Abstract
The effect of fire exposure on the mechanical performance of reinforced ceramsite lightweight aggregate concrete was investigated. Two groups of beams were cast at the same time, exposed to fire at about 800 °C and then naturally cooled. The beams were tested by applying two point transverse loads incrementally. The load-deflection relationships both of bending and shear tests were recorded. For bending test, the disappearance of crack turning points in the loading curves, reduction of yielding and ultimate loads, and increase in deflection were observed. The reduction of ultimate load and increase in deflection of beams after fire in shear test were also observed. After loading test, the load-deflection relationships of main reinforcing bars and stirrups were tested to discuss the effect of fire on the reinforcing bars in beams.
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