Saudi Journal of Engineering and Technology (SJEAT)
Volume-6 | Issue-08 | 214-226
Original Research Article
Corrosion Resistance Potential Bond-slip Mechanisms of Reinforcing Steel in Corrosive Media
Sornaate Lucky Easy, Ugo Kingsley, Charles Kennedy
Published : Aug. 6, 2021
Abstract
This study investigated the potential use of eco-friendly material of organic classes to curb the menace of corrosion effect on reinforcing embedded in concrete structures and exposed to corrosive media. The obtained results of 36 concrete cubes; 12 controlled, 12 uncoated (corroded) and 12 exudates / resins coated cured for 360 days under freshwater and induced corrosion accelerated process as detailed in experimental procedures. From the computed results, the maximum obtained value of the corroded sample is -39.551% as against 78.562% and 82.183% of controlled and coated samples respectively. The results showed decreased failure bond load in corroded sample and an increase in coated judging from controlled sample as a standard for comparison. The results of bond strength maximum obtained values are corroded -29.789% against controlled 35.831% and 67.905%, enumerative results showed low and decreased bond strength of corroded samples resulted from the effect of corrosion damaged to the reinforcing surface and fibre. Higher bond strength obtained from coated samples resulting from the gummy and sticky exudates/resin that formed higher bonding with the rib. Results of slippage in controlled and coated samples showed higher values to failure as against lower slippage in coated. Results indicated that the diameter of uncoated decreased by maximum value of -1.293% and coated increased by 1.31%, results showed that reduction is attributed to the effect of corrosion on the surface modification through the formation of pits and unusual expansion, also similar factor is applicable on the cross - sectional area, corroded has maximum reduction value of (-7.414% and coated increased by 14.934%, weight loss and gain are corroded -28.567% decreased (loss) and coated 48.006% increase (gain). Summarized results showed the effect of affected the overall mechanical properties of reinforcing steel thereby reducing bond characteristics of steel and concrete by creating stresses in the surroundings and further weakened pullout bond resulting in diameter and cross – sectional area reduction and weight decreased. The effect of coating increased diameter and cross – sectional area and weight gain resulting from the varying thickness coated to reinforcing steel.