| JP2001163650A (en) * | 1999-12-03 | 2001-06-19 | Taiheiyo Cement Corp | Quick setting agent for cement |
-
2001
- 2001-09-27 JP JP2001295587A patent/JP4948724B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS577590B2 (en) * | 1976-12-29 | 1982-02-12 | ||
| JPS569272A (en) * | 1979-06-29 | 1981-01-30 | Nippon Tokushu Rozai Kk | Refractory composition |
| JPH09188553A (en) * | 1996-01-09 | 1997-07-22 | Sumitomo Chem Co Ltd | Hydraulic alumina and method for producing the same |
| JPH1067571A (en) * | 1996-08-23 | 1998-03-10 | Sumitomo Chem Co Ltd | Method for producing hydraulic alumina |
| JP2001163650A (en) * | 1999-12-03 | 2001-06-19 | Taiheiyo Cement Corp | Quick setting agent for cement |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022043440A (en) * | 2020-09-04 | 2022-03-16 | ライト工業株式会社 | Solidification material |
| JP7624813B2 (en) | 2020-09-04 | 2025-01-31 | ライト工業株式会社 | Solidification material |
| WO2023208755A1 (en) | 2022-04-27 | 2023-11-02 | Evonik Operations Gmbh | Storage of carbon dioxide released from lime |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4948724B2 (en) | 2012-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2297062B1 (en) | Binder composition | |
| US10894743B2 (en) | Method for enhancement of mechanical strength and CO2 storage in cementitious products | |
| Mobili et al. | Calcium sulfoaluminate and alkali-activated fly ash cements as alternative to Portland cement: Study on chemical, physical-mechanical, and durability properties of mortars with the same strength class | |
| US8409344B2 (en) | Cement and methods of preparing cement | |
| CN113716927A (en) | Phosphogypsum-based soil curing agent, preparation method thereof, cured sample and preparation method thereof | |
| KR101018009B1 (en) | Manufacturing Method of Cemented Concrete Using Waste Glass Fine Powder and Fly Ash as Binder | |
| JPH08175855A (en) | High sulphate slag cement / early strength slag ash cement and methods for producing these | |
| JP2003277111A (en) | Hardening accelerator and cement composition | |
| TW202323218A (en) | Cement admixture, method for producing cement admixture, and cement composition | |
| JP2003246657A (en) | Hardening accelerator for cement containing incineration ash of sewer sludge and cement composition | |
| JP2003327457A (en) | Portland cement substitute, method for producing the same, hard wood chip cement board using the same, and method for producing the same | |
| JP4948724B2 (en) | Non-fired cement cured body and method for producing the same | |
| JP3888931B2 (en) | Hardened cement and method for producing the same | |
| CN109476541B (en) | Hardening accelerating/hardening retarding compositions for building materials | |
| WO2022224427A1 (en) | Method for producing hydraulic hardened body | |
| JPH07124535A (en) | Curing/coagulating agent of incineration ash and production of building material | |
| JP2832862B2 (en) | Rapid cement admixture for cement | |
| JP7210677B1 (en) | Non-hydraulic cement composition and cementitious material | |
| JP3020962B2 (en) | Highly durable cement composition | |
| JPH0813695B2 (en) | Cement admixture | |
| AU2024295150A1 (en) | Method for producing a hardened cement paste | |
| JP4565126B2 (en) | Method for producing hydraulic materials using waste materials from ceramics building materials | |
| JP2023163710A (en) | Method for producing hydraulic cured body and cement composition for carbonation curing | |
| JP2002068794A (en) | Cement admixture and cement composition | |
| JP2006219319A (en) | Cement admixture and cement composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080521 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20100630 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20110809 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110928 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20120306 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20120307 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20150316 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |