Effects of Temperature Variation on Concrete Surface Electrical Resistivity

Letícia Couto de Aguiara; Adriano de Paula e Silvab; Gabriel Henriques Rabelo Gouvêac; Darlan Ulhoa Leited; Ecirc; nio José Pazini Figueiredoe

Article Details

Effects of Temperature Variation on Concrete Surface Electrical Resistivity

Authors:

Letícia Couto de Aguiara | Adriano de Paula e Silvab | Gabriel Henriques Rabelo Gouvêac | Darlan Ulhoa Leited | Ecirc | nio José Pazini Figueiredoe

Publisher:

AENSI (American-Eurasian Network for Scientific Information)

Journal:

Australian Journal of Basic and Applied Sciences Vol.14 Issue 12, pp.10-16

Document Type:

Article

Publication Date:

1/2020

Document Language:

English

Document ID (Org No.):

2001858048

pISSN:

1991-8178

Abstract:

 Electrical resistivity is an important property of concrete, related to the risk of rebar corrosion. Studies related to the maintenance and reinforced concrete structures service life have established resistivity as a parameter of durability and quality. Resistivity is a property that is influenced not only by materials characteristics, but also by environment conditions. The influence of temperature on concrete surface electrical resistivity measurements, and consequently, the risk of rebar corrosion are not well known and need further studies. The aim of this paper is to analyze resistivity variations caused by temperature and environmental changes. Three experimental stages were established. In the first stage, this study analyzed concrete surface electrical resistivity variations due to changes in water/cement ratio during the cure. In the second stage, surface electrical resistivity variations in concrete samples exposed to an external environment were evaluated, part of the specimens were maintained wet (saturated) and part were dry (unsaturated) and assessments were made at different times of the day. In the third stage, the research analyzed temperature and its effects in concrete surface electrical resistivity. The results show that a decrease in water/cement ratio from 0,65 to 0,45, increased by approximately two times concrete surface electrical resistivity values. They also show that resistivity values increase approximately two times from day 3 to day 28 for both water cement ratio. Analyzing each of the series used in this study, surface electrical resistivity values of the wet (saturated) sample were lower than those of the dry (unsaturated) sample. Lastly, the most important result of this article is that concrete surface electrical resistivity values varied inversely to the temperature. The increase of environment temperature by 1ºC resulted in a 1.23% reduction in the surface electrical resistivity of concrete. [.

Article Details

Effects of Temperature Variation on Concrete Surface Electrical Resistivity

Authors: Letícia Couto de Aguiara | Adriano de Paula e Silvab | Gabriel Henriques Rabelo Gouvêac | Darlan Ulhoa Leited | Ecirc | nio José Pazini Figueiredoe

Publisher: AENSI (American-Eurasian Network for Scientific Information)

Journal: Australian Journal of Basic and Applied Sciences Vol.14 Issue 12, pp.10-16

Document Type: Article

Publication Date: 1/2020

Document Language: English

Document ID (Org No.): 2001858048

pISSN: 1991-8178

Issues

Authors:

Letícia Couto de Aguiara | Adriano de Paula e Silvab | Gabriel Henriques Rabelo Gouvêac | Darlan Ulhoa Leited | Ecirc | nio José Pazini Figueiredoe

Publisher:

AENSI (American-Eurasian Network for Scientific Information)

Journal:

Australian Journal of Basic and Applied Sciences Vol.14 Issue 12, pp.10-16

Document Type:

Article

Publication Date:

1/2020

Document Language:

English

Document ID (Org No.):

2001858048

pISSN:

1991-8178