SANTOS; Cristina Calmeiro dos; RODRIGUES, João P.(2015) - Experimental research on the residual mechanical properties of an ordinary concretes after fire. In: International Fire Safety Symposium, Coimbra, 20-23 de Abril. Coimbra: [s.n.] . p. 1-12
Title
Experimental research on the residual mechanical properties of an ordinary concretes after fire
Subject
Concrete Fire Cooling process Strength Spalling
Date
2016-06-14T15:01:00Z 2016-06-14T15:01:00Z 2015-04
Description
This paper summarizes the results of an experimental research to assess the residual
mechanical properties of an ordinary concrete after fire. It was studied the influence of the
cooling process, the maximum temperature that the concrete was subjected to and the loading
level on the residual mechanical properties of calcareous and granite aggregate concretes. The
properties studied were the residual compressive, tensile, splitting and flexural strengths and
modulus of elasticity. Four levels of temperature; 20, 300, 500 and 700ºC; two loading levels
(0.3f and 0.7fcd) and two cooling processes (cooling in the air and by water jet) were tested. The
high temperatures attained and the sudden cooling down process on the concrete showed a
negative effect on its residual mechanical properties. This effect was more notorious on the
residual compression strength than in the other mechanical properties
