%A MESSAOUDENE, IBRAHIM %A MOLEZ, LAURENT %A JAUBERTHIE, RAOUL %A KESSAL, OUSSAMA %A SLAMA, LAHCENE %D 2016 %T EFFECT OF THE QUENCHING IN WATER OF THE CEMENTITIOUS MATERIALS SUBJECTED TO FIRE %K %X Many studies have permitted the analysis of the mechanical behavior of concrete subjected to high temperatures. However, no one has done any work on the effect of re-humidification of cementitious materials exposed to a real fire. This is the first study.  To better simulate the effects of a real fire, a test with wood fire is developed. Different cementitious materials (hardened cement pastes, and mortar) are subject to this heating for 1hour. The results of tests indicate that: The average resistance loss is in the order of 60% after exhibition in fire. The re-humidification (sudden quenching in water) allowed a recovery of mass about 10% and consequently a gain of compressive strength about 40%. Internal micro-structure analysis of cement pastes studied by XRD and the observation by a scanning electron microscope (SEM) shows that after the re-humidification, the cement rehydrates again (formation of Portlandite and CSH). Those observations explain the increase mechanical strength.  %U https://revues.univ-biskra.dz/index.php/cds/article/view/1439 %J Courrier du Savoir %0 Journal Article %V 20 %@ 1112-3338 %8 2016-01-18