Influência da idade e cura do concreto na resistividade elétrica
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2015-12-02
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Universidade Federal de Goiás
Resumo
The surface electrical resistivity of the fresh and hardened concrete states can be
influenced by factors such as degree of hydration, the water / binder ratio (w / b),
aggregate content and existence of armour. This study objective is to evaluate the
performance and behavior of the electrical resistivity of the concrete´s surface based
on the influence of hidratation process, curing time and the w/b ratio. The actual
measured were divided into three groups, where C-0,81 represents the specific
group with w/b ratio= 0.81 and compressive strength =20 MPa; C-0,50 is the
concrete with w/b ratio= 0.50 and 40 MPa; and C-0,35 represents the concrete with
the ratio of 0.35 and compressive strength of 60 MPa. The curing procedures applied
to the three groups were: dry cure, cure submerged up to seven days and cure
submerged up to fourteen days. This study the results showed that in the higher ratio
w/b , the porosity of the sample is greater, and this increases the electrical resistivity.
Regarding the dry cured concrete, it had higher resistivity vs submerged conrete. The
results also showed that greater the degree hydratation in the sample the greater the
resistivity.
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PEREZ, E. W. R. Influência da idade e cura do concreto na resistividade elétrica. 2015. 94 f. Dissertação (Mestrado em Engenharia Civil) - Universidade Federal de Goiás, Goiânia, 2015.