Influence of Ammonia Content in SNCR Fly Ash on Phase Composition and Morphology of Autoclaved Aerated Concrete (AAC)

• DOI: 10.4028/www.scientific.net/ssp.276.167
• Publication Date: 2018-06-26T10:41:09Z
• Authors: Lucie Galvánková; Matěj Lédl; Tomáš Opravil; Denisa Beranová; Jakub Tkacz
• Keywords: Autoclaved aerated concrete; Morphology; Ammonia production

In production of AAC the fly ash was used as a source SiO 2 for many years. Now, after introducing selective non-catalytic reduction (SNCR) technology to coal combustion process, contain ammonia in form soluble salts, such NH 4 HSO and (NH ) SO , which causes problems during manufacturing AAC. Among all influence ions phase composition final product not fully described. The main aim this contribution is describe morphology autoclaved aerated concrete (AAC). For preparing laboratory conditions, with various content used. amount before hydrothermal reaction measured by VIS spectrofotometry. prepared samples determined means X-ray diffractometry confirmed TG-DTA analysis. products studied scanning electron microscopy.