Microstructure of amorphous aluminum hydroxide in belite-calcium sulfoaluminate cement

Belite-calcium sulfoaluminate (BCSA) cement is a promising low-CO₂ alternative to ordinary Portland cement. Herein, aluminum hydroxide (AH₃), the main amorphous hydration product of BCSA cement, was investigated in detail. The microstructure of AH₃ with various quantities of gypsum was investigated via scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). The AH₃ with various morphologies were observed and confirmed in the resulting pastes. Particular attention was paid to the fact that AH₃ always contained a small amount of Ca according to the results of EDS analysis. The AH₃ was then characterized via high resolution transmission electron microscopy (HRTEM). The results of HRTEM indicated that Ca arose from nanosized tricalcium aluminate hexahydrate which existed in the AH₃.

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  • Accession Number: 01573617
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 21 2015 2:42PM