DTA-TGA evaluations of the CaO–Al2O3–SiO2–H2O system treated hydrothermally
作者： Danielle S Klimesch , Abhi Ray
DOI: 10.1016/S0040-6031(99)00140-9
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摘要: Abstract DTA-TGA in combination with XRD and wet chemical techniques was employed to explain the effect of composition starting raw mix, maintaining Al 2 O 3 content constant, on formations hydrogarnet Al-substituted 11 A tobermorite. Three mixes bulk Ca/(Al + Si) atom ratios 1.0, 0.8, 0.6 industrially important CaO–Al –SiO –H system were investigated following hydrothermal treatment at 180°C for up 23 h. The stability decreased increasing silica extended presence portlandite lime-rich calcium silicate hydrate. formation tobermorite accelerated decreasing ratio. Changes exotherm profiles, due crystallization beta-wollastonite, reaction time provided evidence incorporation into crystal lattice. concurrent decrease amount proof that this phase supplied most
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