Micro-nanostructures of TOBERMORITE (cas 1319-31-9) hydrothermal-synthesized from fly ash and municipal solid waste incineration fly ash

Add time:08/16/2019    Source:sciencedirect.com

TOBERMORITE (cas 1319-31-9) has attracted extensive attention as the main hydrothermal product of autoclaved aerated concrete. The optimum hydrothermal synthesis conditions, micro-nanostructure and properties of the solid wastes-based tobermorite were analyzed using XRD, SEM, XRF, TG-DSC, FT-IR, MAS-NMR and nano-indentation. The results indicated that the optimum molar ratio of Ca/Si was 1.0, the mix mass ratio of MSWIFA/(FA + MSWIFA) was up to 62.6%; The incorporation of MSWIFA reduced the degree of polymerization and micromechanical properties of tobermorite, impeded the synthesis of silicon tetrahedron chain and the formation of fibrous tobermorite, and resulted in a low hardness and elastic modulus of tobermorite.

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