The Impact of Fly Ash after SNCR Treated with Tannin-Based Products on AAC Production

• DOI: 10.4028/www.scientific.net/ssp.296.173
• Publication Date: 2019-08-16T08:35:10Z
• Authors: Matěj Lédl; Lucie Galvánková; Rostislav Drochytka
• Keywords: Tannin; Alkalinity; Thixotropy; Autoclaved aerated concrete

This paper is focused on the effect of treatment fly ash after selective non-catalytic reduction (SNCR) with tannin autoclaved aerated concrete (AAC) production in order to reduce or stop ammonia leakage from fresh mixture due its alkalinity. A pure form and a tannin-based product „Farmatan“ were used as dosage ranging 0,5 g – 3 agent per 1 kg ash. Efficient was determined at 2 wt.% by speed an indicator change gaseous diluted water. The rheological properties mixtures observed consistency test Viskomat showing that Farmatan causes delay hydration. results bulk density compressive strength testing revealed increase higher amount decreases because thermal crack formation combined delayed hydration thixotropy. Using x-ray diffraction (XRD) analysis there no differences phase composition observed.