@article{HolzmeisterWeichholdGrolletal.2021,
  author    = {Holzmeister, Ib and Weichhold, Jan and Groll, J{\"u}rgen and Zreiqat,, Hala and Gbureck, Uwe},
  title     = {Hydraulic reactivity and cement formation of baghdadite},
  series = {Journal of the American Ceramic Society},
  volume    = {104},
  journal   = {Journal of the American Ceramic Society},
  number    = {7},
  doi       = {10.1111/jace.17727},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-259457},
  pages     = {3554-3561},
  year      = {2021},
  abstract  = {In this study, the hydraulic reactivity and cement formation of baghdadite (Ca\(_{3}\)ZrSi\(_{2}\)O\(_{9}\)) was investigated. The material was synthesized by sintering a mixture of CaCO\(_{3}\), SiO\(_{2}\), and ZrO\(_{2}\) and then mechanically activated using a planetary mill. This leads to a decrease in particle and crystallite size and a partial amorphization of baghdadite as shown by X-ray powder diffraction (XRD) and laser diffraction measurements. Baghdadite cements were formed by the addition of water at a powder to liquid ratio of 2.0 g/ml. Maximum compressive strengths were found to be ~2 MPa after 3-day setting for a 24-h ground material. Inductively coupled plasma mass spectrometry (ICP-MS) measurements showed an incongruent dissolution profile of set cements with a preferred dissolution of calcium and only marginal release of zirconium ions. Cement formation occurs under alkaline conditions, whereas the unground raw powder leads to a pH of 11.9 during setting, while prolonged grinding increased pH values to approximately 12.3.},
  language  = {en}
}