JP2014114182A - Production method of cement based hydration mixture, cement based hydration mixture, and cement based cured body - Google Patents

Production method of cement based hydration mixture, cement based hydration mixture, and cement based cured body Download PDF

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JP2014114182A
JP2014114182A JP2012269158A JP2012269158A JP2014114182A JP 2014114182 A JP2014114182 A JP 2014114182A JP 2012269158 A JP2012269158 A JP 2012269158A JP 2012269158 A JP2012269158 A JP 2012269158A JP 2014114182 A JP2014114182 A JP 2014114182A
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cement
cement based
polysaccharide
mixture
production method
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Kazuo Ichinomiya
一夫 一宮
Takeshi Tsuruta
健 鶴田
Eiji Yanase
英司 簗瀬
Hiroshi Matsuda
浩 松田
Seiji Kaneko
誠二 金子
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Institute of National Colleges of Technologies Japan
Materras Oume Kougyou Corp
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Materras Oume Kougyou Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a production method of a cement based hydration mixture that can prevent a crack generated by dry shrinkage or autogenous shrinkage that arises from that a concrete and a mortar that are a representative of a cement based water cured body are installed and then exposed to a natural environment, and further that has self-repairing of a crack after the crack; the cement based hydration mixture; and a cement based cured body.SOLUTION: A production method of a cement based hydration mixture is characterized in that a polysaccharide that is collected from a cultivation body in which a pseudomonas bacterium is cultivated, and that a viscosity rises in a high alkali condition which a cement mixture forms to become a gel state is mixed when milling and mixing a cement.

Description

本発明は、セメント系水硬物の代表であるコンクリート、モルタルが打設された以降に自然環境に曝されて生じる乾燥収縮あるいは自己収縮によって発生するひび割れを防止でき、さらにはひび割れ後のひび割れを修復する自己修復性を有するセメント系水和混合物の製造法、セメント系水和混合物、及びセメント系硬化物に関する。   The present invention can prevent cracks caused by dry shrinkage or self-shrinkage caused by exposure to the natural environment after placing concrete or mortar, which is representative of cement-based hydraulic materials, and further prevent cracks after cracking. The present invention relates to a method for producing a self-healing cement-based hydrated mixture, a cement-based hydrated mixture, and a cement-based cured product.

コンクリートは社会基盤造成に必須の構造材料で、概ね全ての構造物に使われている。しかし、石灰石と粘土を高温で焼成して製造するセメントと水、粗骨材、細骨材を常温で練り混ぜて製造することから、セメントの水和反応は発熱反応であり、硬化過程での温度差による温度応力によるひび割れや乾燥収縮によるひび割れが発生する。このひび割れの対策として、低発熱セメントや石膏主体にした混和剤を添加してセメント中のカルシウムアルミネートと石膏を反応させ、結晶水を３２分子持つエトリンガイトを生成させる処置が採られているが、解決には至っていない。特に高強度を期待した場合はこのような対策でのひび割れ防止は困難である。
このようにコンクリートのひび割れ対策は、コンクリートを扱う永遠の課題であり、殆ど対処手法としてひび割れに接着剤を注入する工法が採用されており、最近では耐震性向上もあいまって補修企業が成長産業化しており、古い構造物の建て替え等新規公共投資予算の足かせにもなっている。 Concrete is an essential structural material for the creation of social infrastructure, and is used in almost all structures. However, since limestone and clay are manufactured by mixing cement and water, coarse aggregate, and fine aggregate at room temperature, the hydration reaction of the cement is an exothermic reaction, Cracking due to temperature stress due to temperature difference and cracking due to drying shrinkage occur. As a countermeasure against this cracking, a low heat-generating cement and an admixture mainly composed of gypsum are added to react calcium aluminate and gypsum in the cement to generate ettringite having 32 molecules of crystal water. It has not yet been resolved. In particular, when high strength is expected, it is difficult to prevent cracks by such measures.
In this way, cracking of concrete is an eternal problem dealing with concrete, and a method of injecting adhesive into cracks is almost adopted as a countermeasure, and repair companies have recently become a growing industry due to improved earthquake resistance. It is a drag on new public investment budgets such as rebuilding old structures.

わが国の土木を中心にした社会資本整備は、高度成長期から活発化し、１９８０年代をピークに年々新規社会資本整備に係わる投資から、維持管理、耐震改修などのリニューアル事業の投資を余儀なくされている。その要因は、海砂を使った鉄筋コンクリートの鉄筋の錆び膨張によるひび割れ、アルカリ骨材反応によるひび割れ、そしてコンクリートの宿命による乾燥収縮を中心にしたひび割れによるコンクリート構造物の劣化、そして道路構造物のように通行車両が大型化し、通行量の増加に伴う積載荷重による劣化である。
要因の明確な海砂の利用とかアルカリ骨材の利用は、学会を中心にその対策が取られているが、乾燥収縮によるひび割れや温度応力のよるひび割れについては、根本的解決には至っていない。その要因の一つに人為的管理が伴う施工というが関与しており、施工業者のコンクリート打設管理の良否があり、その人為的の係わりを解決する適切なコンクリート混和剤が求められていると言っても過言でない。 Social capital development centered on civil engineering in Japan has been activated from the period of high growth, and since the 1980s it has been forced to invest in renewal projects such as maintenance and seismic retrofit, etc. . The cause is the deterioration of concrete structures caused by rust expansion of reinforced concrete using sea sand, cracks caused by alkali-aggregate reaction, and cracks centered on drying shrinkage caused by concrete fate, and road structures. This is a deterioration due to the load that accompanies an increase in the volume of traffic and the increase in traffic.
The use of sea sand with clear factors or the use of alkali aggregates has been addressed mainly by academic societies, but cracks due to drying shrinkage and cracks due to thermal stress have not been fundamentally resolved. One of the factors is that construction involving human management is involved, and there is a quality of concrete placement management by contractors, and there is a need for an appropriate concrete admixture that solves the human involvement. It is no exaggeration to say.

近年、全く異なる分野ではあるが、特許文献１には、食品や化粧料の粘性特性の改善等の目的で使用されてきたキタンサンガムを初めとする他糖体に対し、高いアルカリ性条件でも特異な粘性特性を有する多糖体及びその製造方法が提案され、市場にその他糖体が提供されるに至り、本発明者等はその技術に着目した。   Although it is a completely different field in recent years, Patent Document 1 discloses a unique viscosity even under high alkaline conditions against other sugars such as chitansan gum which has been used for the purpose of improving the viscosity characteristics of foods and cosmetics. A polysaccharide having characteristics and a method for producing the same have been proposed, and other sugars have been provided to the market. The present inventors have paid attention to the technology.

特許第３０５７２２１号公報Japanese Patent No. 3057221

前述のようにコンクリートが有するひび割れの問題、及び該ひび割れによるコンクリート構造物の劣化の問題は宿命的な課題であり、現在でも有効な対策が採られていないという実情があった。   As described above, the problem of cracks in concrete and the problem of deterioration of concrete structures due to the cracks are fatal problems, and there has been a situation that no effective countermeasures have been taken even now.

そこで、本発明は、セメント系水硬物の代表であるコンクリート、モルタルが打設された以降に自然環境にさらされて生じる乾燥収縮あるいは自己収縮によって発生するひび割れを防止でき、さらにはひび割れ後のひび割れを修復する自己修復性を有するセメント系水和混合物の製造法、セメント系水和混合物、及びセメント系硬化物を提案することを目的とする。   Therefore, the present invention can prevent cracks caused by dry shrinkage or self-shrinkage caused by exposure to the natural environment after the concrete or mortar is placed, which is representative of cement-based hydraulic materials. It aims at proposing the manufacturing method of the cementitious hydration mixture which has a self-repairing property which repairs a crack, a cementitious hydration mixture, and a cementitious hardened | cured material.

本発明は上記に鑑み提案されたもので、セメント混合物が形成する高いアルカリ条件で粘度が高まり、ゲル状態になるシュードモナス属細菌を培養した培養物から採取される多糖体（以下、単に本多糖体という）を、セメント練り混ぜ時に混合することを特徴とするセメント系水和混合物の製造法に関するものである。   The present invention has been proposed in view of the above, and a polysaccharide (hereinafter simply referred to as the present polysaccharide) collected from a culture in which a Pseudomonas bacterium that becomes viscous and gels in a high alkaline condition formed by a cement mixture is cultured. )) At the time of cement kneading.

また、本発明は、前記製造法によって得られるセメント系水和混合物であって、シュードモナス属細菌を培養した培養物から採取される多糖体をセメント練り混ぜ時に混合することによって粘度が高まりゲル化を促進させることができること特徴とするセメント系水和混合物をも提案する。   The present invention also relates to a cement-based hydrated mixture obtained by the above-mentioned production method, wherein a polysaccharide collected from a culture in which Pseudomonas bacteria are cultured is mixed at the time of cement kneading to increase viscosity and cause gelation. Also proposed is a cementitious hydrated mixture characterized in that it can be promoted.

さらに、本発明は、前記製造法によって得られるセメント系水和混合物を硬化させたものであることを特徴とするセメント系硬化物をも提案する。   Furthermore, the present invention also proposes a cement-based cured product obtained by curing a cement-based hydrated mixture obtained by the above production method.

詳しく説明すると、コンクリートやモルタルは混練時にセメントの水和反応で生じる遊離石灰（Ca(OH)2）で強アルカリ条件となるが、この水和混合物はそのままではペースト状、低粘性を示す。そこで、本発明では、セメント練り混ぜ時にシュードモナス属細菌を培養した培養物から採取される多糖体を混合することにより、この多糖体がアルカリ条件でゲル化すると共に混練りによる力で微細状態となってコンクリートやモルタルの中に分散し、系全体の水分保持力を高めることを特徴にしている。
要するに本発明に用いたシュードモナス属細菌を培養した培養物から採取される多糖体は、ｐＨが中性や弱酸性領域ではペースト状、あるいは低粘性を示すが、アルカリ条件が増すと高粘性やゲル化の状態になるという特性を有するため、系全体の水分保持力（保水性）を高め、脱型後の乾燥収縮や自己収縮を低減することができる。 More specifically, concrete and mortar are strongly alkaline due to free lime (Ca (OH) 2 ) generated by the hydration reaction of cement during kneading, but this hydrated mixture is paste-like and low viscosity as it is. Therefore, in the present invention, by mixing a polysaccharide collected from a culture in which Pseudomonas bacteria are cultured at the time of cement mixing, this polysaccharide gels in an alkaline condition and becomes a fine state by the force of kneading. It is characterized by being dispersed in concrete and mortar to increase the moisture retention of the entire system.
In short, the polysaccharides collected from the culture of Pseudomonas bacteria used in the present invention show a paste or low viscosity in a neutral or weakly acidic region, but when the alkaline conditions increase, Therefore, the moisture retention (water retention) of the entire system can be increased, and drying shrinkage and self-shrinkage after demolding can be reduced.

なお、多糖類としては、水溶性の天然多糖類であるキタンサンガムやＤ−フルクトフラノース残基のみからなるホモ多糖でありレバンなどが知られているが、これらの多糖類は通常からゲル化していて、混合しても良く混ざらない。
また、他の多糖類としては、コンクリートやモルタルに、アグロバクテリウム又はアルカリゲネスの培養液から得られるβ１，３グルカンであるカードランを添加して打設時の流動性を高める工法が既に開発されているが、この場合はカードランが疎水性となってコンクリートやモルタルの安息角を減少させるボールベアリング効果によって系全体の流動性が高まっている。
さらに、水中打設向けに材料分離を避ける目的で、メチルセルロース系の増粘剤が用いられる方法も知られているが、この場合は単なる混練り水の粘性を高める効果しかない。同様な狙いで吸水ゲルを添加する試みもされているが、吸水ゲルそのものの粒径に左右され、コンクリートやモルタル全体に分散させる技術が課題である。 As polysaccharides, water-soluble natural polysaccharides such as chitansan gum and D-fructofuranose residues are homopolysaccharides and levan is known, but these polysaccharides are usually gelled. Even if mixed, it does not mix well.
As other polysaccharides, a method has been developed to increase the fluidity during placement by adding curdlan, which is a β1,3-glucan obtained from a culture solution of Agrobacterium or Alkagenes to concrete or mortar. However, in this case, the curdlan becomes hydrophobic and the fluidity of the entire system is enhanced by the ball bearing effect that reduces the angle of repose of concrete and mortar.
Furthermore, a method in which a methylcellulose thickener is used for the purpose of avoiding material separation for underwater casting is known, but in this case, there is only an effect of increasing the viscosity of kneaded water. Attempts have also been made to add a water-absorbing gel with the same aim, but depending on the particle size of the water-absorbing gel itself, a technique for dispersing it throughout concrete and mortar is an issue.

本発明のセメント系水和混合物の製造法は、高アルカリ条件下でゲル化するシュードモナス属細菌を培養した培養物から採取される多糖体を添加し、コンクリートやモルタル内で均一に分散させることによって系全体の水分保持力（保水性）を高め、脱型後の乾燥収縮や自己収縮を低減することができる工法である。
そして、この製造法にて得られるセメント系水和混合物、及びそれを硬化させたセメント系硬化物は、従来にない優れた性状、特性を備え、土木、建築を代表とする分野に多大な貢献を果たすことが期待される。
また、本発明では、前記多糖体をセメント練り混ぜ時に混合するという極めて簡易な操作を追加（実施）することにより、前述の極めて有効な効果を奏するものであり、本多糖体を除く他の材料についてはそのまま用いることができ、極めて実用的価値が高いものである。 The method for producing a cement-based hydrated mixture according to the present invention comprises adding a polysaccharide collected from a culture in which Pseudomonas bacteria that gel under high alkaline conditions are added, and uniformly dispersing the mixture in concrete or mortar. It is a construction method that can increase the moisture retention (water retention) of the entire system and reduce drying shrinkage and self-shrinkage after demolding.
The cement-based hydrated mixture obtained by this production method, and the cement-based cured product obtained by curing the cement-based hydrate, have unprecedented superior properties and characteristics, and contribute greatly to fields represented by civil engineering and architecture. Is expected to fulfill
Further, in the present invention, the above-mentioned extremely effective effect is achieved by adding (implementing) an extremely simple operation of mixing the polysaccharide at the time of cement kneading, and other materials excluding the polysaccharide Can be used as is, and has extremely high practical value.

また、本発明のセメント系水和混合物、及びセメント系硬化物は、前記多糖体が高い保水性を備えているため、仮にひび割れが生じても、残存するセメント未水和鉱物と反応する水分を供給することやひび割れから浸透する雨水などの水分を吸水することでひび割れの自己修復作用が期待される。
しかも上述の効果があれば、年間１億ｍ3も打設されているコンクリートの標準混和剤に採用されることが期待される。また、従来、コンクリート２次製品メーカは製品の出荷工程の関係から水和反応を高める為に蒸気養生などがされているが、水和が未熟な為にひび割れが製品歩留まりを低下させる要因となっている。コンクリート２次製品は年間１５００万ｍ3（全体の約１５％）製造されており、本発明にてひび割れが低減されれば、製品品質が向上し、コンクリート廃棄物が著しく減少する。
さらに、コンクリートのひび割れはわが国だけの問題ではなく、世界的課題でもある。そのため、本発明の製造法が実証されれば、世界的にて極めて膨大な構造物に利用でき、しかもそのコンクリート構造物がひび割れが低減できることで長持ちすることから、社会基盤整備に画期的成果として注目を集めることが期待できる。 Further, in the cement-based hydrate mixture and cement-based cured product of the present invention, since the polysaccharide has high water retention, even if cracks occur, moisture that reacts with the remaining cement unhydrated minerals. Self-healing action of cracks is expected by supplying water such as rainwater that penetrates from cracks.
In addition, if the above-mentioned effects are obtained, it is expected to be adopted as a standard admixture for concrete that has been cast 100 million m 3 per year. Conventionally, concrete secondary product manufacturers have been using steam curing to enhance the hydration reaction because of the shipping process of the product, but cracking is a factor that reduces the product yield because hydration is immature. ing. Secondary concrete products are produced 15 million m 3 (about 15% of the total) per year. If cracks are reduced in the present invention, product quality is improved and concrete waste is significantly reduced.
In addition, cracking of concrete is not only a problem for Japan but also a global issue. Therefore, if the manufacturing method of the present invention is demonstrated, it can be used for an extremely large number of structures worldwide, and the concrete structure can last for a long time because cracks can be reduced. Can be expected to attract attention.

実施例におけるセメントと細骨材、水、流動化剤等を含む配合に本多糖体を混合したセメント系水和物の自己収縮ひずみと混練後の硬化材齢との関係を示すグラフである。It is a graph which shows the relationship between the self shrinkage | contraction distortion | strain of the cement-type hydrate which mixed this polysaccharide with the mixing | blending containing the cement, fine aggregate, water, a fluidizing agent, etc. in an Example, and the hardening material age after kneading | mixing.

本発明のセメント系水和混合物の製造法は、前述のようにセメント混合物が形成する高いアルカリ条件で粘度が高まり、ゲル状態になるシュードモナス属細菌を培養した培養物から採取される多糖体を、セメント練り混ぜ時に混合することを特徴とする。
このアルカリ条件で粘度が高まり、ゲル状態になるシュードモナス属細菌を培養した培養物から採取される多糖体を、以下の説明では、単に「本多糖体」と記すが、この本多糖体は、前記特許文献１にて提案された多糖体であり、既にダイソー株式会社等にて製造販売され、容易に入手することができる。 As described above, the method for producing a cement-based hydrated mixture according to the present invention includes a polysaccharide collected from a culture in which Pseudomonas bacteria that become viscous and gel in a high alkaline condition formed by the cement mixture are cultured. It is characterized by mixing at the time of cement mixing.
In the following description, the polysaccharide collected from a culture in which Pseudomonas bacteria that become viscous and gel in this alkaline condition are cultured will be simply referred to as “the present polysaccharide”. It is a polysaccharide proposed in Patent Document 1, which is already manufactured and sold by Daiso Corporation and can be easily obtained.

本発明のセメント系水和混合物の製造法では、前述のように本多糖体をセメント練り混ぜ時に混合するという極めて簡易な操作を追加（実施）することにより、系全体の水分保持力（＝保水性）を高め、脱型後の乾燥収縮や自己収縮を低減するという極めて有効な効果を奏するものであり、この製造法にて得られるセメント系水和混合物、及びそれを硬化させたセメント系硬化物は、従来にない優れた性状、特性を備え、土木、建築を代表とする分野に多大な貢献を果たすものである。
また、本多糖体を除く他の材料（セメント、水、細骨材、粗骨材、その他のフライアッシュ等の混和材など）についてはそのまま用いることができ、極めて実用的価値が高いものである。 In the method for producing a cement-based hydrated mixture of the present invention, as described above, by adding (implementing) a very simple operation of mixing the polysaccharide during cement mixing, the water retention capacity of the entire system (= water retention capacity). The cement-based hydrated mixture obtained by this production method, and the cement-based curing obtained by curing the cement-based hydrated mixture, are effective in reducing drying shrinkage and self-shrinkage after demolding. Objects have excellent properties and characteristics that have never been seen before, and contribute greatly to fields such as civil engineering and architecture.
In addition, other materials (such as cement, water, fine aggregate, coarse aggregate, and other admixtures such as fly ash) other than the polysaccharide can be used as they are and have extremely high practical value. .

より詳しくは、前述のように本多糖体はアルカリ条件で粘度が高まり、ゲル状態になる特性を有するため、セメント練り混ぜ時にこの本多糖体を混合して練り混ぜ機械で混合すると、セメントから溶出するアルカリによって本多糖体の粘度が高まり、混合課程で細かく細断され、微細な多糖体のゲルがセメント混合物の中に分散する。
また、本多糖体は高い保水性を有するため、この多糖体を含むセメント系水和混合物が硬化した後、本多糖体から硬化後の未水和セメントに水分を供給し、未水和セメントの水和を促進することができる。
また、本多糖体は高い保水性を有するため、この多糖体を含むセメント系水和混合物が硬化した後、乾燥等による水分の蒸散を抑制し、乾燥収縮を防止することが可能である。
また、本多糖体を含むセメント系水和混合物にひび割れが生じた場合、本多糖類の保持する水分によってひび割れにあるセメント未水和生物と水分が反応して新たなセメント水和鉱物が形成することが可能である。
また、本多糖体は１００％天然物であり、役目の終わったセメント水和混合物が解体された場合も生物分解性があり、無機化される。 More specifically, as described above, this polysaccharide has the property of increasing its viscosity under alkaline conditions and becoming a gel state. Therefore, when this polysaccharide is mixed and mixed with a kneading machine during cement mixing, it is eluted from the cement. The viscosity of the polysaccharide increases due to the alkali, and is finely chopped in the mixing process, and the fine polysaccharide gel is dispersed in the cement mixture.
In addition, since this polysaccharide has high water retention, after the cement-based hydrated mixture containing this polysaccharide has hardened, water is supplied from this polysaccharide to the unhydrated cement after hardening. Hydration can be promoted.
Moreover, since this polysaccharide has high water retention, after the cement-based hydrated mixture containing this polysaccharide is cured, it is possible to suppress moisture transpiration due to drying and prevent drying shrinkage.
In addition, when cracks occur in the cement-based hydrated mixture containing this polysaccharide, the moisture retained by this polysaccharide reacts with the unhydrated organisms in the crack and forms new cement hydrated minerals. It is possible.
The polysaccharide is a 100% natural product and is biodegradable and mineralized when the cement hydration mixture that has finished its function is disassembled.

［実施例］
〈本多糖体の特性（粘性変化）〉
前記特許文献１（特許第３０５７２２１号公報）によるシュードモナス属細菌を培養した培養物から採取される多糖体（以下、本多糖体という）の培養液の状態、並びに酸又はアルカリを添加してｐＨを変化した状態における粘性の関係を表１に示す。
培養液状態からｐＨ４にすると本多糖体は粘性が低くなり、この液状態でセメント系水和物を混練製造すると良く混合されて混合物全体に行きわたり、セメントが水和反応を始めると粘性は基に戻ってゲル化する。よって、水和物及び硬化物全体の本多糖体添加による水分保持力が高まる。 [Example]
<Characteristics of this polysaccharide (viscosity change)>
The state of the culture solution of a polysaccharide (hereinafter referred to as the present polysaccharide) collected from a culture in which Pseudomonas bacteria are cultured according to Patent Document 1 (Patent No. 3057221), and the pH is adjusted by adding acid or alkali. Table 1 shows the relationship of the viscosity in the changed state.
When the pH of the polysaccharide is adjusted to 4 from the culture solution state, the viscosity of the polysaccharide decreases. When the cement-based hydrate is kneaded and manufactured in this liquid state, the mixture is well mixed and reaches the entire mixture. Go back to gel. Therefore, the water retention power of the entire hydrate and cured product due to the addition of the polysaccharide increases.

〈セメント系水和物の自己収縮ひずみ〉
表２に示す配合のセメント系水和物において、その自己収縮ひずみと混練後の硬化材齢との関係を調べ、その結果を図１に示した。
なお、実施例は前記本多糖体を添加した配合であり、比較例Ａは基本配合（無添加）であり、比較例Ｂは通常紙おむつなどに使われている吸水剤（高吸水性ポリマー）を添加した配合である。 <Self-shrinkage strain of cementitious hydrate>
In the cement-based hydrate having the composition shown in Table 2, the relationship between the self-shrinkage strain and the age of the hardened material after kneading was examined, and the result is shown in FIG.
In addition, an Example is the mixing | blending which added this said polysaccharide, the comparative example A is a basic mixing | blending (no addition), and the comparative example B is a water absorbing agent (high water absorption polymer) normally used for a paper diaper etc. It is the added formulation.

〈結果及び考察〉
図１に示すように、セメントと細骨材、水、流動化剤等を含む配合に本多糖体を混合したセメント系水和物は、無添加である比較例Ａ及び吸水剤ＳＡＰを配合した比較例Ｂに比べて自己収縮ひずみが材齢４０日まで発生していない。
また、比較例Ａ（無添加）に見られるように、通常は硬化後にすぐ自己収縮ひずみが発生するが、本多糖体を添加した実施例は自己収縮ひずみが減少する傾向となり、自己収縮によるひび割れの危険を低減している効果が確認された。 <Results and discussion>
As shown in FIG. 1, the cement-based hydrate obtained by mixing this polysaccharide with a blend containing cement and fine aggregate, water, fluidizing agent, etc. was blended with Comparative Example A and the water-absorbing agent SAP which were not added. Compared with Comparative Example B, the self-shrinkage strain does not occur until the age of 40 days.
In addition, as seen in Comparative Example A (no addition), self-shrinkage strain usually occurs immediately after curing, but in the examples to which this polysaccharide was added, the self-shrinkage strain tends to decrease and cracks due to self-shrinkage occur. It has been confirmed that the risk of reducing the risk.

本発明のセメント系水和混合物の製造法は、前述のようにセメント混合物が形成する高いアルカリ条件で粘度が高まり、ゲル状態になるシュードモナス属細菌を培養した培養物から採取される多糖体を、セメント練り混ぜ時に混合することを特徴とする。
このアルカリ条件で粘度が高まり、ゲル状態になるシュードモナス属細菌を培養した培養物から採取される多糖体を、以下の説明では、単に「本多糖体」と記すが、この本多糖体は、前記特許文献１にて提案された多糖体であり、既に製造販売され、容易に入手することができる。 As described above, the method for producing a cement-based hydrated mixture according to the present invention includes a polysaccharide collected from a culture in which Pseudomonas bacteria that become viscous and gel in a high alkaline condition formed by the cement mixture are cultured. It is characterized by mixing at the time of cement mixing.
In the following description, the polysaccharide collected from a culture in which Pseudomonas bacteria that become viscous and gel in this alkaline condition are cultured will be simply referred to as “the present polysaccharide”. It is a polysaccharide proposed in Patent Document 1, which has already been manufactured and sold and can be easily obtained.

Claims (3)

セメント混合物が形成する高いアルカリ条件で粘度が高まり、ゲル状態になるシュードモナス属細菌を培養した培養物から採取される多糖体を、セメント練り混ぜ時に混合することを特徴とするセメント系水和混合物の製造法。   A cement-based hydrated mixture characterized in that a polysaccharide collected from a culture in which a Pseudomonas bacterium that grows in a highly alkaline condition and forms a gel state is mixed at the time of cement mixing. Manufacturing method. 請求項１に記載の製造法によって得られるセメント系水和混合物であって、シュードモナス属細菌を培養した培養物から採取される多糖体をセメント練り混ぜ時に混合することによって粘度が高まりゲル化を促進させることができること特徴とするセメント系水和混合物。   A cement-based hydrated mixture obtained by the production method according to claim 1, wherein a polysaccharide collected from a culture in which Pseudomonas bacteria are cultured is mixed during cement mixing to increase viscosity and promote gelation. A cement-based hydrated mixture characterized in that 請求項１に記載の製造法によって得られるセメント系水和混合物を硬化させたものであることを特徴とするセメント系硬化物。   A cement-based cured product obtained by curing a cement-based hydrated mixture obtained by the production method according to claim 1.
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