Reinforcement Corrosion Testing in Concrete and Fiber Reinforced Concrete Specimens Exposed to Aggressive External Factors

Abstract

One of the leading causes of reinforced concrete degradation is chloride attack. It occurs due to the penetration of chlorides through pores and cracks into the concrete cover. This phenomenon becomes more dangerous if reinforced concrete elements are subjected to cyclic temperature changes. The concrete cover protects against corrosion. This paper presents research, the primary purpose of which was to determine the effect of the addition of steel fibers to concrete on the development of corrosion of the main reinforcement. The tests were carried out on three types of reinforced concrete specimens made of ordinary concrete and concrete with different amounts of steel fibers (0.25% and 0.50%). In order to initiate corrosion processes, specimens were partially submerged in a 3% sodium chloride solution and were subjected to freeze–thaw cycles. The electrochemical polarization galvanostatic pulse method was used for analyzing the reinforcement corrosion activity. Moreover, it was verified whether the corrosion of reinforced concrete elements affects the acoustic emission wave velocity. The addition of steel micro-reinforcement fibers increases the corrosion resistance of reinforced concrete. In addition, a strong linear correlation between the AE wave velocity and the values of the corrosion current density was revealed.

Behavior of Potential of Half-Cell AISI 1018 and GS in Concrete Buried in Sand in the Presence of MgSO4

“…However, the Gulf of Mexico is considered the most corrosive environment. Therefore, the studies that try to contribute to reducing this problem are currently numerous [3]- [5].…”

Non-Destructive Testing Methods for In Situ Crack Measurements and Morphology Analysis with a Focus on a Novel Approach to the Use of the Acoustic Emission Method

“…The research-based recommendations provided in Model Code 2010 [6] indicate three damage mechanisms: Carbonation-induced corrosion; Chloride-induced corrosion; Freezing/thawing. It can be concluded that the intensity of these three destructive processes is strongly influenced by the formation and development of cracks in a component or a structure [9].…”

Anticorrosive Efficiency of the AISI 316 SS in Sustainable Ecological Concrete Manufactured with SCBA-SF Exposed to Magnesium Sulphate

“…In general, the prevention of the corrosion of reinforced steel begins from the phase of design and production of the concrete, selection of materials, preparation, compression and cured. In order to produce concrete of quality, the stipulated norms for its durability in front of aggressive mediums must be followed, which could save millions of dollars in premature maintenance [30]- [34]. The problem of corrosion of reinforcing steel is a problem of great importance worldwide, which is why various research has been carried out from various perspectives, simulating environments, concrete, special steels, the inclusion of pozzolanic materials, etc., in order to contribute to mitigating this phenomenon [35]- [41].…”