Synthesis of Hydrates for C<SUB>3</SUB>A-CaSO<SUB>4</SUB>·2H<SUB>2</SUB>O-CaCO<SUB>3</SUB>-Na<SUB>2</SUB>SO<SUB>4</SUB>-H<SUB>2</SUB>O System

• LEE Jong-kyu

  Tokyo Institute of Technology

• OHBA Yoko

  Tokyo Institute of Technology

• SAKAI Etsuo

  Tokyo Institute of Technology

• DAIMON Masaki

  Tokyo Institute of Technology

Bibliographic Information

Other Title

• 3CaO・Al<SUB>2</SUB>O<SUB>3</SUB>-CaSO<SUB>4</SUB>・2H<SUB>2</SUB>O-CaCO<SUB>3</SUB>-Na<SUB>2</SUB>SO<SUB>4</SUB>-H<SUB>2</SUB>O系水和物の合成
• 3CaO Al2O3 CaSO4 2H2O CaCO3 Na2SO4 H2Oケ

Abstract

This paper discuss the synthesis of standard hydrates and the drying method for XRD quantitive analysis of C₃A-CaSO₄·2H₂O-CaCO₃-Na₂SO₄-H₂O system. Monocarboaluminate was synthesized by using of mixture of C₃A and CaCO₃ (mole ratio 1 : 1). Combined water of monocarboaluminate (mole ratio) was 10.4 by aspirator drying after 3 h. Hemicarboaluminate was formed by the mixture of C₃A : CaCO₃ : Ca (OH) ₂ = 1 : 1/2 : 1/2 at 28 day. Combined water of hemicarboaluminate was 11.2 by aspirator drying after 3 h. Chemical compositions of ettringite and monosulfoaluminate were C₃A·3CaSO₄·31.4H₂O and C₃A·CaSO₄·11.5H₂O respectively by the same drying method. Single phase of U was formed by the mixture of C₃A : CaSO₄·2H₂O : Na₂SO₄ = 1 : 0.9 : 0.5. The chemical composition of U phase may be C₃A·0.9CaSO₄·0.5Na₂SO₄·13H₂O.

Journal

• Inorganic Materials

  Inorganic Materials 4 (268), 196-204, 1997

  The Society of Inorganic Materials, Japan

Keywords

• C<SUB>3</SUB>A
• Monocarbolauminate
• Hemicarboaluminate
• U phase
• Ettringite
• Monosulfoaluminate
• Hydrogarnet
• XRD quantitive analysis
• Drying method

Details

• CRID: 1390001205390108160
• NII Article ID: 10002122686
• NII Book ID: AN10455831
• ISSN: 13407899
• ISSN: 2185436X
• DOI: 10.11451/mukimate1994.4.196
• NDL BIB ID: 4206210
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4206210
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed