AH(3) phase in the hydration product system of AFt-AFm-AH(3) in calcium sulfoaluminate cements: A microstructural study

作者：Zhang, Yangyang; Chang, Jun^*; Ji, Juan

来源：Construction and Building Materials, 2018, 167: 587-596.

DOI：10.1016/j.conbuildmat.2018.02.052

• Calcium sulfoaluminate cement
• Hydration
• AH(3) phase
• Rietveld methodology
• Crystallite size

In calcium sulfoaluminate cements, two hydration product systems, namely the monosulfate (AFm) - aluminum hydroxide (AH(3)) system and the ettringite (AFt) - AH(3) system, were created based on the reactions of ye'elimite with and without gypsum. From chemically synthesized samples, the composition and microstructure of the AH(3) phase in the hydration product system AFt-AFm-AH(3) were characterized using X-ray diffraction, Rietveld method, thermogravimetric analysis, Al-27 magic angle spinning nuclear magnetic resonance spectroscopy, field emission scanning electron microscopy, and inductively coupled plasma optical emission spectroscopy. It was seen that AH(3) phase in both AFm-AH(3) system and AFt-AH(3) system had a gibbsite-like structure presented in a microcrystalline or nanocrystalline structure, while the AH(3) phase in the AFt-AH(3) system had an average crystallite size close to 20 nm.

• 出版日期2018-4-10
• 单位大连理工大学