Civil Engineering Reference
In-Depth Information
(a) (b)
13.11
Concrete specimens with honeycombs: (a) partial; (b) total
(Albano et al., 2009).
Tensile strength
Jo et al. (2006) found that polymer concrete made with unsaturated polyester
resin from PeT waste can achieve a very high tensile strength (22.4 MPa
in flexural and 7.85 MPa in splitting test). Considering the replacement of
fine aggregates for PET/GBFS aggregates, Choi et al. (2005) mentioned
a decrease in the splitting tensile strength of 16% for a 25% replacement
volume. Since the loss percentage is higher than for the compressive strength
of the same mixture, this would probably mean that artificial PET aggregates
have a low adhesion to the cement paste. ochi et al. (2007) found that
the use of treated 30 mm long of indented PET fibres can lead to a tensile
strength increase for volume replacements up to 1.5%. Marzouk et al. (2007)
found that the tensile strength and the compressive strength of crushed PeT
concrete composites have a similar loss pattern. For albano et al. (2009)
the tensile strength loss is dependent on the volume of PeT waste as to the
PeT particles dimensions, being that the mixtures with the smallest ones
present lower tensile strength.
