Open AccessANALYSIS OF THE SPECIMEN'S DIMENSIONS VARIATION INFLUENCE IN SELF -COMPACTING CONCRETE BULK ELECTRICAL RESISTIVITY
Author(s) -
Maria Auxiliadora de Barros Martins,
Fernando Batista Pinto,
Regina Mambeli Barros,
Mírian de Lourdes Noronha Motta Melo
Publication year - 2021
Publication title -
brazilian journal of development
Language(s) - English
Resource type - Journals
ISSN - 2525-8761
DOI - 10.34117/bjdv7n5-477
Subject(s) - electrical resistivity and conductivity , materials science , composite material , statistical analysis , penetration (warfare) , engineering , mathematics , electrical engineering , statistics , operations research
The electrical resistivity is an important concrete property because it is directly related to the chloride ions penetration that cause the depassivation of the reinforcement, being a corrosion-causing agent. In Brazil, the bulk electrical resistivity test is described by ABNT NBR 9204/2012 (ABNT, 2012) which defines the specimen dimensions as Ø 150 x 150mm and the use of liquid mercury electrodes. Several studies of electrical resistivity are found using varying dimensions of specimens. This article aimed to analyze whether the variation in the specimen dimensions has a significant influence on the bulk electrical resistivity results of the same self-compacting concrete mixture. Three specimens were used for each geometry, Ø 50x100mm, Ø 100x100mm, Ø 100x200mm and Ø 150x150mm. Electrical resistivity was assessed at 28 and 90 days and statistical analysis was performed using the ANOVA program.