TY - CONF A1 - Hlavacek, Petr A1 - Rünger, M. A1 - Gluth, Gregor A1 - Kühne, Hans-Carsten T1 - Alkali activated fly ash mortars: Identification of chloride transport coefficient for various mixture compositions T2 - EuroCoalAsh 2017, Conference Proceedings N2 - The main objective of this work is to determine chloride migration coefficients for alkali activated fly ash-based mortars. The effect of various mixture composition is studied. The identified values will be used in simulations of chloride transport in the alkali-activated composites, mainly to determine a critical time span of exposition to chlorides causing corrosion of reinforcement. Rapid chloride migration experiments (RCM) are performed on cylindrical specimens, 100 mm diameter, 50 mm height. Low voltage electric field (10–30 V DC) is applied as a driving force for the accelerated chloride penetration. The chloride front in the sample is identified according to NT Build 492 standard after given time of penetration (depending on the electrical current ~ 3 hours) on a fracture surface using silver nitrate solution. Further, accelerated diffusion experiments are performed in order to verify the migration coefficients obtained using RCM. The total chloride content is determined, and chloride profiles obtained on powder ground from separate layers of the specimen. T2 - EuroCoalAsh 2017 CY - Brno, Czech Republic DA - 06.02.2017 KW - Alkali activation KW - Fly ash KW - Chloride transport PY - 2017 SN - 978-80-214-5469-9 SP - 27 EP - 30 AN - OPUS4-39143 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -