The Influence of Permanent Expanded Polystyrene Formwork on Fire Resistance of Self-Compacting and Normal Vibrated Concretes

The influence of permanent expanded polystyrene formwork on fire resistance of selfcompacting concrete (SCC) is investigated in this paper. A type of SCC is produced andcured at two different conditions, one at traditional condition and the other inside expanded polystyrene forms. A type of normal vibrated concrete with similar compressive strength isalso produced and cured at the same conditions for comparing purposes. The specimens are exposed to different high temperatures. The residual mechanical strengths, phase composition and porosity changes at high temperatures are investigated. The insulating permanent forms raised the risk of spalling of concretes and had important influences on residual mechanical strengths of the concrete.