Synthesis of calcium silicate hydrate with Ca/Si = 2 by mechanochemical treatment

Kaori Sasaki, Tsuguya Masuda, Hideki Ishida, Takeshi Mitsuda

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19 Citations (Scopus)


An amorphous, C-S-H-like phase with Ca/Si = 2 was synthesized from amorphous precipitated silica, calcium oxide, and water by mechanochemical treatment using a vibration mill at room temperature. The product was studied by XRD, 29Si MASNMR, TEM, analytical TEM, and TGA-DTA. After 14 h of treatment, the starting materials react to form an amorphous phase (C-S-H-like phase). The XRD pattern of C-S-H-like phase resembles the C-S-H formed hydrothermally or by cement hydration except it has no reflection at 0.182 nm. The 29Si NMR results revealed a silicate anion structure of C-S-H-like phase consisting mainly of a mixture of a monomer and a dimer. On heating, the C-S-H-like phase decomposed into β-dicalcium silicate below 1000°C.

Original languageEnglish
Pages (from-to)472-476
Number of pages5
JournalJournal of the American Ceramic Society
Issue number2
Publication statusPublished - 1997 Feb 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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