Accelerated carbonation effect on electrical resistivity and sorptivity of concrete View Full Text


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Article Info

DATE

2018-12

AUTHORS

Ronaldo A. Medeiros-Junior, José R. Hino Júnior, Ana Júlia A. E. Monteiro, Gabriela H. Bill, Ian Y. Kawanami

ABSTRACT

Electrical resistivity and sorptivity are properties related to concrete durability. Electrochemical corrosion is a degradation process that can be monitored with electrical resistivity analysis. Concrete carbonation is directly related to corrosion, reducing the microstructures pH and causing despassivation of the steel. Thus, this paper evaluated the influence of carbonation on electrical resistivity and sorptivity of concrete specimens mixed with three water-cement ratio (0.4, 0.5 and 0.6). Carbonation was accelerated through a chamber, with temperature, relative humidity and CO2 concentration controlled. The carbonation depth for water-cement ratios of 0.4, 0.5 and 0.6 was 7.6, 10.5 and 13.4 mm, respectively (45 days of exposure). The results suggest that carbonation increases both electrical resistivity and sorptivity for concretes with same water-cement ratios. It is related to the pore refinement and decrease in pore diameter caused by carbonation reaction. From correlations between tests, high values for determination coefficient were found, between 0.946 and 0.990. More... »

PAGES

7

References to SciGraph publications

  • 2018-12. Effect of preconditioning temperature on the water absorption of concrete in JOURNAL OF BUILDING PATHOLOGY AND REHABILITATION
  • 2017-12. Partial replacement and addition of fly ash in Portland cement: influences on carbonation and alkaline reserve in JOURNAL OF BUILDING PATHOLOGY AND REHABILITATION
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    http://scigraph.springernature.com/pub.10.1007/s41024-018-0035-3

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    http://dx.doi.org/10.1007/s41024-018-0035-3

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