Corrosion of Modified Concrete with Sugar Cane Bagasse Ash

Abstract

Concrete is a porous material and the ingress of water, oxygen, and aggressive ions, such as chlorides, can cause the passive layer on reinforced steel to break down. Additives, such as fly ash, microsilica, rice husk ash, and cane sugar bagasse ash, have a size breakdown that allows the reduction of concrete pore size and, consequently, may reduce the corrosion process. The objective of this work is to determine the corrosion rate of steel in reinforced concrete by the addition of 20% sugar cane bagasse ash by weight of cement. Six prismatic specimens (7 × 7 × 10 cm) with an embedded steel rod were prepared. Three contained 20% sugar cane bagasse ash by weight of cement and the other three did not. All specimens were placed in a 3.5% NaCl solution and the corrosion rate was determined using polarization resistance. The results showed that reinforced concrete containing sugar cane bagasse ash has the lowest corrosion rates in comparison to reinforced concrete without the additive.

Corrosion Behavior 304 and 316 Stainless Steel as Reinforcement in Sustainable Concrete Based on Sugar Cane Bagasse Ash Exposed to Na2SO4

“…The electrochemical cell was according to the ASTM G59 [17] to use the electrochemical technique of linear polarization resistance (LPR) and the results were analyzed using "Analysis" of ACM version 4, see figure 2. The parameters used to perform the LPR test, they were the same as those used by other researchers [18], the sweep potential was ±20 mV with respect to the corrosion potential and the sweep rate was 10 mV/minute, the IR drop potential was considered. The corrosion current density (I corr ) were estimated from resistance to charge transference (Rct) using:…”

Corrosion Behavior of Galvanized Steel Embedded in Concrete Exposed to Soil Type MH Contaminated With Chlorides

“…The specimens were placed in containers with the soil type MH contaminated with 0, 1, 2 and wt. 3% NaCl by weight of the soil, later to carry out the electrochemical evaluation using techniques Corrosion Potentials and Linear Polarization Resistance as is done by the scientific community (Nuñez et al, 2012;Almeraya et al, 2013;Bastidas et al, 2015).…”

Performance of ecological cement-based composites containing sugarcane bagasse ash – A review

“…Only few studies report results from electrochemical testing. Two studies contrast about the addition of SCBA and its effect on the corrosion of reinforced steel embedded in cement-based composites [40][41]. However, those studies were carried out considering a short-term period for testing leading to some uncertainties.…”