Abstract (EN):
The aim of this investigation work is threefold: 1) To analyse and quantify freeze-thaw
resistance of glass fibre reinforced epoxy polymer mortars, comparatively to both normal cement
mortars and plain epoxy polymer mortars; 2) To determine glass fibre reinforcement effect on
freeze-thaw behaviour; and 3) To evaluate the reliability of ASTM C666M-03 test methodology for
the assessment of freeze-thaw resistance of polymer concrete materials. For this purpose several test
specimens, normal cement mortars, plain and glass-fibre reinforced epoxy polymer mortars were
submitted to freeze-thaw cycling between 36 up to 300 cycles, according to the above norm.
Dynamic elasticity modulus, with basis on fundamental resonance frequency measurements, was
calculated every 36 cycles, and the correspondent relative dynamic elasticity modulus was
determined for each cycling period. In order to assess the reliability of this non-destructive test
methodology, three specimens of each formulation were withdrawn at regular periods and tested in
bending and compression. Relative mechanical strengths, as function of conditioning period, were
compared with corresponding relative dynamic modulus of elasticity.
Idioma:
Português
Tipo (Avaliação Docente):
Científica
Contacto:
juvandes@fe.up.pt