TY - CONF A1 - Carabba, L. A1 - Masi, G. A1 - Pirskawetz, Stephan A1 - Krüger, Simone A1 - Gluth, Gregor A1 - Bignozzi, M.C. A2 - Serdar, M. A2 - Stirmer, N. A2 - Provis, J. T1 - Thermal properties and steel corrosion in light-weight alkali-activated mortars T2 - Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019), Vol. 1: New Generation of Construction Materials N2 - This study aims at investigating the use of coal fly ash-based alkali activated mortars as passive fire protection system for steel structures. These systems are used to slow down the temperature rise of the steel substrate in case of fire. In addition, the protective system should guarantee the ability to prevent and/or mitigate steel corrosion phenomena. The behavior of a light-weight mortar was compared to that of a normal-weight mortar. Density and porosity were measured to better characterize the physical properties of the mortars. The degree of protection in case of fire was assessed by performing medium-scale fire tests. Acoustic emission measurements were conducted to analyze cracking phenomena during the high temperature exposure. The corrosion process was evaluated using an electrochemical approach in order to monitor the durability of the developed material. Preliminary results show that a 20 mm-thick layer of light-weight mortar is able to protect the steel substrate from reaching the critical temperature of 500 °C for 38 minutes in case of cellulosic fire. In addition, alkali activated mortars provide protection for carbon steel in presence of aggressive environment (i.e. presence of chlorides). The corrosion resistance is strictly related to the physical properties of the developed mortars. PB - RILEM Publications CY - Paris T2 - International Conference on Sustainable Materials, Systems and Structures (SMSS 2019) CY - Rovinj, Croatia DA - 20.03.2019 KW - Fire resistance KW - Steel corrosion KW - Acoustic emission KW - Alkali-activated materials PY - 2019 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/47584 AN - OPUS4-47584 SN - 978-2-35158-223-7 VL - 1 SP - 125 EP - 132 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany