JP6929828B2 - カーボネーション可能な微細構造ケイ酸カルシウムクリンカおよびその製造方法 - Google Patents
カーボネーション可能な微細構造ケイ酸カルシウムクリンカおよびその製造方法 Download PDFInfo
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Description
本出願は、2015年3月20日にともに出願された、米国仮出願第62/136,201号および第62/136,208号の優先権の利益を主張し、その全体の内容が、本明細書にその全体を参照することにより組み込まれる。
カーボネーションが可能なケイ酸カルシウムクリンカおよびセメントのサンプルを、クリンカ内または個々の粒子内の相の分布に関する情報を得るために、エポキシに埋め込み、研磨し、炭素で被覆した。サンプルを後方散乱電子(BSE)イメージングモードの走査電子顕微鏡(SEM)によって分析した。各相のコントラストは、その相の化学量論に関連しており、高い平均原子番号の元素を含むより濃い相は、より低い平均原子番号を有するより低密度の相よりも明るく現れる。種々の相のコントラストは、各相の平均原子番号
を用いて計算したBSEコントラスト係数ηの比較によって関連付けることとしてもよい。
特許、特許出願、特許公開公報、ジャーナル、本、論文、ウェブコンテンツのような他の文献に対する参考および引用が、本開示でなされている。全てのこのような文献は、全ての目的のために、その全体において、参照により本明細書に組み込まれる。本明細書で参照により組み込まれることとなるが、本明細書で明示的に示される既存の定義、ステートメント、または他の開示材料と矛盾する、あらゆる材料、またはその一部は、援用された材料と本開示の材料との間で矛盾が生じない程度でのみ援用される。矛盾する場合には、矛盾は、好ましい開示として本開示の利益となるように解決されることとする。
本明細書に開示される代表的な例示は、本発明を説明することを補助することが意図され、本発明の範囲を限定することは意図されず、またそれらはそのように解釈されるべきではない。実際に、本発明およびそのさらなる多くの実施形態の種々の変更は、本明細書に示されて開示されるものに加えて、本明細書で挙げられる科学および特許文献への参照および本明細書に含まれる例示を含む本書類の全内容から、当業者にとって明らかとなるであろう。これらの例示は、その種々の実施形態およびその均等物における本発明の実施に適合し得る重要な追加の情報、例証、およびガイダンスを含む。
Claims (13)
- 少なくとも1つのカーボネーションが可能なケイ酸カルシウム相を含むマトリックスに分散された、0.1μmから1,000μmの直径を有する非カーボネーションシリカ(SiO2)の粒子、並びに
メリライト((Ca,Na,K) 2 (Al,Mg,Fe)[(Al,Si)SiO 7 ])および/またはアモルファス相を含みかつ前記非カーボネーションシリカの粒子を囲む中間層、
を含み、
前記少なくとも1つのカーボネーションが可能なケイ酸カルシウム相が、ウォラストナイトおよび偽珪灰石のうち少なくとも1つ、並びに、ランキナイト(Ca3Si2O7)およびビーライト(Ca2SiO4)のうち少なくとも1つを含む、非水硬性のクリンカ材料。 - 全酸化物質量に対して30%以下のAl、Fe、およびMgの金属酸化物を含む、請求項1のクリンカ材料。
- 前記中間層は、Al2O3、Fe2O3、MgO、K2O、およびNa2Oから選択される1つ以上の成分を含むアモルファス相を含み、
任意に、前記マトリックスは、Al2O3、Fe2O3、MgO、K2O、およびNa2Oから選択される1つ以上の成分をさらに含む、請求項2のクリンカ材料。 - 前記中間層は、0.1μmから250μmの厚みを有する、請求項2または3のクリンカ材料。
- 前記アモルファス相は、体積%で、全固相の10%以上を占める、請求項2から4のいずれかのクリンカ材料。
- 元素Caおよび元素Siが0.8から1.2の原子比で存在する、請求項1から5のいずれかのクリンカ材料。
- 周囲大気圧から周囲より150psi上回るまでの範囲の圧力を有し、10%から99%の範囲のCO2濃度を有する水およびCO2の雰囲気下で、1時間から150時間、30℃から90℃の温度でのCO2による、質量を10%以上増加させたCaCO3を得るカーボネーションに適する、請求項1から6のいずれかのクリンカ材料。
- 全酸化物質量に対して30%以下のAl、Fe、およびMgの金属酸化物を含む、請求項1から7のいずれかのクリンカ材料。
- ブレンドした前駆物質の組成物を得るために、1つ以上の前駆物質を混合するステップであって、前記組成物中、元素Caおよび元素Siは、0.8から1.2の原子比で存在し、Al、Fe、およびMgの金属酸化物は、質量%で30%以下で存在するステップと、
クリンカ材料を製造するための十分な時間のあいだ、800℃〜1400℃の温度に前記ブレンドした前駆物質の組成物を加熱するステップとを含む、請求項1から8のいずれかのクリンカ材料の製造方法。 - 前記前駆物質が、石灰石、砂、シルト、砂岩、シリカリッチ粘土、および珪藻土から選択され、
任意に、前記ブレンドした前駆物質の組成物は、クリンカ材料を製造するための十分な時間の間、900℃〜1300℃の範囲の温度で加熱される、請求項9の方法。 - 前記ブレンドした前駆物質の組成物の加熱は、大気圧下で行われる、請求項9または10の方法。
- 請求項1から8のいずれかのクリンカ材料を粉砕することにより製造される粉末状材料であって、8μmから25μmの平均粒子径(d50)、10%の0.1μmから3μmの大きさの粒子(d10)、および90%の30μmから100μmの大きさの粒子(d90)により特徴づけられ、
任意に、少なくとも1つのカーボネーションが可能な相により、表面の少なくとも10%が覆われ、および/または単相粒子および多相粒子を含む、粉末状材料。 - 前記単相粒子は、ウォラストナイト(CaSiO3)、ランキナイト(Ca3Si2O7)およびC2S(Ca2SiO4)から選択されるカーボネーションが可能な相の単相粒子、部分反応性アモルファス相の単相粒子、またはメリライト((Ca、Na、K)2[(Mg、Fe2+、Fe3+、Al、Si)3O7])および結晶性シリカ(SiO2)、またはこれらのあらゆる2以上のタイプの組み合わせから選択される非カーボネーション相の単相粒子を含む、請求項12の粉末状材料。
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